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