add log for limit

@@ -27,6 +27,7 @@ function limit(limit_key,max_limit,seconds)
 
   if limit then
     if tonumber(limit)>max_limit then
+      ngx.log(ngx.ERR,"[REQUEST LIMITED] " , string.format("Method: %s, currentQPS:%d, maxQPS: %d", req_uri_method, limit, max_limit))
       return false
     else
       return true
@@ -74,7 +75,6 @@ function rate_limit()
   -- do limit
   local flag= limit("yh:nginx:limitflow:" .. req_uri_method, max_per_sencond)
   if not flag then
-    ngx.log(ngx.ERR,"The request is limited :" .. req_uri_method)
     ngx.header["Content-Type"]="application/json;charset=utf-8"
     local msg='{"code":' .. err_code .. ',"message":"'.. err_msg .. '"}'
     ngx.say(msg)