80 lines
2.4 KiB
PHP
80 lines
2.4 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @license AGPL-3.0
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*
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* This code 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, version 3,
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* as published by the Free Software Foundation.
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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, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\DAV\Connector\Sabre;
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use OCP\IConfig;
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use Sabre\HTTP\RequestInterface;
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use Sabre\DAV\ServerPlugin;
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/**
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* Class BlockLegacyClientPlugin is used to detect old legacy sync clients and
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* returns a 403 status to those clients
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*
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* @package OCA\DAV\Connector\Sabre
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*/
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class BlockLegacyClientPlugin extends ServerPlugin {
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/** @var \Sabre\DAV\Server */
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protected $server;
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/** @var IConfig */
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protected $config;
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/**
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* @param IConfig $config
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*/
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public function __construct(IConfig $config) {
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$this->config = $config;
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}
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/**
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* @param \Sabre\DAV\Server $server
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* @return void
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*/
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public function initialize(\Sabre\DAV\Server $server) {
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$this->server = $server;
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$this->server->on('beforeMethod', [$this, 'beforeHandler'], 200);
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}
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/**
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* Detects all unsupported clients and throws a \Sabre\DAV\Exception\Forbidden
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* exception which will result in a 403 to them.
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* @param RequestInterface $request
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* @throws \Sabre\DAV\Exception\Forbidden If the client version is not supported
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*/
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public function beforeHandler(RequestInterface $request) {
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$userAgent = $request->getHeader('User-Agent');
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if($userAgent === null) {
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return;
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}
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$minimumSupportedDesktopVersion = $this->config->getSystemValue('minimum.supported.desktop.version', '2.0.0');
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// Match on the mirall version which is in scheme "Mozilla/5.0 (%1) mirall/%2" or
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// "mirall/%1" for older releases
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preg_match("/(?:mirall\\/)([\d.]+)/i", $userAgent, $versionMatches);
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if(isset($versionMatches[1]) &&
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version_compare($versionMatches[1], $minimumSupportedDesktopVersion) === -1) {
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throw new \Sabre\DAV\Exception\Forbidden('Unsupported client version.');
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}
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}
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}
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