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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\Security\Http;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Security\Http\Firewall\AccessListener;
use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
/**
* Firewall uses a FirewallMap to register security listeners for the given
* request.
*
* It allows for different security strategies within the same application
* (a Basic authentication for the /api, and a web based authentication for
* everything else for instance).
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Firewall implements EventSubscriberInterface
{
private $map;
private $dispatcher;
private $exceptionListeners;
public function __construct(FirewallMapInterface $map, EventDispatcherInterface $dispatcher)
{
$this->map = $map;
$this->dispatcher = $dispatcher;
$this->exceptionListeners = new \SplObjectStorage();
}
public function onKernelRequest(RequestEvent $event)
{
if (!$event->isMasterRequest()) {
return;
}
// register listeners for this firewall
$listeners = $this->map->getListeners($event->getRequest());
$authenticationListeners = $listeners[0];
$exceptionListener = $listeners[1];
$logoutListener = $listeners[2];
if (null !== $exceptionListener) {
$this->exceptionListeners[$event->getRequest()] = $exceptionListener;
$exceptionListener->register($this->dispatcher);
}
$authenticationListeners = function () use ($authenticationListeners, $logoutListener) {
$accessListener = null;
foreach ($authenticationListeners as $listener) {
if ($listener instanceof AccessListener) {
$accessListener = $listener;
continue;
}
yield $listener;
}
if (null !== $logoutListener) {
yield $logoutListener;
}
if (null !== $accessListener) {
yield $accessListener;
}
};
$this->callListeners($event, $authenticationListeners());
}
public function onKernelFinishRequest(FinishRequestEvent $event)
{
$request = $event->getRequest();
if (isset($this->exceptionListeners[$request])) {
$this->exceptionListeners[$request]->unregister($this->dispatcher);
unset($this->exceptionListeners[$request]);
}
}
/**
* {@inheritdoc}
*/
public static function getSubscribedEvents()
{
return [
KernelEvents::REQUEST => ['onKernelRequest', 8],
KernelEvents::FINISH_REQUEST => 'onKernelFinishRequest',
];
}
protected function callListeners(RequestEvent $event, iterable $listeners)
{
foreach ($listeners as $listener) {
$listener($event);
if ($event->hasResponse()) {
break;
}
}
}
}
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