6 * PubSub is a protocol which fasten up RSS fetching:
7 * - Every time a new link is posted, Shaarli notify the hub.
8 * - The hub notify all feed subscribers that a new link has been posted.
9 * - Subscribers retrieve the new link.
12 use pubsubhubbub\publisher\Publisher
;
13 use Shaarli\Config\ConfigManager
;
14 use Shaarli\Feed\FeedBuilder
;
17 * Plugin init function - set the hub to the default appspot one.
19 * @param ConfigManager $conf instance.
21 function pubsubhubbub_init($conf)
23 $hub = $conf->get('plugins.PUBSUBHUB_URL');
26 $conf->set('plugins.PUBSUBHUB_URL', 'https://pubsubhubbub.appspot.com/');
33 * Adds the hub URL in ATOM and RSS feed.
35 * @param array $data Template data.
36 * @param ConfigManager $conf instance.
38 * @return array updated template data.
40 function hook_pubsubhubbub_render_feed($data, $conf)
42 $feedType = $data['_PAGE_'] == Router
::$PAGE_FEED_RSS ? FeedBuilder
::$FEED_RSS : FeedBuilder
::$FEED_ATOM;
43 $template = file_get_contents(PluginManager
::$PLUGINS_PATH . '/pubsubhubbub/hub.'. $feedType .'.xml');
44 $data['feed_plugins_header'][] = sprintf($template, $conf->get('plugins.PUBSUBHUB_URL'));
51 * Publish to the hub when a link is saved.
53 * @param array $data Template data.
54 * @param ConfigManager $conf instance.
56 * @return array unaltered data.
58 function hook_pubsubhubbub_save_link($data, $conf)
61 index_url($_SERVER) .'?do=atom',
62 index_url($_SERVER) .'?do=rss',
65 $httpPost = function_exists('curl_version') ? false : 'nocurl_http_post';
67 $p = new Publisher($conf->get('plugins.PUBSUBHUB_URL'));
68 $p->publish_update($feeds, $httpPost);
69 } catch (Exception
$e) {
70 error_log(sprintf(t('Could not publish to PubSubHubbub: %s'), $e->getMessage()));
77 * Http function used to post to the hub endpoint without cURL extension.
79 * @param string $url Hub endpoint.
80 * @param string $postString String to POST.
84 * @throws Exception An error occurred.
86 function nocurl_http_post($url, $postString)
88 $params = array('http' => array(
90 'content' => $postString,
91 'user_agent' => 'PubSubHubbub-Publisher-PHP/1.0',
94 $context = stream_context_create($params);
95 $fp = @fopen($url, 'rb', false, $context);
97 throw new Exception(sprintf(t('Could not post to %s'), $url));
99 $response = @stream_get_contents($fp);
100 if ($response === false) {
101 throw new Exception(sprintf(t('Bad response from the hub %s'), $url));
107 * This function is never called, but contains translation calls for GNU gettext extraction.
109 function pubsubhubbub_dummy_translation()
112 t('Enable PubSubHubbub feed publishing.');