如何调用外部API，然后从hapi.js Api中返回此数据 [英] How to call an external API then return this data from an in hapi.js Api

问题描述

我是Hapi.js节点扩展的新手.

I am new to the Hapi.js node extension.

我正在尝试将外部API调用到服务器中，因为外部API受CORS保护，并且无法从前端(角度9)进行调用.

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).

所以我用路由等设置了我的hapi服务器，现在在一条路由中，我试图导入外部数据，并且当前端调用我的hapi api的路由时，它将显示来自外部API的数据.

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.

我没有找到任何文档或关于此问题的主题，如果您可以向我提供一些信息，那将非常有帮助！

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!

(我想通过路由solcast进行外部API调用)

这是我的 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();

这是我的 solcast.js :

这在console.log时出现错误:

This while console.log the error :

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

然后console.log数据.我假设返回完成后未收到数据.

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)

    }

}

谢谢您的帮助，如果您需要任何其他信息，请联系我.

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

推荐答案

正如抛出的错误所暗示的那样， hapi.js 中的 handler 必须返回一个值，一个诺言或抛出错误.

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

在您的情况下， handler 是异步操作，因此您必须返回一个Promise.

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

由于 fetch 已经创建了一个承诺，如果您在处理程序中返回由 fetch 创建的承诺，就足够了:

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));
    }
}

这篇关于如何调用外部API，然后从hapi.js Api中返回此数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！