C# 关于代理检测的问题(难,真的难)?

hwj383 2008-07-17 06:41:42

现在一个程序
通过我自已写的方法来判断是代理是否正常工作,核心代码如下:

public void Connect(string server, int port, Proxy proxy, ConnectCallBack callback)

{

    this._client = new TcpClient();

    try

    {

        this._server = server;

        this._port = port;

        this._callback = callback;

        this._proxy = proxy;

        this._client.BeginConnect(proxy.Server, proxy.Port, new AsyncCallback(this.Connected), null);

    }

    catch

    {

    }

}



private void Connected(IAsyncResult ar)

{

    try

    {

        this._client.EndConnect(ar);

        NetworkStream stream = this._client.GetStream();

        StreamWriter writer = new StreamWriter(stream);

        writer.WriteLine(string.Format("CONNECT {0}:{1} HTTP/1.1", this._proxy.Server, this._proxy.Port));

        writer.WriteLine("Accept: */*");

        writer.WriteLine("Content-Type: text/html");

        writer.WriteLine("Proxy-Connection: Keep-Alive");

        if (!string.IsNullOrEmpty(this._proxy.User))

        {

            string s = this._proxy.User + ":" + this._proxy.Password;

            writer.WriteLine("Proxy-Authorization: Basic " + Convert.ToBase64String(Encoding.ASCII.GetBytes(s)));

        }

        writer.WriteLine("Content-length: 0");

        writer.WriteLine();

        writer.Flush();

        bool isSuccess = false;

        string msg = "代理服务器错误";

        StreamReader reader = new StreamReader(stream);

        for (string str4 = reader.ReadLine(); (str4 != null) && (str4.Length > 0); str4 = reader.ReadLine())

        {

            if (str4.ToUpper().IndexOf("HTTP/1.0") > -1)

            {

                string[] strArray = str4.Split(new char[] { ' ' });

                if (strArray.Length > 1)

                {

                    if (strArray[1] == "200")

                    {

                        isSuccess = true;

                        msg = "代理服务器工作正常";

                    }

                    else

                    {

                        msg = "代理服务器错误 错误码" + strArray[1];

                    }

                }

            }

        }

        this._callback(isSuccess, msg);

    }

    catch (Exception)

    {

        this._callback(false, "连接代理服务器失败");

    }

}