<?php use Friendica\App; use Friendica\Database\DBM; use Friendica\Protocol\OStatus; require_once('include/security.php'); require_once('include/items.php'); function hub_return($valid, $body) { if ($valid) { header($_SERVER["SERVER_PROTOCOL"] . ' 200 OK'); echo $body; } else { header($_SERVER["SERVER_PROTOCOL"] . ' 404 Not Found'); } killme(); } // when receiving an XML feed, always return OK function hub_post_return() { header($_SERVER["SERVER_PROTOCOL"] . ' 200 OK'); killme(); } function pubsub_init(App $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') { $hub_mode = notags(trim(defaults($_GET, 'hub_mode', ''))); $hub_topic = notags(trim(defaults($_GET, 'hub_topic', ''))); $hub_challenge = notags(trim(defaults($_GET, 'hub_challenge', ''))); $hub_lease = notags(trim(defaults($_GET, 'hub_lease_seconds', ''))); $hub_verify = notags(trim(defaults($_GET, 'hub_verify_token', ''))); logger('Subscription from ' . $_SERVER['REMOTE_ADDR'] . ' Mode: ' . $hub_mode . ' Nick: ' . $nick); logger('Data: ' . print_r($_GET,true), LOGGER_DATA); $subscribe = (($hub_mode === 'subscribe') ? 1 : 0); $owner = dba::selectFirst('user', ['uid'], ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false]); if (!DBM::is_result($owner)) { logger('Local account not found: ' . $nick); hub_return(false, ''); } $condition = ['uid' => $owner['uid'], 'id' => $contact_id, 'blocked' => false, 'pending' => false]; if (!empty($hub_verify)) { $condition['hub-verify'] = $hub_verify; } $contact = dba::selectFirst('contact', ['id', 'poll'], $condition); if (!DBM::is_result($contact)) { logger('Contact ' . $contact_id . ' not found.'); hub_return(false, ''); } if (!empty($hub_topic) && !link_compare($hub_topic, $contact['poll'])) { logger('Hub topic ' . $hub_topic . ' != ' . $contact['poll']); hub_return(false, ''); } // We must initiate an unsubscribe request with a verify_token. // Don't allow outsiders to unsubscribe us. if (($hub_mode === 'unsubscribe') && empty($hub_verify)) { logger('Bogus unsubscribe'); hub_return(false, ''); } if (!empty($hub_mode)) { dba::update('contact', ['subhub' => $subscribe], ['id' => $contact['id']]); logger($hub_mode . ' success for contact ' . $contact_id . '.'); } hub_return(true, $hub_challenge); } } function pubsub_post(App $a) { $xml = file_get_contents('php://input'); logger('Feed arrived from ' . $_SERVER['REMOTE_ADDR'] . ' for ' . $a->cmd . ' with user-agent: ' . $_SERVER['HTTP_USER_AGENT']); logger('Data: ' . $xml, LOGGER_DATA); $nick = (($a->argc > 1) ? notags(trim($a->argv[1])) : ''); $contact_id = (($a->argc > 2) ? intval($a->argv[2]) : 0 ); $importer = dba::selectFirst('user', [], ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false]); if (!DBM::is_result($importer)) { hub_post_return(); } $condition = ['id' => $contact_id, 'uid' => $importer['uid'], 'subhub' => true, 'blocked' => false]; $contact = dba::selectFirst('contact', [], $condition); if (!DBM::is_result($contact)) { $author = OStatus::salmonAuthor($xml, $importer); if (!empty($author['contact-id'])) { $condition = ['id' => $author['contact-id'], 'uid' => $importer['uid'], 'subhub' => true, 'blocked' => false]; $contact = dba::selectFirst('contact', [], $condition); logger('No record for ' . $nick .' with contact id ' . $contact_id . ' - using '.$author['contact-id'].' instead.'); } if (!DBM::is_result($contact)) { logger('Contact ' . $author["author-link"] . ' (' . $contact_id . ') for user ' . $nick . " wasn't found - ignored. XML: " . $xml); hub_post_return(); } } if (!in_array($contact['rel'], [CONTACT_IS_SHARING, CONTACT_IS_FRIEND]) && ($contact['network'] != NETWORK_FEED)) { logger('Contact ' . $contact['id'] . ' is not expected to share with us - ignored.'); hub_post_return(); } // We import feeds from OStatus, Friendica and ATOM/RSS. /// @todo Check if Friendica posts really arrive here - otherwise we can discard some stuff if (!in_array($contact['network'], [NETWORK_OSTATUS, NETWORK_DFRN, NETWORK_FEED])) { hub_post_return(); } logger('Import item for ' . $nick . ' from ' . $contact['nick'] . ' (' . $contact['id'] . ')'); $feedhub = ''; consume_feed($xml, $importer, $contact, $feedhub); // do it a second time for DFRN so that any children find their parents. if ($contact['network'] === NETWORK_DFRN) { consume_feed($xml, $importer, $contact, $feedhub); } hub_post_return(); }