支持配置error code

@@ -125,21 +125,22 @@ local query_limit_ip_access_conf=function()
        if property then
          local source=property["source"]
          if source then
-            local limit_ip_access={}      
-            
+            local limit_ip_access={ degrades = {} }      
+
             limit_ip_access["is_open"]=source["is_open"] 
  
             local white_ips={}    
-            local degrade_methods = {}       
             for k,v in pairs(source) do
                if string.find(k,"^white_ips%[*") then
                   table.insert(white_ips,v)    
                elseif string.find(k,"^degrade_methods%[*") then
-                   table.insert(degrade_methods,v) 
+                  d_method = split_str_list("v", ",", 2)
+                  local e_code = d_method[2]
+                  if e_code == nil then  e_code = 9999991 end
+                  limit_ip_access.degrades[d_method[1]] = e_code
                end
             end
             limit_ip_access["white_ips"]=white_ips
-            limit_ip_access["degrade_methods"]=degrade_methods
             lua_context.lua_conf_cache:set("limit_ip_access",cjson.encode(limit_ip_access))
          end
        end

@@ -43,23 +43,19 @@ end
 function do_degrade()
   local method = http_request.get_method()    
   
-  if  limit_ip_config and limit_ip_config.degrade_methods then
-    if contains(limit_ip_config.degrade_methods,method) then
-                ngx.log(ngx.ERR, "[Degraded]: ", method)
+  if  limit_ip_config and  limit_ip_config.degrades and limit_ip_config.degrades[method] then   
+                ngx.log(ngx.ERR, "[Degraded]: ", method)       
+                local err_code = limit_ip_config.degrades[method]     
+                local err_msg = default_err_msg 
                 ngx.header["Content-Type"]="application/json;charset=utf-8"
-                local rsp_body = '{"code":9999991,"message":"limited"}'
+                local msg='{"code":' .. err_code .. ',"message":"'.. err_msg .. '"}'
                 ngx.say(rsp_body)
                 ngx.exit(ngx.HTTP_OK)
-    end
   end
 end
 
-function contains(t, e)
-  for i = 1,#t do
-    if t[i] == e then return true end
-  end
-  return false
-end
+
+ 
 
 -------- function: doing rate limit by key[interface]-----
 function rate_limit()