未处理的拒绝:发送后不能设置标头
未处理的拒绝:发送后不能设置标头
提问于 2018-05-29 13:34:17
我在Dialogflow中创建了一个聊天机器人。当数据库抛出未处理的拒绝错误时，我试图将数据添加到数据库中。
这是我的index.js文件。
'use strict';
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
//const {Card, Suggestion} = require('dialogflow-fulfillment');
var admin = require('firebase-admin');
//require("firebase/firestore");
admin.initializeApp(functions.config().firebase);
var firestore = admin.firestore();
//var db = firebase.firestore();
process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements
var addRef = firestore.collection('Admission');
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));
console.log("request.body.queryResult.parameters: ", request.body.queryResult.parameters);
let params = request.body.queryResult.parameters;
/* 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?`);
} */
let responseJson ={};
function yourFunctionHandler(agent) {
var docRef = firestore.collection('users');
name = request.body.queryResult.parameters['myname'];
coll = request.body.queryResult.parameters['college_name'];
name = name.charAt(0).toUpperCase() + name.slice(1);
let balanceresponse = {};
console.log(name);
return docRef.add({
myname: name,
college: coll
})
.then((querySnapshot)=>{
balanceresponse = {
"fulfillmentText": 'Sure '+name+', Do you want to know about Admissions, Fees, Graduates and PG, Contact information, Media or Testimonials?'
}
console.log('before response.send()');
response.send(balanceresponse);
/* console.log('before response.send()');
response.send({
fulfillmentText:
'Sure '+name+', Do you want to know about Admissions, Fees, Graduates and PG, Contact information, Media or Testimonials?'
//response.json(responseJson);
}); */
console.log('after response.send()');
return 1;
})
.catch(error => {
response.send({
fulfillmentText:
'Something went wrong with the database'
});
});
}
function AdmissionHandler(agent) {
console.log("inside Admission Handler");
let balanceresponse = {};
let Question = request.body.queryResult.parameters['question'];
addRef.where("Question", "==", Question)
.get().then((querySnapshot)=>{
if (querySnapshot) {
console.log("Document data:");
const tips = querySnapshot.docs;
const tipIndex = Math.floor(Math.random() * tips.length);
const tip = tips[0];
balanceresponse = {
"fulfillmentText": ' Anything else you wanna know?'
}
console.log('before response.send()');
response.send(balanceresponse);
/* response.send({
fulfillmentText:
//firestore.collection(addRef.Answer)+
' Anything else you wanna know?'
}); */
return 1;
} else {
// doc.data() will be undefined in this case
console.log("No such document!");
}
return 1;
})
.catch(function(error) {
console.log("Error getting document:", error);
});
}
// 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('GetName', yourFunctionHandler);
intentMap.set('AdmissionCustom', AdmissionHandler);
agent.handleRequest(intentMap);
});这是我收到的错误：
我在这里看到了几个类似的问题，但没有一个得到回答。有人能帮帮忙吗？我已经被困在这里一个多星期了。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-05-29 23:14:10
问题是yourFunctionHandler(agent)函数异步执行操作，但没有返回Promise。相反，它不返回任何内容，因此处理立即返回，而不发送消息。
因为它看起来像是myDoc.add()返回了一个Promise，所以这很容易通过生成return myDoc.add(...).then(...)等方法来处理。它可能看起来像这样：
function yourFunctionHandler(agent) {
return docRef.add({
myname: name,
college: coll
})
.then(()=>{
response.send({
fulfillmentText:
'Sure '+name+', Do you want to know about Admissions, Fees, Graduates and PG, Contact information, Media or Testimonials?'
});
return 1;
})
.catch(error => {
//console.log('érror',e);
response.send({
fulfillmentText:
'Something went wrong with the database'
});
});
}此外，您可以自己处理响应(通过调用response.send())和使用Dialogflow agent.handleRequest()，这将为您创建响应。
您应该使用Dialogflow方法生成回复，如下所示
agent.add("No such document found.");或者自己使用JSON中的值来确定要调用哪个处理程序，例如
const intentName = request.body.queryResult.intent.name;
const handler = intentMap[intentName];
handler();(您可能需要对此进行更改。从您的代码看，您使用的是Dialogflow v1，我已经反映了这一点，并且v2的意图名称的路径发生了更改。您还应该检查处理程序是否不存在、可能想要发送参数等。)
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原文链接：
https://stackoverflow.com/questions/50576932
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