增加对script的验证

waf.lua

@@ -65,9 +65,11 @@ 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 string.find (v, '<script>', 1) ~= nil then
-		redirect.checkgoogle(red)
+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