错误：未设置任何响应。适用于Google Assistant的操作的云功能

Question

我正在使用 Dialogflow* ， Cloud Functions 和新的 NodeJS Client Library V2
for Google on Actions 为Google Home 构建一个 助手
应用程序。实际上，我正在将用V1构建的旧代码迁移到V2。

***

上下文

我正在尝试使用两个单独的意图来获取用户的位置：（Request Permission触发/向用户发送许可请求的User Info意图）和（检查用户是否已授予许可，然后返回助手请求继续的数据的意图。

问题

问题在于，在V1上正常工作的同一代码在V2上无效。所以我不得不做一些重构。当我部署云功能时，我能够成功请求用户的许可，获取他的位置，然后使用外部库（geocode），我可以将latlong转换为人类可读的形式。但是由于某些原因（我认为它的承诺），我无法解析承诺对象并将其显示给用户

错误

我收到以下错误：

代码

以下是我的Cloud功能代码。我使用request库，https库等尝试了此代码的多个版本。不走运…不走运

    const {dialogflow, Suggestions,SimpleResponse,Permission} = require('actions-on-google')  
    const functions = require('firebase-functions'); 
    const geocoder = require('geocoder');

    const app = dialogflow({ debug: true });

    app.middleware((conv) => {
        conv.hasScreen =
            conv.surface.capabilities.has('actions.capability.SCREEN_OUTPUT');
        conv.hasAudioPlayback =
            conv.surface.capabilities.has('actions.capability.AUDIO_OUTPUT');
    });

    function requestPermission(conv) {
        conv.ask(new Permission({
            context: 'To know who and where you are',
            permissions: ['NAME','DEVICE_PRECISE_LOCATION']
        }));
    }

    function userInfo ( conv, params, granted) {

        if (!conv.arguments.get('PERMISSION')) {

            // Note: Currently, precise locaton only returns lat/lng coordinates on phones and lat/lng coordinates 
            // and a geocoded address on voice-activated speakers. 
            // Coarse location only works on voice-activated speakers.
            conv.ask(new SimpleResponse({
                speech:'Sorry, I could not find you',
                text: 'Sorry, I could not find you'
            }))
            conv.ask(new Suggestions(['Locate Me', 'Back to Menu',' Quit']))
        }

        if (conv.arguments.get('PERMISSION')) {

            const permission = conv.arguments.get('PERMISSION'); // also retrievable with explicit arguments.get
            console.log('User: ' + conv.user)
            console.log('PERMISSION: ' + permission)
            const location = conv.device.location.coordinates
            console.log('Location ' + JSON.stringify(location))

            // Reverse Geocoding
            geocoder.reverseGeocode(location.latitude,location.longitude,(err,data) => {
                if (err) {
                    console.log(err)
                }


                // console.log('geocoded: ' + JSON.stringify(data))
                console.log('geocoded: ' + JSON.stringify(data.results[0].formatted_address))
                conv.ask(new SimpleResponse({
                    speech:'You currently at ' + data.results[0].formatted_address + '. What would you like to do now?',
                    text: 'You currently at ' + data.results[0].formatted_address + '.'
                }))
                conv.ask(new Suggestions(['Back to Menu', 'Learn More', 'Quit']))

            })

        }

    }


    app.intent('Request Permission', requestPermission);
    app.intent('User Info', userInfo);

    exports.myCloudFunction = functions.https.onRequest(app);

很感谢任何形式的帮助。谢谢

Answer 1

您最后的猜测是正确的-问题是您没有使用Promises。

app.intent()``userInfo如果使用异步调用，则期望处理程序函数（在您的情况下）返回Promise。（如果不是，则可以不返回任何内容。）

正常的操作过程是使用返回Promise的东西。但是，这对于您而言是棘手的，因为尚未将地理代码库更新为使用Promises，并且userInfo函数中的其他代码未返回任何内容。

在这种情况下，重写可能看起来像这样（但是，我还没有测试代码）。在其中，我将两个条件userInfo分解为另外两个函数，以便一个可以返回Promise。

function userInfoNotFound( conv, params, granted ){
  // Note: Currently, precise locaton only returns lat/lng coordinates on phones and lat/lng coordinates 
  // and a geocoded address on voice-activated speakers. 
  // Coarse location only works on voice-activated speakers.
  conv.ask(new SimpleResponse({
    speech:'Sorry, I could not find you',
    text: 'Sorry, I could not find you'
  }))
  conv.ask(new Suggestions(['Locate Me', 'Back to Menu',' Quit']))
}

function userInfoFound( conv, params, granted ){
  const permission = conv.arguments.get('PERMISSION'); // also retrievable with explicit arguments.get
  console.log('User: ' + conv.user)
  console.log('PERMISSION: ' + permission)
  const location = conv.device.location.coordinates
  console.log('Location ' + JSON.stringify(location))

  return new Promise( function( resolve, reject ){
    // Reverse Geocoding
    geocoder.reverseGeocode(location.latitude,location.longitude,(err,data) => {
      if (err) {
        console.log(err)
        reject( err );
      } else {
        // console.log('geocoded: ' + JSON.stringify(data))
        console.log('geocoded: ' + JSON.stringify(data.results[0].formatted_address))
        conv.ask(new SimpleResponse({
          speech:'You currently at ' + data.results[0].formatted_address + '. What would you like to do now?',
          text: 'You currently at ' + data.results[0].formatted_address + '.'
        }))
        conv.ask(new Suggestions(['Back to Menu', 'Learn More', 'Quit']))
        resolve()
      }
    })
  });

}

function userInfo ( conv, params, granted) {
  if (conv.arguments.get('PERMISSION')) {
    return userInfoFound( conv, params, granted );
  } else {
    return userInfoNotFound( conv, params, granted );
  }
}