Request example

const http = require('http');
var querystring = require('querystring');
const { performance } = require('perf_hooks');

const t1 = performance.now();
var post_data = querystring.stringify({});

// An object of options to indicate where to post to
var post_options = {
    host: 'localhost',
    port: '3000',
    path: '/',
    method: 'POST',
    headers: {
        'Content-Type': 'application/json;charset=utf-8',
        'Content-Length': Buffer.byteLength(post_data),
    },
};

const post_req = http
    .request(post_options, (resp) => {
        resp.setEncoding('utf8');
        let data = '';

        // A chunk of data has been received.
        resp.on('data', (chunk) => {
            data += chunk;
        });

        resp.on('end', () => {
            const t2 = performance.now();
            console.log('duration', t2 - t1);

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

post_req.write(post_data);
post_req.end();