node.js - nodeJS请求方法不起作用，我是现收现付计划

Question

我正在尝试从 firebase 云函数访问铁路 API，它给出了以下错误

我听说请求方法不适用于免费计划，但即使在我升级到即用即付计划后，它仍然不起作用

//参见https://github.com/dialogflow/dialogflow-fulfillment-nodejs//用于 Dialogflow 实现库文档、示例并报告问题

'use strict';
var request = require('request');
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');

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

   function welcome(agent) {

      var options = {
            url: 'http://api.railwayapi.com/v2/live/train/' + '17239' + '/date/' + '27-12-2018' + '/apikey/' + 'myjwjpywq4'
        }
        request(options, function (err, resp, body) {
console.log(body);

        })



     agent.add(`This message is from Dialogflow's Cloud Functions for Firebase editor!`);
         agent.add(new Suggestion(`Quick Reply`));
     agent.add(new Suggestion(`Suggestion`));
     agent.setContext({ name: 'weather', lifespan: 2, parameters: { city: 'Rome' }});
   }

  let intentMap = new Map();
  intentMap.set('Default Welcome Intent', welcome);
  intentMap.set('Default Fallback Intent', fallback);
 agent.handleRequest(intentMap);
});

错误:

TypeError: request is not a function
    at welcome (/user_code/index.js:33:9)
    at WebhookClient.handleRequest (/user_code/node_modules/dialogflow-fulfillment/src/dialogflow-fulfillment.js:303:44)
    at exports.dialogflowFirebaseFulfillment.functions.https.onRequest (/user_code/index.js:71:9)
    at cloudFunction (/user_code/node_modules/firebase-functions/lib/providers/https.js:57:9)
    at /var/tmp/worker/worker.js:725:7
    at /var/tmp/worker/worker.js:708:11
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickDomainCallback (internal/process/next_tick.js:128:9)

Answer 1

您对请求有两个定义。这是第一个:

var request = require('request');

这是第二个，它掩盖了函数体内的第一个:

exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {

当您在函数体内调用 request() 时，JavaScript 会认为您指的是最里面的 request，这是传递给它的第一个参数。这显然不是你想要的。此时，request 就不是一个函数了。

只需给它们不同的名称，这样它们就不会相互冲突。