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'use strict';

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

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

const fetch = (url) => new Promise((resolve, reject) => {

const protocol = url.startsWith('https') ? https : http;

protocol.get(url, (res) => {

if (res.statusCode !== 200) {

const { statusCode, statusMessage } = res;

reject(new Error(`Status Code: ${statusCode} ${statusMessage}`));

}

res.setEncoding('utf8');

const buffer = [];

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

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

});

});

// Usage

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

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

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