public static string PostLogin(this string url, ref CookieContainer cookieContainer, string paramData)        {            HttpWebRequest request = null;            HttpWebResponse response = null;            Stream responseStream = null;            try            {                 byte[] byteArray = Encoding.UTF8.GetBytes(paramData); ; //转化                request = (HttpWebRequest)WebRequest.Create(url);                request.CookieContainer = cookieContainer;                request.ContentType = "application/x-www-form-urlencoded";                request.Referer = new Uri(url).Host;                request.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";                request.ContentLength = byteArray.Length;                request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.110 Safari/537.36";                request.Method = "POST";                Stream newStream = request.GetRequestStream();                newStream.Write(byteArray, 0, byteArray.Length);                response = (HttpWebResponse)request.GetResponse();                Encoding encoding = Encoding.GetEncoding("utf-8");                StreamReader reader = new StreamReader(response.GetResponseStream(), encoding);                string str = reader.ReadToEnd();                cookieContainer = request.CookieContainer;                reader.Close();                return str;            }            catch (Exception)            {                if (responseStream != null)                    responseStream.Close();                if (response != null)                    response.Close();                return string.Empty;            }        }

 public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        { // 总是接受
            return true;
        }



 public static string GetHtml(this string url,ref CookieContainer cookieContainer)        {            ServicePointManager.DefaultConnectionLimit = 1024;            ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);//验证服务器证书回调自动验证            string str = "";            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);            request.CookieContainer = cookieContainer;            request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.110 Safari/537.36";            request.ContentType = "application/x-www-form-urlencoded";            request.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";                      HttpWebResponse response = (HttpWebResponse)request.GetResponse();                       request.AllowAutoRedirect = true;           request.Method = "GET";            // request.CookieContainer = null;             request.Timeout = 60;            request.Referer = url;                      Encoding encoding = Encoding.GetEncoding(response.CharacterSet);            try            {                using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding))                {                    str = reader.ReadToEnd();                }            }            catch            {            }            finally            {                if (request != null)                {                    request.Abort();                }            }            return str;        }

 public static void CookieStr2CookieContainer(this string cookiestr, ref CookieContainer cc, string domain)        {            if (cc == null)                cc = new CookieContainer();            string[] cookstr = cookiestr.Split(‘;‘);            foreach (string str in cookstr)            {                string[] cookieNameValue = http://www.mamicode.com/str.Split(‘=‘);"m_domainTable",                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.GetField |                System.Reflection.BindingFlags.Instance, null, cc, new object[] { });            foreach (object pathList in table.Values)            {                SortedList lstCookieCol = (SortedList)pathList.GetType().InvokeMember("m_list",                    System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.GetField                    | System.Reflection.BindingFlags.Instance, null, pathList, new object[] { });                foreach (CookieCollection colCookies in lstCookieCol.Values)                    foreach (Cookie c in colCookies) lstCookies.Add(c);            }            return lstCookies;        }