Download files to the filesystem on the meteor server

meteor_download.js

//given the urls of files to download, store them on the filesystem
  function download_all_files (urls, base_destination, job_id, cb) {
    var url = urls.shift();
    var file_path = path.join(base_destination, job_id);

    // the path to the file without the filename
    var path_to_file_folder = path.dirname(file_path);

    // the method to store a downloaded file to the fs
    // makes an http request and writes the response to a file
    function download_url_to_fs () {
      var file = fs.createWriteStream(file_path);
      var request = https.get(url, function(response) {
        response.pipe(file);
        file.on('finish', function() {
          file.close();
          if(urls.length > 0){
            download_all_files(urls, base_destination, job_id, cb);
          } else {
            cb();
          }
        });
      });
    }

    // bind download_url_to_fs to a meteor fiber
    var bound_download_url_to_fs = Meteor.bindEnvironment(download_url_to_fs, function (e) {
      throw e;
    });

    // verify the required paths exist or create it
    // and then download the file to from http to the js
    mkdirp(path_to_file_folder, 0777, bound_download_url_to_fs);
  }