index.js

var applescript = require('applescript');

// If you use a different shortcut in BeardedSpice, you'll need to modify the AppleScript
var script = 'tell application "System Events" to keystroke "b" using command down & shift down & option down & control down';

var express = require('express');
var app = express();

app.get('/', function (req, res) {
    var timestamp = Math.round(new Date().getTime()/1000).toString();

    res.send('<a href="/toggle/?timestamp=' + timestamp + '" style="color: #000000; text-decoration: none; font-size: 2em; line-height: 1.4em; font-family: Helvetica, Arial, san-serif;"><div style="background-color: #EEEEEE;text-align: center; box-shadow: 0px 5px 10px 2px rgba(0,0,0,0.12); border-radius: 5px; max-width: 750px; border: 1px solid #AAAAAA; margin: 0 auto; margin-top: 50px; height: 50px;">Play/pause again</div></a>');
});

// Using a timestamp to make sure the request is fresh
// I had an issue where my browser was trying to fetch the thumbnail and toggling the music
app.get('/toggle/', function (req, res) {
    var now = Math.round(new Date().getTime()/1000).toString();

    var timestamp = req.query.timestamp || 1;
    diff = now - timestamp;

    if(diff <= 100) {
        console.log(new Date().toISOString() + ' ' + req.ip + ' Toggle!');
        applescript.execString(script, function(err) {});
    } else {
      console.log(new Date().toISOString() + ' ' + req.ip + ' Invalid timestamp');
    }

    res.redirect('/');
});

// Use this as an API, rather than in a browser
app.get('/flic', function (req, res) {
    console.log('Force Toggle!');
    applescript.execString(script, function(err) {});
    res.redirect('/');
});

app.listen(3000, function () {
    console.log('SoundSpice app listening on port 3000!');
    console.log('GET /toggle to play/pause music');
});