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asp.net網(wǎng)站防惡意刷新的Cookies與Session解決方法

更新時(shí)間：2014年09月19日 10:43:54 投稿：shichen2014

這篇文章主要介紹了asp.net網(wǎng)站防惡意刷新的Cookies與Session解決方法,分別以實(shí)例的形式講述了采用cookie法與session法實(shí)現(xiàn)WEB頁(yè)面防止惡意刷新的技巧,需要的朋友可以參考下

本文實(shí)例講述了asp.net網(wǎng)站防惡意刷新的Cookies與Session解決方法，是WEB程序設(shè)計(jì)中非常實(shí)用的技巧。分享給大家供大家參考。具體實(shí)現(xiàn)方法如下：

Session版實(shí)現(xiàn)方法：

public double time;
public const int freetime = 1;//防刷冰凍時(shí)間間隔,當(dāng)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(wèn)安全,請(qǐng)您 " + freetime + " 秒后<a href='" + Request.RawUrl + "' target='_self' style='color:#FF0000;'>點(diǎn)擊這里刷新</a>此頁(yè)面</td>");
    Response.Write(" </tr>");
    Response.Write("</table>");
    Response.End();
}

Cookies版實(shí)現(xiàn)方法：

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(chǔ)的url值 
}

string strThisPage = HttpContext.Current.Request.Url.PathAndQuery.ToString();//獲取當(dāng)前頁(yè)地址 
DateTime LastTime = DateTime.Now;
if (page.Equals(strThisPage))//如果cookie中的值和當(dāng)前頁(yè)相等，那么表示是刷新操作 
{
  TimeSpan ts = LastTime - DateTime.Parse(HttpContext.Current.Request.Cookies["time"].Value.ToString());

  time = ts.Seconds;
  if (time < freetime)
  {
 warm_prompt();
  }
}
else
{
  //執(zhí)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(wèn)安全,頁(yè)面將在2秒后將自動(dòng)跳轉(zhuǎn)到您要訪問(wèn)的內(nèi)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();
}

相信本文所述對(duì)大家的asp.net程序設(shè)計(jì)有一定的借鑒價(jià)值。

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