SessionTestSubscriber.php in Drupal 9

Namespace

Drupal\session_test\EventSubscriber

File

core/modules/system/tests/modules/session_test/src/EventSubscriber/SessionTestSubscriber.php

<?php

namespace Drupal\session_test\EventSubscriber;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Event\ResponseEvent;
use Symfony\Component\HttpKernel\Event\RequestEvent;

/**
 * Defines a test session subscriber that checks whether the session is empty.
 */
class SessionTestSubscriber implements EventSubscriberInterface {

  /**
   * Stores whether $_SESSION is empty at the beginning of the request.
   *
   * @var bool
   */
  protected $emptySession;

  /**
   * Set header for session testing.
   *
   * @param \Symfony\Component\HttpKernel\Event\RequestEvent $event
   *   The Event to process.
   */
  public function onKernelRequestSessionTest(RequestEvent $event) {
    $session = $event
      ->getRequest()
      ->getSession();
    $this->emptySession = (int) (!($session && $session
      ->start()));
  }

  /**
   * Performs tasks for session_test module on kernel.response.
   *
   * @param \Symfony\Component\HttpKernel\Event\ResponseEvent $event
   *   The Event to process.
   */
  public function onKernelResponseSessionTest(ResponseEvent $event) {

    // Set header for session testing.
    $response = $event
      ->getResponse();
    $response->headers
      ->set('X-Session-Empty', $this->emptySession);
  }

  /**
   * Registers the methods in this class that should be listeners.
   *
   * @return array
   *   An array of event listener definitions.
   */
  public static function getSubscribedEvents() {
    $events[KernelEvents::RESPONSE][] = [
      'onKernelResponseSessionTest',
    ];
    $events[KernelEvents::REQUEST][] = [
      'onKernelRequestSessionTest',
    ];
    return $events;
  }

}

Classes

Name	Description
SessionTestSubscriber	Defines a test session subscriber that checks whether the session is empty.