php__symfony__book/src/Controller/DefaultController.php

<?php

namespace App\Controller;

use App\GreetingGenerator;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;

class DefaultController extends AbstractController {

  /**
   * @return \Symfony\Component\HttpFoundation\Response
   *
   * @Route("/",
   *   name="front"
   * )
   * @Route("/hello",
   *   name="front_hello"
   * )
   */
  public function index() {
    return $this->render('hello.html.twig', ["message" => "Hello!"]);
  }

  /**
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *
   * @\Symfony\Component\Routing\Annotation\Route(
   *   name = "front_too",
   *   path = "/front"
   * )
   */
  public function frontToo() {
    // As per RFC 7231 § 7.1.2, relative URLs are allowed. Try /front#foo !
    // Never use a user-supplied URL without integrity checks:
    // https://www.owasp.org/index.php/Open_redirect
    // That's why Drupal has TrustedRedirectResponse and checks.
    return $this->redirect('/');
  }

  /**
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *
   * @\Symfony\Component\Routing\Annotation\Route(
   *   name = "blog_42",
   *   path = "/question"
   * )
   */
  public function blog42() {
    // Notice how the matching route will actually be blog_list, because once
    // the redirect is sent, the browser has no notion of the initially
    // requested route name and parameters, and routing just receives an URL,
    // matching it without knowledge of the initial URL generation choices.
    return $this->redirectToRoute('blog_show', ['slug' => 42]);
  }

  /**
   * @param $name
   * @param \App\GreetingGenerator $generator
   *
   * @return \Symfony\Component\HttpFoundation\Response
   *
   * @Route(
   *  name="hello_html",
   *  path="/hello/{name}"
   * )
   */
  public function hello($name, GreetingGenerator $generator) {
    $greeting = $generator->getRandomGreeting();
    return new Response("$greeting $name");
  }

  /**
   * @param $name
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *
   * @Route("/json/{name}",
   *   name="hello_json",
   * )
   */
  public function helloJson($name) {
    return $this->json([
      'name' => $name,
    ]);
  }
}