http://www.wired.com/images_blogs/gadgetlab/2011/05/google_io_f.jpg

Nice to meet you!

叶玎玎yedingding@gmail.com

https://github.com/sishen

@yedingding

@yedingdinghttp://weibo.com/presently

https://pragmatic.ly

Let’s Begin！

http://www.sneijers.net/wp-content/uploads/2011/12/web-150x150.jpghttp://www.lyngsat-logo.com/tvchannel/it/Real-Time.html

UX-driven evolution of Web

http://edudemic.com/wp-content/uploads/2012/07/future-400x300.jpg

What’s “Real Time”?

Show Me!

Instant Messaging

Apple Push Notification

Internet Game

http://s2.img.766.com/194/120217/1613/144125.jpg

Persistent Connection

Real Time in Web?

Persistent Connection

betweenBrower and Server

http://careers.accenture.com/Microsites/uk-graduate/PublishingImages/programmes/consulting/teach_first.jpg

But

Based on HTTP Protocol

Request - Response Protocol

Stateless Protocol

HTTP Protocol

Request - Response Protocol

Stateless Protocol

http://www.pdidevelopment.net/Images/picture/difficulty.jpg

Solutions

XHR Polling Long Polling HTTP Streaming Flash Socket WebSocket ….

XHR Polling

Long Polling

HTTP Streaming

Flash Socket

WebSocket

XHR Polling

LongPolling

HTTP Streaming

Flash Socke

t

WebSocket……

http://www.specialistpainphysio.com/wp-content/uploads/2012/08/thinking-pic.jpg

How to Choose?

Real Time Centric

Real Time Supplemental

VS

Real Examples

Pragmatic.ly

Pragmatic.ly

WebSocket XHR Polling Long Polling HTTP Streaming Flash Socket

Integration Fasthttp://thatimthing.com/wp-content/uploads/2011/02/HandsMovingFastOnKeyboard.jpg

Work Fast

http://www.devilslab.com/wp-content/uploads/2010/08/fast_snail_id86636_size350.jpg

Light Weighthttp://darkjade68.files.wordpress.com/2012/01/white-feather.jpg

SlangerOpen Source Pusher Server

Good for Dev

em-websocketEventMachine based

WebSocket Server

HipChat

HipChat

Long Polling XHR Polling HTTP Streaming Flash Socket WebSocket

BOSHBidirectional-Streams Over

Synchronous HTTP

https://upload.wikimedia.org/wikipedia/de/thumb/e/ea/Logo_XMPP_Standards_Foundation.svg/500px-Logo_XMPP_Standards_Foundation.svg.png

Easy to Scale

Easy to Extend

Works Everywhere

http://i.cmpnet.com/bmighty/images/slideshows/20090121/slide1A.jpg

Jabber Clients

RubyBOSH

stropherubylibstrophe.js

Twitter Web

Real Time is sugar

http://images.sciencedaily.com/2008/12/081210090819-large.jpg

Twitter Web

XHR Polling Long Polling HTTP Streaming Flash Socket WebSocket

http://www.dealz.ie/images/4347/original/simple.jpg

AcceptableSmart interval

Save Resource

Twitter Streaming API

Twitter Streaming API

HTTP Streaming XHR Polling Long Polling Flash Socket WebSocket

Low Overhead

Low Latency

API Friendly

RainbowThin

Rack::Stream

Weibo

Weibo Web

XHR Polling Long Polling HTTP Streaming Flash Socket WebSocket

Weibo IM

Long Polling XHR Polling HTTP Streaming Flash Socket WebSocket

Bayeux Protocol

Faye

Thank You!