Question

I have a blog which generates URLs like:

/article-name
/my-article
/other-article

Then there is a forum with threads using URLs like:

/thread-name
/my-thread
/what-do-you-think

How can I make router to handle this situation? I don’t want to use any more URL parameters (like /blog/article-name and /forum/thread-name). Best way would be first asking blog controller whether there is an article with this URL and if doesn’t, ask the forum controller. But how?

Answer 1

You have to define your event listener.

services:
    kernel.listener.subdomain_listener:
        class: Path\To\YourListener\RequestListener
        scope: request
        tags:
           - { name: kernel.event_listener, event: kernel.request, method: onKernelRequest }

Then, in your RequestListener you should define onKernelRequest() method and put there your route handling, such as

public function onKernelRequest(GetResponseEvent $event)
{
    if ($event->getRequestType() !== \Symfony\Component\HttpKernel\HttpKernel::MASTER_REQUEST) {
        return;
    }

    //... check if article exists, otherwise forward to blog controller
}

For additional information about event listeners you could refer to the documenation:

http://symfony.com/doc/current/cookbook/service_container/event_listener.html
http://symfony.com/doc/2.0/cookbook/doctrine/event_listeners_subscribers.html