2. 1. 문서 목적 및 범위
2. 개요 및 필요성

3. 구현현황(오픈소스) :
pywebsocket ,
Web Socket API (Web application WG) phpwebsocket,
jWebSocket,
web-socket- ruby,
Socket.IO-node
기타 :
응용 방안: W3C Web&TV,…
신규 표준 아이템? mobility..
Web RFID API

5. WebSockets
http://tools.ietf.org/wg/hybi/ http://www.w3.org/TR/websockets/

6. Network comunication
2007
API
WHATWG
Web Socket API
Server-Sent Events
W3C
Web App WG
HTML5 Web
Messaging
API
Network information
Device
API
Web real-time
WG
WRT
communication API
IETF
HyBI
Web socket protocol
DASH
MPEG
AHS(Adaptive HTTP
Streaming)
3GPP
WRAPI
(Web-Runtime API)
OpenCM(Connection
CD
Management) API
OMA
MobSocNet
(MSN Enabler)

7. 응용 분야 및 요구사항

8. 구현 방안
Application
Native
TCP/UDP/RTP
HTML Web App
Web
HTTP ???

9. HTML Protocol 동작 개요 : Polling

10. HTML 1.0 vs HTML 1.1 : : Polling
Connectionless
Stateless -> (해결) Server-side

12. Web Page Web Application
Text-based Protocol Two-Way Connection,
Connectionless, stateless Dynamic, Real-time,…
Polling Push

13. (참고) Long Polling vs HTTP Streaming
( 원본 : @Kuruma )

14. Goal : Two-Way Communication

15. This specification defines an API that enables Web pages to
use the WebSocket protocol for two-way communication
with a remote host.

16. a socket that works anywhere across the web
Bidirectional
TCP-based independent App protocol

17. 1. Script Execution
2. HTTP Handshake
• Port80, 443
3. WebSocket Data Transfer
@Kuruma

18. 1. WebSocket(url [, protocol])
2. Event Handlers
• Onopen
• Onmessage
• Onerror
• onclose
3. Methods
• Boolean send(data)
• Void close() @Kuruma

22. HTTP TCP
HTTP Upgrade Request
HTTP
1 Client Server
GET /chat HTTP/1.1
Host: example.com
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
Sec-WebSocket-Origin: http://example.com
Sec-WebSocket-Version: 6

23. HTTP TCP
HTTP Upgrade Request
HTTP
1 Client Server
HTTP TCP HTTP
2 Client Server
HTTP Switching Protocols Response
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=

24. HTTP TCP
HTTP Upgrade Request
HTTP
1 Client Server
HTTP TCP HTTP
2 Client Server
HTTP Switching Protocols Response
Web TCP WebSocket Messages Web
3 Socket Socket
WebSocket Messages
Binary or UTF8
Messages or streams

25.  Websocket Protocol 기능 보완
. 보안, 세션관리, Binary Data…

26. http://tools.ietf.org/wg/hybi/
http://www.w3.org/TR/websockets/
http://www.slideshare.net/rmoriz/pushing-the-web-websockets

29. ( 원본 : @Kuruma )

30. W3C W3C W3C API
API API Third
First Second Draft
Draft Draft
JAN IETF HyBi IETF v00 IETF v01 IETF v02 IETF v03 IETF v04 IETF v05 IETF v06 ~80 drafts APR
2009 First
[Revs 02 – 76] WG so far and 2011
Working Adopts still changing
Draft
1/9/09 4/23/09 10/29/09 12/22/09 5/23/10 9/1/10 9/24/10 10/17/10 1/11/11 2/8/11 2/9/11 2/25/11 3/11/11
Implemented Breaking change Potential Security Issue Identified
in browsers v.75 WebSockets v.76 WebSockets disabled