336 lines
10 KiB
PHP
336 lines
10 KiB
PHP
<?php
|
|
/**
|
|
* Action to let RSSCloud aggregators request update notification when
|
|
* user profile feeds change.
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* @category Plugin
|
|
* @package StatusNet
|
|
* @author Zach Copley <zach@status.net>
|
|
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
|
|
* @link http://status.net/
|
|
*
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2009, StatusNet, Inc.
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
if (!defined('STATUSNET')) {
|
|
exit(1);
|
|
}
|
|
|
|
/**
|
|
* Action class to handle RSSCloud notification (subscription) requests
|
|
*
|
|
* @category Plugin
|
|
* @package StatusNet
|
|
* @author Zach Copley <zach@status.net>
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
class RSSCloudRequestNotifyAction extends Action
|
|
{
|
|
/**
|
|
* Initialization.
|
|
*
|
|
* @param array $args Web and URL arguments
|
|
*
|
|
* @return boolean false if user doesn't exist
|
|
*/
|
|
function prepare($args)
|
|
{
|
|
parent::prepare($args);
|
|
|
|
$this->ip = $_SERVER['REMOTE_ADDR'];
|
|
$this->port = $this->arg('port');
|
|
$this->path = $this->arg('path');
|
|
|
|
if ($this->path[0] != '/') {
|
|
$this->path = '/' . $this->path;
|
|
}
|
|
|
|
$this->protocol = $this->arg('protocol');
|
|
$this->procedure = $this->arg('notifyProcedure');
|
|
$this->domain = $this->arg('domain');
|
|
|
|
$this->feeds = $this->getFeeds();
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Handle the request
|
|
*
|
|
* Checks for all the required parameters for a subscription,
|
|
* validates that the feed being subscribed to is real, and then
|
|
* saves the subsctiption.
|
|
*
|
|
* @param array $args $_REQUEST data (unused)
|
|
*
|
|
* @return void
|
|
*/
|
|
function handle()
|
|
{
|
|
parent::handle();
|
|
|
|
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
|
|
// TRANS: Form validation error displayed when POST is not used.
|
|
$this->showResult(false, _m('Request must be POST.'));
|
|
return;
|
|
}
|
|
|
|
$missing = array();
|
|
|
|
if (empty($this->port)) {
|
|
$missing[] = 'port';
|
|
}
|
|
|
|
if (empty($this->path)) {
|
|
$missing[] = 'path';
|
|
}
|
|
|
|
if (empty($this->protocol)) {
|
|
$missing[] = 'protocol';
|
|
} else if (strtolower($this->protocol) != 'http-post') {
|
|
// TRANS: Form validation error displayed when HTTP POST is not used.
|
|
$msg = _m('Only HTTP POST notifications are supported at this time.');
|
|
$this->showResult(false, $msg);
|
|
return;
|
|
}
|
|
|
|
if (!isset($this->procedure)) {
|
|
$missing[] = 'notifyProcedure';
|
|
}
|
|
|
|
if (!empty($missing)) {
|
|
// TRANS: List separator.
|
|
$separator = _m('SEPARATOR',', ');
|
|
// TRANS: Form validation error displayed when a request body is missing expected parameters.
|
|
// TRANS: %s is a list of parameters separated by a list separator (default: ", ").
|
|
$msg = sprintf(_m('The following parameters were missing from the request body: %s.'),implode($separator, $missing));
|
|
$this->showResult(false, $msg);
|
|
return;
|
|
}
|
|
|
|
if (empty($this->feeds)) {
|
|
// TRANS: Form validation error displayed when not providing any valid profile feed URLs.
|
|
$msg = _m('You must provide at least one valid profile feed URL ' .
|
|
'(url1, url2, url3 ... urlN).');
|
|
$this->showResult(false, $msg);
|
|
return;
|
|
}
|
|
|
|
// We have to validate everything before saving anything.
|
|
// We only return one success or failure no matter how
|
|
// many feeds the subscriber is trying to subscribe to
|
|
foreach ($this->feeds as $feed) {
|
|
if (!$this->validateFeed($feed)) {
|
|
$nh = $this->getNotifyUrl();
|
|
common_log(LOG_WARNING,
|
|
"RSSCloud plugin - $nh tried to subscribe to invalid feed: $feed");
|
|
|
|
// TRANS: Form validation error displayed when not providing a valid feed URL.
|
|
$msg = _m('Feed subscription failed: Not a valid feed.');
|
|
$this->showResult(false, $msg);
|
|
return;
|
|
}
|
|
|
|
if (!$this->testNotificationHandler($feed)) {
|
|
// TRANS: Form validation error displayed when feed subscription failed.
|
|
$msg = _m('Feed subscription failed: ' .
|
|
'Notification handler does not respond correctly.');
|
|
$this->showResult(false, $msg);
|
|
return;
|
|
}
|
|
}
|
|
|
|
foreach ($this->feeds as $feed) {
|
|
$this->saveSubscription($feed);
|
|
}
|
|
|
|
// XXX: What to do about deleting stale subscriptions?
|
|
// 25 hours seems harsh. WordPress doesn't ever remove
|
|
// subscriptions.
|
|
// TRANS: Success message after subscribing to one or more feeds.
|
|
$msg = _m('Thanks for the subscription. ' .
|
|
'When the feed(s) update(s), you will be notified.');
|
|
|
|
$this->showResult(true, $msg);
|
|
}
|
|
|
|
/**
|
|
* Validate that the requested feed is one we serve
|
|
* up via RSSCloud.
|
|
*
|
|
* @param string $feed the feed in question
|
|
*
|
|
* @return void
|
|
*/
|
|
function validateFeed($feed)
|
|
{
|
|
$user = $this->userFromFeed($feed);
|
|
|
|
if (empty($user)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Pull all of the urls (url1, url2, url3...urlN) that
|
|
* the subscriber wants to subscribe to.
|
|
*
|
|
* @return array $feeds the list of feeds
|
|
*/
|
|
function getFeeds()
|
|
{
|
|
$feeds = array();
|
|
|
|
while (list($key, $feed) = each($this->args)) {
|
|
if (preg_match('/^url\d*$/', $key)) {
|
|
$feeds[] = $feed;
|
|
}
|
|
}
|
|
|
|
return $feeds;
|
|
}
|
|
|
|
/**
|
|
* Test that a notification handler is there and is reponding
|
|
* correctly. This is called before adding a subscription.
|
|
*
|
|
* @param string $feed the feed to verify
|
|
*
|
|
* @return boolean success result
|
|
*/
|
|
function testNotificationHandler($feed)
|
|
{
|
|
$notifyUrl = $this->getNotifyUrl();
|
|
|
|
$notifier = new RSSCloudNotifier();
|
|
|
|
if (isset($this->domain)) {
|
|
// 'domain' param set, so we have to use GET and send a challenge
|
|
common_log(LOG_INFO,
|
|
'RSSCloud plugin - Testing notification handler with challenge: ' .
|
|
$notifyUrl);
|
|
return $notifier->challenge($notifyUrl, $feed);
|
|
} else {
|
|
common_log(LOG_INFO, 'RSSCloud plugin - Testing notification handler: ' .
|
|
$notifyUrl);
|
|
|
|
return $notifier->postUpdate($notifyUrl, $feed);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Build the URL for the notification handler based on the
|
|
* parameters passed in with the subscription request.
|
|
*
|
|
* @return string notification handler url
|
|
*/
|
|
function getNotifyUrl()
|
|
{
|
|
if (isset($this->domain)) {
|
|
return 'http://' . $this->domain . ':' . $this->port . $this->path;
|
|
} else {
|
|
return 'http://' . $this->ip . ':' . $this->port . $this->path;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Uses the nickname part of the subscribed feed URL to figure out
|
|
* whethere there's really a user with such a feed. Used to
|
|
* validate feeds before adding a subscription.
|
|
*
|
|
* @param string $feed the feed in question
|
|
*
|
|
* @return boolean success
|
|
*/
|
|
function userFromFeed($feed)
|
|
{
|
|
// We only do canonical RSS2 profile feeds (specified by ID), e.g.:
|
|
// http://www.example.com/api/statuses/user_timeline/2.rss
|
|
$path = common_path('api/statuses/user_timeline/');
|
|
$valid = '%^' . $path . '(?<id>.*)\.rss$%';
|
|
|
|
if (preg_match($valid, $feed, $matches)) {
|
|
$user = User::getKV('id', $matches['id']);
|
|
if (!empty($user)) {
|
|
return $user;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Save an RSSCloud subscription
|
|
*
|
|
* @param string $feed a valid profile feed
|
|
*
|
|
* @return boolean success result
|
|
*/
|
|
function saveSubscription($feed)
|
|
{
|
|
$user = $this->userFromFeed($feed);
|
|
|
|
$notifyUrl = $this->getNotifyUrl();
|
|
|
|
$sub = RSSCloudSubscription::getSubscription($user->id, $notifyUrl);
|
|
|
|
if ($sub) {
|
|
common_log(LOG_INFO, "RSSCloud plugin - $notifyUrl refreshed subscription" .
|
|
" to user $user->nickname (id: $user->id).");
|
|
} else {
|
|
$sub = new RSSCloudSubscription();
|
|
|
|
$sub->subscribed = $user->id;
|
|
$sub->url = $notifyUrl;
|
|
$sub->created = common_sql_now();
|
|
|
|
if (!$sub->insert()) {
|
|
common_log_db_error($sub, 'INSERT', __FILE__);
|
|
return false;
|
|
}
|
|
|
|
common_log(LOG_INFO, "RSSCloud plugin - $notifyUrl subscribed" .
|
|
" to user $user->nickname (id: $user->id)");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Show an XML message indicating the subscription
|
|
* was successful or failed.
|
|
*
|
|
* @param boolean $success whether it was good or bad
|
|
* @param string $msg the message to output
|
|
*
|
|
* @return boolean success result
|
|
*/
|
|
function showResult($success, $msg)
|
|
{
|
|
$this->startXML();
|
|
$this->elementStart('notifyResult',
|
|
array('success' => ($success) ? 'true' : 'false',
|
|
'msg' => $msg));
|
|
$this->endXML();
|
|
}
|
|
}
|