gearcode/brush

   Client                 Server                  Console
  (-Slave)             (Http/Socket)             (-Viewer)
+----------+       +------------------+       +------------+
+ Computer +<----->+ Server   Web     +<----->+ WeixinApp  +
+----------+   /-->+ Socket   Socket  +       + WebBrowser +
               |   +------------------+       +------------+
+----------+   |
+ Computer +<--/
+----------+