May 2011
Beginner
408 pages
10h 27m
English
Content preview from Facebook® Application Development For Dummies®Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Finding the Hubbub about PubsubHubbub
At the time of this writing, one of the more popular real-time updating services is a protocol called PubsubHubbub. As funny as the name sounds, It's actually quite an efficient way of subscribing to real-time updates, with the capability to insert a “hub” in the middle so that the content provider doesn't have to do all the heavy work if it doesn't want to.
A typical PubsubHubbub workflow involves a subscriber, a hub, and a publisher. It works like this (see Figure 11-1):
- The subscriber does a typical RSS or Atom request to the publisher's feed.
The publisher's feed includes an item in the feed, directing the subscriber to a hub for that feed where it can subscribe to get future updates.
- The subscriber notifies the hub, via the specified URL, that it wants to get updates from the publisher.
The subscriber sends the hub a URL that the hub can notify the subscriber with when it has new updates.
- When the publisher has new updates, it notifies the hub that it has new updates. The hub then requests those updates, and the publisher sends those updates to the hub.
- The hub then posts the new update to the subscriber via the URL that the subscriber sent to the hub in Step 2.
If multiple subscribers exist, the hub posts to all the subscribers.
The goal of PubsubHubbub is to provide a means for publishers to reduce the load on their servers through one or multiple hubs through which subscribers can subscribe.
Figure 11-1: The general workflow of a ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.