最有效的方式是使用 HTTP 协议的 1.1 版本保持连接打开，并在走出步着时让服务器把更新发送给客户端。

The most efficient way is to use the 1.1 version of the HTTP protocol to hold the connection open and to have the server send out updates to the client when moves are made.

youdao

修改了网络协议，这样客户端跑615版的时候不会再看到服务器运行上的老版本。

Change in network protocol, therefore clients running 0.615 won't be able to see servers running older versions.

youdao