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File: vendor/symfony/http-kernel/HttpKernel.php

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File: vendor/symfony/http-kernel/HttpKernel.php
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Description: Class source
Class: PHP Pokemon Script
Provides an API to manage a database of Pokemons
Author: By
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Date: 6 years ago
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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; use Symfony\Component\HttpKernel\Controller\ArgumentResolver; use Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface; use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface; use Symfony\Component\HttpKernel\Event\FilterControllerArgumentsEvent; 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\RequestExceptionInterface; 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; private $argumentResolver; public function __construct(EventDispatcherInterface $dispatcher, ControllerResolverInterface $resolver, RequestStack $requestStack = null, ArgumentResolverInterface $argumentResolver = null) { $this->dispatcher = $dispatcher; $this->resolver = $resolver; $this->requestStack = $requestStack ?: new RequestStack(); $this->argumentResolver = $argumentResolver; if (null === $this->argumentResolver) { @trigger_error(sprintf('As of 3.1 an %s is used to resolve arguments. In 4.0 the $argumentResolver becomes the %s if no other is provided instead of using the $resolver argument.', ArgumentResolverInterface::class, ArgumentResolver::class), E_USER_DEPRECATED); // fallback in case of deprecations $this->argumentResolver = $resolver; } } /** * {@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 RequestExceptionInterface) { $e = new BadRequestHttpException($e->getMessage(), $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 = $this->argumentResolver->getArguments($request, $controller); $event = new FilterControllerArgumentsEvent($this, $controller, $arguments, $request, $type); $this->dispatcher->dispatch(KernelEvents::CONTROLLER_ARGUMENTS, $event); $controller = $event->getController(); $arguments = $event->getArguments(); // 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')) { @trigger_error(sprintf('Using the X-Status-Code header is deprecated since version 3.3 and will be removed in 4.0. Use %s::allowCustomResponseCode() instead.', GetResponseForExceptionEvent::class), E_USER_DEPRECATED); $response->setStatusCode($response->headers->get('X-Status-Code')); $response->headers->remove('X-Status-Code'); } elseif (!$event->isAllowingCustomResponseCode() && !$response->isClientError() && !$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; } }