ASP防XSS注入函數技巧

'*************************************
'防XSS注入函數 更新於2009-04-21 by evio
'與checkstr()相比, checkxss更加安全
'*************************************
Function Checkxss(byVal ChkStr)
    Dim Str
    Str = ChkStr
    If IsNull(Str) Then
        CheckStr = ""
        Exit Function
    End If
    Str = Replace(Str, "&", "&")
    Str = Replace(Str, "'", "´")
    Str = Replace(Str, """", """)
        Str = Replace(Str, "<", "&lt;")
        Str = Replace(Str, ">", "&gt;")
        Str = Replace(Str, "/", "&#47;")
        Str = Replace(Str, "*", "&#42;")
    Dim re
    Set re = New RegExp
    re.IgnoreCase = True
    re.Global = True
    re.Pattern = "(w)(here)"
    Str = re.Replace(Str, "$1h&#101;re")
    re.Pattern = "(s)(elect)"
    Str = re.Replace(Str, "$1el&#101;ct")
    re.Pattern = "(i)(nsert)"
    Str = re.Replace(Str, "$1ns&#101;rt")
    re.Pattern = "(c)(reate)"
    Str = re.Replace(Str, "$1r&#101;ate")
    re.Pattern = "(d)(rop)"
    Str = re.Replace(Str, "$1ro&#112;")
    re.Pattern = "(a)(lter)"
    Str = re.Replace(Str, "$1lt&#101;r")
    re.Pattern = "(d)(elete)"
    Str = re.Replace(Str, "$1el&#101;te")
    re.Pattern = "(u)(pdate)"
    Str = re.Replace(Str, "$1p&#100;ate")
    re.Pattern = "(s)(or)"
    Str = re.Replace(Str, "$1o&#114;")
        re.Pattern = "(n)"
    Str = re.Replace(Str, "$1o&#114;")
        '----------------------------------
        re.Pattern = "(java)(script)"
    Str = re.Replace(Str, "$1scri&#112;t")
        re.Pattern = "(j)(script)"
    Str = re.Replace(Str, "$1scri&#112;t")
        re.Pattern = "(vb)(script)"
    Str = re.Replace(Str, "$1scri&#112;t")
        '----------------------------------
        If Instr(Str, "exPRession") > 0 Then
                Str = Replace(Str, "expression", "e&#173;xpression", 1, -1, 0) '防止xss注入
        End If
    Set re = Nothing
    Checkxss = Str
End Function