src/Worker/PubSubPublish.php

   1 <?php
   2 /**
   3  * @file src/Worker/PubSubPublish.php
   4  */
   5
   6 namespace Friendica\Worker;
   7
   8 use Friendica\App;
   9 use Friendica\Core\System;
  10 use Friendica\Core\Config;
  11 use Friendica\Core\Worker;
  12 use Friendica\Database\DBM;
  13 use Friendica\Protocol\OStatus;
  14
  15 require_once 'include/items.php';
  16
  17 class PubSubPublish {
  18         public static function execute($pubsubpublish_id = 0)
  19         {
  20                 global $a;
  21
  22                 if ($pubsubpublish_id == 0) {
  23                         // We'll push to each subscriber that has push > 0,
  24                         // i.e. there has been an update (set in notifier.php).
  25                         $r = q("SELECT `id`, `callback_url` FROM `push_subscriber` WHERE `push` > 0 ORDER BY `last_update` DESC");
  26
  27                         foreach ($r as $rr) {
  28                                 logger("Publish feed to ".$rr["callback_url"], LOGGER_DEBUG);
  29                                 Worker::add(array('priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true),
  30                                                 'PubSubPublish', (int)$rr["id"]);
  31                         }
  32                 }
  33
  34                 self::publish($pubsubpublish_id);
  35
  36                 return;
  37         }
  38
  39         private static function publish($id) {
  40                 global $a;
  41
  42                 $r = q("SELECT * FROM `push_subscriber` WHERE `id` = %d", intval($id));
  43                 if (!DBM::is_result($r)) {
  44                         return;
  45                 }
  46
  47                 $rr = $r[0];
  48
  49                 /// @todo Check server status with PortableContact::checkServer()
  50                 // Before this can be done we need a way to safely detect the server url.
  51
  52                 logger("Generate feed of user ".$rr['nickname']." to ".$rr['callback_url']." - last updated ".$rr['last_update'], LOGGER_DEBUG);
  53
  54                 $last_update = $rr['last_update'];
  55                 $params = OStatus::feed($a, $rr['nickname'], $last_update);
  56
  57                 if (!$params) {
  58                         return;
  59                 }
  60
  61                 $hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
  62
  63                 $headers = array("Content-type: application/atom+xml",
  64                                 sprintf("Link: <%s>;rel=hub,<%s>;rel=self",
  65                                         System::baseUrl().'/pubsubhubbub/'.$rr['nickname'],
  66                                         $rr['topic']),
  67                                 "X-Hub-Signature: sha1=".$hmac_sig);
  68
  69                 logger('POST '.print_r($headers, true)."\n".$params, LOGGER_DEBUG);
  70
  71                 post_url($rr['callback_url'], $params, $headers);
  72                 $ret = $a->get_curl_code();
  73
  74                 if ($ret >= 200 && $ret <= 299) {
  75                         logger('successfully pushed to '.$rr['callback_url']);
  76
  77                         // set last_update to the "created" date of the last item, and reset push=0
  78                         q("UPDATE `push_subscriber` SET `push` = 0, last_update = '%s' WHERE id = %d",
  79                                 dbesc($last_update),
  80                                 intval($rr['id']));
  81
  82                 } else {
  83                         logger('error when pushing to '.$rr['callback_url'].' HTTP: '.$ret);
  84
  85                         // we use the push variable also as a counter, if we failed we
  86                         // increment this until some upper limit where we give up
  87                         $new_push = intval($rr['push']) + 1;
  88
  89                         if ($new_push > 30) // OK, let's give up
  90                                 $new_push = 0;
  91
  92                         q("UPDATE `push_subscriber` SET `push` = %d WHERE id = %d",
  93                                 $new_push,
  94                                 intval($rr['id']));
  95                 }
  96         }
  97 }