include/pubsubpublish.php

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