Symfony 4 -- error when I try to create a Session Proxy - php

Question

I follow the instructions in https://symfony.com/doc/master/session/proxy_examples.html,
I update my framework.yaml
framework:
secret: '%env(APP_SECRET)%'
#default_locale: en
#csrf_protection: ~
#http_method_override: true
# uncomment this entire section to enable sessions
session:
# With this config, PHP's native session handling is used
handler_id: App\Session\CookieEncryptedSession
#esi: ~
#fragments: ~
php_errors:
log: true
I also create my ownclass:
<?php
namespace App\Session;
use Defuse\Crypto\Crypto;
use Defuse\Crypto\Key;
use Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy;
class CookieEncryptedSession extends SessionHandlerProxy
{
private $key;
public function __construct(\SessionHandlerInterface $handler, Key $key)
{
$this->key = $key;
parent::__construct($handler);
}
public function read($id)
{
$data = parent::read($id);
return Crypto::decrypt($data, $this->key);
}
public function write($id, $data)
{
$data = Crypto::encrypt($data, $this->key);
return parent::write($id, $data);
}
}
When I try to run the server with the console I get this error:
In CheckCircularReferencesPass.php line 67:
Circular reference detected for service "App\Session\CookieEncryptedSession
", path: "App\Session\CookieEncryptedSession -> App\Session\CookieEncrypted
Session".
Any idea where is the mistake?
Thanks
Oskar

Answer 1

The autowiring is trying to inject the service to itself as the service implements the interface required on the constructor. CookieEncryptedSession implements SessionHandlerInterface via:
class SessionHandlerProxy extends AbstractProxy implements \SessionHandlerInterface
Setup in your services the service: CookieEncryptedSession manually so you can select the SessionHandlerInterface service you want.
NativeSessionHandler
NativeFileSessionHandler
DbalSessionHandler
Etc