使用symfony2處理身份驗證異常

Question

我想簡單地返回一條適當的消息，比如return new Response('authentication faild'); 通過API訪問我的客戶端，但它的行為並不像下面的代碼那樣

try{
        $token = $this->get('security.authentication.manager')
                      ->authenticate(new UsernamePasswordToken($username, $password, 'main'));
        $this->get('security.context')->setToken($token);
    }
    catch (BadCredentialsException $e){
        return new Response('authentication faild', 403);
    }

返回的錯誤是登錄表單的html / css ...代碼

Answer 1

看這個：

<?php

namespace YourBundle\EventListener;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;

class CatchErrorsEventSubscriber implements EventSubscriberInterface
{
    public static function getSubscribedEvents()
    {
        return ["kernel.exception" => ['catchException', 200]];
    }

    /**
     * @param GetResponseForExceptionEvent $evt
     */
    public function catchException(GetResponseForExceptionEvent $evt)
    {
        $request = $evt->getRequest()->getRequestFormat('json');

        if($request != 'json') {
            return;
        }

        $response = $evt->getResponse() ?: new Response();
        $evt->stopPropagation();  // stop the other listener to redirect to login
        $evt->setResponse($response);
    }
}

此偵聽器將捕獲異常，您可以按所需方式發送響應。 僅在此示例中，請求是json請求。

不要忘記將訂戶注冊為服務：

    <service class="YourBundle\EventListener\CatchErrorsEventSubscriber" id="your_bundle.catch_error_event_subscriber">
        <tag name="kernel.event_subscriber"/>
    </service>