include/pubsubpublish.php

   1 <?php
   2 require_once("boot.php");
   3
   4 function handle_pubsubhubbub() {
   5         global $a, $db;
   6
   7         logger('start');
   8
   9         // We'll push to each subscriber that has push > 0,
  10         // i.e. there has been an update (set in notifier.php).
  11
  12         $r = q("SELECT * FROM `push_subscriber` WHERE `push` > 0");
  13
  14         foreach($r as $rr) {
  15                 $params = get_feed_for($a, '', $rr['nickname'], $rr['last_update'], 0, true);
  16                 $hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
  17
  18                 $headers = array("Content-type: application/atom+xml",
  19                                                 sprintf("Link: <%s>;rel=hub," .
  20                                                                 "<%s>;rel=self",
  21                                                                 $a->get_baseurl() . '/pubsubhubbub',
  22                                                                 $rr['topic']),
  23                                                 "X-Hub-Signature: sha1=" . $hmac_sig);
  24
  25                 logger('POST '. print_r($headers, true)."\n".$params, LOGGER_DEBUG);
  26
  27                 post_url($rr['callback_url'], $params, $headers);
  28                 $ret = $a->get_curl_code();
  29
  30                 if ($ret >= 200 && $ret <= 299) {
  31                         logger('successfully pushed to '.$rr['callback_url']);
  32
  33                         // set last_update to "now", and reset push=0
  34                         $date_now = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
  35                         q("UPDATE `push_subscriber` SET `push` = 0, last_update = '%s' WHERE id = %d",
  36                                 dbesc($date_now),
  37                                 intval($rr['id']));
  38
  39                 } else {
  40                         logger('error when pushing to '.$rr['callback_url'].' HTTP: '.$ret);
  41
  42                         // we use the push variable also as a counter, if we failed we
  43                         // increment this until some upper limit where we give up
  44                         $new_push = intval($rr['push']) + 1;
  45
  46                         if ($new_push > 30) // OK, let's give up
  47                                 $new_push = 0;
  48
  49                         q("UPDATE `push_subscriber` SET `push` = %d WHERE id = %d",
  50                                 $new_push,
  51                                 intval($rr['id']));
  52                 }
  53         }
  54
  55         logger('done');
  56 }
  57
  58
  59 function pubsubpublish_run(&$argv, &$argc){
  60         global $a, $db;
  61
  62         if(is_null($a)){
  63                 $a = new App;
  64         }
  65
  66         if(is_null($db)){
  67                 @include(".htconfig.php");
  68                 require_once("include/dba.php");
  69                 $db = new dba($db_host, $db_user, $db_pass, $db_data);
  70                 unset($db_host, $db_user, $db_pass, $db_data);
  71         };
  72
  73         require_once('include/items.php');
  74         require_once('include/pidfile.php');
  75
  76         load_config('config');
  77         load_config('system');
  78
  79         $lockpath = get_lockpath();
  80         if ($lockpath != '') {
  81                 $pidfile = new pidfile($lockpath, 'pubsubpublish');
  82                 if($pidfile->is_already_running()) {
  83                         logger("Already running");
  84                         if ($pidfile->running_time() > 9*60) {
  85                                 $pidfile->kill();
  86                                 logger("killed stale process");
  87                                 // Calling a new instance
  88                                 proc_run('php',"include/pubsubpublish.php");
  89                         }
  90                         return;
  91                 }
  92         }
  93
  94         $a->set_baseurl(get_config('system','url'));
  95
  96         load_hooks();
  97
  98         if($argc > 1)
  99                 $pubsubpublish_id = intval($argv[1]);
 100         else
 101                 $pubsubpublish_id = 0;
 102
 103         handle_pubsubhubbub();
 104
 105         return;
 106
 107 }
 108
 109 if (array_search(__file__,get_included_files())===0){
 110   pubsubpublish_run($_SERVER["argv"],$_SERVER["argc"]);
 111   killme();
 112 }
 113