[COMPOSER] Added predis/predis and updated packages

composer.json

@@ -29,6 +29,7 @@
         "paragonie/constant_time_encoding": "^1.0.4",
         "pear/console_getopt": "^1.4",
         "phpseclib/phpseclib": "dev-master#f815e43077da67d3dd5b4d18a45753f5b79c1ab9",
+        "predis/predis": "^1.1",
         "stomp-php/stomp-php": "^4.5.1"
     },
     "require-dev": {

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "4e6cb6938aa6af5b33db71e5793f1b54",
+    "content-hash": "4e83b529986a0bb04c0ee1326a099ebe",
     "packages": [
         {
             "name": "apereo/phpcas",
@@ -1073,6 +1073,56 @@
             ],
             "time": "2019-06-23T16:33:59+00:00"
         },
+        {
+            "name": "predis/predis",
+            "version": "v1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nrk/predis.git",
+                "reference": "f0210e38881631afeafb56ab43405a92cafd9fd1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nrk/predis/zipball/f0210e38881631afeafb56ab43405a92cafd9fd1",
+                "reference": "f0210e38881631afeafb56ab43405a92cafd9fd1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.8"
+            },
+            "suggest": {
+                "ext-curl": "Allows access to Webdis when paired with phpiredis",
+                "ext-phpiredis": "Allows faster serialization and deserialization of the Redis protocol"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Predis\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Daniele Alessandri",
+                    "email": "suppakilla@gmail.com",
+                    "homepage": "http://clorophilla.net"
+                }
+            ],
+            "description": "Flexible and feature-complete Redis client for PHP and HHVM",
+            "homepage": "http://github.com/nrk/predis",
+            "keywords": [
+                "nosql",
+                "predis",
+                "redis"
+            ],
+            "time": "2016-06-16T16:22:20+00:00"
+        },
         {
             "name": "psr/http-message",
             "version": "1.0.1",
@@ -2912,18 +2962,18 @@
             "authors": [
                 {
                     "name": "Arne Blankerts",
-                    "email": "arne@blankerts.de",
+                    "role": "Developer",
-                    "role": "Developer"
+                    "email": "arne@blankerts.de"
                 },
                 {
                     "name": "Sebastian Heuer",
-                    "email": "sebastian@phpeople.de",
+                    "role": "Developer",
-                    "role": "Developer"
+                    "email": "sebastian@phpeople.de"
                 },
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "Developer",
-                    "role": "Developer"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
@@ -2959,18 +3009,18 @@
             "authors": [
                 {
                     "name": "Arne Blankerts",
-                    "email": "arne@blankerts.de",
+                    "role": "Developer",
-                    "role": "Developer"
+                    "email": "arne@blankerts.de"
                 },
                 {
                     "name": "Sebastian Heuer",
-                    "email": "sebastian@phpeople.de",
+                    "role": "Developer",
-                    "role": "Developer"
+                    "email": "sebastian@phpeople.de"
                 },
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "Developer",
-                    "role": "Developer"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Library for handling version information and constraints",
@@ -3365,8 +3415,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "lead",
-                    "role": "lead"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Library that provides collection, processing, and rendering functionality for PHP code coverage information.",
@@ -3416,8 +3466,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "lead",
-                    "role": "lead"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "FilterIterator implementation that filters files based on a list of suffixes.",
@@ -3458,8 +3508,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "lead",
-                    "role": "lead"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Simple template engine.",
@@ -3507,8 +3557,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "lead",
-                    "role": "lead"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Utility class for timing",
@@ -4524,8 +4574,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "lead",
-                    "role": "lead"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Collection of value objects that represent the types of the PHP type system",
@@ -4567,8 +4617,8 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
+                    "role": "lead",
-                    "role": "lead"
+                    "email": "sebastian@phpunit.de"
                 }
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
@@ -5518,19 +5568,19 @@
             "authors": [
                 {
                     "name": "Fabien Potencier",
+                    "role": "Lead Developer",
                     "email": "fabien@symfony.com",
-                    "homepage": "http://fabien.potencier.org",
+                    "homepage": "http://fabien.potencier.org"
-                    "role": "Lead Developer"
                 },
                 {
                     "name": "Armin Ronacher",
-                    "email": "armin.ronacher@active-4.com",
+                    "role": "Project Founder",
-                    "role": "Project Founder"
+                    "email": "armin.ronacher@active-4.com"
                 },
                 {
                     "name": "Twig Team",
-                    "homepage": "https://twig.symfony.com/contributors",
+                    "role": "Contributors",
-                    "role": "Contributors"
+                    "homepage": "https://twig.symfony.com/contributors"
                 }
             ],
             "description": "Twig, the flexible, fast, and secure template language for PHP",

plugins/RedisCache/RedisCachePlugin.php

@@ -0,0 +1,162 @@
+<?php
+
+/**
+ * GNU social - a federating social network
+ *
+ * Plguin inplementing Redis based caching
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Files
+ * @package   GNUsocial
+ * @author    Chimo
+ * @author    Miguel Dantas <biodantas@gmail.com>
+ * @copyright 2008-2009, 2019 Free Software Foundation http://fsf.org
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      https://www.gnu.org/software/social/
+ */
+
+defined('GNUSOCIAL') || die();
+
+class RedisCachePlugin extends Plugin
+{
+    const VERSION = '0.0.1';
+
+    private $client = null;
+    public $defaultExpiry = 86400; // 24h
+
+    function onInitializePlugin()
+    {
+        $this->_ensureConn();
+
+        return true;
+    }
+
+    private function _ensureConn()
+    {
+        if ($this->client === null) {
+            $connection = common_config('rediscache', 'connection');
+
+            $this->client = new Predis\Client($connection);
+        }
+    }
+
+    function onStartCacheGet(&$key, &$value)
+    {
+        // Temporary work-around upstream bug
+        // see: https://github.com/chimo/gs-rediscache/issues/1
+        if ($key === Cache::key('profileall')) {
+            return true;
+        }
+
+        try {
+            $this->_ensureConn();
+
+            $ret = $this->client->get($key);
+        } catch(\Predis\PredisException $Ex) {
+            common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
+
+            return true;
+        }
+
+        // Hit, overwrite "value" and return false
+        // to indicate we took care of this
+        if ($ret !== null) {
+            $value = unserialize($ret);
+
+            Event::handle('EndCacheGet', array($key, &$value));
+            return false;
+        }
+
+        // Miss, let GS do its thing
+        return true;
+    }
+
+    function onStartCacheSet(&$key, &$value, &$flag, &$expiry, &$success)
+    {
+        // Temporary work-around upstream bug
+        // see: https://github.com/chimo/gs-rediscache/issues/1
+        if ($key === Cache::key('profileall')) {
+            return true;
+        }
+
+        if ($expiry === null) {
+            $expiry = $this->defaultExpiry;
+        }
+
+        try {
+            $this->_ensureConn();
+
+            $ret = $this->client->setex($key, $expiry, serialize($value));
+        } catch(\Predis\PredisException $Ex) {
+            common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
+
+            return true;
+        }
+
+        if ($ret->getPayload() === "OK") {
+            $success = true;
+
+            Event::handle('EndCacheSet', array($key, $value, $flag, $expiry));
+
+            return false;
+        }
+
+        return true;
+    }
+
+    function onStartCacheDelete($key)
+    {
+        try {
+            $this->_ensureConn();
+
+            $this->client->del($key);
+        } catch(\Predis\PredisException $Ex) {
+            common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
+        }
+
+        // Let other Caches delete stuff if they want to
+        return true;
+    }
+
+    function onStartCacheIncrement(&$key, &$step, &$value)
+    {
+        try {
+            $this->_ensureConn();
+
+            // TODO: handle when this fails
+            $this->client->incrby($key, $step);
+        } catch(\Predis\PredisException $Ex) {
+            common_log(LOG_ERR, get_class($Ex) . ' ' . $Ex->getMessage());
+
+            return true;
+        }
+
+        Event::handle('EndCacheIncrement', array($key, $step, $value));
+
+        return false;
+    }
+
+    function onPluginVersion(array &$versions)
+    {
+        $versions[] = array('name' => 'RedisCache',
+                            'version' => self::VERSION,
+                            'author' => 'chimo',
+                            'homepage' => 'https://github.com/chimo/gs-rediscache',
+                            'description' =>
+                            // TRANS: Plugin description.
+                            _m('')); // TODO
+        return true;
+    }
+}

vendor/clue/stream-filter/.gitignore

@@ -0,0 +1,2 @@
+/vendor
+/composer.lock

vendor/clue/stream-filter/.travis.yml

@@ -0,0 +1,27 @@
+language: php
+
+php:
+# - 5.3 # requires old distro, see below
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - 7.1
+  - 7.2
+  - hhvm # ignore errors, see below
+
+# lock distro so new future defaults will not break the build
+dist: trusty
+
+matrix:
+  include:
+    - php: 5.3
+      dist: precise
+  allow_failures:
+    - php: hhvm
+
+install:
+  - composer install --no-interaction
+
+script:
+  - vendor/bin/phpunit --coverage-text

vendor/clue/stream-filter/CHANGELOG.md

@@ -0,0 +1,63 @@
+# Changelog
+
+## 1.4.1 (2019-04-09)
+
+*   Fix: Check if the function is declared before declaring it.
+    (#23 by @Niko9911)
+
+*   Improve test suite to also test against PHP 7.2 and
+    add test for base64 encoding and decoding filters.
+    (#22 by @arubacao and #25 by @Nyholm and @clue)
+
+## 1.4.0 (2017-08-18)
+
+*   Feature / Fix: The `fun()` function does not pass filter parameter `null`
+    to underlying `stream_filter_append()` by default
+    (#15 by @Nyholm)
+
+    Certain filters (such as `convert.quoted-printable-encode`) do not accept
+    a filter parameter at all. If no explicit filter parameter is given, we no
+    longer pass a default `null` value.
+
+    ```php
+    $encode = Filter\fun('convert.quoted-printable-encode');
+    assert('t=C3=A4st' === $encode('täst'));
+    ```
+
+*   Add examples and improve documentation
+    (#13 and #20 by @clue and #18 by @Nyholm)
+
+*   Improve test suite by adding PHPUnit to require-dev,
+    fix HHVM build for now again and ignore future HHVM build errors,
+    lock Travis distro so new future defaults will not break the build
+    and test on PHP 7.1
+    (#12, #14 and #19 by @clue and #16 by @Nyholm)
+
+## 1.3.0 (2015-11-08)
+
+*   Feature: Support accessing built-in filters as callbacks
+    (#5 by @clue)
+
+    ```php
+    $fun = Filter\fun('zlib.deflate');
+
+    $ret = $fun('hello') . $fun('world') . $fun();
+    assert('helloworld' === gzinflate($ret));
+    ```
+
+## 1.2.0 (2015-10-23)
+
+* Feature: Invoke close event when closing filter (flush buffer)
+  (#9 by @clue)
+
+## 1.1.0 (2015-10-22)
+
+* Feature: Abort filter operation when catching an Exception
+  (#10 by @clue)
+
+* Feature: Additional safeguards to prevent filter state corruption
+  (#7 by @clue)
+
+## 1.0.0 (2015-10-18)
+
+* First tagged release

vendor/clue/stream-filter/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Christian Lück
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/clue/stream-filter/README.md

@@ -0,0 +1,301 @@
+# clue/stream-filter [![Build Status](https://travis-ci.org/clue/php-stream-filter.svg?branch=master)](https://travis-ci.org/clue/php-stream-filter)
+
+A simple and modern approach to stream filtering in PHP
+
+**Table of contents**
+
+* [Why?](#why)
+* [Usage](#usage)
+  * [append()](#append)
+  * [prepend()](#prepend)
+  * [fun()](#fun)
+  * [remove()](#remove)
+* [Install](#install)
+* [Tests](#tests)
+* [License](#license)
+
+## Why?
+
+PHP's stream filtering system is great!
+
+It offers very powerful stream filtering options and comes with a useful set of built-in filters.
+These filters can be used to easily and efficiently perform various transformations on-the-fly, such as:
+
+* read from a gzip'ed input file,
+* transcode from ISO-8859-1 (Latin1) to UTF-8,
+* write to a bzip output file
+* and much more.
+
+But let's face it:
+Its API is [*difficult to work with*](https://www.php.net/manual/en/php-user-filter.filter.php)
+and its documentation is [*subpar*](https://stackoverflow.com/questions/27103269/what-is-a-bucket-brigade).
+This combined means its powerful features are often neglected.
+
+This project aims to make these features more accessible to a broader audience.
+* **Lightweight, SOLID design** -
+  Provides a thin abstraction that is [*just good enough*](https://en.wikipedia.org/wiki/Principle_of_good_enough)
+  and does not get in your way.
+  Custom filters require trivial effort.
+* **Good test coverage** -
+  Comes with an automated tests suite and is regularly tested in the *real world*
+
+## Usage
+
+This lightweight library consists only of a few simple functions.
+All functions reside under the `Clue\StreamFilter` namespace.
+
+The below examples assume you use an import statement similar to this:
+
+```php
+use Clue\StreamFilter as Filter;
+
+Filter\append(…);
+```
+
+Alternatively, you can also refer to them with their fully-qualified name:
+
+```php
+\Clue\StreamFilter\append(…);
+```
+
+### append()
+
+The `append($stream, $callback, $read_write = STREAM_FILTER_ALL)` function can be used to
+append a filter callback to the given stream.
+
+Each stream can have a list of filters attached.
+This function appends a filter to the end of this list.
+
+This function returns a filter resource which can be passed to [`remove()`](#remove).
+If the given filter can not be added, it throws an `Exception`.
+
+The `$stream` can be any valid stream resource, such as:
+
+```php
+$stream = fopen('demo.txt', 'w+');
+```
+
+The `$callback` should be a valid callable function which accepts an individual chunk of data
+and should return the updated chunk:
+
+```php
+$filter = Filter\append($stream, function ($chunk) {
+    // will be called each time you read or write a $chunk to/from the stream
+    return $chunk;
+});
+```
+
+As such, you can also use native PHP functions or any other `callable`:
+
+```php
+Filter\append($stream, 'strtoupper');
+
+// will write "HELLO" to the underlying stream
+fwrite($stream, 'hello');
+```
+
+If the `$callback` accepts invocation without parameters, then this signature
+will be invoked once ending (flushing) the filter:
+
+```php
+Filter\append($stream, function ($chunk = null) {
+    if ($chunk === null) {
+        // will be called once ending the filter
+        return 'end';
+    }
+    // will be called each time you read or write a $chunk to/from the stream
+    return $chunk;
+});
+
+fclose($stream);
+```
+
+> Note: Legacy PHP versions (PHP < 5.4) do not support passing additional data
+from the end signal handler if the stream is being closed.
+
+If your callback throws an `Exception`, then the filter process will be aborted.
+In order to play nice with PHP's stream handling, the `Exception` will be
+transformed to a PHP warning instead:
+
+```php
+Filter\append($stream, function ($chunk) {
+    throw new \RuntimeException('Unexpected chunk');
+});
+
+// raises an E_USER_WARNING with "Error invoking filter: Unexpected chunk"
+fwrite($stream, 'hello');
+```
+
+The optional `$read_write` parameter can be used to only invoke the `$callback` when either writing to the stream or only when reading from the stream:
+
+```php
+Filter\append($stream, function ($chunk) {
+    // will be called each time you write to the stream
+    return $chunk;
+}, STREAM_FILTER_WRITE);
+
+Filter\append($stream, function ($chunk) {
+    // will be called each time you read from the stream
+    return $chunk;
+}, STREAM_FILTER_READ);
+```
+
+> Note that once a filter has been added to stream, the stream can no longer be passed to
+> [`stream_select()`](https://www.php.net/manual/en/function.stream-select.php)
+> (and family).
+>
+> > Warning: stream_select(): cannot cast a filtered stream on this system in {file} on line {line}
+>
+> This is due to limitations of PHP's stream filter support, as it can no longer reliably
+> tell when the underlying stream resource is actually ready.
+> As an alternative, consider calling `stream_select()` on the unfiltered stream and
+> then pass the unfiltered data through the [`fun()`](#fun) function.
+
+### prepend()
+
+The `prepend($stream, $callback, $read_write = STREAM_FILTER_ALL)` function can be used to
+prepend a filter callback to the given stream.
+
+Each stream can have a list of filters attached.
+This function prepends a filter to the start of this list.
+
+This function returns a filter resource which can be passed to [`remove()`](#remove).
+If the given filter can not be added, it throws an `Exception`.
+
+```php
+$filter = Filter\prepend($stream, function ($chunk) {
+    // will be called each time you read or write a $chunk to/from the stream
+    return $chunk;
+});
+```
+
+Except for the position in the list of filters, this function behaves exactly
+like the [`append()`](#append) function.
+For more details about its behavior, see also the [`append()`](#append) function.
+
+### fun()
+
+The `fun($filter, $parameters = null)` function can be used to
+create a filter function which uses the given built-in `$filter`.
+
+PHP comes with a useful set of [built-in filters](https://www.php.net/manual/en/filters.php).
+Using `fun()` makes accessing these as easy as passing an input string to filter
+and getting the filtered output string.
+
+```php
+$fun = Filter\fun('string.rot13');
+
+assert('grfg' === $fun('test'));
+assert('test' === $fun($fun('test'));
+```
+
+Please note that not all filter functions may be available depending on installed
+PHP extensions and the PHP version in use.
+In particular, [HHVM](https://hhvm.com/) may not offer the same filter functions
+or parameters as Zend PHP.
+Accessing an unknown filter function will result in a `RuntimeException`:
+
+```php
+Filter\fun('unknown'); // throws RuntimeException
+```
+
+Some filters may accept or require additional filter parameters – most
+filters do not require filter parameters.
+If given, the optional `$parameters` argument will be passed to the
+underlying filter handler as-is.
+In particular, note how *not passing* this parameter at all differs from
+explicitly passing a `null` value (which many filters do not accept).
+Please refer to the individual filter definition for more details.
+For example, the `string.strip_tags` filter can be invoked like this:
+
+```php
+$fun = Filter\fun('string.strip_tags', '<a><b>');
+
+$ret = $fun('<b>h<br>i</b>');
+assert('<b>hi</b>' === $ret);
+```
+
+Under the hood, this function allocates a temporary memory stream, so it's
+recommended to clean up the filter function after use.
+Also, some filter functions (in particular the
+[zlib compression filters](https://www.php.net/manual/en/filters.compression.php))
+may use internal buffers and may emit a final data chunk on close.
+The filter function can be closed by invoking without any arguments:
+
+```php
+$fun = Filter\fun('zlib.deflate');
+
+$ret = $fun('hello') . $fun('world') . $fun();
+assert('helloworld' === gzinflate($ret));
+```
+
+The filter function must not be used anymore after it has been closed.
+Doing so will result in a `RuntimeException`:
+
+```php
+$fun = Filter\fun('string.rot13');
+$fun();
+
+$fun('test'); // throws RuntimeException
+```
+
+> Note: If you're using the zlib compression filters, then you should be wary
+about engine inconsistencies between different PHP versions and HHVM.
+These inconsistencies exist in the underlying PHP engines and there's little we
+can do about this in this library.
+[Our test suite](tests/) contains several test cases that exhibit these issues.
+If you feel some test case is missing or outdated, we're happy to accept PRs! :)
+
+### remove()
+
+The `remove($filter)` function can be used to
+remove a filter previously added via [`append()`](#append) or [`prepend()`](#prepend).
+
+```php
+$filter = Filter\append($stream, function () {
+    // …
+});
+Filter\remove($filter);
+```
+
+## Install
+
+The recommended way to install this library is [through Composer](https://getcomposer.org).
+[New to Composer?](https://getcomposer.org/doc/00-intro.md)
+
+This project follows [SemVer](https://semver.org/).
+This will install the latest supported version:
+
+```bash
+$ composer require clue/stream-filter:^1.4.1
+```
+
+See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
+
+This project aims to run on any platform and thus does not require any PHP
+extensions and supports running on legacy PHP 5.3 through current PHP 7+ and
+HHVM.
+It's *highly recommended to use PHP 7+* for this project.
+Older PHP versions may suffer from a number of inconsistencies documented above.
+
+## Tests
+
+To run the test suite, you first need to clone this repo and then install all
+dependencies [through Composer](https://getcomposer.org):
+
+```bash
+$ composer install
+```
+
+To run the test suite, go to the project root and run:
+
+```bash
+$ php vendor/bin/phpunit
+```
+
+## License
+
+This project is released under the permissive [MIT license](LICENSE).
+
+> Did you know that I offer custom development services and issuing invoices for
+  sponsorships of releases and for contributions? Contact me (@clue) for details.

vendor/clue/stream-filter/composer.json

@@ -0,0 +1,23 @@
+{
+    "name": "clue/stream-filter",
+    "description": "A simple and modern approach to stream filtering in PHP",
+    "keywords": ["stream", "callback", "filter", "php_user_filter", "stream_filter_append", "stream_filter_register", "bucket brigade"],
+    "homepage": "https://github.com/clue/php-stream-filter",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Christian Lück",
+            "email": "christian@lueck.tv"
+        }
+    ],
+    "require": {
+        "php": ">=5.3"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^5.0 || ^4.8"
+    },
+    "autoload": {
+        "psr-4": { "Clue\\StreamFilter\\": "src/" },
+        "files": [ "src/functions_include.php" ]
+    }
+}

vendor/clue/stream-filter/examples/base64_decode.php

@@ -0,0 +1,29 @@
+<?php
+
+// $ echo test | php examples/base64_encode.php | php examples/base64_decode.php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+// decoding requires buffering in chunks of 4 bytes each
+$buffer = '';
+Clue\StreamFilter\append(STDIN, function ($chunk = null) use (&$buffer) {
+    if ($chunk === null) {
+        if (strlen($buffer) % 4 !== 0) {
+            throw new \UnexpectedValueException('Invalid length');
+        }
+        $chunk = $buffer;
+    } else {
+        $buffer .= $chunk;
+        $len = strlen($buffer) - (strlen($buffer) % 4);
+        $chunk = (string)substr($buffer, 0, $len);
+        $buffer = (string)substr($buffer, $len);
+    }
+
+    $ret = base64_decode($chunk, true);
+    if ($ret === false) {
+        throw new \UnexpectedValueException('Not a valid base64 encoded chunk');
+    }
+    return $ret;
+}, STREAM_FILTER_READ);
+
+fpassthru(STDIN);

vendor/clue/stream-filter/examples/base64_encode.php

@@ -0,0 +1,21 @@
+<?php
+
+// $ echo test | php examples/base64_encode.php | base64 --decode
+
+require __DIR__ . '/../vendor/autoload.php';
+
+// encoding requires buffering in chunks of 3 bytes each
+$buffer = '';
+Clue\StreamFilter\append(STDIN, function ($chunk = null) use (&$buffer) {
+    if ($chunk === null) {
+        return base64_encode($buffer);
+    }
+    $buffer .= $chunk;
+    $len = strlen($buffer) - (strlen($buffer) % 3);
+    $chunk = substr($buffer, 0, $len);
+    $buffer = substr($buffer, $len);
+
+    return base64_encode($chunk);
+}, STREAM_FILTER_READ);
+
+fpassthru(STDIN);

vendor/clue/stream-filter/examples/uppercase.php

@@ -0,0 +1,9 @@
+<?php
+
+// $ echo test | php examples/uppercase.php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+Clue\StreamFilter\append(STDIN, 'strtoupper');
+
+fpassthru(STDIN);

vendor/clue/stream-filter/phpunit.xml.dist

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit bootstrap="vendor/autoload.php"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+>
+    <testsuites>
+        <testsuite>
+            <directory>./tests/</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory>./src/</directory>
+        </whitelist>
+    </filter>
+</phpunit>

vendor/clue/stream-filter/src/CallbackFilter.php

@@ -0,0 +1,120 @@
+<?php
+
+namespace Clue\StreamFilter;
+
+use php_user_filter;
+use InvalidArgumentException;
+use ReflectionFunction;
+use Exception;
+
+/**
+ *
+ * @internal
+ * @see append()
+ * @see prepend()
+ */
+class CallbackFilter extends php_user_filter
+{
+    private $callback;
+    private $closed = true;
+    private $supportsClose = false;
+
+    public function onCreate()
+    {
+        $this->closed = false;
+
+        if (!is_callable($this->params)) {
+            throw new InvalidArgumentException('No valid callback parameter given to stream_filter_(append|prepend)');
+        }
+        $this->callback = $this->params;
+
+        // callback supports end event if it accepts invocation without arguments
+        $ref = new ReflectionFunction($this->callback);
+        $this->supportsClose = ($ref->getNumberOfRequiredParameters() === 0);
+
+        return true;
+    }
+
+    public function onClose()
+    {
+        $this->closed = true;
+
+        // callback supports closing and is not already closed
+        if ($this->supportsClose) {
+            $this->supportsClose = false;
+            // invoke without argument to signal end and discard resulting buffer
+            try {
+                call_user_func($this->callback);
+            } catch (Exception $ignored) {
+                // this might be called during engine shutdown, so it's not safe
+                // to raise any errors or exceptions here
+                // trigger_error('Error closing filter: ' . $ignored->getMessage(), E_USER_WARNING);
+            }
+        }
+
+        $this->callback = null;
+    }
+
+    public function filter($in, $out, &$consumed, $closing)
+    {
+        // concatenate whole buffer from input brigade
+        $data = '';
+        while ($bucket = stream_bucket_make_writeable($in)) {
+            $consumed += $bucket->datalen;
+            $data .= $bucket->data;
+        }
+
+        // skip processing callback that already ended
+        if ($this->closed) {
+            return PSFS_FEED_ME;
+        }
+
+        // only invoke filter function if buffer is not empty
+        // this may skip flushing a closing filter
+        if ($data !== '') {
+            try {
+                $data = call_user_func($this->callback, $data);
+            } catch (Exception $e) {
+                // exception should mark filter as closed
+                $this->onClose();
+                trigger_error('Error invoking filter: ' . $e->getMessage(), E_USER_WARNING);
+
+                return PSFS_ERR_FATAL;
+            }
+        }
+
+        // mark filter as closed after processing closing chunk
+        if ($closing) {
+            $this->closed = true;
+
+            // callback supports closing and is not already closed
+            if ($this->supportsClose) {
+                $this->supportsClose = false;
+
+                // invoke without argument to signal end and append resulting buffer
+                try {
+                    $data .= call_user_func($this->callback);
+                } catch (Exception $e) {
+                    trigger_error('Error ending filter: ' . $e->getMessage(), E_USER_WARNING);
+
+                    return PSFS_ERR_FATAL;
+                }
+            }
+        }
+
+        if ($data !== '') {
+            // create a new bucket for writing the resulting buffer to the output brigade
+            // reusing an existing bucket turned out to be bugged in some environments (ancient PHP versions and HHVM)
+            $bucket = @stream_bucket_new($this->stream, $data);
+
+            // legacy PHP versions (PHP < 5.4) do not support passing data from the event signal handler
+            // because closing the stream invalidates the stream and its stream bucket brigade before
+            // invoking the filter close handler.
+            if ($bucket !== false) {
+                stream_bucket_append($out, $bucket);
+            }
+        }
+
+        return PSFS_PASS_ON;
+    }
+}

vendor/clue/stream-filter/src/functions.php

@@ -0,0 +1,146 @@
+<?php
+
+namespace Clue\StreamFilter;
+
+use RuntimeException;
+
+/**
+ * append a callback filter to the given stream
+ *
+ * @param resource $stream
+ * @param callable $callback
+ * @param int $read_write
+ * @return resource filter resource which can be used for `remove()`
+ * @throws Exception on error
+ * @uses stream_filter_append()
+ */
+function append($stream, $callback, $read_write = STREAM_FILTER_ALL)
+{
+    $ret = @stream_filter_append($stream, register(), $read_write, $callback);
+
+    if ($ret === false) {
+        $error = error_get_last() + array('message' => '');
+        throw new RuntimeException('Unable to append filter: ' . $error['message']);
+    }
+
+    return $ret;
+}
+
+/**
+ * prepend a callback filter to the given stream
+ *
+ * @param resource $stream
+ * @param callable $callback
+ * @param int $read_write
+ * @return resource filter resource which can be used for `remove()`
+ * @throws Exception on error
+ * @uses stream_filter_prepend()
+ */
+function prepend($stream, $callback, $read_write = STREAM_FILTER_ALL)
+{
+    $ret = @stream_filter_prepend($stream, register(), $read_write, $callback);
+
+    if ($ret === false) {
+        $error = error_get_last() + array('message' => '');
+        throw new RuntimeException('Unable to prepend filter: ' . $error['message']);
+    }
+
+    return $ret;
+}
+
+/**
+ * Creates filter fun (function) which uses the given built-in $filter
+ *
+ * Some filters may accept or require additional filter parameters – most
+ * filters do not require filter parameters.
+ * If given, the optional `$parameters` argument will be passed to the
+ * underlying filter handler as-is.
+ * In particular, note how *not passing* this parameter at all differs from
+ * explicitly passing a `null` value (which many filters do not accept).
+ * Please refer to the individual filter definition for more details.
+ *
+ * @param string $filter     built-in filter name. See stream_get_filters() or http://php.net/manual/en/filters.php
+ * @param mixed  $parameters (optional) parameters to pass to the built-in filter as-is
+ * @return callable a filter callback which can be append()'ed or prepend()'ed
+ * @throws RuntimeException on error
+ * @link http://php.net/manual/en/filters.php
+ * @see stream_get_filters()
+ * @see append()
+ */
+function fun($filter, $parameters = null)
+{
+    $fp = fopen('php://memory', 'w');
+    if (func_num_args() === 1) {
+        $filter = @stream_filter_append($fp, $filter, STREAM_FILTER_WRITE);
+    } else {
+        $filter = @stream_filter_append($fp, $filter, STREAM_FILTER_WRITE, $parameters);
+    }
+
+    if ($filter === false) {
+        fclose($fp);
+        $error = error_get_last() + array('message' => '');
+        throw new RuntimeException('Unable to access built-in filter: ' . $error['message']);
+    }
+
+    // append filter function which buffers internally
+    $buffer = '';
+    append($fp, function ($chunk) use (&$buffer) {
+        $buffer .= $chunk;
+
+        // always return empty string in order to skip actually writing to stream resource
+        return '';
+    }, STREAM_FILTER_WRITE);
+
+    $closed = false;
+
+    return function ($chunk = null) use ($fp, $filter, &$buffer, &$closed) {
+        if ($closed) {
+            throw new \RuntimeException('Unable to perform operation on closed stream');
+        }
+        if ($chunk === null) {
+            $closed = true;
+            $buffer = '';
+            fclose($fp);
+            return $buffer;
+        }
+        // initialize buffer and invoke filters by attempting to write to stream
+        $buffer = '';
+        fwrite($fp, $chunk);
+
+        // buffer now contains everything the filter function returned
+        return $buffer;
+    };
+}
+
+/**
+ * remove a callback filter from the given stream
+ *
+ * @param resource $filter
+ * @return boolean true on success or false on error
+ * @throws Exception on error
+ * @uses stream_filter_remove()
+ */
+function remove($filter)
+{
+    if (@stream_filter_remove($filter) === false) {
+        throw new RuntimeException('Unable to remove given filter');
+    }
+}
+
+/**
+ * registers the callback filter and returns the resulting filter name
+ *
+ * There should be little reason to call this function manually.
+ *
+ * @return string filter name
+ * @uses CallbackFilter
+ */
+function register()
+{
+    static $registered = null;
+    if ($registered === null) {
+        $registered = 'stream-callback';
+        stream_filter_register($registered, __NAMESPACE__ . '\CallbackFilter');
+    }
+    return $registered;
+}

vendor/clue/stream-filter/src/functions_include.php

@@ -0,0 +1,5 @@
+<?php
+
+if (!function_exists('Clue\\StreamFilter\\append')) {
+    require __DIR__ . '/functions.php';
+}

vendor/clue/stream-filter/tests/FilterTest.php

@@ -0,0 +1,386 @@
+<?php
+
+use Clue\StreamFilter;
+
+class FilterTest extends PHPUnit_Framework_TestCase
+{
+    public function testAppendSimpleCallback()
+    {
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, function ($chunk) {
+            return strtoupper($chunk);
+        });
+
+        fwrite($stream, 'hello');
+        fwrite($stream, 'world');
+        rewind($stream);
+
+        $this->assertEquals('HELLOWORLD', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendNativePhpFunction()
+    {
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, 'strtoupper');
+
+        fwrite($stream, 'hello');
+        fwrite($stream, 'world');
+        rewind($stream);
+
+        $this->assertEquals('HELLOWORLD', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendChangingChunkSize()
+    {
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, function ($chunk) {
+            return str_replace(array('a','e','i','o','u'), '', $chunk);
+        });
+
+        fwrite($stream, 'hello');
+        fwrite($stream, 'world');
+        rewind($stream);
+
+        $this->assertEquals('hllwrld', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendReturningEmptyStringWillNotPassThrough()
+    {
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, function ($chunk) {
+            return '';
+        });
+
+        fwrite($stream, 'hello');
+        fwrite($stream, 'world');
+        rewind($stream);
+
+        $this->assertEquals('', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendEndEventCanBeBufferedOnClose()
+    {
+        if (PHP_VERSION < 5.4) $this->markTestSkipped('Not supported on legacy PHP');
+
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, function ($chunk = null) {
+            if ($chunk === null) {
+                // this signals the end event
+                return '!';
+            }
+            return $chunk . ' ';
+        }, STREAM_FILTER_WRITE);
+
+        $buffered = '';
+        StreamFilter\append($stream, function ($chunk) use (&$buffered) {
+            $buffered .= $chunk;
+            return '';
+        });
+
+        fwrite($stream, 'hello');
+        fwrite($stream, 'world');
+
+        fclose($stream);
+
+        $this->assertEquals('hello world !', $buffered);
+    }
+
+    public function testAppendEndEventWillBeCalledOnRemove()
+    {
+        $stream = $this->createStream();
+
+        $ended = false;
+        $filter = StreamFilter\append($stream, function ($chunk = null) use (&$ended) {
+            if ($chunk === null) {
+                $ended = true;
+            }
+            return $chunk;
+        }, STREAM_FILTER_WRITE);
+
+        $this->assertEquals(0, $ended);
+        StreamFilter\remove($filter);
+        $this->assertEquals(1, $ended);
+    }
+
+    public function testAppendEndEventWillBeCalledOnClose()
+    {
+        $stream = $this->createStream();
+
+        $ended = false;
+        StreamFilter\append($stream, function ($chunk = null) use (&$ended) {
+            if ($chunk === null) {
+                $ended = true;
+            }
+            return $chunk;
+        }, STREAM_FILTER_WRITE);
+
+        $this->assertEquals(0, $ended);
+        fclose($stream);
+        $this->assertEquals(1, $ended);
+    }
+
+    public function testAppendWriteOnly()
+    {
+        $stream = $this->createStream();
+
+        $invoked = 0;
+
+        StreamFilter\append($stream, function ($chunk) use (&$invoked) {
+            ++$invoked;
+
+            return $chunk;
+        }, STREAM_FILTER_WRITE);
+
+        fwrite($stream, 'a');
+        fwrite($stream, 'b');
+        fwrite($stream, 'c');
+        rewind($stream);
+
+        $this->assertEquals(3, $invoked);
+        $this->assertEquals('abc', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendReadOnly()
+    {
+        $stream = $this->createStream();
+
+        $invoked = 0;
+
+        StreamFilter\append($stream, function ($chunk) use (&$invoked) {
+            ++$invoked;
+
+            return $chunk;
+        }, STREAM_FILTER_READ);
+
+        fwrite($stream, 'a');
+        fwrite($stream, 'b');
+        fwrite($stream, 'c');
+        rewind($stream);
+
+        $this->assertEquals(0, $invoked);
+        $this->assertEquals('abc', stream_get_contents($stream));
+        $this->assertEquals(1, $invoked);
+
+        fclose($stream);
+    }
+
+    public function testOrderCallingAppendAfterPrepend()
+    {
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, function ($chunk) {
+            return '[' . $chunk . ']';
+        }, STREAM_FILTER_WRITE);
+
+        StreamFilter\prepend($stream, function ($chunk) {
+            return '(' . $chunk . ')';
+        }, STREAM_FILTER_WRITE);
+
+        fwrite($stream, 'hello');
+        rewind($stream);
+
+        $this->assertEquals('[(hello)]', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testRemoveFilter()
+    {
+        $stream = $this->createStream();
+
+        $first = StreamFilter\append($stream, function ($chunk) {
+            return $chunk . '?';
+        }, STREAM_FILTER_WRITE);
+
+        StreamFilter\append($stream, function ($chunk) {
+            return $chunk . '!';
+        }, STREAM_FILTER_WRITE);
+
+        StreamFilter\remove($first);
+
+        fwrite($stream, 'hello');
+        rewind($stream);
+
+        $this->assertEquals('hello!', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendFunDechunk()
+    {
+        if (defined('HHVM_VERSION')) $this->markTestSkipped('Not supported on HHVM (dechunk filter does not exist)');
+
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, StreamFilter\fun('dechunk'), STREAM_FILTER_WRITE);
+
+        fwrite($stream, "2\r\nhe\r\n");
+        fwrite($stream, "3\r\nllo\r\n");
+        fwrite($stream, "0\r\n\r\n");
+        rewind($stream);
+
+        $this->assertEquals('hello', stream_get_contents($stream));
+
+        fclose($stream);
+    }
+
+    public function testAppendThrows()
+    {
+        $this->createErrorHandler($errors);
+
+        $stream = $this->createStream();
+        $this->createErrorHandler($errors);
+
+        StreamFilter\append($stream, function ($chunk) {
+            throw new \DomainException($chunk);
+        });
+
+        fwrite($stream, 'test');
+
+        $this->removeErrorHandler();
+        $this->assertCount(1, $errors);
+        $this->assertContains('test', $errors[0]);
+    }
+
+    public function testAppendThrowsDuringEnd()
+    {
+        $stream = $this->createStream();
+        $this->createErrorHandler($errors);
+
+        StreamFilter\append($stream, function ($chunk = null) {
+            if ($chunk === null) {
+                throw new \DomainException('end');
+            }
+            return $chunk;
+        });
+
+        fclose($stream);
+
+        $this->removeErrorHandler();
+
+        // We can only assert we're not seeing an exception here…
+        // * php 5.3-5.6 sees one error here
+        // * php 7 does not see any error here
+        // * hhvm sees the same error twice
+        //
+        // If you're curious:
+        //
+        // var_dump($errors);
+        // $this->assertCount(1, $errors);
+        // $this->assertContains('end', $errors[0]);
+    }
+
+    public function testAppendThrowsShouldTriggerEnd()
+    {
+        $stream = $this->createStream();
+        $this->createErrorHandler($errors);
+
+        $ended = false;
+        StreamFilter\append($stream, function ($chunk = null) use (&$ended) {
+            if ($chunk === null) {
+                $ended = true;
+                return '';
+            }
+            throw new \DomainException($chunk);
+        });
+
+        $this->assertEquals(false, $ended);
+        fwrite($stream, 'test');
+        $this->assertEquals(true, $ended);
+
+        $this->removeErrorHandler();
+        $this->assertCount(1, $errors);
+        $this->assertContains('test', $errors[0]);
+    }
+
+    public function testAppendThrowsShouldTriggerEndButIgnoreExceptionDuringEnd()
+    {
+        //$this->markTestIncomplete();
+        $stream = $this->createStream();
+        $this->createErrorHandler($errors);
+
+        StreamFilter\append($stream, function ($chunk = null) {
+            if ($chunk === null) {
+                $chunk = 'end';
+                //return '';
+            }
+            throw new \DomainException($chunk);
+        });
+
+        fwrite($stream, 'test');
+
+        $this->removeErrorHandler();
+        $this->assertCount(1, $errors);
+        $this->assertContains('test', $errors[0]);
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testAppendInvalidStreamIsRuntimeError()
+    {
+        if (defined('HHVM_VERSION')) $this->markTestSkipped('Not supported on HHVM (does not reject invalid stream)');
+        StreamFilter\append(false, function () { });
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testPrependInvalidStreamIsRuntimeError()
+    {
+        if (defined('HHVM_VERSION')) $this->markTestSkipped('Not supported on HHVM (does not reject invalid stream)');
+        StreamFilter\prepend(false, function () { });
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testRemoveInvalidFilterIsRuntimeError()
+    {
+        if (defined('HHVM_VERSION')) $this->markTestSkipped('Not supported on HHVM (does not reject invalid filters)');
+        StreamFilter\remove(false);
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testInvalidCallbackIsInvalidArgument()
+    {
+        $stream = $this->createStream();
+
+        StreamFilter\append($stream, 'a-b-c');
+    }
+
+    private function createStream()
+    {
+        return fopen('php://memory', 'r+');
+    }
+
+    private function createErrorHandler(&$errors)
+    {
+        $errors = array();
+        set_error_handler(function ($_, $message) use (&$errors) {
+            $errors []= $message;
+        });
+    }
+
+    private function removeErrorHandler()
+    {
+        restore_error_handler();
+    }
+}

vendor/clue/stream-filter/tests/FunTest.php

@@ -0,0 +1,61 @@
+<?php
+
+use Clue\StreamFilter as Filter;
+
+class FunTest extends PHPUnit_Framework_TestCase
+{
+    public function testFunInRot13()
+    {
+        $rot = Filter\fun('string.rot13');
+
+        $this->assertEquals('grfg', $rot('test'));
+        $this->assertEquals('test', $rot($rot('test')));
+        $this->assertEquals(null, $rot());
+    }
+
+    public function testFunInQuotedPrintable()
+    {
+        $encode = Filter\fun('convert.quoted-printable-encode');
+        $decode = Filter\fun('convert.quoted-printable-decode');
+
+        $this->assertEquals('t=C3=A4st', $encode('täst'));
+        $this->assertEquals('täst', $decode($encode('täst')));
+        $this->assertEquals(null, $encode());
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testFunWriteAfterCloseRot13()
+    {
+        $rot = Filter\fun('string.rot13');
+
+        $this->assertEquals(null, $rot());
+        $rot('test');
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testFunInvalid()
+    {
+        Filter\fun('unknown');
+    }
+
+    public function testFunInBase64()
+    {
+        $encode = Filter\fun('convert.base64-encode');
+        $decode = Filter\fun('convert.base64-decode');
+
+        $string = 'test';
+        $this->assertEquals(base64_encode($string), $encode($string) . $encode());
+        $this->assertEquals($string, $decode(base64_encode($string)));
+
+        $encode = Filter\fun('convert.base64-encode');
+        $decode = Filter\fun('convert.base64-decode');
+        $this->assertEquals($string, $decode($encode($string) . $encode()));
+
+        $encode = Filter\fun('convert.base64-encode');
+        $this->assertEquals(null, $encode());
+    }
+}

vendor/clue/stream-filter/tests/FunZlibTest.php

@@ -0,0 +1,79 @@
+<?php
+
+use Clue\StreamFilter;
+
+class BuiltInZlibTest extends PHPUnit_Framework_TestCase
+{
+    public function testFunZlibDeflateHelloWorld()
+    {
+        $deflate = StreamFilter\fun('zlib.deflate');
+
+        $data = $deflate('hello') . $deflate(' ') . $deflate('world') . $deflate();
+
+        $this->assertEquals(gzdeflate('hello world'), $data);
+    }
+
+    public function testFunZlibDeflateEmpty()
+    {
+        if (PHP_VERSION >= 7) $this->markTestSkipped('Not supported on PHP7 (empty string does not invoke filter)');
+
+        $deflate = StreamFilter\fun('zlib.deflate');
+
+        //$data = gzdeflate('');
+        $data = $deflate();
+
+        $this->assertEquals("\x03\x00", $data);
+    }
+
+    public function testFunZlibDeflateBig()
+    {
+        $deflate = StreamFilter\fun('zlib.deflate');
+
+        $n = 1000;
+        $expected = str_repeat('hello', $n);
+
+        $bytes = '';
+        for ($i = 0; $i < $n; ++$i) {
+            $bytes .= $deflate('hello');
+        }
+        $bytes .= $deflate();
+
+        $this->assertEquals($expected, gzinflate($bytes));
+    }
+
+    public function testFunZlibInflateHelloWorld()
+    {
+        $inflate = StreamFilter\fun('zlib.inflate');
+
+        $data = $inflate(gzdeflate('hello world')) . $inflate();
+
+        $this->assertEquals('hello world', $data);
+    }
+
+    public function testFunZlibInflateEmpty()
+    {
+        $inflate = StreamFilter\fun('zlib.inflate');
+
+        $data = $inflate("\x03\x00") . $inflate();
+
+        $this->assertEquals('', $data);
+    }
+
+    public function testFunZlibInflateBig()
+    {
+        if (defined('HHVM_VERSION')) $this->markTestSkipped('Not supported on HHVM (final chunk will not be emitted)');
+
+        $inflate = StreamFilter\fun('zlib.inflate');
+
+        $expected = str_repeat('hello', 10);
+        $bytes = gzdeflate($expected);
+
+        $ret = '';
+        foreach (str_split($bytes, 2) as $chunk) {
+            $ret .= $inflate($chunk);
+        }
+        $ret .= $inflate();
+
+        $this->assertEquals($expected, $ret);
+    }
+}

vendor/composer/LICENSE

@@ -1,52 +1,16 @@
-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: Composer
-Upstream-Contact: Jordi Boggiano <j.boggiano@seld.be>
-Source: https://github.com/composer/composer
 
-Files: *
+Copyright (c) Nils Adermann, Jordi Boggiano
-Copyright: 2016, Nils Adermann <naderman@naderman.de>
-           2016, Jordi Boggiano <j.boggiano@seld.be>
-License: Expat
 
-Files: src/Composer/Util/TlsHelper.php
-Copyright: 2016, Nils Adermann <naderman@naderman.de>
-           2016, Jordi Boggiano <j.boggiano@seld.be>
-           2013, Evan Coury <me@evancoury.com>
-License: Expat and BSD-2-Clause
-
-License: BSD-2-Clause
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
- .
-     * Redistributions of source code must retain the above copyright notice,
-       this list of conditions and the following disclaimer.
- .
-     * Redistributions in binary form must reproduce the above copyright notice,
-       this list of conditions and the following disclaimer in the documentation
-       and/or other materials provided with the distribution.
- .
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
- ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-License: Expat
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is furnished
 to do so, subject to the following conditions:
- .
+
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
- .
+
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ -54,3 +18,4 @@ License: Expat
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
+

vendor/composer/autoload_classmap.php

@@ -684,6 +684,277 @@ return array(
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     'ParagonIE\\ConstantTime\\Hex' => $vendorDir . '/paragonie/constant_time_encoding/src/Hex.php',
     'ParagonIE\\ConstantTime\\RFC4648' => $vendorDir . '/paragonie/constant_time_encoding/src/RFC4648.php',
+    'Predis\\Autoloader' => $vendorDir . '/predis/predis/src/Autoloader.php',
+    'Predis\\Client' => $vendorDir . '/predis/predis/src/Client.php',
+    'Predis\\ClientContextInterface' => $vendorDir . '/predis/predis/src/ClientContextInterface.php',
+    'Predis\\ClientException' => $vendorDir . '/predis/predis/src/ClientException.php',
+    'Predis\\ClientInterface' => $vendorDir . '/predis/predis/src/ClientInterface.php',
+    'Predis\\Cluster\\ClusterStrategy' => $vendorDir . '/predis/predis/src/Cluster/ClusterStrategy.php',
+    'Predis\\Cluster\\Distributor\\DistributorInterface' => $vendorDir . '/predis/predis/src/Cluster/Distributor/DistributorInterface.php',
+    'Predis\\Cluster\\Distributor\\EmptyRingException' => $vendorDir . '/predis/predis/src/Cluster/Distributor/EmptyRingException.php',
+    'Predis\\Cluster\\Distributor\\HashRing' => $vendorDir . '/predis/predis/src/Cluster/Distributor/HashRing.php',
+    'Predis\\Cluster\\Distributor\\KetamaRing' => $vendorDir . '/predis/predis/src/Cluster/Distributor/KetamaRing.php',
+    'Predis\\Cluster\\Hash\\CRC16' => $vendorDir . '/predis/predis/src/Cluster/Hash/CRC16.php',
+    'Predis\\Cluster\\Hash\\HashGeneratorInterface' => $vendorDir . '/predis/predis/src/Cluster/Hash/HashGeneratorInterface.php',
+    'Predis\\Cluster\\PredisStrategy' => $vendorDir . '/predis/predis/src/Cluster/PredisStrategy.php',
+    'Predis\\Cluster\\RedisStrategy' => $vendorDir . '/predis/predis/src/Cluster/RedisStrategy.php',
+    'Predis\\Cluster\\StrategyInterface' => $vendorDir . '/predis/predis/src/Cluster/StrategyInterface.php',
+    'Predis\\Collection\\Iterator\\CursorBasedIterator' => $vendorDir . '/predis/predis/src/Collection/Iterator/CursorBasedIterator.php',
+    'Predis\\Collection\\Iterator\\HashKey' => $vendorDir . '/predis/predis/src/Collection/Iterator/HashKey.php',
+    'Predis\\Collection\\Iterator\\Keyspace' => $vendorDir . '/predis/predis/src/Collection/Iterator/Keyspace.php',
+    'Predis\\Collection\\Iterator\\ListKey' => $vendorDir . '/predis/predis/src/Collection/Iterator/ListKey.php',
+    'Predis\\Collection\\Iterator\\SetKey' => $vendorDir . '/predis/predis/src/Collection/Iterator/SetKey.php',
+    'Predis\\Collection\\Iterator\\SortedSetKey' => $vendorDir . '/predis/predis/src/Collection/Iterator/SortedSetKey.php',
+    'Predis\\Command\\Command' => $vendorDir . '/predis/predis/src/Command/Command.php',
+    'Predis\\Command\\CommandInterface' => $vendorDir . '/predis/predis/src/Command/CommandInterface.php',
+    'Predis\\Command\\ConnectionAuth' => $vendorDir . '/predis/predis/src/Command/ConnectionAuth.php',
+    'Predis\\Command\\ConnectionEcho' => $vendorDir . '/predis/predis/src/Command/ConnectionEcho.php',
+    'Predis\\Command\\ConnectionPing' => $vendorDir . '/predis/predis/src/Command/ConnectionPing.php',
+    'Predis\\Command\\ConnectionQuit' => $vendorDir . '/predis/predis/src/Command/ConnectionQuit.php',
+    'Predis\\Command\\ConnectionSelect' => $vendorDir . '/predis/predis/src/Command/ConnectionSelect.php',
+    'Predis\\Command\\GeospatialGeoAdd' => $vendorDir . '/predis/predis/src/Command/GeospatialGeoAdd.php',
+    'Predis\\Command\\GeospatialGeoDist' => $vendorDir . '/predis/predis/src/Command/GeospatialGeoDist.php',
+    'Predis\\Command\\GeospatialGeoHash' => $vendorDir . '/predis/predis/src/Command/GeospatialGeoHash.php',
+    'Predis\\Command\\GeospatialGeoPos' => $vendorDir . '/predis/predis/src/Command/GeospatialGeoPos.php',
+    'Predis\\Command\\GeospatialGeoRadius' => $vendorDir . '/predis/predis/src/Command/GeospatialGeoRadius.php',
+    'Predis\\Command\\GeospatialGeoRadiusByMember' => $vendorDir . '/predis/predis/src/Command/GeospatialGeoRadiusByMember.php',
+    'Predis\\Command\\HashDelete' => $vendorDir . '/predis/predis/src/Command/HashDelete.php',
+    'Predis\\Command\\HashExists' => $vendorDir . '/predis/predis/src/Command/HashExists.php',
+    'Predis\\Command\\HashGet' => $vendorDir . '/predis/predis/src/Command/HashGet.php',
+    'Predis\\Command\\HashGetAll' => $vendorDir . '/predis/predis/src/Command/HashGetAll.php',
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+    'Predis\\Command\\KeyKeys' => $vendorDir . '/predis/predis/src/Command/KeyKeys.php',
+    'Predis\\Command\\KeyMigrate' => $vendorDir . '/predis/predis/src/Command/KeyMigrate.php',
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+    'Predis\\Command\\KeyRandom' => $vendorDir . '/predis/predis/src/Command/KeyRandom.php',
+    'Predis\\Command\\KeyRename' => $vendorDir . '/predis/predis/src/Command/KeyRename.php',
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+    'Predis\\Command\\KeySort' => $vendorDir . '/predis/predis/src/Command/KeySort.php',
+    'Predis\\Command\\KeyTimeToLive' => $vendorDir . '/predis/predis/src/Command/KeyTimeToLive.php',
+    'Predis\\Command\\KeyType' => $vendorDir . '/predis/predis/src/Command/KeyType.php',
+    'Predis\\Command\\ListIndex' => $vendorDir . '/predis/predis/src/Command/ListIndex.php',
+    'Predis\\Command\\ListInsert' => $vendorDir . '/predis/predis/src/Command/ListInsert.php',
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+    'Predis\\Command\\ListPopFirstBlocking' => $vendorDir . '/predis/predis/src/Command/ListPopFirstBlocking.php',
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+    'Predis\\Command\\ListPopLastPushHead' => $vendorDir . '/predis/predis/src/Command/ListPopLastPushHead.php',
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+    'Predis\\Command\\ListPushHead' => $vendorDir . '/predis/predis/src/Command/ListPushHead.php',
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+    'Predis\\Command\\ServerObject' => $vendorDir . '/predis/predis/src/Command/ServerObject.php',
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+    'Predis\\Command\\SetAdd' => $vendorDir . '/predis/predis/src/Command/SetAdd.php',
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+    'Predis\\Protocol\\Text\\Handler\\ResponseHandlerInterface' => $vendorDir . '/predis/predis/src/Protocol/Text/Handler/ResponseHandlerInterface.php',
+    'Predis\\Protocol\\Text\\Handler\\StatusResponse' => $vendorDir . '/predis/predis/src/Protocol/Text/Handler/StatusResponse.php',
+    'Predis\\Protocol\\Text\\Handler\\StreamableMultiBulkResponse' => $vendorDir . '/predis/predis/src/Protocol/Text/Handler/StreamableMultiBulkResponse.php',
+    'Predis\\Protocol\\Text\\ProtocolProcessor' => $vendorDir . '/predis/predis/src/Protocol/Text/ProtocolProcessor.php',
+    'Predis\\Protocol\\Text\\RequestSerializer' => $vendorDir . '/predis/predis/src/Protocol/Text/RequestSerializer.php',
+    'Predis\\Protocol\\Text\\ResponseReader' => $vendorDir . '/predis/predis/src/Protocol/Text/ResponseReader.php',
+    'Predis\\PubSub\\AbstractConsumer' => $vendorDir . '/predis/predis/src/PubSub/AbstractConsumer.php',
+    'Predis\\PubSub\\Consumer' => $vendorDir . '/predis/predis/src/PubSub/Consumer.php',
+    'Predis\\PubSub\\DispatcherLoop' => $vendorDir . '/predis/predis/src/PubSub/DispatcherLoop.php',
+    'Predis\\Replication\\MissingMasterException' => $vendorDir . '/predis/predis/src/Replication/MissingMasterException.php',
+    'Predis\\Replication\\ReplicationStrategy' => $vendorDir . '/predis/predis/src/Replication/ReplicationStrategy.php',
+    'Predis\\Replication\\RoleException' => $vendorDir . '/predis/predis/src/Replication/RoleException.php',
+    'Predis\\Response\\Error' => $vendorDir . '/predis/predis/src/Response/Error.php',
+    'Predis\\Response\\ErrorInterface' => $vendorDir . '/predis/predis/src/Response/ErrorInterface.php',
+    'Predis\\Response\\Iterator\\MultiBulk' => $vendorDir . '/predis/predis/src/Response/Iterator/MultiBulk.php',
+    'Predis\\Response\\Iterator\\MultiBulkIterator' => $vendorDir . '/predis/predis/src/Response/Iterator/MultiBulkIterator.php',
+    'Predis\\Response\\Iterator\\MultiBulkTuple' => $vendorDir . '/predis/predis/src/Response/Iterator/MultiBulkTuple.php',
+    'Predis\\Response\\ResponseInterface' => $vendorDir . '/predis/predis/src/Response/ResponseInterface.php',
+    'Predis\\Response\\ServerException' => $vendorDir . '/predis/predis/src/Response/ServerException.php',
+    'Predis\\Response\\Status' => $vendorDir . '/predis/predis/src/Response/Status.php',
+    'Predis\\Session\\Handler' => $vendorDir . '/predis/predis/src/Session/Handler.php',
+    'Predis\\Transaction\\AbortedMultiExecException' => $vendorDir . '/predis/predis/src/Transaction/AbortedMultiExecException.php',
+    'Predis\\Transaction\\MultiExec' => $vendorDir . '/predis/predis/src/Transaction/MultiExec.php',
+    'Predis\\Transaction\\MultiExecState' => $vendorDir . '/predis/predis/src/Transaction/MultiExecState.php',
     'Psr\\Http\\Message\\MessageInterface' => $vendorDir . '/psr/http-message/src/MessageInterface.php',
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vendor/composer/autoload_psr4.php

@@ -10,6 +10,7 @@ return array(
     'XMPPHP\\' => array($vendorDir . '/diogocomposer/xmpphp/XMPPHP'),
     'Stomp\\' => array($vendorDir . '/stomp-php/stomp-php/src'),
     'Psr\\Http\\Message\\' => array($vendorDir . '/psr/http-message/src'),
+    'Predis\\' => array($vendorDir . '/predis/predis/src'),
     'ParagonIE\\ConstantTime\\' => array($vendorDir . '/paragonie/constant_time_encoding/src'),
     'Michelf\\' => array($vendorDir . '/michelf/php-markdown/Michelf'),
     'Masterminds\\' => array($vendorDir . '/masterminds/html5/src'),

vendor/composer/autoload_static.php

@@ -32,6 +32,7 @@ class ComposerStaticInit444c3f31864f68a3f466e2c19837e185
         'P' => 
         array (
             'Psr\\Http\\Message\\' => 17,
+            'Predis\\' => 7,
             'ParagonIE\\ConstantTime\\' => 23,
         ),
         'M' => 
@@ -80,6 +81,10 @@ class ComposerStaticInit444c3f31864f68a3f466e2c19837e185
         array (
             0 => __DIR__ . '/..' . '/psr/http-message/src',
         ),
+        'Predis\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/predis/predis/src',
+        ),
         'ParagonIE\\ConstantTime\\' => 
         array (
             0 => __DIR__ . '/..' . '/paragonie/constant_time_encoding/src',
@@ -818,6 +823,277 @@ class ComposerStaticInit444c3f31864f68a3f466e2c19837e185
         'ParagonIE\\ConstantTime\\Encoding' => __DIR__ . '/..' . '/paragonie/constant_time_encoding/src/Encoding.php',
         'ParagonIE\\ConstantTime\\Hex' => __DIR__ . '/..' . '/paragonie/constant_time_encoding/src/Hex.php',
         'ParagonIE\\ConstantTime\\RFC4648' => __DIR__ . '/..' . '/paragonie/constant_time_encoding/src/RFC4648.php',
+        'Predis\\Autoloader' => __DIR__ . '/..' . '/predis/predis/src/Autoloader.php',
+        'Predis\\Client' => __DIR__ . '/..' . '/predis/predis/src/Client.php',
+        'Predis\\ClientContextInterface' => __DIR__ . '/..' . '/predis/predis/src/ClientContextInterface.php',
+        'Predis\\ClientException' => __DIR__ . '/..' . '/predis/predis/src/ClientException.php',
+        'Predis\\ClientInterface' => __DIR__ . '/..' . '/predis/predis/src/ClientInterface.php',
+        'Predis\\Cluster\\ClusterStrategy' => __DIR__ . '/..' . '/predis/predis/src/Cluster/ClusterStrategy.php',
+        'Predis\\Cluster\\Distributor\\DistributorInterface' => __DIR__ . '/..' . '/predis/predis/src/Cluster/Distributor/DistributorInterface.php',
+        'Predis\\Cluster\\Distributor\\EmptyRingException' => __DIR__ . '/..' . '/predis/predis/src/Cluster/Distributor/EmptyRingException.php',
+        'Predis\\Cluster\\Distributor\\HashRing' => __DIR__ . '/..' . '/predis/predis/src/Cluster/Distributor/HashRing.php',
+        'Predis\\Cluster\\Distributor\\KetamaRing' => __DIR__ . '/..' . '/predis/predis/src/Cluster/Distributor/KetamaRing.php',
+        'Predis\\Cluster\\Hash\\CRC16' => __DIR__ . '/..' . '/predis/predis/src/Cluster/Hash/CRC16.php',
+        'Predis\\Cluster\\Hash\\HashGeneratorInterface' => __DIR__ . '/..' . '/predis/predis/src/Cluster/Hash/HashGeneratorInterface.php',
+        'Predis\\Cluster\\PredisStrategy' => __DIR__ . '/..' . '/predis/predis/src/Cluster/PredisStrategy.php',
+        'Predis\\Cluster\\RedisStrategy' => __DIR__ . '/..' . '/predis/predis/src/Cluster/RedisStrategy.php',
+        'Predis\\Cluster\\StrategyInterface' => __DIR__ . '/..' . '/predis/predis/src/Cluster/StrategyInterface.php',
+        'Predis\\Collection\\Iterator\\CursorBasedIterator' => __DIR__ . '/..' . '/predis/predis/src/Collection/Iterator/CursorBasedIterator.php',
+        'Predis\\Collection\\Iterator\\HashKey' => __DIR__ . '/..' . '/predis/predis/src/Collection/Iterator/HashKey.php',
+        'Predis\\Collection\\Iterator\\Keyspace' => __DIR__ . '/..' . '/predis/predis/src/Collection/Iterator/Keyspace.php',
+        'Predis\\Collection\\Iterator\\ListKey' => __DIR__ . '/..' . '/predis/predis/src/Collection/Iterator/ListKey.php',
+        'Predis\\Collection\\Iterator\\SetKey' => __DIR__ . '/..' . '/predis/predis/src/Collection/Iterator/SetKey.php',
+        'Predis\\Collection\\Iterator\\SortedSetKey' => __DIR__ . '/..' . '/predis/predis/src/Collection/Iterator/SortedSetKey.php',
+        'Predis\\Command\\Command' => __DIR__ . '/..' . '/predis/predis/src/Command/Command.php',
+        'Predis\\Command\\CommandInterface' => __DIR__ . '/..' . '/predis/predis/src/Command/CommandInterface.php',
+        'Predis\\Command\\ConnectionAuth' => __DIR__ . '/..' . '/predis/predis/src/Command/ConnectionAuth.php',
+        'Predis\\Command\\ConnectionEcho' => __DIR__ . '/..' . '/predis/predis/src/Command/ConnectionEcho.php',
+        'Predis\\Command\\ConnectionPing' => __DIR__ . '/..' . '/predis/predis/src/Command/ConnectionPing.php',
+        'Predis\\Command\\ConnectionQuit' => __DIR__ . '/..' . '/predis/predis/src/Command/ConnectionQuit.php',
+        'Predis\\Command\\ConnectionSelect' => __DIR__ . '/..' . '/predis/predis/src/Command/ConnectionSelect.php',
+        'Predis\\Command\\GeospatialGeoAdd' => __DIR__ . '/..' . '/predis/predis/src/Command/GeospatialGeoAdd.php',
+        'Predis\\Command\\GeospatialGeoDist' => __DIR__ . '/..' . '/predis/predis/src/Command/GeospatialGeoDist.php',
+        'Predis\\Command\\GeospatialGeoHash' => __DIR__ . '/..' . '/predis/predis/src/Command/GeospatialGeoHash.php',
+        'Predis\\Command\\GeospatialGeoPos' => __DIR__ . '/..' . '/predis/predis/src/Command/GeospatialGeoPos.php',
+        'Predis\\Command\\GeospatialGeoRadius' => __DIR__ . '/..' . '/predis/predis/src/Command/GeospatialGeoRadius.php',
+        'Predis\\Command\\GeospatialGeoRadiusByMember' => __DIR__ . '/..' . '/predis/predis/src/Command/GeospatialGeoRadiusByMember.php',
+        'Predis\\Command\\HashDelete' => __DIR__ . '/..' . '/predis/predis/src/Command/HashDelete.php',
+        'Predis\\Command\\HashExists' => __DIR__ . '/..' . '/predis/predis/src/Command/HashExists.php',
+        'Predis\\Command\\HashGet' => __DIR__ . '/..' . '/predis/predis/src/Command/HashGet.php',
+        'Predis\\Command\\HashGetAll' => __DIR__ . '/..' . '/predis/predis/src/Command/HashGetAll.php',
+        'Predis\\Command\\HashGetMultiple' => __DIR__ . '/..' . '/predis/predis/src/Command/HashGetMultiple.php',
+        'Predis\\Command\\HashIncrementBy' => __DIR__ . '/..' . '/predis/predis/src/Command/HashIncrementBy.php',
+        'Predis\\Command\\HashIncrementByFloat' => __DIR__ . '/..' . '/predis/predis/src/Command/HashIncrementByFloat.php',
+        'Predis\\Command\\HashKeys' => __DIR__ . '/..' . '/predis/predis/src/Command/HashKeys.php',
+        'Predis\\Command\\HashLength' => __DIR__ . '/..' . '/predis/predis/src/Command/HashLength.php',
+        'Predis\\Command\\HashScan' => __DIR__ . '/..' . '/predis/predis/src/Command/HashScan.php',
+        'Predis\\Command\\HashSet' => __DIR__ . '/..' . '/predis/predis/src/Command/HashSet.php',
+        'Predis\\Command\\HashSetMultiple' => __DIR__ . '/..' . '/predis/predis/src/Command/HashSetMultiple.php',
+        'Predis\\Command\\HashSetPreserve' => __DIR__ . '/..' . '/predis/predis/src/Command/HashSetPreserve.php',
+        'Predis\\Command\\HashStringLength' => __DIR__ . '/..' . '/predis/predis/src/Command/HashStringLength.php',
+        'Predis\\Command\\HashValues' => __DIR__ . '/..' . '/predis/predis/src/Command/HashValues.php',
+        'Predis\\Command\\HyperLogLogAdd' => __DIR__ . '/..' . '/predis/predis/src/Command/HyperLogLogAdd.php',
+        'Predis\\Command\\HyperLogLogCount' => __DIR__ . '/..' . '/predis/predis/src/Command/HyperLogLogCount.php',
+        'Predis\\Command\\HyperLogLogMerge' => __DIR__ . '/..' . '/predis/predis/src/Command/HyperLogLogMerge.php',
+        'Predis\\Command\\KeyDelete' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyDelete.php',
+        'Predis\\Command\\KeyDump' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyDump.php',
+        'Predis\\Command\\KeyExists' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyExists.php',
+        'Predis\\Command\\KeyExpire' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyExpire.php',
+        'Predis\\Command\\KeyExpireAt' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyExpireAt.php',
+        'Predis\\Command\\KeyKeys' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyKeys.php',
+        'Predis\\Command\\KeyMigrate' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyMigrate.php',
+        'Predis\\Command\\KeyMove' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyMove.php',
+        'Predis\\Command\\KeyPersist' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyPersist.php',
+        'Predis\\Command\\KeyPreciseExpire' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyPreciseExpire.php',
+        'Predis\\Command\\KeyPreciseExpireAt' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyPreciseExpireAt.php',
+        'Predis\\Command\\KeyPreciseTimeToLive' => __DIR__ . '/..' . '/predis/predis/src/Command/KeyPreciseTimeToLive.php',
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+        'Predis\\Response\\Iterator\\MultiBulkIterator' => __DIR__ . '/..' . '/predis/predis/src/Response/Iterator/MultiBulkIterator.php',
+        'Predis\\Response\\Iterator\\MultiBulkTuple' => __DIR__ . '/..' . '/predis/predis/src/Response/Iterator/MultiBulkTuple.php',
+        'Predis\\Response\\ResponseInterface' => __DIR__ . '/..' . '/predis/predis/src/Response/ResponseInterface.php',
+        'Predis\\Response\\ServerException' => __DIR__ . '/..' . '/predis/predis/src/Response/ServerException.php',
+        'Predis\\Response\\Status' => __DIR__ . '/..' . '/predis/predis/src/Response/Status.php',
+        'Predis\\Session\\Handler' => __DIR__ . '/..' . '/predis/predis/src/Session/Handler.php',
+        'Predis\\Transaction\\AbortedMultiExecException' => __DIR__ . '/..' . '/predis/predis/src/Transaction/AbortedMultiExecException.php',
+        'Predis\\Transaction\\MultiExec' => __DIR__ . '/..' . '/predis/predis/src/Transaction/MultiExec.php',
+        'Predis\\Transaction\\MultiExecState' => __DIR__ . '/..' . '/predis/predis/src/Transaction/MultiExecState.php',
         'Psr\\Http\\Message\\MessageInterface' => __DIR__ . '/..' . '/psr/http-message/src/MessageInterface.php',
         'Psr\\Http\\Message\\RequestInterface' => __DIR__ . '/..' . '/psr/http-message/src/RequestInterface.php',
         'Psr\\Http\\Message\\ResponseInterface' => __DIR__ . '/..' . '/psr/http-message/src/ResponseInterface.php',

vendor/composer/installed.json

@@ -1102,6 +1102,58 @@
             "x509"
         ]
     },
+    {
+        "name": "predis/predis",
+        "version": "v1.1.1",
+        "version_normalized": "1.1.1.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/nrk/predis.git",
+            "reference": "f0210e38881631afeafb56ab43405a92cafd9fd1"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/nrk/predis/zipball/f0210e38881631afeafb56ab43405a92cafd9fd1",
+            "reference": "f0210e38881631afeafb56ab43405a92cafd9fd1",
+            "shasum": ""
+        },
+        "require": {
+            "php": ">=5.3.9"
+        },
+        "require-dev": {
+            "phpunit/phpunit": "~4.8"
+        },
+        "suggest": {
+            "ext-curl": "Allows access to Webdis when paired with phpiredis",
+            "ext-phpiredis": "Allows faster serialization and deserialization of the Redis protocol"
+        },
+        "time": "2016-06-16T16:22:20+00:00",
+        "type": "library",
+        "installation-source": "dist",
+        "autoload": {
+            "psr-4": {
+                "Predis\\": "src/"
+            }
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Daniele Alessandri",
+                "email": "suppakilla@gmail.com",
+                "homepage": "http://clorophilla.net"
+            }
+        ],
+        "description": "Flexible and feature-complete Redis client for PHP and HHVM",
+        "homepage": "http://github.com/nrk/predis",
+        "keywords": [
+            "nosql",
+            "predis",
+            "redis"
+        ]
+    },
     {
         "name": "psr/http-message",
         "version": "1.0.1",

vendor/enqueue/dsn/Dsn.php

@@ -0,0 +1,356 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Dsn;
+
+class Dsn
+{
+    /**
+     * @var string
+     */
+    private $scheme;
+
+    /**
+     * @var string
+     */
+    private $schemeProtocol;
+
+    /**
+     * @var string[]
+     */
+    private $schemeExtensions;
+
+    /**
+     * @var string|null
+     */
+    private $user;
+
+    /**
+     * @var string|null
+     */
+    private $password;
+
+    /**
+     * @var string|null
+     */
+    private $host;
+
+    /**
+     * @var int|null
+     */
+    private $port;
+
+    /**
+     * @var string|null
+     */
+    private $path;
+
+    /**
+     * @var string|null
+     */
+    private $queryString;
+
+    /**
+     * @var QueryBag
+     */
+    private $queryBag;
+
+    public function __construct(
+        string $scheme,
+        string $schemeProtocol,
+        array $schemeExtensions,
+        ?string $user,
+        ?string $password,
+        ?string $host,
+        ?int $port,
+        ?string $path,
+        ?string $queryString,
+        array $query
+    ) {
+        $this->scheme = $scheme;
+        $this->schemeProtocol = $schemeProtocol;
+        $this->schemeExtensions = $schemeExtensions;
+        $this->user = $user;
+        $this->password = $password;
+        $this->host = $host;
+        $this->port = $port;
+        $this->path = $path;
+        $this->queryString = $queryString;
+        $this->queryBag = new QueryBag($query);
+    }
+
+    public function getScheme(): string
+    {
+        return $this->scheme;
+    }
+
+    public function getSchemeProtocol(): string
+    {
+        return $this->schemeProtocol;
+    }
+
+    public function getSchemeExtensions(): array
+    {
+        return $this->schemeExtensions;
+    }
+
+    public function hasSchemeExtension(string $extension): bool
+    {
+        return in_array($extension, $this->schemeExtensions, true);
+    }
+
+    public function getUser(): ?string
+    {
+        return $this->user;
+    }
+
+    public function getPassword(): ?string
+    {
+        return $this->password;
+    }
+
+    public function getHost(): ?string
+    {
+        return $this->host;
+    }
+
+    public function getPort(): ?int
+    {
+        return $this->port;
+    }
+
+    public function getPath(): ?string
+    {
+        return $this->path;
+    }
+
+    public function getQueryString(): ?string
+    {
+        return $this->queryString;
+    }
+
+    public function getQueryBag(): QueryBag
+    {
+        return $this->queryBag;
+    }
+
+    public function getQuery(): array
+    {
+        return $this->queryBag->toArray();
+    }
+
+    public function getString(string $name, string $default = null): ?string
+    {
+        return $this->queryBag->getString($name, $default);
+    }
+
+    public function getDecimal(string $name, int $default = null): ?int
+    {
+        return $this->queryBag->getDecimal($name, $default);
+    }
+
+    public function getOctal(string $name, int $default = null): ?int
+    {
+        return $this->queryBag->getOctal($name, $default);
+    }
+
+    public function getFloat(string $name, float $default = null): ?float
+    {
+        return $this->queryBag->getFloat($name, $default);
+    }
+
+    public function getBool(string $name, bool $default = null): ?bool
+    {
+        return $this->queryBag->getBool($name, $default);
+    }
+
+    public function getArray(string $name, array $default = []): QueryBag
+    {
+        return $this->queryBag->getArray($name, $default);
+    }
+
+    public function toArray()
+    {
+        return [
+            'scheme' => $this->scheme,
+            'schemeProtocol' => $this->schemeProtocol,
+            'schemeExtensions' => $this->schemeExtensions,
+            'user' => $this->user,
+            'password' => $this->password,
+            'host' => $this->host,
+            'port' => $this->port,
+            'path' => $this->path,
+            'queryString' => $this->queryString,
+            'query' => $this->queryBag->toArray(),
+        ];
+    }
+
+    public static function parseFirst(string $dsn): ?self
+    {
+        return self::parse($dsn)[0];
+    }
+
+    /**
+     * @param string $dsn
+     *
+     * @return Dsn[]
+     */
+    public static function parse(string $dsn): array
+    {
+        if (false === strpos($dsn, ':')) {
+            throw new \LogicException(sprintf('The DSN is invalid. It does not have scheme separator ":".'));
+        }
+
+        list($scheme, $dsnWithoutScheme) = explode(':', $dsn, 2);
+
+        $scheme = strtolower($scheme);
+        if (false == preg_match('/^[a-z\d+-.]*$/', $scheme)) {
+            throw new \LogicException('The DSN is invalid. Scheme contains illegal symbols.');
+        }
+
+        $schemeParts = explode('+', $scheme);
+        $schemeProtocol = $schemeParts[0];
+
+        unset($schemeParts[0]);
+        $schemeExtensions = array_values($schemeParts);
+
+        $user = parse_url($dsn, PHP_URL_USER) ?: null;
+        if (is_string($user)) {
+            $user = rawurldecode($user);
+        }
+
+        $password = parse_url($dsn, PHP_URL_PASS) ?: null;
+        if (is_string($password)) {
+            $password = rawurldecode($password);
+        }
+
+        $path = parse_url($dsn, PHP_URL_PATH) ?: null;
+        if ($path) {
+            $path = rawurldecode($path);
+        }
+
+        $query = [];
+        $queryString = parse_url($dsn, PHP_URL_QUERY) ?: null;
+        if (is_string($queryString)) {
+            $query = self::httpParseQuery($queryString, '&', PHP_QUERY_RFC3986);
+        }
+        $hostsPorts = '';
+        if (0 === strpos($dsnWithoutScheme, '//')) {
+            $dsnWithoutScheme = substr($dsnWithoutScheme, 2);
+            $dsnWithoutUserPassword = explode('@', $dsnWithoutScheme, 2);
+            $dsnWithoutUserPassword = 2 === count($dsnWithoutUserPassword) ?
+                $dsnWithoutUserPassword[1] :
+                $dsnWithoutUserPassword[0]
+            ;
+
+            list($hostsPorts) = explode('#', $dsnWithoutUserPassword, 2);
+            list($hostsPorts) = explode('?', $hostsPorts, 2);
+            list($hostsPorts) = explode('/', $hostsPorts, 2);
+        }
+
+        if (empty($hostsPorts)) {
+            return [
+                new self(
+                    $scheme,
+                    $schemeProtocol,
+                    $schemeExtensions,
+                    null,
+                    null,
+                    null,
+                    null,
+                    $path,
+                    $queryString,
+                    $query
+                ),
+            ];
+        }
+
+        $dsns = [];
+        $hostParts = explode(',', $hostsPorts);
+        foreach ($hostParts as $key => $hostPart) {
+            unset($hostParts[$key]);
+
+            $parts = explode(':', $hostPart, 2);
+            $host = $parts[0];
+
+            $port = null;
+            if (isset($parts[1])) {
+                $port = (int) $parts[1];
+            }
+
+            $dsns[] = new self(
+                $scheme,
+                $schemeProtocol,
+                $schemeExtensions,
+                $user,
+                $password,
+                $host,
+                $port,
+                $path,
+                $queryString,
+                $query
+            );
+        }
+
+        return $dsns;
+    }
+
+    /**
+     * based on http://php.net/manual/en/function.parse-str.php#119484 with some slight modifications.
+     */
+    private static function httpParseQuery(string $queryString, string $argSeparator = '&', int $decType = PHP_QUERY_RFC1738): array
+    {
+        $result = [];
+        $parts = explode($argSeparator, $queryString);
+
+        foreach ($parts as $part) {
+            list($paramName, $paramValue) = explode('=', $part, 2);
+
+            switch ($decType) {
+                case PHP_QUERY_RFC3986:
+                    $paramName = rawurldecode($paramName);
+                    $paramValue = rawurldecode($paramValue);
+                    break;
+                case PHP_QUERY_RFC1738:
+                default:
+                    $paramName = urldecode($paramName);
+                    $paramValue = urldecode($paramValue);
+                    break;
+            }
+
+            if (preg_match_all('/\[([^\]]*)\]/m', $paramName, $matches)) {
+                $paramName = substr($paramName, 0, strpos($paramName, '['));
+                $keys = array_merge([$paramName], $matches[1]);
+            } else {
+                $keys = [$paramName];
+            }
+
+            $target = &$result;
+
+            foreach ($keys as $index) {
+                if ('' === $index) {
+                    if (is_array($target)) {
+                        $intKeys = array_filter(array_keys($target), 'is_int');
+                        $index = count($intKeys) ? max($intKeys) + 1 : 0;
+                    } else {
+                        $target = [$target];
+                        $index = 1;
+                    }
+                } elseif (isset($target[$index]) && !is_array($target[$index])) {
+                    $target[$index] = [$target[$index]];
+                }
+
+                $target = &$target[$index];
+            }
+
+            if (is_array($target)) {
+                $target[] = $paramValue;
+            } else {
+                $target = $paramValue;
+            }
+        }
+
+        return $result;
+    }
+}

vendor/enqueue/dsn/InvalidQueryParameterTypeException.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Enqueue\Dsn;
+
+final class InvalidQueryParameterTypeException extends \LogicException
+{
+    public static function create(string $name, string $expectedType): self
+    {
+        return new static(sprintf('The query parameter "%s" has invalid type. It must be "%s"', $name, $expectedType));
+    }
+}

vendor/enqueue/dsn/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+Copyright (c) 2018 Kotliar Maksym
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/enqueue/dsn/QueryBag.php

@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Dsn;
+
+class QueryBag
+{
+    /**
+     * @var array
+     */
+    private $query;
+
+    public function __construct(array $query)
+    {
+        $this->query = $query;
+    }
+
+    public function toArray(): array
+    {
+        return $this->query;
+    }
+
+    public function getString(string $name, string $default = null): ?string
+    {
+        return array_key_exists($name, $this->query) ? $this->query[$name] : $default;
+    }
+
+    public function getDecimal(string $name, int $default = null): ?int
+    {
+        $value = $this->getString($name);
+        if (null === $value) {
+            return $default;
+        }
+
+        if (false == preg_match('/^[\+\-]?[0-9]*$/', $value)) {
+            throw InvalidQueryParameterTypeException::create($name, 'decimal');
+        }
+
+        return (int) $value;
+    }
+
+    public function getOctal(string $name, int $default = null): ?int
+    {
+        $value = $this->getString($name);
+        if (null === $value) {
+            return $default;
+        }
+
+        if (false == preg_match('/^0[\+\-]?[0-7]*$/', $value)) {
+            throw InvalidQueryParameterTypeException::create($name, 'octal');
+        }
+
+        return intval($value, 8);
+    }
+
+    public function getFloat(string $name, float $default = null): ?float
+    {
+        $value = $this->getString($name);
+        if (null === $value) {
+            return $default;
+        }
+
+        if (false == is_numeric($value)) {
+            throw InvalidQueryParameterTypeException::create($name, 'float');
+        }
+
+        return (float) $value;
+    }
+
+    public function getBool(string $name, bool $default = null): ?bool
+    {
+        $value = $this->getString($name);
+        if (null === $value) {
+            return $default;
+        }
+
+        if (in_array($value, ['', '0', 'false'], true)) {
+            return false;
+        }
+
+        if (in_array($value, ['1', 'true'], true)) {
+            return true;
+        }
+
+        throw InvalidQueryParameterTypeException::create($name, 'bool');
+    }
+
+    public function getArray(string $name, array $default = []): self
+    {
+        if (false == array_key_exists($name, $this->query)) {
+            return new self($default);
+        }
+
+        $value = $this->query[$name];
+
+        if (is_array($value)) {
+            return new self($value);
+        }
+
+        throw InvalidQueryParameterTypeException::create($name, 'array');
+    }
+}

vendor/enqueue/dsn/README.md

@@ -0,0 +1,29 @@
+<h2 align="center">Supporting Enqueue</h2>
+
+Enqueue is an MIT-licensed open source project with its ongoing development made possible entirely by the support of community and our customers. If you'd like to join them, please consider:
+
+- [Become a sponsor](https://www.patreon.com/makasim)
+- [Become our client](http://forma-pro.com/)
+
+---
+
+# Enqueue. Parse DSN class
+
+## Resources
+
+* [Site](https://enqueue.forma-pro.com/)
+* [Documentation](https://github.com/php-enqueue/enqueue-dev/blob/master/docs/dsn.md)
+* [Questions](https://gitter.im/php-enqueue/Lobby)
+* [Issue Tracker](https://github.com/php-enqueue/enqueue-dev/issues)
+
+## Developed by Forma-Pro
+
+Forma-Pro is a full stack development company which interests also spread to open source development. 
+Being a team of strong professionals we have an aim an ability to help community by developing cutting edge solutions in the areas of e-commerce, docker & microservice oriented architecture where we have accumulated a huge many-years experience. 
+Our main specialization is Symfony framework based solution, but we are always looking to the technologies that allow us to do our job the best way. We are committed to creating solutions that revolutionize the way how things are developed in aspects of architecture & scalability.
+
+If you have any questions and inquires about our open source development, this product particularly or any other matter feel free to contact at opensource@forma-pro.com
+
+## License
+
+It is released under the [MIT License](LICENSE).

vendor/enqueue/dsn/composer.json

@@ -0,0 +1,33 @@
+{
+    "name": "enqueue/dsn",
+    "type": "library",
+    "description": "Parse DSN",
+    "keywords": ["dsn", "parse"],
+    "homepage": "https://enqueue.forma-pro.com/",
+    "license": "MIT",
+    "require": {
+        "php": "^7.1.3"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "~5.4.0"
+    },
+    "support": {
+        "email": "opensource@forma-pro.com",
+        "issues": "https://github.com/php-enqueue/enqueue-dev/issues",
+        "forum": "https://gitter.im/php-enqueue/Lobby",
+        "source": "https://github.com/php-enqueue/enqueue-dev",
+        "docs": "https://github.com/php-enqueue/enqueue-dev/blob/master/docs/index.md"
+    },
+    "autoload": {
+        "psr-4": { "Enqueue\\Dsn\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "branch-alias": {
+            "dev-master": "0.9.x-dev"
+        }
+    }
+}

vendor/enqueue/stomp/BufferedStompClient.php

@@ -0,0 +1,116 @@
+<?php
+
+namespace Enqueue\Stomp;
+
+use Stomp\Client;
+use Stomp\Transport\Frame;
+
+class BufferedStompClient extends Client
+{
+    /**
+     * [
+     *   'subscriptionId' => Frame[],
+     * ].
+     *
+     * @var array
+     */
+    private $buffer;
+
+    /**
+     * @var int int
+     */
+    private $bufferSize;
+
+    /**
+     * @var int
+     */
+    private $currentBufferSize;
+
+    /**
+     * @param \Stomp\Network\Connection|string $broker
+     * @param int                              $bufferSize
+     */
+    public function __construct($broker, $bufferSize = 1000)
+    {
+        parent::__construct($broker);
+
+        $this->bufferSize = $bufferSize;
+        $this->buffer = [];
+        $this->currentBufferSize = 0;
+    }
+
+    /**
+     * @return int
+     */
+    public function getBufferSize()
+    {
+        return $this->bufferSize;
+    }
+
+    /**
+     * Timeout is in milliseconds.
+     */
+    public function readMessageFrame(string $subscriptionId, int $timeout): ?Frame
+    {
+        // pop up frame from the buffer
+        if (isset($this->buffer[$subscriptionId]) && ($frame = array_shift($this->buffer[$subscriptionId]))) {
+            --$this->currentBufferSize;
+
+            return $frame;
+        }
+
+        // do nothing when buffer is full
+        if ($this->currentBufferSize >= $this->bufferSize) {
+            return null;
+        }
+
+        $startTime = microtime(true);
+        $remainingTimeout = $timeout * 1000;
+
+        while (true) {
+            $this->getConnection()->setReadTimeout(0, $remainingTimeout);
+
+            // there is nothing to read
+            if (false === $frame = $this->readFrame()) {
+                return null;
+            }
+
+            if ('MESSAGE' !== $frame->getCommand()) {
+                throw new \LogicException(sprintf('Unexpected frame was received: "%s"', $frame->getCommand()));
+            }
+
+            $headers = $frame->getHeaders();
+
+            if (false == isset($headers['subscription'])) {
+                throw new \LogicException('Got message frame with missing subscription header');
+            }
+
+            // frame belongs to another subscription
+            if ($headers['subscription'] !== $subscriptionId) {
+                $this->buffer[$headers['subscription']][] = $frame;
+                ++$this->currentBufferSize;
+
+                $remainingTimeout -= (microtime(true) - $startTime) * 1000000;
+
+                if ($remainingTimeout <= 0) {
+                    return null;
+                }
+
+                continue;
+            }
+
+            return $frame;
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function disconnect($sync = false)
+    {
+        parent::disconnect($sync);
+
+        $this->buffer = [];
+        $this->currentBufferSize = 0;
+    }
+}

vendor/enqueue/stomp/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+Copyright (c) 2016 Kotliar Maksym
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/enqueue/stomp/README.md

@@ -0,0 +1,36 @@
+<h2 align="center">Supporting Enqueue</h2>
+
+Enqueue is an MIT-licensed open source project with its ongoing development made possible entirely by the support of community and our customers. If you'd like to join them, please consider:
+
+- [Become a sponsor](https://www.patreon.com/makasim)
+- [Become our client](http://forma-pro.com/)
+
+---
+
+# STOMP Transport
+
+[![Gitter](https://badges.gitter.im/php-enqueue/Lobby.svg)](https://gitter.im/php-enqueue/Lobby)
+[![Build Status](https://travis-ci.org/php-enqueue/stomp.png?branch=master)](https://travis-ci.org/php-enqueue/stomp)
+[![Total Downloads](https://poser.pugx.org/enqueue/stomp/d/total.png)](https://packagist.org/packages/enqueue/stomp)
+[![Latest Stable Version](https://poser.pugx.org/enqueue/stomp/version.png)](https://packagist.org/packages/enqueue/stomp)
+
+This is an implementation of Queue Interop specification. It allows you to send and consume message via STOMP protocol.
+
+## Resources
+
+* [Site](https://enqueue.forma-pro.com/)
+* [Documentation](https://php-enqueue.github.io/transport/stomp/)
+* [Questions](https://gitter.im/php-enqueue/Lobby)
+* [Issue Tracker](https://github.com/php-enqueue/enqueue-dev/issues)
+
+## Developed by Forma-Pro
+
+Forma-Pro is a full stack development company which interests also spread to open source development.
+Being a team of strong professionals we have an aim an ability to help community by developing cutting edge solutions in the areas of e-commerce, docker & microservice oriented architecture where we have accumulated a huge many-years experience.
+Our main specialization is Symfony framework based solution, but we are always looking to the technologies that allow us to do our job the best way. We are committed to creating solutions that revolutionize the way how things are developed in aspects of architecture & scalability.
+
+If you have any questions and inquires about our open source development, this product particularly or any other matter feel free to contact at opensource@forma-pro.com
+
+## License
+
+It is released under the [MIT License](LICENSE).

vendor/enqueue/stomp/StompConnectionFactory.php

@@ -0,0 +1,150 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+use Enqueue\Dsn\Dsn;
+use Interop\Queue\ConnectionFactory;
+use Interop\Queue\Context;
+use Stomp\Network\Connection;
+
+class StompConnectionFactory implements ConnectionFactory
+{
+    const SCHEME_EXT_ACTIVEMQ = 'activemq';
+    const SCHEME_EXT_RABBITMQ = 'rabbitmq';
+
+    /**
+     * @var array
+     */
+    private $config;
+
+    /**
+     * @var BufferedStompClient
+     */
+    private $stomp;
+
+    /**
+     * $config = [
+     * 'host' => null,
+     * 'port' => null,
+     * 'login' => null,
+     * 'password' => null,
+     * 'vhost' => null,
+     * 'buffer_size' => 1000,
+     * 'connection_timeout' => 1,
+     * 'sync' => false,
+     * 'lazy' => true,
+     * 'ssl_on' => false,
+     * ].
+     *
+     * or
+     *
+     * stomp:
+     * stomp:?buffer_size=100
+     *
+     * @param array|string|null $config
+     */
+    public function __construct($config = 'stomp:')
+    {
+        if (empty($config) || 'stomp:' === $config) {
+            $config = [];
+        } elseif (is_string($config)) {
+            $config = $this->parseDsn($config);
+        } elseif (is_array($config)) {
+            if (array_key_exists('dsn', $config)) {
+                $config = array_replace($config, $this->parseDsn($config['dsn']));
+
+                unset($config['dsn']);
+            }
+        } else {
+            throw new \LogicException('The config must be either an array of options, a DSN string or null');
+        }
+
+        $this->config = array_replace($this->defaultConfig(), $config);
+    }
+
+    /**
+     * @return StompContext
+     */
+    public function createContext(): Context
+    {
+        $useExchangePrefix = self::SCHEME_EXT_RABBITMQ === $this->config['target'] ? true : false;
+
+        if ($this->config['lazy']) {
+            return new StompContext(function () {
+                return $this->establishConnection();
+            }, $useExchangePrefix);
+        }
+
+        return new StompContext($this->establishConnection(), $useExchangePrefix);
+    }
+
+    private function establishConnection(): BufferedStompClient
+    {
+        if (false == $this->stomp) {
+            $config = $this->config;
+
+            $scheme = (true === $config['ssl_on']) ? 'ssl' : 'tcp';
+            $uri = $scheme.'://'.$config['host'].':'.$config['port'];
+            $connection = new Connection($uri, $config['connection_timeout']);
+
+            $this->stomp = new BufferedStompClient($connection, $config['buffer_size']);
+            $this->stomp->setLogin($config['login'], $config['password']);
+            $this->stomp->setVhostname($config['vhost']);
+            $this->stomp->setSync($config['sync']);
+
+            $this->stomp->connect();
+        }
+
+        return $this->stomp;
+    }
+
+    private function parseDsn(string $dsn): array
+    {
+        $dsn = Dsn::parseFirst($dsn);
+
+        if ('stomp' !== $dsn->getSchemeProtocol()) {
+            throw new \LogicException(sprintf('The given DSN is not supported. Must start with "stomp:".'));
+        }
+
+        $schemeExtension = current($dsn->getSchemeExtensions());
+        if (false === $schemeExtension) {
+            $schemeExtension = self::SCHEME_EXT_RABBITMQ;
+        }
+        if (self::SCHEME_EXT_ACTIVEMQ !== $schemeExtension && self::SCHEME_EXT_RABBITMQ !== $schemeExtension) {
+            throw new \LogicException(sprintf('The given DSN is not supported. The scheme extension "%s" provided is invalid. It must be one of "%s" or "%s".', $schemeExtension, self::SCHEME_EXT_ACTIVEMQ, self::SCHEME_EXT_RABBITMQ));
+        }
+
+        return array_filter(array_replace($dsn->getQuery(), [
+            'target' => $schemeExtension,
+            'host' => $dsn->getHost(),
+            'port' => $dsn->getPort(),
+            'login' => $dsn->getUser(),
+            'password' => $dsn->getPassword(),
+            'vhost' => null !== $dsn->getPath() ? ltrim($dsn->getPath(), '/') : null,
+            'buffer_size' => $dsn->getDecimal('buffer_size'),
+            'connection_timeout' => $dsn->getDecimal('connection_timeout'),
+            'sync' => $dsn->getBool('sync'),
+            'lazy' => $dsn->getBool('lazy'),
+            'ssl_on' => $dsn->getBool('ssl_on'),
+        ]), function ($value) { return null !== $value; });
+    }
+
+    private function defaultConfig(): array
+    {
+        return [
+            'target' => self::SCHEME_EXT_RABBITMQ,
+            'host' => 'localhost',
+            'port' => 61613,
+            'login' => 'guest',
+            'password' => 'guest',
+            'vhost' => '/',
+            'buffer_size' => 1000,
+            'connection_timeout' => 1,
+            'sync' => false,
+            'lazy' => true,
+            'ssl_on' => false,
+        ];
+    }
+}

vendor/enqueue/stomp/StompConsumer.php

@@ -0,0 +1,210 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+use Interop\Queue\Consumer;
+use Interop\Queue\Exception\InvalidMessageException;
+use Interop\Queue\Message;
+use Interop\Queue\Queue;
+use Stomp\Client;
+use Stomp\Transport\Frame;
+
+class StompConsumer implements Consumer
+{
+    const ACK_AUTO = 'auto';
+    const ACK_CLIENT = 'client';
+    const ACK_CLIENT_INDIVIDUAL = 'client-individual';
+
+    /**
+     * @var StompDestination
+     */
+    private $queue;
+
+    /**
+     * @var Client
+     */
+    private $stomp;
+
+    /**
+     * @var bool
+     */
+    private $isSubscribed;
+
+    /**
+     * @var string
+     */
+    private $ackMode;
+
+    /**
+     * @var int
+     */
+    private $prefetchCount;
+
+    /**
+     * @var string
+     */
+    private $subscriptionId;
+
+    public function __construct(BufferedStompClient $stomp, StompDestination $queue)
+    {
+        $this->stomp = $stomp;
+        $this->queue = $queue;
+        $this->isSubscribed = false;
+        $this->ackMode = self::ACK_CLIENT_INDIVIDUAL;
+        $this->prefetchCount = 1;
+        $this->subscriptionId = StompDestination::TYPE_TEMP_QUEUE == $queue->getType() ?
+            $queue->getQueueName() :
+            uniqid('', true)
+        ;
+    }
+
+    public function setAckMode(string $mode): void
+    {
+        if (false === in_array($mode, [self::ACK_AUTO, self::ACK_CLIENT, self::ACK_CLIENT_INDIVIDUAL], true)) {
+            throw new \LogicException(sprintf('Ack mode is not valid: "%s"', $mode));
+        }
+
+        $this->ackMode = $mode;
+    }
+
+    public function getAckMode(): string
+    {
+        return $this->ackMode;
+    }
+
+    public function getPrefetchCount(): int
+    {
+        return $this->prefetchCount;
+    }
+
+    public function setPrefetchCount(int $prefetchCount): void
+    {
+        $this->prefetchCount = $prefetchCount;
+    }
+
+    /**
+     * @return StompDestination
+     */
+    public function getQueue(): Queue
+    {
+        return $this->queue;
+    }
+
+    public function receive(int $timeout = 0): ?Message
+    {
+        $this->subscribe();
+
+        if (0 === $timeout) {
+            while (true) {
+                if ($message = $this->stomp->readMessageFrame($this->subscriptionId, 100)) {
+                    return $this->convertMessage($message);
+                }
+            }
+        } else {
+            if ($message = $this->stomp->readMessageFrame($this->subscriptionId, $timeout)) {
+                return $this->convertMessage($message);
+            }
+        }
+
+        return null;
+    }
+
+    public function receiveNoWait(): ?Message
+    {
+        $this->subscribe();
+
+        if ($message = $this->stomp->readMessageFrame($this->subscriptionId, 0)) {
+            return $this->convertMessage($message);
+        }
+
+        return null;
+    }
+
+    /**
+     * @param StompMessage $message
+     */
+    public function acknowledge(Message $message): void
+    {
+        InvalidMessageException::assertMessageInstanceOf($message, StompMessage::class);
+
+        $this->stomp->sendFrame(
+            $this->stomp->getProtocol()->getAckFrame($message->getFrame())
+        );
+    }
+
+    /**
+     * @param StompMessage $message
+     */
+    public function reject(Message $message, bool $requeue = false): void
+    {
+        InvalidMessageException::assertMessageInstanceOf($message, StompMessage::class);
+
+        $nackFrame = $this->stomp->getProtocol()->getNackFrame($message->getFrame());
+
+        // rabbitmq STOMP protocol extension
+        $nackFrame->addHeaders([
+            'requeue' => $requeue ? 'true' : 'false',
+        ]);
+
+        $this->stomp->sendFrame($nackFrame);
+    }
+
+    private function subscribe(): void
+    {
+        if (StompDestination::TYPE_TEMP_QUEUE == $this->queue->getType()) {
+            $this->isSubscribed = true;
+
+            return;
+        }
+
+        if (false == $this->isSubscribed) {
+            $this->isSubscribed = true;
+
+            $frame = $this->stomp->getProtocol()->getSubscribeFrame(
+                $this->queue->getQueueName(),
+                $this->subscriptionId,
+                $this->ackMode
+            );
+
+            // rabbitmq STOMP protocol extension
+            $headers = $this->queue->getHeaders();
+            $headers['prefetch-count'] = $this->prefetchCount;
+            $headers = StompHeadersEncoder::encode($headers);
+
+            foreach ($headers as $key => $value) {
+                $frame[$key] = $value;
+            }
+
+            $this->stomp->sendFrame($frame);
+        }
+    }
+
+    private function convertMessage(Frame $frame): StompMessage
+    {
+        if ('MESSAGE' !== $frame->getCommand()) {
+            throw new \LogicException(sprintf('Frame is not MESSAGE frame but: "%s"', $frame->getCommand()));
+        }
+
+        list($headers, $properties) = StompHeadersEncoder::decode($frame->getHeaders());
+
+        $redelivered = isset($headers['redelivered']) && 'true' === $headers['redelivered'];
+
+        unset(
+            $headers['redelivered'],
+            $headers['destination'],
+            $headers['message-id'],
+            $headers['ack'],
+            $headers['receipt'],
+            $headers['subscription'],
+            $headers['content-length']
+        );
+
+        $message = new StompMessage((string) $frame->getBody(), $properties, $headers);
+        $message->setRedelivered($redelivered);
+        $message->setFrame($frame);
+
+        return $message;
+    }
+}

vendor/enqueue/stomp/StompContext.php

@@ -0,0 +1,213 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+use Interop\Queue\Consumer;
+use Interop\Queue\Context;
+use Interop\Queue\Destination;
+use Interop\Queue\Exception\InvalidDestinationException;
+use Interop\Queue\Exception\PurgeQueueNotSupportedException;
+use Interop\Queue\Exception\SubscriptionConsumerNotSupportedException;
+use Interop\Queue\Message;
+use Interop\Queue\Producer;
+use Interop\Queue\Queue;
+use Interop\Queue\SubscriptionConsumer;
+use Interop\Queue\Topic;
+
+class StompContext implements Context
+{
+    /**
+     * @var BufferedStompClient
+     */
+    private $stomp;
+
+    /**
+     * @var bool
+     */
+    private $useExchangePrefix;
+
+    /**
+     * @var callable
+     */
+    private $stompFactory;
+
+    /**
+     * @param BufferedStompClient|callable $stomp
+     * @param bool                         $useExchangePrefix
+     */
+    public function __construct($stomp, $useExchangePrefix = true)
+    {
+        if ($stomp instanceof BufferedStompClient) {
+            $this->stomp = $stomp;
+        } elseif (is_callable($stomp)) {
+            $this->stompFactory = $stomp;
+        } else {
+            throw new \InvalidArgumentException('The stomp argument must be either BufferedStompClient or callable that return BufferedStompClient.');
+        }
+
+        $this->useExchangePrefix = $useExchangePrefix;
+    }
+
+    /**
+     * @return StompMessage
+     */
+    public function createMessage(string $body = '', array $properties = [], array $headers = []): Message
+    {
+        return new StompMessage($body, $properties, $headers);
+    }
+
+    /**
+     * @return StompDestination
+     */
+    public function createQueue(string $name): Queue
+    {
+        if (0 !== strpos($name, '/')) {
+            $destination = new StompDestination();
+            $destination->setType(StompDestination::TYPE_QUEUE);
+            $destination->setStompName($name);
+
+            return $destination;
+        }
+
+        return $this->createDestination($name);
+    }
+
+    /**
+     * @return StompDestination
+     */
+    public function createTemporaryQueue(): Queue
+    {
+        $queue = $this->createQueue(uniqid('', true));
+        $queue->setType(StompDestination::TYPE_TEMP_QUEUE);
+
+        return $queue;
+    }
+
+    /**
+     * @return StompDestination
+     */
+    public function createTopic(string $name): Topic
+    {
+        if (0 !== strpos($name, '/')) {
+            $destination = new StompDestination();
+            $destination->setType($this->useExchangePrefix ? StompDestination::TYPE_EXCHANGE : StompDestination::TYPE_TOPIC);
+            $destination->setStompName($name);
+
+            return $destination;
+        }
+
+        return $this->createDestination($name);
+    }
+
+    public function createDestination(string $destination): StompDestination
+    {
+        $types = [
+            StompDestination::TYPE_TOPIC,
+            StompDestination::TYPE_EXCHANGE,
+            StompDestination::TYPE_QUEUE,
+            StompDestination::TYPE_AMQ_QUEUE,
+            StompDestination::TYPE_TEMP_QUEUE,
+            StompDestination::TYPE_REPLY_QUEUE,
+        ];
+
+        $dest = $destination;
+        $type = null;
+        $name = null;
+        $routingKey = null;
+
+        foreach ($types as $_type) {
+            $typePrefix = '/'.$_type.'/';
+            if (0 === strpos($dest, $typePrefix)) {
+                $type = $_type;
+                $dest = substr($dest, strlen($typePrefix));
+
+                break;
+            }
+        }
+
+        if (null === $type) {
+            throw new \LogicException(sprintf('Destination name is invalid, cant find type: "%s"', $destination));
+        }
+
+        $pieces = explode('/', $dest);
+
+        if (count($pieces) > 2) {
+            throw new \LogicException(sprintf('Destination name is invalid, found extra / char: "%s"', $destination));
+        }
+
+        if (empty($pieces[0])) {
+            throw new \LogicException(sprintf('Destination name is invalid, name is empty: "%s"', $destination));
+        }
+
+        $name = $pieces[0];
+
+        if (isset($pieces[1])) {
+            if (empty($pieces[1])) {
+                throw new \LogicException(sprintf('Destination name is invalid, routing key is empty: "%s"', $destination));
+            }
+
+            $routingKey = $pieces[1];
+        }
+
+        $destination = new StompDestination();
+        $destination->setType($type);
+        $destination->setStompName($name);
+        $destination->setRoutingKey($routingKey);
+
+        return $destination;
+    }
+
+    /**
+     * @param StompDestination $destination
+     *
+     * @return StompConsumer
+     */
+    public function createConsumer(Destination $destination): Consumer
+    {
+        InvalidDestinationException::assertDestinationInstanceOf($destination, StompDestination::class);
+
+        return new StompConsumer($this->getStomp(), $destination);
+    }
+
+    /**
+     * @return StompProducer
+     */
+    public function createProducer(): Producer
+    {
+        return new StompProducer($this->getStomp());
+    }
+
+    public function close(): void
+    {
+        $this->getStomp()->disconnect();
+    }
+
+    public function createSubscriptionConsumer(): SubscriptionConsumer
+    {
+        throw SubscriptionConsumerNotSupportedException::providerDoestNotSupportIt();
+    }
+
+    public function purgeQueue(Queue $queue): void
+    {
+        throw PurgeQueueNotSupportedException::providerDoestNotSupportIt();
+    }
+
+    public function getStomp(): BufferedStompClient
+    {
+        if (false == $this->stomp) {
+            $stomp = call_user_func($this->stompFactory);
+            if (false == $stomp instanceof BufferedStompClient) {
+                throw new \LogicException(sprintf(
+                    'The factory must return instance of BufferedStompClient. It returns %s',
+                    is_object($stomp) ? get_class($stomp) : gettype($stomp)
+                ));
+            }
+
+            $this->stomp = $stomp;
+        }
+
+        return $this->stomp;
+    }
+}

vendor/enqueue/stomp/StompDestination.php

@@ -0,0 +1,164 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+use Interop\Queue\Queue;
+use Interop\Queue\Topic;
+
+class StompDestination implements Topic, Queue
+{
+    const TYPE_TOPIC = 'topic';
+    const TYPE_EXCHANGE = 'exchange';
+    const TYPE_QUEUE = 'queue';
+    const TYPE_AMQ_QUEUE = 'amq/queue';
+    const TYPE_TEMP_QUEUE = 'temp-queue';
+    const TYPE_REPLY_QUEUE = 'reply-queue';
+
+    const HEADER_DURABLE = 'durable';
+    const HEADER_AUTO_DELETE = 'auto-delete';
+    const HEADER_EXCLUSIVE = 'exclusive';
+
+    /**
+     * @var string
+     */
+    private $name;
+
+    /**
+     * @var string
+     */
+    private $type;
+
+    /**
+     * @var string
+     */
+    private $routingKey;
+
+    /**
+     * @var array
+     */
+    private $headers;
+
+    public function __construct()
+    {
+        $this->headers = [
+            self::HEADER_DURABLE => false,
+            self::HEADER_AUTO_DELETE => true,
+            self::HEADER_EXCLUSIVE => false,
+        ];
+    }
+
+    public function getStompName(): string
+    {
+        return $this->name;
+    }
+
+    public function setStompName(string $name): void
+    {
+        $this->name = $name;
+    }
+
+    public function getQueueName(): string
+    {
+        if (empty($this->getStompName())) {
+            throw new \LogicException('Destination name is not set');
+        }
+
+        $name = '/'.$this->getType().'/'.$this->getStompName();
+
+        if ($this->getRoutingKey()) {
+            $name .= '/'.$this->getRoutingKey();
+        }
+
+        return $name;
+    }
+
+    public function getTopicName(): string
+    {
+        return $this->getQueueName();
+    }
+
+    public function getType(): string
+    {
+        return $this->type;
+    }
+
+    public function setType(string $type): void
+    {
+        $types = [
+            self::TYPE_TOPIC,
+            self::TYPE_EXCHANGE,
+            self::TYPE_QUEUE,
+            self::TYPE_AMQ_QUEUE,
+            self::TYPE_TEMP_QUEUE,
+            self::TYPE_REPLY_QUEUE,
+        ];
+
+        if (false == in_array($type, $types, true)) {
+            throw new \LogicException(sprintf('Invalid destination type: "%s"', $type));
+        }
+
+        $this->type = $type;
+    }
+
+    public function getRoutingKey(): ?string
+    {
+        return $this->routingKey;
+    }
+
+    public function setRoutingKey(string $routingKey = null): void
+    {
+        $this->routingKey = $routingKey;
+    }
+
+    public function isDurable(): bool
+    {
+        return $this->getHeader(self::HEADER_DURABLE, false);
+    }
+
+    public function setDurable(bool $durable): void
+    {
+        $this->setHeader(self::HEADER_DURABLE, $durable);
+    }
+
+    public function isAutoDelete(): bool
+    {
+        return $this->getHeader(self::HEADER_AUTO_DELETE, false);
+    }
+
+    public function setAutoDelete(bool $autoDelete): void
+    {
+        $this->setHeader(self::HEADER_AUTO_DELETE, $autoDelete);
+    }
+
+    public function isExclusive(): bool
+    {
+        return $this->getHeader(self::HEADER_EXCLUSIVE, false);
+    }
+
+    public function setExclusive(bool $exclusive): void
+    {
+        $this->setHeader(self::HEADER_EXCLUSIVE, $exclusive);
+    }
+
+    public function setHeaders(array $headers): void
+    {
+        $this->headers = $headers;
+    }
+
+    public function getHeaders(): array
+    {
+        return $this->headers;
+    }
+
+    public function getHeader(string $name, $default = null)
+    {
+        return array_key_exists($name, $this->headers) ? $this->headers[$name] : $default;
+    }
+
+    public function setHeader(string $name, $value): void
+    {
+        $this->headers[$name] = $value;
+    }
+}

vendor/enqueue/stomp/StompHeadersEncoder.php

@@ -0,0 +1,136 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+class StompHeadersEncoder
+{
+    const PROPERTY_PREFIX = '_property_';
+    const TYPE_PREFIX = '_type_';
+    const TYPE_STRING = 's';
+    const TYPE_INT = 'i';
+    const TYPE_FLOAT = 'f';
+    const TYPE_BOOL = 'b';
+    const TYPE_NULL = 'n';
+
+    public static function encode(array $headers = [], array $properties = []): array
+    {
+        $encodedHeaders = self::doEncode($headers);
+
+        foreach (self::doEncode($properties) as $key => $value) {
+            $encodedHeaders[self::PROPERTY_PREFIX.$key] = $value;
+        }
+
+        return $encodedHeaders;
+    }
+
+    /**
+     * Returns array [[headers], [properties]].
+     */
+    public static function decode(array $headers = []): array
+    {
+        $encodedHeaders = [];
+        $encodedProperties = [];
+        $prefixLength = strlen(self::PROPERTY_PREFIX);
+
+        // separate headers/properties
+        foreach ($headers as $key => $value) {
+            if (0 === strpos($key, self::PROPERTY_PREFIX)) {
+                $encodedProperties[substr($key, $prefixLength)] = $value;
+            } else {
+                $encodedHeaders[$key] = $value;
+            }
+        }
+
+        $decodedHeaders = self::doDecode($encodedHeaders);
+        $decodedProperties = self::doDecode($encodedProperties);
+
+        return [$decodedHeaders, $decodedProperties];
+    }
+
+    private static function doEncode(array $headers = []): array
+    {
+        $encoded = [];
+
+        foreach ($headers as $key => $value) {
+            switch ($type = gettype($value)) {
+                case 'string':
+                    $encoded[$key] = (string) $value;
+                    $encoded[self::TYPE_PREFIX.$key] = self::TYPE_STRING;
+
+                    break;
+                case 'integer':
+                    $encoded[$key] = (string) $value;
+                    $encoded[self::TYPE_PREFIX.$key] = self::TYPE_INT;
+
+                    break;
+                case 'double':
+                    $encoded[$key] = (string) $value;
+                    $encoded[self::TYPE_PREFIX.$key] = self::TYPE_FLOAT;
+
+                    break;
+                case 'NULL':
+                    $encoded[$key] = '';
+                    $encoded[self::TYPE_PREFIX.$key] = self::TYPE_NULL;
+
+                    break;
+                case 'boolean':
+                    $encoded[$key] = $value ? 'true' : 'false';
+                    $encoded[self::TYPE_PREFIX.$key] = self::TYPE_BOOL;
+
+                    break;
+                default:
+                    throw new \LogicException(sprintf('Value type is not valid: "%s"', $type));
+            }
+        }
+
+        return $encoded;
+    }
+
+    private static function doDecode(array $headers = []): array
+    {
+        $decoded = [];
+
+        foreach ($headers as $key => $value) {
+            // skip type header
+            if (0 === strpos($key, self::TYPE_PREFIX)) {
+                continue;
+            }
+
+            // copy value as is if here is no type header
+            if (false == array_key_exists(self::TYPE_PREFIX.$key, $headers)) {
+                $decoded[$key] = $value;
+
+                continue;
+            }
+
+            switch ($headers[self::TYPE_PREFIX.$key]) {
+                case self::TYPE_STRING:
+                    $decoded[$key] = (string) $value;
+
+                    break;
+                case self::TYPE_INT:
+                    $decoded[$key] = (int) $value;
+
+                    break;
+                case self::TYPE_FLOAT:
+                    $decoded[$key] = (float) $value;
+
+                    break;
+                case self::TYPE_NULL:
+                    $decoded[$key] = null;
+
+                    break;
+                case self::TYPE_BOOL:
+                    $decoded[$key] = 'true' === $value;
+
+                    break;
+                default:
+                    throw new \LogicException(sprintf('Type is invalid: "%s"', $value));
+            }
+        }
+
+        return $decoded;
+    }
+}

vendor/enqueue/stomp/StompMessage.php

@@ -0,0 +1,174 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+use Interop\Queue\Message;
+use Stomp\Transport\Frame;
+
+class StompMessage implements Message
+{
+    /**
+     * @var string
+     */
+    private $body;
+
+    /**
+     * @var array
+     */
+    private $properties;
+
+    /**
+     * @var array
+     */
+    private $headers;
+
+    /**
+     * @var bool
+     */
+    private $redelivered;
+
+    /**
+     * @var Frame
+     */
+    private $frame;
+
+    public function __construct(string $body = '', array $properties = [], array $headers = [])
+    {
+        $this->body = $body;
+        $this->properties = $properties;
+        $this->headers = $headers;
+        $this->redelivered = false;
+    }
+
+    public function setBody(string $body): void
+    {
+        $this->body = $body;
+    }
+
+    public function getBody(): string
+    {
+        return $this->body;
+    }
+
+    public function setProperties(array $properties): void
+    {
+        $this->properties = $properties;
+    }
+
+    public function getProperties(): array
+    {
+        return $this->properties;
+    }
+
+    public function setProperty(string $name, $value): void
+    {
+        if (null === $value) {
+            unset($this->properties[$name]);
+        } else {
+            $this->properties[$name] = $value;
+        }
+    }
+
+    public function getProperty(string $name, $default = null)
+    {
+        return array_key_exists($name, $this->properties) ? $this->properties[$name] : $default;
+    }
+
+    public function setHeaders(array $headers): void
+    {
+        $this->headers = $headers;
+    }
+
+    public function getHeaders(): array
+    {
+        return $this->headers;
+    }
+
+    public function setHeader(string $name, $value): void
+    {
+        if (null === $value) {
+            unset($this->headers[$name]);
+        } else {
+            $this->headers[$name] = $value;
+        }
+    }
+
+    public function getHeader(string $name, $default = null)
+    {
+        return array_key_exists($name, $this->headers) ? $this->headers[$name] : $default;
+    }
+
+    public function isPersistent(): bool
+    {
+        return $this->getHeader('persistent', false);
+    }
+
+    public function setPersistent(bool $persistent): void
+    {
+        $this->setHeader('persistent', $persistent);
+    }
+
+    public function isRedelivered(): bool
+    {
+        return $this->redelivered;
+    }
+
+    public function setRedelivered(bool $redelivered): void
+    {
+        $this->redelivered = $redelivered;
+    }
+
+    public function setCorrelationId(string $correlationId = null): void
+    {
+        $this->setHeader('correlation_id', (string) $correlationId);
+    }
+
+    public function getCorrelationId(): ?string
+    {
+        return $this->getHeader('correlation_id');
+    }
+
+    public function setMessageId(string $messageId = null): void
+    {
+        $this->setHeader('message_id', (string) $messageId);
+    }
+
+    public function getMessageId(): ?string
+    {
+        return $this->getHeader('message_id');
+    }
+
+    public function getTimestamp(): ?int
+    {
+        $value = $this->getHeader('timestamp');
+
+        return null === $value ? null : (int) $value;
+    }
+
+    public function setTimestamp(int $timestamp = null): void
+    {
+        $this->setHeader('timestamp', $timestamp);
+    }
+
+    public function getFrame(): ?Frame
+    {
+        return $this->frame;
+    }
+
+    public function setFrame(Frame $frame = null): void
+    {
+        $this->frame = $frame;
+    }
+
+    public function setReplyTo(string $replyTo = null): void
+    {
+        $this->setHeader('reply-to', $replyTo);
+    }
+
+    public function getReplyTo(): ?string
+    {
+        return $this->getHeader('reply-to');
+    }
+}

vendor/enqueue/stomp/StompProducer.php

@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Enqueue\Stomp;
+
+use Interop\Queue\Destination;
+use Interop\Queue\Exception\InvalidDestinationException;
+use Interop\Queue\Exception\InvalidMessageException;
+use Interop\Queue\Exception\PriorityNotSupportedException;
+use Interop\Queue\Message;
+use Interop\Queue\Producer;
+use Stomp\Client;
+use Stomp\Transport\Message as StompLibMessage;
+
+class StompProducer implements Producer
+{
+    /**
+     * @var Client
+     */
+    private $stomp;
+
+    /**
+     * @param Client $stomp
+     */
+    public function __construct(Client $stomp)
+    {
+        $this->stomp = $stomp;
+    }
+
+    /**
+     * @param StompDestination $destination
+     * @param StompMessage     $message
+     */
+    public function send(Destination $destination, Message $message): void
+    {
+        InvalidDestinationException::assertDestinationInstanceOf($destination, StompDestination::class);
+        InvalidMessageException::assertMessageInstanceOf($message, StompMessage::class);
+
+        $headers = array_merge($message->getHeaders(), $destination->getHeaders());
+        $headers = StompHeadersEncoder::encode($headers, $message->getProperties());
+
+        $stompMessage = new StompLibMessage($message->getBody(), $headers);
+
+        $this->stomp->send($destination->getQueueName(), $stompMessage);
+    }
+
+    public function setDeliveryDelay(int $deliveryDelay = null): Producer
+    {
+        if (null === $deliveryDelay) {
+            return $this;
+        }
+
+        throw new \LogicException('Not implemented');
+    }
+
+    public function getDeliveryDelay(): ?int
+    {
+        return null;
+    }
+
+    public function setPriority(int $priority = null): Producer
+    {
+        if (null === $priority) {
+            return $this;
+        }
+
+        throw PriorityNotSupportedException::providerDoestNotSupportIt();
+    }
+
+    public function getPriority(): ?int
+    {
+        return null;
+    }
+
+    public function setTimeToLive(int $timeToLive = null): Producer
+    {
+        if (null === $timeToLive) {
+            return $this;
+        }
+
+        throw new \LogicException('Not implemented');
+    }
+
+    public function getTimeToLive(): ?int
+    {
+        return null;
+    }
+}

vendor/enqueue/stomp/composer.json

@@ -0,0 +1,42 @@
+{
+    "name": "enqueue/stomp",
+    "type": "library",
+    "description": "Message Queue Stomp Transport",
+    "keywords": ["messaging", "queue", "stomp"],
+    "homepage": "https://enqueue.forma-pro.com/",
+    "license": "MIT",
+    "require": {
+        "php": "^7.1.3",
+        "enqueue/dsn": "^0.9",
+        "stomp-php/stomp-php": "^4",
+        "queue-interop/queue-interop": "^0.7|^0.8",
+        "php-http/guzzle6-adapter": "^1.1",
+        "php-http/client-common": "^1.7@dev",
+        "richardfullmer/rabbitmq-management-api": "^2.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "~5.4.0",
+        "enqueue/test": "0.9.x-dev",
+        "enqueue/null": "0.9.x-dev",
+        "queue-interop/queue-spec": "^0.6"
+    },
+    "support": {
+        "email": "opensource@forma-pro.com",
+        "issues": "https://github.com/php-enqueue/enqueue-dev/issues",
+        "forum": "https://gitter.im/php-enqueue/Lobby",
+        "source": "https://github.com/php-enqueue/enqueue-dev",
+        "docs": "https://github.com/php-enqueue/enqueue-dev/blob/master/docs/index.md"
+    },
+    "autoload": {
+        "psr-4": { "Enqueue\\Stomp\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "branch-alias": {
+            "dev-master": "0.9.x-dev"
+        }
+    }
+}

vendor/guzzlehttp/guzzle/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011-2018 Michael Dowling, https://github.com/mtdowling <mtdowling@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/guzzlehttp/guzzle/README.md

@@ -0,0 +1,91 @@
+Guzzle, PHP HTTP client
+=======================
+
+[![Latest Version](https://img.shields.io/github/release/guzzle/guzzle.svg?style=flat-square)](https://github.com/guzzle/guzzle/releases)
+[![Build Status](https://img.shields.io/travis/guzzle/guzzle.svg?style=flat-square)](https://travis-ci.org/guzzle/guzzle)
+[![Total Downloads](https://img.shields.io/packagist/dt/guzzlehttp/guzzle.svg?style=flat-square)](https://packagist.org/packages/guzzlehttp/guzzle)
+
+Guzzle is a PHP HTTP client that makes it easy to send HTTP requests and
+trivial to integrate with web services.
+
+- Simple interface for building query strings, POST requests, streaming large
+  uploads, streaming large downloads, using HTTP cookies, uploading JSON data,
+  etc...
+- Can send both synchronous and asynchronous requests using the same interface.
+- Uses PSR-7 interfaces for requests, responses, and streams. This allows you
+  to utilize other PSR-7 compatible libraries with Guzzle.
+- Abstracts away the underlying HTTP transport, allowing you to write
+  environment and transport agnostic code; i.e., no hard dependency on cURL,
+  PHP streams, sockets, or non-blocking event loops.
+- Middleware system allows you to augment and compose client behavior.
+
+```php
+$client = new \GuzzleHttp\Client();
+$res = $client->request('GET', 'https://api.github.com/repos/guzzle/guzzle');
+echo $res->getStatusCode();
+// 200
+echo $res->getHeaderLine('content-type');
+// 'application/json; charset=utf8'
+echo $res->getBody();
+// '{"id": 1420053, "name": "guzzle", ...}'
+
+// Send an asynchronous request.
+$request = new \GuzzleHttp\Psr7\Request('GET', 'http://httpbin.org');
+$promise = $client->sendAsync($request)->then(function ($response) {
+    echo 'I completed! ' . $response->getBody();
+});
+$promise->wait();
+```
+
+## Help and docs
+
+- [Documentation](http://guzzlephp.org/)
+- [Stack Overflow](http://stackoverflow.com/questions/tagged/guzzle)
+- [Gitter](https://gitter.im/guzzle/guzzle)
+
+
+## Installing Guzzle
+
+The recommended way to install Guzzle is through
+[Composer](http://getcomposer.org).
+
+```bash
+# Install Composer
+curl -sS https://getcomposer.org/installer | php
+```
+
+Next, run the Composer command to install the latest stable version of Guzzle:
+
+```bash
+php composer.phar require guzzlehttp/guzzle
+```
+
+After installing, you need to require Composer's autoloader:
+
+```php
+require 'vendor/autoload.php';
+```
+
+You can then later update Guzzle using composer:
+
+ ```bash
+composer.phar update
+ ```
+
+
+## Version Guidance
+
+| Version | Status     | Packagist           | Namespace    | Repo                | Docs                | PSR-7 | PHP Version |
+|---------|------------|---------------------|--------------|---------------------|---------------------|-------|-------------|
+| 3.x     | EOL        | `guzzle/guzzle`     | `Guzzle`     | [v3][guzzle-3-repo] | [v3][guzzle-3-docs] | No    | >= 5.3.3    |
+| 4.x     | EOL        | `guzzlehttp/guzzle` | `GuzzleHttp` | [v4][guzzle-4-repo] | N/A                 | No    | >= 5.4      |
+| 5.x     | Maintained | `guzzlehttp/guzzle` | `GuzzleHttp` | [v5][guzzle-5-repo] | [v5][guzzle-5-docs] | No    | >= 5.4      |
+| 6.x     | Latest     | `guzzlehttp/guzzle` | `GuzzleHttp` | [v6][guzzle-6-repo] | [v6][guzzle-6-docs] | Yes   | >= 5.5      |
+
+[guzzle-3-repo]: https://github.com/guzzle/guzzle3
+[guzzle-4-repo]: https://github.com/guzzle/guzzle/tree/4.x
+[guzzle-5-repo]: https://github.com/guzzle/guzzle/tree/5.3
+[guzzle-6-repo]: https://github.com/guzzle/guzzle
+[guzzle-3-docs]: http://guzzle3.readthedocs.org/en/latest/
+[guzzle-5-docs]: http://guzzle.readthedocs.org/en/5.3/
+[guzzle-6-docs]: http://guzzle.readthedocs.org/en/latest/

vendor/guzzlehttp/guzzle/composer.json

@@ -0,0 +1,44 @@
+{
+    "name": "guzzlehttp/guzzle",
+    "type": "library",
+    "description": "Guzzle is a PHP HTTP client library",
+    "keywords": ["framework", "http", "rest", "web service", "curl", "client", "HTTP client"],
+    "homepage": "http://guzzlephp.org/",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Michael Dowling",
+            "email": "mtdowling@gmail.com",
+            "homepage": "https://github.com/mtdowling"
+        }
+    ],
+    "require": {
+        "php": ">=5.5",
+        "guzzlehttp/psr7": "^1.4",
+        "guzzlehttp/promises": "^1.0"
+    },
+    "require-dev": {
+        "ext-curl": "*",
+        "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+        "psr/log": "^1.0"
+    },
+    "autoload": {
+        "files": ["src/functions_include.php"],
+        "psr-4": {
+            "GuzzleHttp\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "GuzzleHttp\\Tests\\": "tests/"
+        }
+    },
+    "suggest": {
+        "psr/log": "Required for using the Log middleware"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "6.3-dev"
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/Client.php

@@ -0,0 +1,422 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Cookie\CookieJar;
+use GuzzleHttp\Promise;
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\UriInterface;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * @method ResponseInterface get(string|UriInterface $uri, array $options = [])
+ * @method ResponseInterface head(string|UriInterface $uri, array $options = [])
+ * @method ResponseInterface put(string|UriInterface $uri, array $options = [])
+ * @method ResponseInterface post(string|UriInterface $uri, array $options = [])
+ * @method ResponseInterface patch(string|UriInterface $uri, array $options = [])
+ * @method ResponseInterface delete(string|UriInterface $uri, array $options = [])
+ * @method Promise\PromiseInterface getAsync(string|UriInterface $uri, array $options = [])
+ * @method Promise\PromiseInterface headAsync(string|UriInterface $uri, array $options = [])
+ * @method Promise\PromiseInterface putAsync(string|UriInterface $uri, array $options = [])
+ * @method Promise\PromiseInterface postAsync(string|UriInterface $uri, array $options = [])
+ * @method Promise\PromiseInterface patchAsync(string|UriInterface $uri, array $options = [])
+ * @method Promise\PromiseInterface deleteAsync(string|UriInterface $uri, array $options = [])
+ */
+class Client implements ClientInterface
+{
+    /** @var array Default request options */
+    private $config;
+
+    /**
+     * Clients accept an array of constructor parameters.
+     *
+     * Here's an example of creating a client using a base_uri and an array of
+     * default request options to apply to each request:
+     *
+     *     $client = new Client([
+     *         'base_uri'        => 'http://www.foo.com/1.0/',
+     *         'timeout'         => 0,
+     *         'allow_redirects' => false,
+     *         'proxy'           => '192.168.16.1:10'
+     *     ]);
+     *
+     * Client configuration settings include the following options:
+     *
+     * - handler: (callable) Function that transfers HTTP requests over the
+     *   wire. The function is called with a Psr7\Http\Message\RequestInterface
+     *   and array of transfer options, and must return a
+     *   GuzzleHttp\Promise\PromiseInterface that is fulfilled with a
+     *   Psr7\Http\Message\ResponseInterface on success. "handler" is a
+     *   constructor only option that cannot be overridden in per/request
+     *   options. If no handler is provided, a default handler will be created
+     *   that enables all of the request options below by attaching all of the
+     *   default middleware to the handler.
+     * - base_uri: (string|UriInterface) Base URI of the client that is merged
+     *   into relative URIs. Can be a string or instance of UriInterface.
+     * - **: any request option
+     *
+     * @param array $config Client configuration settings.
+     *
+     * @see \GuzzleHttp\RequestOptions for a list of available request options.
+     */
+    public function __construct(array $config = [])
+    {
+        if (!isset($config['handler'])) {
+            $config['handler'] = HandlerStack::create();
+        } elseif (!is_callable($config['handler'])) {
+            throw new \InvalidArgumentException('handler must be a callable');
+        }
+
+        // Convert the base_uri to a UriInterface
+        if (isset($config['base_uri'])) {
+            $config['base_uri'] = Psr7\uri_for($config['base_uri']);
+        }
+
+        $this->configureDefaults($config);
+    }
+
+    public function __call($method, $args)
+    {
+        if (count($args) < 1) {
+            throw new \InvalidArgumentException('Magic request methods require a URI and optional options array');
+        }
+
+        $uri = $args[0];
+        $opts = isset($args[1]) ? $args[1] : [];
+
+        return substr($method, -5) === 'Async'
+            ? $this->requestAsync(substr($method, 0, -5), $uri, $opts)
+            : $this->request($method, $uri, $opts);
+    }
+
+    public function sendAsync(RequestInterface $request, array $options = [])
+    {
+        // Merge the base URI into the request URI if needed.
+        $options = $this->prepareDefaults($options);
+
+        return $this->transfer(
+            $request->withUri($this->buildUri($request->getUri(), $options), $request->hasHeader('Host')),
+            $options
+        );
+    }
+
+    public function send(RequestInterface $request, array $options = [])
+    {
+        $options[RequestOptions::SYNCHRONOUS] = true;
+        return $this->sendAsync($request, $options)->wait();
+    }
+
+    public function requestAsync($method, $uri = '', array $options = [])
+    {
+        $options = $this->prepareDefaults($options);
+        // Remove request modifying parameter because it can be done up-front.
+        $headers = isset($options['headers']) ? $options['headers'] : [];
+        $body = isset($options['body']) ? $options['body'] : null;
+        $version = isset($options['version']) ? $options['version'] : '1.1';
+        // Merge the URI into the base URI.
+        $uri = $this->buildUri($uri, $options);
+        if (is_array($body)) {
+            $this->invalidBody();
+        }
+        $request = new Psr7\Request($method, $uri, $headers, $body, $version);
+        // Remove the option so that they are not doubly-applied.
+        unset($options['headers'], $options['body'], $options['version']);
+
+        return $this->transfer($request, $options);
+    }
+
+    public function request($method, $uri = '', array $options = [])
+    {
+        $options[RequestOptions::SYNCHRONOUS] = true;
+        return $this->requestAsync($method, $uri, $options)->wait();
+    }
+
+    public function getConfig($option = null)
+    {
+        return $option === null
+            ? $this->config
+            : (isset($this->config[$option]) ? $this->config[$option] : null);
+    }
+
+    private function buildUri($uri, array $config)
+    {
+        // for BC we accept null which would otherwise fail in uri_for
+        $uri = Psr7\uri_for($uri === null ? '' : $uri);
+
+        if (isset($config['base_uri'])) {
+            $uri = Psr7\UriResolver::resolve(Psr7\uri_for($config['base_uri']), $uri);
+        }
+
+        return $uri->getScheme() === '' && $uri->getHost() !== '' ? $uri->withScheme('http') : $uri;
+    }
+
+    /**
+     * Configures the default options for a client.
+     *
+     * @param array $config
+     */
+    private function configureDefaults(array $config)
+    {
+        $defaults = [
+            'allow_redirects' => RedirectMiddleware::$defaultSettings,
+            'http_errors'     => true,
+            'decode_content'  => true,
+            'verify'          => true,
+            'cookies'         => false
+        ];
+
+        // Use the standard Linux HTTP_PROXY and HTTPS_PROXY if set.
+
+        // We can only trust the HTTP_PROXY environment variable in a CLI
+        // process due to the fact that PHP has no reliable mechanism to
+        // get environment variables that start with "HTTP_".
+        if (php_sapi_name() == 'cli' && getenv('HTTP_PROXY')) {
+            $defaults['proxy']['http'] = getenv('HTTP_PROXY');
+        }
+
+        if ($proxy = getenv('HTTPS_PROXY')) {
+            $defaults['proxy']['https'] = $proxy;
+        }
+
+        if ($noProxy = getenv('NO_PROXY')) {
+            $cleanedNoProxy = str_replace(' ', '', $noProxy);
+            $defaults['proxy']['no'] = explode(',', $cleanedNoProxy);
+        }
+
+        $this->config = $config + $defaults;
+
+        if (!empty($config['cookies']) && $config['cookies'] === true) {
+            $this->config['cookies'] = new CookieJar();
+        }
+
+        // Add the default user-agent header.
+        if (!isset($this->config['headers'])) {
+            $this->config['headers'] = ['User-Agent' => default_user_agent()];
+        } else {
+            // Add the User-Agent header if one was not already set.
+            foreach (array_keys($this->config['headers']) as $name) {
+                if (strtolower($name) === 'user-agent') {
+                    return;
+                }
+            }
+            $this->config['headers']['User-Agent'] = default_user_agent();
+        }
+    }
+
+    /**
+     * Merges default options into the array.
+     *
+     * @param array $options Options to modify by reference
+     *
+     * @return array
+     */
+    private function prepareDefaults($options)
+    {
+        $defaults = $this->config;
+
+        if (!empty($defaults['headers'])) {
+            // Default headers are only added if they are not present.
+            $defaults['_conditional'] = $defaults['headers'];
+            unset($defaults['headers']);
+        }
+
+        // Special handling for headers is required as they are added as
+        // conditional headers and as headers passed to a request ctor.
+        if (array_key_exists('headers', $options)) {
+            // Allows default headers to be unset.
+            if ($options['headers'] === null) {
+                $defaults['_conditional'] = null;
+                unset($options['headers']);
+            } elseif (!is_array($options['headers'])) {
+                throw new \InvalidArgumentException('headers must be an array');
+            }
+        }
+
+        // Shallow merge defaults underneath options.
+        $result = $options + $defaults;
+
+        // Remove null values.
+        foreach ($result as $k => $v) {
+            if ($v === null) {
+                unset($result[$k]);
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Transfers the given request and applies request options.
+     *
+     * The URI of the request is not modified and the request options are used
+     * as-is without merging in default options.
+     *
+     * @param RequestInterface $request
+     * @param array            $options
+     *
+     * @return Promise\PromiseInterface
+     */
+    private function transfer(RequestInterface $request, array $options)
+    {
+        // save_to -> sink
+        if (isset($options['save_to'])) {
+            $options['sink'] = $options['save_to'];
+            unset($options['save_to']);
+        }
+
+        // exceptions -> http_errors
+        if (isset($options['exceptions'])) {
+            $options['http_errors'] = $options['exceptions'];
+            unset($options['exceptions']);
+        }
+
+        $request = $this->applyOptions($request, $options);
+        $handler = $options['handler'];
+
+        try {
+            return Promise\promise_for($handler($request, $options));
+        } catch (\Exception $e) {
+            return Promise\rejection_for($e);
+        }
+    }
+
+    /**
+     * Applies the array of request options to a request.
+     *
+     * @param RequestInterface $request
+     * @param array            $options
+     *
+     * @return RequestInterface
+     */
+    private function applyOptions(RequestInterface $request, array &$options)
+    {
+        $modify = [
+            'set_headers' => [],
+        ];
+
+        if (isset($options['headers'])) {
+            $modify['set_headers'] = $options['headers'];
+            unset($options['headers']);
+        }
+
+        if (isset($options['form_params'])) {
+            if (isset($options['multipart'])) {
+                throw new \InvalidArgumentException('You cannot use '
+                    . 'form_params and multipart at the same time. Use the '
+                    . 'form_params option if you want to send application/'
+                    . 'x-www-form-urlencoded requests, and the multipart '
+                    . 'option to send multipart/form-data requests.');
+            }
+            $options['body'] = http_build_query($options['form_params'], '', '&');
+            unset($options['form_params']);
+            // Ensure that we don't have the header in different case and set the new value.
+            $options['_conditional'] = Psr7\_caseless_remove(['Content-Type'], $options['_conditional']);
+            $options['_conditional']['Content-Type'] = 'application/x-www-form-urlencoded';
+        }
+
+        if (isset($options['multipart'])) {
+            $options['body'] = new Psr7\MultipartStream($options['multipart']);
+            unset($options['multipart']);
+        }
+
+        if (isset($options['json'])) {
+            $options['body'] = \GuzzleHttp\json_encode($options['json']);
+            unset($options['json']);
+            // Ensure that we don't have the header in different case and set the new value.
+            $options['_conditional'] = Psr7\_caseless_remove(['Content-Type'], $options['_conditional']);
+            $options['_conditional']['Content-Type'] = 'application/json';
+        }
+
+        if (!empty($options['decode_content'])
+            && $options['decode_content'] !== true
+        ) {
+            // Ensure that we don't have the header in different case and set the new value.
+            $options['_conditional'] = Psr7\_caseless_remove(['Accept-Encoding'], $options['_conditional']);
+            $modify['set_headers']['Accept-Encoding'] = $options['decode_content'];
+        }
+
+        if (isset($options['body'])) {
+            if (is_array($options['body'])) {
+                $this->invalidBody();
+            }
+            $modify['body'] = Psr7\stream_for($options['body']);
+            unset($options['body']);
+        }
+
+        if (!empty($options['auth']) && is_array($options['auth'])) {
+            $value = $options['auth'];
+            $type = isset($value[2]) ? strtolower($value[2]) : 'basic';
+            switch ($type) {
+                case 'basic':
+                    // Ensure that we don't have the header in different case and set the new value.
+                    $modify['set_headers'] = Psr7\_caseless_remove(['Authorization'], $modify['set_headers']);
+                    $modify['set_headers']['Authorization'] = 'Basic '
+                        . base64_encode("$value[0]:$value[1]");
+                    break;
+                case 'digest':
+                    // @todo: Do not rely on curl
+                    $options['curl'][CURLOPT_HTTPAUTH] = CURLAUTH_DIGEST;
+                    $options['curl'][CURLOPT_USERPWD] = "$value[0]:$value[1]";
+                    break;
+                case 'ntlm':
+                    $options['curl'][CURLOPT_HTTPAUTH] = CURLAUTH_NTLM;
+                    $options['curl'][CURLOPT_USERPWD] = "$value[0]:$value[1]";
+                    break;
+            }
+        }
+
+        if (isset($options['query'])) {
+            $value = $options['query'];
+            if (is_array($value)) {
+                $value = http_build_query($value, null, '&', PHP_QUERY_RFC3986);
+            }
+            if (!is_string($value)) {
+                throw new \InvalidArgumentException('query must be a string or array');
+            }
+            $modify['query'] = $value;
+            unset($options['query']);
+        }
+
+        // Ensure that sink is not an invalid value.
+        if (isset($options['sink'])) {
+            // TODO: Add more sink validation?
+            if (is_bool($options['sink'])) {
+                throw new \InvalidArgumentException('sink must not be a boolean');
+            }
+        }
+
+        $request = Psr7\modify_request($request, $modify);
+        if ($request->getBody() instanceof Psr7\MultipartStream) {
+            // Use a multipart/form-data POST if a Content-Type is not set.
+            // Ensure that we don't have the header in different case and set the new value.
+            $options['_conditional'] = Psr7\_caseless_remove(['Content-Type'], $options['_conditional']);
+            $options['_conditional']['Content-Type'] = 'multipart/form-data; boundary='
+                . $request->getBody()->getBoundary();
+        }
+
+        // Merge in conditional headers if they are not present.
+        if (isset($options['_conditional'])) {
+            // Build up the changes so it's in a single clone of the message.
+            $modify = [];
+            foreach ($options['_conditional'] as $k => $v) {
+                if (!$request->hasHeader($k)) {
+                    $modify['set_headers'][$k] = $v;
+                }
+            }
+            $request = Psr7\modify_request($request, $modify);
+            // Don't pass this internal value along to middleware/handlers.
+            unset($options['_conditional']);
+        }
+
+        return $request;
+    }
+
+    private function invalidBody()
+    {
+        throw new \InvalidArgumentException('Passing in the "body" request '
+            . 'option as an array to send a POST request has been deprecated. '
+            . 'Please use the "form_params" request option to send a '
+            . 'application/x-www-form-urlencoded request, or the "multipart" '
+            . 'request option to send a multipart/form-data request.');
+    }
+}

vendor/guzzlehttp/guzzle/src/ClientInterface.php

@@ -0,0 +1,84 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Exception\GuzzleException;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\UriInterface;
+
+/**
+ * Client interface for sending HTTP requests.
+ */
+interface ClientInterface
+{
+    const VERSION = '6.3.3';
+
+    /**
+     * Send an HTTP request.
+     *
+     * @param RequestInterface $request Request to send
+     * @param array            $options Request options to apply to the given
+     *                                  request and to the transfer.
+     *
+     * @return ResponseInterface
+     * @throws GuzzleException
+     */
+    public function send(RequestInterface $request, array $options = []);
+
+    /**
+     * Asynchronously send an HTTP request.
+     *
+     * @param RequestInterface $request Request to send
+     * @param array            $options Request options to apply to the given
+     *                                  request and to the transfer.
+     *
+     * @return PromiseInterface
+     */
+    public function sendAsync(RequestInterface $request, array $options = []);
+
+    /**
+     * Create and send an HTTP request.
+     *
+     * Use an absolute path to override the base path of the client, or a
+     * relative path to append to the base path of the client. The URL can
+     * contain the query string as well.
+     *
+     * @param string              $method  HTTP method.
+     * @param string|UriInterface $uri     URI object or string.
+     * @param array               $options Request options to apply.
+     *
+     * @return ResponseInterface
+     * @throws GuzzleException
+     */
+    public function request($method, $uri, array $options = []);
+
+    /**
+     * Create and send an asynchronous HTTP request.
+     *
+     * Use an absolute path to override the base path of the client, or a
+     * relative path to append to the base path of the client. The URL can
+     * contain the query string as well. Use an array to provide a URL
+     * template and additional variables to use in the URL template expansion.
+     *
+     * @param string              $method  HTTP method
+     * @param string|UriInterface $uri     URI object or string.
+     * @param array               $options Request options to apply.
+     *
+     * @return PromiseInterface
+     */
+    public function requestAsync($method, $uri, array $options = []);
+
+    /**
+     * Get a client configuration option.
+     *
+     * These options include default request options of the client, a "handler"
+     * (if utilized by the concrete client), and a "base_uri" if utilized by
+     * the concrete client.
+     *
+     * @param string|null $option The config option to retrieve.
+     *
+     * @return mixed
+     */
+    public function getConfig($option = null);
+}

vendor/guzzlehttp/guzzle/src/Cookie/CookieJar.php

@@ -0,0 +1,314 @@
+<?php
+namespace GuzzleHttp\Cookie;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Cookie jar that stores cookies as an array
+ */
+class CookieJar implements CookieJarInterface
+{
+    /** @var SetCookie[] Loaded cookie data */
+    private $cookies = [];
+
+    /** @var bool */
+    private $strictMode;
+
+    /**
+     * @param bool $strictMode   Set to true to throw exceptions when invalid
+     *                           cookies are added to the cookie jar.
+     * @param array $cookieArray Array of SetCookie objects or a hash of
+     *                           arrays that can be used with the SetCookie
+     *                           constructor
+     */
+    public function __construct($strictMode = false, $cookieArray = [])
+    {
+        $this->strictMode = $strictMode;
+
+        foreach ($cookieArray as $cookie) {
+            if (!($cookie instanceof SetCookie)) {
+                $cookie = new SetCookie($cookie);
+            }
+            $this->setCookie($cookie);
+        }
+    }
+
+    /**
+     * Create a new Cookie jar from an associative array and domain.
+     *
+     * @param array  $cookies Cookies to create the jar from
+     * @param string $domain  Domain to set the cookies to
+     *
+     * @return self
+     */
+    public static function fromArray(array $cookies, $domain)
+    {
+        $cookieJar = new self();
+        foreach ($cookies as $name => $value) {
+            $cookieJar->setCookie(new SetCookie([
+                'Domain'  => $domain,
+                'Name'    => $name,
+                'Value'   => $value,
+                'Discard' => true
+            ]));
+        }
+
+        return $cookieJar;
+    }
+
+    /**
+     * @deprecated
+     */
+    public static function getCookieValue($value)
+    {
+        return $value;
+    }
+
+    /**
+     * Evaluate if this cookie should be persisted to storage
+     * that survives between requests.
+     *
+     * @param SetCookie $cookie Being evaluated.
+     * @param bool $allowSessionCookies If we should persist session cookies
+     * @return bool
+     */
+    public static function shouldPersist(
+        SetCookie $cookie,
+        $allowSessionCookies = false
+    ) {
+        if ($cookie->getExpires() || $allowSessionCookies) {
+            if (!$cookie->getDiscard()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Finds and returns the cookie based on the name
+     *
+     * @param string $name cookie name to search for
+     * @return SetCookie|null cookie that was found or null if not found
+     */
+    public function getCookieByName($name)
+    {
+        // don't allow a null name
+        if ($name === null) {
+            return null;
+        }
+        foreach ($this->cookies as $cookie) {
+            if ($cookie->getName() !== null && strcasecmp($cookie->getName(), $name) === 0) {
+                return $cookie;
+            }
+        }
+    }
+
+    public function toArray()
+    {
+        return array_map(function (SetCookie $cookie) {
+            return $cookie->toArray();
+        }, $this->getIterator()->getArrayCopy());
+    }
+
+    public function clear($domain = null, $path = null, $name = null)
+    {
+        if (!$domain) {
+            $this->cookies = [];
+            return;
+        } elseif (!$path) {
+            $this->cookies = array_filter(
+                $this->cookies,
+                function (SetCookie $cookie) use ($path, $domain) {
+                    return !$cookie->matchesDomain($domain);
+                }
+            );
+        } elseif (!$name) {
+            $this->cookies = array_filter(
+                $this->cookies,
+                function (SetCookie $cookie) use ($path, $domain) {
+                    return !($cookie->matchesPath($path) &&
+                        $cookie->matchesDomain($domain));
+                }
+            );
+        } else {
+            $this->cookies = array_filter(
+                $this->cookies,
+                function (SetCookie $cookie) use ($path, $domain, $name) {
+                    return !($cookie->getName() == $name &&
+                        $cookie->matchesPath($path) &&
+                        $cookie->matchesDomain($domain));
+                }
+            );
+        }
+    }
+
+    public function clearSessionCookies()
+    {
+        $this->cookies = array_filter(
+            $this->cookies,
+            function (SetCookie $cookie) {
+                return !$cookie->getDiscard() && $cookie->getExpires();
+            }
+        );
+    }
+
+    public function setCookie(SetCookie $cookie)
+    {
+        // If the name string is empty (but not 0), ignore the set-cookie
+        // string entirely.
+        $name = $cookie->getName();
+        if (!$name && $name !== '0') {
+            return false;
+        }
+
+        // Only allow cookies with set and valid domain, name, value
+        $result = $cookie->validate();
+        if ($result !== true) {
+            if ($this->strictMode) {
+                throw new \RuntimeException('Invalid cookie: ' . $result);
+            } else {
+                $this->removeCookieIfEmpty($cookie);
+                return false;
+            }
+        }
+
+        // Resolve conflicts with previously set cookies
+        foreach ($this->cookies as $i => $c) {
+
+            // Two cookies are identical, when their path, and domain are
+            // identical.
+            if ($c->getPath() != $cookie->getPath() ||
+                $c->getDomain() != $cookie->getDomain() ||
+                $c->getName() != $cookie->getName()
+            ) {
+                continue;
+            }
+
+            // The previously set cookie is a discard cookie and this one is
+            // not so allow the new cookie to be set
+            if (!$cookie->getDiscard() && $c->getDiscard()) {
+                unset($this->cookies[$i]);
+                continue;
+            }
+
+            // If the new cookie's expiration is further into the future, then
+            // replace the old cookie
+            if ($cookie->getExpires() > $c->getExpires()) {
+                unset($this->cookies[$i]);
+                continue;
+            }
+
+            // If the value has changed, we better change it
+            if ($cookie->getValue() !== $c->getValue()) {
+                unset($this->cookies[$i]);
+                continue;
+            }
+
+            // The cookie exists, so no need to continue
+            return false;
+        }
+
+        $this->cookies[] = $cookie;
+
+        return true;
+    }
+
+    public function count()
+    {
+        return count($this->cookies);
+    }
+
+    public function getIterator()
+    {
+        return new \ArrayIterator(array_values($this->cookies));
+    }
+
+    public function extractCookies(
+        RequestInterface $request,
+        ResponseInterface $response
+    ) {
+        if ($cookieHeader = $response->getHeader('Set-Cookie')) {
+            foreach ($cookieHeader as $cookie) {
+                $sc = SetCookie::fromString($cookie);
+                if (!$sc->getDomain()) {
+                    $sc->setDomain($request->getUri()->getHost());
+                }
+                if (0 !== strpos($sc->getPath(), '/')) {
+                    $sc->setPath($this->getCookiePathFromRequest($request));
+                }
+                $this->setCookie($sc);
+            }
+        }
+    }
+
+    /**
+     * Computes cookie path following RFC 6265 section 5.1.4
+     *
+     * @link https://tools.ietf.org/html/rfc6265#section-5.1.4
+     *
+     * @param RequestInterface $request
+     * @return string
+     */
+    private function getCookiePathFromRequest(RequestInterface $request)
+    {
+        $uriPath = $request->getUri()->getPath();
+        if (''  === $uriPath) {
+            return '/';
+        }
+        if (0 !== strpos($uriPath, '/')) {
+            return '/';
+        }
+        if ('/' === $uriPath) {
+            return '/';
+        }
+        if (0 === $lastSlashPos = strrpos($uriPath, '/')) {
+            return '/';
+        }
+
+        return substr($uriPath, 0, $lastSlashPos);
+    }
+
+    public function withCookieHeader(RequestInterface $request)
+    {
+        $values = [];
+        $uri = $request->getUri();
+        $scheme = $uri->getScheme();
+        $host = $uri->getHost();
+        $path = $uri->getPath() ?: '/';
+
+        foreach ($this->cookies as $cookie) {
+            if ($cookie->matchesPath($path) &&
+                $cookie->matchesDomain($host) &&
+                !$cookie->isExpired() &&
+                (!$cookie->getSecure() || $scheme === 'https')
+            ) {
+                $values[] = $cookie->getName() . '='
+                    . $cookie->getValue();
+            }
+        }
+
+        return $values
+            ? $request->withHeader('Cookie', implode('; ', $values))
+            : $request;
+    }
+
+    /**
+     * If a cookie already exists and the server asks to set it again with a
+     * null value, the cookie must be deleted.
+     *
+     * @param SetCookie $cookie
+     */
+    private function removeCookieIfEmpty(SetCookie $cookie)
+    {
+        $cookieValue = $cookie->getValue();
+        if ($cookieValue === null || $cookieValue === '') {
+            $this->clear(
+                $cookie->getDomain(),
+                $cookie->getPath(),
+                $cookie->getName()
+            );
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/Cookie/CookieJarInterface.php

@@ -0,0 +1,84 @@
+<?php
+namespace GuzzleHttp\Cookie;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Stores HTTP cookies.
+ *
+ * It extracts cookies from HTTP requests, and returns them in HTTP responses.
+ * CookieJarInterface instances automatically expire contained cookies when
+ * necessary. Subclasses are also responsible for storing and retrieving
+ * cookies from a file, database, etc.
+ *
+ * @link http://docs.python.org/2/library/cookielib.html Inspiration
+ */
+interface CookieJarInterface extends \Countable, \IteratorAggregate
+{
+    /**
+     * Create a request with added cookie headers.
+     *
+     * If no matching cookies are found in the cookie jar, then no Cookie
+     * header is added to the request and the same request is returned.
+     *
+     * @param RequestInterface $request Request object to modify.
+     *
+     * @return RequestInterface returns the modified request.
+     */
+    public function withCookieHeader(RequestInterface $request);
+
+    /**
+     * Extract cookies from an HTTP response and store them in the CookieJar.
+     *
+     * @param RequestInterface  $request  Request that was sent
+     * @param ResponseInterface $response Response that was received
+     */
+    public function extractCookies(
+        RequestInterface $request,
+        ResponseInterface $response
+    );
+
+    /**
+     * Sets a cookie in the cookie jar.
+     *
+     * @param SetCookie $cookie Cookie to set.
+     *
+     * @return bool Returns true on success or false on failure
+     */
+    public function setCookie(SetCookie $cookie);
+
+    /**
+     * Remove cookies currently held in the cookie jar.
+     *
+     * Invoking this method without arguments will empty the whole cookie jar.
+     * If given a $domain argument only cookies belonging to that domain will
+     * be removed. If given a $domain and $path argument, cookies belonging to
+     * the specified path within that domain are removed. If given all three
+     * arguments, then the cookie with the specified name, path and domain is
+     * removed.
+     *
+     * @param string $domain Clears cookies matching a domain
+     * @param string $path   Clears cookies matching a domain and path
+     * @param string $name   Clears cookies matching a domain, path, and name
+     *
+     * @return CookieJarInterface
+     */
+    public function clear($domain = null, $path = null, $name = null);
+
+    /**
+     * Discard all sessions cookies.
+     *
+     * Removes cookies that don't have an expire field or a have a discard
+     * field set to true. To be called when the user agent shuts down according
+     * to RFC 2965.
+     */
+    public function clearSessionCookies();
+
+    /**
+     * Converts the cookie jar to an array.
+     *
+     * @return array
+     */
+    public function toArray();
+}

vendor/guzzlehttp/guzzle/src/Cookie/FileCookieJar.php

@@ -0,0 +1,90 @@
+<?php
+namespace GuzzleHttp\Cookie;
+
+/**
+ * Persists non-session cookies using a JSON formatted file
+ */
+class FileCookieJar extends CookieJar
+{
+    /** @var string filename */
+    private $filename;
+
+    /** @var bool Control whether to persist session cookies or not. */
+    private $storeSessionCookies;
+
+    /**
+     * Create a new FileCookieJar object
+     *
+     * @param string $cookieFile        File to store the cookie data
+     * @param bool $storeSessionCookies Set to true to store session cookies
+     *                                  in the cookie jar.
+     *
+     * @throws \RuntimeException if the file cannot be found or created
+     */
+    public function __construct($cookieFile, $storeSessionCookies = false)
+    {
+        $this->filename = $cookieFile;
+        $this->storeSessionCookies = $storeSessionCookies;
+
+        if (file_exists($cookieFile)) {
+            $this->load($cookieFile);
+        }
+    }
+
+    /**
+     * Saves the file when shutting down
+     */
+    public function __destruct()
+    {
+        $this->save($this->filename);
+    }
+
+    /**
+     * Saves the cookies to a file.
+     *
+     * @param string $filename File to save
+     * @throws \RuntimeException if the file cannot be found or created
+     */
+    public function save($filename)
+    {
+        $json = [];
+        foreach ($this as $cookie) {
+            /** @var SetCookie $cookie */
+            if (CookieJar::shouldPersist($cookie, $this->storeSessionCookies)) {
+                $json[] = $cookie->toArray();
+            }
+        }
+
+        $jsonStr = \GuzzleHttp\json_encode($json);
+        if (false === file_put_contents($filename, $jsonStr)) {
+            throw new \RuntimeException("Unable to save file {$filename}");
+        }
+    }
+
+    /**
+     * Load cookies from a JSON formatted file.
+     *
+     * Old cookies are kept unless overwritten by newly loaded ones.
+     *
+     * @param string $filename Cookie file to load.
+     * @throws \RuntimeException if the file cannot be loaded.
+     */
+    public function load($filename)
+    {
+        $json = file_get_contents($filename);
+        if (false === $json) {
+            throw new \RuntimeException("Unable to load file {$filename}");
+        } elseif ($json === '') {
+            return;
+        }
+
+        $data = \GuzzleHttp\json_decode($json, true);
+        if (is_array($data)) {
+            foreach (json_decode($json, true) as $cookie) {
+                $this->setCookie(new SetCookie($cookie));
+            }
+        } elseif (strlen($data)) {
+            throw new \RuntimeException("Invalid cookie file: {$filename}");
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/Cookie/SessionCookieJar.php

@@ -0,0 +1,71 @@
+<?php
+namespace GuzzleHttp\Cookie;
+
+/**
+ * Persists cookies in the client session
+ */
+class SessionCookieJar extends CookieJar
+{
+    /** @var string session key */
+    private $sessionKey;
+    
+    /** @var bool Control whether to persist session cookies or not. */
+    private $storeSessionCookies;
+
+    /**
+     * Create a new SessionCookieJar object
+     *
+     * @param string $sessionKey        Session key name to store the cookie
+     *                                  data in session
+     * @param bool $storeSessionCookies Set to true to store session cookies
+     *                                  in the cookie jar.
+     */
+    public function __construct($sessionKey, $storeSessionCookies = false)
+    {
+        $this->sessionKey = $sessionKey;
+        $this->storeSessionCookies = $storeSessionCookies;
+        $this->load();
+    }
+
+    /**
+     * Saves cookies to session when shutting down
+     */
+    public function __destruct()
+    {
+        $this->save();
+    }
+
+    /**
+     * Save cookies to the client session
+     */
+    public function save()
+    {
+        $json = [];
+        foreach ($this as $cookie) {
+            /** @var SetCookie $cookie */
+            if (CookieJar::shouldPersist($cookie, $this->storeSessionCookies)) {
+                $json[] = $cookie->toArray();
+            }
+        }
+
+        $_SESSION[$this->sessionKey] = json_encode($json);
+    }
+
+    /**
+     * Load the contents of the client session into the data array
+     */
+    protected function load()
+    {
+        if (!isset($_SESSION[$this->sessionKey])) {
+            return;
+        }
+        $data = json_decode($_SESSION[$this->sessionKey], true);
+        if (is_array($data)) {
+            foreach ($data as $cookie) {
+                $this->setCookie(new SetCookie($cookie));
+            }
+        } elseif (strlen($data)) {
+            throw new \RuntimeException("Invalid cookie data");
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/Cookie/SetCookie.php

@@ -0,0 +1,403 @@
+<?php
+namespace GuzzleHttp\Cookie;
+
+/**
+ * Set-Cookie object
+ */
+class SetCookie
+{
+    /** @var array */
+    private static $defaults = [
+        'Name'     => null,
+        'Value'    => null,
+        'Domain'   => null,
+        'Path'     => '/',
+        'Max-Age'  => null,
+        'Expires'  => null,
+        'Secure'   => false,
+        'Discard'  => false,
+        'HttpOnly' => false
+    ];
+
+    /** @var array Cookie data */
+    private $data;
+
+    /**
+     * Create a new SetCookie object from a string
+     *
+     * @param string $cookie Set-Cookie header string
+     *
+     * @return self
+     */
+    public static function fromString($cookie)
+    {
+        // Create the default return array
+        $data = self::$defaults;
+        // Explode the cookie string using a series of semicolons
+        $pieces = array_filter(array_map('trim', explode(';', $cookie)));
+        // The name of the cookie (first kvp) must exist and include an equal sign.
+        if (empty($pieces[0]) || !strpos($pieces[0], '=')) {
+            return new self($data);
+        }
+
+        // Add the cookie pieces into the parsed data array
+        foreach ($pieces as $part) {
+            $cookieParts = explode('=', $part, 2);
+            $key = trim($cookieParts[0]);
+            $value = isset($cookieParts[1])
+                ? trim($cookieParts[1], " \n\r\t\0\x0B")
+                : true;
+
+            // Only check for non-cookies when cookies have been found
+            if (empty($data['Name'])) {
+                $data['Name'] = $key;
+                $data['Value'] = $value;
+            } else {
+                foreach (array_keys(self::$defaults) as $search) {
+                    if (!strcasecmp($search, $key)) {
+                        $data[$search] = $value;
+                        continue 2;
+                    }
+                }
+                $data[$key] = $value;
+            }
+        }
+
+        return new self($data);
+    }
+
+    /**
+     * @param array $data Array of cookie data provided by a Cookie parser
+     */
+    public function __construct(array $data = [])
+    {
+        $this->data = array_replace(self::$defaults, $data);
+        // Extract the Expires value and turn it into a UNIX timestamp if needed
+        if (!$this->getExpires() && $this->getMaxAge()) {
+            // Calculate the Expires date
+            $this->setExpires(time() + $this->getMaxAge());
+        } elseif ($this->getExpires() && !is_numeric($this->getExpires())) {
+            $this->setExpires($this->getExpires());
+        }
+    }
+
+    public function __toString()
+    {
+        $str = $this->data['Name'] . '=' . $this->data['Value'] . '; ';
+        foreach ($this->data as $k => $v) {
+            if ($k !== 'Name' && $k !== 'Value' && $v !== null && $v !== false) {
+                if ($k === 'Expires') {
+                    $str .= 'Expires=' . gmdate('D, d M Y H:i:s \G\M\T', $v) . '; ';
+                } else {
+                    $str .= ($v === true ? $k : "{$k}={$v}") . '; ';
+                }
+            }
+        }
+
+        return rtrim($str, '; ');
+    }
+
+    public function toArray()
+    {
+        return $this->data;
+    }
+
+    /**
+     * Get the cookie name
+     *
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->data['Name'];
+    }
+
+    /**
+     * Set the cookie name
+     *
+     * @param string $name Cookie name
+     */
+    public function setName($name)
+    {
+        $this->data['Name'] = $name;
+    }
+
+    /**
+     * Get the cookie value
+     *
+     * @return string
+     */
+    public function getValue()
+    {
+        return $this->data['Value'];
+    }
+
+    /**
+     * Set the cookie value
+     *
+     * @param string $value Cookie value
+     */
+    public function setValue($value)
+    {
+        $this->data['Value'] = $value;
+    }
+
+    /**
+     * Get the domain
+     *
+     * @return string|null
+     */
+    public function getDomain()
+    {
+        return $this->data['Domain'];
+    }
+
+    /**
+     * Set the domain of the cookie
+     *
+     * @param string $domain
+     */
+    public function setDomain($domain)
+    {
+        $this->data['Domain'] = $domain;
+    }
+
+    /**
+     * Get the path
+     *
+     * @return string
+     */
+    public function getPath()
+    {
+        return $this->data['Path'];
+    }
+
+    /**
+     * Set the path of the cookie
+     *
+     * @param string $path Path of the cookie
+     */
+    public function setPath($path)
+    {
+        $this->data['Path'] = $path;
+    }
+
+    /**
+     * Maximum lifetime of the cookie in seconds
+     *
+     * @return int|null
+     */
+    public function getMaxAge()
+    {
+        return $this->data['Max-Age'];
+    }
+
+    /**
+     * Set the max-age of the cookie
+     *
+     * @param int $maxAge Max age of the cookie in seconds
+     */
+    public function setMaxAge($maxAge)
+    {
+        $this->data['Max-Age'] = $maxAge;
+    }
+
+    /**
+     * The UNIX timestamp when the cookie Expires
+     *
+     * @return mixed
+     */
+    public function getExpires()
+    {
+        return $this->data['Expires'];
+    }
+
+    /**
+     * Set the unix timestamp for which the cookie will expire
+     *
+     * @param int $timestamp Unix timestamp
+     */
+    public function setExpires($timestamp)
+    {
+        $this->data['Expires'] = is_numeric($timestamp)
+            ? (int) $timestamp
+            : strtotime($timestamp);
+    }
+
+    /**
+     * Get whether or not this is a secure cookie
+     *
+     * @return null|bool
+     */
+    public function getSecure()
+    {
+        return $this->data['Secure'];
+    }
+
+    /**
+     * Set whether or not the cookie is secure
+     *
+     * @param bool $secure Set to true or false if secure
+     */
+    public function setSecure($secure)
+    {
+        $this->data['Secure'] = $secure;
+    }
+
+    /**
+     * Get whether or not this is a session cookie
+     *
+     * @return null|bool
+     */
+    public function getDiscard()
+    {
+        return $this->data['Discard'];
+    }
+
+    /**
+     * Set whether or not this is a session cookie
+     *
+     * @param bool $discard Set to true or false if this is a session cookie
+     */
+    public function setDiscard($discard)
+    {
+        $this->data['Discard'] = $discard;
+    }
+
+    /**
+     * Get whether or not this is an HTTP only cookie
+     *
+     * @return bool
+     */
+    public function getHttpOnly()
+    {
+        return $this->data['HttpOnly'];
+    }
+
+    /**
+     * Set whether or not this is an HTTP only cookie
+     *
+     * @param bool $httpOnly Set to true or false if this is HTTP only
+     */
+    public function setHttpOnly($httpOnly)
+    {
+        $this->data['HttpOnly'] = $httpOnly;
+    }
+
+    /**
+     * Check if the cookie matches a path value.
+     *
+     * A request-path path-matches a given cookie-path if at least one of
+     * the following conditions holds:
+     *
+     * - The cookie-path and the request-path are identical.
+     * - The cookie-path is a prefix of the request-path, and the last
+     *   character of the cookie-path is %x2F ("/").
+     * - The cookie-path is a prefix of the request-path, and the first
+     *   character of the request-path that is not included in the cookie-
+     *   path is a %x2F ("/") character.
+     *
+     * @param string $requestPath Path to check against
+     *
+     * @return bool
+     */
+    public function matchesPath($requestPath)
+    {
+        $cookiePath = $this->getPath();
+
+        // Match on exact matches or when path is the default empty "/"
+        if ($cookiePath === '/' || $cookiePath == $requestPath) {
+            return true;
+        }
+
+        // Ensure that the cookie-path is a prefix of the request path.
+        if (0 !== strpos($requestPath, $cookiePath)) {
+            return false;
+        }
+
+        // Match if the last character of the cookie-path is "/"
+        if (substr($cookiePath, -1, 1) === '/') {
+            return true;
+        }
+
+        // Match if the first character not included in cookie path is "/"
+        return substr($requestPath, strlen($cookiePath), 1) === '/';
+    }
+
+    /**
+     * Check if the cookie matches a domain value
+     *
+     * @param string $domain Domain to check against
+     *
+     * @return bool
+     */
+    public function matchesDomain($domain)
+    {
+        // Remove the leading '.' as per spec in RFC 6265.
+        // http://tools.ietf.org/html/rfc6265#section-5.2.3
+        $cookieDomain = ltrim($this->getDomain(), '.');
+
+        // Domain not set or exact match.
+        if (!$cookieDomain || !strcasecmp($domain, $cookieDomain)) {
+            return true;
+        }
+
+        // Matching the subdomain according to RFC 6265.
+        // http://tools.ietf.org/html/rfc6265#section-5.1.3
+        if (filter_var($domain, FILTER_VALIDATE_IP)) {
+            return false;
+        }
+
+        return (bool) preg_match('/\.' . preg_quote($cookieDomain, '/') . '$/', $domain);
+    }
+
+    /**
+     * Check if the cookie is expired
+     *
+     * @return bool
+     */
+    public function isExpired()
+    {
+        return $this->getExpires() !== null && time() > $this->getExpires();
+    }
+
+    /**
+     * Check if the cookie is valid according to RFC 6265
+     *
+     * @return bool|string Returns true if valid or an error message if invalid
+     */
+    public function validate()
+    {
+        // Names must not be empty, but can be 0
+        $name = $this->getName();
+        if (empty($name) && !is_numeric($name)) {
+            return 'The cookie name must not be empty';
+        }
+
+        // Check if any of the invalid characters are present in the cookie name
+        if (preg_match(
+            '/[\x00-\x20\x22\x28-\x29\x2c\x2f\x3a-\x40\x5c\x7b\x7d\x7f]/',
+            $name
+        )) {
+            return 'Cookie name must not contain invalid characters: ASCII '
+                . 'Control characters (0-31;127), space, tab and the '
+                . 'following characters: ()<>@,;:\"/?={}';
+        }
+
+        // Value must not be empty, but can be 0
+        $value = $this->getValue();
+        if (empty($value) && !is_numeric($value)) {
+            return 'The cookie value must not be empty';
+        }
+
+        // Domains must not be empty, but can be 0
+        // A "0" is not a valid internet domain, but may be used as server name
+        // in a private network.
+        $domain = $this->getDomain();
+        if (empty($domain) && !is_numeric($domain)) {
+            return 'The cookie domain must not be empty';
+        }
+
+        return true;
+    }
+}

vendor/guzzlehttp/guzzle/src/Exception/BadResponseException.php

@@ -0,0 +1,27 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Exception when an HTTP error occurs (4xx or 5xx error)
+ */
+class BadResponseException extends RequestException
+{
+    public function __construct(
+        $message,
+        RequestInterface $request,
+        ResponseInterface $response = null,
+        \Exception $previous = null,
+        array $handlerContext = []
+    ) {
+        if (null === $response) {
+            @trigger_error(
+                'Instantiating the ' . __CLASS__ . ' class without a Response is deprecated since version 6.3 and will be removed in 7.0.',
+                E_USER_DEPRECATED
+            );
+        }
+        parent::__construct($message, $request, $response, $previous, $handlerContext);
+    }
+}

vendor/guzzlehttp/guzzle/src/Exception/ClientException.php

@@ -0,0 +1,7 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+/**
+ * Exception when a client error is encountered (4xx codes)
+ */
+class ClientException extends BadResponseException {}

vendor/guzzlehttp/guzzle/src/Exception/ConnectException.php

@@ -0,0 +1,37 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Exception thrown when a connection cannot be established.
+ *
+ * Note that no response is present for a ConnectException
+ */
+class ConnectException extends RequestException
+{
+    public function __construct(
+        $message,
+        RequestInterface $request,
+        \Exception $previous = null,
+        array $handlerContext = []
+    ) {
+        parent::__construct($message, $request, null, $previous, $handlerContext);
+    }
+
+    /**
+     * @return null
+     */
+    public function getResponse()
+    {
+        return null;
+    }
+
+    /**
+     * @return bool
+     */
+    public function hasResponse()
+    {
+        return false;
+    }
+}

vendor/guzzlehttp/guzzle/src/Exception/GuzzleException.php

@@ -0,0 +1,13 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+/**
+ * @method string getMessage()
+ * @method \Throwable|null getPrevious()
+ * @method mixed getCode()
+ * @method string getFile()
+ * @method int getLine()
+ * @method array getTrace()
+ * @method string getTraceAsString()
+ */
+interface GuzzleException {}

vendor/guzzlehttp/guzzle/src/Exception/RequestException.php

@@ -0,0 +1,217 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use GuzzleHttp\Promise\PromiseInterface;
+use Psr\Http\Message\UriInterface;
+
+/**
+ * HTTP Request exception
+ */
+class RequestException extends TransferException
+{
+    /** @var RequestInterface */
+    private $request;
+
+    /** @var ResponseInterface */
+    private $response;
+
+    /** @var array */
+    private $handlerContext;
+
+    public function __construct(
+        $message,
+        RequestInterface $request,
+        ResponseInterface $response = null,
+        \Exception $previous = null,
+        array $handlerContext = []
+    ) {
+        // Set the code of the exception if the response is set and not future.
+        $code = $response && !($response instanceof PromiseInterface)
+            ? $response->getStatusCode()
+            : 0;
+        parent::__construct($message, $code, $previous);
+        $this->request = $request;
+        $this->response = $response;
+        $this->handlerContext = $handlerContext;
+    }
+
+    /**
+     * Wrap non-RequestExceptions with a RequestException
+     *
+     * @param RequestInterface $request
+     * @param \Exception       $e
+     *
+     * @return RequestException
+     */
+    public static function wrapException(RequestInterface $request, \Exception $e)
+    {
+        return $e instanceof RequestException
+            ? $e
+            : new RequestException($e->getMessage(), $request, null, $e);
+    }
+
+    /**
+     * Factory method to create a new exception with a normalized error message
+     *
+     * @param RequestInterface  $request  Request
+     * @param ResponseInterface $response Response received
+     * @param \Exception        $previous Previous exception
+     * @param array             $ctx      Optional handler context.
+     *
+     * @return self
+     */
+    public static function create(
+        RequestInterface $request,
+        ResponseInterface $response = null,
+        \Exception $previous = null,
+        array $ctx = []
+    ) {
+        if (!$response) {
+            return new self(
+                'Error completing request',
+                $request,
+                null,
+                $previous,
+                $ctx
+            );
+        }
+
+        $level = (int) floor($response->getStatusCode() / 100);
+        if ($level === 4) {
+            $label = 'Client error';
+            $className = ClientException::class;
+        } elseif ($level === 5) {
+            $label = 'Server error';
+            $className = ServerException::class;
+        } else {
+            $label = 'Unsuccessful request';
+            $className = __CLASS__;
+        }
+
+        $uri = $request->getUri();
+        $uri = static::obfuscateUri($uri);
+
+        // Client Error: `GET /` resulted in a `404 Not Found` response:
+        // <html> ... (truncated)
+        $message = sprintf(
+            '%s: `%s %s` resulted in a `%s %s` response',
+            $label,
+            $request->getMethod(),
+            $uri,
+            $response->getStatusCode(),
+            $response->getReasonPhrase()
+        );
+
+        $summary = static::getResponseBodySummary($response);
+
+        if ($summary !== null) {
+            $message .= ":\n{$summary}\n";
+        }
+
+        return new $className($message, $request, $response, $previous, $ctx);
+    }
+
+    /**
+     * Get a short summary of the response
+     *
+     * Will return `null` if the response is not printable.
+     *
+     * @param ResponseInterface $response
+     *
+     * @return string|null
+     */
+    public static function getResponseBodySummary(ResponseInterface $response)
+    {
+        $body = $response->getBody();
+
+        if (!$body->isSeekable()) {
+            return null;
+        }
+
+        $size = $body->getSize();
+
+        if ($size === 0) {
+            return null;
+        }
+
+        $summary = $body->read(120);
+        $body->rewind();
+
+        if ($size > 120) {
+            $summary .= ' (truncated...)';
+        }
+
+        // Matches any printable character, including unicode characters:
+        // letters, marks, numbers, punctuation, spacing, and separators.
+        if (preg_match('/[^\pL\pM\pN\pP\pS\pZ\n\r\t]/', $summary)) {
+            return null;
+        }
+
+        return $summary;
+    }
+
+    /**
+     * Obfuscates URI if there is an username and a password present
+     *
+     * @param UriInterface $uri
+     *
+     * @return UriInterface
+     */
+    private static function obfuscateUri($uri)
+    {
+        $userInfo = $uri->getUserInfo();
+
+        if (false !== ($pos = strpos($userInfo, ':'))) {
+            return $uri->withUserInfo(substr($userInfo, 0, $pos), '***');
+        }
+
+        return $uri;
+    }
+
+    /**
+     * Get the request that caused the exception
+     *
+     * @return RequestInterface
+     */
+    public function getRequest()
+    {
+        return $this->request;
+    }
+
+    /**
+     * Get the associated response
+     *
+     * @return ResponseInterface|null
+     */
+    public function getResponse()
+    {
+        return $this->response;
+    }
+
+    /**
+     * Check if a response was received
+     *
+     * @return bool
+     */
+    public function hasResponse()
+    {
+        return $this->response !== null;
+    }
+
+    /**
+     * Get contextual information about the error from the underlying handler.
+     *
+     * The contents of this array will vary depending on which handler you are
+     * using. It may also be just an empty array. Relying on this data will
+     * couple you to a specific handler, but can give more debug information
+     * when needed.
+     *
+     * @return array
+     */
+    public function getHandlerContext()
+    {
+        return $this->handlerContext;
+    }
+}

vendor/guzzlehttp/guzzle/src/Exception/SeekException.php

@@ -0,0 +1,27 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Exception thrown when a seek fails on a stream.
+ */
+class SeekException extends \RuntimeException implements GuzzleException
+{
+    private $stream;
+
+    public function __construct(StreamInterface $stream, $pos = 0, $msg = '')
+    {
+        $this->stream = $stream;
+        $msg = $msg ?: 'Could not seek the stream to position ' . $pos;
+        parent::__construct($msg);
+    }
+
+    /**
+     * @return StreamInterface
+     */
+    public function getStream()
+    {
+        return $this->stream;
+    }
+}

vendor/guzzlehttp/guzzle/src/Exception/ServerException.php

@@ -0,0 +1,7 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+/**
+ * Exception when a server error is encountered (5xx codes)
+ */
+class ServerException extends BadResponseException {}

vendor/guzzlehttp/guzzle/src/Exception/TooManyRedirectsException.php

@@ -0,0 +1,4 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+class TooManyRedirectsException extends RequestException {}

vendor/guzzlehttp/guzzle/src/Exception/TransferException.php

@@ -0,0 +1,4 @@
+<?php
+namespace GuzzleHttp\Exception;
+
+class TransferException extends \RuntimeException implements GuzzleException {}

vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php

@@ -0,0 +1,565 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\Exception\ConnectException;
+use GuzzleHttp\Promise\FulfilledPromise;
+use GuzzleHttp\Psr7;
+use GuzzleHttp\Psr7\LazyOpenStream;
+use GuzzleHttp\TransferStats;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Creates curl resources from a request
+ */
+class CurlFactory implements CurlFactoryInterface
+{
+    /** @var array */
+    private $handles = [];
+
+    /** @var int Total number of idle handles to keep in cache */
+    private $maxHandles;
+
+    /**
+     * @param int $maxHandles Maximum number of idle handles.
+     */
+    public function __construct($maxHandles)
+    {
+        $this->maxHandles = $maxHandles;
+    }
+
+    public function create(RequestInterface $request, array $options)
+    {
+        if (isset($options['curl']['body_as_string'])) {
+            $options['_body_as_string'] = $options['curl']['body_as_string'];
+            unset($options['curl']['body_as_string']);
+        }
+
+        $easy = new EasyHandle;
+        $easy->request = $request;
+        $easy->options = $options;
+        $conf = $this->getDefaultConf($easy);
+        $this->applyMethod($easy, $conf);
+        $this->applyHandlerOptions($easy, $conf);
+        $this->applyHeaders($easy, $conf);
+        unset($conf['_headers']);
+
+        // Add handler options from the request configuration options
+        if (isset($options['curl'])) {
+            $conf = array_replace($conf, $options['curl']);
+        }
+
+        $conf[CURLOPT_HEADERFUNCTION] = $this->createHeaderFn($easy);
+        $easy->handle = $this->handles
+            ? array_pop($this->handles)
+            : curl_init();
+        curl_setopt_array($easy->handle, $conf);
+
+        return $easy;
+    }
+
+    public function release(EasyHandle $easy)
+    {
+        $resource = $easy->handle;
+        unset($easy->handle);
+
+        if (count($this->handles) >= $this->maxHandles) {
+            curl_close($resource);
+        } else {
+            // Remove all callback functions as they can hold onto references
+            // and are not cleaned up by curl_reset. Using curl_setopt_array
+            // does not work for some reason, so removing each one
+            // individually.
+            curl_setopt($resource, CURLOPT_HEADERFUNCTION, null);
+            curl_setopt($resource, CURLOPT_READFUNCTION, null);
+            curl_setopt($resource, CURLOPT_WRITEFUNCTION, null);
+            curl_setopt($resource, CURLOPT_PROGRESSFUNCTION, null);
+            curl_reset($resource);
+            $this->handles[] = $resource;
+        }
+    }
+
+    /**
+     * Completes a cURL transaction, either returning a response promise or a
+     * rejected promise.
+     *
+     * @param callable             $handler
+     * @param EasyHandle           $easy
+     * @param CurlFactoryInterface $factory Dictates how the handle is released
+     *
+     * @return \GuzzleHttp\Promise\PromiseInterface
+     */
+    public static function finish(
+        callable $handler,
+        EasyHandle $easy,
+        CurlFactoryInterface $factory
+    ) {
+        if (isset($easy->options['on_stats'])) {
+            self::invokeStats($easy);
+        }
+
+        if (!$easy->response || $easy->errno) {
+            return self::finishError($handler, $easy, $factory);
+        }
+
+        // Return the response if it is present and there is no error.
+        $factory->release($easy);
+
+        // Rewind the body of the response if possible.
+        $body = $easy->response->getBody();
+        if ($body->isSeekable()) {
+            $body->rewind();
+        }
+
+        return new FulfilledPromise($easy->response);
+    }
+
+    private static function invokeStats(EasyHandle $easy)
+    {
+        $curlStats = curl_getinfo($easy->handle);
+        $stats = new TransferStats(
+            $easy->request,
+            $easy->response,
+            $curlStats['total_time'],
+            $easy->errno,
+            $curlStats
+        );
+        call_user_func($easy->options['on_stats'], $stats);
+    }
+
+    private static function finishError(
+        callable $handler,
+        EasyHandle $easy,
+        CurlFactoryInterface $factory
+    ) {
+        // Get error information and release the handle to the factory.
+        $ctx = [
+            'errno' => $easy->errno,
+            'error' => curl_error($easy->handle),
+        ] + curl_getinfo($easy->handle);
+        $factory->release($easy);
+
+        // Retry when nothing is present or when curl failed to rewind.
+        if (empty($easy->options['_err_message'])
+            && (!$easy->errno || $easy->errno == 65)
+        ) {
+            return self::retryFailedRewind($handler, $easy, $ctx);
+        }
+
+        return self::createRejection($easy, $ctx);
+    }
+
+    private static function createRejection(EasyHandle $easy, array $ctx)
+    {
+        static $connectionErrors = [
+            CURLE_OPERATION_TIMEOUTED  => true,
+            CURLE_COULDNT_RESOLVE_HOST => true,
+            CURLE_COULDNT_CONNECT      => true,
+            CURLE_SSL_CONNECT_ERROR    => true,
+            CURLE_GOT_NOTHING          => true,
+        ];
+
+        // If an exception was encountered during the onHeaders event, then
+        // return a rejected promise that wraps that exception.
+        if ($easy->onHeadersException) {
+            return \GuzzleHttp\Promise\rejection_for(
+                new RequestException(
+                    'An error was encountered during the on_headers event',
+                    $easy->request,
+                    $easy->response,
+                    $easy->onHeadersException,
+                    $ctx
+                )
+            );
+        }
+
+        $message = sprintf(
+            'cURL error %s: %s (%s)',
+            $ctx['errno'],
+            $ctx['error'],
+            'see http://curl.haxx.se/libcurl/c/libcurl-errors.html'
+        );
+
+        // Create a connection exception if it was a specific error code.
+        $error = isset($connectionErrors[$easy->errno])
+            ? new ConnectException($message, $easy->request, null, $ctx)
+            : new RequestException($message, $easy->request, $easy->response, null, $ctx);
+
+        return \GuzzleHttp\Promise\rejection_for($error);
+    }
+
+    private function getDefaultConf(EasyHandle $easy)
+    {
+        $conf = [
+            '_headers'             => $easy->request->getHeaders(),
+            CURLOPT_CUSTOMREQUEST  => $easy->request->getMethod(),
+            CURLOPT_URL            => (string) $easy->request->getUri()->withFragment(''),
+            CURLOPT_RETURNTRANSFER => false,
+            CURLOPT_HEADER         => false,
+            CURLOPT_CONNECTTIMEOUT => 150,
+        ];
+
+        if (defined('CURLOPT_PROTOCOLS')) {
+            $conf[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        $version = $easy->request->getProtocolVersion();
+        if ($version == 1.1) {
+            $conf[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_1;
+        } elseif ($version == 2.0) {
+            $conf[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_2_0;
+        } else {
+            $conf[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
+        }
+
+        return $conf;
+    }
+
+    private function applyMethod(EasyHandle $easy, array &$conf)
+    {
+        $body = $easy->request->getBody();
+        $size = $body->getSize();
+
+        if ($size === null || $size > 0) {
+            $this->applyBody($easy->request, $easy->options, $conf);
+            return;
+        }
+
+        $method = $easy->request->getMethod();
+        if ($method === 'PUT' || $method === 'POST') {
+            // See http://tools.ietf.org/html/rfc7230#section-3.3.2
+            if (!$easy->request->hasHeader('Content-Length')) {
+                $conf[CURLOPT_HTTPHEADER][] = 'Content-Length: 0';
+            }
+        } elseif ($method === 'HEAD') {
+            $conf[CURLOPT_NOBODY] = true;
+            unset(
+                $conf[CURLOPT_WRITEFUNCTION],
+                $conf[CURLOPT_READFUNCTION],
+                $conf[CURLOPT_FILE],
+                $conf[CURLOPT_INFILE]
+            );
+        }
+    }
+
+    private function applyBody(RequestInterface $request, array $options, array &$conf)
+    {
+        $size = $request->hasHeader('Content-Length')
+            ? (int) $request->getHeaderLine('Content-Length')
+            : null;
+
+        // Send the body as a string if the size is less than 1MB OR if the
+        // [curl][body_as_string] request value is set.
+        if (($size !== null && $size < 1000000) ||
+            !empty($options['_body_as_string'])
+        ) {
+            $conf[CURLOPT_POSTFIELDS] = (string) $request->getBody();
+            // Don't duplicate the Content-Length header
+            $this->removeHeader('Content-Length', $conf);
+            $this->removeHeader('Transfer-Encoding', $conf);
+        } else {
+            $conf[CURLOPT_UPLOAD] = true;
+            if ($size !== null) {
+                $conf[CURLOPT_INFILESIZE] = $size;
+                $this->removeHeader('Content-Length', $conf);
+            }
+            $body = $request->getBody();
+            if ($body->isSeekable()) {
+                $body->rewind();
+            }
+            $conf[CURLOPT_READFUNCTION] = function ($ch, $fd, $length) use ($body) {
+                return $body->read($length);
+            };
+        }
+
+        // If the Expect header is not present, prevent curl from adding it
+        if (!$request->hasHeader('Expect')) {
+            $conf[CURLOPT_HTTPHEADER][] = 'Expect:';
+        }
+
+        // cURL sometimes adds a content-type by default. Prevent this.
+        if (!$request->hasHeader('Content-Type')) {
+            $conf[CURLOPT_HTTPHEADER][] = 'Content-Type:';
+        }
+    }
+
+    private function applyHeaders(EasyHandle $easy, array &$conf)
+    {
+        foreach ($conf['_headers'] as $name => $values) {
+            foreach ($values as $value) {
+                $value = (string) $value;
+                if ($value === '') {
+                    // cURL requires a special format for empty headers.
+                    // See https://github.com/guzzle/guzzle/issues/1882 for more details.
+                    $conf[CURLOPT_HTTPHEADER][] = "$name;";
+                } else {
+                    $conf[CURLOPT_HTTPHEADER][] = "$name: $value";
+                }
+            }
+        }
+
+        // Remove the Accept header if one was not set
+        if (!$easy->request->hasHeader('Accept')) {
+            $conf[CURLOPT_HTTPHEADER][] = 'Accept:';
+        }
+    }
+
+    /**
+     * Remove a header from the options array.
+     *
+     * @param string $name    Case-insensitive header to remove
+     * @param array  $options Array of options to modify
+     */
+    private function removeHeader($name, array &$options)
+    {
+        foreach (array_keys($options['_headers']) as $key) {
+            if (!strcasecmp($key, $name)) {
+                unset($options['_headers'][$key]);
+                return;
+            }
+        }
+    }
+
+    private function applyHandlerOptions(EasyHandle $easy, array &$conf)
+    {
+        $options = $easy->options;
+        if (isset($options['verify'])) {
+            if ($options['verify'] === false) {
+                unset($conf[CURLOPT_CAINFO]);
+                $conf[CURLOPT_SSL_VERIFYHOST] = 0;
+                $conf[CURLOPT_SSL_VERIFYPEER] = false;
+            } else {
+                $conf[CURLOPT_SSL_VERIFYHOST] = 2;
+                $conf[CURLOPT_SSL_VERIFYPEER] = true;
+                if (is_string($options['verify'])) {
+                    // Throw an error if the file/folder/link path is not valid or doesn't exist.
+                    if (!file_exists($options['verify'])) {
+                        throw new \InvalidArgumentException(
+                            "SSL CA bundle not found: {$options['verify']}"
+                        );
+                    }
+                    // If it's a directory or a link to a directory use CURLOPT_CAPATH.
+                    // If not, it's probably a file, or a link to a file, so use CURLOPT_CAINFO.
+                    if (is_dir($options['verify']) ||
+                        (is_link($options['verify']) && is_dir(readlink($options['verify'])))) {
+                        $conf[CURLOPT_CAPATH] = $options['verify'];
+                    } else {
+                        $conf[CURLOPT_CAINFO] = $options['verify'];
+                    }
+                }
+            }
+        }
+
+        if (!empty($options['decode_content'])) {
+            $accept = $easy->request->getHeaderLine('Accept-Encoding');
+            if ($accept) {
+                $conf[CURLOPT_ENCODING] = $accept;
+            } else {
+                $conf[CURLOPT_ENCODING] = '';
+                // Don't let curl send the header over the wire
+                $conf[CURLOPT_HTTPHEADER][] = 'Accept-Encoding:';
+            }
+        }
+
+        if (isset($options['sink'])) {
+            $sink = $options['sink'];
+            if (!is_string($sink)) {
+                $sink = \GuzzleHttp\Psr7\stream_for($sink);
+            } elseif (!is_dir(dirname($sink))) {
+                // Ensure that the directory exists before failing in curl.
+                throw new \RuntimeException(sprintf(
+                    'Directory %s does not exist for sink value of %s',
+                    dirname($sink),
+                    $sink
+                ));
+            } else {
+                $sink = new LazyOpenStream($sink, 'w+');
+            }
+            $easy->sink = $sink;
+            $conf[CURLOPT_WRITEFUNCTION] = function ($ch, $write) use ($sink) {
+                return $sink->write($write);
+            };
+        } else {
+            // Use a default temp stream if no sink was set.
+            $conf[CURLOPT_FILE] = fopen('php://temp', 'w+');
+            $easy->sink = Psr7\stream_for($conf[CURLOPT_FILE]);
+        }
+        $timeoutRequiresNoSignal = false;
+        if (isset($options['timeout'])) {
+            $timeoutRequiresNoSignal |= $options['timeout'] < 1;
+            $conf[CURLOPT_TIMEOUT_MS] = $options['timeout'] * 1000;
+        }
+
+        // CURL default value is CURL_IPRESOLVE_WHATEVER
+        if (isset($options['force_ip_resolve'])) {
+            if ('v4' === $options['force_ip_resolve']) {
+                $conf[CURLOPT_IPRESOLVE] = CURL_IPRESOLVE_V4;
+            } elseif ('v6' === $options['force_ip_resolve']) {
+                $conf[CURLOPT_IPRESOLVE] = CURL_IPRESOLVE_V6;
+            }
+        }
+
+        if (isset($options['connect_timeout'])) {
+            $timeoutRequiresNoSignal |= $options['connect_timeout'] < 1;
+            $conf[CURLOPT_CONNECTTIMEOUT_MS] = $options['connect_timeout'] * 1000;
+        }
+
+        if ($timeoutRequiresNoSignal && strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
+            $conf[CURLOPT_NOSIGNAL] = true;
+        }
+
+        if (isset($options['proxy'])) {
+            if (!is_array($options['proxy'])) {
+                $conf[CURLOPT_PROXY] = $options['proxy'];
+            } else {
+                $scheme = $easy->request->getUri()->getScheme();
+                if (isset($options['proxy'][$scheme])) {
+                    $host = $easy->request->getUri()->getHost();
+                    if (!isset($options['proxy']['no']) ||
+                        !\GuzzleHttp\is_host_in_noproxy($host, $options['proxy']['no'])
+                    ) {
+                        $conf[CURLOPT_PROXY] = $options['proxy'][$scheme];
+                    }
+                }
+            }
+        }
+
+        if (isset($options['cert'])) {
+            $cert = $options['cert'];
+            if (is_array($cert)) {
+                $conf[CURLOPT_SSLCERTPASSWD] = $cert[1];
+                $cert = $cert[0];
+            }
+            if (!file_exists($cert)) {
+                throw new \InvalidArgumentException(
+                    "SSL certificate not found: {$cert}"
+                );
+            }
+            $conf[CURLOPT_SSLCERT] = $cert;
+        }
+
+        if (isset($options['ssl_key'])) {
+            $sslKey = $options['ssl_key'];
+            if (is_array($sslKey)) {
+                $conf[CURLOPT_SSLKEYPASSWD] = $sslKey[1];
+                $sslKey = $sslKey[0];
+            }
+            if (!file_exists($sslKey)) {
+                throw new \InvalidArgumentException(
+                    "SSL private key not found: {$sslKey}"
+                );
+            }
+            $conf[CURLOPT_SSLKEY] = $sslKey;
+        }
+
+        if (isset($options['progress'])) {
+            $progress = $options['progress'];
+            if (!is_callable($progress)) {
+                throw new \InvalidArgumentException(
+                    'progress client option must be callable'
+                );
+            }
+            $conf[CURLOPT_NOPROGRESS] = false;
+            $conf[CURLOPT_PROGRESSFUNCTION] = function () use ($progress) {
+                $args = func_get_args();
+                // PHP 5.5 pushed the handle onto the start of the args
+                if (is_resource($args[0])) {
+                    array_shift($args);
+                }
+                call_user_func_array($progress, $args);
+            };
+        }
+
+        if (!empty($options['debug'])) {
+            $conf[CURLOPT_STDERR] = \GuzzleHttp\debug_resource($options['debug']);
+            $conf[CURLOPT_VERBOSE] = true;
+        }
+    }
+
+    /**
+     * This function ensures that a response was set on a transaction. If one
+     * was not set, then the request is retried if possible. This error
+     * typically means you are sending a payload, curl encountered a
+     * "Connection died, retrying a fresh connect" error, tried to rewind the
+     * stream, and then encountered a "necessary data rewind wasn't possible"
+     * error, causing the request to be sent through curl_multi_info_read()
+     * without an error status.
+     */
+    private static function retryFailedRewind(
+        callable $handler,
+        EasyHandle $easy,
+        array $ctx
+    ) {
+        try {
+            // Only rewind if the body has been read from.
+            $body = $easy->request->getBody();
+            if ($body->tell() > 0) {
+                $body->rewind();
+            }
+        } catch (\RuntimeException $e) {
+            $ctx['error'] = 'The connection unexpectedly failed without '
+                . 'providing an error. The request would have been retried, '
+                . 'but attempting to rewind the request body failed. '
+                . 'Exception: ' . $e;
+            return self::createRejection($easy, $ctx);
+        }
+
+        // Retry no more than 3 times before giving up.
+        if (!isset($easy->options['_curl_retries'])) {
+            $easy->options['_curl_retries'] = 1;
+        } elseif ($easy->options['_curl_retries'] == 2) {
+            $ctx['error'] = 'The cURL request was retried 3 times '
+                . 'and did not succeed. The most likely reason for the failure '
+                . 'is that cURL was unable to rewind the body of the request '
+                . 'and subsequent retries resulted in the same error. Turn on '
+                . 'the debug option to see what went wrong. See '
+                . 'https://bugs.php.net/bug.php?id=47204 for more information.';
+            return self::createRejection($easy, $ctx);
+        } else {
+            $easy->options['_curl_retries']++;
+        }
+
+        return $handler($easy->request, $easy->options);
+    }
+
+    private function createHeaderFn(EasyHandle $easy)
+    {
+        if (isset($easy->options['on_headers'])) {
+            $onHeaders = $easy->options['on_headers'];
+
+            if (!is_callable($onHeaders)) {
+                throw new \InvalidArgumentException('on_headers must be callable');
+            }
+        } else {
+            $onHeaders = null;
+        }
+
+        return function ($ch, $h) use (
+            $onHeaders,
+            $easy,
+            &$startingResponse
+        ) {
+            $value = trim($h);
+            if ($value === '') {
+                $startingResponse = true;
+                $easy->createResponse();
+                if ($onHeaders !== null) {
+                    try {
+                        $onHeaders($easy->response);
+                    } catch (\Exception $e) {
+                        // Associate the exception with the handle and trigger
+                        // a curl header write error by returning 0.
+                        $easy->onHeadersException = $e;
+                        return -1;
+                    }
+                }
+            } elseif ($startingResponse) {
+                $startingResponse = false;
+                $easy->headers = [$value];
+            } else {
+                $easy->headers[] = $value;
+            }
+            return strlen($h);
+        };
+    }
+}

vendor/guzzlehttp/guzzle/src/Handler/CurlFactoryInterface.php

@@ -0,0 +1,27 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use Psr\Http\Message\RequestInterface;
+
+interface CurlFactoryInterface
+{
+    /**
+     * Creates a cURL handle resource.
+     *
+     * @param RequestInterface $request Request
+     * @param array            $options Transfer options
+     *
+     * @return EasyHandle
+     * @throws \RuntimeException when an option cannot be applied
+     */
+    public function create(RequestInterface $request, array $options);
+
+    /**
+     * Release an easy handle, allowing it to be reused or closed.
+     *
+     * This function must call unset on the easy handle's "handle" property.
+     *
+     * @param EasyHandle $easy
+     */
+    public function release(EasyHandle $easy);
+}

vendor/guzzlehttp/guzzle/src/Handler/CurlHandler.php

@@ -0,0 +1,45 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * HTTP handler that uses cURL easy handles as a transport layer.
+ *
+ * When using the CurlHandler, custom curl options can be specified as an
+ * associative array of curl option constants mapping to values in the
+ * **curl** key of the "client" key of the request.
+ */
+class CurlHandler
+{
+    /** @var CurlFactoryInterface */
+    private $factory;
+
+    /**
+     * Accepts an associative array of options:
+     *
+     * - factory: Optional curl factory used to create cURL handles.
+     *
+     * @param array $options Array of options to use with the handler
+     */
+    public function __construct(array $options = [])
+    {
+        $this->factory = isset($options['handle_factory'])
+            ? $options['handle_factory']
+            : new CurlFactory(3);
+    }
+
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        if (isset($options['delay'])) {
+            usleep($options['delay'] * 1000);
+        }
+
+        $easy = $this->factory->create($request, $options);
+        curl_exec($easy->handle);
+        $easy->errno = curl_errno($easy->handle);
+
+        return CurlFactory::finish($this, $easy, $this->factory);
+    }
+}

vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php

@@ -0,0 +1,199 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\Promise as P;
+use GuzzleHttp\Promise\Promise;
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Returns an asynchronous response using curl_multi_* functions.
+ *
+ * When using the CurlMultiHandler, custom curl options can be specified as an
+ * associative array of curl option constants mapping to values in the
+ * **curl** key of the provided request options.
+ *
+ * @property resource $_mh Internal use only. Lazy loaded multi-handle.
+ */
+class CurlMultiHandler
+{
+    /** @var CurlFactoryInterface */
+    private $factory;
+    private $selectTimeout;
+    private $active;
+    private $handles = [];
+    private $delays = [];
+
+    /**
+     * This handler accepts the following options:
+     *
+     * - handle_factory: An optional factory  used to create curl handles
+     * - select_timeout: Optional timeout (in seconds) to block before timing
+     *   out while selecting curl handles. Defaults to 1 second.
+     *
+     * @param array $options
+     */
+    public function __construct(array $options = [])
+    {
+        $this->factory = isset($options['handle_factory'])
+            ? $options['handle_factory'] : new CurlFactory(50);
+        $this->selectTimeout = isset($options['select_timeout'])
+            ? $options['select_timeout'] : 1;
+    }
+
+    public function __get($name)
+    {
+        if ($name === '_mh') {
+            return $this->_mh = curl_multi_init();
+        }
+
+        throw new \BadMethodCallException();
+    }
+
+    public function __destruct()
+    {
+        if (isset($this->_mh)) {
+            curl_multi_close($this->_mh);
+            unset($this->_mh);
+        }
+    }
+
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        $easy = $this->factory->create($request, $options);
+        $id = (int) $easy->handle;
+
+        $promise = new Promise(
+            [$this, 'execute'],
+            function () use ($id) {
+                return $this->cancel($id);
+            }
+        );
+
+        $this->addRequest(['easy' => $easy, 'deferred' => $promise]);
+
+        return $promise;
+    }
+
+    /**
+     * Ticks the curl event loop.
+     */
+    public function tick()
+    {
+        // Add any delayed handles if needed.
+        if ($this->delays) {
+            $currentTime = microtime(true);
+            foreach ($this->delays as $id => $delay) {
+                if ($currentTime >= $delay) {
+                    unset($this->delays[$id]);
+                    curl_multi_add_handle(
+                        $this->_mh,
+                        $this->handles[$id]['easy']->handle
+                    );
+                }
+            }
+        }
+
+        // Step through the task queue which may add additional requests.
+        P\queue()->run();
+
+        if ($this->active &&
+            curl_multi_select($this->_mh, $this->selectTimeout) === -1
+        ) {
+            // Perform a usleep if a select returns -1.
+            // See: https://bugs.php.net/bug.php?id=61141
+            usleep(250);
+        }
+
+        while (curl_multi_exec($this->_mh, $this->active) === CURLM_CALL_MULTI_PERFORM);
+
+        $this->processMessages();
+    }
+
+    /**
+     * Runs until all outstanding connections have completed.
+     */
+    public function execute()
+    {
+        $queue = P\queue();
+
+        while ($this->handles || !$queue->isEmpty()) {
+            // If there are no transfers, then sleep for the next delay
+            if (!$this->active && $this->delays) {
+                usleep($this->timeToNext());
+            }
+            $this->tick();
+        }
+    }
+
+    private function addRequest(array $entry)
+    {
+        $easy = $entry['easy'];
+        $id = (int) $easy->handle;
+        $this->handles[$id] = $entry;
+        if (empty($easy->options['delay'])) {
+            curl_multi_add_handle($this->_mh, $easy->handle);
+        } else {
+            $this->delays[$id] = microtime(true) + ($easy->options['delay'] / 1000);
+        }
+    }
+
+    /**
+     * Cancels a handle from sending and removes references to it.
+     *
+     * @param int $id Handle ID to cancel and remove.
+     *
+     * @return bool True on success, false on failure.
+     */
+    private function cancel($id)
+    {
+        // Cannot cancel if it has been processed.
+        if (!isset($this->handles[$id])) {
+            return false;
+        }
+
+        $handle = $this->handles[$id]['easy']->handle;
+        unset($this->delays[$id], $this->handles[$id]);
+        curl_multi_remove_handle($this->_mh, $handle);
+        curl_close($handle);
+
+        return true;
+    }
+
+    private function processMessages()
+    {
+        while ($done = curl_multi_info_read($this->_mh)) {
+            $id = (int) $done['handle'];
+            curl_multi_remove_handle($this->_mh, $done['handle']);
+
+            if (!isset($this->handles[$id])) {
+                // Probably was cancelled.
+                continue;
+            }
+
+            $entry = $this->handles[$id];
+            unset($this->handles[$id], $this->delays[$id]);
+            $entry['easy']->errno = $done['result'];
+            $entry['deferred']->resolve(
+                CurlFactory::finish(
+                    $this,
+                    $entry['easy'],
+                    $this->factory
+                )
+            );
+        }
+    }
+
+    private function timeToNext()
+    {
+        $currentTime = microtime(true);
+        $nextTime = PHP_INT_MAX;
+        foreach ($this->delays as $time) {
+            if ($time < $nextTime) {
+                $nextTime = $time;
+            }
+        }
+
+        return max(0, $nextTime - $currentTime) * 1000000;
+    }
+}

vendor/guzzlehttp/guzzle/src/Handler/EasyHandle.php

@@ -0,0 +1,92 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\Psr7\Response;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Represents a cURL easy handle and the data it populates.
+ *
+ * @internal
+ */
+final class EasyHandle
+{
+    /** @var resource cURL resource */
+    public $handle;
+
+    /** @var StreamInterface Where data is being written */
+    public $sink;
+
+    /** @var array Received HTTP headers so far */
+    public $headers = [];
+
+    /** @var ResponseInterface Received response (if any) */
+    public $response;
+
+    /** @var RequestInterface Request being sent */
+    public $request;
+
+    /** @var array Request options */
+    public $options = [];
+
+    /** @var int cURL error number (if any) */
+    public $errno = 0;
+
+    /** @var \Exception Exception during on_headers (if any) */
+    public $onHeadersException;
+
+    /**
+     * Attach a response to the easy handle based on the received headers.
+     *
+     * @throws \RuntimeException if no headers have been received.
+     */
+    public function createResponse()
+    {
+        if (empty($this->headers)) {
+            throw new \RuntimeException('No headers have been received');
+        }
+
+        // HTTP-version SP status-code SP reason-phrase
+        $startLine = explode(' ', array_shift($this->headers), 3);
+        $headers = \GuzzleHttp\headers_from_lines($this->headers);
+        $normalizedKeys = \GuzzleHttp\normalize_header_keys($headers);
+
+        if (!empty($this->options['decode_content'])
+            && isset($normalizedKeys['content-encoding'])
+        ) {
+            $headers['x-encoded-content-encoding']
+                = $headers[$normalizedKeys['content-encoding']];
+            unset($headers[$normalizedKeys['content-encoding']]);
+            if (isset($normalizedKeys['content-length'])) {
+                $headers['x-encoded-content-length']
+                    = $headers[$normalizedKeys['content-length']];
+
+                $bodyLength = (int) $this->sink->getSize();
+                if ($bodyLength) {
+                    $headers[$normalizedKeys['content-length']] = $bodyLength;
+                } else {
+                    unset($headers[$normalizedKeys['content-length']]);
+                }
+            }
+        }
+
+        // Attach a response to the easy handle with the parsed headers.
+        $this->response = new Response(
+            $startLine[1],
+            $headers,
+            $this->sink,
+            substr($startLine[0], 5),
+            isset($startLine[2]) ? (string) $startLine[2] : null
+        );
+    }
+
+    public function __get($name)
+    {
+        $msg = $name === 'handle'
+            ? 'The EasyHandle has been released'
+            : 'Invalid property: ' . $name;
+        throw new \BadMethodCallException($msg);
+    }
+}

vendor/guzzlehttp/guzzle/src/Handler/MockHandler.php

@@ -0,0 +1,189 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Promise\RejectedPromise;
+use GuzzleHttp\TransferStats;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Handler that returns responses or throw exceptions from a queue.
+ */
+class MockHandler implements \Countable
+{
+    private $queue = [];
+    private $lastRequest;
+    private $lastOptions;
+    private $onFulfilled;
+    private $onRejected;
+
+    /**
+     * Creates a new MockHandler that uses the default handler stack list of
+     * middlewares.
+     *
+     * @param array $queue Array of responses, callables, or exceptions.
+     * @param callable $onFulfilled Callback to invoke when the return value is fulfilled.
+     * @param callable $onRejected  Callback to invoke when the return value is rejected.
+     *
+     * @return HandlerStack
+     */
+    public static function createWithMiddleware(
+        array $queue = null,
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    ) {
+        return HandlerStack::create(new self($queue, $onFulfilled, $onRejected));
+    }
+
+    /**
+     * The passed in value must be an array of
+     * {@see Psr7\Http\Message\ResponseInterface} objects, Exceptions,
+     * callables, or Promises.
+     *
+     * @param array $queue
+     * @param callable $onFulfilled Callback to invoke when the return value is fulfilled.
+     * @param callable $onRejected  Callback to invoke when the return value is rejected.
+     */
+    public function __construct(
+        array $queue = null,
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    ) {
+        $this->onFulfilled = $onFulfilled;
+        $this->onRejected = $onRejected;
+
+        if ($queue) {
+            call_user_func_array([$this, 'append'], $queue);
+        }
+    }
+
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        if (!$this->queue) {
+            throw new \OutOfBoundsException('Mock queue is empty');
+        }
+
+        if (isset($options['delay'])) {
+            usleep($options['delay'] * 1000);
+        }
+
+        $this->lastRequest = $request;
+        $this->lastOptions = $options;
+        $response = array_shift($this->queue);
+
+        if (isset($options['on_headers'])) {
+            if (!is_callable($options['on_headers'])) {
+                throw new \InvalidArgumentException('on_headers must be callable');
+            }
+            try {
+                $options['on_headers']($response);
+            } catch (\Exception $e) {
+                $msg = 'An error was encountered during the on_headers event';
+                $response = new RequestException($msg, $request, $response, $e);
+            }
+        }
+
+        if (is_callable($response)) {
+            $response = call_user_func($response, $request, $options);
+        }
+
+        $response = $response instanceof \Exception
+            ? \GuzzleHttp\Promise\rejection_for($response)
+            : \GuzzleHttp\Promise\promise_for($response);
+
+        return $response->then(
+            function ($value) use ($request, $options) {
+                $this->invokeStats($request, $options, $value);
+                if ($this->onFulfilled) {
+                    call_user_func($this->onFulfilled, $value);
+                }
+                if (isset($options['sink'])) {
+                    $contents = (string) $value->getBody();
+                    $sink = $options['sink'];
+
+                    if (is_resource($sink)) {
+                        fwrite($sink, $contents);
+                    } elseif (is_string($sink)) {
+                        file_put_contents($sink, $contents);
+                    } elseif ($sink instanceof \Psr\Http\Message\StreamInterface) {
+                        $sink->write($contents);
+                    }
+                }
+
+                return $value;
+            },
+            function ($reason) use ($request, $options) {
+                $this->invokeStats($request, $options, null, $reason);
+                if ($this->onRejected) {
+                    call_user_func($this->onRejected, $reason);
+                }
+                return \GuzzleHttp\Promise\rejection_for($reason);
+            }
+        );
+    }
+
+    /**
+     * Adds one or more variadic requests, exceptions, callables, or promises
+     * to the queue.
+     */
+    public function append()
+    {
+        foreach (func_get_args() as $value) {
+            if ($value instanceof ResponseInterface
+                || $value instanceof \Exception
+                || $value instanceof PromiseInterface
+                || is_callable($value)
+            ) {
+                $this->queue[] = $value;
+            } else {
+                throw new \InvalidArgumentException('Expected a response or '
+                    . 'exception. Found ' . \GuzzleHttp\describe_type($value));
+            }
+        }
+    }
+
+    /**
+     * Get the last received request.
+     *
+     * @return RequestInterface
+     */
+    public function getLastRequest()
+    {
+        return $this->lastRequest;
+    }
+
+    /**
+     * Get the last received request options.
+     *
+     * @return array
+     */
+    public function getLastOptions()
+    {
+        return $this->lastOptions;
+    }
+
+    /**
+     * Returns the number of remaining items in the queue.
+     *
+     * @return int
+     */
+    public function count()
+    {
+        return count($this->queue);
+    }
+
+    private function invokeStats(
+        RequestInterface $request,
+        array $options,
+        ResponseInterface $response = null,
+        $reason = null
+    ) {
+        if (isset($options['on_stats'])) {
+            $stats = new TransferStats($request, $response, 0, $reason);
+            call_user_func($options['on_stats'], $stats);
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/Handler/Proxy.php

@@ -0,0 +1,55 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\RequestOptions;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Provides basic proxies for handlers.
+ */
+class Proxy
+{
+    /**
+     * Sends synchronous requests to a specific handler while sending all other
+     * requests to another handler.
+     *
+     * @param callable $default Handler used for normal responses
+     * @param callable $sync    Handler used for synchronous responses.
+     *
+     * @return callable Returns the composed handler.
+     */
+    public static function wrapSync(
+        callable $default,
+        callable $sync
+    ) {
+        return function (RequestInterface $request, array $options) use ($default, $sync) {
+            return empty($options[RequestOptions::SYNCHRONOUS])
+                ? $default($request, $options)
+                : $sync($request, $options);
+        };
+    }
+
+    /**
+     * Sends streaming requests to a streaming compatible handler while sending
+     * all other requests to a default handler.
+     *
+     * This, for example, could be useful for taking advantage of the
+     * performance benefits of curl while still supporting true streaming
+     * through the StreamHandler.
+     *
+     * @param callable $default   Handler used for non-streaming responses
+     * @param callable $streaming Handler used for streaming responses
+     *
+     * @return callable Returns the composed handler.
+     */
+    public static function wrapStreaming(
+        callable $default,
+        callable $streaming
+    ) {
+        return function (RequestInterface $request, array $options) use ($default, $streaming) {
+            return empty($options['stream'])
+                ? $default($request, $options)
+                : $streaming($request, $options);
+        };
+    }
+}

vendor/guzzlehttp/guzzle/src/Handler/StreamHandler.php

@@ -0,0 +1,532 @@
+<?php
+namespace GuzzleHttp\Handler;
+
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\Exception\ConnectException;
+use GuzzleHttp\Promise\FulfilledPromise;
+use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Psr7;
+use GuzzleHttp\TransferStats;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * HTTP handler that uses PHP's HTTP stream wrapper.
+ */
+class StreamHandler
+{
+    private $lastHeaders = [];
+
+    /**
+     * Sends an HTTP request.
+     *
+     * @param RequestInterface $request Request to send.
+     * @param array            $options Request transfer options.
+     *
+     * @return PromiseInterface
+     */
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        // Sleep if there is a delay specified.
+        if (isset($options['delay'])) {
+            usleep($options['delay'] * 1000);
+        }
+
+        $startTime = isset($options['on_stats']) ? microtime(true) : null;
+
+        try {
+            // Does not support the expect header.
+            $request = $request->withoutHeader('Expect');
+
+            // Append a content-length header if body size is zero to match
+            // cURL's behavior.
+            if (0 === $request->getBody()->getSize()) {
+                $request = $request->withHeader('Content-Length', 0);
+            }
+
+            return $this->createResponse(
+                $request,
+                $options,
+                $this->createStream($request, $options),
+                $startTime
+            );
+        } catch (\InvalidArgumentException $e) {
+            throw $e;
+        } catch (\Exception $e) {
+            // Determine if the error was a networking error.
+            $message = $e->getMessage();
+            // This list can probably get more comprehensive.
+            if (strpos($message, 'getaddrinfo') // DNS lookup failed
+                || strpos($message, 'Connection refused')
+                || strpos($message, "couldn't connect to host") // error on HHVM
+                || strpos($message, "connection attempt failed")
+            ) {
+                $e = new ConnectException($e->getMessage(), $request, $e);
+            }
+            $e = RequestException::wrapException($request, $e);
+            $this->invokeStats($options, $request, $startTime, null, $e);
+
+            return \GuzzleHttp\Promise\rejection_for($e);
+        }
+    }
+
+    private function invokeStats(
+        array $options,
+        RequestInterface $request,
+        $startTime,
+        ResponseInterface $response = null,
+        $error = null
+    ) {
+        if (isset($options['on_stats'])) {
+            $stats = new TransferStats(
+                $request,
+                $response,
+                microtime(true) - $startTime,
+                $error,
+                []
+            );
+            call_user_func($options['on_stats'], $stats);
+        }
+    }
+
+    private function createResponse(
+        RequestInterface $request,
+        array $options,
+        $stream,
+        $startTime
+    ) {
+        $hdrs = $this->lastHeaders;
+        $this->lastHeaders = [];
+        $parts = explode(' ', array_shift($hdrs), 3);
+        $ver = explode('/', $parts[0])[1];
+        $status = $parts[1];
+        $reason = isset($parts[2]) ? $parts[2] : null;
+        $headers = \GuzzleHttp\headers_from_lines($hdrs);
+        list($stream, $headers) = $this->checkDecode($options, $headers, $stream);
+        $stream = Psr7\stream_for($stream);
+        $sink = $stream;
+
+        if (strcasecmp('HEAD', $request->getMethod())) {
+            $sink = $this->createSink($stream, $options);
+        }
+
+        $response = new Psr7\Response($status, $headers, $sink, $ver, $reason);
+
+        if (isset($options['on_headers'])) {
+            try {
+                $options['on_headers']($response);
+            } catch (\Exception $e) {
+                $msg = 'An error was encountered during the on_headers event';
+                $ex = new RequestException($msg, $request, $response, $e);
+                return \GuzzleHttp\Promise\rejection_for($ex);
+            }
+        }
+
+        // Do not drain when the request is a HEAD request because they have
+        // no body.
+        if ($sink !== $stream) {
+            $this->drain(
+                $stream,
+                $sink,
+                $response->getHeaderLine('Content-Length')
+            );
+        }
+
+        $this->invokeStats($options, $request, $startTime, $response, null);
+
+        return new FulfilledPromise($response);
+    }
+
+    private function createSink(StreamInterface $stream, array $options)
+    {
+        if (!empty($options['stream'])) {
+            return $stream;
+        }
+
+        $sink = isset($options['sink'])
+            ? $options['sink']
+            : fopen('php://temp', 'r+');
+
+        return is_string($sink)
+            ? new Psr7\LazyOpenStream($sink, 'w+')
+            : Psr7\stream_for($sink);
+    }
+
+    private function checkDecode(array $options, array $headers, $stream)
+    {
+        // Automatically decode responses when instructed.
+        if (!empty($options['decode_content'])) {
+            $normalizedKeys = \GuzzleHttp\normalize_header_keys($headers);
+            if (isset($normalizedKeys['content-encoding'])) {
+                $encoding = $headers[$normalizedKeys['content-encoding']];
+                if ($encoding[0] === 'gzip' || $encoding[0] === 'deflate') {
+                    $stream = new Psr7\InflateStream(
+                        Psr7\stream_for($stream)
+                    );
+                    $headers['x-encoded-content-encoding']
+                        = $headers[$normalizedKeys['content-encoding']];
+                    // Remove content-encoding header
+                    unset($headers[$normalizedKeys['content-encoding']]);
+                    // Fix content-length header
+                    if (isset($normalizedKeys['content-length'])) {
+                        $headers['x-encoded-content-length']
+                            = $headers[$normalizedKeys['content-length']];
+
+                        $length = (int) $stream->getSize();
+                        if ($length === 0) {
+                            unset($headers[$normalizedKeys['content-length']]);
+                        } else {
+                            $headers[$normalizedKeys['content-length']] = [$length];
+                        }
+                    }
+                }
+            }
+        }
+
+        return [$stream, $headers];
+    }
+
+    /**
+     * Drains the source stream into the "sink" client option.
+     *
+     * @param StreamInterface $source
+     * @param StreamInterface $sink
+     * @param string          $contentLength Header specifying the amount of
+     *                                       data to read.
+     *
+     * @return StreamInterface
+     * @throws \RuntimeException when the sink option is invalid.
+     */
+    private function drain(
+        StreamInterface $source,
+        StreamInterface $sink,
+        $contentLength
+    ) {
+        // If a content-length header is provided, then stop reading once
+        // that number of bytes has been read. This can prevent infinitely
+        // reading from a stream when dealing with servers that do not honor
+        // Connection: Close headers.
+        Psr7\copy_to_stream(
+            $source,
+            $sink,
+            (strlen($contentLength) > 0 && (int) $contentLength > 0) ? (int) $contentLength : -1
+        );
+
+        $sink->seek(0);
+        $source->close();
+
+        return $sink;
+    }
+
+    /**
+     * Create a resource and check to ensure it was created successfully
+     *
+     * @param callable $callback Callable that returns stream resource
+     *
+     * @return resource
+     * @throws \RuntimeException on error
+     */
+    private function createResource(callable $callback)
+    {
+        $errors = null;
+        set_error_handler(function ($_, $msg, $file, $line) use (&$errors) {
+            $errors[] = [
+                'message' => $msg,
+                'file'    => $file,
+                'line'    => $line
+            ];
+            return true;
+        });
+
+        $resource = $callback();
+        restore_error_handler();
+
+        if (!$resource) {
+            $message = 'Error creating resource: ';
+            foreach ($errors as $err) {
+                foreach ($err as $key => $value) {
+                    $message .= "[$key] $value" . PHP_EOL;
+                }
+            }
+            throw new \RuntimeException(trim($message));
+        }
+
+        return $resource;
+    }
+
+    private function createStream(RequestInterface $request, array $options)
+    {
+        static $methods;
+        if (!$methods) {
+            $methods = array_flip(get_class_methods(__CLASS__));
+        }
+
+        // HTTP/1.1 streams using the PHP stream wrapper require a
+        // Connection: close header
+        if ($request->getProtocolVersion() == '1.1'
+            && !$request->hasHeader('Connection')
+        ) {
+            $request = $request->withHeader('Connection', 'close');
+        }
+
+        // Ensure SSL is verified by default
+        if (!isset($options['verify'])) {
+            $options['verify'] = true;
+        }
+
+        $params = [];
+        $context = $this->getDefaultContext($request);
+
+        if (isset($options['on_headers']) && !is_callable($options['on_headers'])) {
+            throw new \InvalidArgumentException('on_headers must be callable');
+        }
+
+        if (!empty($options)) {
+            foreach ($options as $key => $value) {
+                $method = "add_{$key}";
+                if (isset($methods[$method])) {
+                    $this->{$method}($request, $context, $value, $params);
+                }
+            }
+        }
+
+        if (isset($options['stream_context'])) {
+            if (!is_array($options['stream_context'])) {
+                throw new \InvalidArgumentException('stream_context must be an array');
+            }
+            $context = array_replace_recursive(
+                $context,
+                $options['stream_context']
+            );
+        }
+
+        // Microsoft NTLM authentication only supported with curl handler
+        if (isset($options['auth'])
+            && is_array($options['auth'])
+            && isset($options['auth'][2])
+            && 'ntlm' == $options['auth'][2]
+        ) {
+            throw new \InvalidArgumentException('Microsoft NTLM authentication only supported with curl handler');
+        }
+
+        $uri = $this->resolveHost($request, $options);
+
+        $context = $this->createResource(
+            function () use ($context, $params) {
+                return stream_context_create($context, $params);
+            }
+        );
+
+        return $this->createResource(
+            function () use ($uri, &$http_response_header, $context, $options) {
+                $resource = fopen((string) $uri, 'r', null, $context);
+                $this->lastHeaders = $http_response_header;
+
+                if (isset($options['read_timeout'])) {
+                    $readTimeout = $options['read_timeout'];
+                    $sec = (int) $readTimeout;
+                    $usec = ($readTimeout - $sec) * 100000;
+                    stream_set_timeout($resource, $sec, $usec);
+                }
+
+                return $resource;
+            }
+        );
+    }
+
+    private function resolveHost(RequestInterface $request, array $options)
+    {
+        $uri = $request->getUri();
+
+        if (isset($options['force_ip_resolve']) && !filter_var($uri->getHost(), FILTER_VALIDATE_IP)) {
+            if ('v4' === $options['force_ip_resolve']) {
+                $records = dns_get_record($uri->getHost(), DNS_A);
+                if (!isset($records[0]['ip'])) {
+                    throw new ConnectException(sprintf("Could not resolve IPv4 address for host '%s'", $uri->getHost()), $request);
+                }
+                $uri = $uri->withHost($records[0]['ip']);
+            } elseif ('v6' === $options['force_ip_resolve']) {
+                $records = dns_get_record($uri->getHost(), DNS_AAAA);
+                if (!isset($records[0]['ipv6'])) {
+                    throw new ConnectException(sprintf("Could not resolve IPv6 address for host '%s'", $uri->getHost()), $request);
+                }
+                $uri = $uri->withHost('[' . $records[0]['ipv6'] . ']');
+            }
+        }
+
+        return $uri;
+    }
+
+    private function getDefaultContext(RequestInterface $request)
+    {
+        $headers = '';
+        foreach ($request->getHeaders() as $name => $value) {
+            foreach ($value as $val) {
+                $headers .= "$name: $val\r\n";
+            }
+        }
+
+        $context = [
+            'http' => [
+                'method'           => $request->getMethod(),
+                'header'           => $headers,
+                'protocol_version' => $request->getProtocolVersion(),
+                'ignore_errors'    => true,
+                'follow_location'  => 0,
+            ],
+        ];
+
+        $body = (string) $request->getBody();
+
+        if (!empty($body)) {
+            $context['http']['content'] = $body;
+            // Prevent the HTTP handler from adding a Content-Type header.
+            if (!$request->hasHeader('Content-Type')) {
+                $context['http']['header'] .= "Content-Type:\r\n";
+            }
+        }
+
+        $context['http']['header'] = rtrim($context['http']['header']);
+
+        return $context;
+    }
+
+    private function add_proxy(RequestInterface $request, &$options, $value, &$params)
+    {
+        if (!is_array($value)) {
+            $options['http']['proxy'] = $value;
+        } else {
+            $scheme = $request->getUri()->getScheme();
+            if (isset($value[$scheme])) {
+                if (!isset($value['no'])
+                    || !\GuzzleHttp\is_host_in_noproxy(
+                        $request->getUri()->getHost(),
+                        $value['no']
+                    )
+                ) {
+                    $options['http']['proxy'] = $value[$scheme];
+                }
+            }
+        }
+    }
+
+    private function add_timeout(RequestInterface $request, &$options, $value, &$params)
+    {
+        if ($value > 0) {
+            $options['http']['timeout'] = $value;
+        }
+    }
+
+    private function add_verify(RequestInterface $request, &$options, $value, &$params)
+    {
+        if ($value === true) {
+            // PHP 5.6 or greater will find the system cert by default. When
+            // < 5.6, use the Guzzle bundled cacert.
+            if (PHP_VERSION_ID < 50600) {
+                $options['ssl']['cafile'] = \GuzzleHttp\default_ca_bundle();
+            }
+        } elseif (is_string($value)) {
+            $options['ssl']['cafile'] = $value;
+            if (!file_exists($value)) {
+                throw new \RuntimeException("SSL CA bundle not found: $value");
+            }
+        } elseif ($value === false) {
+            $options['ssl']['verify_peer'] = false;
+            $options['ssl']['verify_peer_name'] = false;
+            return;
+        } else {
+            throw new \InvalidArgumentException('Invalid verify request option');
+        }
+
+        $options['ssl']['verify_peer'] = true;
+        $options['ssl']['verify_peer_name'] = true;
+        $options['ssl']['allow_self_signed'] = false;
+    }
+
+    private function add_cert(RequestInterface $request, &$options, $value, &$params)
+    {
+        if (is_array($value)) {
+            $options['ssl']['passphrase'] = $value[1];
+            $value = $value[0];
+        }
+
+        if (!file_exists($value)) {
+            throw new \RuntimeException("SSL certificate not found: {$value}");
+        }
+
+        $options['ssl']['local_cert'] = $value;
+    }
+
+    private function add_progress(RequestInterface $request, &$options, $value, &$params)
+    {
+        $this->addNotification(
+            $params,
+            function ($code, $a, $b, $c, $transferred, $total) use ($value) {
+                if ($code == STREAM_NOTIFY_PROGRESS) {
+                    $value($total, $transferred, null, null);
+                }
+            }
+        );
+    }
+
+    private function add_debug(RequestInterface $request, &$options, $value, &$params)
+    {
+        if ($value === false) {
+            return;
+        }
+
+        static $map = [
+            STREAM_NOTIFY_CONNECT       => 'CONNECT',
+            STREAM_NOTIFY_AUTH_REQUIRED => 'AUTH_REQUIRED',
+            STREAM_NOTIFY_AUTH_RESULT   => 'AUTH_RESULT',
+            STREAM_NOTIFY_MIME_TYPE_IS  => 'MIME_TYPE_IS',
+            STREAM_NOTIFY_FILE_SIZE_IS  => 'FILE_SIZE_IS',
+            STREAM_NOTIFY_REDIRECTED    => 'REDIRECTED',
+            STREAM_NOTIFY_PROGRESS      => 'PROGRESS',
+            STREAM_NOTIFY_FAILURE       => 'FAILURE',
+            STREAM_NOTIFY_COMPLETED     => 'COMPLETED',
+            STREAM_NOTIFY_RESOLVE       => 'RESOLVE',
+        ];
+        static $args = ['severity', 'message', 'message_code',
+            'bytes_transferred', 'bytes_max'];
+
+        $value = \GuzzleHttp\debug_resource($value);
+        $ident = $request->getMethod() . ' ' . $request->getUri()->withFragment('');
+        $this->addNotification(
+            $params,
+            function () use ($ident, $value, $map, $args) {
+                $passed = func_get_args();
+                $code = array_shift($passed);
+                fprintf($value, '<%s> [%s] ', $ident, $map[$code]);
+                foreach (array_filter($passed) as $i => $v) {
+                    fwrite($value, $args[$i] . ': "' . $v . '" ');
+                }
+                fwrite($value, "\n");
+            }
+        );
+    }
+
+    private function addNotification(array &$params, callable $notify)
+    {
+        // Wrap the existing function if needed.
+        if (!isset($params['notification'])) {
+            $params['notification'] = $notify;
+        } else {
+            $params['notification'] = $this->callArray([
+                $params['notification'],
+                $notify
+            ]);
+        }
+    }
+
+    private function callArray(array $functions)
+    {
+        return function () use ($functions) {
+            $args = func_get_args();
+            foreach ($functions as $fn) {
+                call_user_func_array($fn, $args);
+            }
+        };
+    }
+}

vendor/guzzlehttp/guzzle/src/HandlerStack.php

@@ -0,0 +1,273 @@
+<?php
+namespace GuzzleHttp;
+
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Creates a composed Guzzle handler function by stacking middlewares on top of
+ * an HTTP handler function.
+ */
+class HandlerStack
+{
+    /** @var callable */
+    private $handler;
+
+    /** @var array */
+    private $stack = [];
+
+    /** @var callable|null */
+    private $cached;
+
+    /**
+     * Creates a default handler stack that can be used by clients.
+     *
+     * The returned handler will wrap the provided handler or use the most
+     * appropriate default handler for your system. The returned HandlerStack has
+     * support for cookies, redirects, HTTP error exceptions, and preparing a body
+     * before sending.
+     *
+     * The returned handler stack can be passed to a client in the "handler"
+     * option.
+     *
+     * @param callable $handler HTTP handler function to use with the stack. If no
+     *                          handler is provided, the best handler for your
+     *                          system will be utilized.
+     *
+     * @return HandlerStack
+     */
+    public static function create(callable $handler = null)
+    {
+        $stack = new self($handler ?: choose_handler());
+        $stack->push(Middleware::httpErrors(), 'http_errors');
+        $stack->push(Middleware::redirect(), 'allow_redirects');
+        $stack->push(Middleware::cookies(), 'cookies');
+        $stack->push(Middleware::prepareBody(), 'prepare_body');
+
+        return $stack;
+    }
+
+    /**
+     * @param callable $handler Underlying HTTP handler.
+     */
+    public function __construct(callable $handler = null)
+    {
+        $this->handler = $handler;
+    }
+
+    /**
+     * Invokes the handler stack as a composed handler
+     *
+     * @param RequestInterface $request
+     * @param array            $options
+     */
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        $handler = $this->resolve();
+
+        return $handler($request, $options);
+    }
+
+    /**
+     * Dumps a string representation of the stack.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        $depth = 0;
+        $stack = [];
+        if ($this->handler) {
+            $stack[] = "0) Handler: " . $this->debugCallable($this->handler);
+        }
+
+        $result = '';
+        foreach (array_reverse($this->stack) as $tuple) {
+            $depth++;
+            $str = "{$depth}) Name: '{$tuple[1]}', ";
+            $str .= "Function: " . $this->debugCallable($tuple[0]);
+            $result = "> {$str}\n{$result}";
+            $stack[] = $str;
+        }
+
+        foreach (array_keys($stack) as $k) {
+            $result .= "< {$stack[$k]}\n";
+        }
+
+        return $result;
+    }
+
+    /**
+     * Set the HTTP handler that actually returns a promise.
+     *
+     * @param callable $handler Accepts a request and array of options and
+     *                          returns a Promise.
+     */
+    public function setHandler(callable $handler)
+    {
+        $this->handler = $handler;
+        $this->cached = null;
+    }
+
+    /**
+     * Returns true if the builder has a handler.
+     *
+     * @return bool
+     */
+    public function hasHandler()
+    {
+        return (bool) $this->handler;
+    }
+
+    /**
+     * Unshift a middleware to the bottom of the stack.
+     *
+     * @param callable $middleware Middleware function
+     * @param string   $name       Name to register for this middleware.
+     */
+    public function unshift(callable $middleware, $name = null)
+    {
+        array_unshift($this->stack, [$middleware, $name]);
+        $this->cached = null;
+    }
+
+    /**
+     * Push a middleware to the top of the stack.
+     *
+     * @param callable $middleware Middleware function
+     * @param string   $name       Name to register for this middleware.
+     */
+    public function push(callable $middleware, $name = '')
+    {
+        $this->stack[] = [$middleware, $name];
+        $this->cached = null;
+    }
+
+    /**
+     * Add a middleware before another middleware by name.
+     *
+     * @param string   $findName   Middleware to find
+     * @param callable $middleware Middleware function
+     * @param string   $withName   Name to register for this middleware.
+     */
+    public function before($findName, callable $middleware, $withName = '')
+    {
+        $this->splice($findName, $withName, $middleware, true);
+    }
+
+    /**
+     * Add a middleware after another middleware by name.
+     *
+     * @param string   $findName   Middleware to find
+     * @param callable $middleware Middleware function
+     * @param string   $withName   Name to register for this middleware.
+     */
+    public function after($findName, callable $middleware, $withName = '')
+    {
+        $this->splice($findName, $withName, $middleware, false);
+    }
+
+    /**
+     * Remove a middleware by instance or name from the stack.
+     *
+     * @param callable|string $remove Middleware to remove by instance or name.
+     */
+    public function remove($remove)
+    {
+        $this->cached = null;
+        $idx = is_callable($remove) ? 0 : 1;
+        $this->stack = array_values(array_filter(
+            $this->stack,
+            function ($tuple) use ($idx, $remove) {
+                return $tuple[$idx] !== $remove;
+            }
+        ));
+    }
+
+    /**
+     * Compose the middleware and handler into a single callable function.
+     *
+     * @return callable
+     */
+    public function resolve()
+    {
+        if (!$this->cached) {
+            if (!($prev = $this->handler)) {
+                throw new \LogicException('No handler has been specified');
+            }
+
+            foreach (array_reverse($this->stack) as $fn) {
+                $prev = $fn[0]($prev);
+            }
+
+            $this->cached = $prev;
+        }
+
+        return $this->cached;
+    }
+
+    /**
+     * @param $name
+     * @return int
+     */
+    private function findByName($name)
+    {
+        foreach ($this->stack as $k => $v) {
+            if ($v[1] === $name) {
+                return $k;
+            }
+        }
+
+        throw new \InvalidArgumentException("Middleware not found: $name");
+    }
+
+    /**
+     * Splices a function into the middleware list at a specific position.
+     *
+     * @param          $findName
+     * @param          $withName
+     * @param callable $middleware
+     * @param          $before
+     */
+    private function splice($findName, $withName, callable $middleware, $before)
+    {
+        $this->cached = null;
+        $idx = $this->findByName($findName);
+        $tuple = [$middleware, $withName];
+
+        if ($before) {
+            if ($idx === 0) {
+                array_unshift($this->stack, $tuple);
+            } else {
+                $replacement = [$tuple, $this->stack[$idx]];
+                array_splice($this->stack, $idx, 1, $replacement);
+            }
+        } elseif ($idx === count($this->stack) - 1) {
+            $this->stack[] = $tuple;
+        } else {
+            $replacement = [$this->stack[$idx], $tuple];
+            array_splice($this->stack, $idx, 1, $replacement);
+        }
+    }
+
+    /**
+     * Provides a debug string for a given callable.
+     *
+     * @param array|callable $fn Function to write as a string.
+     *
+     * @return string
+     */
+    private function debugCallable($fn)
+    {
+        if (is_string($fn)) {
+            return "callable({$fn})";
+        }
+
+        if (is_array($fn)) {
+            return is_string($fn[0])
+                ? "callable({$fn[0]}::{$fn[1]})"
+                : "callable(['" . get_class($fn[0]) . "', '{$fn[1]}'])";
+        }
+
+        return 'callable(' . spl_object_hash($fn) . ')';
+    }
+}

vendor/guzzlehttp/guzzle/src/MessageFormatter.php

@@ -0,0 +1,180 @@
+<?php
+namespace GuzzleHttp;
+
+use Psr\Http\Message\MessageInterface;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Formats log messages using variable substitutions for requests, responses,
+ * and other transactional data.
+ *
+ * The following variable substitutions are supported:
+ *
+ * - {request}:        Full HTTP request message
+ * - {response}:       Full HTTP response message
+ * - {ts}:             ISO 8601 date in GMT
+ * - {date_iso_8601}   ISO 8601 date in GMT
+ * - {date_common_log} Apache common log date using the configured timezone.
+ * - {host}:           Host of the request
+ * - {method}:         Method of the request
+ * - {uri}:            URI of the request
+ * - {version}:        Protocol version
+ * - {target}:         Request target of the request (path + query + fragment)
+ * - {hostname}:       Hostname of the machine that sent the request
+ * - {code}:           Status code of the response (if available)
+ * - {phrase}:         Reason phrase of the response  (if available)
+ * - {error}:          Any error messages (if available)
+ * - {req_header_*}:   Replace `*` with the lowercased name of a request header to add to the message
+ * - {res_header_*}:   Replace `*` with the lowercased name of a response header to add to the message
+ * - {req_headers}:    Request headers
+ * - {res_headers}:    Response headers
+ * - {req_body}:       Request body
+ * - {res_body}:       Response body
+ */
+class MessageFormatter
+{
+    /**
+     * Apache Common Log Format.
+     * @link http://httpd.apache.org/docs/2.4/logs.html#common
+     * @var string
+     */
+    const CLF = "{hostname} {req_header_User-Agent} - [{date_common_log}] \"{method} {target} HTTP/{version}\" {code} {res_header_Content-Length}";
+    const DEBUG = ">>>>>>>>\n{request}\n<<<<<<<<\n{response}\n--------\n{error}";
+    const SHORT = '[{ts}] "{method} {target} HTTP/{version}" {code}';
+
+    /** @var string Template used to format log messages */
+    private $template;
+
+    /**
+     * @param string $template Log message template
+     */
+    public function __construct($template = self::CLF)
+    {
+        $this->template = $template ?: self::CLF;
+    }
+
+    /**
+     * Returns a formatted message string.
+     *
+     * @param RequestInterface  $request  Request that was sent
+     * @param ResponseInterface $response Response that was received
+     * @param \Exception        $error    Exception that was received
+     *
+     * @return string
+     */
+    public function format(
+        RequestInterface $request,
+        ResponseInterface $response = null,
+        \Exception $error = null
+    ) {
+        $cache = [];
+
+        return preg_replace_callback(
+            '/{\s*([A-Za-z_\-\.0-9]+)\s*}/',
+            function (array $matches) use ($request, $response, $error, &$cache) {
+                if (isset($cache[$matches[1]])) {
+                    return $cache[$matches[1]];
+                }
+
+                $result = '';
+                switch ($matches[1]) {
+                    case 'request':
+                        $result = Psr7\str($request);
+                        break;
+                    case 'response':
+                        $result = $response ? Psr7\str($response) : '';
+                        break;
+                    case 'req_headers':
+                        $result = trim($request->getMethod()
+                                . ' ' . $request->getRequestTarget())
+                            . ' HTTP/' . $request->getProtocolVersion() . "\r\n"
+                            . $this->headers($request);
+                        break;
+                    case 'res_headers':
+                        $result = $response ?
+                            sprintf(
+                                'HTTP/%s %d %s',
+                                $response->getProtocolVersion(),
+                                $response->getStatusCode(),
+                                $response->getReasonPhrase()
+                            ) . "\r\n" . $this->headers($response)
+                            : 'NULL';
+                        break;
+                    case 'req_body':
+                        $result = $request->getBody();
+                        break;
+                    case 'res_body':
+                        $result = $response ? $response->getBody() : 'NULL';
+                        break;
+                    case 'ts':
+                    case 'date_iso_8601':
+                        $result = gmdate('c');
+                        break;
+                    case 'date_common_log':
+                        $result = date('d/M/Y:H:i:s O');
+                        break;
+                    case 'method':
+                        $result = $request->getMethod();
+                        break;
+                    case 'version':
+                        $result = $request->getProtocolVersion();
+                        break;
+                    case 'uri':
+                    case 'url':
+                        $result = $request->getUri();
+                        break;
+                    case 'target':
+                        $result = $request->getRequestTarget();
+                        break;
+                    case 'req_version':
+                        $result = $request->getProtocolVersion();
+                        break;
+                    case 'res_version':
+                        $result = $response
+                            ? $response->getProtocolVersion()
+                            : 'NULL';
+                        break;
+                    case 'host':
+                        $result = $request->getHeaderLine('Host');
+                        break;
+                    case 'hostname':
+                        $result = gethostname();
+                        break;
+                    case 'code':
+                        $result = $response ? $response->getStatusCode() : 'NULL';
+                        break;
+                    case 'phrase':
+                        $result = $response ? $response->getReasonPhrase() : 'NULL';
+                        break;
+                    case 'error':
+                        $result = $error ? $error->getMessage() : 'NULL';
+                        break;
+                    default:
+                        // handle prefixed dynamic headers
+                        if (strpos($matches[1], 'req_header_') === 0) {
+                            $result = $request->getHeaderLine(substr($matches[1], 11));
+                        } elseif (strpos($matches[1], 'res_header_') === 0) {
+                            $result = $response
+                                ? $response->getHeaderLine(substr($matches[1], 11))
+                                : 'NULL';
+                        }
+                }
+
+                $cache[$matches[1]] = $result;
+                return $result;
+            },
+            $this->template
+        );
+    }
+
+    private function headers(MessageInterface $message)
+    {
+        $result = '';
+        foreach ($message->getHeaders() as $name => $values) {
+            $result .= $name . ': ' . implode(', ', $values) . "\r\n";
+        }
+
+        return trim($result);
+    }
+}

vendor/guzzlehttp/guzzle/src/Middleware.php

@@ -0,0 +1,255 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Cookie\CookieJarInterface;
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\Promise\RejectedPromise;
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Log\LoggerInterface;
+use Psr\Log\LogLevel;
+
+/**
+ * Functions used to create and wrap handlers with handler middleware.
+ */
+final class Middleware
+{
+    /**
+     * Middleware that adds cookies to requests.
+     *
+     * The options array must be set to a CookieJarInterface in order to use
+     * cookies. This is typically handled for you by a client.
+     *
+     * @return callable Returns a function that accepts the next handler.
+     */
+    public static function cookies()
+    {
+        return function (callable $handler) {
+            return function ($request, array $options) use ($handler) {
+                if (empty($options['cookies'])) {
+                    return $handler($request, $options);
+                } elseif (!($options['cookies'] instanceof CookieJarInterface)) {
+                    throw new \InvalidArgumentException('cookies must be an instance of GuzzleHttp\Cookie\CookieJarInterface');
+                }
+                $cookieJar = $options['cookies'];
+                $request = $cookieJar->withCookieHeader($request);
+                return $handler($request, $options)
+                    ->then(
+                        function ($response) use ($cookieJar, $request) {
+                            $cookieJar->extractCookies($request, $response);
+                            return $response;
+                        }
+                );
+            };
+        };
+    }
+
+    /**
+     * Middleware that throws exceptions for 4xx or 5xx responses when the
+     * "http_error" request option is set to true.
+     *
+     * @return callable Returns a function that accepts the next handler.
+     */
+    public static function httpErrors()
+    {
+        return function (callable $handler) {
+            return function ($request, array $options) use ($handler) {
+                if (empty($options['http_errors'])) {
+                    return $handler($request, $options);
+                }
+                return $handler($request, $options)->then(
+                    function (ResponseInterface $response) use ($request, $handler) {
+                        $code = $response->getStatusCode();
+                        if ($code < 400) {
+                            return $response;
+                        }
+                        throw RequestException::create($request, $response);
+                    }
+                );
+            };
+        };
+    }
+
+    /**
+     * Middleware that pushes history data to an ArrayAccess container.
+     *
+     * @param array|\ArrayAccess $container Container to hold the history (by reference).
+     *
+     * @return callable Returns a function that accepts the next handler.
+     * @throws \InvalidArgumentException if container is not an array or ArrayAccess.
+     */
+    public static function history(&$container)
+    {
+        if (!is_array($container) && !$container instanceof \ArrayAccess) {
+            throw new \InvalidArgumentException('history container must be an array or object implementing ArrayAccess');
+        }
+
+        return function (callable $handler) use (&$container) {
+            return function ($request, array $options) use ($handler, &$container) {
+                return $handler($request, $options)->then(
+                    function ($value) use ($request, &$container, $options) {
+                        $container[] = [
+                            'request'  => $request,
+                            'response' => $value,
+                            'error'    => null,
+                            'options'  => $options
+                        ];
+                        return $value;
+                    },
+                    function ($reason) use ($request, &$container, $options) {
+                        $container[] = [
+                            'request'  => $request,
+                            'response' => null,
+                            'error'    => $reason,
+                            'options'  => $options
+                        ];
+                        return \GuzzleHttp\Promise\rejection_for($reason);
+                    }
+                );
+            };
+        };
+    }
+
+    /**
+     * Middleware that invokes a callback before and after sending a request.
+     *
+     * The provided listener cannot modify or alter the response. It simply
+     * "taps" into the chain to be notified before returning the promise. The
+     * before listener accepts a request and options array, and the after
+     * listener accepts a request, options array, and response promise.
+     *
+     * @param callable $before Function to invoke before forwarding the request.
+     * @param callable $after  Function invoked after forwarding.
+     *
+     * @return callable Returns a function that accepts the next handler.
+     */
+    public static function tap(callable $before = null, callable $after = null)
+    {
+        return function (callable $handler) use ($before, $after) {
+            return function ($request, array $options) use ($handler, $before, $after) {
+                if ($before) {
+                    $before($request, $options);
+                }
+                $response = $handler($request, $options);
+                if ($after) {
+                    $after($request, $options, $response);
+                }
+                return $response;
+            };
+        };
+    }
+
+    /**
+     * Middleware that handles request redirects.
+     *
+     * @return callable Returns a function that accepts the next handler.
+     */
+    public static function redirect()
+    {
+        return function (callable $handler) {
+            return new RedirectMiddleware($handler);
+        };
+    }
+
+    /**
+     * Middleware that retries requests based on the boolean result of
+     * invoking the provided "decider" function.
+     *
+     * If no delay function is provided, a simple implementation of exponential
+     * backoff will be utilized.
+     *
+     * @param callable $decider Function that accepts the number of retries,
+     *                          a request, [response], and [exception] and
+     *                          returns true if the request is to be retried.
+     * @param callable $delay   Function that accepts the number of retries and
+     *                          returns the number of milliseconds to delay.
+     *
+     * @return callable Returns a function that accepts the next handler.
+     */
+    public static function retry(callable $decider, callable $delay = null)
+    {
+        return function (callable $handler) use ($decider, $delay) {
+            return new RetryMiddleware($decider, $handler, $delay);
+        };
+    }
+
+    /**
+     * Middleware that logs requests, responses, and errors using a message
+     * formatter.
+     *
+     * @param LoggerInterface  $logger Logs messages.
+     * @param MessageFormatter $formatter Formatter used to create message strings.
+     * @param string           $logLevel Level at which to log requests.
+     *
+     * @return callable Returns a function that accepts the next handler.
+     */
+    public static function log(LoggerInterface $logger, MessageFormatter $formatter, $logLevel = LogLevel::INFO)
+    {
+        return function (callable $handler) use ($logger, $formatter, $logLevel) {
+            return function ($request, array $options) use ($handler, $logger, $formatter, $logLevel) {
+                return $handler($request, $options)->then(
+                    function ($response) use ($logger, $request, $formatter, $logLevel) {
+                        $message = $formatter->format($request, $response);
+                        $logger->log($logLevel, $message);
+                        return $response;
+                    },
+                    function ($reason) use ($logger, $request, $formatter) {
+                        $response = $reason instanceof RequestException
+                            ? $reason->getResponse()
+                            : null;
+                        $message = $formatter->format($request, $response, $reason);
+                        $logger->notice($message);
+                        return \GuzzleHttp\Promise\rejection_for($reason);
+                    }
+                );
+            };
+        };
+    }
+
+    /**
+     * This middleware adds a default content-type if possible, a default
+     * content-length or transfer-encoding header, and the expect header.
+     *
+     * @return callable
+     */
+    public static function prepareBody()
+    {
+        return function (callable $handler) {
+            return new PrepareBodyMiddleware($handler);
+        };
+    }
+
+    /**
+     * Middleware that applies a map function to the request before passing to
+     * the next handler.
+     *
+     * @param callable $fn Function that accepts a RequestInterface and returns
+     *                     a RequestInterface.
+     * @return callable
+     */
+    public static function mapRequest(callable $fn)
+    {
+        return function (callable $handler) use ($fn) {
+            return function ($request, array $options) use ($handler, $fn) {
+                return $handler($fn($request), $options);
+            };
+        };
+    }
+
+    /**
+     * Middleware that applies a map function to the resolved promise's
+     * response.
+     *
+     * @param callable $fn Function that accepts a ResponseInterface and
+     *                     returns a ResponseInterface.
+     * @return callable
+     */
+    public static function mapResponse(callable $fn)
+    {
+        return function (callable $handler) use ($fn) {
+            return function ($request, array $options) use ($handler, $fn) {
+                return $handler($request, $options)->then($fn);
+            };
+        };
+    }
+}

vendor/guzzlehttp/guzzle/src/Pool.php

@@ -0,0 +1,123 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Promise\PromisorInterface;
+use Psr\Http\Message\RequestInterface;
+use GuzzleHttp\Promise\EachPromise;
+
+/**
+ * Sends and iterator of requests concurrently using a capped pool size.
+ *
+ * The pool will read from an iterator until it is cancelled or until the
+ * iterator is consumed. When a request is yielded, the request is sent after
+ * applying the "request_options" request options (if provided in the ctor).
+ *
+ * When a function is yielded by the iterator, the function is provided the
+ * "request_options" array that should be merged on top of any existing
+ * options, and the function MUST then return a wait-able promise.
+ */
+class Pool implements PromisorInterface
+{
+    /** @var EachPromise */
+    private $each;
+
+    /**
+     * @param ClientInterface $client   Client used to send the requests.
+     * @param array|\Iterator $requests Requests or functions that return
+     *                                  requests to send concurrently.
+     * @param array           $config   Associative array of options
+     *     - concurrency: (int) Maximum number of requests to send concurrently
+     *     - options: Array of request options to apply to each request.
+     *     - fulfilled: (callable) Function to invoke when a request completes.
+     *     - rejected: (callable) Function to invoke when a request is rejected.
+     */
+    public function __construct(
+        ClientInterface $client,
+        $requests,
+        array $config = []
+    ) {
+        // Backwards compatibility.
+        if (isset($config['pool_size'])) {
+            $config['concurrency'] = $config['pool_size'];
+        } elseif (!isset($config['concurrency'])) {
+            $config['concurrency'] = 25;
+        }
+
+        if (isset($config['options'])) {
+            $opts = $config['options'];
+            unset($config['options']);
+        } else {
+            $opts = [];
+        }
+
+        $iterable = \GuzzleHttp\Promise\iter_for($requests);
+        $requests = function () use ($iterable, $client, $opts) {
+            foreach ($iterable as $key => $rfn) {
+                if ($rfn instanceof RequestInterface) {
+                    yield $key => $client->sendAsync($rfn, $opts);
+                } elseif (is_callable($rfn)) {
+                    yield $key => $rfn($opts);
+                } else {
+                    throw new \InvalidArgumentException('Each value yielded by '
+                        . 'the iterator must be a Psr7\Http\Message\RequestInterface '
+                        . 'or a callable that returns a promise that fulfills '
+                        . 'with a Psr7\Message\Http\ResponseInterface object.');
+                }
+            }
+        };
+
+        $this->each = new EachPromise($requests(), $config);
+    }
+
+    public function promise()
+    {
+        return $this->each->promise();
+    }
+
+    /**
+     * Sends multiple requests concurrently and returns an array of responses
+     * and exceptions that uses the same ordering as the provided requests.
+     *
+     * IMPORTANT: This method keeps every request and response in memory, and
+     * as such, is NOT recommended when sending a large number or an
+     * indeterminate number of requests concurrently.
+     *
+     * @param ClientInterface $client   Client used to send the requests
+     * @param array|\Iterator $requests Requests to send concurrently.
+     * @param array           $options  Passes through the options available in
+     *                                  {@see GuzzleHttp\Pool::__construct}
+     *
+     * @return array Returns an array containing the response or an exception
+     *               in the same order that the requests were sent.
+     * @throws \InvalidArgumentException if the event format is incorrect.
+     */
+    public static function batch(
+        ClientInterface $client,
+        $requests,
+        array $options = []
+    ) {
+        $res = [];
+        self::cmpCallback($options, 'fulfilled', $res);
+        self::cmpCallback($options, 'rejected', $res);
+        $pool = new static($client, $requests, $options);
+        $pool->promise()->wait();
+        ksort($res);
+
+        return $res;
+    }
+
+    private static function cmpCallback(array &$options, $name, array &$results)
+    {
+        if (!isset($options[$name])) {
+            $options[$name] = function ($v, $k) use (&$results) {
+                $results[$k] = $v;
+            };
+        } else {
+            $currentFn = $options[$name];
+            $options[$name] = function ($v, $k) use (&$results, $currentFn) {
+                $currentFn($v, $k);
+                $results[$k] = $v;
+            };
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php

@@ -0,0 +1,106 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Prepares requests that contain a body, adding the Content-Length,
+ * Content-Type, and Expect headers.
+ */
+class PrepareBodyMiddleware
+{
+    /** @var callable  */
+    private $nextHandler;
+
+    /**
+     * @param callable $nextHandler Next handler to invoke.
+     */
+    public function __construct(callable $nextHandler)
+    {
+        $this->nextHandler = $nextHandler;
+    }
+
+    /**
+     * @param RequestInterface $request
+     * @param array            $options
+     *
+     * @return PromiseInterface
+     */
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        $fn = $this->nextHandler;
+
+        // Don't do anything if the request has no body.
+        if ($request->getBody()->getSize() === 0) {
+            return $fn($request, $options);
+        }
+
+        $modify = [];
+
+        // Add a default content-type if possible.
+        if (!$request->hasHeader('Content-Type')) {
+            if ($uri = $request->getBody()->getMetadata('uri')) {
+                if ($type = Psr7\mimetype_from_filename($uri)) {
+                    $modify['set_headers']['Content-Type'] = $type;
+                }
+            }
+        }
+
+        // Add a default content-length or transfer-encoding header.
+        if (!$request->hasHeader('Content-Length')
+            && !$request->hasHeader('Transfer-Encoding')
+        ) {
+            $size = $request->getBody()->getSize();
+            if ($size !== null) {
+                $modify['set_headers']['Content-Length'] = $size;
+            } else {
+                $modify['set_headers']['Transfer-Encoding'] = 'chunked';
+            }
+        }
+
+        // Add the expect header if needed.
+        $this->addExpectHeader($request, $options, $modify);
+
+        return $fn(Psr7\modify_request($request, $modify), $options);
+    }
+
+    private function addExpectHeader(
+        RequestInterface $request,
+        array $options,
+        array &$modify
+    ) {
+        // Determine if the Expect header should be used
+        if ($request->hasHeader('Expect')) {
+            return;
+        }
+
+        $expect = isset($options['expect']) ? $options['expect'] : null;
+
+        // Return if disabled or if you're not using HTTP/1.1 or HTTP/2.0
+        if ($expect === false || $request->getProtocolVersion() < 1.1) {
+            return;
+        }
+
+        // The expect header is unconditionally enabled
+        if ($expect === true) {
+            $modify['set_headers']['Expect'] = '100-Continue';
+            return;
+        }
+
+        // By default, send the expect header when the payload is > 1mb
+        if ($expect === null) {
+            $expect = 1048576;
+        }
+
+        // Always add if the body cannot be rewound, the size cannot be
+        // determined, or the size is greater than the cutoff threshold
+        $body = $request->getBody();
+        $size = $body->getSize();
+
+        if ($size === null || $size >= (int) $expect || !$body->isSeekable()) {
+            $modify['set_headers']['Expect'] = '100-Continue';
+        }
+    }
+}

vendor/guzzlehttp/guzzle/src/RedirectMiddleware.php

@@ -0,0 +1,237 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Exception\BadResponseException;
+use GuzzleHttp\Exception\TooManyRedirectsException;
+use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\UriInterface;
+
+/**
+ * Request redirect middleware.
+ *
+ * Apply this middleware like other middleware using
+ * {@see GuzzleHttp\Middleware::redirect()}.
+ */
+class RedirectMiddleware
+{
+    const HISTORY_HEADER = 'X-Guzzle-Redirect-History';
+
+    const STATUS_HISTORY_HEADER = 'X-Guzzle-Redirect-Status-History';
+
+    public static $defaultSettings = [
+        'max'             => 5,
+        'protocols'       => ['http', 'https'],
+        'strict'          => false,
+        'referer'         => false,
+        'track_redirects' => false,
+    ];
+
+    /** @var callable  */
+    private $nextHandler;
+
+    /**
+     * @param callable $nextHandler Next handler to invoke.
+     */
+    public function __construct(callable $nextHandler)
+    {
+        $this->nextHandler = $nextHandler;
+    }
+
+    /**
+     * @param RequestInterface $request
+     * @param array            $options
+     *
+     * @return PromiseInterface
+     */
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        $fn = $this->nextHandler;
+
+        if (empty($options['allow_redirects'])) {
+            return $fn($request, $options);
+        }
+
+        if ($options['allow_redirects'] === true) {
+            $options['allow_redirects'] = self::$defaultSettings;
+        } elseif (!is_array($options['allow_redirects'])) {
+            throw new \InvalidArgumentException('allow_redirects must be true, false, or array');
+        } else {
+            // Merge the default settings with the provided settings
+            $options['allow_redirects'] += self::$defaultSettings;
+        }
+
+        if (empty($options['allow_redirects']['max'])) {
+            return $fn($request, $options);
+        }
+
+        return $fn($request, $options)
+            ->then(function (ResponseInterface $response) use ($request, $options) {
+                return $this->checkRedirect($request, $options, $response);
+            });
+    }
+
+    /**
+     * @param RequestInterface  $request
+     * @param array             $options
+     * @param ResponseInterface|PromiseInterface $response
+     *
+     * @return ResponseInterface|PromiseInterface
+     */
+    public function checkRedirect(
+        RequestInterface $request,
+        array $options,
+        ResponseInterface $response
+    ) {
+        if (substr($response->getStatusCode(), 0, 1) != '3'
+            || !$response->hasHeader('Location')
+        ) {
+            return $response;
+        }
+
+        $this->guardMax($request, $options);
+        $nextRequest = $this->modifyRequest($request, $options, $response);
+
+        if (isset($options['allow_redirects']['on_redirect'])) {
+            call_user_func(
+                $options['allow_redirects']['on_redirect'],
+                $request,
+                $response,
+                $nextRequest->getUri()
+            );
+        }
+
+        /** @var PromiseInterface|ResponseInterface $promise */
+        $promise = $this($nextRequest, $options);
+
+        // Add headers to be able to track history of redirects.
+        if (!empty($options['allow_redirects']['track_redirects'])) {
+            return $this->withTracking(
+                $promise,
+                (string) $nextRequest->getUri(),
+                $response->getStatusCode()
+            );
+        }
+
+        return $promise;
+    }
+
+    private function withTracking(PromiseInterface $promise, $uri, $statusCode)
+    {
+        return $promise->then(
+            function (ResponseInterface $response) use ($uri, $statusCode) {
+                // Note that we are pushing to the front of the list as this
+                // would be an earlier response than what is currently present
+                // in the history header.
+                $historyHeader = $response->getHeader(self::HISTORY_HEADER);
+                $statusHeader = $response->getHeader(self::STATUS_HISTORY_HEADER);
+                array_unshift($historyHeader, $uri);
+                array_unshift($statusHeader, $statusCode);
+                return $response->withHeader(self::HISTORY_HEADER, $historyHeader)
+                                ->withHeader(self::STATUS_HISTORY_HEADER, $statusHeader);
+            }
+        );
+    }
+
+    private function guardMax(RequestInterface $request, array &$options)
+    {
+        $current = isset($options['__redirect_count'])
+            ? $options['__redirect_count']
+            : 0;
+        $options['__redirect_count'] = $current + 1;
+        $max = $options['allow_redirects']['max'];
+
+        if ($options['__redirect_count'] > $max) {
+            throw new TooManyRedirectsException(
+                "Will not follow more than {$max} redirects",
+                $request
+            );
+        }
+    }
+
+    /**
+     * @param RequestInterface  $request
+     * @param array             $options
+     * @param ResponseInterface $response
+     *
+     * @return RequestInterface
+     */
+    public function modifyRequest(
+        RequestInterface $request,
+        array $options,
+        ResponseInterface $response
+    ) {
+        // Request modifications to apply.
+        $modify = [];
+        $protocols = $options['allow_redirects']['protocols'];
+
+        // Use a GET request if this is an entity enclosing request and we are
+        // not forcing RFC compliance, but rather emulating what all browsers
+        // would do.
+        $statusCode = $response->getStatusCode();
+        if ($statusCode == 303 ||
+            ($statusCode <= 302 && $request->getBody() && !$options['allow_redirects']['strict'])
+        ) {
+            $modify['method'] = 'GET';
+            $modify['body'] = '';
+        }
+
+        $modify['uri'] = $this->redirectUri($request, $response, $protocols);
+        Psr7\rewind_body($request);
+
+        // Add the Referer header if it is told to do so and only
+        // add the header if we are not redirecting from https to http.
+        if ($options['allow_redirects']['referer']
+            && $modify['uri']->getScheme() === $request->getUri()->getScheme()
+        ) {
+            $uri = $request->getUri()->withUserInfo('', '');
+            $modify['set_headers']['Referer'] = (string) $uri;
+        } else {
+            $modify['remove_headers'][] = 'Referer';
+        }
+
+        // Remove Authorization header if host is different.
+        if ($request->getUri()->getHost() !== $modify['uri']->getHost()) {
+            $modify['remove_headers'][] = 'Authorization';
+        }
+
+        return Psr7\modify_request($request, $modify);
+    }
+
+    /**
+     * Set the appropriate URL on the request based on the location header
+     *
+     * @param RequestInterface  $request
+     * @param ResponseInterface $response
+     * @param array             $protocols
+     *
+     * @return UriInterface
+     */
+    private function redirectUri(
+        RequestInterface $request,
+        ResponseInterface $response,
+        array $protocols
+    ) {
+        $location = Psr7\UriResolver::resolve(
+            $request->getUri(),
+            new Psr7\Uri($response->getHeaderLine('Location'))
+        );
+
+        // Ensure that the redirect URI is allowed based on the protocols.
+        if (!in_array($location->getScheme(), $protocols)) {
+            throw new BadResponseException(
+                sprintf(
+                    'Redirect URI, %s, does not use one of the allowed redirect protocols: %s',
+                    $location,
+                    implode(', ', $protocols)
+                ),
+                $request,
+                $response
+            );
+        }
+
+        return $location;
+    }
+}

vendor/guzzlehttp/guzzle/src/RequestOptions.php

@@ -0,0 +1,255 @@
+<?php
+namespace GuzzleHttp;
+
+/**
+ * This class contains a list of built-in Guzzle request options.
+ *
+ * More documentation for each option can be found at http://guzzlephp.org/.
+ *
+ * @link http://docs.guzzlephp.org/en/v6/request-options.html
+ */
+final class RequestOptions
+{
+    /**
+     * allow_redirects: (bool|array) Controls redirect behavior. Pass false
+     * to disable redirects, pass true to enable redirects, pass an
+     * associative to provide custom redirect settings. Defaults to "false".
+     * This option only works if your handler has the RedirectMiddleware. When
+     * passing an associative array, you can provide the following key value
+     * pairs:
+     *
+     * - max: (int, default=5) maximum number of allowed redirects.
+     * - strict: (bool, default=false) Set to true to use strict redirects
+     *   meaning redirect POST requests with POST requests vs. doing what most
+     *   browsers do which is redirect POST requests with GET requests
+     * - referer: (bool, default=true) Set to false to disable the Referer
+     *   header.
+     * - protocols: (array, default=['http', 'https']) Allowed redirect
+     *   protocols.
+     * - on_redirect: (callable) PHP callable that is invoked when a redirect
+     *   is encountered. The callable is invoked with the request, the redirect
+     *   response that was received, and the effective URI. Any return value
+     *   from the on_redirect function is ignored.
+     */
+    const ALLOW_REDIRECTS = 'allow_redirects';
+
+    /**
+     * auth: (array) Pass an array of HTTP authentication parameters to use
+     * with the request. The array must contain the username in index [0],
+     * the password in index [1], and you can optionally provide a built-in
+     * authentication type in index [2]. Pass null to disable authentication
+     * for a request.
+     */
+    const AUTH = 'auth';
+
+    /**
+     * body: (resource|string|null|int|float|StreamInterface|callable|\Iterator)
+     * Body to send in the request.
+     */
+    const BODY = 'body';
+
+    /**
+     * cert: (string|array) Set to a string to specify the path to a file
+     * containing a PEM formatted SSL client side certificate. If a password
+     * is required, then set cert to an array containing the path to the PEM
+     * file in the first array element followed by the certificate password
+     * in the second array element.
+     */
+    const CERT = 'cert';
+
+    /**
+     * cookies: (bool|GuzzleHttp\Cookie\CookieJarInterface, default=false)
+     * Specifies whether or not cookies are used in a request or what cookie
+     * jar to use or what cookies to send. This option only works if your
+     * handler has the `cookie` middleware. Valid values are `false` and
+     * an instance of {@see GuzzleHttp\Cookie\CookieJarInterface}.
+     */
+    const COOKIES = 'cookies';
+
+    /**
+     * connect_timeout: (float, default=0) Float describing the number of
+     * seconds to wait while trying to connect to a server. Use 0 to wait
+     * indefinitely (the default behavior).
+     */
+    const CONNECT_TIMEOUT = 'connect_timeout';
+
+    /**
+     * debug: (bool|resource) Set to true or set to a PHP stream returned by
+     * fopen()  enable debug output with the HTTP handler used to send a
+     * request.
+     */
+    const DEBUG = 'debug';
+
+    /**
+     * decode_content: (bool, default=true) Specify whether or not
+     * Content-Encoding responses (gzip, deflate, etc.) are automatically
+     * decoded.
+     */
+    const DECODE_CONTENT = 'decode_content';
+
+    /**
+     * delay: (int) The amount of time to delay before sending in milliseconds.
+     */
+    const DELAY = 'delay';
+
+    /**
+     * expect: (bool|integer) Controls the behavior of the
+     * "Expect: 100-Continue" header.
+     *
+     * Set to `true` to enable the "Expect: 100-Continue" header for all
+     * requests that sends a body. Set to `false` to disable the
+     * "Expect: 100-Continue" header for all requests. Set to a number so that
+     * the size of the payload must be greater than the number in order to send
+     * the Expect header. Setting to a number will send the Expect header for
+     * all requests in which the size of the payload cannot be determined or
+     * where the body is not rewindable.
+     *
+     * By default, Guzzle will add the "Expect: 100-Continue" header when the
+     * size of the body of a request is greater than 1 MB and a request is
+     * using HTTP/1.1.
+     */
+    const EXPECT = 'expect';
+
+    /**
+     * form_params: (array) Associative array of form field names to values
+     * where each value is a string or array of strings. Sets the Content-Type
+     * header to application/x-www-form-urlencoded when no Content-Type header
+     * is already present.
+     */
+    const FORM_PARAMS = 'form_params';
+
+    /**
+     * headers: (array) Associative array of HTTP headers. Each value MUST be
+     * a string or array of strings.
+     */
+    const HEADERS = 'headers';
+
+    /**
+     * http_errors: (bool, default=true) Set to false to disable exceptions
+     * when a non- successful HTTP response is received. By default,
+     * exceptions will be thrown for 4xx and 5xx responses. This option only
+     * works if your handler has the `httpErrors` middleware.
+     */
+    const HTTP_ERRORS = 'http_errors';
+
+    /**
+     * json: (mixed) Adds JSON data to a request. The provided value is JSON
+     * encoded and a Content-Type header of application/json will be added to
+     * the request if no Content-Type header is already present.
+     */
+    const JSON = 'json';
+
+    /**
+     * multipart: (array) Array of associative arrays, each containing a
+     * required "name" key mapping to the form field, name, a required
+     * "contents" key mapping to a StreamInterface|resource|string, an
+     * optional "headers" associative array of custom headers, and an
+     * optional "filename" key mapping to a string to send as the filename in
+     * the part. If no "filename" key is present, then no "filename" attribute
+     * will be added to the part.
+     */
+    const MULTIPART = 'multipart';
+
+    /**
+     * on_headers: (callable) A callable that is invoked when the HTTP headers
+     * of the response have been received but the body has not yet begun to
+     * download.
+     */
+    const ON_HEADERS = 'on_headers';
+
+    /**
+     * on_stats: (callable) allows you to get access to transfer statistics of
+     * a request and access the lower level transfer details of the handler
+     * associated with your client. ``on_stats`` is a callable that is invoked
+     * when a handler has finished sending a request. The callback is invoked
+     * with transfer statistics about the request, the response received, or
+     * the error encountered. Included in the data is the total amount of time
+     * taken to send the request.
+     */
+    const ON_STATS = 'on_stats';
+
+    /**
+     * progress: (callable) Defines a function to invoke when transfer
+     * progress is made. The function accepts the following positional
+     * arguments: the total number of bytes expected to be downloaded, the
+     * number of bytes downloaded so far, the number of bytes expected to be
+     * uploaded, the number of bytes uploaded so far.
+     */
+    const PROGRESS = 'progress';
+
+    /**
+     * proxy: (string|array) Pass a string to specify an HTTP proxy, or an
+     * array to specify different proxies for different protocols (where the
+     * key is the protocol and the value is a proxy string).
+     */
+    const PROXY = 'proxy';
+
+    /**
+     * query: (array|string) Associative array of query string values to add
+     * to the request. This option uses PHP's http_build_query() to create
+     * the string representation. Pass a string value if you need more
+     * control than what this method provides
+     */
+    const QUERY = 'query';
+
+    /**
+     * sink: (resource|string|StreamInterface) Where the data of the
+     * response is written to. Defaults to a PHP temp stream. Providing a
+     * string will write data to a file by the given name.
+     */
+    const SINK = 'sink';
+
+    /**
+     * synchronous: (bool) Set to true to inform HTTP handlers that you intend
+     * on waiting on the response. This can be useful for optimizations. Note
+     * that a promise is still returned if you are using one of the async
+     * client methods.
+     */
+    const SYNCHRONOUS = 'synchronous';
+
+    /**
+     * ssl_key: (array|string) Specify the path to a file containing a private
+     * SSL key in PEM format. If a password is required, then set to an array
+     * containing the path to the SSL key in the first array element followed
+     * by the password required for the certificate in the second element.
+     */
+    const SSL_KEY = 'ssl_key';
+
+    /**
+     * stream: Set to true to attempt to stream a response rather than
+     * download it all up-front.
+     */
+    const STREAM = 'stream';
+
+    /**
+     * verify: (bool|string, default=true) Describes the SSL certificate
+     * verification behavior of a request. Set to true to enable SSL
+     * certificate verification using the system CA bundle when available
+     * (the default). Set to false to disable certificate verification (this
+     * is insecure!). Set to a string to provide the path to a CA bundle on
+     * disk to enable verification using a custom certificate.
+     */
+    const VERIFY = 'verify';
+
+    /**
+     * timeout: (float, default=0) Float describing the timeout of the
+     * request in seconds. Use 0 to wait indefinitely (the default behavior).
+     */
+    const TIMEOUT = 'timeout';
+
+    /**
+     * read_timeout: (float, default=default_socket_timeout ini setting) Float describing
+     * the body read timeout, for stream requests.
+     */
+    const READ_TIMEOUT = 'read_timeout';
+
+    /**
+     * version: (float) Specifies the HTTP protocol version to attempt to use.
+     */
+    const VERSION = 'version';
+
+    /**
+     * force_ip_resolve: (bool) Force client to use only ipv4 or ipv6 protocol
+     */
+    const FORCE_IP_RESOLVE = 'force_ip_resolve';
+}

vendor/guzzlehttp/guzzle/src/RetryMiddleware.php

@@ -0,0 +1,112 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Promise\PromiseInterface;
+use GuzzleHttp\Promise\RejectedPromise;
+use GuzzleHttp\Psr7;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Middleware that retries requests based on the boolean result of
+ * invoking the provided "decider" function.
+ */
+class RetryMiddleware
+{
+    /** @var callable  */
+    private $nextHandler;
+
+    /** @var callable */
+    private $decider;
+
+    /**
+     * @param callable $decider     Function that accepts the number of retries,
+     *                              a request, [response], and [exception] and
+     *                              returns true if the request is to be
+     *                              retried.
+     * @param callable $nextHandler Next handler to invoke.
+     * @param callable $delay       Function that accepts the number of retries
+     *                              and [response] and returns the number of
+     *                              milliseconds to delay.
+     */
+    public function __construct(
+        callable $decider,
+        callable $nextHandler,
+        callable $delay = null
+    ) {
+        $this->decider = $decider;
+        $this->nextHandler = $nextHandler;
+        $this->delay = $delay ?: __CLASS__ . '::exponentialDelay';
+    }
+
+    /**
+     * Default exponential backoff delay function.
+     *
+     * @param $retries
+     *
+     * @return int
+     */
+    public static function exponentialDelay($retries)
+    {
+        return (int) pow(2, $retries - 1);
+    }
+
+    /**
+     * @param RequestInterface $request
+     * @param array            $options
+     *
+     * @return PromiseInterface
+     */
+    public function __invoke(RequestInterface $request, array $options)
+    {
+        if (!isset($options['retries'])) {
+            $options['retries'] = 0;
+        }
+
+        $fn = $this->nextHandler;
+        return $fn($request, $options)
+            ->then(
+                $this->onFulfilled($request, $options),
+                $this->onRejected($request, $options)
+            );
+    }
+
+    private function onFulfilled(RequestInterface $req, array $options)
+    {
+        return function ($value) use ($req, $options) {
+            if (!call_user_func(
+                $this->decider,
+                $options['retries'],
+                $req,
+                $value,
+                null
+            )) {
+                return $value;
+            }
+            return $this->doRetry($req, $options, $value);
+        };
+    }
+
+    private function onRejected(RequestInterface $req, array $options)
+    {
+        return function ($reason) use ($req, $options) {
+            if (!call_user_func(
+                $this->decider,
+                $options['retries'],
+                $req,
+                null,
+                $reason
+            )) {
+                return \GuzzleHttp\Promise\rejection_for($reason);
+            }
+            return $this->doRetry($req, $options);
+        };
+    }
+
+    private function doRetry(RequestInterface $request, array $options, ResponseInterface $response = null)
+    {
+        $options['delay'] = call_user_func($this->delay, ++$options['retries'], $response);
+
+        return $this($request, $options);
+    }
+}

vendor/guzzlehttp/guzzle/src/TransferStats.php

@@ -0,0 +1,126 @@
+<?php
+namespace GuzzleHttp;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\UriInterface;
+
+/**
+ * Represents data at the point after it was transferred either successfully
+ * or after a network error.
+ */
+final class TransferStats
+{
+    private $request;
+    private $response;
+    private $transferTime;
+    private $handlerStats;
+    private $handlerErrorData;
+
+    /**
+     * @param RequestInterface  $request          Request that was sent.
+     * @param ResponseInterface $response         Response received (if any)
+     * @param null              $transferTime     Total handler transfer time.
+     * @param mixed             $handlerErrorData Handler error data.
+     * @param array             $handlerStats     Handler specific stats.
+     */
+    public function __construct(
+        RequestInterface $request,
+        ResponseInterface $response = null,
+        $transferTime = null,
+        $handlerErrorData = null,
+        $handlerStats = []
+    ) {
+        $this->request = $request;
+        $this->response = $response;
+        $this->transferTime = $transferTime;
+        $this->handlerErrorData = $handlerErrorData;
+        $this->handlerStats = $handlerStats;
+    }
+
+    /**
+     * @return RequestInterface
+     */
+    public function getRequest()
+    {
+        return $this->request;
+    }
+
+    /**
+     * Returns the response that was received (if any).
+     *
+     * @return ResponseInterface|null
+     */
+    public function getResponse()
+    {
+        return $this->response;
+    }
+
+    /**
+     * Returns true if a response was received.
+     *
+     * @return bool
+     */
+    public function hasResponse()
+    {
+        return $this->response !== null;
+    }
+
+    /**
+     * Gets handler specific error data.
+     *
+     * This might be an exception, a integer representing an error code, or
+     * anything else. Relying on this value assumes that you know what handler
+     * you are using.
+     *
+     * @return mixed
+     */
+    public function getHandlerErrorData()
+    {
+        return $this->handlerErrorData;
+    }
+
+    /**
+     * Get the effective URI the request was sent to.
+     *
+     * @return UriInterface
+     */
+    public function getEffectiveUri()
+    {
+        return $this->request->getUri();
+    }
+
+    /**
+     * Get the estimated time the request was being transferred by the handler.
+     *
+     * @return float Time in seconds.
+     */
+    public function getTransferTime()
+    {
+        return $this->transferTime;
+    }
+
+    /**
+     * Gets an array of all of the handler specific transfer data.
+     *
+     * @return array
+     */
+    public function getHandlerStats()
+    {
+        return $this->handlerStats;
+    }
+
+    /**
+     * Get a specific handler statistic from the handler by name.
+     *
+     * @param string $stat Handler specific transfer stat to retrieve.
+     *
+     * @return mixed|null
+     */
+    public function getHandlerStat($stat)
+    {
+        return isset($this->handlerStats[$stat])
+            ? $this->handlerStats[$stat]
+            : null;
+    }
+}

vendor/guzzlehttp/guzzle/src/UriTemplate.php

@@ -0,0 +1,237 @@
+<?php
+namespace GuzzleHttp;
+
+/**
+ * Expands URI templates. Userland implementation of PECL uri_template.
+ *
+ * @link http://tools.ietf.org/html/rfc6570
+ */
+class UriTemplate
+{
+    /** @var string URI template */
+    private $template;
+
+    /** @var array Variables to use in the template expansion */
+    private $variables;
+
+    /** @var array Hash for quick operator lookups */
+    private static $operatorHash = [
+        ''  => ['prefix' => '',  'joiner' => ',', 'query' => false],
+        '+' => ['prefix' => '',  'joiner' => ',', 'query' => false],
+        '#' => ['prefix' => '#', 'joiner' => ',', 'query' => false],
+        '.' => ['prefix' => '.', 'joiner' => '.', 'query' => false],
+        '/' => ['prefix' => '/', 'joiner' => '/', 'query' => false],
+        ';' => ['prefix' => ';', 'joiner' => ';', 'query' => true],
+        '?' => ['prefix' => '?', 'joiner' => '&', 'query' => true],
+        '&' => ['prefix' => '&', 'joiner' => '&', 'query' => true]
+    ];
+
+    /** @var array Delimiters */
+    private static $delims = [':', '/', '?', '#', '[', ']', '@', '!', '$',
+        '&', '\'', '(', ')', '*', '+', ',', ';', '='];
+
+    /** @var array Percent encoded delimiters */
+    private static $delimsPct = ['%3A', '%2F', '%3F', '%23', '%5B', '%5D',
+        '%40', '%21', '%24', '%26', '%27', '%28', '%29', '%2A', '%2B', '%2C',
+        '%3B', '%3D'];
+
+    public function expand($template, array $variables)
+    {
+        if (false === strpos($template, '{')) {
+            return $template;
+        }
+
+        $this->template = $template;
+        $this->variables = $variables;
+
+        return preg_replace_callback(
+            '/\{([^\}]+)\}/',
+            [$this, 'expandMatch'],
+            $this->template
+        );
+    }
+
+    /**
+     * Parse an expression into parts
+     *
+     * @param string $expression Expression to parse
+     *
+     * @return array Returns an associative array of parts
+     */
+    private function parseExpression($expression)
+    {
+        $result = [];
+
+        if (isset(self::$operatorHash[$expression[0]])) {
+            $result['operator'] = $expression[0];
+            $expression = substr($expression, 1);
+        } else {
+            $result['operator'] = '';
+        }
+
+        foreach (explode(',', $expression) as $value) {
+            $value = trim($value);
+            $varspec = [];
+            if ($colonPos = strpos($value, ':')) {
+                $varspec['value'] = substr($value, 0, $colonPos);
+                $varspec['modifier'] = ':';
+                $varspec['position'] = (int) substr($value, $colonPos + 1);
+            } elseif (substr($value, -1) === '*') {
+                $varspec['modifier'] = '*';
+                $varspec['value'] = substr($value, 0, -1);
+            } else {
+                $varspec['value'] = (string) $value;
+                $varspec['modifier'] = '';
+            }
+            $result['values'][] = $varspec;
+        }
+
+        return $result;
+    }
+
+    /**
+     * Process an expansion
+     *
+     * @param array $matches Matches met in the preg_replace_callback
+     *
+     * @return string Returns the replacement string
+     */
+    private function expandMatch(array $matches)
+    {
+        static $rfc1738to3986 = ['+' => '%20', '%7e' => '~'];
+
+        $replacements = [];
+        $parsed = self::parseExpression($matches[1]);
+        $prefix = self::$operatorHash[$parsed['operator']]['prefix'];
+        $joiner = self::$operatorHash[$parsed['operator']]['joiner'];
+        $useQuery = self::$operatorHash[$parsed['operator']]['query'];
+
+        foreach ($parsed['values'] as $value) {
+            if (!isset($this->variables[$value['value']])) {
+                continue;
+            }
+
+            $variable = $this->variables[$value['value']];
+            $actuallyUseQuery = $useQuery;
+            $expanded = '';
+
+            if (is_array($variable)) {
+                $isAssoc = $this->isAssoc($variable);
+                $kvp = [];
+                foreach ($variable as $key => $var) {
+                    if ($isAssoc) {
+                        $key = rawurlencode($key);
+                        $isNestedArray = is_array($var);
+                    } else {
+                        $isNestedArray = false;
+                    }
+
+                    if (!$isNestedArray) {
+                        $var = rawurlencode($var);
+                        if ($parsed['operator'] === '+' ||
+                            $parsed['operator'] === '#'
+                        ) {
+                            $var = $this->decodeReserved($var);
+                        }
+                    }
+
+                    if ($value['modifier'] === '*') {
+                        if ($isAssoc) {
+                            if ($isNestedArray) {
+                                // Nested arrays must allow for deeply nested
+                                // structures.
+                                $var = strtr(
+                                    http_build_query([$key => $var]),
+                                    $rfc1738to3986
+                                );
+                            } else {
+                                $var = $key . '=' . $var;
+                            }
+                        } elseif ($key > 0 && $actuallyUseQuery) {
+                            $var = $value['value'] . '=' . $var;
+                        }
+                    }
+
+                    $kvp[$key] = $var;
+                }
+
+                if (empty($variable)) {
+                    $actuallyUseQuery = false;
+                } elseif ($value['modifier'] === '*') {
+                    $expanded = implode($joiner, $kvp);
+                    if ($isAssoc) {
+                        // Don't prepend the value name when using the explode
+                        // modifier with an associative array.
+                        $actuallyUseQuery = false;
+                    }
+                } else {
+                    if ($isAssoc) {
+                        // When an associative array is encountered and the
+                        // explode modifier is not set, then the result must be
+                        // a comma separated list of keys followed by their
+                        // respective values.
+                        foreach ($kvp as $k => &$v) {
+                            $v = $k . ',' . $v;
+                        }
+                    }
+                    $expanded = implode(',', $kvp);
+                }
+            } else {
+                if ($value['modifier'] === ':') {
+                    $variable = substr($variable, 0, $value['position']);
+                }
+                $expanded = rawurlencode($variable);
+                if ($parsed['operator'] === '+' || $parsed['operator'] === '#') {
+                    $expanded = $this->decodeReserved($expanded);
+                }
+            }
+
+            if ($actuallyUseQuery) {
+                if (!$expanded && $joiner !== '&') {
+                    $expanded = $value['value'];
+                } else {
+                    $expanded = $value['value'] . '=' . $expanded;
+                }
+            }
+
+            $replacements[] = $expanded;
+        }
+
+        $ret = implode($joiner, $replacements);
+        if ($ret && $prefix) {
+            return $prefix . $ret;
+        }
+
+        return $ret;
+    }
+
+    /**
+     * Determines if an array is associative.
+     *
+     * This makes the assumption that input arrays are sequences or hashes.
+     * This assumption is a tradeoff for accuracy in favor of speed, but it
+     * should work in almost every case where input is supplied for a URI
+     * template.
+     *
+     * @param array $array Array to check
+     *
+     * @return bool
+     */
+    private function isAssoc(array $array)
+    {
+        return $array && array_keys($array)[0] !== 0;
+    }
+
+    /**
+     * Removes percent encoding on reserved characters (used with + and #
+     * modifiers).
+     *
+     * @param string $string String to fix
+     *
+     * @return string
+     */
+    private function decodeReserved($string)
+    {
+        return str_replace(self::$delimsPct, self::$delims, $string);
+    }
+}

vendor/guzzlehttp/guzzle/src/functions.php

@@ -0,0 +1,333 @@
+<?php
+namespace GuzzleHttp;
+
+use GuzzleHttp\Handler\CurlHandler;
+use GuzzleHttp\Handler\CurlMultiHandler;
+use GuzzleHttp\Handler\Proxy;
+use GuzzleHttp\Handler\StreamHandler;
+
+/**
+ * Expands a URI template
+ *
+ * @param string $template  URI template
+ * @param array  $variables Template variables
+ *
+ * @return string
+ */
+function uri_template($template, array $variables)
+{
+    if (extension_loaded('uri_template')) {
+        // @codeCoverageIgnoreStart
+        return \uri_template($template, $variables);
+        // @codeCoverageIgnoreEnd
+    }
+
+    static $uriTemplate;
+    if (!$uriTemplate) {
+        $uriTemplate = new UriTemplate();
+    }
+
+    return $uriTemplate->expand($template, $variables);
+}
+
+/**
+ * Debug function used to describe the provided value type and class.
+ *
+ * @param mixed $input
+ *
+ * @return string Returns a string containing the type of the variable and
+ *                if a class is provided, the class name.
+ */
+function describe_type($input)
+{
+    switch (gettype($input)) {
+        case 'object':
+            return 'object(' . get_class($input) . ')';
+        case 'array':
+            return 'array(' . count($input) . ')';
+        default:
+            ob_start();
+            var_dump($input);
+            // normalize float vs double
+            return str_replace('double(', 'float(', rtrim(ob_get_clean()));
+    }
+}
+
+/**
+ * Parses an array of header lines into an associative array of headers.
+ *
+ * @param array $lines Header lines array of strings in the following
+ *                     format: "Name: Value"
+ * @return array
+ */
+function headers_from_lines($lines)
+{
+    $headers = [];
+
+    foreach ($lines as $line) {
+        $parts = explode(':', $line, 2);
+        $headers[trim($parts[0])][] = isset($parts[1])
+            ? trim($parts[1])
+            : null;
+    }
+
+    return $headers;
+}
+
+/**
+ * Returns a debug stream based on the provided variable.
+ *
+ * @param mixed $value Optional value
+ *
+ * @return resource
+ */
+function debug_resource($value = null)
+{
+    if (is_resource($value)) {
+        return $value;
+    } elseif (defined('STDOUT')) {
+        return STDOUT;
+    }
+
+    return fopen('php://output', 'w');
+}
+
+/**
+ * Chooses and creates a default handler to use based on the environment.
+ *
+ * The returned handler is not wrapped by any default middlewares.
+ *
+ * @throws \RuntimeException if no viable Handler is available.
+ * @return callable Returns the best handler for the given system.
+ */
+function choose_handler()
+{
+    $handler = null;
+    if (function_exists('curl_multi_exec') && function_exists('curl_exec')) {
+        $handler = Proxy::wrapSync(new CurlMultiHandler(), new CurlHandler());
+    } elseif (function_exists('curl_exec')) {
+        $handler = new CurlHandler();
+    } elseif (function_exists('curl_multi_exec')) {
+        $handler = new CurlMultiHandler();
+    }
+
+    if (ini_get('allow_url_fopen')) {
+        $handler = $handler
+            ? Proxy::wrapStreaming($handler, new StreamHandler())
+            : new StreamHandler();
+    } elseif (!$handler) {
+        throw new \RuntimeException('GuzzleHttp requires cURL, the '
+            . 'allow_url_fopen ini setting, or a custom HTTP handler.');
+    }
+
+    return $handler;
+}
+
+/**
+ * Get the default User-Agent string to use with Guzzle
+ *
+ * @return string
+ */
+function default_user_agent()
+{
+    static $defaultAgent = '';
+
+    if (!$defaultAgent) {
+        $defaultAgent = 'GuzzleHttp/' . Client::VERSION;
+        if (extension_loaded('curl') && function_exists('curl_version')) {
+            $defaultAgent .= ' curl/' . \curl_version()['version'];
+        }
+        $defaultAgent .= ' PHP/' . PHP_VERSION;
+    }
+
+    return $defaultAgent;
+}
+
+/**
+ * Returns the default cacert bundle for the current system.
+ *
+ * First, the openssl.cafile and curl.cainfo php.ini settings are checked.
+ * If those settings are not configured, then the common locations for
+ * bundles found on Red Hat, CentOS, Fedora, Ubuntu, Debian, FreeBSD, OS X
+ * and Windows are checked. If any of these file locations are found on
+ * disk, they will be utilized.
+ *
+ * Note: the result of this function is cached for subsequent calls.
+ *
+ * @return string
+ * @throws \RuntimeException if no bundle can be found.
+ */
+function default_ca_bundle()
+{
+    static $cached = null;
+    static $cafiles = [
+        // Red Hat, CentOS, Fedora (provided by the ca-certificates package)
+        '/etc/pki/tls/certs/ca-bundle.crt',
+        // Ubuntu, Debian (provided by the ca-certificates package)
+        '/etc/ssl/certs/ca-certificates.crt',
+        // FreeBSD (provided by the ca_root_nss package)
+        '/usr/local/share/certs/ca-root-nss.crt',
+        // SLES 12 (provided by the ca-certificates package)
+        '/var/lib/ca-certificates/ca-bundle.pem',
+        // OS X provided by homebrew (using the default path)
+        '/usr/local/etc/openssl/cert.pem',
+        // Google app engine
+        '/etc/ca-certificates.crt',
+        // Windows?
+        'C:\\windows\\system32\\curl-ca-bundle.crt',
+        'C:\\windows\\curl-ca-bundle.crt',
+    ];
+
+    if ($cached) {
+        return $cached;
+    }
+
+    if ($ca = ini_get('openssl.cafile')) {
+        return $cached = $ca;
+    }
+
+    if ($ca = ini_get('curl.cainfo')) {
+        return $cached = $ca;
+    }
+
+    foreach ($cafiles as $filename) {
+        if (file_exists($filename)) {
+            return $cached = $filename;
+        }
+    }
+
+    throw new \RuntimeException(<<< EOT
+No system CA bundle could be found in any of the the common system locations.
+PHP versions earlier than 5.6 are not properly configured to use the system's
+CA bundle by default. In order to verify peer certificates, you will need to
+supply the path on disk to a certificate bundle to the 'verify' request
+option: http://docs.guzzlephp.org/en/latest/clients.html#verify. If you do not
+need a specific certificate bundle, then Mozilla provides a commonly used CA
+bundle which can be downloaded here (provided by the maintainer of cURL):
+https://raw.githubusercontent.com/bagder/ca-bundle/master/ca-bundle.crt. Once
+you have a CA bundle available on disk, you can set the 'openssl.cafile' PHP
+ini setting to point to the path to the file, allowing you to omit the 'verify'
+request option. See http://curl.haxx.se/docs/sslcerts.html for more
+information.
+EOT
+    );
+}
+
+/**
+ * Creates an associative array of lowercase header names to the actual
+ * header casing.
+ *
+ * @param array $headers
+ *
+ * @return array
+ */
+function normalize_header_keys(array $headers)
+{
+    $result = [];
+    foreach (array_keys($headers) as $key) {
+        $result[strtolower($key)] = $key;
+    }
+
+    return $result;
+}
+
+/**
+ * Returns true if the provided host matches any of the no proxy areas.
+ *
+ * This method will strip a port from the host if it is present. Each pattern
+ * can be matched with an exact match (e.g., "foo.com" == "foo.com") or a
+ * partial match: (e.g., "foo.com" == "baz.foo.com" and ".foo.com" ==
+ * "baz.foo.com", but ".foo.com" != "foo.com").
+ *
+ * Areas are matched in the following cases:
+ * 1. "*" (without quotes) always matches any hosts.
+ * 2. An exact match.
+ * 3. The area starts with "." and the area is the last part of the host. e.g.
+ *    '.mit.edu' will match any host that ends with '.mit.edu'.
+ *
+ * @param string $host         Host to check against the patterns.
+ * @param array  $noProxyArray An array of host patterns.
+ *
+ * @return bool
+ */
+function is_host_in_noproxy($host, array $noProxyArray)
+{
+    if (strlen($host) === 0) {
+        throw new \InvalidArgumentException('Empty host provided');
+    }
+
+    // Strip port if present.
+    if (strpos($host, ':')) {
+        $host = explode($host, ':', 2)[0];
+    }
+
+    foreach ($noProxyArray as $area) {
+        // Always match on wildcards.
+        if ($area === '*') {
+            return true;
+        } elseif (empty($area)) {
+            // Don't match on empty values.
+            continue;
+        } elseif ($area === $host) {
+            // Exact matches.
+            return true;
+        } else {
+            // Special match if the area when prefixed with ".". Remove any
+            // existing leading "." and add a new leading ".".
+            $area = '.' . ltrim($area, '.');
+            if (substr($host, -(strlen($area))) === $area) {
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+/**
+ * Wrapper for json_decode that throws when an error occurs.
+ *
+ * @param string $json    JSON data to parse
+ * @param bool $assoc     When true, returned objects will be converted
+ *                        into associative arrays.
+ * @param int    $depth   User specified recursion depth.
+ * @param int    $options Bitmask of JSON decode options.
+ *
+ * @return mixed
+ * @throws \InvalidArgumentException if the JSON cannot be decoded.
+ * @link http://www.php.net/manual/en/function.json-decode.php
+ */
+function json_decode($json, $assoc = false, $depth = 512, $options = 0)
+{
+    $data = \json_decode($json, $assoc, $depth, $options);
+    if (JSON_ERROR_NONE !== json_last_error()) {
+        throw new \InvalidArgumentException(
+            'json_decode error: ' . json_last_error_msg()
+        );
+    }
+
+    return $data;
+}
+
+/**
+ * Wrapper for JSON encoding that throws when an error occurs.
+ *
+ * @param mixed $value   The value being encoded
+ * @param int    $options JSON encode option bitmask
+ * @param int    $depth   Set the maximum depth. Must be greater than zero.
+ *
+ * @return string
+ * @throws \InvalidArgumentException if the JSON cannot be encoded.
+ * @link http://www.php.net/manual/en/function.json-encode.php
+ */
+function json_encode($value, $options = 0, $depth = 512)
+{
+    $json = \json_encode($value, $options, $depth);
+    if (JSON_ERROR_NONE !== json_last_error()) {
+        throw new \InvalidArgumentException(
+            'json_encode error: ' . json_last_error_msg()
+        );
+    }
+
+    return $json;
+}

vendor/guzzlehttp/guzzle/src/functions_include.php

@@ -0,0 +1,6 @@
+<?php
+
+// Don't redefine the functions if included multiple times.
+if (!function_exists('GuzzleHttp\uri_template')) {
+    require __DIR__ . '/functions.php';
+}

vendor/guzzlehttp/promises/CHANGELOG.md

@@ -0,0 +1,65 @@
+# CHANGELOG
+
+
+## 1.3.1 - 2016-12-20
+
+### Fixed
+
+- `wait()` foreign promise compatibility
+
+
+## 1.3.0 - 2016-11-18
+
+### Added
+
+- Adds support for custom task queues.
+
+### Fixed
+
+- Fixed coroutine promise memory leak.
+
+
+## 1.2.0 - 2016-05-18
+
+### Changed
+
+- Update to now catch `\Throwable` on PHP 7+
+
+
+## 1.1.0 - 2016-03-07
+
+### Changed
+
+- Update EachPromise to prevent recurring on a iterator when advancing, as this
+  could trigger fatal generator errors.
+- Update Promise to allow recursive waiting without unwrapping exceptions.
+
+
+## 1.0.3 - 2015-10-15
+
+### Changed
+
+- Update EachPromise to immediately resolve when the underlying promise iterator
+  is empty. Previously, such a promise would throw an exception when its `wait`
+  function was called.
+
+
+## 1.0.2 - 2015-05-15
+
+### Changed
+
+- Conditionally require functions.php.
+
+
+## 1.0.1 - 2015-06-24
+
+### Changed
+
+- Updating EachPromise to call next on the underlying promise iterator as late
+  as possible to ensure that generators that generate new requests based on
+  callbacks are not iterated until after callbacks are invoked.
+
+
+## 1.0.0 - 2015-05-12
+
+- Initial release

vendor/guzzlehttp/promises/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2015-2016 Michael Dowling, https://github.com/mtdowling <mtdowling@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/guzzlehttp/promises/Makefile

@@ -0,0 +1,13 @@
+all: clean test
+
+test:
+	vendor/bin/phpunit
+
+coverage:
+	vendor/bin/phpunit --coverage-html=artifacts/coverage
+
+view-coverage:
+	open artifacts/coverage/index.html
+
+clean:
+	rm -rf artifacts/*

vendor/guzzlehttp/promises/README.md

@@ -0,0 +1,504 @@
+# Guzzle Promises
+
+[Promises/A+](https://promisesaplus.com/) implementation that handles promise
+chaining and resolution iteratively, allowing for "infinite" promise chaining
+while keeping the stack size constant. Read [this blog post](https://blog.domenic.me/youre-missing-the-point-of-promises/)
+for a general introduction to promises.
+
+- [Features](#features)
+- [Quick start](#quick-start)
+- [Synchronous wait](#synchronous-wait)
+- [Cancellation](#cancellation)
+- [API](#api)
+  - [Promise](#promise)
+  - [FulfilledPromise](#fulfilledpromise)
+  - [RejectedPromise](#rejectedpromise)
+- [Promise interop](#promise-interop)
+- [Implementation notes](#implementation-notes)
+
+
+# Features
+
+- [Promises/A+](https://promisesaplus.com/) implementation.
+- Promise resolution and chaining is handled iteratively, allowing for
+  "infinite" promise chaining.
+- Promises have a synchronous `wait` method.
+- Promises can be cancelled.
+- Works with any object that has a `then` function.
+- C# style async/await coroutine promises using
+  `GuzzleHttp\Promise\coroutine()`.
+
+
+# Quick start
+
+A *promise* represents the eventual result of an asynchronous operation. The
+primary way of interacting with a promise is through its `then` method, which
+registers callbacks to receive either a promise's eventual value or the reason
+why the promise cannot be fulfilled.
+
+
+## Callbacks
+
+Callbacks are registered with the `then` method by providing an optional 
+`$onFulfilled` followed by an optional `$onRejected` function.
+
+
+```php
+use GuzzleHttp\Promise\Promise;
+
+$promise = new Promise();
+$promise->then(
+    // $onFulfilled
+    function ($value) {
+        echo 'The promise was fulfilled.';
+    },
+    // $onRejected
+    function ($reason) {
+        echo 'The promise was rejected.';
+    }
+);
+```
+
+*Resolving* a promise means that you either fulfill a promise with a *value* or
+reject a promise with a *reason*. Resolving a promises triggers callbacks
+registered with the promises's `then` method. These callbacks are triggered
+only once and in the order in which they were added.
+
+
+## Resolving a promise
+
+Promises are fulfilled using the `resolve($value)` method. Resolving a promise
+with any value other than a `GuzzleHttp\Promise\RejectedPromise` will trigger
+all of the onFulfilled callbacks (resolving a promise with a rejected promise
+will reject the promise and trigger the `$onRejected` callbacks).
+
+```php
+use GuzzleHttp\Promise\Promise;
+
+$promise = new Promise();
+$promise
+    ->then(function ($value) {
+        // Return a value and don't break the chain
+        return "Hello, " . $value;
+    })
+    // This then is executed after the first then and receives the value
+    // returned from the first then.
+    ->then(function ($value) {
+        echo $value;
+    });
+
+// Resolving the promise triggers the $onFulfilled callbacks and outputs
+// "Hello, reader".
+$promise->resolve('reader.');
+```
+
+
+## Promise forwarding
+
+Promises can be chained one after the other. Each then in the chain is a new
+promise. The return value of a promise is what's forwarded to the next
+promise in the chain. Returning a promise in a `then` callback will cause the
+subsequent promises in the chain to only be fulfilled when the returned promise
+has been fulfilled. The next promise in the chain will be invoked with the
+resolved value of the promise.
+
+```php
+use GuzzleHttp\Promise\Promise;
+
+$promise = new Promise();
+$nextPromise = new Promise();
+
+$promise
+    ->then(function ($value) use ($nextPromise) {
+        echo $value;
+        return $nextPromise;
+    })
+    ->then(function ($value) {
+        echo $value;
+    });
+
+// Triggers the first callback and outputs "A"
+$promise->resolve('A');
+// Triggers the second callback and outputs "B"
+$nextPromise->resolve('B');
+```
+
+## Promise rejection
+
+When a promise is rejected, the `$onRejected` callbacks are invoked with the
+rejection reason.
+
+```php
+use GuzzleHttp\Promise\Promise;
+
+$promise = new Promise();
+$promise->then(null, function ($reason) {
+    echo $reason;
+});
+
+$promise->reject('Error!');
+// Outputs "Error!"
+```
+
+## Rejection forwarding
+
+If an exception is thrown in an `$onRejected` callback, subsequent
+`$onRejected` callbacks are invoked with the thrown exception as the reason.
+
+```php
+use GuzzleHttp\Promise\Promise;
+
+$promise = new Promise();
+$promise->then(null, function ($reason) {
+    throw new \Exception($reason);
+})->then(null, function ($reason) {
+    assert($reason->getMessage() === 'Error!');
+});
+
+$promise->reject('Error!');
+```
+
+You can also forward a rejection down the promise chain by returning a
+`GuzzleHttp\Promise\RejectedPromise` in either an `$onFulfilled` or
+`$onRejected` callback.
+
+```php
+use GuzzleHttp\Promise\Promise;
+use GuzzleHttp\Promise\RejectedPromise;
+
+$promise = new Promise();
+$promise->then(null, function ($reason) {
+    return new RejectedPromise($reason);
+})->then(null, function ($reason) {
+    assert($reason === 'Error!');
+});
+
+$promise->reject('Error!');
+```
+
+If an exception is not thrown in a `$onRejected` callback and the callback
+does not return a rejected promise, downstream `$onFulfilled` callbacks are
+invoked using the value returned from the `$onRejected` callback.
+
+```php
+use GuzzleHttp\Promise\Promise;
+use GuzzleHttp\Promise\RejectedPromise;
+
+$promise = new Promise();
+$promise
+    ->then(null, function ($reason) {
+        return "It's ok";
+    })
+    ->then(function ($value) {
+        assert($value === "It's ok");
+    });
+
+$promise->reject('Error!');
+```
+
+# Synchronous wait
+
+You can synchronously force promises to complete using a promise's `wait`
+method. When creating a promise, you can provide a wait function that is used
+to synchronously force a promise to complete. When a wait function is invoked
+it is expected to deliver a value to the promise or reject the promise. If the
+wait function does not deliver a value, then an exception is thrown. The wait
+function provided to a promise constructor is invoked when the `wait` function
+of the promise is called.
+
+```php
+$promise = new Promise(function () use (&$promise) {
+    $promise->resolve('foo');
+});
+
+// Calling wait will return the value of the promise.
+echo $promise->wait(); // outputs "foo"
+```
+
+If an exception is encountered while invoking the wait function of a promise,
+the promise is rejected with the exception and the exception is thrown.
+
+```php
+$promise = new Promise(function () use (&$promise) {
+    throw new \Exception('foo');
+});
+
+$promise->wait(); // throws the exception.
+```
+
+Calling `wait` on a promise that has been fulfilled will not trigger the wait
+function. It will simply return the previously resolved value.
+
+```php
+$promise = new Promise(function () { die('this is not called!'); });
+$promise->resolve('foo');
+echo $promise->wait(); // outputs "foo"
+```
+
+Calling `wait` on a promise that has been rejected will throw an exception. If
+the rejection reason is an instance of `\Exception` the reason is thrown.
+Otherwise, a `GuzzleHttp\Promise\RejectionException` is thrown and the reason
+can be obtained by calling the `getReason` method of the exception.
+
+```php
+$promise = new Promise();
+$promise->reject('foo');
+$promise->wait();
+```
+
+> PHP Fatal error:  Uncaught exception 'GuzzleHttp\Promise\RejectionException' with message 'The promise was rejected with value: foo'
+
+
+## Unwrapping a promise
+
+When synchronously waiting on a promise, you are joining the state of the
+promise into the current state of execution (i.e., return the value of the
+promise if it was fulfilled or throw an exception if it was rejected). This is
+called "unwrapping" the promise. Waiting on a promise will by default unwrap
+the promise state.
+
+You can force a promise to resolve and *not* unwrap the state of the promise
+by passing `false` to the first argument of the `wait` function:
+
+```php
+$promise = new Promise();
+$promise->reject('foo');
+// This will not throw an exception. It simply ensures the promise has
+// been resolved.
+$promise->wait(false);
+```
+
+When unwrapping a promise, the resolved value of the promise will be waited
+upon until the unwrapped value is not a promise. This means that if you resolve
+promise A with a promise B and unwrap promise A, the value returned by the
+wait function will be the value delivered to promise B.
+
+**Note**: when you do not unwrap the promise, no value is returned.
+
+
+# Cancellation
+
+You can cancel a promise that has not yet been fulfilled using the `cancel()`
+method of a promise. When creating a promise you can provide an optional
+cancel function that when invoked cancels the action of computing a resolution
+of the promise.
+
+
+# API
+
+
+## Promise
+
+When creating a promise object, you can provide an optional `$waitFn` and
+`$cancelFn`. `$waitFn` is a function that is invoked with no arguments and is
+expected to resolve the promise. `$cancelFn` is a function with no arguments
+that is expected to cancel the computation of a promise. It is invoked when the
+`cancel()` method of a promise is called.
+
+```php
+use GuzzleHttp\Promise\Promise;
+
+$promise = new Promise(
+    function () use (&$promise) {
+        $promise->resolve('waited');
+    },
+    function () {
+        // do something that will cancel the promise computation (e.g., close
+        // a socket, cancel a database query, etc...)
+    }
+);
+
+assert('waited' === $promise->wait());
+```
+
+A promise has the following methods:
+
+- `then(callable $onFulfilled, callable $onRejected) : PromiseInterface`
+  
+  Appends fulfillment and rejection handlers to the promise, and returns a new promise resolving to the return value of the called handler.
+
+- `otherwise(callable $onRejected) : PromiseInterface`
+  
+  Appends a rejection handler callback to the promise, and returns a new promise resolving to the return value of the callback if it is called, or to its original fulfillment value if the promise is instead fulfilled.
+
+- `wait($unwrap = true) : mixed`
+
+  Synchronously waits on the promise to complete.
+  
+  `$unwrap` controls whether or not the value of the promise is returned for a
+  fulfilled promise or if an exception is thrown if the promise is rejected.
+  This is set to `true` by default.
+
+- `cancel()`
+
+  Attempts to cancel the promise if possible. The promise being cancelled and
+  the parent most ancestor that has not yet been resolved will also be
+  cancelled. Any promises waiting on the cancelled promise to resolve will also
+  be cancelled.
+
+- `getState() : string`
+
+  Returns the state of the promise. One of `pending`, `fulfilled`, or
+  `rejected`.
+
+- `resolve($value)`
+
+  Fulfills the promise with the given `$value`.
+
+- `reject($reason)`
+
+  Rejects the promise with the given `$reason`.
+
+
+## FulfilledPromise
+
+A fulfilled promise can be created to represent a promise that has been
+fulfilled.
+
+```php
+use GuzzleHttp\Promise\FulfilledPromise;
+
+$promise = new FulfilledPromise('value');
+
+// Fulfilled callbacks are immediately invoked.
+$promise->then(function ($value) {
+    echo $value;
+});
+```
+
+
+## RejectedPromise
+
+A rejected promise can be created to represent a promise that has been
+rejected.
+
+```php
+use GuzzleHttp\Promise\RejectedPromise;
+
+$promise = new RejectedPromise('Error');
+
+// Rejected callbacks are immediately invoked.
+$promise->then(null, function ($reason) {
+    echo $reason;
+});
+```
+
+
+# Promise interop
+
+This library works with foreign promises that have a `then` method. This means
+you can use Guzzle promises with [React promises](https://github.com/reactphp/promise)
+for example. When a foreign promise is returned inside of a then method
+callback, promise resolution will occur recursively.
+
+```php
+// Create a React promise
+$deferred = new React\Promise\Deferred();
+$reactPromise = $deferred->promise();
+
+// Create a Guzzle promise that is fulfilled with a React promise.
+$guzzlePromise = new \GuzzleHttp\Promise\Promise();
+$guzzlePromise->then(function ($value) use ($reactPromise) {
+    // Do something something with the value...
+    // Return the React promise
+    return $reactPromise;
+});
+```
+
+Please note that wait and cancel chaining is no longer possible when forwarding
+a foreign promise. You will need to wrap a third-party promise with a Guzzle
+promise in order to utilize wait and cancel functions with foreign promises.
+
+
+## Event Loop Integration
+
+In order to keep the stack size constant, Guzzle promises are resolved
+asynchronously using a task queue. When waiting on promises synchronously, the
+task queue will be automatically run to ensure that the blocking promise and
+any forwarded promises are resolved. When using promises asynchronously in an
+event loop, you will need to run the task queue on each tick of the loop. If
+you do not run the task queue, then promises will not be resolved.
+
+You can run the task queue using the `run()` method of the global task queue
+instance.
+
+```php
+// Get the global task queue
+$queue = \GuzzleHttp\Promise\queue();
+$queue->run();
+```
+
+For example, you could use Guzzle promises with React using a periodic timer:
+
+```php
+$loop = React\EventLoop\Factory::create();
+$loop->addPeriodicTimer(0, [$queue, 'run']);
+```
+
+*TODO*: Perhaps adding a `futureTick()` on each tick would be faster?
+
+
+# Implementation notes
+
+
+## Promise resolution and chaining is handled iteratively
+
+By shuffling pending handlers from one owner to another, promises are
+resolved iteratively, allowing for "infinite" then chaining.
+
+```php
+<?php
+require 'vendor/autoload.php';
+
+use GuzzleHttp\Promise\Promise;
+
+$parent = new Promise();
+$p = $parent;
+
+for ($i = 0; $i < 1000; $i++) {
+    $p = $p->then(function ($v) {
+        // The stack size remains constant (a good thing)
+        echo xdebug_get_stack_depth() . ', ';
+        return $v + 1;
+    });
+}
+
+$parent->resolve(0);
+var_dump($p->wait()); // int(1000)
+
+```
+
+When a promise is fulfilled or rejected with a non-promise value, the promise
+then takes ownership of the handlers of each child promise and delivers values
+down the chain without using recursion.
+
+When a promise is resolved with another promise, the original promise transfers
+all of its pending handlers to the new promise. When the new promise is
+eventually resolved, all of the pending handlers are delivered the forwarded
+value.
+
+
+## A promise is the deferred.
+
+Some promise libraries implement promises using a deferred object to represent
+a computation and a promise object to represent the delivery of the result of
+the computation. This is a nice separation of computation and delivery because
+consumers of the promise cannot modify the value that will be eventually
+delivered.
+
+One side effect of being able to implement promise resolution and chaining
+iteratively is that you need to be able for one promise to reach into the state
+of another promise to shuffle around ownership of handlers. In order to achieve
+this without making the handlers of a promise publicly mutable, a promise is
+also the deferred value, allowing promises of the same parent class to reach
+into and modify the private properties of promises of the same type. While this
+does allow consumers of the value to modify the resolution or rejection of the
+deferred, it is a small price to pay for keeping the stack size constant.
+
+```php
+$promise = new Promise();
+$promise->then(function ($value) { echo $value; });
+// The promise is the deferred value, so you can deliver a value to it.
+$promise->resolve('foo');
+// prints "foo"
+```

vendor/guzzlehttp/promises/composer.json

@@ -0,0 +1,34 @@
+{
+    "name": "guzzlehttp/promises",
+    "description": "Guzzle promises library",
+    "keywords": ["promise"],
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Michael Dowling",
+            "email": "mtdowling@gmail.com",
+            "homepage": "https://github.com/mtdowling"
+        }
+    ],
+    "require": {
+        "php": ">=5.5.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "GuzzleHttp\\Promise\\": "src/"
+        },
+        "files": ["src/functions_include.php"]
+    },
+    "scripts": {
+        "test": "vendor/bin/phpunit",
+        "test-ci": "vendor/bin/phpunit --coverage-text"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.4-dev"
+        }
+    }
+}

vendor/guzzlehttp/promises/src/AggregateException.php

@@ -0,0 +1,16 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * Exception thrown when too many errors occur in the some() or any() methods.
+ */
+class AggregateException extends RejectionException
+{
+    public function __construct($msg, array $reasons)
+    {
+        parent::__construct(
+            $reasons,
+            sprintf('%s; %d rejected promises', $msg, count($reasons))
+        );
+    }
+}

vendor/guzzlehttp/promises/src/CancellationException.php

@@ -0,0 +1,9 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * Exception that is set as the reason for a promise that has been cancelled.
+ */
+class CancellationException extends RejectionException
+{
+}

vendor/guzzlehttp/promises/src/Coroutine.php

@@ -0,0 +1,151 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+use Exception;
+use Generator;
+use Throwable;
+
+/**
+ * Creates a promise that is resolved using a generator that yields values or
+ * promises (somewhat similar to C#'s async keyword).
+ *
+ * When called, the coroutine function will start an instance of the generator
+ * and returns a promise that is fulfilled with its final yielded value.
+ *
+ * Control is returned back to the generator when the yielded promise settles.
+ * This can lead to less verbose code when doing lots of sequential async calls
+ * with minimal processing in between.
+ *
+ *     use GuzzleHttp\Promise;
+ *
+ *     function createPromise($value) {
+ *         return new Promise\FulfilledPromise($value);
+ *     }
+ *
+ *     $promise = Promise\coroutine(function () {
+ *         $value = (yield createPromise('a'));
+ *         try {
+ *             $value = (yield createPromise($value . 'b'));
+ *         } catch (\Exception $e) {
+ *             // The promise was rejected.
+ *         }
+ *         yield $value . 'c';
+ *     });
+ *
+ *     // Outputs "abc"
+ *     $promise->then(function ($v) { echo $v; });
+ *
+ * @param callable $generatorFn Generator function to wrap into a promise.
+ *
+ * @return Promise
+ * @link https://github.com/petkaantonov/bluebird/blob/master/API.md#generators inspiration
+ */
+final class Coroutine implements PromiseInterface
+{
+    /**
+     * @var PromiseInterface|null
+     */
+    private $currentPromise;
+
+    /**
+     * @var Generator
+     */
+    private $generator;
+
+    /**
+     * @var Promise
+     */
+    private $result;
+
+    public function __construct(callable $generatorFn)
+    {
+        $this->generator = $generatorFn();
+        $this->result = new Promise(function () {
+            while (isset($this->currentPromise)) {
+                $this->currentPromise->wait();
+            }
+        });
+        $this->nextCoroutine($this->generator->current());
+    }
+
+    public function then(
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    ) {
+        return $this->result->then($onFulfilled, $onRejected);
+    }
+
+    public function otherwise(callable $onRejected)
+    {
+        return $this->result->otherwise($onRejected);
+    }
+
+    public function wait($unwrap = true)
+    {
+        return $this->result->wait($unwrap);
+    }
+
+    public function getState()
+    {
+        return $this->result->getState();
+    }
+
+    public function resolve($value)
+    {
+        $this->result->resolve($value);
+    }
+
+    public function reject($reason)
+    {
+        $this->result->reject($reason);
+    }
+
+    public function cancel()
+    {
+        $this->currentPromise->cancel();
+        $this->result->cancel();
+    }
+
+    private function nextCoroutine($yielded)
+    {
+        $this->currentPromise = promise_for($yielded)
+            ->then([$this, '_handleSuccess'], [$this, '_handleFailure']);
+    }
+
+    /**
+     * @internal
+     */
+    public function _handleSuccess($value)
+    {
+        unset($this->currentPromise);
+        try {
+            $next = $this->generator->send($value);
+            if ($this->generator->valid()) {
+                $this->nextCoroutine($next);
+            } else {
+                $this->result->resolve($value);
+            }
+        } catch (Exception $exception) {
+            $this->result->reject($exception);
+        } catch (Throwable $throwable) {
+            $this->result->reject($throwable);
+        }
+    }
+
+    /**
+     * @internal
+     */
+    public function _handleFailure($reason)
+    {
+        unset($this->currentPromise);
+        try {
+            $nextYield = $this->generator->throw(exception_for($reason));
+            // The throw was caught, so keep iterating on the coroutine
+            $this->nextCoroutine($nextYield);
+        } catch (Exception $exception) {
+            $this->result->reject($exception);
+        } catch (Throwable $throwable) {
+            $this->result->reject($throwable);
+        }
+    }
+}

vendor/guzzlehttp/promises/src/EachPromise.php

@@ -0,0 +1,229 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * Represents a promise that iterates over many promises and invokes
+ * side-effect functions in the process.
+ */
+class EachPromise implements PromisorInterface
+{
+    private $pending = [];
+
+    /** @var \Iterator */
+    private $iterable;
+
+    /** @var callable|int */
+    private $concurrency;
+
+    /** @var callable */
+    private $onFulfilled;
+
+    /** @var callable */
+    private $onRejected;
+
+    /** @var Promise */
+    private $aggregate;
+
+    /** @var bool */
+    private $mutex;
+
+    /**
+     * Configuration hash can include the following key value pairs:
+     *
+     * - fulfilled: (callable) Invoked when a promise fulfills. The function
+     *   is invoked with three arguments: the fulfillment value, the index
+     *   position from the iterable list of the promise, and the aggregate
+     *   promise that manages all of the promises. The aggregate promise may
+     *   be resolved from within the callback to short-circuit the promise.
+     * - rejected: (callable) Invoked when a promise is rejected. The
+     *   function is invoked with three arguments: the rejection reason, the
+     *   index position from the iterable list of the promise, and the
+     *   aggregate promise that manages all of the promises. The aggregate
+     *   promise may be resolved from within the callback to short-circuit
+     *   the promise.
+     * - concurrency: (integer) Pass this configuration option to limit the
+     *   allowed number of outstanding concurrently executing promises,
+     *   creating a capped pool of promises. There is no limit by default.
+     *
+     * @param mixed    $iterable Promises or values to iterate.
+     * @param array    $config   Configuration options
+     */
+    public function __construct($iterable, array $config = [])
+    {
+        $this->iterable = iter_for($iterable);
+
+        if (isset($config['concurrency'])) {
+            $this->concurrency = $config['concurrency'];
+        }
+
+        if (isset($config['fulfilled'])) {
+            $this->onFulfilled = $config['fulfilled'];
+        }
+
+        if (isset($config['rejected'])) {
+            $this->onRejected = $config['rejected'];
+        }
+    }
+
+    public function promise()
+    {
+        if ($this->aggregate) {
+            return $this->aggregate;
+        }
+
+        try {
+            $this->createPromise();
+            $this->iterable->rewind();
+            $this->refillPending();
+        } catch (\Throwable $e) {
+            $this->aggregate->reject($e);
+        } catch (\Exception $e) {
+            $this->aggregate->reject($e);
+        }
+
+        return $this->aggregate;
+    }
+
+    private function createPromise()
+    {
+        $this->mutex = false;
+        $this->aggregate = new Promise(function () {
+            reset($this->pending);
+            if (empty($this->pending) && !$this->iterable->valid()) {
+                $this->aggregate->resolve(null);
+                return;
+            }
+
+            // Consume a potentially fluctuating list of promises while
+            // ensuring that indexes are maintained (precluding array_shift).
+            while ($promise = current($this->pending)) {
+                next($this->pending);
+                $promise->wait();
+                if ($this->aggregate->getState() !== PromiseInterface::PENDING) {
+                    return;
+                }
+            }
+        });
+
+        // Clear the references when the promise is resolved.
+        $clearFn = function () {
+            $this->iterable = $this->concurrency = $this->pending = null;
+            $this->onFulfilled = $this->onRejected = null;
+        };
+
+        $this->aggregate->then($clearFn, $clearFn);
+    }
+
+    private function refillPending()
+    {
+        if (!$this->concurrency) {
+            // Add all pending promises.
+            while ($this->addPending() && $this->advanceIterator());
+            return;
+        }
+
+        // Add only up to N pending promises.
+        $concurrency = is_callable($this->concurrency)
+            ? call_user_func($this->concurrency, count($this->pending))
+            : $this->concurrency;
+        $concurrency = max($concurrency - count($this->pending), 0);
+        // Concurrency may be set to 0 to disallow new promises.
+        if (!$concurrency) {
+            return;
+        }
+        // Add the first pending promise.
+        $this->addPending();
+        // Note this is special handling for concurrency=1 so that we do
+        // not advance the iterator after adding the first promise. This
+        // helps work around issues with generators that might not have the
+        // next value to yield until promise callbacks are called.
+        while (--$concurrency
+            && $this->advanceIterator()
+            && $this->addPending());
+    }
+
+    private function addPending()
+    {
+        if (!$this->iterable || !$this->iterable->valid()) {
+            return false;
+        }
+
+        $promise = promise_for($this->iterable->current());
+        $idx = $this->iterable->key();
+
+        $this->pending[$idx] = $promise->then(
+            function ($value) use ($idx) {
+                if ($this->onFulfilled) {
+                    call_user_func(
+                        $this->onFulfilled, $value, $idx, $this->aggregate
+                    );
+                }
+                $this->step($idx);
+            },
+            function ($reason) use ($idx) {
+                if ($this->onRejected) {
+                    call_user_func(
+                        $this->onRejected, $reason, $idx, $this->aggregate
+                    );
+                }
+                $this->step($idx);
+            }
+        );
+
+        return true;
+    }
+
+    private function advanceIterator()
+    {
+        // Place a lock on the iterator so that we ensure to not recurse,
+        // preventing fatal generator errors.
+        if ($this->mutex) {
+            return false;
+        }
+
+        $this->mutex = true;
+
+        try {
+            $this->iterable->next();
+            $this->mutex = false;
+            return true;
+        } catch (\Throwable $e) {
+            $this->aggregate->reject($e);
+            $this->mutex = false;
+            return false;
+        } catch (\Exception $e) {
+            $this->aggregate->reject($e);
+            $this->mutex = false;
+            return false;
+        }
+    }
+
+    private function step($idx)
+    {
+        // If the promise was already resolved, then ignore this step.
+        if ($this->aggregate->getState() !== PromiseInterface::PENDING) {
+            return;
+        }
+
+        unset($this->pending[$idx]);
+
+        // Only refill pending promises if we are not locked, preventing the
+        // EachPromise to recursively invoke the provided iterator, which
+        // cause a fatal error: "Cannot resume an already running generator"
+        if ($this->advanceIterator() && !$this->checkIfFinished()) {
+            // Add more pending promises if possible.
+            $this->refillPending();
+        }
+    }
+
+    private function checkIfFinished()
+    {
+        if (!$this->pending && !$this->iterable->valid()) {
+            // Resolve the promise if there's nothing left to do.
+            $this->aggregate->resolve(null);
+            return true;
+        }
+
+        return false;
+    }
+}

vendor/guzzlehttp/promises/src/FulfilledPromise.php

@@ -0,0 +1,82 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * A promise that has been fulfilled.
+ *
+ * Thenning off of this promise will invoke the onFulfilled callback
+ * immediately and ignore other callbacks.
+ */
+class FulfilledPromise implements PromiseInterface
+{
+    private $value;
+
+    public function __construct($value)
+    {
+        if (method_exists($value, 'then')) {
+            throw new \InvalidArgumentException(
+                'You cannot create a FulfilledPromise with a promise.');
+        }
+
+        $this->value = $value;
+    }
+
+    public function then(
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    ) {
+        // Return itself if there is no onFulfilled function.
+        if (!$onFulfilled) {
+            return $this;
+        }
+
+        $queue = queue();
+        $p = new Promise([$queue, 'run']);
+        $value = $this->value;
+        $queue->add(static function () use ($p, $value, $onFulfilled) {
+            if ($p->getState() === self::PENDING) {
+                try {
+                    $p->resolve($onFulfilled($value));
+                } catch (\Throwable $e) {
+                    $p->reject($e);
+                } catch (\Exception $e) {
+                    $p->reject($e);
+                }
+            }
+        });
+
+        return $p;
+    }
+
+    public function otherwise(callable $onRejected)
+    {
+        return $this->then(null, $onRejected);
+    }
+
+    public function wait($unwrap = true, $defaultDelivery = null)
+    {
+        return $unwrap ? $this->value : null;
+    }
+
+    public function getState()
+    {
+        return self::FULFILLED;
+    }
+
+    public function resolve($value)
+    {
+        if ($value !== $this->value) {
+            throw new \LogicException("Cannot resolve a fulfilled promise");
+        }
+    }
+
+    public function reject($reason)
+    {
+        throw new \LogicException("Cannot reject a fulfilled promise");
+    }
+
+    public function cancel()
+    {
+        // pass
+    }
+}

vendor/guzzlehttp/promises/src/Promise.php

@@ -0,0 +1,280 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * Promises/A+ implementation that avoids recursion when possible.
+ *
+ * @link https://promisesaplus.com/
+ */
+class Promise implements PromiseInterface
+{
+    private $state = self::PENDING;
+    private $result;
+    private $cancelFn;
+    private $waitFn;
+    private $waitList;
+    private $handlers = [];
+
+    /**
+     * @param callable $waitFn   Fn that when invoked resolves the promise.
+     * @param callable $cancelFn Fn that when invoked cancels the promise.
+     */
+    public function __construct(
+        callable $waitFn = null,
+        callable $cancelFn = null
+    ) {
+        $this->waitFn = $waitFn;
+        $this->cancelFn = $cancelFn;
+    }
+
+    public function then(
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    ) {
+        if ($this->state === self::PENDING) {
+            $p = new Promise(null, [$this, 'cancel']);
+            $this->handlers[] = [$p, $onFulfilled, $onRejected];
+            $p->waitList = $this->waitList;
+            $p->waitList[] = $this;
+            return $p;
+        }
+
+        // Return a fulfilled promise and immediately invoke any callbacks.
+        if ($this->state === self::FULFILLED) {
+            return $onFulfilled
+                ? promise_for($this->result)->then($onFulfilled)
+                : promise_for($this->result);
+        }
+
+        // It's either cancelled or rejected, so return a rejected promise
+        // and immediately invoke any callbacks.
+        $rejection = rejection_for($this->result);
+        return $onRejected ? $rejection->then(null, $onRejected) : $rejection;
+    }
+
+    public function otherwise(callable $onRejected)
+    {
+        return $this->then(null, $onRejected);
+    }
+
+    public function wait($unwrap = true)
+    {
+        $this->waitIfPending();
+
+        $inner = $this->result instanceof PromiseInterface
+            ? $this->result->wait($unwrap)
+            : $this->result;
+
+        if ($unwrap) {
+            if ($this->result instanceof PromiseInterface
+                || $this->state === self::FULFILLED
+            ) {
+                return $inner;
+            } else {
+                // It's rejected so "unwrap" and throw an exception.
+                throw exception_for($inner);
+            }
+        }
+    }
+
+    public function getState()
+    {
+        return $this->state;
+    }
+
+    public function cancel()
+    {
+        if ($this->state !== self::PENDING) {
+            return;
+        }
+
+        $this->waitFn = $this->waitList = null;
+
+        if ($this->cancelFn) {
+            $fn = $this->cancelFn;
+            $this->cancelFn = null;
+            try {
+                $fn();
+            } catch (\Throwable $e) {
+                $this->reject($e);
+            } catch (\Exception $e) {
+                $this->reject($e);
+            }
+        }
+
+        // Reject the promise only if it wasn't rejected in a then callback.
+        if ($this->state === self::PENDING) {
+            $this->reject(new CancellationException('Promise has been cancelled'));
+        }
+    }
+
+    public function resolve($value)
+    {
+        $this->settle(self::FULFILLED, $value);
+    }
+
+    public function reject($reason)
+    {
+        $this->settle(self::REJECTED, $reason);
+    }
+
+    private function settle($state, $value)
+    {
+        if ($this->state !== self::PENDING) {
+            // Ignore calls with the same resolution.
+            if ($state === $this->state && $value === $this->result) {
+                return;
+            }
+            throw $this->state === $state
+                ? new \LogicException("The promise is already {$state}.")
+                : new \LogicException("Cannot change a {$this->state} promise to {$state}");
+        }
+
+        if ($value === $this) {
+            throw new \LogicException('Cannot fulfill or reject a promise with itself');
+        }
+
+        // Clear out the state of the promise but stash the handlers.
+        $this->state = $state;
+        $this->result = $value;
+        $handlers = $this->handlers;
+        $this->handlers = null;
+        $this->waitList = $this->waitFn = null;
+        $this->cancelFn = null;
+
+        if (!$handlers) {
+            return;
+        }
+
+        // If the value was not a settled promise or a thenable, then resolve
+        // it in the task queue using the correct ID.
+        if (!method_exists($value, 'then')) {
+            $id = $state === self::FULFILLED ? 1 : 2;
+            // It's a success, so resolve the handlers in the queue.
+            queue()->add(static function () use ($id, $value, $handlers) {
+                foreach ($handlers as $handler) {
+                    self::callHandler($id, $value, $handler);
+                }
+            });
+        } elseif ($value instanceof Promise
+            && $value->getState() === self::PENDING
+        ) {
+            // We can just merge our handlers onto the next promise.
+            $value->handlers = array_merge($value->handlers, $handlers);
+        } else {
+            // Resolve the handlers when the forwarded promise is resolved.
+            $value->then(
+                static function ($value) use ($handlers) {
+                    foreach ($handlers as $handler) {
+                        self::callHandler(1, $value, $handler);
+                    }
+                },
+                static function ($reason) use ($handlers) {
+                    foreach ($handlers as $handler) {
+                        self::callHandler(2, $reason, $handler);
+                    }
+                }
+            );
+        }
+    }
+
+    /**
+     * Call a stack of handlers using a specific callback index and value.
+     *
+     * @param int   $index   1 (resolve) or 2 (reject).
+     * @param mixed $value   Value to pass to the callback.
+     * @param array $handler Array of handler data (promise and callbacks).
+     *
+     * @return array Returns the next group to resolve.
+     */
+    private static function callHandler($index, $value, array $handler)
+    {
+        /** @var PromiseInterface $promise */
+        $promise = $handler[0];
+
+        // The promise may have been cancelled or resolved before placing
+        // this thunk in the queue.
+        if ($promise->getState() !== self::PENDING) {
+            return;
+        }
+
+        try {
+            if (isset($handler[$index])) {
+                $promise->resolve($handler[$index]($value));
+            } elseif ($index === 1) {
+                // Forward resolution values as-is.
+                $promise->resolve($value);
+            } else {
+                // Forward rejections down the chain.
+                $promise->reject($value);
+            }
+        } catch (\Throwable $reason) {
+            $promise->reject($reason);
+        } catch (\Exception $reason) {
+            $promise->reject($reason);
+        }
+    }
+
+    private function waitIfPending()
+    {
+        if ($this->state !== self::PENDING) {
+            return;
+        } elseif ($this->waitFn) {
+            $this->invokeWaitFn();
+        } elseif ($this->waitList) {
+            $this->invokeWaitList();
+        } else {
+            // If there's not wait function, then reject the promise.
+            $this->reject('Cannot wait on a promise that has '
+                . 'no internal wait function. You must provide a wait '
+                . 'function when constructing the promise to be able to '
+                . 'wait on a promise.');
+        }
+
+        queue()->run();
+
+        if ($this->state === self::PENDING) {
+            $this->reject('Invoking the wait callback did not resolve the promise');
+        }
+    }
+
+    private function invokeWaitFn()
+    {
+        try {
+            $wfn = $this->waitFn;
+            $this->waitFn = null;
+            $wfn(true);
+        } catch (\Exception $reason) {
+            if ($this->state === self::PENDING) {
+                // The promise has not been resolved yet, so reject the promise
+                // with the exception.
+                $this->reject($reason);
+            } else {
+                // The promise was already resolved, so there's a problem in
+                // the application.
+                throw $reason;
+            }
+        }
+    }
+
+    private function invokeWaitList()
+    {
+        $waitList = $this->waitList;
+        $this->waitList = null;
+
+        foreach ($waitList as $result) {
+            while (true) {
+                $result->waitIfPending();
+
+                if ($result->result instanceof Promise) {
+                    $result = $result->result;
+                } else {
+                    if ($result->result instanceof PromiseInterface) {
+                        $result->result->wait(false);
+                    }
+                    break;
+                }
+            }
+        }
+    }
+}

vendor/guzzlehttp/promises/src/PromiseInterface.php

@@ -0,0 +1,93 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * A promise represents the eventual result of an asynchronous operation.
+ *
+ * The primary way of interacting with a promise is through its then method,
+ * which registers callbacks to receive either a promise’s eventual value or
+ * the reason why the promise cannot be fulfilled.
+ *
+ * @link https://promisesaplus.com/
+ */
+interface PromiseInterface
+{
+    const PENDING = 'pending';
+    const FULFILLED = 'fulfilled';
+    const REJECTED = 'rejected';
+
+    /**
+     * Appends fulfillment and rejection handlers to the promise, and returns
+     * a new promise resolving to the return value of the called handler.
+     *
+     * @param callable $onFulfilled Invoked when the promise fulfills.
+     * @param callable $onRejected  Invoked when the promise is rejected.
+     *
+     * @return PromiseInterface
+     */
+    public function then(
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    );
+
+    /**
+     * Appends a rejection handler callback to the promise, and returns a new
+     * promise resolving to the return value of the callback if it is called,
+     * or to its original fulfillment value if the promise is instead
+     * fulfilled.
+     *
+     * @param callable $onRejected Invoked when the promise is rejected.
+     *
+     * @return PromiseInterface
+     */
+    public function otherwise(callable $onRejected);
+
+    /**
+     * Get the state of the promise ("pending", "rejected", or "fulfilled").
+     *
+     * The three states can be checked against the constants defined on
+     * PromiseInterface: PENDING, FULFILLED, and REJECTED.
+     *
+     * @return string
+     */
+    public function getState();
+
+    /**
+     * Resolve the promise with the given value.
+     *
+     * @param mixed $value
+     * @throws \RuntimeException if the promise is already resolved.
+     */
+    public function resolve($value);
+
+    /**
+     * Reject the promise with the given reason.
+     *
+     * @param mixed $reason
+     * @throws \RuntimeException if the promise is already resolved.
+     */
+    public function reject($reason);
+
+    /**
+     * Cancels the promise if possible.
+     *
+     * @link https://github.com/promises-aplus/cancellation-spec/issues/7
+     */
+    public function cancel();
+
+    /**
+     * Waits until the promise completes if possible.
+     *
+     * Pass $unwrap as true to unwrap the result of the promise, either
+     * returning the resolved value or throwing the rejected exception.
+     *
+     * If the promise cannot be waited on, then the promise will be rejected.
+     *
+     * @param bool $unwrap
+     *
+     * @return mixed
+     * @throws \LogicException if the promise has no wait function or if the
+     *                         promise does not settle after waiting.
+     */
+    public function wait($unwrap = true);
+}

vendor/guzzlehttp/promises/src/PromisorInterface.php

@@ -0,0 +1,15 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * Interface used with classes that return a promise.
+ */
+interface PromisorInterface
+{
+    /**
+     * Returns a promise.
+     *
+     * @return PromiseInterface
+     */
+    public function promise();
+}

vendor/guzzlehttp/promises/src/RejectedPromise.php

@@ -0,0 +1,87 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * A promise that has been rejected.
+ *
+ * Thenning off of this promise will invoke the onRejected callback
+ * immediately and ignore other callbacks.
+ */
+class RejectedPromise implements PromiseInterface
+{
+    private $reason;
+
+    public function __construct($reason)
+    {
+        if (method_exists($reason, 'then')) {
+            throw new \InvalidArgumentException(
+                'You cannot create a RejectedPromise with a promise.');
+        }
+
+        $this->reason = $reason;
+    }
+
+    public function then(
+        callable $onFulfilled = null,
+        callable $onRejected = null
+    ) {
+        // If there's no onRejected callback then just return self.
+        if (!$onRejected) {
+            return $this;
+        }
+
+        $queue = queue();
+        $reason = $this->reason;
+        $p = new Promise([$queue, 'run']);
+        $queue->add(static function () use ($p, $reason, $onRejected) {
+            if ($p->getState() === self::PENDING) {
+                try {
+                    // Return a resolved promise if onRejected does not throw.
+                    $p->resolve($onRejected($reason));
+                } catch (\Throwable $e) {
+                    // onRejected threw, so return a rejected promise.
+                    $p->reject($e);
+                } catch (\Exception $e) {
+                    // onRejected threw, so return a rejected promise.
+                    $p->reject($e);
+                }
+            }
+        });
+
+        return $p;
+    }
+
+    public function otherwise(callable $onRejected)
+    {
+        return $this->then(null, $onRejected);
+    }
+
+    public function wait($unwrap = true, $defaultDelivery = null)
+    {
+        if ($unwrap) {
+            throw exception_for($this->reason);
+        }
+    }
+
+    public function getState()
+    {
+        return self::REJECTED;
+    }
+
+    public function resolve($value)
+    {
+        throw new \LogicException("Cannot resolve a rejected promise");
+    }
+
+    public function reject($reason)
+    {
+        if ($reason !== $this->reason) {
+            throw new \LogicException("Cannot reject a rejected promise");
+        }
+    }
+
+    public function cancel()
+    {
+        // pass
+    }
+}

vendor/guzzlehttp/promises/src/RejectionException.php

@@ -0,0 +1,47 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * A special exception that is thrown when waiting on a rejected promise.
+ *
+ * The reason value is available via the getReason() method.
+ */
+class RejectionException extends \RuntimeException
+{
+    /** @var mixed Rejection reason. */
+    private $reason;
+
+    /**
+     * @param mixed $reason       Rejection reason.
+     * @param string $description Optional description
+     */
+    public function __construct($reason, $description = null)
+    {
+        $this->reason = $reason;
+
+        $message = 'The promise was rejected';
+
+        if ($description) {
+            $message .= ' with reason: ' . $description;
+        } elseif (is_string($reason)
+            || (is_object($reason) && method_exists($reason, '__toString'))
+        ) {
+            $message .= ' with reason: ' . $this->reason;
+        } elseif ($reason instanceof \JsonSerializable) {
+            $message .= ' with reason: '
+                . json_encode($this->reason, JSON_PRETTY_PRINT);
+        }
+
+        parent::__construct($message);
+    }
+
+    /**
+     * Returns the rejection reason.
+     *
+     * @return mixed
+     */
+    public function getReason()
+    {
+        return $this->reason;
+    }
+}

vendor/guzzlehttp/promises/src/TaskQueue.php

@@ -0,0 +1,66 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * A task queue that executes tasks in a FIFO order.
+ *
+ * This task queue class is used to settle promises asynchronously and
+ * maintains a constant stack size. You can use the task queue asynchronously
+ * by calling the `run()` function of the global task queue in an event loop.
+ *
+ *     GuzzleHttp\Promise\queue()->run();
+ */
+class TaskQueue implements TaskQueueInterface
+{
+    private $enableShutdown = true;
+    private $queue = [];
+
+    public function __construct($withShutdown = true)
+    {
+        if ($withShutdown) {
+            register_shutdown_function(function () {
+                if ($this->enableShutdown) {
+                    // Only run the tasks if an E_ERROR didn't occur.
+                    $err = error_get_last();
+                    if (!$err || ($err['type'] ^ E_ERROR)) {
+                        $this->run();
+                    }
+                }
+            });
+        }
+    }
+
+    public function isEmpty()
+    {
+        return !$this->queue;
+    }
+
+    public function add(callable $task)
+    {
+        $this->queue[] = $task;
+    }
+
+    public function run()
+    {
+        /** @var callable $task */
+        while ($task = array_shift($this->queue)) {
+            $task();
+        }
+    }
+
+    /**
+     * The task queue will be run and exhausted by default when the process
+     * exits IFF the exit is not the result of a PHP E_ERROR error.
+     *
+     * You can disable running the automatic shutdown of the queue by calling
+     * this function. If you disable the task queue shutdown process, then you
+     * MUST either run the task queue (as a result of running your event loop
+     * or manually using the run() method) or wait on each outstanding promise.
+     *
+     * Note: This shutdown will occur before any destructors are triggered.
+     */
+    public function disableShutdown()
+    {
+        $this->enableShutdown = false;
+    }
+}

vendor/guzzlehttp/promises/src/TaskQueueInterface.php

@@ -0,0 +1,25 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+interface TaskQueueInterface
+{
+    /**
+     * Returns true if the queue is empty.
+     *
+     * @return bool
+     */
+    public function isEmpty();
+
+    /**
+     * Adds a task to the queue that will be executed the next time run is
+     * called.
+     *
+     * @param callable $task
+     */
+    public function add(callable $task);
+
+    /**
+     * Execute all of the pending task in the queue.
+     */
+    public function run();
+}

vendor/guzzlehttp/promises/src/functions.php

@@ -0,0 +1,457 @@
+<?php
+namespace GuzzleHttp\Promise;
+
+/**
+ * Get the global task queue used for promise resolution.
+ *
+ * This task queue MUST be run in an event loop in order for promises to be
+ * settled asynchronously. It will be automatically run when synchronously
+ * waiting on a promise.
+ *
+ * <code>
+ * while ($eventLoop->isRunning()) {
+ *     GuzzleHttp\Promise\queue()->run();
+ * }
+ * </code>
+ *
+ * @param TaskQueueInterface $assign Optionally specify a new queue instance.
+ *
+ * @return TaskQueueInterface
+ */
+function queue(TaskQueueInterface $assign = null)
+{
+    static $queue;
+
+    if ($assign) {
+        $queue = $assign;
+    } elseif (!$queue) {
+        $queue = new TaskQueue();
+    }
+
+    return $queue;
+}
+
+/**
+ * Adds a function to run in the task queue when it is next `run()` and returns
+ * a promise that is fulfilled or rejected with the result.
+ *
+ * @param callable $task Task function to run.
+ *
+ * @return PromiseInterface
+ */
+function task(callable $task)
+{
+    $queue = queue();
+    $promise = new Promise([$queue, 'run']);
+    $queue->add(function () use ($task, $promise) {
+        try {
+            $promise->resolve($task());
+        } catch (\Throwable $e) {
+            $promise->reject($e);
+        } catch (\Exception $e) {
+            $promise->reject($e);
+        }
+    });
+
+    return $promise;
+}
+
+/**
+ * Creates a promise for a value if the value is not a promise.
+ *
+ * @param mixed $value Promise or value.
+ *
+ * @return PromiseInterface
+ */
+function promise_for($value)
+{
+    if ($value instanceof PromiseInterface) {
+        return $value;
+    }
+
+    // Return a Guzzle promise that shadows the given promise.
+    if (method_exists($value, 'then')) {
+        $wfn = method_exists($value, 'wait') ? [$value, 'wait'] : null;
+        $cfn = method_exists($value, 'cancel') ? [$value, 'cancel'] : null;
+        $promise = new Promise($wfn, $cfn);
+        $value->then([$promise, 'resolve'], [$promise, 'reject']);
+        return $promise;
+    }
+
+    return new FulfilledPromise($value);
+}
+
+/**
+ * Creates a rejected promise for a reason if the reason is not a promise. If
+ * the provided reason is a promise, then it is returned as-is.
+ *
+ * @param mixed $reason Promise or reason.
+ *
+ * @return PromiseInterface
+ */
+function rejection_for($reason)
+{
+    if ($reason instanceof PromiseInterface) {
+        return $reason;
+    }
+
+    return new RejectedPromise($reason);
+}
+
+/**
+ * Create an exception for a rejected promise value.
+ *
+ * @param mixed $reason
+ *
+ * @return \Exception|\Throwable
+ */
+function exception_for($reason)
+{
+    return $reason instanceof \Exception || $reason instanceof \Throwable
+        ? $reason
+        : new RejectionException($reason);
+}
+
+/**
+ * Returns an iterator for the given value.
+ *
+ * @param mixed $value
+ *
+ * @return \Iterator
+ */
+function iter_for($value)
+{
+    if ($value instanceof \Iterator) {
+        return $value;
+    } elseif (is_array($value)) {
+        return new \ArrayIterator($value);
+    } else {
+        return new \ArrayIterator([$value]);
+    }
+}
+
+/**
+ * Synchronously waits on a promise to resolve and returns an inspection state
+ * array.
+ *
+ * Returns a state associative array containing a "state" key mapping to a
+ * valid promise state. If the state of the promise is "fulfilled", the array
+ * will contain a "value" key mapping to the fulfilled value of the promise. If
+ * the promise is rejected, the array will contain a "reason" key mapping to
+ * the rejection reason of the promise.
+ *
+ * @param PromiseInterface $promise Promise or value.
+ *
+ * @return array
+ */
+function inspect(PromiseInterface $promise)
+{
+    try {
+        return [
+            'state' => PromiseInterface::FULFILLED,
+            'value' => $promise->wait()
+        ];
+    } catch (RejectionException $e) {
+        return ['state' => PromiseInterface::REJECTED, 'reason' => $e->getReason()];
+    } catch (\Throwable $e) {
+        return ['state' => PromiseInterface::REJECTED, 'reason' => $e];
+    } catch (\Exception $e) {
+        return ['state' => PromiseInterface::REJECTED, 'reason' => $e];
+    }
+}
+
+/**
+ * Waits on all of the provided promises, but does not unwrap rejected promises
+ * as thrown exception.
+ *
+ * Returns an array of inspection state arrays.
+ *
+ * @param PromiseInterface[] $promises Traversable of promises to wait upon.
+ *
+ * @return array
+ * @see GuzzleHttp\Promise\inspect for the inspection state array format.
+ */
+function inspect_all($promises)
+{
+    $results = [];
+    foreach ($promises as $key => $promise) {
+        $results[$key] = inspect($promise);
+    }
+
+    return $results;
+}
+
+/**
+ * Waits on all of the provided promises and returns the fulfilled values.
+ *
+ * Returns an array that contains the value of each promise (in the same order
+ * the promises were provided). An exception is thrown if any of the promises
+ * are rejected.
+ *
+ * @param mixed $promises Iterable of PromiseInterface objects to wait on.
+ *
+ * @return array
+ * @throws \Exception on error
+ * @throws \Throwable on error in PHP >=7
+ */
+function unwrap($promises)
+{
+    $results = [];
+    foreach ($promises as $key => $promise) {
+        $results[$key] = $promise->wait();
+    }
+
+    return $results;
+}
+
+/**
+ * Given an array of promises, return a promise that is fulfilled when all the
+ * items in the array are fulfilled.
+ *
+ * The promise's fulfillment value is an array with fulfillment values at
+ * respective positions to the original array. If any promise in the array
+ * rejects, the returned promise is rejected with the rejection reason.
+ *
+ * @param mixed $promises Promises or values.
+ *
+ * @return PromiseInterface
+ */
+function all($promises)
+{
+    $results = [];
+    return each(
+        $promises,
+        function ($value, $idx) use (&$results) {
+            $results[$idx] = $value;
+        },
+        function ($reason, $idx, Promise $aggregate) {
+            $aggregate->reject($reason);
+        }
+    )->then(function () use (&$results) {
+        ksort($results);
+        return $results;
+    });
+}
+
+/**
+ * Initiate a competitive race between multiple promises or values (values will
+ * become immediately fulfilled promises).
+ *
+ * When count amount of promises have been fulfilled, the returned promise is
+ * fulfilled with an array that contains the fulfillment values of the winners
+ * in order of resolution.
+ *
+ * This prommise is rejected with a {@see GuzzleHttp\Promise\AggregateException}
+ * if the number of fulfilled promises is less than the desired $count.
+ *
+ * @param int   $count    Total number of promises.
+ * @param mixed $promises Promises or values.
+ *
+ * @return PromiseInterface
+ */
+function some($count, $promises)
+{
+    $results = [];
+    $rejections = [];
+
+    return each(
+        $promises,
+        function ($value, $idx, PromiseInterface $p) use (&$results, $count) {
+            if ($p->getState() !== PromiseInterface::PENDING) {
+                return;
+            }
+            $results[$idx] = $value;
+            if (count($results) >= $count) {
+                $p->resolve(null);
+            }
+        },
+        function ($reason) use (&$rejections) {
+            $rejections[] = $reason;
+        }
+    )->then(
+        function () use (&$results, &$rejections, $count) {
+            if (count($results) !== $count) {
+                throw new AggregateException(
+                    'Not enough promises to fulfill count',
+                    $rejections
+                );
+            }
+            ksort($results);
+            return array_values($results);
+        }
+    );
+}
+
+/**
+ * Like some(), with 1 as count. However, if the promise fulfills, the
+ * fulfillment value is not an array of 1 but the value directly.
+ *
+ * @param mixed $promises Promises or values.
+ *
+ * @return PromiseInterface
+ */
+function any($promises)
+{
+    return some(1, $promises)->then(function ($values) { return $values[0]; });
+}
+
+/**
+ * Returns a promise that is fulfilled when all of the provided promises have
+ * been fulfilled or rejected.
+ *
+ * The returned promise is fulfilled with an array of inspection state arrays.
+ *
+ * @param mixed $promises Promises or values.
+ *
+ * @return PromiseInterface
+ * @see GuzzleHttp\Promise\inspect for the inspection state array format.
+ */
+function settle($promises)
+{
+    $results = [];
+
+    return each(
+        $promises,
+        function ($value, $idx) use (&$results) {
+            $results[$idx] = ['state' => PromiseInterface::FULFILLED, 'value' => $value];
+        },
+        function ($reason, $idx) use (&$results) {
+            $results[$idx] = ['state' => PromiseInterface::REJECTED, 'reason' => $reason];
+        }
+    )->then(function () use (&$results) {
+        ksort($results);
+        return $results;
+    });
+}
+
+/**
+ * Given an iterator that yields promises or values, returns a promise that is
+ * fulfilled with a null value when the iterator has been consumed or the
+ * aggregate promise has been fulfilled or rejected.
+ *
+ * $onFulfilled is a function that accepts the fulfilled value, iterator
+ * index, and the aggregate promise. The callback can invoke any necessary side
+ * effects and choose to resolve or reject the aggregate promise if needed.
+ *
+ * $onRejected is a function that accepts the rejection reason, iterator
+ * index, and the aggregate promise. The callback can invoke any necessary side
+ * effects and choose to resolve or reject the aggregate promise if needed.
+ *
+ * @param mixed    $iterable    Iterator or array to iterate over.
+ * @param callable $onFulfilled
+ * @param callable $onRejected
+ *
+ * @return PromiseInterface
+ */
+function each(
+    $iterable,
+    callable $onFulfilled = null,
+    callable $onRejected = null
+) {
+    return (new EachPromise($iterable, [
+        'fulfilled' => $onFulfilled,
+        'rejected'  => $onRejected
+    ]))->promise();
+}
+
+/**
+ * Like each, but only allows a certain number of outstanding promises at any
+ * given time.
+ *
+ * $concurrency may be an integer or a function that accepts the number of
+ * pending promises and returns a numeric concurrency limit value to allow for
+ * dynamic a concurrency size.
+ *
+ * @param mixed        $iterable
+ * @param int|callable $concurrency
+ * @param callable     $onFulfilled
+ * @param callable     $onRejected
+ *
+ * @return PromiseInterface
+ */
+function each_limit(
+    $iterable,
+    $concurrency,
+    callable $onFulfilled = null,
+    callable $onRejected = null
+) {
+    return (new EachPromise($iterable, [
+        'fulfilled'   => $onFulfilled,
+        'rejected'    => $onRejected,
+        'concurrency' => $concurrency
+    ]))->promise();
+}
+
+/**
+ * Like each_limit, but ensures that no promise in the given $iterable argument
+ * is rejected. If any promise is rejected, then the aggregate promise is
+ * rejected with the encountered rejection.
+ *
+ * @param mixed        $iterable
+ * @param int|callable $concurrency
+ * @param callable     $onFulfilled
+ *
+ * @return PromiseInterface
+ */
+function each_limit_all(
+    $iterable,
+    $concurrency,
+    callable $onFulfilled = null
+) {
+    return each_limit(
+        $iterable,
+        $concurrency,
+        $onFulfilled,
+        function ($reason, $idx, PromiseInterface $aggregate) {
+            $aggregate->reject($reason);
+        }
+    );
+}
+
+/**
+ * Returns true if a promise is fulfilled.
+ *
+ * @param PromiseInterface $promise
+ *
+ * @return bool
+ */
+function is_fulfilled(PromiseInterface $promise)
+{
+    return $promise->getState() === PromiseInterface::FULFILLED;
+}
+
+/**
+ * Returns true if a promise is rejected.
+ *
+ * @param PromiseInterface $promise
+ *
+ * @return bool
+ */
+function is_rejected(PromiseInterface $promise)
+{
+    return $promise->getState() === PromiseInterface::REJECTED;
+}
+
+/**
+ * Returns true if a promise is fulfilled or rejected.
+ *
+ * @param PromiseInterface $promise
+ *
+ * @return bool
+ */
+function is_settled(PromiseInterface $promise)
+{
+    return $promise->getState() !== PromiseInterface::PENDING;
+}
+
+/**
+ * @see Coroutine
+ *
+ * @param callable $generatorFn
+ *
+ * @return PromiseInterface
+ */
+function coroutine(callable $generatorFn)
+{
+    return new Coroutine($generatorFn);
+}