Symfony: How to load all paths from the same Index route (to use dynamic routing in a React SPA) - reactjs

Question

I'm creating a SPA backed by Symfony and ApiPlatform so I want to always load my main route despite the real path of the URL.
I want something like this:
/**
* {#inheritdoc}
*/
class DefaultController extends Controller
{
/**
* #Route("/*", name="homepage")
*
* #return Response
*/
public function indexAction(): Response
{
// replace this example code with whatever you need
return $this->render('default/index.html.twig');
}
}
In my intentions, also if the URL is something like /path/to/the/spa/page I want to anyway load the DefaultController::indexAction()route.
How to do this? (obviously the provided example doesn't work).

Answer 1

Ok, I've found the solution after an "illumination".
I remembered that there is the possibility to rewrite all URL adding or removing the trailing slash
Reading that article I saw this:
class RedirectingController extends Controller
{
/**
* #Route("/{url}", name="remove_trailing_slash",
* requirements={"url" = ".*\/$"})
*/
public function removeTrailingSlash(Request $request)
{
// ...
}
}
So, to intercept all URL despite the path, my DefaultController::indexAction() becomes this:
class DefaultController extends Controller
{
/**
* #Route("/{url}",requirements={"url"=".*"}, name="homepage")
*
* #return Response
*/
public function indexAction(): Response
{
// replace this example code with whatever you need
return $this->render('default/index.html.twig');
}
}
Now all URL are all handled by DefaultController::indexAction() despite the URL path.

Answer 2

I would recommend you to use symfony's event system instead.
Subscribe to either kernel.request or kernel.router events.
In case of kernel.request you have to overtake the Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelRequest()
which priotiry is 32 (use 33 at least).
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;
class SpaSubscriber implements EventSubscriberInterface
{
public static function getSubscribedEvents()
{
return [
KernelEvents::REQUEST => ['onKernelRequest', 33],
];
}
public function onKernelRequest(RequestEvent $event)
{
$request = $event->getRequest();
if (!$request->isXmlHttpRequest()) {
$html = $this->twig->render('spa.html.twig', [
'uri' => $request->getUri(),
]);
$response = new Response($html, Response::HTTP_OK);
$event->setResponse($response);
}
}
}
In case of kernel.router use priority 1 at least.
You can use the php bin/console debug:event-dispatcher command to find out which listeners are registered for events and their priorities.