asp.net網站防惡意刷新的Cookies與Session解決方法

 本文實例講述了asp.net網站防惡意刷新的Cookies與Session解決方法，是WEB程序設計中非常實用的技巧。分享給大家供大家參考。具體實現方法如下：

Session版實現方法：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 public double time; public const int freetime = 1;//防刷冰凍時間間隔,當前為1秒    #region 防惡意刷新 if (Session.SessionID == null) {   Response.End(); } else if (Session["sionid"] == null) {   Session["sionid"] = Session.SessionID; } if (Session["last"] == null) {   Session["last"] = DateTime.Now; } else {   DateTime thisTime = DateTime.Now;   DateTime lastTime = DateTime.Parse(Session["last"].ToString());      if (Session.SessionID == Session["sionid"].ToString())  Session["last"] = thisTime;   TimeSpan ts = thisTime - lastTime;      time = ts.TotalMilliseconds;   if (time < freetime * 500)   {  warm_prompt();   } } #endregion    public void warm_prompt() {     Response.Write("<table width='778' border='0' align='center' cellpadding='3' cellspacing='2' bgcolor='#009900' style='font-size: 14px; '>");     Response.Write(" <tr bgcolor='#FFFFFF'>");     Response.Write("  <td><img src='/newimages/logos.gif'></td>");     Response.Write("  <td bgcolor='#EEFFEE'為了保證您的訪問安全,請您 " + freetime + " 秒後<a href='" + Request.RawUrl + "' target='_self' style='color:#FF0000;'>點擊這裡刷新</a>此頁面</td>");     Response.Write(" </tr>");     Response.Write("</table>");     Response.End(); }

Cookies版實現方法：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 public double time; public const int freetime = 2;    #region 防惡意刷新 string page; if (Request.Cookies["page"] == null) {   page = ""; } else {   page = HttpContext.Current.Request.Cookies["page"].Value.ToString(); //獲取cookie中存儲的url值  }    string strThisPage = HttpContext.Current.Request.Url.PathAndQuery.ToString();//獲取當前頁地址  DateTime LastTime = DateTime.Now; if (page.Equals(strThisPage))//如果cookie中的值和當前頁相等，那麼表示是刷新操作  {   TimeSpan ts = LastTime - DateTime.Parse(HttpContext.Current.Request.Cookies["time"].Value.ToString());      time = ts.Seconds;   if (time < freetime)   {  warm_prompt();   } } else {   //執行操作    Response.Cookies["page"].Value = strThisPage;   Response.Cookies["time"].Value = LastTime.ToString(); } #endregion    public void warm_prompt() {     Response.Write("<table width='778' border='0' align='center' cellpadding='3' cellspacing='2' bgcolor='#009900' style='font-size: 14px; '>");     Response.Write(" <tr bgcolor='#FFFFFF'>");     Response.Write("  <td><img src='/newimages/logos.gif'></td>");     Response.Write("  <td bgcolor='#EEFFEE'為了保證您的訪問安全,頁面將在2秒後將自動跳轉到您要訪問的內容！</td>");     Response.Write(" </tr>");     Response.Write("</table>");     Response.Write("<meta http-equiv="refresh" content="2";URL=" + HttpContext.Current.Request.Cookies["page"].Value.ToString() + ">");     Response.End(); }