string UserAgent = "Mozilla/5.0 (Windows NT 5.2; rv:29.0) Gecko/20100101 Firefox/29.0";

    string ContentType = "";

    Uri strReqUrl = new Uri("http://m.lhrb.ufstone.net/");

    protected void Application_BeginRequest(object sender, EventArgs e)

    {

        Uri u = new Uri(strReqUrl, Request.RawUrl);

        byte[] b = getVerificationCode(u);

        //MemoryStream ms = new MemoryStream(b);

        //Response.ClearContent();

        //Response.ContentType = ContentType;

        //Response.BinaryWrite(b);

        StringBuilder strHtml = new StringBuilder(Encoding.GetEncoding("gb2312").GetString(b));

        StringBuilder sb = new StringBuilder();

        GetHtmlUrl(ref strHtml);

        Response.Write(strHtml.ToString());

        Response.End();

    }

    public byte[] getVerificationCode(Uri url)

    {

        WebClient MyWebClient = new WebClient();

        MyWebClient.Headers.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");

        MyWebClient.Headers.Add("Accept-Language", "    zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");

        MyWebClient.Headers.Add("User-Agent", this.UserAgent);

        MyWebClient.Credentials = CredentialCache.DefaultCredentials;

        try

        {

            Byte[] pageData = MyWebClient.DownloadData(url.AbsoluteUri);

            ContentType = MyWebClient.ResponseHeaders["Content-Type"];

            return (pageData);

        }

        catch

        {

            return null;

        }

    }