Symfony 5.3 如何 return 来自前过滤器（EventSubscriberInterface）的 JSON 响应并设置变量以在控制器中访问？

Question

我正在创建一个 API 并想对每个端点进行一些检查，因此我决定将它放在中心位置以不重复任何代码。我创建了一个事件订阅者。现在的问题是，当 try catch 失败时，我如何 return 对 API 的 JSON 响应绕过控制器，其次，我如何将变量 $confirm 传递给控制器它成功了吗？这可以实现吗？

更新它现在正在工作，我自己想出了另一点。我已经用更改更新了源代码，以防其他人需要它（检查更新评论）。我希望这也是正确的 Symfony 方法，即使它有效。再次感谢 Rova Ram！

<?php
namespace App\EventSubscriber;

use App\Controller\ApiCheckController;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\ControllerEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Config\Definition\Exception\Exception;
use Symfony\Component\HttpFoundation\JsonResponse;
use Doctrine\ORM\EntityManagerInterface;


class ApiSubscriber implements EventSubscriberInterface
{
    
    public function __construct(EntityManagerInterface $em)
    {
       $this->em = $em;
       
    }

    public function onKernelController(ControllerEvent $event)
    {
        $controller = $event->getController();

        // UPDATE add below line
        $request = $event->getRequest();

        // when a controller class defines multiple action methods, the controller
        // is returned as [$controllerInstance, 'methodName']
        if (is_array($controller)) {
            $controller = $controller[0];
        }
        
        if ($controller instanceof \App\Controller\ApiCheckController) {
         
            try {
                $confirm = $this->confirmRequest($someData);

                // UPDATE add below this way confirm will be available 
                // in the Controller via  $confirm= $request->get('confirm');
                $request->attributes->set('confirm', $confirm );

            }
            catch(\Exception $e) {
                 $payload = array(
                    "status" => "error", 
                    "message" => $e->getMessage(),
                );

        // UPDATE replace below
        // return new JsonResponse($payload,  JsonResponse::HTTP_BAD_REQUEST);
            
        // instead use
       return $event->setController( function () use($payload) {
                        return new JsonResponse($payload,  JsonResponse::HTTP_BAD_REQUEST);
                    } ); 
      }

      public static function getSubscribedEvents()
      {
        return [
          KernelEvents::CONTROLLER => 'onKernelController'
      
        ];
      }
    }

Answer 1

尝试像这样返回您的 JSON 回复

$event->setController( function () use () {
                            return new JsonResponse();
                        } );

Symfony 5.3 如何 return 来自前过滤器（EventSubscriberInterface）的 JSON 响应并设置变量以在控制器中访问？

Symfony 5.3 How to return a JSON response from a Before Filter (EventSubscriberInterface) and set Variable to access in Controller?

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