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<?php | |
/* | |
* This file is part of the Symfony package. | |
* | |
* (c) Fabien Potencier <fabien@symfony.com> | |
* | |
* For the full copyright and license information, please view the LICENSE | |
* file that was distributed with this source code. | |
*/ | |
namespace Symfony\Component\HttpKernel\EventListener; | |
use Symfony\Component\HttpFoundation\Request; | |
use Symfony\Component\HttpKernel\Event\GetResponseEvent; | |
use Symfony\Component\HttpKernel\KernelEvents; | |
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException; | |
use Symfony\Component\HttpKernel\UriSigner; | |
use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
/** | |
* Handles content fragments represented by special URIs. | |
* | |
* All URL paths starting with /_fragment are handled as | |
* content fragments by this listener. | |
* | |
* If throws an AccessDeniedHttpException exception if the request | |
* is not signed or if it is not an internal sub-request. | |
* | |
* @author Fabien Potencier <fabien@symfony.com> | |
*/ | |
class FragmentListener implements EventSubscriberInterface | |
{ | |
private $signer; | |
private $fragmentPath; | |
/** | |
* Constructor. | |
* | |
* @param UriSigner $signer A UriSigner instance | |
* @param string $fragmentPath The path that triggers this listener | |
*/ | |
public function __construct(UriSigner $signer, $fragmentPath = '/_fragment') | |
{ | |
$this->signer = $signer; | |
$this->fragmentPath = $fragmentPath; | |
} | |
/** | |
* Fixes request attributes when the path is '/_fragment'. | |
* | |
* @param GetResponseEvent $event A GetResponseEvent instance | |
* | |
* @throws AccessDeniedHttpException if the request does not come from a trusted IP. | |
*/ | |
public function onKernelRequest(GetResponseEvent $event) | |
{ | |
$request = $event->getRequest(); | |
if ($this->fragmentPath !== rawurldecode($request->getPathInfo())) { | |
return; | |
} | |
if ($request->attributes->has('_controller')) { | |
// Is a sub-request: no need to parse _path but it should still be removed from query parameters as below. | |
$request->query->remove('_path'); | |
return; | |
} | |
if ($event->isMasterRequest()) { | |
$this->validateRequest($request); | |
} | |
parse_str($request->query->get('_path', ''), $attributes); | |
$request->attributes->add($attributes); | |
$request->attributes->set('_route_params', array_replace($request->attributes->get('_route_params', array()), $attributes)); | |
$request->query->remove('_path'); | |
} | |
protected function validateRequest(Request $request) | |
{ | |
// is the Request safe? | |
if (!$request->isMethodSafe()) { | |
throw new AccessDeniedHttpException(); | |
} | |
// is the Request signed? | |
// we cannot use $request->getUri() here as we want to work with the original URI (no query string reordering) | |
if ($this->signer->check($request->getSchemeAndHttpHost().$request->getBaseUrl().$request->getPathInfo().(null !== ($qs = $request->server->get('QUERY_STRING')) ? '?'.$qs : ''))) { | |
return; | |
} | |
throw new AccessDeniedHttpException(); | |
} | |
public static function getSubscribedEvents() | |
{ | |
return array( | |
KernelEvents::REQUEST => array(array('onKernelRequest', 48)), | |
); | |
} | |
} |