Adding resource links in ASP.NET Web Api payloads

gistfile1.cs

    public class ResourceLinksActionFilterAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {
            ResourceModel payload;
            if (actionExecutedContext.Response.TryGetContentValue<ResourceModel>(out payload))
            {
                payload.BuildResourceLinks(actionExecutedContext.Request);
            }
            
            base.OnActionExecuted(actionExecutedContext);
        }
    }

    public class ResourceModel
    {
        public ICollection<Link> Links { get; set; }

        public ResourceModel()
        {
            Links = new List<Link>();
        }
        
        public virtual void BuildResourceLinks(HttpRequestMessage request)
        {
            AddSelfLink(request);
        }

        protected void AddSelfLink(HttpRequestMessage request)
        {
            Links.Add(new Link { Rel = "Self", Href = request.RequestUri.AbsoluteUri });
        }
    }