Urly API for Node.js

urly.js

var http = require('http');

function urly(url, cb) {
  // Options for API call
  var options = {
    host: 'urly.fi',
    port: 80,
    path: '/api/shorten/?url=' + url}
    , code = '';
  // Named functions
  function data (d) { code += d; }
  function done ()  { cb(null, 'http://urly.fi/' + code); }
  function UrlyError(e) {
    this.name = "UrlyError";
    this.message = "Urly API call failed with error code " + e;
  }
  UrlyError.prototype = new Error();
  UrlyError.prototype.constructor = UrlyError;
  // HTTP GET
  http.get(options, function(res) {
    if (res.statusCode !== 200) { cb(new UrlyError(res.statusCode)); }
    else { res.on('data', data).on('end', done); }
  }).on('error', cb);
}