Question

以一种成功连接的tls.connect实例应该解决的方式宣传socket方法的正确方法是什么。我发现它有点棘手，因为似乎没有办法开箱即用，以区分连接时的错误和与TCP服务器通信期间的常规错误（成功连接后）。虽然看起来有些臭，但可能就像

const connect = (port, host, options) => {
  /**
   * Some workaround to be able
   * to distinguish between error on connection
   * and error after connection was established successfully
   */
  let connected = false

  return new Promise((resolve, reject) => {
    const socket = tls.connect(port, host, options, () => {
      connected = true
      return resolve(socket)
    })

    socket.on('data', (data) => {...})
    socket.on('end', () => {...})
    socket.on('disconnect', () => {...})
    socket.on('error', (err) => {
       if (!connected) {
         return reject(err)
       }
       console.error(err)
    })
  })
}

Answer 1

立即返回套接字并向套接字添加connected承诺 - 这样您可以同步附加其他处理程序并仍然听取与承诺的连接：

const connect = (port, host, options) => {
  let resolve, reject;
  var connected = new Promise((res, rej) => { resolve = res; reject = rej; });
  const socket = tls.connect(port, host, options, resolve);
  socket.connected = connected;
  socket.on('error', reject); // it's fine to calll reject/resolve several times
  return socket;
};

Promisify节点tls.connect方法

1 个答案: