我正在从网站获取JSON。当我用console.log()打印时，一切都很好(我看到打印了所需的数据(，但是通过Intent传递的参数没有分配给变量，稍后我将导出该变量，因此Google助手会告诉我信息。
我做错了什么？ 下面的代码是在Dialogflow中运行的Google Cloud Function。
'use strict';
//This is what I say to get info out
//"Bus line 409 , bus stop nutrio bar"
const request = require('request');
let url = 'https://www.SAMPLESITE.com/Ajax/FindStationDevices?stationId=';
//Creating variables with sample data, that I'm always getting but not the real-time data from JSON.
var arriveInG = "15:15";
var delayG = "7:07";
var arriveTimeG = "13:44";
var distanceLeftG = "2.3 km";
// Import the Dialogflow module from the Actions on Google client library.
const {dialogflow} = require('actions-on-google');
// Import the firebase-functions package for deployment.
const functions = require('firebase-functions');
// Instantiate the Dialogflow client.
const app = dialogflow({debug: true});
// Handle the Dialogflow intent named 'blah-blah'.
// The intent collects a parameters named 'busline,busStop'.
app.intent('getBusTime', (conv, params) => {
const bLine = params.busline;
const bStop = params.busStop;
url+= bStop;
// These are to tell me if parameters are extracted correctly.
// conv.ask('Your lucky number is ' + bLine);
// conv.close(`You said ${num}`);
// conv.ask('Bus Stop is: ' + bStop + " ");
// conv.ask(' Bus Line is: ' + bLine);
// conv.ask(' URL is: ' + url);
request.get({
url: url,
json: true,
headers: {'User-Agent': 'request'}
},(err, res, data) => {
if (err) {
console.log('Error:', err);
} else if (res.statusCode !== 200) {
console.log('Status:', res.statusCode);
} else {
// do something here with received data
// data is already parsed as JSON:
// console.log(data.schedule[0].data[0].text);
var i;
for (i = 0; i < data.liveData.length; i++) { //
//Check if Live data is not null
if (data.liveData[i] !== null) {
//If bus line is the correct one from our question then...
if (data.liveData[i].allLines[0] == bLine) {
arriveInG = data.liveData[i].arriveIn;
arriveTimeG = data.liveData[i].arriveTime;
delayG = data.liveData[i].delay;
distanceLeftG = data.liveData[i].distanceLeft;
console.log("Bus Line number " + bLine +
" on Bus Stop " + bStop +
" will arrive in " + arriveInG);
console.log("The arrive time is " + arriveTimeG);
console.log("Distance left is " + distanceLeftG);
assingValues(arriveInG);
}
} else {
console.log("data.liveData[0] != null");
}
}
}
});
conv.ask(" Bus Line number " + bLine
+ " on Bus Stop " + bStop
+ " will arrive in " + arriveInG
+ ".The arrive time is " + arriveTimeG
+ ".Distance left is " + distanceLeftG);
});
function assingValues(arrival)
{
arriveInG = arrival;
}
// Set the DialogflowApp object to handle the HTTPS POST request.
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app);在囚徒的帮助下，工作代码是这样的：
'use strict';
const request = require('request');
const requestNat = require('request-promise-native');
let url = 'https://www.samplewebsite.com/Ajax/FindStationDevices?stationId=';
var arriveInG = "15:15";//sample inital values assigned.
var delayG = "7:07";//sample inital values assigned.
var arriveTimeG = "13:44";//sample inital values assigned.
var distanceLeftG = "2.3 km";//sample inital values assigned.
// Import the Dialogflow module from the Actions on Google client library.
const {dialogflow} = require('actions-on-google');
// Import the firebase-functions package for deployment.
const functions = require('firebase-functions');
// Instantiate the Dialogflow client.
const app = dialogflow({debug: true});
// Handle the Dialogflow intent named 'getBusTime'.
// The intent collects a parameter named 'busline', 'busStop'.
app.intent('getBusTime', (conv, params) => {
const bLine = params.busline;
const bStop = params.busStop;
url+= bStop;
return requestNat.get({
url: url,
json: true,
headers: {'User-Agent': 'request'}
}).then( body => {
// Process the body, which is already an object
// console.log(data.schedule[0].data[0].text);
var i;
for (i = 0; i < body.liveData.length; i++) { //
//Check if Live data is not null
if (body.liveData[i] !== null) {
//If bus line is the correct one from our qustion then...
if (body.liveData[i].allLines[0] == bLine) {
arriveInG = body.liveData[i].arriveIn;
arriveTimeG = body.liveData[i].arriveTime;
delayG = body.liveData[i].delay;
distanceLeftG = body.liveData[i].distanceLeft;
console.log("Bus Line number " + bLine +
" on Bus Stop " + bStop +
" will arrive in " + arriveInG);
console.log("The arrive time is " + arriveTimeG);
console.log("Distance left is " + distanceLeftG);
}
} else {
console.log("data.liveData[0] != null");
}
}
//Place the google assistant answer here
conv.ask(" Bus Line number " + bLine
+ " on Bus Stop " + bStop
+ " will arrive in " + arriveInG
+ ".The arrive time is " + arriveTimeG
+ ".Distance left is " + distanceLeftG);
}).catch( err => {
// Error handling
console.log('Error:', err);
});
});
// Set the DialogflowApp object to handle the HTTPS POST request.
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app);
// TO TEST Respond individually(put in body !!!)
// conv.ask('Your lucky number is ' + bLine);
// conv.close(`You said ${num}`);
// conv.ask('Bus Stop is: ' + bStop + " ");
// conv.ask(' Bus Line is: ' + bLine);
// conv.ask(' URL is: ' + url);
// Test Speach
// Bus line 409 , bus stop nutrio bar
// Bus line 148 , bus stop 53您这里有两个相关问题。
首先，如果您正在执行异步调用，则处理程序必须返回 Promise。否则，库不知道异步调用何时完成，拥有数据，您可以发回回复。
由于您正在进行HTTP调用，因此这是一个异步请求，因此需要使用Promise来完成。执行此操作的最简单方法是使用 request-promise-native 包而不是request包。
因此，代码的那部分可能如下所示：
const request = require('request');
return request.get({
url: url,
json: true,
headers: {'User-Agent': 'request'}
}).then( body => {
// Process the body, which is already an object
}).catch( err => {
// Error handling
});
第二个问题是您对conv.ask()的调用在具有响应的回调函数之外。在上面的代码中，它应该在它说"处理正文"的部分。