Comet in VIVOTEK Network Camera

Comet in VIVOTEK Network Camera.
Comet: Comet is a web application model in which a long-held HTTP request allows a web server to push data to a browser, without the browser explicitly requesting it.

Transcript

1. Comet in VIVOTEK Network Camera Kent Chen (Kaie)
2. Kent Chen (Kaie) chenkaie@gmail.com http://chenkaie.blogspot.com @chenkaie on GitHub @chenkaie on SlideShare @chenkaie on LinkedIn @chenkaie on Twitter
3. Problem?
4. Server side (Network Camera)  Data SYNC  Client side (Browser)
5. Real-Time (more responsive) Requirement. e.g., DO status, Audio volume, ...
6. Solutions!
7. Polling Sucks Old school Not fashion Another CGI attacks …XD
8. Long Polling Infeasible on embedded Linux
9. WebSocket IE Sux Browser compatible issue
10. Hidden IFrame Technique Browser busy loading state always (bad UX)
11. Comet Long-held HTTP connection Lower overhead
12. Comet on M$ IE
13. Hidden IFrame via HTMLFile ActiveX Object Client side Server side
14. Comet on non-M$ IE
15. XMLHTTPRequest Interactive State Server side Client side
16. Reference What else is burried down in the depth’s of Google’s amazing JavaScript? Comet：基于 HTTP 长连接的“服务器推”技术 Browser 與 Server 持續同步的作法介紹 (Polling, Comet, Long Polling, WebSocket) Comet Programming: the Hidden IFrame Technique HTTP Streaming Meteor Comet: Low Latency Data for the Browser