终极防范SQL注入漏洞
其实SQL注入漏洞并不可怕,知道原理 + 耐心仔细,就可以彻底防范!
下面给出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:
function killn(byval s1) '过滤数值型参数if not isnumeric(s1) then killn=0elseif s1<0 or s1>2147483647 then killn=0elsekilln=clng(s1)end ifend ifend function
function killc(byval s1) 过滤货币型参数if not isnumeric(s1) then killc=0elsekillc=formatnumber(s1,2,-1,0,0)end ifend function
function killw(byval s1) '过滤字符型参数if len(s1)=0 thenkillw=""elsekillw=trim(replace(s1,"'",""))end ifend function
function killbad(byval s1) 过滤所有危险字符,包括跨站脚本If len(s1) = 0 thenkillbad=""elsekillbad = trim(replace(replace(replace(replace(replace(replace(replace(replace(s1,Chr(10), "<br>"), Chr(34), """), ">", ">"), "<", "<"), "&", "&"),chr(39),"'"),chr(32)," "),chr(13),""))end ifend function
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