MVC 4 Web API寄存器过滤器

I am using MVC 4 Web API to create a service layer for an application. I am trying to create a global filter that will act on all incoming requests to the API. Now I understand that this has to be configured differently than standard MVC global action filters. But I'm having issues getting any of the examples I'm finding online to work.I am using MVC 4 Web API to create a service la