add

 set $real_ip "";
 set_by_lua_file $real_ip conf/setup.lua;
 
-access_by_lua_block {
+access_by_lua '
    local local_limit =  require "limit_local_access"
    local status, is_local = pcall(local_limit:check_local_access)
    if not status then
       ngx.log(ngx.ERR, "call method [check_local_access] failed.", errMsg)
    else
-     if not is_local_ip then
+     if not is_local then
         ngx.exit(403)
       end
     end
-}
+';
 
\ No newline at end of file

-local moduleName = ...
-local M = {}
-_G[moduleName] = M
-
+local modname= ...
+local M={}
+_G[modname]=M
+package.loaded[modname]=M
 
 -- author: chunhua.zhang
 -- only allow request from local ip and nat ip
@@ -25,7 +25,8 @@ local local_cidr = {
 
  -- check if ip is local
  -- depends on $real_ip which setup by  setup.lua
-function M.check_local_access()
+function M:check_local_access()
+    
     local ip=string.gsub(ngx.var.remote_addr,"%s","")     
 
     local is_local_ip = false
@@ -38,4 +39,6 @@ function M.check_local_access()
     end
     
     return is_local_ip
-end
\ No newline at end of file
+end
+
+