Simon Willison’s Weblog

15 items tagged “atom”

pubsubhubbub. From Brad Fitzpatrick, a simple but clever way of using web hooks (HTTP callbacks) to inform subscribers that an Atom feed has updated in almost real-time—solving the constant polling problem and making it easier for small sites to offer publish-subscribe APIs. Any Atom feed can delegate subscriber updates to a “hub” server. An example hub server implementation is provided running on App Engine. # 20th April 2009, 6:49 pm

A few notes on the Guardian Open Platform

This morning we launched the Guardian Open Platform at a well attended event in our new offices in Kings Place. This is one of the main projects I’ve been helping out with since joining the Guardian last year, and it’s fantastic to finally have it out in the open.

[... 839 words]

Magnificent Seven—the value of Atom. The seven core things that Atom solves so that you don’t have to. # 19th October 2008, 10:24 pm

FriendFeed Blog: Simple Update Protocol. FriendFeed infamously poll RSS feeds on the 43 services they support millions of times an hour in an effort to keep their content as real-time as possible. SUP is a new proposal by FriendFeed for a sort of “master feed” of changes to a site—instead of hitting the Flickr feed for each of their users they would just poll Flickr’s SUP feed every minute or so to find out who had uploaded a new photo, and only retrieve the RSS feed for those users. # 28th August 2008, 12:16 pm

Flickr Developer Blog: API Responses as Feeds (via) Flickr API calls that return a “standard photos response” (e.g. flickr.photos.search and flickr.favorites.getList) can now output eight different feed formats as well, including Atom, RSS flavours, geoatom, geordf and KML. Error codes are returned as X-FlickrErrCode HTTP headers. # 25th August 2008, 10:20 pm

RSS Duplicate Detection. “Detecting duplicate items in an RSS feed is something of a black art”. I hadn’t realised quite how involved such a basic function of an aggregator could be. # 22nd January 2008, 8:11 pm

HTTP Cache Channels (via) Interesting extension to the HTTP caching model by Mark Nottingham: caches can be told to subscribe to an Atom feed which alerts them to cached data that has gone stale. Group invalidation is also supported. # 4th January 2008, 12:48 pm

Updates to template_utils. James Bennett’s Django template_utils library now provides tags for consuming external RSS and Atom feeds. Combine with template fragment caching for an instant mashup written just using templates. # 10th December 2007, 3:25 pm

Atom Models. Building Python classes that act as utility wrappers around data stored in an lxml DOM object. # 7th August 2007, 4:02 pm

Google AJAX Feed API (via) Simple cross-domain proxy to allow JavaScript to access any publically addressable syndication feed, with the same logic as Google Reader providing normalisation. # 18th April 2007, 5:29 pm

Triplr. Ultra simple GET-based web service for converting RSS / Atom / RDF / Microformats+GRDDL to HTML / ntriples / RDF / RSS / JSON / Turtle. Small pieces, loosely joined. # 30th March 2007, 3:30 pm

Pipes. New Yahoo! service for combining and remixing Atom/RSS feeds using a really sophisticated drag-and-drop UI. # 8th February 2007, 7:52 am

Gmail Atom feeds. Could be useful as a pipe for creating an e-mail interface to an existing Atom-consuming application. # 16th January 2007, 2:50 pm

Atom API for AOL Journals. AOL are doing some really cool things with the Atom Publishing Protocol. # 10th January 2007, 11:06 pm