AJAX跨域方案

protected void Page_Load(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(Request["action"]) == false)
        {
            System.Net.WebClient web = new System.Net.WebClient();
            System.IO.StreamReader reader = new System.IO.StreamReader(web.OpenRead(http://www.baidu.com + Request.Url.Query));
            Response.Write(reader.ReadToEnd());
            Response.End();
        }
    }