TrustedHostsTestController.php

<?php

namespace Drupal\trusted_hosts_test\Controller;

use Symfony\Component\HttpFoundation\Request;

/**
 * Provides a test controller for testing the trusted hosts setting.
 */
class TrustedHostsTestController {
    
    /**
     * Creates a fake request and prints out its host.
     */
    public function fakeRequestHost() {
        $request = Request::create('/');
        return [
            '#markup' => 'Host: ' . $request->getHost(),
        ];
    }
    
    /**
     * Creates a fake request and prints out the class name of the specified bag.
     */
    public function bagType($bag) {
        $request = Request::create('/');
        return [
            '#markup' => 'Type: ' . get_class($request->{$bag}),
        ];
    }

}