comet in vivotek network camera

Comet in VIVOTEK Network CameraKent Chen (Kaie)

Kent Chen (Kaie)

chenkaie@gmail.com

http://chenkaie.blogspot.com

@chenkaie on GitHub

@chenkaie on SlideShare

@chenkaie on LinkedIn

@chenkaie on Twitter

Problem?

Server side (Network Camera)

Data SYNC

Client side (Browser)

Real-Time (more responsive)

Requirement.e.g., DO status, Audio volume, ...

Solutions!

PollingSucks

Old school

Not fashion

Another CGI attacks …XD

Long PollingInfeasible on embedded Linux

WebSocket IE Sux

Browser compatible issue

Hidden IFrame Technique

Browser busy loading state

always (bad UX)

CometLong-held HTTP connection

Lower overhead

Comet on

M$ IE

Hidden IFrame via HTMLFile ActiveX Object

Client side

Server side

Comet on

non-M$ IE

XMLHTTPRequest Interactive State

Server side

Client

side

ReferenceWhat 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