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<?php
/**
* @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
*
* @author Bastien Durel <bastien@durel.org>
* @author Julius Härtl <jus@bitgrid.net>
* @author Robin Appelman <robin@icewind.nl>
*
* @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 <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\DAV\Connector\Sabre;
use Sabre\DAV\CorePlugin;
use Sabre\DAV\FS\Directory;
use Sabre\DAV\ServerPlugin;
use Sabre\DAV\Tree;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
class AnonymousOptionsPlugin extends ServerPlugin {
/**
* @var \Sabre\DAV\Server
*/
private $server;
/**
* @param \Sabre\DAV\Server $server
* @return void
*/
public function initialize(\Sabre\DAV\Server $server) {
$this->server = $server;
// before auth
$this->server->on('beforeMethod:*', [$this, 'handleAnonymousOptions'], 9);
}
/**
* @return bool
*/
public function isRequestInRoot($path) {
return $path === '' || (is_string($path) && strpos($path, '/') === false);
}
/**
* @throws \Sabre\DAV\Exception\Forbidden
* @return bool
*/
public function handleAnonymousOptions(RequestInterface $request, ResponseInterface $response) {
$isOffice = preg_match('/Microsoft Office/i', $request->getHeader('User-Agent'));
$emptyAuth = $request->getHeader('Authorization') === null
|| $request->getHeader('Authorization') === ''
|| trim($request->getHeader('Authorization')) === 'Bearer';
$isAnonymousOption = $request->getMethod() === 'OPTIONS' && $emptyAuth;
$isOfficeHead = $request->getMethod() === 'HEAD' && $isOffice && $emptyAuth;
if ($isAnonymousOption || $isOfficeHead) {
/** @var CorePlugin $corePlugin */
$corePlugin = $this->server->getPlugin('core');
// setup a fake tree for anonymous access
$this->server->tree = new Tree(new Directory(''));
$corePlugin->httpOptions($request, $response);
$this->server->emit('afterMethod', [$request, $response]);
$this->server->emit('afterMethod:OPTIONS', [$request, $response]);
$this->server->sapi->sendResponse($response);
return false;
}
}
}
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