如何调用外部 API 然后从 hapi.js Api 返回此数据

Question

I am new to the Hapi.js node extension.

I am trying to call an external API into my server because the external API is protected with CORS and I can't call it from my front (Angular 9).

So I set up my hapi server with routes etc and now in a route I am trying to import the external data and when the front call the route of my hapi api it show the data from the external API.

I didn't find any documentation or already topics about this problem, if you could provide me with some information it would be very helpful!

(I want to do my external API call from the route solcast)

This is my index.js :

'use strict';

require('dotenv').config()
const Hapi = require('@hapi/hapi');

const init = async () => {

    const server = Hapi.server({
        port: 3000,
        host: 'localhost',
        routes: {
            cors: true
        }
    });

    server.route(require('./routes/base').test);
    server.route(require('./routes/solcast').solcast);

    await server.start();

    console.log('Server running on %s', server.info.uri);
};

process.on('unhandledRejection', (err) => {

    console.log(err);
    process.exit(1);
});

init();

This is my solcast.js :

This while console.log the error:

Error: handler method did not return a value, a promise, or throw an error

And then console.log the data. I assume that the data is not received when the return is done.

const joi = require('@hapi/joi');
const fetch = require("node-fetch");



exports.solcast = {

    method: 'GET',
    path: '/solcasttest',
    handler: (request, h) => {
        fetch("https://linkToTheExternalApi")
        .then(response => response.json())
        .then(data => {
            console.log(data)
            return data
        })
        .catch(err => console.log(err))
        console.log(testSolcast)

    }

}

Thank you for your help, if you need any other information hit me up.

Answer 1

As the error thrown suggests, a handler in hapi.js must return a value, a promise or throw an error.

In your case, the handler is an asynchronous operation, so you have to return a promise.

As fetch already creates a promise, it is enough if you return the promise created by fetch in your handler:

const fetch = require("node-fetch");

exports.solcast = {
    method: 'GET',
    path: '/solcasttest',
    handler: (request, h) => {
        return fetch("https://linkToTheExternalApi")
            .then(response => response.json())
            .then(data => {
                console.log(data)
                return data
            })
            .catch(err => console.log(err));
    }
}