asp中一段防SQL注入的通用脚本

'屏蔽通过地址栏攻击
url=Request.ServerVariables("QUERY_STRING")
if instr(url,";")>=1 then
url=Replace(url,";","；") : Response.Redirect("?" & url)
end if
'屏蔽通过表单攻击
for each item in request.form
stritem=lcase(server.HTMLEncode(Request.form(item)))
if instr(stritem,"select ")>=1 or instr(stritem,"insert ")>=1 or instr(stritem,"update ")>=1 or instr(stritem,"delete ")>=1 or instr(stritem,"exec ")>=1 or instr(stritem,"declare ")>=1 then
response.write ("对不起,请不要输入非法字符!")
response.end
end if
next