include/pubsubpublish.php

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