Symfony 为注销路由添加逻辑

Question

In a Symfony 5.0 Application I want to add custom logic for cleanup reasons when the user loggs out. What I have currenty is what is described in the docs:

https://symfony.com/doc/current/security.html#logging-out

As the logout() function in the SecurityController is intercepted by Symfony it won't work to add logic there.

So - where CAN I add logic which is allways executed when a user loggs out? Couldn't find anything in the docs so far...

Answer 1

IMHO the best option is to implement the LogoutHandlerInterface referenced slightly indirectly on the symfony docs you mentioned (it mentions the LogoutSuccessHandlerInterface , which has a comment regarding the LogoutHandlerInterface : "If you want to only perform some logout related clean-up task, use the LogoutHandlerInterface instead.")

To me, it feels like an event handler, but it doesn't use the event system, so ... whatever.

Nevertheless, the arguments provided to your LogoutHandler will receive a TokenInterface which has TokenInterface::getUser() which returns the current user. (dependency injection on the constructor should provide you with additional services and stuff)

The alternative would be to implement an EventListener for the kernel request event - which the LogoutListener of the symfony/security package uses to manage logouts. You would have to add the same logic as the LogoutListener and probably have to make it trigger before the LogoutListener , this is however a slightly more convoluted way and I would really use the LogoutHandler .