Simple way to pull images from and RSS feed and download them to local storage with Node.js

app.js

#!/usr/local/bin/node

/**
 * Dependencies
 */

var app = require('commander')
  , FeedParser = require('feedparser')
  , fs = require('fs')
  , request = require('request')
  , _ = require('lodash');

app
  .version('0.0.1')
  .option('-d, --directory [path]', 'Target directory for downloading files into.', './imgs/')
  .option('-s, --source [source]', 'Source Feed', 'http://feeds.nationalgeographic.com/ng/photography/photo-of-the-day/')
  .parse(process.argv);

feedPull(app.source, function(err, items) {
  if (err) throw err;

  _.forEach(items, function(item) {
    var fileName = item.title.replace(/\W/g, '');
    var filePath = app.directory + fileName + '.jpg';

    request(item.link).pipe(fs.createWriteStream(filePath));
  });
});

function feedPull(url, cb) {
  var items = [];

  request(url)
    .on('error', function(err) {
      return cb(err);
    })

    .pipe(new FeedParser())

    .on('meta', function(meta) {
      //
    })

    .on('readable', function() {
      var stream = this;
      var item = stream.read();

      items.push({ title: item.title, link: item.enclosures[0].url });
    })

    .on('end', function() {
      return cb(null, items);
    });
}