镜像管理问题

app/services/admins/check_shixun_mirrors_service.rb

@@ -77,10 +77,11 @@ class Admins::CheckShixunMirrorsService < ApplicationService
     @_bridge_images ||= begin
       url = EduSetting.get('cloud_bridge')
       res = Faraday.get(url)
+      res_body = JSON.parse(res.body)
 
-      raise Error, '拉取镜像信息异常' if res && res['code'].to_i != 0
+      raise Error, '拉取镜像信息异常' if res_body && res_body['code'].to_i != 0
 
-      res
+      res_body
     rescue => e
       Rails.logger.error("get response failed ! #{e.message}")
       raise Error, '实训云平台繁忙（繁忙等级：84）'