socket.remoteAddress
远程 IP 地址的字符串表示形式。
例如,'74.125.127.100' 或 '2001:4860:a005::68'。
如果套接字被破坏(例如,如果客户端断开连接),则值可能是 undefined。
The string representation of the remote IP address. For example,
'74.125.127.100' or '2001:4860:a005::68'. Value may be undefined if
the socket is destroyed (for example, if the client disconnected).