如何在监听器中注入@request_stack或@request

Question

我有这个听众：

use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpFoundation\Request;

class ControllerListener
{
    public function onKernelController( FilterControllerEvent $event, Request $request )
    {
        if (HttpKernelInterface::MASTER_REQUEST === $event->getRequestType()) {
            $controllers = $event->getController();
            if (is_array( $controllers )) {
                $controller = $controllers[0];
                if (is_object( $controller )) {
                    if (method_exists( $controller, 'parControl' )) {
                        $controller->parControl(
                            $controller->getRequest(),
                            $controller->getRequest()->get( 'action' ),
                            $controller->getRequest()->get( 'context' ),
                            $controller->getRequest()->get( 'page' ),
                            $controller->getRequest()->get( 'case' ),
                            $controller->getRequest()->get( 'subset' )
                        );
                    }

                    if (method_exists( $controller, 'adminProjectControl' )) {
                        // to this method I need to pass Request $request  
                        $controller->adminProjectControl($request);
                    }

                    if (method_exists( $controller, 'accessControl' )) {
                        $controller->accessControl();
                    }
                }
            }
        }
    }

    public function onKernelResponse( FilterResponseEvent $event )
    {
        Utilities::flashDebugLoginMessage();
    }
}

它在 services.yml:

定义为服务

pdone.listener.preexecute:
    class: GroupDCA\PDOneBundle\Listener\ControllerListener
    arguments: [@request]
    public: true
    scope: request
    tags:
        - { name: kernel.event_listener, event: kernel.controller, method: onKernelController }
        - { name: kernel.event_listener, event: kernel.response, method: onKernelResponse }

但我应该做错了，因为我得到了这三个错误：

ContextErrorException in ControllerListener.php line 12: Catchable Fatal Error: Argument 2 passed to GroupDCA\PDOneBundle\Listener\ControllerListener::onKernelController() must be an instance of Symfony\Component\HttpFoundation\Request, string given

ContextErrorException in ControllerListener.php line 12: Catchable Fatal Error: Argument 2 passed to GroupDCA\PDOneBundle\Listener\ControllerListener::onKernelController() must be an instance of Symfony\Component\HttpFoundation\Request, string given

LogicException in bootstrap.php.cache line 3118: No listeners of the "kernel.exception" event set a Response

那么，如何将 Request 注入监听器呢？我可以这样做吗？我在这里也阅读了 this post 但不知道如何做到这一点。

Answer 1

您正在将请求对象从您的服务定义传递给 ControllerListener 构造函数，而不是传递给 onKernelController 方法。

改为：

protected $request;

public function __construct (Request $request) {

    $this->request = $request;
}

这应该可以解决您的问题并使请求对象可用。

Answer 2

FilterControllerEvent 已经 gives you access to the request:

public function onKernelController(FilterControllerEvent $event)
{
    $request = $event->getRequest();       

    // ...
}

如果您需要在事件未提供请求的侦听器中请求，请始终使用 the request stack:

use Symfony\Component\HttpFoundation\RequestStack;

class MyService
{
    private $requestStack;

    public function __construct(RequestStack $requestStack)
    {
        $this->requestStack = $requestStack;
    }

    public function doSomething()
    {
        $request = $this->requestStack->getCurrentRequest();

        // ...
    }
}

注入请求已弃用，将被删除。 Request stack is the way to go。也不要使用 request 范围。

如何在监听器中注入@request_stack或@request

How to inject @request_stack or @request in listener

php

dependency-injection

symfony

symfony-2.7