async download bundler

zipserver.js

const http = require('http');
const archiver = require('archiver');
const request = require('request');

const urls = [
  'http://www.colorado.edu/conflict/peace/download/peace.zip',
  'http://www.colorado.edu/conflict/peace/download/peace_essay.ZIP',
  'http://www.colorado.edu/conflict/peace/download/peace_example.ZIP',
];

http.createServer((req, response) => {
  response.writeHead(200, {
    'Content-Type': 'application/zip',
    'Content-disposition': 'attachment; filename=bundle.zip'
  });

  const archive = archiver('zip');
  archive
  .on('error', console.error)
  .pipe(response);

  urls.forEach((url) => {
    archive.append(request(url), { name: url.split('/').slice(-1)[0] })
  });

  archive.finalize();
}).listen(process.env.PORT || 3030);