diff --git a/app/controllers/ecloud_controller.rb b/app/controllers/ecloud_controller.rb
index bd0170f9..47b0ca52 100644
--- a/app/controllers/ecloud_controller.rb
+++ b/app/controllers/ecloud_controller.rb
@@ -101,6 +101,9 @@ class EcloudController < ApplicationController
   def ecloud_login_callback
     #获取code
     logger.info "oauth2 login_callback: #{params}"
+
+    raise "没有code" unless params[:code]
+
     url = "#{SERVER_URL}/oauth2/authorization?grant_type=authorization_code" +
         "&client_id=#{CLIENT_ID}&scope=&redirect_uri=&code=#{params[:code]}"