nextcloud/lib/private/AppFramework/Middleware/Security/FeaturePolicyMiddleware.php

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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Roeland Jago Douma <roeland@famdouma.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 OC\AppFramework\Middleware\Security;
use OC\Security\FeaturePolicy\FeaturePolicy;
use OC\Security\FeaturePolicy\FeaturePolicyManager;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\EmptyFeaturePolicy;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Middleware;
class FeaturePolicyMiddleware extends Middleware {
/** @var FeaturePolicyManager */
private $policyManager;
public function __construct(FeaturePolicyManager $policyManager) {
$this->policyManager = $policyManager;
}
/**
* Performs the default FeaturePolicy modifications that may be injected by other
* applications
*
* @param Controller $controller
* @param string $methodName
* @param Response $response
* @return Response
*/
public function afterController($controller, $methodName, Response $response): Response {
$policy = !is_null($response->getFeaturePolicy()) ? $response->getFeaturePolicy() : new FeaturePolicy();
if (get_class($policy) === EmptyFeaturePolicy::class) {
return $response;
}
$defaultPolicy = $this->policyManager->getDefaultPolicy();
$defaultPolicy = $this->policyManager->mergePolicies($defaultPolicy, $policy);
$response->setFeaturePolicy($defaultPolicy);
return $response;
}
}