A simple download function using request

download.js

//
// Simple download using 'request'
//
function download (localFile, remotePath, callback) {
  var localStream = fs.createWriteStream(localFile);

  request({ uri: remotePath, responseBodyStream: localStream }, function (err, response, stream) {
    if (err) return callback(err);

    else if (response.statusCode < 200 || response.statusCode >= 300) {
      callback(new Error('Invalid HTTP response code: ' + response.statusCode));
      return;
    }
    
    stream.on('close', function () {
      callback(null, localFile, localStream);
    });
  });
}