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 use Friendica\Util\Network;
  15
  16 require_once 'include/items.php';
  17
  18 class PubSubPublish {
  19         public static function execute($pubsubpublish_id = 0)
  20         {
  21                 global $a;
  22
  23                 if ($pubsubpublish_id == 0) {
  24                         // We'll push to each subscriber that has push > 0,
  25                         // i.e. there has been an update (set in notifier.php).
  26                         $r = q("SELECT `id`, `callback_url` FROM `push_subscriber` WHERE `push` > 0 ORDER BY `last_update` DESC");
  27
  28                         foreach ($r as $rr) {
  29                                 logger("Publish feed to ".$rr["callback_url"], LOGGER_DEBUG);
  30                                 Worker::add(['priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true],
  31                                                 'PubSubPublish', (int)$rr["id"]);
  32                         }
  33                 }
  34
  35                 self::publish($pubsubpublish_id);
  36
  37                 return;
  38         }
  39
  40         private static function publish($id) {
  41                 global $a;
  42
  43                 $r = q("SELECT * FROM `push_subscriber` WHERE `id` = %d", intval($id));
  44                 if (!DBM::is_result($r)) {
  45                         return;
  46                 }
  47
  48                 $rr = $r[0];
  49
  50                 /// @todo Check server status with PortableContact::checkServer()
  51                 // Before this can be done we need a way to safely detect the server url.
  52
  53                 logger("Generate feed of user ".$rr['nickname']." to ".$rr['callback_url']." - last updated ".$rr['last_update'], LOGGER_DEBUG);
  54
  55                 $last_update = $rr['last_update'];
  56                 $params = OStatus::feed($rr['nickname'], $last_update);
  57
  58                 if (!$params) {
  59                         return;
  60                 }
  61
  62                 $hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
  63
  64                 $headers = ["Content-type: application/atom+xml",
  65                                 sprintf("Link: <%s>;rel=hub,<%s>;rel=self",
  66                                         System::baseUrl().'/pubsubhubbub/'.$rr['nickname'],
  67                                         $rr['topic']),
  68                                 "X-Hub-Signature: sha1=".$hmac_sig];
  69
  70                 logger('POST '.print_r($headers, true)."\n".$params, LOGGER_DEBUG);
  71
  72                 Network::post($rr['callback_url'], $params, $headers);
  73                 $ret = $a->get_curl_code();
  74
  75                 if ($ret >= 200 && $ret <= 299) {
  76                         logger('successfully pushed to '.$rr['callback_url']);
  77
  78                         // set last_update to the "created" date of the last item, and reset push=0
  79                         q("UPDATE `push_subscriber` SET `push` = 0, last_update = '%s' WHERE id = %d",
  80                                 dbesc($last_update),
  81                                 intval($rr['id']));
  82
  83                 } else {
  84                         logger('error when pushing to '.$rr['callback_url'].' HTTP: '.$ret);
  85
  86                         // we use the push variable also as a counter, if we failed we
  87                         // increment this until some upper limit where we give up
  88                         $new_push = intval($rr['push']) + 1;
  89
  90                         if ($new_push > 30) // OK, let's give up
  91                                 $new_push = 0;
  92
  93                         q("UPDATE `push_subscriber` SET `push` = %d WHERE id = %d",
  94                                 $new_push,
  95                                 intval($rr['id']));
  96                 }
  97         }
  98 }