FormTestEventSubscriber.php in Drupal 8

Namespace

Drupal\form_test\EventSubscriber

File

core/modules/system/tests/modules/form_test/src/EventSubscriber/FormTestEventSubscriber.php

<?php

namespace Drupal\form_test\EventSubscriber;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;

/**
 * Test event subscriber to add new attributes to the request.
 */
class FormTestEventSubscriber implements EventSubscriberInterface {

  /**
   * Adds custom attributes to the request object.
   *
   * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
   *   The kernel request event.
   */
  public function onKernelRequest(GetResponseEvent $event) {
    $request = $event
      ->getRequest();
    $request->attributes
      ->set('custom_attributes', 'custom_value');
    $request->attributes
      ->set('request_attribute', 'request_value');
  }

  /**
   * Adds custom headers to the response.
   *
   * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
   *   The kernel request event.
   */
  public function onKernelResponse(FilterResponseEvent $event) {
    $response = $event
      ->getResponse();
    $response->headers
      ->set('X-Form-Test-Response-Event', 'invoked');
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events[KernelEvents::REQUEST][] = [
      'onKernelRequest',
    ];
    $events[KernelEvents::RESPONSE][] = [
      'onKernelResponse',
    ];
    return $events;
  }

}

Classes

Name	Description
FormTestEventSubscriber	Test event subscriber to add new attributes to the request.