friendica/src/Module/Diaspora/Receive.php

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<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Module\Diaspora;
use Friendica\BaseModule;
use Friendica\DI;
use Friendica\Model\User;
use Friendica\Network\HTTPException;
use Friendica\Protocol\Diaspora;
use Friendica\Util\Network;
use Psr\Log\LoggerInterface;
/**
* This module is part of the Diaspora protocol.
* It is used for receiving single posts either for public or for a specific user.
*/
class Receive extends BaseModule
{
/** @var LoggerInterface */
private static $logger;
public static function init(array $parameters = [])
{
self::$logger = DI::logger();
}
public static function post(array $parameters = [])
{
$enabled = DI::config()->get('system', 'diaspora_enabled', false);
if (!$enabled) {
self::$logger->info('Diaspora disabled.');
throw new HTTPException\ForbiddenException(DI::l10n()->t('Access denied.'));
}
if ($parameters['type'] === 'public') {
self::receivePublic();
} else if ($parameters['type'] === 'users') {
self::receiveUser($parameters['guid']);
}
}
/**
* Receive a public Diaspora posting
*
* @throws HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receivePublic()
{
self::$logger->info('Diaspora: Receiving post.');
$msg = self::decodePost();
self::$logger->info('Diaspora: Dispatching.');
Diaspora::dispatchPublic($msg);
}
/**
* Receive a Diaspora posting for a user
*
* @param string $guid The GUID of the importer
*
* @throws HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function receiveUser(string $guid)
{
self::$logger->info('Diaspora: Receiving post.');
$importer = User::getByGuid($guid);
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$msg = self::decodePost(false, $importer['prvkey'] ?? '');
self::$logger->info('Diaspora: Dispatching.');
if (Diaspora::dispatch($importer, $msg)) {
throw new HTTPException\OKException();
} else {
throw new HTTPException\InternalServerErrorException();
}
}
/**
* Decodes a Diaspora message based on the posted data
*
* @param string $privKey The private key of the importer
* @param bool $public True, if the post is public
*
* @return array
* @throws HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function decodePost(bool $public = true, string $privKey = '')
{
if (empty($_POST['xml'])) {
$postdata = Network::postdata();
if (empty($postdata)) {
throw new HTTPException\InternalServerErrorException('Missing postdata.');
}
self::$logger->info('Diaspora: Message is in the new format.');
$msg = Diaspora::decodeRaw($postdata, $privKey);
} else {
$xml = urldecode($_POST['xml']);
self::$logger->info('Diaspora: Decode message in the old format.');
$msg = Diaspora::decode($xml, $privKey);
if ($public && !$msg) {
self::$logger->info('Diaspora: Decode message in the new format.');
$msg = Diaspora::decodeRaw($xml, $privKey);
}
}
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self::$logger->info('Diaspora: Post decoded.');
self::$logger->debug('Diaspora: Decoded message.', ['msg' => $msg]);
if (!is_array($msg)) {
throw new HTTPException\InternalServerErrorException('Message is not an array.');
}
return $msg;
}
}