include/poller.php

   1 <?php
   2
   3
   4         require_once('boot.php');
   5
   6         $a = new App;
   7
   8         @include('.htconfig.php');
   9         require_once('dba.php');
  10         $db = new dba($db_host, $db_user, $db_pass, $db_data);
  11                 unset($db_host, $db_user, $db_pass, $db_data);
  12
  13         require_once('session.php');
  14         require_once('datetime.php');
  15         require_once('simplepie/simplepie.inc');
  16         require_once('include/items.php');
  17
  18         require_once('include/Contact.php');
  19
  20         $debugging = get_config('system','debugging');
  21
  22         $a->set_baseurl(get_config('system','url'));
  23
  24         $contacts = q("SELECT * FROM `contact`
  25                 WHERE `network` = 'dfrn' AND ( `dfrn-id` != '' OR (`issued-id` != '' AND `duplex` = 1))
  26                 AND `self` = 0 AND `blocked` = 0 AND `readonly` = 0 ORDER BY RAND()");
  27
  28         if(! count($contacts))
  29                 killme();
  30
  31         foreach($contacts as $contact) {
  32
  33                 if($contact['priority'] || $contact['subhub']) {
  34
  35                         $update = false;
  36
  37                         // We should be getting everything via a hub. But just to be sure, let's check once a day.
  38                         // This also lets us update our subscription to the hub, and add or replace hubs in case it
  39                         // changed.
  40
  41                         if($contact['subhub'])
  42                                 $contact['priority'] = 3;
  43
  44                         $t = $contact['last-update'];
  45
  46                         switch ($contact['priority']) {
  47                                 case 5:
  48                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 month"))
  49                                                 $update = true;
  50                                         break;
  51                                 case 4:
  52                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 week"))
  53                                                 $update = true;
  54                                         break;
  55                                 case 3:
  56                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 day"))
  57                                                 $update = true;
  58                                         break;
  59                                 case 2:
  60                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 12 hour"))
  61                                                 $update = true;
  62                                         break;
  63                                 case 1:
  64                                 default:
  65                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 hour"))
  66                                                 $update = true;
  67                                         break;
  68                         }
  69                         if(! $update)
  70                                 continue;
  71                 }
  72
  73                 $importer_uid = $contact['uid'];
  74
  75                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
  76                         intval($importer_uid)
  77                 );
  78                 if(! count($r))
  79                         continue;
  80
  81                 $importer = $r[0];
  82
  83                 if($debugging)
  84                         echo "IMPORTER: {$importer['name']}\n";
  85
  86                 $last_update = (($contact['last-update'] === '0000-00-00 00:00:00')
  87                         ? datetime_convert('UTC','UTC','now - 30 days', ATOM_TIME)
  88                         : datetime_convert('UTC','UTC',$contact['last-update'], ATOM_TIME)
  89                 );
  90
  91                 $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
  92
  93                 if(intval($contact['duplex']) && $contact['dfrn-id'])
  94                         $idtosend = '0:' . $orig_id;
  95                 if(intval($contact['duplex']) && $contact['issued-id'])
  96                         $idtosend = '1:' . $orig_id;
  97
  98                 $url = $contact['poll'] . '?dfrn_id=' . $idtosend
  99                         . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 100                         . '&type=data&last_update=' . $last_update ;
 101
 102                 $xml = fetch_url($url);
 103
 104                 if($debugging) {
 105                         echo "URL: " . $url . "\n";
 106                         echo "XML: " . $xml . "\n";
 107                 }
 108
 109                 if(! $xml) {
 110                         // dead connection - might be a transient event, or this might
 111                         // mean the software was uninstalled or the domain expired.
 112                         // Will keep trying for one month.
 113                         mark_for_death($contact);
 114                         continue;
 115                 }
 116
 117
 118                 $res = simplexml_load_string($xml);
 119
 120                 if(intval($res->status) == 1) {
 121                         // we may not be friends anymore. Will keep trying for one month.
 122                         mark_for_death($contact);
 123                 }
 124                 else {
 125                         if($contact['term-date'] != '0000-00-00 00:00:00')
 126                                 unmark_for_death($contact);
 127                 }
 128
 129                 if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 130                         continue;
 131
 132                 $postvars = array();
 133
 134                 $sent_dfrn_id = hex2bin($res->dfrn_id);
 135                 $challenge    = hex2bin($res->challenge);
 136
 137                 $final_dfrn_id = '';
 138
 139                 if(($contact['duplex']) && strlen($contact['prvkey'])) {
 140                         openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 141                         openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 142
 143                 }
 144                 else {
 145                         openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 146                         openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 147                 }
 148
 149                 $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 150
 151                 if(strpos($final_dfrn_id,':') == 1)
 152                         $final_dfrn_id = substr($final_dfrn_id,2);
 153
 154                 if($final_dfrn_id != $orig_id) {
 155
 156                         // did not decode properly - cannot trust this site
 157                         continue;
 158                 }
 159
 160                 $postvars['dfrn_id'] = $idtosend;
 161                 $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 162
 163                 $xml = post_url($contact['poll'],$postvars);
 164
 165                 if($debugging) {
 166                         echo "XML response:" . $xml . "\n";
 167                         echo "Length:" . strlen($xml) . "\n";
 168                 }
 169
 170                 if(! strlen($xml))
 171                         continue;
 172
 173
 174                 consume_feed($xml,$importer,$contact,$hub);
 175
 176
 177                 if((strlen($hub)) && ($contact['rel'] == REL_BUD) && ($contact['priority'] == 0)) {
 178                         $hubs = explode(',', $hub);
 179                         if(count($hubs)) {
 180                                 foreach($hubs as $h) {
 181                                         $h = trim($h);
 182                                         if(! strlen($h))
 183                                                 continue;
 184                                         subscribe_to_hub($h,$importer,$contact);
 185                                 }
 186                         }
 187                 }
 188
 189
 190                 $r = q("UPDATE `contact` SET `last-update` = '%s' WHERE `id` = %d LIMIT 1",
 191                         dbesc(datetime_convert()),
 192                         intval($contact['id'])
 193                 );
 194
 195         }
 196
 197         killme();
 198
 199
 200