Content downloader used in Lambda@Edge function.

DownloadContent.js

const https = require('https');
const zlib = require('zlib');

const downloadContent = (url, callback) => {
  https.get(url, (res) => {
    let response;
    let body = '';

    if (res.headers['content-encoding'] === 'gzip') {
      response = res.pipe(zlib.createGunzip());
    } else {
      response = res;
    }

    response.on('data', (chunk) => {
      body += chunk;
    });

    response.on('end', () => {
      callback(true, body, res.headers);
    });
  }).on('error', (e) => callback(false, e));
};