remoting 开发 利用http通过代理

前段时间,在公司做了个Remoting 的程序,主要是验证http通道与tcp通道的通信方法与性能.

刚开始,我做了个Server,利用Iss做宿主,(Server,Client都在公司网域内)

可发现在局域网(访问外网需要通过代理服务器),利用http通道提示我需要 通过代理验证,才能访问,几经周折,在网上查了好几天,终于找出利用http通道可以通过代理访问,以下是我在客户端的注册代理程序代码

            System.Net.WebProxy wp = new System.Net.WebProxy(代理服务器:端口)
            wp.BypassProxyOnLocal = false;
            wp.Credentials = new NetworkCredential(username, pwd, 域);
            System.Net.GlobalProxySelection.Select = wp;
            //TcpChannel channel = new TcpChannel();
            //ChannelServices.RegisterChannel(channel);
            //channel = (TcpChannel)ChannelServices.GetChannel("tcp");
            //SetChannelProxy(channel, wp);
            HttpChannel theChannel = new HttpChannel();
            ChannelServices.RegisterChannel(theChannel);
            theChannel = (HttpChannel)ChannelServices.GetChannel("http");
            setChannelProxy(theChannel, wp);

        private static void setChannelProxy(HttpChannel channel, IWebProxy proxy)
        {
            //if configuration not set proxyserver then set channel's proxyName Properties to null

            if (proxy == null)
            {
                //channel.Properties["proxyName"] = null;
                //saveProxyToReg(null,null,null,null,null);
                return;
            }
            //channel.Properties["proxyName"]=null;
            //use reflection to set the channel's proxyObject
            FieldInfo clientChannelFieldInfo =
             typeof(HttpChannel).GetField("_clientChannel",
             BindingFlags.Instance | BindingFlags.NonPublic);

            HttpClientChannel clientChannel = (HttpClientChannel)
             clientChannelFieldInfo.GetValue(channel);

            FieldInfo x =typeof(HttpClientChannel).GetField  ("_proxyObject",BindingFlags.Instance|BindingFlags.NonPublic  );

            x.SetValue(clientChannel, proxy);

            // use GlobalProxySelection to set other web request
            GlobalProxySelection.Select = proxy;
        }

可问题是,我在客户端利用http通道访问外网时,每次返回竟然需要2-3秒钟,这种速度是我不能接受的,(不知是程序原因还是别哪个地方需要改进,可我的程序非常简单,只需要返回一个字符,也需要这么长时间,是不是利用iis做宿主,速度会慢一些,因为iis 的安全机制等原因???,),听说利用tcp通道,速度很快,而且不需要通过代理就可以访问外网,

于是我在客户端利用tcp 通道访问外网,可提示我目标机器连不上等错误,我刚开始以为tcp也需要代理验证,可一查证,tcp通道根本没有注册代理的方法,几经辗转,后来发现是局域网的防护墙搞的鬼,只需在防护墙中新增一个协议,开设一个端口出站访问外网即可.