How use dialogflow-fulfillment-nodejs with Express

问题:

I want use dialogflow fulfillment library into Express

This is my code:

import * as express from 'express';
import * as bodyParser from 'body-parser';
import * as dialogflowController from './controllers/dialogflow';

const app: express.Application = express();
app.use(bodyParser.json());
app.post('/echo', dialogflowController.doActions);
const http = require('http');
const httpServer = http.createServer(app);
httpServer.listen(80, function () { // ascolta sulla porta 80 per comando: ngrok http 80
  console.log('HTTP Started!');
});



// dialogflowController controller unit

import { Request, Response, NextFunction } from 'express';
const { WebhookClient, Card, Suggestion } = require('dialogflow-fulfillment');


export let doActions = (req: Request, res: Response, next: NextFunction) => {
  console.log('here it works');
  const agent = new WebhookClient({ req, res });
  console.log('crashes to the previous line');
};

And this is the error

Error: Request can NOT be empty.
[Node]     at new WebhookClient (D:\Progetti\node_modules\dialogflow-fulfillment\src\dialogflow-fulfillment.js:58:13)
[Node]     at exports.doActions (D:\Progetti\dist\controllers\dialogflow.js:14:19)
[Node]     at Layer.handle [as handle_request] (D:\Progetti\node_modules\express\lib\router\layer.js:95:5)

Can you help me? How can I use the dialogflow-fulfillment-nodejs library with Express?

回答1:

The WebhookClient constructor takes an option object with fields request and response. You named them req and res.

The constructor line should look something like this given the parameters you have to doActions():

const agent = new WebhookClient({
  request: req,
  response: res
});