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Re: error...

From: Olivier Thereaux <ot@w3.org>
Date: Tue, 16 Sep 2003 13:52:32 +0900
Cc: <www-validator@w3.org>
To: "Harry R. Murphy" <harryrmurphy@hotmail.com>
Message-Id: <952A032C-E801-11D7-ADCF-000393A63FC8@w3.org>

Hello Harry,

On Tuesday, Sep 16, 2003, at 06:17 Asia/Tokyo, Harry R. Murphy wrote:

> My page validates for W3C XTHML, so I place the valid xhtml image and 
> corresponding uri on my page as seen below:
> On clicking the image I was redirected to the following url:
> http://validator.w3.org/check?uri=

As you have seen, /check/referer/ is using a redirect mechanism. This 
mechanism uses a "refeRrer" header sent by your browser or other user 
agents to know which page the request comes from. Unfortunately, some 
"security software" (personal firewalls, your ISP's proxy, etc) remove 
this header from your queries when filtering your network traffic, 
leaving the Markup Validator without this important piece of 

The bad news is that we can't do anything to help you, except suggest 
that you could replace "/check/referer/"with 
"/check?uri=http://your/web/page" or try to investigate which software 
is responsible for removing the HTTP Referer header. The good news is 
that this problem is only (well, mostly, as other people may experience 
it too) on your client's side and other people clicking on the icon you 
added to your page will actually see the proper validation results.

Received on Tuesday, 16 September 2003 00:52:31 UTC

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