Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
require_once('boot.php');
$a = new App;
@include('.htconfig.php');
require_once('dba.php');
$db = new dba($db_host, $db_user, $db_pass, $db_data);
unset($db_host, $db_user, $db_pass, $db_data);
require_once('session.php');
require_once('datetime.php');
require_once('simplepie/simplepie.inc');
require_once('include/items.php');
require_once('include/Contact.php');
$debugging = get_config('system','debugging');
$a->set_baseurl(get_config('system','url'));
// 'stat' clause is a temporary measure until we have federation subscriptions working both directions
$contacts = q("SELECT * FROM `contact`
WHERE ( ( `network` = 'dfrn' AND ( `dfrn-id` != '' OR (`issued-id` != '' AND `duplex` = 1)))
OR ( `network` = 'stat' AND `poll` != '' ) )
AND `self` = 0 AND `blocked` = 0 AND `readonly` = 0 ORDER BY RAND()");
if(! count($contacts))
killme();
foreach($contacts as $contact) {
if($contact['priority'] || $contact['subhub']) {
$update = false;
// We should be getting everything via a hub. But just to be sure, let's check once a day.
// This also lets us update our subscription to the hub, and add or replace hubs in case it
// changed.
if($contact['subhub'])
$contact['priority'] = 3;
$t = $contact['last-update'];
switch ($contact['priority']) {
case 5:
if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 month"))
$update = true;
break;
case 4:
if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 week"))
$update = true;
break;
case 3:
if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 day"))
$update = true;
break;
case 2:
if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 12 hour"))
$update = true;
break;
case 1:
default:
if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 hour"))
$update = true;
break;
}
if(! $update)
continue;
}
$importer_uid = $contact['uid'];
$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
intval($importer_uid)
);
if(! count($r))
continue;
$importer = $r[0];
if($debugging)
echo "IMPORTER: {$importer['name']}\n";
$last_update = (($contact['last-update'] === '0000-00-00 00:00:00')
? datetime_convert('UTC','UTC','now - 30 days', ATOM_TIME)
: datetime_convert('UTC','UTC',$contact['last-update'], ATOM_TIME)
);
if($contact['network'] === 'dfrn') {
$idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
if(intval($contact['duplex']) && $contact['dfrn-id'])
$idtosend = '0:' . $orig_id;
if(intval($contact['duplex']) && $contact['issued-id'])
$idtosend = '1:' . $orig_id;
$url = $contact['poll'] . '?dfrn_id=' . $idtosend
. '&dfrn_version=' . DFRN_PROTOCOL_VERSION
. '&type=data&last_update=' . $last_update ;
$xml = fetch_url($url);
if($debugging) {
echo "URL: " . $url . "\n";
echo "XML: " . $xml . "\n";
}
if(! $xml) {
// dead connection - might be a transient event, or this might
// mean the software was uninstalled or the domain expired.
// Will keep trying for one month.
mark_for_death($contact);
continue;
}
$res = simplexml_load_string($xml);
if(intval($res->status) == 1) {
// we may not be friends anymore. Will keep trying for one month.
mark_for_death($contact);
}
else {
if($contact['term-date'] != '0000-00-00 00:00:00')
unmark_for_death($contact);
}
if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
continue;
$postvars = array();
$sent_dfrn_id = hex2bin($res->dfrn_id);
$challenge = hex2bin($res->challenge);
$final_dfrn_id = '';
if(($contact['duplex']) && strlen($contact['prvkey'])) {
openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
}
else {
openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
}
$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
if(strpos($final_dfrn_id,':') == 1)
$final_dfrn_id = substr($final_dfrn_id,2);
if($final_dfrn_id != $orig_id) {
// did not decode properly - cannot trust this site
continue;
}
$postvars['dfrn_id'] = $idtosend;
$postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
$xml = post_url($contact['poll'],$postvars);
}
else {
// $contact['network'] !== 'dfrn'
$xml = fetch_url($contact['poll']);
}
if($debugging) {
echo "XML response:" . $xml . "\n";
echo "Length:" . strlen($xml) . "\n";
}
if(! strlen($xml))
continue;
consume_feed($xml,$importer,$contact,$hub);
if((strlen($hub)) && (($contact['rel'] == REL_BUD) || (($contact['network'] === 'stat') && (! $contact['readonly']))) && ($contact['priority'] == 0)) {
$hubs = explode(',', $hub);
if(count($hubs)) {
foreach($hubs as $h) {
$h = trim($h);
if(! strlen($h))
continue;
subscribe_to_hub($h,$importer,$contact);
}
}
}
$r = q("UPDATE `contact` SET `last-update` = '%s' WHERE `id` = %d LIMIT 1",
dbesc(datetime_convert()),
intval($contact['id'])
);
// loop - next contact
}
killme();