本文给出4个函数,足够你抵挡一切SQL注入漏洞!读懂代码,你就能融会贯通。
注意要对所有的request对象进行过滤:包括 request.cookie, request.ServerVariables 等等容易被忽视的对象:
代码如下:
function killn(byval s1) '过滤数值型参数 if not isnumeric(s1) then killn=0 else if s1<0 or s1>2147483647 then killn=0 else killn=clng(s1) end if end if end function
function killc(byval s1) 过滤货币型参数 if not isnumeric(s1) then killc=0 else killc=formatnumber(s1,2,-1,0,0) end if end function
function killw(byval s1) '过滤字符型参数 if len(s1)=0 then killw="" else killw=trim(replace(s1,"'","")) end if end function
function killbad(byval s1) 过滤所有危险字符,包括跨站脚本 If len(s1) = 0 then killbad="" else killbad = trim(replace(replace(replace(replace(replace(replace(replace(replace(s1,Chr(10), "<br>"), Chr(34), """), ">", ">"), "<", "<"), "&", "&"),chr(39),"'"),chr(32)," "),chr(13),"")) end if end function
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