include/pubsubpublish.php

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