2014-05-08 13:47:18 +04:00
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<?php
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/**
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* ownCloud - App Framework
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*
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* This file is licensed under the Affero General Public License version 3 or
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* later. See the COPYING file.
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*
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* @author Bernhard Posselt <dev@bernhard-posselt.com>
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* @copyright Bernhard Posselt 2014
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*/
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namespace OC\AppFramework\Middleware\Security;
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use OC\AppFramework\Utility\MethodAnnotationReader;
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use OCP\IRequest;
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use OCP\AppFramework\Http\Response;
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use OCP\AppFramework\Middleware;
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/**
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* This middleware sets the correct CORS headers on a response if the
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* controller has the @CORS annotation. This is needed for webapps that want
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* to access an API and dont run on the same domain, see
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* https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
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*/
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class CORSMiddleware extends Middleware {
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private $request;
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/**
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2014-05-11 16:03:58 +04:00
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* @param IRequest $request
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2014-05-08 13:47:18 +04:00
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*/
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public function __construct(IRequest $request) {
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$this->request = $request;
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}
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/**
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* This is being run after a successful controllermethod call and allows
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* the manipulation of a Response object. The middleware is run in reverse order
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*
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* @param Controller $controller the controller that is being called
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* @param string $methodName the name of the method that will be called on
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* the controller
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* @param Response $response the generated response from the controller
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* @return Response a Response object
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*/
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public function afterController($controller, $methodName, Response $response){
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// only react if its a CORS request and if the request sends origin and
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$reflector = new MethodAnnotationReader($controller, $methodName);
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if(isset($this->request->server['HTTP_ORIGIN']) &&
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$reflector->hasAnnotation('CORS')) {
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// allow credentials headers must not be true or CSRF is possible
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// otherwise
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foreach($response->getHeaders() as $header => $value ) {
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if(strtolower($header) === 'access-control-allow-credentials' &&
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strtolower(trim($value)) === 'true') {
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$msg = 'Access-Control-Allow-Credentials must not be '.
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'set to true in order to prevent CSRF';
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throw new SecurityException($msg);
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}
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}
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$origin = $this->request->server['HTTP_ORIGIN'];
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$response->addHeader('Access-Control-Allow-Origin', $origin);
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}
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return $response;
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}
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}
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