'use strict';

const http = require('http');

const fetch = url => new Promise((resolve, reject) => http.get(url, res => {

if (res.statusCode !== 200) {

reject(`Status Code: ${res.statusCode}`);

return;

}

res.setEncoding('utf8');

const lines = [];

res.on('data', chunk => lines.push(chunk));

res.on('end', () => resolve(lines.join()));

}));

// Usage

fetch('http://ietf.org/')

.then(body => console.log(body))

.catch(err => console.error(err));