node-download-image.js

import fs from 'fs';
import request from 'request';

/**
 * Download and save a file to the project root
 *
 * Courtesy of http://stackoverflow.com/a/12751657/2803743
 */
export const download = function(uri, filename, callback) {
  request.head(uri, function(err, res, body) {
    console.log('content-type:', res.headers['content-type']);
    console.log('content-length:', res.headers['content-length']);

    request(uri).pipe(fs.createWriteStream(filename)).on('close', callback);
  });
};