Why is my Castle Windsor controller factory's GetControllerInstance() being called with a null value?

Question

I am using Castle Windsor to manage controller instances (among other things). My controller factory looks like this:

public class WindsorControllerFactory : Def         


        

Answer 1

It turns out that the second request was the MVC framework trying to find a script I included in the Site.Master. The path did not exist, so I guess it tried to resolve a controller (that matched /Scripts/sitescripts.js). I changed the method to this:

protected override IController GetControllerInstance(Type controllerType)
{
    if (controllerType != null)
    {
       return (IController)_container.Resolve(controllerType);
    }
    else
    {
       return base.GetControllerInstance(controllerType);
    }
}

And an exception with an understandable message was thrown.