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 Friendica\Util\DateTimeFormat;
  16 use dba;
  17
  18 require_once 'include/items.php';
  19
  20 class PubSubPublish {
  21         public static function execute($pubsubpublish_id = 0)
  22         {
  23                 if ($pubsubpublish_id == 0) {
  24                         return;
  25                 }
  26
  27                 self::publish($pubsubpublish_id);
  28         }
  29
  30         private static function publish($id) {
  31                 global $a;
  32
  33                 $subscriber = dba::selectFirst('push_subscriber', [], ['id' => $id]);
  34                 if (!DBM::is_result($subscriber)) {
  35                         return;
  36                 }
  37
  38                 /// @todo Check server status with PortableContact::checkServer()
  39                 // Before this can be done we need a way to safely detect the server url.
  40
  41                 logger("Generate feed of user " . $subscriber['nickname']. " to " . $subscriber['callback_url']. " - last updated " . $subscriber['last_update'], LOGGER_DEBUG);
  42
  43                 $last_update = $subscriber['last_update'];
  44                 $params = OStatus::feed($subscriber['nickname'], $last_update);
  45
  46                 if (!$params) {
  47                         return;
  48                 }
  49
  50                 $hmac_sig = hash_hmac("sha1", $params, $subscriber['secret']);
  51
  52                 $headers = ["Content-type: application/atom+xml",
  53                                 sprintf("Link: <%s>;rel=hub,<%s>;rel=self",
  54                                         System::baseUrl() . '/pubsubhubbub/' . $subscriber['nickname'],
  55                                         $subscriber['topic']),
  56                                 "X-Hub-Signature: sha1=" . $hmac_sig];
  57
  58                 logger('POST ' . print_r($headers, true) . "\n" . $params, LOGGER_DATA);
  59
  60                 Network::post($subscriber['callback_url'], $params, $headers);
  61                 $ret = $a->get_curl_code();
  62
  63                 $condition = ['id' => $subscriber['id']];
  64
  65                 if ($ret >= 200 && $ret <= 299) {
  66                         logger('Successfully pushed to ' . $subscriber['callback_url']);
  67
  68                         // set last_update to the "created" date of the last item, and reset push=0
  69                         $fields = ['push' => 0, 'next_try' => NULL_DATE, 'last_update' => $last_update];
  70                         dba::update('push_subscriber', $fields, $condition);
  71
  72                 } else {
  73                         logger('Delivery error when pushing to ' . $subscriber['callback_url'] . ' HTTP: ' . $ret);
  74
  75                         // we use the push variable also as a counter, if we failed we
  76                         // increment this until some upper limit where we give up
  77                         $retrial = $subscriber['push'];
  78
  79                         if ($retrial > 14) {
  80                                 dba::update('push_subscriber', ['push' => 0, 'next_try' => NULL_DATE], $condition);
  81                                 logger('Delivery error: Giving up for ' . $subscriber['callback_url'], LOGGER_DEBUG);
  82                         } else {
  83                                 // Calculate the delay until the next trial
  84                                 $delay = (($retrial + 3) ** 4) + (rand(1, 30) * ($retrial + 1));
  85                                 $next = DateTimeFormat::utc('now + ' . $delay . ' seconds');
  86
  87                                 $retrial = $retrial + 1;
  88
  89                                 dba::update('push_subscriber', ['push' => $retrial, 'next_try' => $next], $condition);
  90                                 logger('Delivery error: Next try (' . $retrial . ') for ' . $subscriber['callback_url'] . ' at ' . $next, LOGGER_DEBUG);
  91                         }
  92                 }
  93         }
  94 }