asp get和post数据接收过滤

<%
'--------定义部份------------------
Dim XH_Post,XH_Get,XH_In,XH_Inf,XH_Xh,XH_db,XH_dbstr
'自定义需要过滤的字串,用 "|" 分隔
XH_In = "'|;|and|exec|insert|select|delete%20from|update|count|*|%|chr|mid|master|truncate|char|declare|drop%20table|from|net%20user|xp_cmdshell|/add|net%20localgroup%20administrators|Asc|char"
'----------------------------------
%>
<%
XH_Inf = split(XH_In,"|")
'--------POST部份------------------
If Request.Form<>"" Then
For Each XH_Post In Request.Form
For XH_Xh=0 To Ubound(XH_Inf)
If Instr(LCase(Request.Form(XH_Post)),XH_Inf(XH_Xh))<>0 Then
Response.Write "<Script Language=JavaScript>alert('请不要在参数中包含非法字符尝试注入！');</Script>"
Response.Write "非法操作！系统做了如下记录↓<br>"
Response.Write "操作ＩＰ："&Request.ServerVariables("REMOTE_ADDR")"<br>"
Response.Write "操作时间："&Now"<br>"
Response.Write "操作页面："&Request.ServerVariables("URL")"<br>"
Response.Write "提交方式：ＰＯＳＴ<br>"
Response.Write "提交参数："&XH_Post"<br>"
Response.Write "提交数据："&Request.Form(XH_Post)
Response.End
End If
Next
Next
End If
'----------------------------------
'--------GET部份-------------------
If Request.QueryString<>"" Then
For Each XH_Get In Request.QueryString
For XH_Xh=0 To Ubound(XH_Inf)
If Instr(LCase(Request.QueryString(XH_Get)),XH_Inf(XH_Xh))<>0 Then
Response.Write "<Script Language=JavaScript>alert('请不要在参数中包含非法字符尝试注入！');</Script>"
Response.Write "非法操作！系统做了如下记录↓<br>"
Response.Write "操作ＩＰ："&Request.ServerVariables("REMOTE_ADDR")"<br>"
Response.Write "操作时间："&Now"<br>"
Response.Write "操作页面："&Request.ServerVariables("URL")"<br>"
Response.Write "提交方式：ＧＥＴ<br>"
Response.Write "提交参数："&XH_Get"<br>"
Response.Write "提交数据："&Request.QueryString(XH_Get)
Response.End
End If
Next
Next
End If
'----------------------------------
%>