server/apps/files_sharing/lib/Middleware/SharingCheckMiddleware.php
Lukas Reschke f93a82b8b0
Remove explicit type hints for Controller
This is public API and breaks the middlewares of existing apps. Since this also requires maintaining two different code paths for 12 and 13 I'm at the moment voting for reverting this change.

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>
2017-08-01 17:32:03 +02:00

185 lines
5.2 KiB
PHP

<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\Files_Sharing\Middleware;
use OCA\Files_Sharing\Controller\ExternalSharesController;
use OCA\Files_Sharing\Controller\ShareController;
use OCP\App\IAppManager;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\NotFoundResponse;
use OCP\AppFramework\Middleware;
use OCP\Files\NotFoundException;
use OCP\IConfig;
use OCP\AppFramework\Utility\IControllerMethodReflector;
use OCA\Files_Sharing\Exceptions\S2SException;
use OCP\AppFramework\Http\JSONResponse;
use OCP\IRequest;
use OCP\Share\IManager;
use OCP\Share\Exceptions\ShareNotFound;
/**
* Checks whether the "sharing check" is enabled
*
* @package OCA\Files_Sharing\Middleware
*/
class SharingCheckMiddleware extends Middleware {
/** @var string */
protected $appName;
/** @var IConfig */
protected $config;
/** @var IAppManager */
protected $appManager;
/** @var IControllerMethodReflector */
protected $reflector;
/** @var IManager */
protected $shareManager;
/** @var IRequest */
protected $request;
/***
* @param string $appName
* @param IConfig $config
* @param IAppManager $appManager
* @param IControllerMethodReflector $reflector
* @param IManager $shareManager
* @param IRequest $request
*/
public function __construct($appName,
IConfig $config,
IAppManager $appManager,
IControllerMethodReflector $reflector,
IManager $shareManager,
IRequest $request
) {
$this->appName = $appName;
$this->config = $config;
$this->appManager = $appManager;
$this->reflector = $reflector;
$this->shareManager = $shareManager;
$this->request = $request;
}
/**
* Check if sharing is enabled before the controllers is executed
*
* @param Controller $controller
* @param string $methodName
* @throws NotFoundException
* @throws S2SException
* @throws ShareNotFound
*/
public function beforeController($controller, $methodName) {
if(!$this->isSharingEnabled()) {
throw new NotFoundException('Sharing is disabled.');
}
if ($controller instanceof ExternalSharesController &&
!$this->externalSharesChecks()) {
throw new S2SException('Federated sharing not allowed');
} else if ($controller instanceof ShareController) {
$token = $this->request->getParam('token');
$share = $this->shareManager->getShareByToken($token);
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK
&& !$this->isLinkSharingEnabled()) {
throw new NotFoundException('Link sharing is disabled');
}
}
}
/**
* Return 404 page in case of a not found exception
*
* @param Controller $controller
* @param string $methodName
* @param \Exception $exception
* @return NotFoundResponse
* @throws \Exception
*/
public function afterException($controller, $methodName, \Exception $exception) {
if(is_a($exception, '\OCP\Files\NotFoundException')) {
return new NotFoundResponse();
}
if (is_a($exception, '\OCA\Files_Sharing\Exceptions\S2SException')) {
return new JSONResponse($exception->getMessage(), 405);
}
throw $exception;
}
/**
* Checks for externalshares controller
* @return bool
*/
private function externalSharesChecks() {
if (!$this->reflector->hasAnnotation('NoIncomingFederatedSharingRequired') &&
$this->config->getAppValue('files_sharing', 'incoming_server2server_share_enabled', 'yes') !== 'yes') {
return false;
}
if (!$this->reflector->hasAnnotation('NoOutgoingFederatedSharingRequired') &&
$this->config->getAppValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes') !== 'yes') {
return false;
}
return true;
}
/**
* Check whether sharing is enabled
* @return bool
*/
private function isSharingEnabled() {
// FIXME: This check is done here since the route is globally defined and not inside the files_sharing app
// Check whether the sharing application is enabled
if(!$this->appManager->isEnabledForUser($this->appName)) {
return false;
}
return true;
}
/**
* Check if link sharing is allowed
* @return bool
*/
private function isLinkSharingEnabled() {
// Check if the shareAPI is enabled
if ($this->config->getAppValue('core', 'shareapi_enabled', 'yes') !== 'yes') {
return false;
}
// Check whether public sharing is enabled
if($this->config->getAppValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
return false;
}
return true;
}
}