public static string RequestWebServerByTCP(Uri uri, string method, NameValueCollection parameter, string cookie, Encoding encoding){try{StringBuilder RequestHeaders = new StringBuilder();RequestHeaders.Append(method + " " + uri.PathAndQuery + " HTTP/1.1\r\n");method = method.ToUpper();if (method == POSTMETHOD)RequestHeaders.Append("Content-Type:application/x-www-form-urlencoded\r\n");RequestHeaders.Append("User-Agent:Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11\r\n");RequestHeaders.Append("Cookie:" + cookie + "\r\n");RequestHeaders.Append("Accept:*/*\r\n");RequestHeaders.Append("Host:" + uri.Host + "\r\n");byte[] postdata = null;StringBuilder sb = new StringBuilder();if (method == GETMETHOD){uri = GetMethodQueryString(uri, parameter, encoding);}else if (method == POSTMETHOD){if (parameter != null){foreach (string key in parameter){sb.Append(string.Format(FORMATSTR1, System.Web.HttpUtility.UrlEncode(key, encoding), System.Web.HttpUtility.UrlEncode(parameter[key], encoding)));}}if (sb.Length != 0){sb = sb.Remove(sb.Length - 1, 1);}postdata = encoding.GetBytes(sb.ToString());RequestHeaders.Append("Content-Length:" + postdata.Length + "\r\n");}RequestHeaders.Append("Connection:close\r\n\r\n");byte[] req = Encoding.UTF8.GetBytes(RequestHeaders.ToString() + sb.ToString());int port = 443;MyTlsClient client = new MyTlsClient();var protocol = OpenTlsConnection(uri.Host, port, client);Stream tlsStream = protocol.Stream;tlsStream.Write(req, 0, req.Length);tlsStream.Flush();StreamReader reader = new StreamReader(tlsStream);String line;StringBuilder html = new StringBuilder();string firstLine = "";int i = 0;while ((line = reader.ReadLine()) != null){if (i == 0){firstLine = line;i++;}html.AppendLine(line);if (line.Contains("</html>")){break;}}protocol.Close();string httpstatusCode = "";string[] httpstatus = firstLine.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);if (httpstatus.Length > 2){httpstatusCode = httpstatus[1];}else{//请求无效httpstatusCode = "400";}return html.ToString();}catch{return "";}}

  class MyTlsClient : DefaultTlsClient{public override TlsAuthentication GetAuthentication(){return new MyTlsAuthentication();}}// Need class to handle certificate auth  class MyTlsAuthentication : TlsAuthentication{public TlsCredentials GetClientCredentials(CertificateRequest certificateRequest){// return client certificate  return null;}public void NotifyServerCertificate(Certificate serverCertificate){// validate server certificate
        }}

       internal static TlsClientProtocol OpenTlsConnection(string hostname, int port, TlsClient client){TcpClient tcp = new TcpClient(hostname, port);TlsClientProtocol protocol = new TlsClientProtocol(tcp.GetStream(), secureRandom);protocol.Connect(client);return protocol;}

      private static Uri GetMethodQueryString(Uri uri, NameValueCollection parameter, Encoding encoding){List<KeyValuePair<string, string>> parameter1 = new List<KeyValuePair<string, string>>();foreach (string key in parameter){parameter1.Add(new KeyValuePair<string, string>(key, parameter[key]));}return GetMethodQueryString(uri, parameter1, encoding);}private static Uri GetMethodQueryString(Uri uri, List<KeyValuePair<string, string>> parameter, Encoding encoding){string format = string.Empty;UriBuilder uribuilfer = new UriBuilder(uri);string QueryString = string.Empty;if (string.IsNullOrEmpty(uribuilfer.Query)){format = FORMATSTR1;}else{format = FORMATSTR2;}QueryString = uribuilfer.Query;if (parameter != null){foreach (KeyValuePair<string, string> item in parameter){QueryString += string.Format(format, System.Web.HttpUtility.UrlEncode(item.Key, encoding), System.Web.HttpUtility.UrlEncode(item.Value, encoding));}}QueryString = QueryString.TrimEnd(new char[] { '&' });QueryString = QueryString.TrimStart(new char[] { '?' });uribuilfer.Query = QueryString;uri = uribuilfer.Uri;return uri;}

GET https://www.baidu.com/ HTTP/1.1
Accept: text/html, application/xhtml+xml, */*
Accept-Language: zh-CN
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
Host: www.baidu.com
Cookie: BAIDUID=C1EFC3A3466AAAEBE74C6F6E7F413FA8:FG=1; BIDUPSID=C1EFC3A3466AAAEBE74C6F6E7F413FA8; PSTM=1525339270; BD_LAST_QID=12260391193367555241

HTTP/1.1 200 OK
Bdpagetype: 1
Bdqid: 0x9a1ff959000016d0
Cache-Control: private
Connection: Keep-Alive
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Cxy_all: baidu+77e5655ffd82ce31adf5edff251fc585
Date: Thu, 03 May 2018 09:21:10 GMT
Expires: Thu, 03 May 2018 09:21:03 GMT
Server: BWS/1.1
Set-Cookie: BDSVRTM=0; path=/
Set-Cookie: BD_HOME=0; path=/
Set-Cookie: H_PS_PSSID=1428_21080_20719; path=/; domain=.baidu.com
Strict-Transport-Security: max-age=172800
Vary: Accept-Encoding
X-Powered-By: HPHP
X-Ua-Compatible: IE=Edge,chrome=1
Transfer-Encoding: chunked

html