KernelPreHandle.php

<?php

namespace Drupal\Core\StackMiddleware;

use Drupal\Core\DrupalKernelInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\HttpKernelInterface;

/**
 * Prepares the environment after page caching ran.
 */
class KernelPreHandle implements HttpKernelInterface {
  
  /**
   * The wrapped HTTP kernel.
   *
   * @var \Symfony\Component\HttpKernel\HttpKernelInterface
   */
  protected $httpKernel;
  
  /**
   * The main Drupal kernel.
   *
   * @var \Drupal\Core\DrupalKernelInterface
   */
  protected $drupalKernel;
  
  /**
   * Constructs a new KernelPreHandle instance.
   *
   * @param \Symfony\Component\HttpKernel\HttpKernelInterface $http_kernel
   *   The wrapped HTTP kernel.
   * @param \Drupal\Core\DrupalKernelInterface $drupal_kernel
   *   The main Drupal kernel.
   */
  public function __construct(HttpKernelInterface $http_kernel, DrupalKernelInterface $drupal_kernel) {
    $this->httpKernel = $http_kernel;
    $this->drupalKernel = $drupal_kernel;
  }
  
  /**
   * {@inheritdoc}
   */
  public function handle(Request $request, $type = self::MAIN_REQUEST, $catch = TRUE) : Response {
    $this->drupalKernel
      ->preHandle($request);
    return $this->httpKernel
      ->handle($request, $type, $catch);
  }

}