/// <summary>
        /// 通过POST方式发送数据
        /// </summary>
        /// <param name="Url">url</param>
        /// <param name="postDataStr">Post数据</param>
        /// <param name="cookie">Cookie容器</param>
        /// <returns></returns>
        public static string SendDataByPost(string Url, string postDataStr, string cookie, string host, string referer)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            System.Net.ServicePointManager.Expect100Continue = false;
            if (!string.IsNullOrEmpty(cookie))
            {
                request.Headers.Set(HttpRequestHeader.Cookie, $"{cookie}");
            }
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
            //  request.Connection = "keep-alive";
            request.Accept = "application/json, text/javascript, */*; q=0.01";
            request.Host = host;
            request.Referer = referer;
            request.UserAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Maxthon/5.0 Chrome/61.0.3163.79 Safari/537.36";
            request.ContentLength = postDataStr.Length;
            Stream myRequestStream = request.GetRequestStream();
            StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
            myStreamWriter.Write(postDataStr);
            myStreamWriter.Close();
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
            string retString = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            myResponseStream.Close();

            return retString;
        }


 static public string Get(string url, string cookie = null, string referer = null)
        {
            //创建请求
            System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; //加上这一句
            HttpWebRequest request = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create(url);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            //GET请求
            string retString;
            request.Method = "GET";
            request.ReadWriteTimeout = 3000;//读写超时
            try
            {
                request.ContentType = "x-www-form-urlencoded;charset=UTF-8";
                if (!string.IsNullOrEmpty(cookie))
                {
                    request.Headers.Set(HttpRequestHeader.Cookie, $"{cookie}");
                }
                if (!string.IsNullOrEmpty(referer))
                {
                    request.Referer = referer;
                }
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();//执行get请求
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("UTF-8"));
                retString = myStreamReader == null ? "Error" : myStreamReader.ReadToEnd();
                myStreamReader.Close();
            }
            catch (WebException e)
            {
                retString = e.Message;
            }
            //返回内容JSON
            return retString;
        }