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<?php
function hub_return($valid,$body) {
if($valid) {
header($_SERVER["SERVER_PROTOCOL"] . ' 200 ' . 'OK');
echo $body;
killme();
}
else {
header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . 'Not Found');
killme();
}
// NOTREACHED
}
// when receiving an XML feed, always return OK
function hub_post_return() {
header($_SERVER["SERVER_PROTOCOL"] . ' 200 ' . 'OK');
killme();
}
function pubsub_init(&$a) {
$nick = (($a->argc > 1) ? notags(trim($a->argv[1])) : '');
$contact_id = (($a->argc > 2) ? intval($a->argv[2]) : 0);
if($_SERVER['REQUEST_METHOD'] === 'GET') {
$hub_mode = notags(trim($_GET['hub.mode']));
$hub_topic = notags(trim($_GET['hub.topic']));
$hub_challenge = notags(trim($_GET['hub.challenge']));
$hub_lease = notags(trim($_GET['hub.lease_seconds']));
$hub_verify = notags(trim($_GET['hub.verify_token']));
$subscribe = (($hub_mode === 'subscribe') ? 1 : 0);
$r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
dbesc($nick)
);
if(! count($r))
hub_return(false, '');
$owner = $r[0];
$sql_extra = ((strlen($hub_verify)) ? sprintf(" AND `hub-verify` = '%s' ", dbesc($hub_verify)) : '');
$r = q("SELECT * FROM `contact` WHERE `poll` = '%s' AND `id` = %d AND `uid` = %d AND `blocked` = 0 $sql_extra LIMIT 1",
dbesc($hub_topic),
intval($contact_id),
intval($owner['uid'])
);
if(! count($r))
hub_return(false, '');
$contact = $r[0];
// We must initiate an unsubscribe request with a verify_token.
// Don't allow outsiders to unsubscribe us.
if(($hub_mode === 'unsubscribe') && (! strlen($hub_verify)))
hub_return(false, '');
$r = q("UPDATE `contact` SET `subhub` = %d WHERE `id` = %d LIMIT 1",
intval($subscribe),
intval($contact['id'])
);
hub_return(true, $hub_challenge);
}
}
function pubsub_post(&$a) {
$xml = file_get_contents('php://input');
$nick = (($a->argc > 1) ? notags(trim($a->argv[1])) : '');
$contact_id = (($a->argc > 2) ? intval($a->argv[2]) : 0);
$r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
dbesc($nick)
);
if(! count($r))
hub_post_return();
$importer = $r[0];
$r = q("SELECT * FROM `contact` WHERE `subhub` = 1 AND `id` = %d AND `uid` = %d AND `blocked` = 0 LIMIT 1",
intval($contact_id),
intval($importer['uid'])
);
if(! count($r))
hub_post_return();
$contact = $r[0];
consume_feed($xml,$importer,$contact);
hub_post_return();
}
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