net.createConnection(options[, connectListener])

• options <Object> 必需的。 将传给 new net.Socket([options]) 调用和 socket.connect(options[, connectListener]) 方法。
• connectListener <Function> net.createConnection() 函数的通用参数。 如果提供，则将被添加为返回套接字上的 'connect' 事件的监听器一次。
• 返回: <net.Socket> 用于启动连接的新创建的套接字。

有关可用的选项，请参阅 new net.Socket([options]) 和 socket.connect(options[, connectListener])。

其他选项：

• timeout <number> 如果设置，则将用于在创建套接字之后但在开始连接之前调用 socket.setTimeout(timeout)。

以下是 net.createServer() 部分中描述的回显服务器的客户端示例：

const net = require('net');
const client = net.createConnection({ port: 8124 }, () => {
  // 'connect' 监听器。
  console.log('connected to server!');
  client.write('world!\r\n');
});
client.on('data', (data) => {
  console.log(data.toString());
  client.end();
});
client.on('end', () => {
  console.log('disconnected from server');
});

连接套接字 /tmp/echo.sock：

const client = net.createConnection({ path: '/tmp/echo.sock' });

• options <Object> Required. Will be passed to both the new net.Socket([options]) call and the socket.connect(options[, connectListener]) method.
• connectListener <Function> Common parameter of the net.createConnection() functions. If supplied, will be added as a listener for the 'connect' event on the returned socket once.
• Returns: <net.Socket> The newly created socket used to start the connection.

For available options, see new net.Socket([options]) and socket.connect(options[, connectListener]).

Additional options:

• timeout <number> If set, will be used to call socket.setTimeout(timeout) after the socket is created, but before it starts the connection.

Following is an example of a client of the echo server described in the net.createServer() section:

const net = require('net');
const client = net.createConnection({ port: 8124 }, () => {
  // 'connect' listener.
  console.log('connected to server!');
  client.write('world!\r\n');
});
client.on('data', (data) => {
  console.log(data.toString());
  client.end();
});
client.on('end', () => {
  console.log('disconnected from server');
});

To connect on the socket /tmp/echo.sock:

const client = net.createConnection({ path: '/tmp/echo.sock' });