增加值不是nil和值是字符串的判断

waf.lua

@@ -113,7 +113,7 @@ elseif "POST" == ngx.var.request_method then
     args = ngx.req.get_post_args() 
 end 
 
----如果参数中有<script>...</script>怎跳转google验证
+---如果参数中有<script>...</script>怎跳转google验证,增加值不是nil和值是字符串的判断
 if args ~= nil then
 	for k, v in pairs(args) do
 		if v ~= nil and type(v) == 'string' and string.find (v, '<script>', 1) ~= nil then