pusher-url is a package for Node.JS that makes it even easier to use the awesome Pusher service in a Node.JS app on Heroku.
Inside your Heroku-enabled app directory:
$ heroku addons:add pusher:sandbox
$ npm install pusher-url
By default configuration parameters are taken from the PUSHER_URL
environment variable that Heroku automatically sets for you when you add
the Pusher addon. For local development you might want to set it on your
local machine as well (grab the URL from heroku config and set it with
export PUSHER_URL=<url>. Check
autoenv if you don't save
keystrokes.
// get connection parameters from environment
var pusher = require('pusher-url').connect();
// set a specific URL
var pusher = require('pusher-url').connect('http://<key>:<secret>@api.pusherapp.com/apps/<appid>');