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);
    }

}