// api/saft/ProductSales?vid=C0001&begin=2016-01-01&end=2017-01-01
        // api/saft/CustomerSpentValue?vid=PT505678900_C&begin=2016-01-01&end=2017-01-01
        // api/saft/AccountInRange?vid=11&begin=2016-01-01&end=2016-12-01
        public HttpResponseMessage Get(string id, string vid, string begin, string end)
        {
            HttpResponseMessage response = null;
            string body = "";


            switch (id)
            {
            case "ProductSales":
                body = MongoConnection.GetProductSales(vid, begin, end);
                break;

            case "CustomerSpentValue":
                body = MongoConnection.GetCustomerTotalSpent(vid, begin, end);
                break;
            }

            response         = this.Request.CreateResponse(HttpStatusCode.OK);
            response.Content = new StringContent(body, Encoding.UTF8, "application/json");

            return(response);
        }