private RefreshResult GetNewSessionCredentials()

in aliyun-net-credentials/Provider/URLCredentialProvider.cs [130:172]
39 lines of code
6 McCabe index (conditional complexity)

        private RefreshResult<CredentialModel> GetNewSessionCredentials(IConnClient client)
        {
            HttpRequest httpRequest = new HttpRequest(credentialsURI.ToString());
            httpRequest.SetCommonUrlParameters();
            httpRequest.Method = MethodType.GET;
            httpRequest.ConnectTimeout = connectTimeout;
            httpRequest.ReadTimeout = readTimeout;
            HttpResponse httpResponse;

            try
            {
                httpResponse = client.DoAction(httpRequest);
            }
            catch (Exception e)
            {
                throw new CredentialException("Failed to connect Server: " + credentialsURI.ToString() + e.ToString());
            }

            if (httpResponse.Status >= 300 || httpResponse.Status < 200)
            {
                throw new CredentialException("Failed to get credentials from server: " + credentialsURI.ToString() +
                "\nHttpCode=" + httpResponse.Status +
                "\nHttpRAWContent=" + httpResponse.GetHttpContentString());
            }

            Dictionary<string, string> map =
                JsonConvert.DeserializeObject<Dictionary<string, string>>(httpResponse.GetHttpContentString());
            if (map.ContainsKey("Code") && DictionaryUtil.Get(map, "Code") == "Success")
            {
                string expirationStr = DictionaryUtil.Get(map, "Expiration").Replace('T', ' ').Replace('Z', ' ');
                var dt = Convert.ToDateTime(expirationStr);
                long expiration = dt.GetTimeMillis();
                CredentialModel credentialModel = new CredentialModel
                {
                    Expiration = expiration,
                    Type = AuthConstant.CredentialsURI,
                    ProviderName = GetProviderName()
                };
                return new RefreshResult<CredentialModel>(credentialModel, GetStaleTime(expiration));
            }

            throw new CredentialException(JsonConvert.SerializeObject(map));
        }