The Real-Time web

Elise Huard

Hype

Pushbutton web Anil Dash

Webhooks Jeff Lindsay

Relax

Nothing new !

callbacks over HTTP

(+ajax+push)

Callbacks ?

A function which should be called when something happens.

a callback is executable code that is passed as an argument to other code. It allows a lower-level software layer to call a subroutine (or function) defined in a higher-level layer. - Wikipedia

ex. before_save

Notification

Data syncing

Chaining

Modifications

Plugins

(Jeff Lindsay)

Notifications

examples:

Pubsub (hubbub)

Twitter Firehose

Ruby: Watercoolr

(test with Postbin)

Data sync

Twitter to Facebook

Google Wave

Google Docs

(also: browser push

ex. Juggernaut)

Chaining

like Unix pipes

Server1

Server2

Server3

event

callbackcallbackprocessing

Modifications/Plugins

Services on the web:

Allow the users to modify behaviour for their own use

allow external developers to extend functionality

'Programmability' of the web

Things to think about

Is HTTP really the best protocol for such things (TCP sessions) ? XMPP, AMQP

How will servers handle a high load of such processes ?

In which situations is this a real advantage ?

http://www.igvita.com/2009/06/29/http-pubsub-webhooks-pubsubhubbub/

http://www.slideshare.net/progrium/using-web-hooks

http://www.postbin.org

http://watercoolr.nuklei.com/

http://juggernaut.rubyforge.org/

http://www.pachube.com/

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