How to disable trailing slash redirect in Symfony 4.1?

Question

I'd like to disable default Symfony 4.1 behavior that redirects users from /foo/ to /foo. What's the best way to disable this behavior? I'm developing API so I don't need these redirects.

Answer 1

@NicolasB's solution is too hacky, so I've created custom event listener that checks all responses with redirects and converts them to 404 error:

<?php

namespace App\EventListener;

use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class RedirectionListener
{
    public function onKernelResponse(FilterResponseEvent $event): void
    {
        $response = $event->getResponse();

        if ($response->isRedirection()) {
            throw new NotFoundHttpException();
        }
    }
}

Don't forget to register it:

App\EventListener\RedirectionListener:
  tags:
  - { name: kernel.event_listener, event: kernel.response }

Note: all redirects will be converted to 404s, not only trailing slash redirects. You should keep it in mind. However I am developing API, so I don't need any redirects at all, so this solution solves my problem.

If you know better solution you're welcome to post another reply!