pubsubhubbub - Google Code
http://code.google.com/p/pubsubhubbub/

pubsub appengine atom http webhooks

A simple, open, server-to-server web-hook-based pubsub (publish/subscribe) protocol as a simple extension to Atom.

A simple but clever way of using web hooks (HTTP callbacks) to inform subscribers that an Atom feed has updated in almost real-time.

A simple, open, web-hook-based pubsub protocol & open source reference implementation.

Une architecture distribuée de Pub/Sub avec HTTP

The best part about Webhooks is that most of us are already familiar with them: callbacks over HTTP. Pioneered by PayPal and Subversion as a way to send real-time notifications to the client, they have found their way into many dozens of products we all use every day. Need pre or post commit hooks for your SVN or Git repository? Both GitHub and SVN support HTTP callbacks. Need a payment alert from PayPal, or an alert when a wiki page is modified? There are webhooks for that too. This simple mechanism allows us to build web services that work together via a simple and ubiquitous protocol we can all understand: HTTP!

"We offer this spec in hopes that it fills a need or at least advances the state of the discussion in the pubsub space. Polling sucks. We think a decentralized pubsub layer is a fundamental, missing layer in the Internet architecture today and its existence, more than just enabling the obvious lower latency feed readers, would enable many cool applications, most of which we can't even imagine. But we're looking forward to decentralized social networking."

With all the recent buzz about real-time web, surely this is the year XMPP/AMQP Publish-Subscribe (PubSub) makes it to the big leagues! Or maybe not. Ejabberd (XMPP), RabbitMQ (AMQP) and other pubsub server implementations have come a long way but they remain cumbersome to setup and maintain,

WebHooks or PubSubHubBub are designed to simplify and optimize the web.

to get a URL that will run this code.

A really neat Google App that lets you enter a code snippet in js, PHP or Python, and then run it if you so desire with GET and POST vars; if that's not enough, you can also fire off an HTTP POST to a third party server. So what? So if you ever have a code fragment you need to host and want to be able to call with a variable or two, this service is ideal :-) The perfect accompaniment to a Yahoo Pipe:-)

You should care because webhooks will be ubiquitous. You should care because they’re going to reshape the internet. You should care because webhooks are the next step in the evolution of communication on the internet and nothing will be left untouched.

"Webhooks are user-defined HTTP callbacks. Here’s a common example: You go to github. There’s a textbox for their code post webhook. You drop in a URL. Now when you post your code to github, github will HTTP POST to your chosen URL with details about the code post. There is no simpler way to allow open ended integration with arbitrary web services. -- You should care because webhooks will be ubiquitous. You should care because they’re going to reshape the internet. You should care because webhooks are the next step in the evolution of communication on the internet and nothing will be left untouched." -- Timothy Fitz

"pubsub via webhooks"

Looks awesome. Going to dig into the implementation Real Soon Now...

GR: Watercoolr - Gossip for web applications http://tinyurl.com/lz8uxf [from http://twitter.com/robinhowlett/statuses/2092003645]