+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($rr['id']));
+ }
+ }
+}
+
+
+function queue_run(&$argv, &$argc){