Coffeescript snippet for accessing Google's URL-shortening service (not actually a question)

This isn't really large enough to warrant putting in git or whatever, so I'm just posting it here in case it's of use to anyone.

Coffeescript to generate a short url using Google's Goo.gl service. You need a Google API key to use this.

Written by Tony Hursh, awh@acm.org

MIT license.

Parameters url: the URL to shorten as a text string success_callback: a two-argument function to call if the call succeeds.

      First arg is the HTTP request status, second is the 
      response text.

error_callback: a two-argument function that's called if a network error occurs. Args are the same as success_callback

A successful call returns JSON-formatted text with the following layout:

{

  kind: urlshortener#url,

  id: (your shortened URL is here),

  longUrl: (the original URL is here)

}

apikey = "YOUR GOOGLE API KEY GOES HERE"
 
shorten_url = (url, success_callback, error_callback) ->
 
  xhr = Titanium.Network.createHTTPClient()
  xhr.open "POST", "https://www.googleapis.com/urlshortener/v1/url?key=" + apikey
  xhr.setRequestHeader "Content-type", "application/json"
  xhr.onload = () -> success_callback xhr.status, xhr.responseText
  xhr.onerror = () -> error_callback xhr.status, xhr.responseText
  content =  "{\"longUrl\": \"#{url}\"}"
  xhr.send content