如何在几个axios请求失败时成功地处理它们

Question

假设我有一个快速服务器，它需要连接(发送数据)多个快速服务器。如下所示：

app.post('/events', async (req, res) => {
  const event = req.body;
  events.push(event)

  try {
    console.log(`event received ${event.type}`)
    await axios.post('http://localhost:4000/events', event);
    console.log('event sent to 4000')
    await axios.post('http://localhost:4001/events', event);
    console.log('event sent to 4001')
    await axios.post('http://localhost:4002/events', event); //<-- server stopped hence go catch block
    console.log('event sent to 4002')
    await axios.post('http://localhost:4003/events', event); //<-- never come here
    console.log('event sent to 4003')
  } catch (e) {
    console.log(e);
  }

  res.send({ status: 'OK' });
});

其中一个特快专递服务器被停止的原因。让运行在端口4002上的服务器停止，但是我不能将数据发送到4003上运行端口的服务器。是否有任何方法处理由catch块捕获的ECONNREFUSED错误，以及将数据发送到4003上运行端口的服务器？

Answer 1

如@jfriend00所示，您可以使用Promise.allSettled()，

const promise1 = axios.post('http://localhost:4000/events', event)
  const promise2 = axios.post('http://localhost:4001/events', event)
  const promise3 = axios.post('http://localhost:4002/events', event)
  const promise4 = axios.post('http://localhost:4003/events', event)
  const promises = [promise1, promise2, promise3, promise4];

  Promise.allSettled(promises).
    then((results) => results.forEach((result) => console.log(result.status)));

而不是try/catch。