RocketIO Canvas share canvas on Sinatra RocketIO https://github.com/shokai/rocketio-canvas Demo http://canvas.shokai.org Install Dependencies % gem install bundler % bundle install Run % rackup config.ru -p 5000 => http://localhost:5000 set websocket port % WS_PORT=5001 rackup config.ru -p 5000 % WS_PORT=5001 rackup config.ru -p 5000 --env production