server.listen(handle[, backlog][, callback])

• handle <Object>
• backlog <number> server.listen() 函数的常用参数
• callback <Function>
• 返回：<net.Server>

启动一个服务器，在指定的 handle 上监听连接，该 handle 已经绑定到一个端口、Unix 域套接字或 Windows 命名管道。

🌐 Start a server listening for connections on a given handle that has already been bound to a port, a Unix domain socket, or a Windows named pipe.

handle 对象可以是服务器、套接字（任何带有底层 _handle 成员的东西）、BoundSocket，或者是带有 fd 成员且该成员是有效文件描述符的对象。

🌐 The handle object can be either a server, a socket (anything with an underlying _handle member), a BoundSocket, or an object with an fd member that is a valid file descriptor.

当 handle 是一个 BoundSocket 时，服务器会采用已绑定的套接字并开始监听它。采用会消耗该已绑定的套接字（参见 所有权转移）。

🌐 When handle is a BoundSocket, the server adopts the already-bound socket and starts listening on it. Adoption consumes the bound socket (see ownership transfer).

Windows 不支持监听文件描述符。

🌐 Listening on a file descriptor is not supported on Windows.