Remove mod/pubsubhubbub.php file
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Hypolite Petovan
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<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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use Friendica\App;
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use Friendica\Core\Logger;
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use Friendica\Core\System;
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use Friendica\Database\DBA;
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use Friendica\DI;
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use Friendica\Model\PushSubscriber;
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use Friendica\Util\Strings;
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function pubsubhubbub_init(App $a) {
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// PuSH subscription must be considered "public" so just block it
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// if public access isn't enabled.
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if (DI::config()->get('system', 'block_public')) {
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throw new \Friendica\Network\HTTPException\ForbiddenException();
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}
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// Subscription request from subscriber
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// https://pubsubhubbub.googlecode.com/git/pubsubhubbub-core-0.4.html#anchor4
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// Example from GNU Social:
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// [hub_mode] => subscribe
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// [hub_callback] => http://status.local/main/push/callback/1
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// [hub_verify] => sync
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// [hub_verify_token] => af11...
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// [hub_secret] => af11...
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// [hub_topic] => http://friendica.local/dfrn_poll/sazius
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if (DI::args()->getMethod() === App\Router::POST) {
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$hub_mode = $_POST['hub_mode'] ?? '';
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$hub_callback = $_POST['hub_callback'] ?? '';
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$hub_verify_token = $_POST['hub_verify_token'] ?? '';
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$hub_secret = $_POST['hub_secret'] ?? '';
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$hub_topic = $_POST['hub_topic'] ?? '';
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// check for valid hub_mode
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if ($hub_mode === 'subscribe') {
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$subscribe = 1;
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} elseif ($hub_mode === 'unsubscribe') {
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$subscribe = 0;
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} else {
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Logger::notice("Invalid hub_mode=$hub_mode, ignoring.");
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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Logger::info("$hub_mode request from " . $_SERVER['REMOTE_ADDR']);
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if (DI::args()->getArgc() > 1) {
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// Normally the url should now contain the nick name as last part of the url
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$nick = DI::args()->getArgv()[1];
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} else {
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// Get the nick name from the topic as a fallback
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$nick = $hub_topic;
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}
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// Extract nick name and strip any .atom extension
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$nick = basename($nick, '.atom');
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if (!$nick) {
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Logger::notice('Bad hub_topic=$hub_topic, ignoring.');
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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// fetch user from database given the nickname
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$condition = ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false];
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$owner = DBA::selectFirst('user', ['uid', 'nickname'], $condition);
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if (!DBA::isResult($owner)) {
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Logger::notice('Local account not found: ' . $nick . ' - topic: ' . $hub_topic . ' - callback: ' . $hub_callback);
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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// get corresponding row from contact table
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$condition = ['uid' => $owner['uid'], 'blocked' => false,
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'pending' => false, 'self' => true];
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$contact = DBA::selectFirst('contact', ['poll'], $condition);
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if (!DBA::isResult($contact)) {
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Logger::notice('Self contact for user ' . $owner['uid'] . ' not found.');
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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// sanity check that topic URLs are the same
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$hub_topic2 = str_replace('/feed/', '/dfrn_poll/', $hub_topic);
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$self = DI::baseUrl() . '/api/statuses/user_timeline/' . $owner['nickname'] . '.atom';
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if (!Strings::compareLink($hub_topic, $contact['poll']) && !Strings::compareLink($hub_topic2, $contact['poll']) && !Strings::compareLink($hub_topic, $self)) {
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Logger::notice('Hub topic ' . $hub_topic . ' != ' . $contact['poll']);
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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// do subscriber verification according to the PuSH protocol
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$hub_challenge = Strings::getRandomHex(40);
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$params = http_build_query([
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'hub.mode' => $subscribe == 1 ? 'subscribe' : 'unsubscribe',
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'hub.topic' => $hub_topic,
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'hub.challenge' => $hub_challenge,
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'hub.verify_token' => $hub_verify_token,
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// lease time is hard coded to one week (in seconds)
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// we don't actually enforce the lease time because GNU
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// Social/StatusNet doesn't honour it (yet)
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'hub.lease_seconds' => 604800,
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]);
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$hub_callback = rtrim($hub_callback, ' ?&#');
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$separator = parse_url($hub_callback, PHP_URL_QUERY) === null ? '?' : '&';
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$fetchResult = DI::httpClient()->fetchFull($hub_callback . $separator . $params);
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$body = $fetchResult->getBody();
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$ret = $fetchResult->getReturnCode();
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// give up if the HTTP return code wasn't a success (2xx)
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if ($ret < 200 || $ret > 299) {
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Logger::notice("Subscriber verification for $hub_topic at $hub_callback returned $ret, ignoring.");
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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// check that the correct hub_challenge code was echoed back
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if (trim($body) !== $hub_challenge) {
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Logger::notice("Subscriber did not echo back hub.challenge, ignoring.");
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Logger::notice("\"$hub_challenge\" != \"".trim($body)."\"");
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throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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PushSubscriber::renew($owner['uid'], $nick, $subscribe, $hub_callback, $hub_topic, $hub_secret);
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throw new \Friendica\Network\HTTPException\AcceptedException();
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}
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System::exit();
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}
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