The document discusses websockets and how they enable real-time, bidirectional communication between browsers and servers over a single TCP connection. It provides an overview of current HTTP limitations, introduces websockets as an improvement, and discusses browser support, implementations in Ruby, security considerations, and potential uses like chat, games, and real-time notifications.

1. WEBSOCKETS
WITH
RUBY
by Stoyan Zhekov

3. CURRENT WEB
( HTTP )
Broken!

4. CURRENT WEB (HTTP)
Request
Response
Close

5. Mailman

6. Real Time
Bidirectional
Full Duplex

8. SERVER TO SERVER
PubSubHubBub
XMPP

9. SERVER TO BROWSER
Polling
Long Polling
Streaming

11. PUSH!

12. PUSH TO BROWSER
Flash Socket
XMPP (BOSH)
WebSockets

13. “Comet is dead
long live
websockets”

14. “Comet is dead
long live
websockets”
-- Joe Armstrong

15. THEORY

16. http://www.websockets.org/
WEBSOCKETS
“WebSockets is a technology
providing for bi-directional,
full-duplex communications
channels, over a single Transmission
Control Protocol (TCP) socket,
designed to be implemented in
web browsers and web servers.”
--wikipedia

17. http://dev.w3.org/html5/websockets/
http://bit.ly/9ioTAl

18. BROWSERS
•Chrome 4.0+
• WebKit Nightly Builds
• Firefox 4.0 (Nov 2010)?

19. EMULATION
http://github.com/gimite/web-socket-js

20. WS://
WSS://

22. HANDSHAKE

23. DATA FRAME
0x00”...UTF-8...”xFF

24. SIMPLE

25. IMPLEMENTATION

26. Not
Easy

27. SECURITY

28. PERFORMANCE

29. COST

31. HELLO
WORLD

32. WHAT
YOU
WANT?

33. WHAT YOU WANT?
• Chat
• Stocks
• Games
• Real Time Notifications

34. GAMES
http://code.google.com/p/quake2-gwt-port/

35. REAL TIME NOTIFY
http://hummingbirdstats.com/

36. http://pusherapp.com/

37. EM-WEBSOCKET
http://github.com/igrigorik/em-websocket

38. http://rainbows.rubyforge.org/sunshowers/

40. http://heroku.com/
http://mongohq.com/