-function handle_pubsubhubbub() {
- global $a, $db;
-
- logger('queue [pubsubhubbub]: start');
-
- // We'll push to each subscriber that has push > 0,
- // i.e. there has been an update (set in notifier.php).
-
- $r = q("SELECT * FROM `push_subscriber` WHERE `push` > 0");
-
- foreach($r as $rr) {
- $params = get_feed_for($a, '', $rr['nickname'], $rr['last_update']);
- $hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
-
- $headers = array("Content-type: application/atom+xml",
- sprintf("Link: <%s>;rel=hub," .
- "<%s>;rel=self",
- $a->get_baseurl() . '/pubsubhubbub',
- $rr['topic']),
- "X-Hub-Signature: sha1=" . $hmac_sig);
-
- logger('queue [pubsubhubbub]: POST', $headers);
-
- post_url($rr['callback_url'], $params, $headers);
- $ret = $a->get_curl_code();
-
- if ($ret >= 200 && $ret <= 299) {
- logger('queue [pubsubhubbub]: successfully pushed to ' .
- $rr['callback_url']);
-
- // set last_update to "now", and reset push=0
- $date_now = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
- q("UPDATE `push_subscriber` SET `push` = 0, last_update = '%s' " .
- "WHERE id = %d",
- dbesc($date_now),
- intval($rr['id']));
-
- } else {
- logger('queue [pubsubhubbub]: error when pushing to ' .
- $rr['callback_url'] . 'HTTP: ', $ret);
-
- // we use the push variable also as a counter, if we failed we
- // increment this until some upper limit where we give up
- $new_push = intval($rr['push']) + 1;
-
- if ($new_push > 30) // OK, let's give up
- $new_push = 0;
-
- q("UPDATE `push_subscriber` SET `push` = %d, last_update = '%s' " .
- "WHERE id = %d",
- $new_push,
- dbesc($date_now),
- intval($rr['id']));
- }
- }
-}
-
-