IE7: Feeds with DTDs are not supported

by Volker Weber


Screenshot: Stefan Rubner

Comments

This was also a great suprise for me when I first saw it. I do not see any reason, why Internet Explorer 7 cannot process or at least ignore these DTDs.

I saw this in one of the betas and was very surprised: How hard would it have been to just skip the DTD-Line of the Feed? Instead Microsoft has to pay for the translation of this error message into all the languages Windows is available in. Not a good move, I guess.

Amazingly stupid. What were they smoking?

It's a "feature" of the underlying MSXML parser, a brute force way of stopping the "billion laughs" entity expansion denial of service attack. http://lists.xml.org/archives/xml-dev/200212/msg00479.html, As the linked post says, this is a bug in XML, and alternatives for dealing with it are all unappealing.

The "just skip the DTD" approach is something that sounds simple but is got problems too. What happens when something in the DTD is referenced in the XML ... defer the error until then? Quietly ignore that error?

The approach we take going forward is to enforce configurable limits on the number of entities to expand, but this will break some perfectly legitimate documents too.

Thanks Michael, very helpful (unlike some other posters).

Indeed.

Hi there i have the same problem .. how can be solved this one ?

Am experiencing the same issue.
But what is more odd is that when i test the feed from my localhost IIS server it works fine, however when i put it on the development server if fails.

NB. It fails after clicking the subscribe to this feed button.
however everything is fine in Outlook.

joseph ssenyange, 2007-07-17 13:13

It's because its a Google thing that Microsoft don't accept it I'll bet. It's their usual way of stifling competitors.

David Boulding, 2007-12-03 17:27

awwwwwwwww i was Youtube feeds..., same DtD bla bla comes up :(

my ipods getting lonely >.

Tony Badu, 2008-02-18 08:44

Here is a place that shows you how to make DTD work for IE7 for administrators.

http://blogs.msdn.com/rssteam/articles/PublishersGuide.aspx

Rev

Revenant One, 2008-04-15 21:36

explorer does not let me DTD

I had the same problem. All I needed to do was change the file from .rss to .xml and it worked. Stupid solution but maybe it can work for you, too.
Scott
www.siteforstarters.com

Post a comment











Shall I remember this for you?




Use your full name and a working email address. Unless you want your comment to be removed. No kidding.



Recent comments

wasim akram on Free Microsoft Product Activation Code at 13:04
Mike Brown on New Amazon EC2 Micro Instances for 2 cents an hour at 13:03
Mike Brown on New Amazon EC2 Micro Instances for 2 cents an hour at 13:02
Volker Weber on Sonos 101: How to get started at 12:12
Ragnar Schierholz on Sonos 101: How to get started at 12:09
Volker Weber on Signal strength on iPhone in dBm with *3001#12345#* at 11:36
Brian O'Gorman on iOS 4.1 available at 11:19
Chris frei on Sonos 101: How to get started at 11:15
Volker Weber on Sonos 101: How to get started at 10:49
Volker Weber on Sonos 101: How to get started at 10:38
Helmut Weiss on Sonos 101: How to get started at 10:35
John Lindsay on Sonos 101: How to get started at 10:29
Robert Dahlem on This product design reminds me of ... at 10:25
Sean Cull on New Amazon EC2 Micro Instances for 2 cents an hour at 10:14
Volker Weber on iOS 4.1 available at 10:07
Felix Binsack on iOS 4.1 available at 10:04
Frank Quednau on This product design reminds me of ... at 09:54
Alexander Kluge on Signal strength on iPhone in dBm with *3001#12345#* at 09:48
Manfred Wiktorin on This product design reminds me of ... at 09:13
Ragnar Schierholz on Sonos 101: How to get started at 07:21
Volker Weber on Sonos 101: How to get started at 01:48
Volker Weber on Sonos 101: How to get started at 01:35
Armin Roth on Sonos 101: How to get started at 01:34
Armin Roth on Sonos 101: How to get started at 01:32
Declan lynch on This product design reminds me of ... at 01:22

Ceci n'est pas un blog

vowe.net is a personal website published by Volker Weber a.k.a. vowe. I am an author, consultant and systems architect based in Darmstadt, Germany.

rss Click here to subscribe

Hello

About me
Contact
Publications
Certificates
Frequently asked questions
Join the network

Twitter Updates

More >

Local time is 13:41

visitors.gif
175 visitors online

News

Other sources of news, imported into my own format to make them more accessible:

Schlagzeilen
Weather

Archives

As most of my articles roll off the front page rather quickly, I am making an archive of previous posts available here. You can also use the handy search box at the top of the page if you are looking for something particular.

Last 30 days
More archives

Got the T-shirt?

Got the T-shirt?

Systems Architecture

This site runs on an Apache web server on top of the Linux operating system. The content is managed with MovableType which is implemented in Perl. Last but not least the HTML code your browser sees is put together with PHP.

© 1992-2010 Volker Weber.
All Rights Reserved.

Impressum