TypeError：無法讀取未定義的Dialogflow Promise的屬性'then'

Question

我正在使用Dialogflow內聯編輯器，並且試圖從外部API獲取結果，但是在Firebase日志中卻遇到以下錯誤：

TypeError：無法讀取WebhookClient.handleRequest（/user_code/node_modules/dialogflow-fulfillment/src/dialogflow-fulfillment.js:303:44）上視頻（/user_code/index.js:48:9）的未定義屬性'then'在/ var /處的cloudFunction（/user_code/node_modules/firebase-functions/lib/providers/https.js:57:9）處的export.dialogflowFirebaseFulfillment.functions.https.onRequest（/user_code/index.js:78:9）處在process._tickDomainCallback（內部/ process / next_tick.js：128：9）

這是我的代碼：

'use strict';

const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');
const request = require('request-promise-native');

process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements

exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
  const agent = new WebhookClient({ request, response });
  console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));
  console.log('Dialogflow Request body: ' + JSON.stringify(request.body));

  function welcome(agent) {
    agent.add(`Welcome to my agent!`);
  }

  function fallback(agent) {
    agent.add(`I didn't understand`);
    agent.add(`I'm sorry, can you try again?`);
}

  function video(agent) {
    agent.add(`Sure, You can access to external API`);
    const url = "https://reqres.in/api/users?page=2";
    return request.get(url)
        .then(jsonBody => {
            var body = JSON.parse(jsonBody);
            agent.add(body.data[0].first_name)
            return Promise.resolve(agent);
        })
        .catch(err => {
            console.error('Problem making network call', err);
            agent.add('Unable to get result');
            return Promise.resolve(agent);
        });
    }

  // Run the proper function handler based on the matched Dialogflow intent name
  let intentMap = new Map();
  intentMap.set('Default Welcome Intent', welcome);
  intentMap.set('Default Fallback Intent', fallback);
  intentMap.set('video', video);
  // intentMap.set('your intent name here', googleAssistantHandler);
  agent.handleRequest(intentMap);
});

編輯 ：

我在index.js中添加了：

`const request = require('request-promise-native');`

並在package.json中 ：

"request-promise-native": "^1.0.5",
"request": "^2.88"

謝謝你的幫助。

Answer 1

return request.get(url)

已將請求定義為請求對象，在這種情況下，它將嘗試獲取請求屬性。

如果要獲取某些內容，則必須使用其他類似請求承諾的內容。 https://www.npmjs.com/package/request-promise

Answer 2

解決方案是

添加index.js ：

`const rp = require('request-promise-native');`

並在package.json中 ：

"request-promise-native": "^1.0.5",
"request": "^2.88"

並將請求更改為rp 。 如下：

return rp.get(url)