Attaching events to Session OnStart and OnEnd using HttpModules

Question

Does anyone know a clean way of adding events to Session's OnStart and OnEnd events using an HttpModule (without touching the Global.asax file)?

Answer 1

public void Init(HttpApplication app)
{
   var ssm = app.Modules["Session"] as SessionStateModule;
   ssm.Start += Foo;
   ssm.End += Bar;
}

Answer 2

Session OnStart behavior can be emulated by - in one of your HttpModule´s request events - checking if HttpContext.Current.Session.IsNewSession is set to true.

However there's one pitfall! If not a value is set in the Session object, the next request will have a positive value as IsNewSession. So once you possitively checked for IsNewSession you should set any value in a Session object.