Akamai.EdgeGrid.Auth.EdgeGridV1Signer.Validate C# (CSharp) Method

        public void Validate(WebResponse response)
        {
            if (response is HttpWebResponse)
            {
                HttpWebResponse httpResponse = (HttpWebResponse)response;
                if (httpResponse.StatusCode == HttpStatusCode.OK)
                    return;

                DateTime responseDate;
                string date = response.Headers.Get("Date");
                if (date != null
                    && DateTime.TryParse(date, out responseDate))
                    if (DateTime.Now.Subtract(responseDate).TotalSeconds > 30)
                        throw new HttpRequestException("Local server Date is more than 30s out of sync with Remote server");

                string responseBody = null;
                using (var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    responseBody = reader.ReadToEnd();
                    // Do something with the value
                }

                throw new HttpRequestException(string.Format("Unexpected Response from Server: {0} {1}\n{2}\n\n{3}", httpResponse.StatusCode, httpResponse.StatusDescription, response.Headers, responseBody));
            }
        }

        public void TestAPIActionValidateDateDrift()
        {
            string TestURIProtocol = "asdf";

            WebRequest.RegisterPrefix(TestURIProtocol, new WebRequestTestCreate());
            var request = (HttpWebRequestTest)WebRequest.Create("asdf://www.example.com/");


            var signer   = new EdgeGridV1Signer();
            var response = request.CreateResponse(HttpStatusCode.ServiceUnavailable, "Server Unavailable");

            var currentDate = DateTime.UtcNow.AddMinutes(-2);
            var headers     = new WebHeaderCollection {
                { "Date", currentDate.ToString("r") }
            };

            response = request.CreateResponse(HttpStatusCode.ServiceUnavailable, "Server Unavailable", headers);
            try
            {
                signer.Validate(response);
            }
            catch (Exception ex)
            {
                Assert.AreEqual(ex.Message, "Local server Date is more than 30s out of sync with Remote server");
                throw ex;
            }
        }