Get http referer URI from a view using twig - twig

Question

I want to know in Twig from what URI the user came. For example:
The user is on the page /en/terms-of-use ('app_default_terms')
User clicks on login
On the register page is a hidden input to send the user back from where he came <input type="hidden" name="_target_path" value="{{ get_uri_from_where_he_came() }}" />
He submits the form and is sent back.
My question is, what is the twig function for this?

Answer 1

Using symfony framework, you can access a special global variable app which hold the request among other attributes.
see http://symfony.com/doc/current/book/templating.html#global-template-variables
So you could use something like :
{% set referer = app.request.server.get('http-referer')|default('/') %}
<input type="hidden" name="_target_path" value="{{ referer }}" />

Answer 2

My suggestion is a bit over-killing but ensures that you don't rely on arbitrary data coming from users.
The idea
You always save the previous route on your application using an event listener; and you implement a /reload path that will send the user back to that route. On login success, you just have to redirect your user to that /reload path and you're good to go.
The implementation
Change namespaces to fit with your application.
LastRouteListener.php
<?php
namespace Fuz\QuickStartBundle\EventListener;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Fuz\QuickStartBundle\Services\Routing;
class LastRouteListener implements EventSubscriberInterface
{
protected $routing;
public function __construct(Routing $routing)
{
$this->routing = $routing;
}
public function onKernelRequest(GetResponseEvent $event)
{
$request = $event->getRequest();
if (!$request->hasPreviousSession()) {
return;
}
try {
$currentRoute = $this->routing->getCurrentRoute($request);
} catch (ResourceNotFoundException $ex) {
return;
}
if (is_null($currentRoute)) {
return;
}
$session = $request->getSession();
$previousRoute = $session->get('current_route', array());
if ($currentRoute == $previousRoute) {
return;
}
$session->set('previous_route', $previousRoute);
$session->set('current_route', $currentRoute);
}
public static function getSubscribedEvents()
{
return array(
KernelEvents::REQUEST => array(array('onKernelRequest', 15)),
);
}
}
services.yml
parameters:
# ...
quickstart.last_route.listener.class: Fuz\QuickStartBundle\EventListener\LastRouteListener
services:
# ...
quickstart.last_route.listener:
class: %quickstart.last_route.listener.class%
arguments: [#quickstart.routing]
tags:
- { name: kernel.event_subscriber }
ReloadController.php
<?php
namespace Fuz\QuickStartBundle\Controller;
use Symfony\Component\HttpFoundation\Request;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Fuz\QuickStartBundle\Base\BaseController;
class ReloadController extends BaseController
{
/**
* Get back to the previous route
*
* #Route("/reload", name="reload")
* #Method({"GET"})
*/
public function reloadAction(Request $request)
{
if ($request->getSession()->has('previous_route')) {
$route = $request->getSession()->get('previous_route');
$route['params']['_locale'] = $request->getLocale();
return $this->redirect($this->generateUrl($route['name'], $route['params']));
}
return $this->redirect($this->generateUrl('home'));
}
}
Live
You can clone "symfony-quickstart" from my GitHub if you want to see this implementation live.
https://github.com/ninsuo/symfony-quickstart

Answer 3

Symfony 5.4
This worked for me.
app.request.headers.get('referer')