我的 Dialogflow Web 服务未检测到后续意图 [Nodejs]

Question

我有一个默认的回退意图，它有一个附加的后续回退意图(它是一个后续，也通过输出和输入上下文链接(。当我使用Dialogflow控制台测试这个功能时，它运行得很好。然而，当我通过我的API时，我不会得到同样的效果。有人能告诉我我的代码哪里出错了吗？

"use strict";
const express = require("express");
const bodyParser = require("body-parser");
const app = express().use(bodyParser.json()); // creates http server
const { JWT } = require("google-auth-library");
const dialogflow = require("dialogflow");
const uuid = require("uuid");
const token = "token"; // type here your verification token
const result = "";
app.get("/", (req, res) => {
// check if verification token is correct
if (req.query.token !== token) {
return res.sendStatus(401);
}
// return challenge
return res.end(req.query.challenge);
});
app.post("/", (req, res) => {
// check if verification token is correct
if (req.query.token !== token) {
return res.sendStatus(401);
}
// print request body
console.log(req.body);
//var request = req;
//console.log(req.body.result.parameters.testing);
console.log(req.body.result.resolvedQuery);
runSample();
/**
* Send a query to the dialogflow agent, and return the query result.
* @param {string} projectId The project to be used
*/
async function runSample(projectId = "projectid") {
// A unique identifier for the given session
const sessionId = uuid.v4();
// Create a new session
const sessionClient = new dialogflow.SessionsClient();
const sessionPath = sessionClient.sessionPath(projectId, sessionId);
// The text query request.
const request = {
session: sessionPath,
queryInput: {
text: {
// The query to send to the dialogflow agent
text: req.body.result.resolvedQuery,
// The language used by the client (en-US)
languageCode: "en-US"
}
}
};
// Send request and log result
const responses = await sessionClient.detectIntent(request);
console.log("Detected intent");
const result = responses[0].queryResult;
console.log(`  Query: ${result.queryText}`);
console.log(`  Response: ${result.fulfillmentText}`);
if (result.intent) {
console.log(`  Intent: ${result.intent.displayName}`);
//first not matched user query
if (result.intent.displayName === 'Default Fallback Intent')
{
result.fulfillmentText = 'Sorry, can you rephase your question?';
//result.fulfillmentText = 'Sorry, I am unable to answer your question';
}
if (result.intent.displayName === 'Default Fallback Intent - fallback')
{
//result.fulfillmentText = 'Sorry, can you rephase your question?';
result.fulfillmentText = 'Sorry, I am unable to answer your question';
} 
// return a text response
const data = {
responses: [
{
type: "text",
elements: [result.fulfillmentText]
}
]
};
// return a text response
res.json(data);
} else {
console.log(`  No intent matched.`);
}
}
});
// listen for requests :)
const listener = app.listen(3000, function() {
console.log("Your app is listening on port " + listener.address().port);
});

Answer 1

看起来既没有查看作为result的一部分发送回来的上下文，也没有在对sessionClient.detectIntent(request);的调用中发送任何上下文。Dialogflow只在上下文中维护状态，就像web服务器可能通过Cookie维护状态一样，所以它不知道是否设置了输出上下文，除非你在下一轮将其作为输入上下文发送。

因此，每个回退最终都被视为"默认回退意图"。