A-IM: feed support

User agents of clients that provide support for the RFC 3229 "feed" instance manipulation method:

Bloglines/2.0 (http://www.bloglines.com; 8 subscribers)

This data is gathered from looking at the Apache server logs for today and yesterday. Bob Wyman is tracking implementations of RFC3229 with "feed".

Note: this list may include browsers who merely "stumbled upon" the correct URLs of the history files

 I'm pretty sure that the hits from curl and Safari were from me experimenting with it.

Posted by Simon Willison at
Simon: that's quite OK, feel free to experiment all you want.  ;-)

Posted by Sam Ruby at

Sam: I'm now triggering my delta-generation code on the existence of A-IM: feed, and I've included a little snippet of code that logs the request header and the delta delivered... so I should be able to compile a list of compatible clients without any false positives.

Whether or not I'm doing any of this appropriately is up for debate, of course. :)

Posted by Roger Benningfield at

Implementations of RFC3229 with "feed"

[Updated: 19-Sept-2004 14:49] While there continues to be a raging debate about whether "Microsoft's flip-flop may signal blog clog", some folk are actually working on solving the problem that Microsoft's experience has emphasized... We're beginning...

Excerpt from As I May Think... at

A response using delta encoding must be identified using the "IM" response-header. But your server returns "A-IM" header. Not quite accurate.

Posted by Alexeo at
Alexeo: Thanks!  Fixed.

Posted by Sam Ruby at

On the Bloglines API

Andrew Grumet's Weblog: Bloglines press release: "In addition to helping address bandwidth concerns, Bloglines Web Services transform hundreds of thousands of existing feeds into 'clean RSS' and insulates developers from the current blog syndication format wars. This interoperability will encourage broad adoption of news feed technology among content publishers and consumers." Step back and ponder for a minute what a bold statement that is. I don't mean the bits about the politics or bandwidth savings. How do you feel about the prospect of having a Bloglines middleman at the heart of your blogosphere? This is a fundamentally different kind of... [more]

Trackback from Too Much News at

Massive Bandwidth Savings proven! (Empirical Evidence of RFC3229 feed savings...)

The case for RFC3229 feed support is logical and should be clear to anyone implementing syndication software (RSS or Atom). However, logic is always best backed up by empirical evidence. Thus, I've done an analysis of recent accesses to RSS and... [more]

Trackback from As I May Think... at

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