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<script language="C#" runat="server"><!--
protected void Application_BeginRequest(Object sender, EventArgs e)
{
StartProcessRequest();
}
/// <summary>
/// 处理用户提交的请求
/// </summary>
private void StartProcessRequest()
{
try
{
string getkeys = "";
if (System.Web.HttpContext.Current.Request.QueryString != null)
{
for (int i = 0; i < System.Web.HttpContext.Current.Request.QueryString.Count; i++)
{
getkeys = System.Web.HttpContext.Current.Request.QueryString.Keys[i];
if (!ProcessSqlStr(System.Web.HttpContext.Current.Request.QueryString[getkeys]))
{
System.Web.HttpContext.Current.Response.Write("Get,出现错误,包含非法字符串");
System.Web.HttpContext.Current.Response.End();
}
}
}
if (System.Web.HttpContext.Current.Request.Form != null)
{
for (int i = 0; i < System.Web.HttpContext.Current.Request.Form.Count; i++)
{
getkeys = System.Web.HttpContext.Current.Request.Form.Keys[i];
if (getkeys == "__VIEWSTATE") continue;
if (!ProcessSqlStr(System.Web.HttpContext.Current.Request.Form[getkeys]))
{
System.Web.HttpContext.Current.Response.Write("Post,出现错误,包含非法字符串");
System.Web.HttpContext.Current.Response.End();
}
}
}
if(System.Web.HttpContext.Current.Request.Cookies!=null)
{
for (int i = 0; i < System.Web.HttpContext.Current.Request.Cookies.Count; i++)
{
getkeys = System.Web.HttpContext.Current.Request.Cookies.Keys[i];
if (getkeys == "__VIEWSTATE") continue;
if (!ProcessSqlStr(System.Web.HttpContext.Current.Request.Cookies[getkeys].Value))
{
System.Web.HttpContext.Current.Response.Write("Cookies,出现错误,包含非法字符串");
System.Web.HttpContext.Current.Response.End();
}
}
}
}
catch
{
// 错误处理: 处理用户提交信息!
}
}
/// <summary>
/// 分析用户请求是否正常
/// </summary>
/// <param>传入用户提交数据 </param>
/// <returns>返回是否含有SQL注入式攻击代码 </returns>
private bool ProcessSqlStr(string Str)
{
bool ReturnValue = true;
try
{
if (Str.Trim() != "")
{
string SqlStr = "select¦insert¦delete¦update¦declare¦sysobjects¦syscolumns¦cast¦truncate¦master¦mid¦exec";
string[] anySqlStr = SqlStr.Split('¦');
foreach (string ss in anySqlStr)
{
if (Str.ToLower().IndexOf(ss) >= 0)
{
ReturnValue = false;
break;
}
}
}
}
catch
{
ReturnValue = false;
}
return ReturnValue;
}
// --></script>
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