102 lines
2.7 KiB
PHP
102 lines
2.7 KiB
PHP
|
<?php
|
||
|
|
||
|
/**
|
||
|
* PubSubHubbub plugin.
|
||
|
*
|
||
|
* PubSub is a protocol which fasten up RSS fetching:
|
||
|
* - Every time a new link is posted, Shaarli notify the hub.
|
||
|
* - The hub notify all feed subscribers that a new link has been posted.
|
||
|
* - Subscribers retrieve the new link.
|
||
|
*/
|
||
|
|
||
|
use pubsubhubbub\publisher\Publisher;
|
||
|
|
||
|
/**
|
||
|
* Plugin init function - set the hub to the default appspot one.
|
||
|
*
|
||
|
* @param ConfigManager $conf instance.
|
||
|
*/
|
||
|
function pubsubhubbub_init($conf)
|
||
|
{
|
||
|
$hub = $conf->get('plugins.PUBSUBHUB_URL');
|
||
|
if (empty($hub)) {
|
||
|
// Default hub.
|
||
|
$conf->set('plugins.PUBSUBHUB_URL', 'https://pubsubhubbub.appspot.com/');
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/**
|
||
|
* Render feed hook.
|
||
|
* Adds the hub URL in ATOM and RSS feed.
|
||
|
*
|
||
|
* @param array $data Template data.
|
||
|
* @param ConfigManager $conf instance.
|
||
|
*
|
||
|
* @return array updated template data.
|
||
|
*/
|
||
|
function hook_pubsubhubbub_render_feed($data, $conf)
|
||
|
{
|
||
|
$feedType = $data['_PAGE_'] == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
|
||
|
$template = file_get_contents(PluginManager::$PLUGINS_PATH . '/pubsubhubbub/hub.'. $feedType .'.xml');
|
||
|
$data['feed_plugins_header'][] = sprintf($template, $conf->get('plugins.PUBSUBHUB_URL'));
|
||
|
|
||
|
return $data;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Save link hook.
|
||
|
* Publish to the hub when a link is saved.
|
||
|
*
|
||
|
* @param array $data Template data.
|
||
|
* @param ConfigManager $conf instance.
|
||
|
*
|
||
|
* @return array unaltered data.
|
||
|
*/
|
||
|
function hook_pubsubhubbub_save_link($data, $conf)
|
||
|
{
|
||
|
$feeds = array(
|
||
|
index_url($_SERVER) .'?do=atom',
|
||
|
index_url($_SERVER) .'?do=rss',
|
||
|
);
|
||
|
|
||
|
$httpPost = function_exists('curl_version') ? false : 'nocurl_http_post';
|
||
|
try {
|
||
|
$p = new Publisher($conf->get('plugins.PUBSUBHUB_URL'));
|
||
|
$p->publish_update($feeds, $httpPost);
|
||
|
} catch (Exception $e) {
|
||
|
error_log('Could not publish to PubSubHubbub: ' . $e->getMessage());
|
||
|
}
|
||
|
|
||
|
return $data;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Http function used to post to the hub endpoint without cURL extension.
|
||
|
*
|
||
|
* @param string $url Hub endpoint.
|
||
|
* @param string $postString String to POST.
|
||
|
*
|
||
|
* @return bool
|
||
|
*
|
||
|
* @throws Exception An error occurred.
|
||
|
*/
|
||
|
function nocurl_http_post($url, $postString) {
|
||
|
$params = array('http' => array(
|
||
|
'method' => 'POST',
|
||
|
'content' => $postString,
|
||
|
'user_agent' => 'PubSubHubbub-Publisher-PHP/1.0',
|
||
|
));
|
||
|
|
||
|
$context = stream_context_create($params);
|
||
|
$fp = @fopen($url, 'rb', false, $context);
|
||
|
if (!$fp) {
|
||
|
throw new Exception('Could not post to '. $url);
|
||
|
}
|
||
|
$response = @stream_get_contents($fp);
|
||
|
if ($response === false) {
|
||
|
throw new Exception('Bad response from the hub '. $url);
|
||
|
}
|
||
|
return $response;
|
||
|
}
|