Using a Promise to return http.get response data

promise_http_get_data_example_node.js

/*
 *  Returning the "data" part of a http response
 *  with Node.js using "Promise"
 *
 *  Based on example code in the Node.js Documentation:
 *  https://nodejs.org/api/http.html#httpgetoptions-callback
 */

const http = require('node:http');

// Promise producer
let getHttpData = new Promise( function(getItDone, getItFailed)
{
    const req = http.get('http://localhost:8000/', (res) => {
        const { statusCode } = res;
        const contentType = res.headers['content-type'];
        let error;
        // Any 2xx status code signals a successful response but
        // here we're only checking for 200.
        if (statusCode !== 200) {
            error = new Error('Request Failed.\n' +
                              `Status Code: ${statusCode}`);
        } else if (!/^application\/json/.test(contentType)) {
            error = new Error('Invalid content-type.\n' +
                        `Expected application/json but received ${contentType}`);
        }
        if (error) {
            console.error(error.message);
            // Consume response data to free up memory
            res.resume();
            getItFailed( "FAIL 1" );
        }
        res.setEncoding('utf8');
        let rawData = '';
        res.on('data', (chunk) => { rawData += chunk; });
        res.on('end', () => {
            try {
                const parsedData = JSON.parse(rawData);
                console.log('LOG parsedData.data: ',
                            parsedData.data );
                outputData = parsedData.data;
                getItDone( outputData ) ;
            } catch (e) {
                console.error(e.message);
                getItFailed( "FAIL 2" );
            }
        });
    }).on('error', (e) => {
        console.error(`Got error: ${e.message}`);
        getItFailed( "FAIL 3" );
    });
    console.log('LOG : Made it to the end');
});

// Create a local server to receive data from
const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'application/json' });
  res.end(JSON.stringify({
    data: 'Hello World!',
  }));
});
// Start local server on port 8000
server.listen(8000);

// Promise consumer
getHttpData.then(
    function(value) {
        console.log('*** SUCCESS ***\n'
                    , value ,
                    '\n*** SUCCESS ***');
    },
    function(error) {
        console.log('*** FAIL ***\n',
                    error,
                    '\n*** FAIL ***');}
);