如何在事件侦听器中触发重定向到特定路由器？

有很多例子，但我找不到“GetResponseForExceptionEvent”的例子。例如，当我通过@roter作为一个论点$this->router....似乎没有这样工作。

我检查了这些，但我可能错过了一些东西：

• 显示特定路线而不是错误页面 (404) - Symfony2 https://stackoverflow.com/questions/15983082/show-a-specific-route-instead-of-error-page-404-symfony2
• symfony2：挂钩 NotFoundHttpException 进行重定向 https://stackoverflow.com/questions/13564466/symfony2-hook-into-notfoundhttpexception-for-redirection
• Symfony2 事件监听器重定向？ https://stackoverflow.com/questions/12916439/symfony2-redirect-for-event-listener
• Symfony2：在页面加载事件监听器中获取路由 https://stackoverflow.com/questions/11505287/symfony2-getting-route-in-page-load-event-listener/11506088#11506088
• 如果用户已登录则重定向 https://stackoverflow.com/questions/10487557/redirect-if-the-user-is-logged-in

服务.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(...........);
        }
    }
} 

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控制器中触发操作。

让我知道这是否有效。

Option 1

Note:看一下Symfony2 事件监听器重定向 https://stackoverflow.com/questions/12916439/symfony2-redirect-for-event-listener

1 Pass the router to your event listener:

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

2 Use the router within the listener to redirect users:

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);

        }
    }
} 

Option 2

您可以创建一条特殊的路由来匹配所有不存在的路由；然后，您可以在您选择的控制器中按照您想要的方式处理重定向，此处为 PageNotFoundController：

1 At the end of app/config/routing.yml

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

    }

}