Senparc.Weixin.HttpUtility.RequestUtility.HttpGetAsync C# (CSharp) Méthode

        public static async Task<string> HttpGetAsync(string url, CookieContainer cookieContainer = null, Encoding encoding = null, X509Certificate cer = null, int timeOut = Config.TIME_OUT)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.Timeout = timeOut;
            request.Proxy = _webproxy;
            if (cer != null)
            {
                request.ClientCertificates.Add(cer);
            }

            if (cookieContainer != null)
            {
                request.CookieContainer = cookieContainer;
            }

            HttpWebResponse response = (HttpWebResponse)(await request.GetResponseAsync());

            if (cookieContainer != null)
            {
                response.Cookies = cookieContainer.GetCookies(response.ResponseUri);
            }

            using (Stream responseStream = response.GetResponseStream())
            {
                using (StreamReader myStreamReader = new StreamReader(responseStream, encoding ?? Encoding.GetEncoding("utf-8")))
                {
                    string retString = await myStreamReader.ReadToEndAsync();
                    return retString;
                }
            }
        }

        /// <summary>
        /// 异步GetJsonA
        /// </summary>
        /// <param name="url"></param>
        /// <param name="encoding"></param>
        /// <param name="maxJsonLength">允许最大JSON长度</param>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        /// <exception cref="ErrorJsonResultException"></exception>
        public static async Task <T> GetJsonAsync <T>(string url, Encoding encoding = null, int?maxJsonLength = null)
        {
            string returnText = await RequestUtility.HttpGetAsync(url, encoding);

            JavaScriptSerializer js = new JavaScriptSerializer();

            if (maxJsonLength.HasValue)
            {
                js.MaxJsonLength = maxJsonLength.Value;
            }

            if (returnText.Contains("errcode"))
            {
                //可能发生错误
                WxJsonResult errorResult = js.Deserialize <WxJsonResult>(returnText);
                if (errorResult.errcode != ReturnCode.请求成功)
                {
                    //发生错误
                    throw new ErrorJsonResultException(
                              string.Format("微信请求发生错误！错误代码：{0}，说明：{1}",
                                            (int)errorResult.errcode, errorResult.errmsg), null, errorResult, url);
                }
            }

            T result = js.Deserialize <T>(returnText);

            return(result);
        }