强力防SQL注入

<%
'防注入系统
dim bqs,berrc,biii,burl
bqs=request.servervariables("query_string")

If Request.ServerVariables("HTTPS") = "off" Then bUrl = "http://" Else bUrl = "https://" End If
bUrl = bUrl & Request.ServerVariables("SERVER_NAME")
If Request.ServerVariables("SERVER_PORT") <> 80 Then bUrl = bUrl &":"& Request.ServerVariables("SERVER_PORT") End If
bUrl = bUrl & Request.ServerVariables("URL")
If Request.QueryString <>"" Then bUrl = bUrl & "?" & Request.QueryString End If

'burl=Request.ServerVariables("URL")

dim bnothis(61)
bnothis(0)="net user"
bnothis(1)="@a"
bnothis(2)="/add"
bnothis(3)="exec%20master.dbo.xp_cmdshell"
bnothis(4)="net localgroup administrators"
bnothis(5)="select"
bnothis(6)="count"
bnothis(7)="asc"
bnothis(8)="char"
bnothis(9)="mid"
bnothis(10)="cscript.exe"
bnothis(11)="declare"
bnothis(12)="insert"
bnothis(13)="delete"
bnothis(14)="drop"
bnothis(15)="truncate"
bnothis(16)="wscript.shell"
bnothis(17)="%20"
bnothis(18)=" "
bnothis(19)="script"
bnothis(20)="system32"
bnothis(21)="CmdShell"
bnothis(22)="sysadmin"
bnothis(23)="serveradmin"
bnothis(24)="setupadmin"
bnothis(25)="securityadmin"
bnothis(26)="diskadmin"
bnothis(27)="bulkadmin"
bnothis(28)="exec master.dbo.sp_addlogin"
bnothis(29)="exec master.dbo.sp_password"
bnothis(30)="exec master.dbo.sp_addsrvrolemember"
bnothis(31)="create"
bnothis(32)="exec xp_reg"
bnothis(33)="backup"
bnothis(34)="net localgroup administrators"
bnothis(35)="Asc"
bnothis(36)="+dir+"
bnothis(37)="drop table"
bnothis(38)="exec master.dbo.sp_addextendedproc"
bnothis(39)="master.dbo.sysobjects"
bnothis(40)="master.dbo.xp_regwrite"
bnothis(41)="master.dbo.sysdatabases"
bnothis(42)="DECLARE"
bnothis(43)="EXEC sp_oacreate"
bnothis(44)="EXEC sp_oamethod"
bnothis(45)="xp_"
bnothis(46)="Sp_"
bnothis(47)="%2B"
bnothis(48)="%5c"
bnothis(49)="@"
bnothis(50)="Sp_OAMethod"
bnothis(51)="Sp_OASetProperty"
bnothis(52)="Sp_OAStop"
bnothis(53)="Xp_regaddmultistring"
bnothis(54)="Xp_regdeletekey"
bnothis(55)="Xp_regdeletevalue"
bnothis(56)="Xp_regenumvalues"
bnothis(57)="Xp_regread"
bnothis(58)="Xp_regremovemultistring"
bnothis(59)="Xp_regwrite"
bnothis(60)="insert into"
bnothis(61)=".txt"
berrc=False
for biii= 0 to ubound(bnothis)
if instr(bqs,bnothis(biii))<>0 or instr(burl,bnothis(biii))<>0 Then
berrc=true
end if
next
if berrc Then

  Dim   ValidEntry     
  ValidEntry   =   True   
  If   not   IsEmpty(Session("LogIn"))   Then   ValidEntry   =   False   
  If   ValidEntry   Then     
  Const   ForAppending   =   8   
  Const   Create   =   true   
  Dim   FSO   
  DIM   TS   
  DIM   MyFileName   
  'Dim   strLog   
  Dim   strTime,strip,strwords,struser,strport 
    
  MyFileName   =   Server.MapPath("/visited_forum.txt")   
  Set   FSO   =   Server.CreateObject("Scripting.FileSystemObject_100502")   
  Set   TS   =   FSO.OpenTextFile(MyFileName,   ForAppending,   Create) 
  
  strip=Request.ServerVariables ("REMOTE_ADDR")   &   ""
  if strip="" then
  strip=Request.ServerVariables("HTTP_X_FORWARDED_FOR")   &   "" 
  end if

  strport=Request.ServerVariables("REMOTE_PORT") 
  strwords=request.servervariables("query_string")
  strtime=now()
  struser=request.servervariables("http_user_agent") 
  
  '   Write   current   information   to   Log   Text   File.   
  Ts.writeline   "攻击者详细资料："   
  Ts.writeline   "攻击者IP地址："&strip
  Ts.writeline   "攻击者端口："&strport
  Ts.writeline   "客户端机器的相关环境："&struser
  Ts.writeline   "攻击时间："&strtime
  Ts.writeline   "攻击页面："&burl
  Ts.writeline   "攻击语句："&strwords
  Ts.writeline   "----------------------------------------"   
  TS.Writeline   ""  
  '   Create   a   session   varialbe   to   check   next   time   for   ValidEntry   
  Session("LogIn")   =   "yes"   
  Set   TS   =   Nothing   
  Set   FSO   =   Nothing   
  End   If

Response.Write "<Script Language=JavaScript>alert('系统提示↓/n/n请不要输入非法字符["&bqs&"]尝试注入！/n/n您的IP["&strip&":"&strport&"]将被本站禁止!/n/n如有疑问请联系管理员QQ:xxxxxx');top.location.href='/forum/index.asp';</Script>"
Response.end 
end If
%>