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

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

启动服务器，监听已绑定到端口、Unix 域套接字或 Windows 命名管道的给定 handle 上的连接。

handle 对象可以是服务器、套接字（任何具有底层 _handle 成员的对象），也可以是具有有效文件描述符的 fd 成员的对象。

Windows 上不支持监听文件描述符。

• handle <Object>
• backlog <number> Common parameter of server.listen() functions
• callback <Function>
• Returns: <net.Server>

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.

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

Listening on a file descriptor is not supported on Windows.