Question

我有一个定义的侦听器正在观察可能发生错误的onKernelException。

class SpecificExceptionListener
{
    public function onKernelException(GetResponseForExceptionEvent $event)
    {
        $exception = $event->getException();
        if ($exception instanceof SpecificExceptionToBeProcessed) {
            // ...
            if ($somethingWentWrong) {
                // here, redirect to the default/overriden Symfony error page
            }
            // ...
        }
    }
}

如果出现错误，如何重定向到标准/自定义错误页面？

Answer 1

对于那些可能感兴趣的人，以下是如何做到的：

use Symfony\Bundle\TwigBundle\TwigEngine;
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
use Symfony\Component\HttpFoundation\Response;
// ...

class SpecificExceptionListener
{
    protected $templating;

    public function __construct(TwigEngine $templating)
    {
        $this->templating = $templating;
    }

    public function onKernelException(GetResponseForExceptionEvent $event)
    {
        $exception = $event->getException();
        if ($exception instanceof SpecificExceptionToBeProcessed) {
            // ...
            if ($somethingWentWrong) {
                // build response to display Symfony default error page
                // replace by your own template if needed
                $response = new Response();
                $response->setContent(
                    $this->templating->render('TwigBundle:Exception:error.html.twig')
                );

                $event->setResponse($response);

                return;
            }
            // ...
        }
    }
}

如何在事件监听器中重定向500？

1 个答案: