Since then I’ve always thought it would be cool to extend the size of the drawing space to become an unlimited sized canvas? Well that’s what I hope to have working soon.
The canvas element will span the entire browser screen and gets divided up into tiles which can be retrieved and saved from a server using a RESTful API. This might be a great opportunity to experiment with the new HTTP/2 (formerly known as SPDY) server implementations as it may enable the ability to request a region and receive a range of adjacent tiles all in one response rather than requesting each one. I am currently using a small Java JAX-RS 2.0 implementation in Tomcat but might switch to a more productive framework such as Rails or Python Flask.
Real time user events such as mouse move events from other people will be sent down a WebSocket connection and relayed to all connected users to display a cursor where others are drawing.
With GET and PUT operations working, hopefully there will be a working prototype for people to try out very soon in the browser.