Twilio WhatsApp：发送多个媒体消息

Question

str.text = ["Image 1", "Image 2", "Image 3"]
str.images = ["https://hatrabbits.com/wp-content/uploads/2017/01/random.jpg", "https://images.unsplash.com/photo-1494253109108-2e30c049369b?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&w=1000&q=80", "https://www.computerhope.com/jargon/r/random-dice.jpg", ]

代码：

function sendMsg(img, txt) {
  context.getTwilioClient().messages.create({
    to: event.From,
    from: 'whatsapp:' + context.WHATSAPP_NUMBER,
    body: txt,
    mediaUrl: img
  }).then(message => {
    callback();
  }).catch(err => callback(err));
}

async function test(str) {
  (str.text).reduce(async (previousPromise, value, i) => {
      await previousPromise;
      return sendMsg(str.images[i], str.text[i])
  }, Promise.resolve());
}

request.post({
...
}, function (err, res, body) {

  var str = body.data.message;
  test(str);
}

Answer 1

看起来你是混合回调，promise没有适当的返回东西。我会随着时间的推移而改变

• 从发送味精返回promise
• 在请求中添加await.post
• 使用for..of循环按顺序处理它们

像这样的东西

str.text = ["Image 1", "Image 2", "Image 3"]
str.images = ["https://hatrabbits.com/wp-content/uploads/2017/01/random.jpg", "https://images.unsplash.com/photo-1494253109108-2e30c049369b?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&w=1000&q=80", "https://www.computerhope.com/jargon/r/random-dice.jpg"];

function sendMsg(img, txt) {
  return context.getTwilioClient().messages.create({
    to: event.From,
    from: 'whatsapp:' + context.WHATSAPP_NUMBER,
    body: txt,
    mediaUrl: img
  }).catch(err => console.log(err));
}

async function test(str) {
  for (const [index, value] of str.text) {
    await sendMsg(str.images[index], str.text[index]);
  }
}

request.post({
  ...
  }, async function (err, res, body) {

    var str = body.data.message;
    await test(str);
  }