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         $a->set_baseurl(get_config('system','url'));
  20
  21         $force = false;
  22         if(($argc > 1) && ($argv[1] == 'force'))
  23                 $force = true;
  24
  25         // 'stat' clause is a temporary measure until we have federation subscriptions working both directions
  26         $contacts = q("SELECT * FROM `contact`
  27                 WHERE ( ( `network` = 'dfrn' AND ( `dfrn-id` != '' OR (`issued-id` != '' AND `duplex` = 1)))
  28                 OR ( `network` = 'stat' AND `poll` != '' ) )
  29                 AND `self` = 0 AND `blocked` = 0 AND `readonly` = 0 ORDER BY RAND()");
  30
  31         if(! count($contacts))
  32                 killme();
  33
  34         foreach($contacts as $contact) {
  35
  36                 if($contact['priority'] || $contact['subhub']) {
  37
  38                         $update = false;
  39
  40                         // We should be getting everything via a hub. But just to be sure, let's check once a day.
  41                         // This also lets us update our subscription to the hub, and add or replace hubs in case it
  42                         // changed.
  43
  44                         if($contact['subhub'])
  45                                 $contact['priority'] = 3;
  46
  47                         $t = $contact['last-update'];
  48
  49                         switch ($contact['priority']) {
  50                                 case 5:
  51                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 month"))
  52                                                 $update = true;
  53                                         break;
  54                                 case 4:
  55                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 week"))
  56                                                 $update = true;
  57                                         break;
  58                                 case 3:
  59                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 day"))
  60                                                 $update = true;
  61                                         break;
  62                                 case 2:
  63                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 12 hour"))
  64                                                 $update = true;
  65                                         break;
  66                                 case 1:
  67                                 default:
  68                                         if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 hour"))
  69                                                 $update = true;
  70                                         break;
  71                         }
  72                         if((! $update) && (! $force))
  73                                 continue;
  74                 }
  75
  76                 $importer_uid = $contact['uid'];
  77
  78                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
  79                         intval($importer_uid)
  80                 );
  81                 if(! count($r))
  82                         continue;
  83
  84                 $importer = $r[0];
  85
  86                 logger("poller: poll: IMPORTER: {$importer['name']}, CONTACT: {$contact['name']}");
  87
  88                 $last_update = (($contact['last-update'] === '0000-00-00 00:00:00')
  89                         ? datetime_convert('UTC','UTC','now - 30 days', ATOM_TIME)
  90                         : datetime_convert('UTC','UTC',$contact['last-update'], ATOM_TIME)
  91                 );
  92
  93                 if($contact['network'] === 'dfrn') {
  94
  95                         $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
  96
  97                         if(intval($contact['duplex']) && $contact['dfrn-id'])
  98                                 $idtosend = '0:' . $orig_id;
  99                         if(intval($contact['duplex']) && $contact['issued-id'])
 100                                 $idtosend = '1:' . $orig_id;
 101
 102                         $url = $contact['poll'] . '?dfrn_id=' . $idtosend
 103                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 104                                 . '&type=data&last_update=' . $last_update ;
 105
 106                         $xml = fetch_url($url);
 107
 108                         logger('poller: handshake with url ' . $url . ' returns xml: ' . $xml, LOGGER_DATA);
 109
 110                         if(! $xml) {
 111                                 logger("poller: $url appears to be dead - marking for death ");
 112                                 // dead connection - might be a transient event, or this might
 113                                 // mean the software was uninstalled or the domain expired.
 114                                 // Will keep trying for one month.
 115                                 mark_for_death($contact);
 116                                 continue;
 117                         }
 118
 119
 120                         $res = simplexml_load_string($xml);
 121
 122                         if(intval($res->status) == 1) {
 123                                 logger("poller: $url replied status 1 - marking for death ");
 124                                 // we may not be friends anymore. Will keep trying for one month.
 125                                 mark_for_death($contact);
 126                         }
 127                         else {
 128                                 if($contact['term-date'] != '0000-00-00 00:00:00') {
 129                                         logger("poller: $url back from the dead - removing mark for death");
 130                                         unmark_for_death($contact);
 131                                 }
 132                         }
 133
 134                         if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 135                                 continue;
 136
 137                         $postvars = array();
 138
 139                         $sent_dfrn_id = hex2bin($res->dfrn_id);
 140                         $challenge    = hex2bin($res->challenge);
 141
 142                         $final_dfrn_id = '';
 143
 144                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 145                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 146                                 openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 147                         }
 148                         else {
 149                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 150                                 openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 151                         }
 152
 153                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 154
 155                         if(strpos($final_dfrn_id,':') == 1)
 156                                 $final_dfrn_id = substr($final_dfrn_id,2);
 157
 158                         if($final_dfrn_id != $orig_id) {
 159
 160                                 // did not decode properly - cannot trust this site
 161                                 continue;
 162                         }
 163
 164                         $postvars['dfrn_id'] = $idtosend;
 165                         $postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 166
 167                         $xml = post_url($contact['poll'],$postvars);
 168                 }
 169                 else {
 170                         // $contact['network'] !== 'dfrn'
 171
 172                         $xml = fetch_url($contact['poll']);
 173                 }
 174
 175                 logger('poller: received xml : ' . $xml, LOGGER_DATA);
 176
 177                 if(! strlen($xml))
 178                         continue;
 179
 180                 consume_feed($xml,$importer,$contact,$hub);
 181
 182                 // do it twice. Ensures that children of parents which may be later in the stream aren't tossed
 183
 184                 consume_feed($xml,$importer,$contact,$hub);
 185
 186
 187                 if((strlen($hub)) && (($contact['rel'] == REL_BUD) || (($contact['network'] === 'stat') && (! $contact['readonly'])))) {
 188                         logger('poller: subscribing to hub(s) : ' . $hub . ' contact name : ' . $contact['name'] . ' local user : ' . $importer['name']);
 189                         $hubs = explode(',', $hub);
 190                         if(count($hubs)) {
 191                                 foreach($hubs as $h) {
 192                                         $h = trim($h);
 193                                         if(! strlen($h))
 194                                                 continue;
 195                                         subscribe_to_hub($h,$importer,$contact);
 196                                 }
 197                         }
 198                 }
 199
 200
 201                 $r = q("UPDATE `contact` SET `last-update` = '%s' WHERE `id` = %d LIMIT 1",
 202                         dbesc(datetime_convert()),
 203                         intval($contact['id'])
 204                 );
 205
 206                 // loop - next contact
 207         }
 208
 209         killme();
 210
 211
 212