C#HTTPエージェントがSocketにアクセスしてメールを取得

C#HTTPエージェントがSocketにアクセスしてメールを取得
キー・スルー・エージェントのコード(HTTPエージェントによるTcpClentの取得)

public class ClientHelper

    {

        public static TcpClient connectViaHTTPProxy(

            string targetHost,

            int targetPort,

            string httpProxyHost,

            int httpProxyPort,

            string proxyUserName,

            string proxyPassword)

        {

            var uriBuilder = new UriBuilder

            {

                Scheme = Uri.UriSchemeHttp,

                Host = httpProxyHost,

                Port = httpProxyPort

            };



            var proxyUri = uriBuilder.Uri;



            var request = WebRequest.Create(

                "http://" + targetHost + ":" + targetPort);



            var webProxy = new WebProxy(proxyUri);



            request.Proxy = webProxy;

            request.Method = "CONNECT";



            var credentials = new NetworkCredential(

                proxyUserName, proxyPassword);



            webProxy.Credentials = credentials;



            var response = request.GetResponse();



            var responseStream = response.GetResponseStream();

            Debug.Assert(responseStream != null);



            const BindingFlags Flags = BindingFlags.NonPublic | BindingFlags.Instance;



            var rsType = responseStream.GetType();

            var connectionProperty = rsType.GetProperty("Connection", Flags);



            var connection = connectionProperty.GetValue(responseStream, null);

            var connectionType = connection.GetType();

            var networkStreamProperty = connectionType.GetProperty("NetworkStream", Flags);



            var networkStream = networkStreamProperty.GetValue(connection, null);

            var nsType = networkStream.GetType();

            var socketProperty = nsType.GetProperty("Socket", Flags);

            var socket = (Socket)socketProperty.GetValue(networkStream, null);



            return new TcpClient { Client = socket };

        }

    }

原文住所:http://www.replicator.org/journal/201011170043-net-connecting-a-tcpclient-through-an-http-proxy-with-authentication