W3C home > Mailing lists > Public > public-bpwg@w3.org > August 2009

Re: Validator

From: Francois Daoust <fd@w3.org>
Date: Mon, 31 Aug 2009 09:28:48 +0200
Message-ID: <4A9B7BB0.4040903@w3.org>
To: Gavin Landon <gavin.landon@gmail.com>
CC: Public MWBP <public-bpwg@w3.org>
Argh. Yes, that is unclear, isn't it?

Your page links to the W3C CSS validation service.
The mobileOK Checker makes sure all links in a page target an existing 
page, because clicking on a broken link negatively affects user 
experience on mobile devices (more than on desktop browsers). It reports 
failures.

But... to prevent looping, the CSS validation service is configured to 
return an HTTP error when the request originates from another W3C server 
(here, the mobileOK Checker). The mobileOK Checker thus receives an 
error when it checks the link to the CSS validator, and reports it. Yes, 
the mobileOK Checker is pretty dumb. It should know about a few 
exceptions such as this one.

Francois.


Gavin Landon wrote:
> BTW, one of the errors that showed up as my issue, I started looking 
> deeper into actually points at a CSS on your domain.
>  
> http://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fvalidator.w3.org%2Fmobile%2Fcheck%3Ftask%3D20090827195137277%26docAddr%3Dhttp%253A%252F%252Fmobile.dp.bz%252F
>  
> So, your validator is validating your site as well as mine, instead of 
> just mine?
> 
> On Thu, Aug 27, 2009 at 1:54 PM, Gavin Landon <gavin.landon@gmail.com 
> <mailto:gavin.landon@gmail.com>> wrote:
> 
>     On Thu, Aug 27, 2009 at 12:47 PM, Francois Daoust <fd@w3.org
>     <mailto:fd@w3.org>> wrote:
>      >style.asp is served with a "text/html" content-type. I suspect your
>      >server is configured to map ".asp" files to "text/html" and ".css"
>      >files to "text/css". You can check that yourself with a browser
>      >extension such as Firebug for Firefox or with a network packet
>      >sniffer such as Wireshark.
>      >
>      >All desktop browsers and most mobile browsers probably ignore
>      >the content-type because they expect CSS and will try to parse
>      >the file as CSS anyway. That would still be better to set CSS
>      >content-type as "text/css".
> 
>     This may be true, since I'm using a hosting service, which I have no
>     control over how they configure their IIS Server.
> 
> 
>      >The mobileOK Checker fails to identify the doctype because it is
>     invalid.
>      >It is invalid because you are using a "PUBLIC" doctype, and in
>     that case,
>      >a system identifier must follow the public identifier, as defined
>     in the
>      >XML spec:
>      > http://www.w3.org/TR/xml/#NT-ExternalID
>      >
>      >The error in the doctype is returned by the mobileOK Checker as a
>     not-so-clear
>      >markup validation error: "White spaces are required between
>     publicId and
>      >systemId". Not finding a valid DOCTYPE, the mobileOK Checker also
>     triggers
>      >the "no doctype found" error, which is a bit awkward, I must say.
>      >
>      >Two things are worth noting here:
>      >1. I do not know at this point why the markup validation service
>     does not
>      >complain about your doctype declaration. It may be that such doctype
>      >declarations are possible in HTML 4.01, but I couldn't find any
>      >information in the relevant section of the HTML 4.01 spec:
>      > http://www.w3.org/TR/html4/struct/global.html#h-7.2
>      >I need to investigate.
>      >
>      >2. It is extremely hard to report error messages as they should be
>      >reported so that a human being can understand them :( 
>      
>     It doesn't like PUBLIC?  I went to google.com/m
>     <http://google.com/m> to see how they use it, and they are using
>     public.  I copied their line and pasted it in place of mine and I
>     think it breaks MobileOK.  The results ani-image is moving, but it
>     never goes to the next page.  I removed the DOCTYPE and it works,
>     added it back and it freezes again.   Google uses:
>     <!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
>     "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
>     <http://www.wapforum.org/DTD/xhtml-mobile10.dtd%22%3E>
>     Now, this completely messes my site up, so I removed it again.
>     I thought I understood the meaning of doctype, but I must be missing
>     something, even still.
> 
>      
>      >Neither the HTML page nor the CSS page contain any character encoding
>      >declaration. This means browsers need to "sniff and guess" the
>     encoding.
>      >Most of the time, they will just get it right, in particular when
>      >documents are written in English because they won't contain any
>      >"weird" character.
>     Ok, after that being said along with the information mentioned
>     above, I'm noticing that MobileOK is looking at more of what the
>     server says, rather than the code within the page says.  I'm not so
>     sure this is a good idea or why we have HTML tags that are ignored,
>     since most people like myself use a hosting provider and have no
>     control over how the server is configured.  That being said, I added
>     a Header of ContentType within my server side code and it cleared up
>     some of the errors.   I did this for all my pages as well as the
>     style sheet.
>      
>     Note: MobileOK, has the message of:
>     The document is not served as "application/xhtml+xml"
>      
>     No where do I specify it is, so why would it be looking for ASP
>     pages to be served as an application?   If I set my pages to this,
>     it prompts to download the page instead of displaying them.
> 
>      
>      >Any text file transmitted on the network should define its encoding,
>      >be it a CSS file or an HTML document. Probably something like 99.99%
>      >of all styles written in CSS files use regular ASCII characters that
>      >happen to be encoded the same way in most encodings, so that's not
>      >such a big deal as far as CSS is concerned.
>      
>      >The CSS specification explains that other encodings may be used
>     when necessary:
>      > http://www.w3.org/TR/CSS21/syndata.html#escaping
> 
>     I got another error, before MobileOK stopped working all together
>     for me.
> 
> 
> 
> 
> -- 
> Gavin
Received on Monday, 31 August 2009 07:29:27 UTC

This archive was generated by hypermail 2.4.0 : Friday, 25 March 2022 10:09:54 UTC