Creating a dynamic redirect page

Controllers for routes in Drupal can return request objects provided by the Symfony HttpFoundation component instead of a render array. When a response object is returned, the render system is bypassed and the response object is handled directly.

In this recipe, we will create a route that redirects authenticated users to the homepage and anonymous users to the user login form.

How to do it…

1. First, we need to create the src/Controller directory in the module’s directory. We will put our controller class in this directory, which gives our controller class the Controller namespace:

   mkdir -p src/Controller

2. Create a file named RedirectController.php in the Controller directory. This will hold our RedirectController controller class.
3. Our RedirectController class will extend the ControllerBase base class provided by Drupal core:

   <?php

   namespace Drupal\mymodule\Controller;

   use Drupal\Core\Controller\ControllerBase;

   class RedirectController...