W3C home > Mailing lists > Public > www-validator@w3.org > October 2004

Bug in W3 Validator File Upload

From: Peter Firminger <peterf@webboy.net>
Date: Tue, 12 Oct 2004 12:07:35 +1000
To: <www-validator@w3.org>
Message-ID: <E1CHC5X-0000kn-Fr@frink.w3.org>


One of the WSG members has asked a question off list and he is quite correct.

When uploading a file for validation from http://validator.w3.org/ or 
http://validator.w3.org/file-upload.html we get the message:

Sorry, I am unable to validate this document because its content type is 
text/plain, which is not currently supported by this service.

The Content-Type field is sent by your web server (or web browser if you use 
the file upload interface) and depends on its configuration. Commonly, web 
servers will have a mapping of filename extensions (such as ".html") to MIME 
Content-Type values (such as text/html).

That you recieved this message can mean that your server is not configured 
correctly, that your file does not have the correct filename extension, or 
that you are attempting to validate a file type that we do not support yet. In 
the latter case you should let us know that you need us to support that 
content type (please include all relevant details, including the URL to the 
standards document defining the content type) using the instructions on the 
Feedback Page.

Heads up on the typo in "received" as well (I before E except after C).

The pages we have tried are XHTML 1.0 (Transitional and Strict) and HTML 4.01 
Transitional and have the file extensions .htm or .html (have tried various 

Should the validator not assume text/html instead of text/plain for an 
uploaded file? It is a mark-up validator after all so why not default to the 
most likely mime type?

Now... Having tried a few things...

I was using WinXP/IE 6 to do this (as most people do - EYODF) and surprise, 
surprise it works in FireBug 1.0PR.

How are we to get the mainstream developers to do this if we lock the majority 
of them out of it with a very unhelpful error message? Or is it just a bug 
that you can rectify quickly? I'm more than a little concerned by this as it 
looks like browser favouritism (towards the boutique end) to me.


Peter Firminger


1300 666 770 (au only)
+612 4998 3388
Received on Tuesday, 12 October 2004 02:11:20 UTC

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