Form posting in DD4T, post for as normal url

DD4TFormRouteHandler.cs

  public class DD4TFormRouteHandler : MvcRouteHandler
    {
        protected override IHttpHandler GetHttpHandler(RequestContext requestContext)
        {
            string encodedVal;

            switch (requestContext.HttpContext.Request.RequestType)
            {
                case "POST":
                    encodedVal = requestContext.HttpContext.Request.Form["tprt"];
                    break;
                case "GET":
                    encodedVal = requestContext.HttpContext.Request.QueryString["tprt"];
                    break;
                default:
                    return null;
            }
            if (!string.IsNullOrWhiteSpace(encodedVal))
            {
                string decryptedString;
                decryptedString = encodedVal.DecryptWithMachineKey();

                var parsedQueryString = HttpUtility.ParseQueryString(decryptedString);
                var decodedParts = new Dictionary<string, string>();

                foreach (var key in parsedQueryString.AllKeys)
                {
                    decodedParts[key] = parsedQueryString[key];
                }

                if (decodedParts.Count == 3)
                {
                    string controllerName = HttpUtility.UrlDecode(decodedParts.Single(x => x.Key == "c").Value);
                    string actionName = HttpUtility.UrlDecode(decodedParts.Single(x => x.Key == "a").Value);
                    string areaName = HttpUtility.UrlDecode(decodedParts.Single(x => x.Key == "ar").Value);
                    requestContext.RouteData.Values["action"] = actionName;
                    requestContext.RouteData.Values["controller"] = controllerName;
                    requestContext.RouteData.Values["area"] = areaName;
                }

            }
            return base.GetHttpHandler(requestContext);
        }
    }