forked from GNUsocial/gnu-social
814 lines
23 KiB
PHP
814 lines
23 KiB
PHP
<?php
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// +-----------------------------------------------------------------------+
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// | Copyright (c) 2007-2008, Christian Schmidt, Peytz & Co. A/S |
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// | All rights reserved. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | o Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | o Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution.|
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// | o The names of the authors may not be used to endorse or promote |
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// | products derived from this software without specific prior written |
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// | permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// | |
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// +-----------------------------------------------------------------------+
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// | Author: Christian Schmidt <schmidt at php dot net> |
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// +-----------------------------------------------------------------------+
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//
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// $Id: URL2.php,v 1.10 2008/04/26 21:57:08 schmidt Exp $
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//
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// Net_URL2 Class (PHP5 Only)
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// This code is released under the BSD License - http://www.opensource.org/licenses/bsd-license.php
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/**
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* @license BSD License
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*/
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class Net_URL2
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{
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/**
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* Do strict parsing in resolve() (see RFC 3986, section 5.2.2). Default
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* is true.
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*/
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const OPTION_STRICT = 'strict';
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/**
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* Represent arrays in query using PHP's [] notation. Default is true.
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*/
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const OPTION_USE_BRACKETS = 'use_brackets';
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/**
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* URL-encode query variable keys. Default is true.
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*/
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const OPTION_ENCODE_KEYS = 'encode_keys';
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/**
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* Query variable separators when parsing the query string. Every character
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* is considered a separator. Default is specified by the
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* arg_separator.input php.ini setting (this defaults to "&").
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*/
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const OPTION_SEPARATOR_INPUT = 'input_separator';
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/**
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* Query variable separator used when generating the query string. Default
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* is specified by the arg_separator.output php.ini setting (this defaults
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* to "&").
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*/
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const OPTION_SEPARATOR_OUTPUT = 'output_separator';
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/**
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* Default options corresponds to how PHP handles $_GET.
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*/
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private $options = array(
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self::OPTION_STRICT => true,
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self::OPTION_USE_BRACKETS => true,
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self::OPTION_ENCODE_KEYS => true,
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self::OPTION_SEPARATOR_INPUT => 'x&',
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self::OPTION_SEPARATOR_OUTPUT => 'x&',
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);
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/**
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* @var string|bool
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*/
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private $scheme = false;
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/**
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* @var string|bool
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*/
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private $userinfo = false;
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/**
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* @var string|bool
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*/
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private $host = false;
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/**
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* @var int|bool
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*/
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private $port = false;
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/**
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* @var string
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*/
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private $path = '';
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/**
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* @var string|bool
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*/
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private $query = false;
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/**
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* @var string|bool
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*/
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private $fragment = false;
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/**
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* @param string $url an absolute or relative URL
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* @param array $options
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*/
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public function __construct($url, $options = null)
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{
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$this->setOption(self::OPTION_SEPARATOR_INPUT,
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ini_get('arg_separator.input'));
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$this->setOption(self::OPTION_SEPARATOR_OUTPUT,
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ini_get('arg_separator.output'));
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if (is_array($options)) {
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foreach ($options as $optionName => $value) {
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$this->setOption($optionName);
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}
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}
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if (preg_match('@^([a-z][a-z0-9.+-]*):@i', $url, $reg)) {
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$this->scheme = $reg[1];
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$url = substr($url, strlen($reg[0]));
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}
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if (preg_match('@^//([^/#?]+)@', $url, $reg)) {
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$this->setAuthority($reg[1]);
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$url = substr($url, strlen($reg[0]));
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}
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$i = strcspn($url, '?#');
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$this->path = substr($url, 0, $i);
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$url = substr($url, $i);
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if (preg_match('@^\?([^#]*)@', $url, $reg)) {
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$this->query = $reg[1];
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$url = substr($url, strlen($reg[0]));
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}
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if ($url) {
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$this->fragment = substr($url, 1);
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}
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}
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/**
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* Returns the scheme, e.g. "http" or "urn", or false if there is no
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* scheme specified, i.e. if this is a relative URL.
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*
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* @return string|bool
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*/
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public function getScheme()
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{
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return $this->scheme;
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}
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/**
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* @param string|bool $scheme
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*
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* @return void
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* @see getScheme()
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*/
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public function setScheme($scheme)
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{
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$this->scheme = $scheme;
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}
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/**
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* Returns the user part of the userinfo part (the part preceding the first
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* ":"), or false if there is no userinfo part.
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*
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* @return string|bool
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*/
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public function getUser()
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{
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return $this->userinfo !== false ? preg_replace('@:.*$@', '', $this->userinfo) : false;
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}
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/**
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* Returns the password part of the userinfo part (the part after the first
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* ":"), or false if there is no userinfo part (i.e. the URL does not
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* contain "@" in front of the hostname) or the userinfo part does not
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* contain ":".
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*
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* @return string|bool
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*/
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public function getPassword()
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{
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return $this->userinfo !== false ? substr(strstr($this->userinfo, ':'), 1) : false;
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}
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/**
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* Returns the userinfo part, or false if there is none, i.e. if the
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* authority part does not contain "@".
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*
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* @return string|bool
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*/
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public function getUserinfo()
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{
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return $this->userinfo;
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}
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/**
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* Sets the userinfo part. If two arguments are passed, they are combined
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* in the userinfo part as username ":" password.
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*
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* @param string|bool $userinfo userinfo or username
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* @param string|bool $password
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*
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* @return void
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*/
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public function setUserinfo($userinfo, $password = false)
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{
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$this->userinfo = $userinfo;
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if ($password !== false) {
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$this->userinfo .= ':' . $password;
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}
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}
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/**
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* Returns the host part, or false if there is no authority part, e.g.
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* relative URLs.
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*
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* @return string|bool
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*/
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public function getHost()
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{
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return $this->host;
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}
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/**
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* @param string|bool $host
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*
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* @return void
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*/
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public function setHost($host)
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{
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$this->host = $host;
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}
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/**
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* Returns the port number, or false if there is no port number specified,
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* i.e. if the default port is to be used.
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*
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* @return int|bool
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*/
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public function getPort()
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{
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return $this->port;
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}
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/**
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* @param int|bool $port
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*
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* @return void
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*/
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public function setPort($port)
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{
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$this->port = intval($port);
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}
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/**
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* Returns the authority part, i.e. [ userinfo "@" ] host [ ":" port ], or
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* false if there is no authority none.
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*
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* @return string|bool
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*/
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public function getAuthority()
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{
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if (!$this->host) {
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return false;
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}
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$authority = '';
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if ($this->userinfo !== false) {
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$authority .= $this->userinfo . '@';
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}
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$authority .= $this->host;
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if ($this->port !== false) {
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$authority .= ':' . $this->port;
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}
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return $authority;
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}
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/**
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* @param string|false $authority
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*
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* @return void
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*/
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public function setAuthority($authority)
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{
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$this->user = false;
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$this->pass = false;
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$this->host = false;
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$this->port = false;
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if (preg_match('@^(([^\@]+)\@)?([^:]+)(:(\d*))?$@', $authority, $reg)) {
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if ($reg[1]) {
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$this->userinfo = $reg[2];
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}
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$this->host = $reg[3];
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if (isset($reg[5])) {
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$this->port = intval($reg[5]);
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}
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}
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}
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/**
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* Returns the path part (possibly an empty string).
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*
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* @return string
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*/
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public function getPath()
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{
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return $this->path;
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}
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/**
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* @param string $path
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*
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* @return void
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*/
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public function setPath($path)
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{
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$this->path = $path;
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}
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/**
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* Returns the query string (excluding the leading "?"), or false if "?"
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* isn't present in the URL.
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*
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* @return string|bool
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* @see self::getQueryVariables()
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*/
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public function getQuery()
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{
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return $this->query;
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}
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/**
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* @param string|bool $query
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*
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* @return void
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* @see self::setQueryVariables()
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*/
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public function setQuery($query)
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{
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$this->query = $query;
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}
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/**
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* Returns the fragment name, or false if "#" isn't present in the URL.
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*
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* @return string|bool
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*/
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public function getFragment()
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{
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return $this->fragment;
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}
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/**
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* @param string|bool $fragment
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*
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* @return void
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*/
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public function setFragment($fragment)
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{
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$this->fragment = $fragment;
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}
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/**
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* Returns the query string like an array as the variables would appear in
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* $_GET in a PHP script.
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*
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* @return array
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*/
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public function getQueryVariables()
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{
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$pattern = '/[' .
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preg_quote($this->getOption(self::OPTION_SEPARATOR_INPUT), '/') .
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']/';
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$parts = preg_split($pattern, $this->query, -1, PREG_SPLIT_NO_EMPTY);
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$return = array();
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foreach ($parts as $part) {
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if (strpos($part, '=') !== false) {
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list($key, $value) = explode('=', $part, 2);
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} else {
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$key = $part;
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$value = null;
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}
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if ($this->getOption(self::OPTION_ENCODE_KEYS)) {
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$key = rawurldecode($key);
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}
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$value = rawurldecode($value);
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if ($this->getOption(self::OPTION_USE_BRACKETS) &&
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preg_match('#^(.*)\[([0-9a-z_-]*)\]#i', $key, $matches)) {
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$key = $matches[1];
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$idx = $matches[2];
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// Ensure is an array
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if (empty($return[$key]) || !is_array($return[$key])) {
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$return[$key] = array();
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}
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// Add data
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if ($idx === '') {
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$return[$key][] = $value;
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} else {
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$return[$key][$idx] = $value;
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}
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} elseif (!$this->getOption(self::OPTION_USE_BRACKETS)
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&& !empty($return[$key])
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) {
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$return[$key] = (array) $return[$key];
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$return[$key][] = $value;
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} else {
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$return[$key] = $value;
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}
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}
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return $return;
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}
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/**
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* @param array $array (name => value) array
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*
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* @return void
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*/
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public function setQueryVariables(array $array)
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{
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if (!$array) {
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$this->query = false;
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} else {
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foreach ($array as $name => $value) {
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if ($this->getOption(self::OPTION_ENCODE_KEYS)) {
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$name = rawurlencode($name);
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}
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if (is_array($value)) {
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foreach ($value as $k => $v) {
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$parts[] = $this->getOption(self::OPTION_USE_BRACKETS)
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? sprintf('%s[%s]=%s', $name, $k, $v)
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: ($name . '=' . $v);
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}
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} elseif (!is_null($value)) {
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$parts[] = $name . '=' . $value;
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} else {
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$parts[] = $name;
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}
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}
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$this->query = implode($this->getOption(self::OPTION_SEPARATOR_OUTPUT),
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$parts);
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}
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}
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/**
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* @param string $name
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* @param mixed $value
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*
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* @return array
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*/
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public function setQueryVariable($name, $value)
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{
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$array = $this->getQueryVariables();
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$array[$name] = $value;
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$this->setQueryVariables($array);
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}
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/**
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* @param string $name
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*
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* @return void
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*/
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public function unsetQueryVariable($name)
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{
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$array = $this->getQueryVariables();
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unset($array[$name]);
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$this->setQueryVariables($array);
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}
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/**
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* Returns a string representation of this URL.
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*
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* @return string
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*/
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public function getURL()
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{
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// See RFC 3986, section 5.3
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$url = "";
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if ($this->scheme !== false) {
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$url .= $this->scheme . ':';
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}
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$authority = $this->getAuthority();
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if ($authority !== false) {
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$url .= '//' . $authority;
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}
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$url .= $this->path;
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if ($this->query !== false) {
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$url .= '?' . $this->query;
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}
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if ($this->fragment !== false) {
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$url .= '#' . $this->fragment;
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}
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return $url;
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}
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/**
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* Returns a normalized string representation of this URL. This is useful
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* for comparison of URLs.
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*
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* @return string
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*/
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public function getNormalizedURL()
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{
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$url = clone $this;
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$url->normalize();
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return $url->getUrl();
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}
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/**
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* Returns a normalized Net_URL2 instance.
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*
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* @return Net_URL2
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*/
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public function normalize()
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{
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// See RFC 3886, section 6
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// Schemes are case-insensitive
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if ($this->scheme) {
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$this->scheme = strtolower($this->scheme);
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}
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// Hostnames are case-insensitive
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if ($this->host) {
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$this->host = strtolower($this->host);
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}
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// Remove default port number for known schemes (RFC 3986, section 6.2.3)
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if ($this->port &&
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$this->scheme &&
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$this->port == getservbyname($this->scheme, 'tcp')) {
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$this->port = false;
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}
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// Normalize case of %XX percentage-encodings (RFC 3986, section 6.2.2.1)
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foreach (array('userinfo', 'host', 'path') as $part) {
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if ($this->$part) {
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$this->$part = preg_replace('/%[0-9a-f]{2}/ie', 'strtoupper("\0")', $this->$part);
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}
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}
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// Path segment normalization (RFC 3986, section 6.2.2.3)
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$this->path = self::removeDotSegments($this->path);
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// Scheme based normalization (RFC 3986, section 6.2.3)
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if ($this->host && !$this->path) {
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$this->path = '/';
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}
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}
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/**
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* Returns whether this instance represents an absolute URL.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function isAbsolute()
|
|
{
|
|
return (bool) $this->scheme;
|
|
}
|
|
|
|
/**
|
|
* Returns an Net_URL2 instance representing an absolute URL relative to
|
|
* this URL.
|
|
*
|
|
* @param Net_URL2|string $reference relative URL
|
|
*
|
|
* @return Net_URL2
|
|
*/
|
|
public function resolve($reference)
|
|
{
|
|
if (is_string($reference)) {
|
|
$reference = new self($reference);
|
|
}
|
|
if (!$this->isAbsolute()) {
|
|
throw new Exception('Base-URL must be absolute');
|
|
}
|
|
|
|
// A non-strict parser may ignore a scheme in the reference if it is
|
|
// identical to the base URI's scheme.
|
|
if (!$this->getOption(self::OPTION_STRICT) && $reference->scheme == $this->scheme) {
|
|
$reference->scheme = false;
|
|
}
|
|
|
|
$target = new self('');
|
|
if ($reference->scheme !== false) {
|
|
$target->scheme = $reference->scheme;
|
|
$target->setAuthority($reference->getAuthority());
|
|
$target->path = self::removeDotSegments($reference->path);
|
|
$target->query = $reference->query;
|
|
} else {
|
|
$authority = $reference->getAuthority();
|
|
if ($authority !== false) {
|
|
$target->setAuthority($authority);
|
|
$target->path = self::removeDotSegments($reference->path);
|
|
$target->query = $reference->query;
|
|
} else {
|
|
if ($reference->path == '') {
|
|
$target->path = $this->path;
|
|
if ($reference->query !== false) {
|
|
$target->query = $reference->query;
|
|
} else {
|
|
$target->query = $this->query;
|
|
}
|
|
} else {
|
|
if (substr($reference->path, 0, 1) == '/') {
|
|
$target->path = self::removeDotSegments($reference->path);
|
|
} else {
|
|
// Merge paths (RFC 3986, section 5.2.3)
|
|
if ($this->host !== false && $this->path == '') {
|
|
$target->path = '/' . $this->path;
|
|
} else {
|
|
$i = strrpos($this->path, '/');
|
|
if ($i !== false) {
|
|
$target->path = substr($this->path, 0, $i + 1);
|
|
}
|
|
$target->path .= $reference->path;
|
|
}
|
|
$target->path = self::removeDotSegments($target->path);
|
|
}
|
|
$target->query = $reference->query;
|
|
}
|
|
$target->setAuthority($this->getAuthority());
|
|
}
|
|
$target->scheme = $this->scheme;
|
|
}
|
|
|
|
$target->fragment = $reference->fragment;
|
|
|
|
return $target;
|
|
}
|
|
|
|
/**
|
|
* Removes dots as described in RFC 3986, section 5.2.4, e.g.
|
|
* "/foo/../bar/baz" => "/bar/baz"
|
|
*
|
|
* @param string $path a path
|
|
*
|
|
* @return string a path
|
|
*/
|
|
private static function removeDotSegments($path)
|
|
{
|
|
$output = '';
|
|
|
|
// Make sure not to be trapped in an infinite loop due to a bug in this
|
|
// method
|
|
$j = 0;
|
|
while ($path && $j++ < 100) {
|
|
// Step A
|
|
if (substr($path, 0, 2) == './') {
|
|
$path = substr($path, 2);
|
|
} elseif (substr($path, 0, 3) == '../') {
|
|
$path = substr($path, 3);
|
|
|
|
// Step B
|
|
} elseif (substr($path, 0, 3) == '/./' || $path == '/.') {
|
|
$path = '/' . substr($path, 3);
|
|
|
|
// Step C
|
|
} elseif (substr($path, 0, 4) == '/../' || $path == '/..') {
|
|
$path = '/' . substr($path, 4);
|
|
$i = strrpos($output, '/');
|
|
$output = $i === false ? '' : substr($output, 0, $i);
|
|
|
|
// Step D
|
|
} elseif ($path == '.' || $path == '..') {
|
|
$path = '';
|
|
|
|
// Step E
|
|
} else {
|
|
$i = strpos($path, '/');
|
|
if ($i === 0) {
|
|
$i = strpos($path, '/', 1);
|
|
}
|
|
if ($i === false) {
|
|
$i = strlen($path);
|
|
}
|
|
$output .= substr($path, 0, $i);
|
|
$path = substr($path, $i);
|
|
}
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Returns a Net_URL2 instance representing the canonical URL of the
|
|
* currently executing PHP script.
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getCanonical()
|
|
{
|
|
if (!isset($_SERVER['REQUEST_METHOD'])) {
|
|
// ALERT - no current URL
|
|
throw new Exception('Script was not called through a webserver');
|
|
}
|
|
|
|
// Begin with a relative URL
|
|
$url = new self($_SERVER['PHP_SELF']);
|
|
$url->scheme = isset($_SERVER['HTTPS']) ? 'https' : 'http';
|
|
$url->host = $_SERVER['SERVER_NAME'];
|
|
$port = intval($_SERVER['SERVER_PORT']);
|
|
if ($url->scheme == 'http' && $port != 80 ||
|
|
$url->scheme == 'https' && $port != 443) {
|
|
|
|
$url->port = $port;
|
|
}
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Returns the URL used to retrieve the current request.
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getRequestedURL()
|
|
{
|
|
return self::getRequested()->getUrl();
|
|
}
|
|
|
|
/**
|
|
* Returns a Net_URL2 instance representing the URL used to retrieve the
|
|
* current request.
|
|
*
|
|
* @return Net_URL2
|
|
*/
|
|
public static function getRequested()
|
|
{
|
|
if (!isset($_SERVER['REQUEST_METHOD'])) {
|
|
// ALERT - no current URL
|
|
throw new Exception('Script was not called through a webserver');
|
|
}
|
|
|
|
// Begin with a relative URL
|
|
$url = new self($_SERVER['REQUEST_URI']);
|
|
$url->scheme = isset($_SERVER['HTTPS']) ? 'https' : 'http';
|
|
// Set host and possibly port
|
|
$url->setAuthority($_SERVER['HTTP_HOST']);
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Sets the specified option.
|
|
*
|
|
* @param string $optionName a self::OPTION_ constant
|
|
* @param mixed $value option value
|
|
*
|
|
* @return void
|
|
* @see self::OPTION_STRICT
|
|
* @see self::OPTION_USE_BRACKETS
|
|
* @see self::OPTION_ENCODE_KEYS
|
|
*/
|
|
function setOption($optionName, $value)
|
|
{
|
|
if (!array_key_exists($optionName, $this->options)) {
|
|
return false;
|
|
}
|
|
$this->options[$optionName] = $value;
|
|
}
|
|
|
|
/**
|
|
* Returns the value of the specified option.
|
|
*
|
|
* @param string $optionName The name of the option to retrieve
|
|
*
|
|
* @return mixed
|
|
*/
|
|
function getOption($optionName)
|
|
{
|
|
return isset($this->options[$optionName])
|
|
? $this->options[$optionName] : false;
|
|
}
|
|
}
|