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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\DAV\Connector\Sabre;
use OCP\AppFramework\Http;
use Sabre\DAV\INode;
use Sabre\DAV\Locks\LockInfo;
use Sabre\DAV\PropFind;
use Sabre\DAV\Server;
use Sabre\DAV\ServerPlugin;
use Sabre\DAV\Xml\Property\LockDiscovery;
use Sabre\DAV\Xml\Property\SupportedLock;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
/**
* Class FakeLockerPlugin is a plugin only used when connections come in from
* OS X via Finder. The fake locking plugin does emulate Class 2 WebDAV support
* (locking of files) which allows Finder to access the storage in write mode as
* well.
*
* No real locking is performed, instead the plugin just returns always positive
* responses.
*
* @see https://github.com/owncloud/core/issues/17732
* @package OCA\DAV\Connector\Sabre
*/
class FakeLockerPlugin extends ServerPlugin {
/** @var Server */
private $server;
/** {@inheritDoc} */
public function initialize(Server $server) {
$this->server = $server;
$this->server->on('method:LOCK', [$this, 'fakeLockProvider'], 1);
$this->server->on('method:UNLOCK', [$this, 'fakeUnlockProvider'], 1);
$server->on('propFind', [$this, 'propFind']);
$server->on('validateTokens', [$this, 'validateTokens']);
}
/**
* Indicate that we support LOCK and UNLOCK
*
* @param string $path
* @return string[]
*/
public function getHTTPMethods($path) {
return [
'LOCK',
'UNLOCK',
];
}
/**
* Indicate that we support locking
*
* @return integer[]
*/
public function getFeatures() {
return [2];
}
/**
* Return some dummy response for PROPFIND requests with regard to locking
*
* @param PropFind $propFind
* @param INode $node
* @return void
*/
public function propFind(PropFind $propFind, INode $node) {
$propFind->handle('{DAV:}supportedlock', function () {
return new SupportedLock();
});
$propFind->handle('{DAV:}lockdiscovery', function () use ($propFind) {
return new LockDiscovery([]);
});
}
/**
* Mark a locking token always as valid
*
* @param RequestInterface $request
* @param array $conditions
*/
public function validateTokens(RequestInterface $request, &$conditions) {
foreach ($conditions as &$fileCondition) {
if (isset($fileCondition['tokens'])) {
foreach ($fileCondition['tokens'] as &$token) {
if (isset($token['token'])) {
if (str_starts_with($token['token'], 'opaquelocktoken:')) {
$token['validToken'] = true;
}
}
}
}
}
}
/**
* Fakes a successful LOCK
*
* @param RequestInterface $request
* @param ResponseInterface $response
* @return bool
*/
public function fakeLockProvider(RequestInterface $request,
ResponseInterface $response) {
$lockInfo = new LockInfo();
$lockInfo->token = md5($request->getPath());
$lockInfo->uri = $request->getPath();
$lockInfo->depth = Server::DEPTH_INFINITY;
$lockInfo->timeout = 1800;
$body = $this->server->xml->write('{DAV:}prop', [
'{DAV:}lockdiscovery'
=> new LockDiscovery([$lockInfo])
]);
$response->setStatus(Http::STATUS_OK);
$response->setBody($body);
return false;
}
/**
* Fakes a successful LOCK
*
* @param RequestInterface $request
* @param ResponseInterface $response
* @return bool
*/
public function fakeUnlockProvider(RequestInterface $request,
ResponseInterface $response) {
$response->setStatus(Http::STATUS_NO_CONTENT);
$response->setHeader('Content-Length', '0');
return false;
}
}
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