Code to create spotify openable links.

gistfile1.js

// starts with spotify:track

// used defined input
input = 'spotify:track:6MdqqkQ8sSC0WB4i8PyRuQ';

var parts = input.match(/spotify\:track\:(.+)/)
if (parts.length !== 2) {
   return input;
}

var song_id = parts[1],
    url = 'http://logansbailey.com/ogp/?q=http://open.spotify.com/track/' + song_id,
    request = new XMLHttpRequest();

request.open('get', url, true);
request.onload = function() {
    var response = httpRequest.response;

    if (!response || !JSON.parse(httpRequest.response)) {
        response = {description: 'Unknown track on spotify'};
    } else {
        response = JSON.parse(httpRequest.response);
    }



    return '<a target="_blank" href="spotify://track:' + song_id + '">' response.description'</a>';
};