test_cors.coffee

 # Create the XHR object.
  createCORSRequest = (method, url) ->
    xhr = new XMLHttpRequest
    if 'withCredentials' of xhr
      # XHR for Chrome/Firefox/Opera/Safari.
      xhr.open method, url, true
    else if typeof XDomainRequest != 'undefined'
      # XDomainRequest for IE.
      xhr = new XDomainRequest
      xhr.open method, url
    else
      # CORS not supported.
      xhr = null
    xhr

  # Helper method to parse the title tag from the response.

  getTitle = (text) ->
    text.match('<title>(.*)?</title>')[1]

  # Make the actual CORS request.

  makeCorsRequest = ->
    # All HTML5 Rocks properties support CORS.
    url = 'http://updates.html5rocks.com'
    xhr = createCORSRequest('GET', url)
    if !xhr
      alert 'CORS not supported'
      return
    # Response handlers.

    xhr.onload = ->
      text = xhr.responseText
      title = getTitle(text)
      alert 'Response from CORS request to ' + url + ': ' + title
      return

    xhr.onerror = ->
      alert 'Woops, there was an error making the request.'
      return

    xhr.send()
    return

  url = 'http://localhost:3000/api/v1/qualifications'
  xhr = createCORSRequest('options', url)
  console.log( xhr.send() )