ASP.NET MVC RequireHttps

How do I use the ASP.NET MVC 2 Preview 2 Futures RequireHttps attribute?

I want to prevent unsecured HTTP requests from being sent to an action method. I want to automatically redirect to HTTPS.

MSDN:

• RequireHttpsAttribute
• RequireHttpsAttribute Members
• RequireHttpsAttribute.HandleNonHttpsRequest Method

How do I use this feature?

My guess:

[RequireHttps] //apply to all actions in controller
public class SomeController 
{
  //... or ...
  [RequireHttps] //apply to this action only
  public ActionResult SomeAction()
  {
  }

}