Three different ways with https.get() in node.js

httpRequest.js

const https = require('https');

https.get('https://google.com', resp => {
    let data = '';

    resp.on('data', chunk => data += chunk);
    resp.on('end', () => console.log(data));
}).on('error', err => console.log(`Error: ${err}`));

httpRequestAsync.js

const https = require('https');

function getAsync(url) {
    return new Promise((resolve, reject) => {
        https
        .get(url, resp => {
            let data = '';

            resp.on('data', chunk => data += chunk);
            resp.on('end', () => resolve(data));
        })
        .on('error', err => reject(err));
    });
}

// due to SyntaxError: await is only valid in async function
(async () => {
    try {
        const data = await getAsync('https://google.com');
        console.log(data);
    } catch (err) {
        console.log(`err: ${err}`);
    }
})();

httpRequestPromise.js

const https = require('https');

const promise = new Promise((resolve, reject) => {
    https
    .get('https://google.com', resp => {
        let data = '';

        resp.on('data', chunk => data += chunk);
        resp.on('end', () => resolve(data));
    })
    .on('error', err => reject(err));
});

promise.then(data => {
    console.log(data);
})
.catch(err => {
    console.log(err);
});

requestAsync.js

const request = require('request');

const requestPromise = (url) => new Promise((resolve, reject) => {
    request(
        url,
        { json: true},
        (err, res, body) => {
            if (err) {
                reject(err);
                return;
            }

            resolve(body);
        });
    });

(async () => {
    try {
        const body = await requestPromise('https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY');
        console.log(body);
    } catch (err) {
        console.log(err);
    }
})();

requestCallback.js

const request = require('request');

request(
    'https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY',
    { json: true},
    (err, res, body) => {
        if (err) {
            return console.log(err);
        }

        console.log(body.url);
        console.log(body.explanation);
    });

requestPromise.js

const request = require('request');

const requestPromise = (url) => new Promise((resolve, reject) => {
    request(
        url,
        { json: true},
        (err, res, body) => {
            if (err) {
                reject(err);
                return;
            }

            resolve(body);
        });
    });

requestPromise('https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY')
    .then(console.log)
    .catch(console.log);