symfony - 使用事件监听器重定向所有 "No route found 404 Not Found - NotFoundHttpException"

Question

如何在事件监听器中触发重定向到特定路由器？

有很多示例，但我找不到“GetResponseForExceptionEvent”的示例。例如，当我将 @roter 作为参数传递时，$this->router.... 似乎不起作用。

我检查了这些，但我可能错过了一些东西:

• Show a specific route instead of error page (404) - Symfony2
• symfony2: hook into NotFoundHttpException for redirection
• Symfony2 redirect for event listener?
• Symfony2: Getting Route in Page Load Event Listener
• Redirect if the user is logged in

service.yml

services:
    kernel.listener.kernel_request:
        class: Booking\AdminBundle\EventListener\ErrorRedirect
        tags:
            - { name: kernel.event_listener, event: kernel.exception, method: onKernelException }

事件监听器:

namespace Booking\AdminBundle\EventListener;

use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class ErrorRedirect
{
    public function onKernelException(GetResponseForExceptionEvent $event)
    {
        $exception = $event->getException();

        if ($exception instanceof NotFoundHttpException) {
            // redirect to '/' router or '/error'
            //$event->setResponse(...........);
        }
    }
} 

Answer 1

您有 2 个选择:

• 使用事件监听器
• 使用与所有不存在的路由相匹配的路由，并在 Controller 中触发操作。

让我知道这是否有效。

<小时/>

选项 1

注意:看看 Symfony2 redirect for event listener

1 将路由器传递给您的事件监听器:

kernel.listener.kernel_request:
       class: Booking\AdminBundle\EventListener\ErrorRedirect
       arguments:
           router: "@router"
       tags:
           - { name: kernel.event_listener, event: kernel.exception, method: onKernelException }

2 使用监听器内的路由器重定向用户:

namespace Booking\AdminBundle\EventListener;

use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Bundle\FrameworkBundle\Routing\Router;

class ErrorRedirect
{
    /**
     * Holds Symfony2 router
     *
     *@var Router
     */
    protected $router;

    /**
     * @param Router
     */
    public function __construct(Router $router)
    {
        $this->router = $router;
    }


    public function onKernelException(GetResponseForExceptionEvent $event)
    {
        $exception = $event->getException();

        if ($exception instanceof NotFoundHttpException) {

            /** Choose your router here */
            $route = 'route_name';

            if ($route === $event->getRequest()->get('_route')) {
                return;
            }

            $url = $this->router->generate($route);
            $response = new RedirectResponse($url);
            $event->setResponse($response);

        }
    }
} 

<小时/>

选项 2

您可以创建一个特殊的路由来匹配所有不存在的路由；然后，您可以在您选择的 Controller 中按照您想要的方式处理重定向，此处为 PageNotFoundController:

1 在 app/config/routing.yml 末尾

pageNotFound:
    pattern:  /{path}
    defaults: { _controller: AcmeDemoBundle:PageNotFound:pageNotFound, path: '' }
    requirements:
        path: .*

2

<?php

namespace Acme\DemoBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class PageNotFoundController extends Controller
{

    public function pageNotFoundAction()
    {
        // redirect the way you want

    }

}