Custom message handler with attribute based routing is not working for Web API 2

Question

I have a Message Handler in my Web API 2 project which change the url to a different path. Such as url "root/controller/somevalue/detials" will be changed to "root/controller/2/details" . Where "somevalue" or 2 is a parameter for the action method.

I have placed the message handler registration code before calling config.MapHttpAttributeRoutes(); Message handler is registered as config.MessageHandlers.Add(new MyHandler());

For normal route mapping it is working fine. But if I enable attribute based routing then the message handler is called and changed the url but action method is hit with the same "somevalue" not "2".

What is happening here?

Answer 1

If you are using RouteAttribute , then you can have Route value like this for capturing somevalue :

Route["details/{somevalue}"]
public IHttpActionResult MyCustiomApiMethod(string somevalue)
{
    //return 
}