Symfony - 预登录事件监听器

Question

I need to do some actions before the login process/at the beginning of the login process. Is there any pre login event or how can I implement it?

I'am using Symfony3 and I have a form login and OAuth login (HWIOAuthBundle).

I tried this, but it doesn't work with OAuth login. Or how can I implement it for OAuth login too?

Answer 1

Generally all login stuff in symfony is executed by a listener to the kernel.request event, mostly within the Firewall listener of the Symfony security component. I did not use the HWIOAuthBundle bundle yet, but it seems it also just uses the Symfony Security component.

If you just want to execute certain actions before the login/authentication happens, you only need to register an event listener to the kernel.request with a higher priority than the Firewall listener.

You can do that as described in the Symfony docs (Events and Event Listeners). First create your Event listener class in src/AppBundle/EventListener/YourListener.php:

namespace AppBundle\EventListener;

use Symfony\Component\HttpKernel\Event\GetResponseEvent;

class YourListener
{
    public function onKernelRequest(GetResponseEvent $event)
    {
        // do stuff
    }
}

Then register your service in your app/config/services.yml file:

services:
    AppBundle\EventListener\YourListener:
        tags:
            - { name: kernel.event_listener, event: kernel.request, priority: 9 }

According to this page the Firewall has a priority of 8. So the priority of your event listener should be higher than that to be executed before the login happens (I used 9 in the example above).