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[friendica.git] / 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
15 require_once 'include/items.php';
16
17 class PubSubPublish {
18         public static function execute($pubsubpublish_id = 0)
19         {
20                 global $a;
21
22                 if ($pubsubpublish_id == 0) {
23                         // We'll push to each subscriber that has push > 0,
24                         // i.e. there has been an update (set in notifier.php).
25                         $r = q("SELECT `id`, `callback_url` FROM `push_subscriber` WHERE `push` > 0 ORDER BY `last_update` DESC");
26
27                         foreach ($r as $rr) {
28                                 logger("Publish feed to ".$rr["callback_url"], LOGGER_DEBUG);
29                                 Worker::add(array('priority' => PRIORITY_HIGH, 'created' => $a->queue['created'], 'dont_fork' => true),
30                                                 'PubSubPublish', (int)$rr["id"]);
31                         }
32                 }
33
34                 self::publish($pubsubpublish_id);
35
36                 return;
37         }
38
39         private static function publish($id) {
40                 global $a;
41
42                 $r = q("SELECT * FROM `push_subscriber` WHERE `id` = %d", intval($id));
43                 if (!DBM::is_result($r)) {
44                         return;
45                 }
46
47                 $rr = $r[0];
48
49                 /// @todo Check server status with PortableContact::checkServer()
50                 // Before this can be done we need a way to safely detect the server url.
51
52                 logger("Generate feed of user ".$rr['nickname']." to ".$rr['callback_url']." - last updated ".$rr['last_update'], LOGGER_DEBUG);
53
54                 $last_update = $rr['last_update'];
55                 $params = OStatus::feed($a, $rr['nickname'], $last_update);
56
57                 if (!$params) {
58                         return;
59                 }
60
61                 $hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
62
63                 $headers = array("Content-type: application/atom+xml",
64                                 sprintf("Link: <%s>;rel=hub,<%s>;rel=self",
65                                         System::baseUrl().'/pubsubhubbub/'.$rr['nickname'],
66                                         $rr['topic']),
67                                 "X-Hub-Signature: sha1=".$hmac_sig);
68
69                 logger('POST '.print_r($headers, true)."\n".$params, LOGGER_DEBUG);
70
71                 post_url($rr['callback_url'], $params, $headers);
72                 $ret = $a->get_curl_code();
73
74                 if ($ret >= 200 && $ret <= 299) {
75                         logger('successfully pushed to '.$rr['callback_url']);
76
77                         // set last_update to the "created" date of the last item, and reset push=0
78                         q("UPDATE `push_subscriber` SET `push` = 0, last_update = '%s' WHERE id = %d",
79                                 dbesc($last_update),
80                                 intval($rr['id']));
81
82                 } else {
83                         logger('error when pushing to '.$rr['callback_url'].' HTTP: '.$ret);
84
85                         // we use the push variable also as a counter, if we failed we
86                         // increment this until some upper limit where we give up
87                         $new_push = intval($rr['push']) + 1;
88
89                         if ($new_push > 30) // OK, let's give up
90                                 $new_push = 0;
91
92                         q("UPDATE `push_subscriber` SET `push` = %d WHERE id = %d",
93                                 $new_push,
94                                 intval($rr['id']));
95                 }
96         }
97 }