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Documented the smart URL redirection
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‎routing.rst

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@@ -493,6 +493,8 @@ that are special: each adds a unique piece of functionality inside your applicat
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``_locale``
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Used to set the locale on the request (:ref:`read more <translation-locale-url>`).
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.. routing-trailing-slash-redirection:
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Redirecting URLs with Trailing Slashes
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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---------- ---------------------------------------- ------------------------------------------
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Route path If the requested URL is ``/foo`` If the requested URL is ``/foo/``
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---------- ---------------------------------------- ------------------------------------------
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``/foo`` It matches (``200`` status response) It doesn't match (``404`` status response)
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``/foo`` It matches (``200`` status response) It makes a ``301`` redirect to ``/foo``
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``/foo/`` It makes a ``301`` redirect to ``/foo/`` It matches (``200`` status response)
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---------- ---------------------------------------- ------------------------------------------
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In summary, adding a trailing slash in the route path is the best way to ensure
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that both URLs work. Read the :doc:`/routing/redirect_trailing_slash` article to
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learn how to avoid the ``404`` error when the request URL contains a trailing
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slash and the route path does not.
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.. note::
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If your application defines different routes for each path (``/foo`` and
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``/foo/``) then this automatic redirection doesn't take place and the right
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route is always matched.
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.. versionadded:: 4.1
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The automatic ``301`` redirection from ``/foo/`` to ``/foo`` was introduced
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in Symfony 4.1. In previous Symfony version this results in a ``404`` response.
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.. index::
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single: Routing; Controllers

‎routing/redirect_trailing_slash.rst

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Redirect URLs with a Trailing Slash
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===================================
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The goal of this article is to demonstrate how to redirect URLs with a
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trailing slash to the same URL without a trailing slash
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(for example ``/en/blog/`` to ``/en/blog``).
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Create a controller that will match any URL with a trailing slash, remove
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the trailing slash (keeping query parameters if any) and redirect to the
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new URL with a 308 (*HTTP Permanent Redirect*) response status code::
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// src/Controller/RedirectingController.php
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namespace App\Controller;
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use Symfony\Bundle\FrameworkBundle\Controller\Controller;
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use Symfony\Component\HttpFoundation\Request;
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class RedirectingController extends Controller
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{
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public function removeTrailingSlash(Request $request)
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{
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$pathInfo = $request->getPathInfo();
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$requestUri = $request->getRequestUri();
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$url = str_replace($pathInfo, rtrim($pathInfo, ' /'), $requestUri);
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8000 // 308 (Permanent Redirect) is similar to 301 (Moved Permanently) except
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// that it does not allow changing the request method (e.g. from POST to GET)
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return $this->redirect($url, 308);
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}
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}
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After that, create a route to this controller that's matched whenever a URL
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with a trailing slash is requested. Be sure to put this route last in your
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system, as explained below:
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.. configuration-block::
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.. code-block:: php-annotations
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// src/Controller/RedirectingController.php
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namespace App\Controller;
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use Symfony\Bundle\FrameworkBundle\Controller\Controller;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\Routing\Annotation\Route;
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class RedirectingController extends Controller
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{
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/**
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* @Route("/{url}", name="remove_trailing_slash",
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* requirements={"url" = ".*\/$"})
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*/
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public function removeTrailingSlash(Request $request)
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{
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// ...
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}
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}
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.. code-block:: yaml
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# config/routes.yaml
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remove_trailing_slash:
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path: /{url}
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controller: App\Controller\RedirectingController::removeTrailingSlash
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requirements:
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url: .*/$
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.. code-block:: xml
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<?xml version="1.0" encoding="UTF-8" ?>
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<routes xmlns="http://symfony.com/schema/routing">
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<route id="remove_trailing_slash" path="/{url}" methods="GET">
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<default key="_controller">App\Controller\RedirectingController::removeTrailingSlash</default>
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<requirement key="url">.*/$</requirement>
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</route>
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</routes>
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.. code-block:: php
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use Symfony\Component\Routing\RouteCollection;
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use Symfony\Component\Routing\Route;
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$routes = new RouteCollection();
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$routes->add(
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'remove_trailing_slash',
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new Route(
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'/{url}',
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array(
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'_controller' => 'App\Controller\RedirectingController::removeTrailingSlash',
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),
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array(
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'url' => '.*/$',
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)
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)
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);
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.. caution::
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Make sure to include this route in your routing configuration at the
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very end of your route listing. Otherwise, you risk redirecting real
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routes (including Symfony core routes) that actually *do* have a trailing
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slash in their path.
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In Symfony 4.1 the automatic URL redirection was improved as explained in
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:ref:`routing-trailing-slash-redirection`. That's why you no longer need to
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do that redirection yourself and this article has been removed because it's
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no longer needed.

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