net.createConnection(port[, host][, connectListener])

• port <number> 套接字应该连接的端口号。会传给socket.connect(port[, host][, connectListener])。
• host <string> 套接字应该连接的主机名。会传给socket.connect(port[, host][, connectListener])。默认值: 'localhost'。
• connectListener <Function> net.createConnection() 的常见参数，在初始化套接字时对'connect' 事件的单次监听器，会传给 socket.connect(port[, host][, connectListener])。
• 返回: <net.Socket> 用于开启连接的新创建的套接字。

初始化一个 TCP 连接。

这个函数用默认配置创建一个新的 net.Socket，然后 socket.connect(port[, host][, connectListener]) 初始化一个连接，并返回开启连接的那个 net.Socket。

• port <number> Port the socket should connect to. Will be passed to socket.connect(port[, host][, connectListener]).
• host <string> Host the socket should connect to. Will be passed to socket.connect(port[, host][, connectListener]). Default: 'localhost'.
• connectListener <Function> Common parameter of the net.createConnection() functions, an "once" listener for the 'connect' event on the initiating socket. Will be passed to socket.connect(port[, host][, connectListener]).
• Returns: <net.Socket> The newly created socket used to start the connection.

Initiates a TCP connection.

This function creates a new net.Socket with all options set to default, immediately initiates connection with socket.connect(port[, host][, connectListener]), then returns the net.Socket that starts the connection.