WebSockets (sflive2012)

Transcript

1. WEBSOCKETS
2. • Symfony2 • Silex • Composer igorw @igorwesome
3. WEBSOCKETS
4. WEB
5. Application HTTP Presentation TCP Session TCP Transport TCP Network IP Data Link Physical
6. Application HTTP Presentation TCP Session TCP Transport TCP Network IP Data Link Physical
7. client
8. request client
9. reponse client request
10. THIS IS A GOOD THING
11. BUT
12. NOT FOR EVERYTHING
13. UNIDIRECTIONAL
15. LATENCY
16. LATENCY KEEP-ALIVE PIPELINING SPDY
17. STATELESS
18. Application HTTP Presentation TCP Session TCP Transport TCP Network IP Data Link Physical
19. Application HTTP Presentation TCP Session TCP Transport TCP Network IP Data Link Physical
20. WEBSOCKETS
21. SOCKETS
22. WEBSOCKETS
23. PROTOCOL API
24. THE WEBSOCKET PROTOCOL
25. browser
27. • Handshake / Upgrade • TCP + framing • Proxies • Supports TLS (SSL)
28. RFC 6455
29. THE WEBSOCKET API
30. browser
31. var ws = new WebSocket('ws://example.org:8080/updates'); ws.onopen = function () { ws.send('hello'); }; ws.onmessage = function (event) { console.log(event.data); };
32. USE CASES •Games •Notifications •Collaboration •Statistics •Chat
33. 4.0+ (2009) 6.0+ (2011) 10.70+ (2012) 5.0+ (2010) 10+ (2012)
34. • transport abstraction (fallbacks) • broadcasting, reconnection, serialization, other stuff • monolithic! (and almost trying to fix it)
35. SOCKJS
36. var ws = new WebSocket(url);
37. var ws = new SockJS(url);
38. ASYNC STACK Connect Express SockJS
39. ASYNC STACK ? ? SockJS
40. ASYNC STACK EventMachine ? ? SockJS
41. ASYNC STACK ? ? SockJS
42. Y U NO PHP?
43. SYNC STACK Application
44. ASYNC Connect Express SockJS SYNC Application
47. *MQ
48. *MQ Sync Async
49. DEMO
50. DEBUGGING •printf •chrome inspector •wssh •ngrep •zmqc
51. RECAP • Use SockJS • Polyglot is the future • Learn from the MQs
52. LINKS • tools.ietf.org/html/rfc6455 • dev.w3.org/html5/websockets • sockjs.org
53. github.com/igorw/websockets-talk
54. CREDITS • thenounproject.com • stopwatch
57. nodephp.org github.com/cboden/Ratchet
58. Questions? @igorwesome speakerdeck.com /u/igorw joind.in/6586