nextcloud/apps/files_sharing/lib/middleware/sharingcheckmiddleware.php

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<?php
/**
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* @author Lukas Reschke <lukas@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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;
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use OCP\App\IAppManager;
use OCP\AppFramework\Middleware;
use OCP\AppFramework\Http\TemplateResponse;
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use OCP\IConfig;
/**
* Checks whether the "sharing check" is enabled
*
* @package OCA\Files_Sharing\Middleware
*/
class SharingCheckMiddleware extends Middleware {
/** @var string */
protected $appName;
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/** @var IConfig */
protected $config;
/** @var IAppManager */
protected $appManager;
/***
* @param string $appName
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* @param IConfig $config
* @param IAppManager $appManager
*/
public function __construct($appName,
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IConfig $config,
IAppManager $appManager) {
$this->appName = $appName;
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$this->config = $config;
$this->appManager = $appManager;
}
/**
* Check if sharing is enabled before the controllers is executed
*/
public function beforeController($controller, $methodName) {
if(!$this->isSharingEnabled()) {
throw new \Exception('Sharing is disabled.');
}
}
/**
* Return 404 page in case of an exception
* @param \OCP\AppFramework\Controller $controller
* @param string $methodName
* @param \Exception $exception
* @return TemplateResponse
*/
public function afterException($controller, $methodName, \Exception $exception){
return new TemplateResponse('core', '404', array(), 'guest');
}
/**
* Check whether sharing is enabled
* @return bool
*/
private function isSharingEnabled() {
// FIXME: This check is done here since the route is globally defined and not inside the files_sharing app
// Check whether the sharing application is enabled
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if(!$this->appManager->isEnabledForUser($this->appName)) {
return false;
}
// Check whether public sharing is enabled
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if($this->config->getAppValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
return false;
}
return true;
}
}