--- /dev/null
+<?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;
+
+use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
+use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
+use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
+use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
+use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
+use Symfony\Component\HttpKernel\Event\PostResponseEvent;
+use Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+
+/**
+ * HttpKernel notifies events to convert a Request object to a Response one.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class HttpKernel implements HttpKernelInterface, TerminableInterface
+{
+ protected $dispatcher;
+ protected $resolver;
+ protected $requestStack;
+
+ /**
+ * Constructor.
+ *
+ * @param EventDispatcherInterface $dispatcher An EventDispatcherInterface instance
+ * @param ControllerResolverInterface $resolver A ControllerResolverInterface instance
+ * @param RequestStack $requestStack A stack for master/sub requests
+ */
+ public function __construct(EventDispatcherInterface $dispatcher, ControllerResolverInterface $resolver, RequestStack $requestStack = null)
+ {
+ $this->dispatcher = $dispatcher;
+ $this->resolver = $resolver;
+ $this->requestStack = $requestStack ?: new RequestStack();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true)
+ {
+ $request->headers->set('X-Php-Ob-Level', ob_get_level());
+
+ try {
+ return $this->handleRaw($request, $type);
+ } catch (\Exception $e) {
+ if ($e instanceof ConflictingHeadersException) {
+ $e = new BadRequestHttpException('The request headers contain conflicting information regarding the origin of this request.', $e);
+ }
+ if (false === $catch) {
+ $this->finishRequest($request, $type);
+
+ throw $e;
+ }
+
+ return $this->handleException($e, $request, $type);
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function terminate(Request $request, Response $response)
+ {
+ $this->dispatcher->dispatch(KernelEvents::TERMINATE, new PostResponseEvent($this, $request, $response));
+ }
+
+ /**
+ * @throws \LogicException If the request stack is empty
+ *
+ * @internal
+ */
+ public function terminateWithException(\Exception $exception)
+ {
+ if (!$request = $this->requestStack->getMasterRequest()) {
+ throw new \LogicException('Request stack is empty', 0, $exception);
+ }
+
+ $response = $this->handleException($exception, $request, self::MASTER_REQUEST);
+
+ $response->sendHeaders();
+ $response->sendContent();
+
+ $this->terminate($request, $response);
+ }
+
+ /**
+ * Handles a request to convert it to a response.
+ *
+ * Exceptions are not caught.
+ *
+ * @param Request $request A Request instance
+ * @param int $type The type of the request (one of HttpKernelInterface::MASTER_REQUEST or HttpKernelInterface::SUB_REQUEST)
+ *
+ * @return Response A Response instance
+ *
+ * @throws \LogicException If one of the listener does not behave as expected
+ * @throws NotFoundHttpException When controller cannot be found
+ */
+ private function handleRaw(Request $request, $type = self::MASTER_REQUEST)
+ {
+ $this->requestStack->push($request);
+
+ // request
+ $event = new GetResponseEvent($this, $request, $type);
+ $this->dispatcher->dispatch(KernelEvents::REQUEST, $event);
+
+ if ($event->hasResponse()) {
+ return $this->filterResponse($event->getResponse(), $request, $type);
+ }
+
+ // load controller
+ if (false === $controller = $this->resolver->getController($request)) {
+ throw new NotFoundHttpException(sprintf('Unable to find the controller for path "%s". The route is wrongly configured.', $request->getPathInfo()));
+ }
+
+ $event = new FilterControllerEvent($this, $controller, $request, $type);
+ $this->dispatcher->dispatch(KernelEvents::CONTROLLER, $event);
+ $controller = $event->getController();
+
+ // controller arguments
+ $arguments = $this->resolver->getArguments($request, $controller);
+
+ // call controller
+ $response = call_user_func_array($controller, $arguments);
+
+ // view
+ if (!$response instanceof Response) {
+ $event = new GetResponseForControllerResultEvent($this, $request, $type, $response);
+ $this->dispatcher->dispatch(KernelEvents::VIEW, $event);
+
+ if ($event->hasResponse()) {
+ $response = $event->getResponse();
+ }
+
+ if (!$response instanceof Response) {
+ $msg = sprintf('The controller must return a response (%s given).', $this->varToString($response));
+
+ // the user may have forgotten to return something
+ if (null === $response) {
+ $msg .= ' Did you forget to add a return statement somewhere in your controller?';
+ }
+ throw new \LogicException($msg);
+ }
+ }
+
+ return $this->filterResponse($response, $request, $type);
+ }
+
+ /**
+ * Filters a response object.
+ *
+ * @param Response $response A Response instance
+ * @param Request $request An error message in case the response is not a Response object
+ * @param int $type The type of the request (one of HttpKernelInterface::MASTER_REQUEST or HttpKernelInterface::SUB_REQUEST)
+ *
+ * @return Response The filtered Response instance
+ *
+ * @throws \RuntimeException if the passed object is not a Response instance
+ */
+ private function filterResponse(Response $response, Request $request, $type)
+ {
+ $event = new FilterResponseEvent($this, $request, $type, $response);
+
+ $this->dispatcher->dispatch(KernelEvents::RESPONSE, $event);
+
+ $this->finishRequest($request, $type);
+
+ return $event->getResponse();
+ }
+
+ /**
+ * Publishes the finish request event, then pop the request from the stack.
+ *
+ * Note that the order of the operations is important here, otherwise
+ * operations such as {@link RequestStack::getParentRequest()} can lead to
+ * weird results.
+ *
+ * @param Request $request
+ * @param int $type
+ */
+ private function finishRequest(Request $request, $type)
+ {
+ $this->dispatcher->dispatch(KernelEvents::FINISH_REQUEST, new FinishRequestEvent($this, $request, $type));
+ $this->requestStack->pop();
+ }
+
+ /**
+ * Handles an exception by trying to convert it to a Response.
+ *
+ * @param \Exception $e An \Exception instance
+ * @param Request $request A Request instance
+ * @param int $type The type of the request
+ *
+ * @return Response A Response instance
+ *
+ * @throws \Exception
+ */
+ private function handleException(\Exception $e, $request, $type)
+ {
+ $event = new GetResponseForExceptionEvent($this, $request, $type, $e);
+ $this->dispatcher->dispatch(KernelEvents::EXCEPTION, $event);
+
+ // a listener might have replaced the exception
+ $e = $event->getException();
+
+ if (!$event->hasResponse()) {
+ $this->finishRequest($request, $type);
+
+ throw $e;
+ }
+
+ $response = $event->getResponse();
+
+ // the developer asked for a specific status code
+ if ($response->headers->has('X-Status-Code')) {
+ $response->setStatusCode($response->headers->get('X-Status-Code'));
+
+ $response->headers->remove('X-Status-Code');
+ } elseif (!$response->isClientError() && !$response->isServerError() && !$response->isRedirect()) {
+ // ensure that we actually have an error response
+ if ($e instanceof HttpExceptionInterface) {
+ // keep the HTTP status code and headers
+ $response->setStatusCode($e->getStatusCode());
+ $response->headers->add($e->getHeaders());
+ } else {
+ $response->setStatusCode(500);
+ }
+ }
+
+ try {
+ return $this->filterResponse($response, $request, $type);
+ } catch (\Exception $e) {
+ return $response;
+ }
+ }
+
+ private function varToString($var)
+ {
+ if (is_object($var)) {
+ return sprintf('Object(%s)', get_class($var));
+ }
+
+ if (is_array($var)) {
+ $a = array();
+ foreach ($var as $k => $v) {
+ $a[] = sprintf('%s => %s', $k, $this->varToString($v));
+ }
+
+ return sprintf('Array(%s)', implode(', ', $a));
+ }
+
+ if (is_resource($var)) {
+ return sprintf('Resource(%s)', get_resource_type($var));
+ }
+
+ if (null === $var) {
+ return 'null';
+ }
+
+ if (false === $var) {
+ return 'false';
+ }
+
+ if (true === $var) {
+ return 'true';
+ }
+
+ return (string) $var;
+ }
+}
projects / yaffs-website / blobdiff