增加对script的验证

waf.lua

@@ -65,10 +65,12 @@ elseif "POST" == request_method then
     args = ngx.req.get_post_args() 
 end 
 ---如果参数中有<script>...</script>怎跳转google验证
-for k, v in ipairs(args) do
+if args ~= nil then
+	for k, v in ipairs(args) do
 		if string.find (v, '<script>', 1) ~= nil then
 			redirect.checkgoogle(red)
 		end
+	end
 end