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