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         require_once('include/Contact.php');
  18
  19         $debugging = get_config('system','debugging');
  20
  21         $a->set_baseurl(get_config('system','url'));
  22
  23         // 'stat' clause is a temporary measure until we have federation subscriptions working both directions
  24         $contacts = q("SELECT * FROM `contact`
  25                 WHERE ( ( `network` = 'dfrn' AND ( `dfrn-id` != '' OR (`issued-id` != '' AND `duplex` = 1)))
  26                 OR ( `network` = 'stat' AND `poll` != '' ) )
  27                 AND `self` = 0 AND `blocked` = 0 AND `readonly` = 0 ORDER BY RAND()");
  28
  29         if(! count($contacts))
  30                 killme();
  31
  32         foreach($contacts as $contact) {
  33
  34                 if($contact['priority'] || $contact['subhub']) {
  35
  36                         $update = false;
  37
  38                         // We should be getting everything via a hub. But just to be sure, let's check once a day.
  39                         // This also lets us update our subscription to the hub, and add or replace hubs in case it
  40                         // changed.
  41
  42                         if($contact['subhub'])
  43                                 $contact['priority'] = 3;
  44
  45                         $t = $contact['last-update'];
  46
  47                         switch ($contact['priority']) {
  48                                 case 5:
  49                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 month"))
  50                                                 $update = true;
  51                                         break;
  52                                 case 4:
  53                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 week"))
  54                                                 $update = true;
  55                                         break;
  56                                 case 3:
  57                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 day"))
  58                                                 $update = true;
  59                                         break;
  60                                 case 2:
  61                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 12 hour"))
  62                                                 $update = true;
  63                                         break;
  64                                 case 1:
  65                                 default:
  66                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 hour"))
  67                                                 $update = true;
  68                                         break;
  69                         }
  70                         if(! $update)
  71                                 continue;
  72                 }
  73
  74                 $importer_uid = $contact['uid'];
  75
  76                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
  77                         intval($importer_uid)
  78                 );
  79                 if(! count($r))
  80                         continue;
  81
  82                 $importer = $r[0];
  83
  84                 if($debugging)
  85                         echo "IMPORTER: {$importer['name']}\n";
  86
  87                 $last_update = (($contact['last-update'] === '0000-00-00 00:00:00')
  88                         ? datetime_convert('UTC','UTC','now - 30 days', ATOM_TIME)
  89                         : datetime_convert('UTC','UTC',$contact['last-update'], ATOM_TIME)
  90                 );
  91
  92                 if($contact['network'] === 'dfrn') {
  93
  94                         $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
  95
  96                         if(intval($contact['duplex']) && $contact['dfrn-id'])
  97                                 $idtosend = '0:' . $orig_id;
  98                         if(intval($contact['duplex']) && $contact['issued-id'])
  99                                 $idtosend = '1:' . $orig_id;
 100
 101                         $url = $contact['poll'] . '?dfrn_id=' . $idtosend
 102                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 103                                 . '&type=data&last_update=' . $last_update ;
 104
 105                         $xml = fetch_url($url);
 106
 107                         if($debugging) {
 108                                 echo "URL: " . $url . "\n";
 109                                 echo "XML: " . $xml . "\n";
 110                         }
 111
 112                         if(! $xml) {
 113                                 // dead connection - might be a transient event, or this might
 114                                 // mean the software was uninstalled or the domain expired.
 115                                 // Will keep trying for one month.
 116                                 mark_for_death($contact);
 117                                 continue;
 118                         }
 119
 120
 121                         $res = simplexml_load_string($xml);
 122
 123                         if(intval($res->status) == 1) {
 124                                 // we may not be friends anymore. Will keep trying for one month.
 125                                 mark_for_death($contact);
 126                         }
 127                         else {
 128                                 if($contact['term-date'] != '0000-00-00 00:00:00')
 129                                         unmark_for_death($contact);
 130                         }
 131
 132                         if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 133                                 continue;
 134
 135                         $postvars = array();
 136
 137                         $sent_dfrn_id = hex2bin($res->dfrn_id);
 138                         $challenge    = hex2bin($res->challenge);
 139
 140                         $final_dfrn_id = '';
 141
 142                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 143                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 144                                 openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 145                         }
 146                         else {
 147                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 148                                 openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 149                         }
 150
 151                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 152
 153                         if(strpos($final_dfrn_id,':') == 1)
 154                                 $final_dfrn_id = substr($final_dfrn_id,2);
 155
 156                         if($final_dfrn_id != $orig_id) {
 157
 158                                 // did not decode properly - cannot trust this site
 159                                 continue;
 160                         }
 161
 162                         $postvars['dfrn_id'] = $idtosend;
 163                         $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 164
 165                         $xml = post_url($contact['poll'],$postvars);
 166                 }
 167                 else {
 168                         // $contact['network'] !== 'dfrn'
 169
 170                         $xml = fetch_url($contact['poll']);
 171                 }
 172
 173                 if($debugging) {
 174                         echo "XML response:" . $xml . "\n";
 175                         echo "Length:" . strlen($xml) . "\n";
 176                 }
 177
 178                 if(! strlen($xml))
 179                         continue;
 180
 181                 consume_feed($xml,$importer,$contact,$hub);
 182
 183                 if((strlen($hub)) && (($contact['rel'] == REL_BUD) || (($contact['network'] === 'stat') && (! $contact['readonly']))) && ($contact['priority'] == 0)) {
 184                         $hubs = explode(',', $hub);
 185                         if(count($hubs)) {
 186                                 foreach($hubs as $h) {
 187                                         $h = trim($h);
 188                                         if(! strlen($h))
 189                                                 continue;
 190                                         subscribe_to_hub($h,$importer,$contact);
 191                                 }
 192                         }
 193                 }
 194
 195
 196                 $r = q("UPDATE `contact` SET `last-update` = '%s' WHERE `id` = %d LIMIT 1",
 197                         dbesc(datetime_convert()),
 198                         intval($contact['id'])
 199                 );
 200
 201                 // loop - next contact
 202         }
 203
 204         killme();
 205
 206
 207