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Edit File : HttpKernel.php \| Size : 11.08 KB
<?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\HttpFoundation\Exception\RequestExceptionInterface; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\RequestStack; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\HttpFoundation\StreamedResponse; use Symfony\Component\HttpKernel\Controller\ArgumentResolver; use Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface; use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface; use Symfony\Component\HttpKernel\Event\ControllerArgumentsEvent; use Symfony\Component\HttpKernel\Event\ControllerEvent; use Symfony\Component\HttpKernel\Event\ExceptionEvent; use Symfony\Component\HttpKernel\Event\FinishRequestEvent; use Symfony\Component\HttpKernel\Event\RequestEvent; use Symfony\Component\HttpKernel\Event\ResponseEvent; use Symfony\Component\HttpKernel\Event\TerminateEvent; use Symfony\Component\HttpKernel\Event\ViewEvent; use Symfony\Component\HttpKernel\Exception\BadRequestHttpException; use Symfony\Component\HttpKernel\Exception\ControllerDoesNotReturnResponseException; use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface; use Symfony\Component\HttpKernel\Exception\NotFoundHttpException; use Symfony\Contracts\EventDispatcher\EventDispatcherInterface; // Help opcache.preload discover always-needed symbols class_exists(ControllerArgumentsEvent::class); class_exists(ControllerEvent::class); class_exists(ExceptionEvent::class); class_exists(FinishRequestEvent::class); class_exists(RequestEvent::class); class_exists(ResponseEvent::class); class_exists(TerminateEvent::class); class_exists(ViewEvent::class); class_exists(KernelEvents::class); /* * 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 ArgumentResolverInterface $argumentResolver; private bool $handleAllThrowables; public function __construct(EventDispatcherInterface $dispatcher, ControllerResolverInterface $resolver, RequestStack $requestStack = null, ArgumentResolverInterface $argumentResolver = null, bool $handleAllThrowables = false) { $this->dispatcher = $dispatcher; $this->resolver = $resolver; $this->requestStack = $requestStack ?? new RequestStack(); $this->argumentResolver = $argumentResolver ?? new ArgumentResolver(); $this->handleAllThrowables = $handleAllThrowables; } public function handle(Request $request, int $type = HttpKernelInterface::MAIN_REQUEST, bool $catch = true): Response { $request->headers->set('X-Php-Ob-Level', (string) ob_get_level()); $this->requestStack->push($request); $response = null; try { return $response = $this->handleRaw($request, $type); } catch (\Throwable $e) { if ($e instanceof \Error && !$this->handleAllThrowables) { throw $e; } if ($e instanceof RequestExceptionInterface) { $e = new BadRequestHttpException($e->getMessage(), $e); } if (false === $catch) { $this->finishRequest($request, $type); throw $e; } return $response = $this->handleThrowable($e, $request, $type); } finally { $this->requestStack->pop(); if ($response instanceof StreamedResponse) { $callback = $response->getCallback(); $requestStack = $this->requestStack; $response->setCallback(static function () use ($request, $callback, $requestStack) { $requestStack->push($request); try { $callback(); } finally { $requestStack->pop(); } }); } } } /* * @return void / public function terminate(Request $request, Response $response) { $this->dispatcher->dispatch(new TerminateEvent($this, $request, $response), KernelEvents::TERMINATE); } /* * @internal / public function terminateWithException(\Throwable $exception, Request $request = null): void { if (!$request ??= $this->requestStack->getMainRequest()) { throw $exception; } if ($pop = $request !== $this->requestStack->getMainRequest()) { $this->requestStack->push($request); } try { $response = $this->handleThrowable($exception, $request, self::MAIN_REQUEST); } finally { if ($pop) { $this->requestStack->pop(); } } $response->sendHeaders(); $response->sendContent(); $this->terminate($request, $response); } /* * Handles a request to convert it to a response. * * Exceptions are not caught. * * @throws \LogicException If one of the listener does not behave as expected * @throws NotFoundHttpException When controller cannot be found / private function handleRaw(Request $request, int $type = self::MAIN_REQUEST): Response { // request $event = new RequestEvent($this, $request, $type); $this->dispatcher->dispatch($event, KernelEvents::REQUEST); 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())); } $event = new ControllerEvent($this, $controller, $request, $type); $this->dispatcher->dispatch($event, KernelEvents::CONTROLLER); $controller = $event->getController(); // controller arguments $arguments = $this->argumentResolver->getArguments($request, $controller, $event->getControllerReflector()); $event = new ControllerArgumentsEvent($this, $event, $arguments, $request, $type); $this->dispatcher->dispatch($event, KernelEvents::CONTROLLER_ARGUMENTS); $controller = $event->getController(); $arguments = $event->getArguments(); // call controller $response = $controller(...$arguments); // view if (!$response instanceof Response) { $event = new ViewEvent($this, $request, $type, $response, $event); $this->dispatcher->dispatch($event, KernelEvents::VIEW); if ($event->hasResponse()) { $response = $event->getResponse(); } else { $msg = sprintf('The controller must return a "Symfony\Component\HttpFoundation\Response" object but it returned %s.', $this->varToString($response)); // the user may have forgotten to return something if (null === $response) { $msg .= ' Did you forget to add a return statement somewhere in your controller?'; } throw new ControllerDoesNotReturnResponseException($msg, $controller, __FILE__, __LINE__ - 17); } } return $this->filterResponse($response, $request, $type); } /* * Filters a response object. * * @throws \RuntimeException if the passed object is not a Response instance / private function filterResponse(Response $response, Request $request, int $type): Response { $event = new ResponseEvent($this, $request, $type, $response); $this->dispatcher->dispatch($event, KernelEvents::RESPONSE); $this->finishRequest($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. / private function finishRequest(Request $request, int $type): void { $this->dispatcher->dispatch(new FinishRequestEvent($this, $request, $type), KernelEvents::FINISH_REQUEST); } /* * Handles a throwable by trying to convert it to a Response. / private function handleThrowable(\Throwable $e, Request $request, int $type): Response { $event = new ExceptionEvent($this, $request, $type, $e); $this->dispatcher->dispatch($event, KernelEvents::EXCEPTION); // a listener might have replaced the exception $e = $event->getThrowable(); if (!$event->hasResponse()) { $this->finishRequest($request, $type); throw $e; } $response = $event->getResponse(); // the developer asked for a specific status code if (!$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 (\Throwable $e) { if ($e instanceof \Error && !$this->handleAllThrowables) { throw $e; } return $response; } } /* * Returns a human-readable string for the specified variable. */ private function varToString(mixed $var): string { if (\is_object($var)) { return sprintf('an object of type %s', $var::class); } if (\is_array($var)) { $a = []; foreach ($var as $k => $v) { $a[] = sprintf('%s => ...', $k); } return sprintf('an array ([%s])', mb_substr(implode(', ', $a), 0, 255)); } if (\is_resource($var)) { return sprintf('a resource (%s)', get_resource_type($var)); } if (null === $var) { return 'null'; } if (false === $var) { return 'a boolean value (false)'; } if (true === $var) { return 'a boolean value (true)'; } if (\is_string($var)) { return sprintf('a string ("%s%s")', mb_substr($var, 0, 255), mb_strlen($var) > 255 ? '...' : ''); } if (is_numeric($var)) { return sprintf('a number (%s)', (string) $var); } return (string) $var; } } Back

Edit File : HttpKernel.php | Size : 11.08 KB

<?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\HttpFoundation\Exception\RequestExceptionInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\HttpKernel\Controller\ArgumentResolver;
use Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface;
use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface;
use Symfony\Component\HttpKernel\Event\ControllerArgumentsEvent;
use Symfony\Component\HttpKernel\Event\ControllerEvent;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\Event\ResponseEvent;
use Symfony\Component\HttpKernel\Event\TerminateEvent;
use Symfony\Component\HttpKernel\Event\ViewEvent;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\ControllerDoesNotReturnResponseException;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;

// Help opcache.preload discover always-needed symbols
class_exists(ControllerArgumentsEvent::class);
class_exists(ControllerEvent::class);
class_exists(ExceptionEvent::class);
class_exists(FinishRequestEvent::class);
class_exists(RequestEvent::class);
class_exists(ResponseEvent::class);
class_exists(TerminateEvent::class);
class_exists(ViewEvent::class);
class_exists(KernelEvents::class);

/**
 * 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 ArgumentResolverInterface $argumentResolver;
    private bool $handleAllThrowables;

public function __construct(EventDispatcherInterface $dispatcher, ControllerResolverInterface $resolver, RequestStack $requestStack = null, ArgumentResolverInterface $argumentResolver = null, bool $handleAllThrowables = false)
    {
        $this->dispatcher = $dispatcher;
        $this->resolver = $resolver;
        $this->requestStack = $requestStack ?? new RequestStack();
        $this->argumentResolver = $argumentResolver ?? new ArgumentResolver();
        $this->handleAllThrowables = $handleAllThrowables;
    }

public function handle(Request $request, int $type = HttpKernelInterface::MAIN_REQUEST, bool $catch = true): Response
    {
        $request->headers->set('X-Php-Ob-Level', (string) ob_get_level());

$this->requestStack->push($request);
        $response = null;
        try {
            return $response = $this->handleRaw($request, $type);
        } catch (\Throwable $e) {
            if ($e instanceof \Error && !$this->handleAllThrowables) {
                throw $e;
            }

if ($e instanceof RequestExceptionInterface) {
                $e = new BadRequestHttpException($e->getMessage(), $e);
            }
            if (false === $catch) {
                $this->finishRequest($request, $type);

throw $e;
            }

return $response = $this->handleThrowable($e, $request, $type);
        } finally {
            $this->requestStack->pop();

if ($response instanceof StreamedResponse) {
                $callback = $response->getCallback();
                $requestStack = $this->requestStack;

$response->setCallback(static function () use ($request, $callback, $requestStack) {
                    $requestStack->push($request);
                    try {
                        $callback();
                    } finally {
                        $requestStack->pop();
                    }
                });
            }
        }
    }

/**
     * @return void
     */
    public function terminate(Request $request, Response $response)
    {
        $this->dispatcher->dispatch(new TerminateEvent($this, $request, $response), KernelEvents::TERMINATE);
    }

/**
     * @internal
     */
    public function terminateWithException(\Throwable $exception, Request $request = null): void
    {
        if (!$request ??= $this->requestStack->getMainRequest()) {
            throw $exception;
        }

if ($pop = $request !== $this->requestStack->getMainRequest()) {
            $this->requestStack->push($request);
        }

try {
            $response = $this->handleThrowable($exception, $request, self::MAIN_REQUEST);
        } finally {
            if ($pop) {
                $this->requestStack->pop();
            }
        }

$response->sendHeaders();
        $response->sendContent();

$this->terminate($request, $response);
    }

/**
     * Handles a request to convert it to a response.
     *
     * Exceptions are not caught.
     *
     * @throws \LogicException       If one of the listener does not behave as expected
     * @throws NotFoundHttpException When controller cannot be found
     */
    private function handleRaw(Request $request, int $type = self::MAIN_REQUEST): Response
    {
        // request
        $event = new RequestEvent($this, $request, $type);
        $this->dispatcher->dispatch($event, KernelEvents::REQUEST);

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()));
        }

$event = new ControllerEvent($this, $controller, $request, $type);
        $this->dispatcher->dispatch($event, KernelEvents::CONTROLLER);
        $controller = $event->getController();

// controller arguments
        $arguments = $this->argumentResolver->getArguments($request, $controller, $event->getControllerReflector());

$event = new ControllerArgumentsEvent($this, $event, $arguments, $request, $type);
        $this->dispatcher->dispatch($event, KernelEvents::CONTROLLER_ARGUMENTS);
        $controller = $event->getController();
        $arguments = $event->getArguments();

// call controller
        $response = $controller(...$arguments);

// view
        if (!$response instanceof Response) {
            $event = new ViewEvent($this, $request, $type, $response, $event);
            $this->dispatcher->dispatch($event, KernelEvents::VIEW);

if ($event->hasResponse()) {
                $response = $event->getResponse();
            } else {
                $msg = sprintf('The controller must return a "Symfony\Component\HttpFoundation\Response" object but it returned %s.', $this->varToString($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 ControllerDoesNotReturnResponseException($msg, $controller, __FILE__, __LINE__ - 17);
            }
        }

return $this->filterResponse($response, $request, $type);
    }

/**
     * Filters a response object.
     *
     * @throws \RuntimeException if the passed object is not a Response instance
     */
    private function filterResponse(Response $response, Request $request, int $type): Response
    {
        $event = new ResponseEvent($this, $request, $type, $response);

$this->dispatcher->dispatch($event, KernelEvents::RESPONSE);

$this->finishRequest($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.
     */
    private function finishRequest(Request $request, int $type): void
    {
        $this->dispatcher->dispatch(new FinishRequestEvent($this, $request, $type), KernelEvents::FINISH_REQUEST);
    }

/**
     * Handles a throwable by trying to convert it to a Response.
     */
    private function handleThrowable(\Throwable $e, Request $request, int $type): Response
    {
        $event = new ExceptionEvent($this, $request, $type, $e);
        $this->dispatcher->dispatch($event, KernelEvents::EXCEPTION);

// a listener might have replaced the exception
        $e = $event->getThrowable();

if (!$event->hasResponse()) {
            $this->finishRequest($request, $type);

throw $e;
        }

$response = $event->getResponse();

// the developer asked for a specific status code
        if (!$event->isAllowingCustomResponseCode() && !$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 (\Throwable $e) {
            if ($e instanceof \Error && !$this->handleAllThrowables) {
                throw $e;
            }

return $response;
        }
    }

/**
     * Returns a human-readable string for the specified variable.
     */
    private function varToString(mixed $var): string
    {
        if (\is_object($var)) {
            return sprintf('an object of type %s', $var::class);
        }

if (\is_array($var)) {
            $a = [];
            foreach ($var as $k => $v) {
                $a[] = sprintf('%s => ...', $k);
            }

return sprintf('an array ([%s])', mb_substr(implode(', ', $a), 0, 255));
        }

if (\is_resource($var)) {
            return sprintf('a resource (%s)', get_resource_type($var));
        }

if (null === $var) {
            return 'null';
        }

if (false === $var) {
            return 'a boolean value (false)';
        }

if (true === $var) {
            return 'a boolean value (true)';
        }

if (\is_string($var)) {
            return sprintf('a string ("%s%s")', mb_substr($var, 0, 255), mb_strlen($var) > 255 ? '...' : '');
        }

if (is_numeric($var)) {
            return sprintf('a number (%s)', (string) $var);
        }

return (string) $var;
    }
}

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