AK.F1.Timing.Live.Encryption.LiveDecrypterFactory.GetSeedForSession C# (CSharp) Method

        protected override int GetSeedForSession(string sessionId)
        {
            Guard.NotNullOrEmpty(sessionId, "sessionId");

            int seed;
            string response;
            Uri seedUri = MakeSeedUri(sessionId);

            Log.InfoFormat("fetching seed from {0}", seedUri);
            try
            {
                response = seedUri.GetResponseString(HttpMethod.Get);
            }
            catch(IOException exc)
            {
                Log.Error(exc);
                throw Guard.LiveDecrypterFactory_FailedToFetchSessionSeed(exc);
            }
            if(response.Equals("invalid", StringComparison.OrdinalIgnoreCase))
            {
                Log.Error("failed to fetch the seed as the authentication token has been rejected");
                throw Guard.LiveDecrypterFactory_AuthenticationTokenRejected();
            }
            if(!int.TryParse(response, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out seed))
            {
                Log.ErrorFormat("failed to parse seed from {0}", response);
                throw Guard.LiveDecrypterFactory_UnableToParseSeed(response);
            }

            return seed;
        }