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RE: [VM] content-dependent redirects in apache ... help!

From: Miles, AJ \(Alistair\) <A.J.Miles@rl.ac.uk>
Date: Mon, 3 Oct 2005 17:28:38 +0100
Message-ID: <677CE4DD24B12C4B9FA138534E29FB1D0ACD8B@exchange11.fed.cclrc.ac.uk>
To: "Benjamin Nowack" <bnowack@appmosphere.com>
Cc: <semantic-web@w3.org>, <public-esw-thes@w3.org>, <public-swbp-wg@w3.org>

Hi Benjamin,

Thanks for this hint, I've got it working now.

I added a couple of lines to the .htaccess file, so it has:
---
Options -MultiViews
RewriteRule ^bar$ bar.var
RewriteRule ^core-latest-rdf$ /2004/02/skos/core/history/2005-03-31 [R=303]
RewriteRule ^core-latest-html$ /TR/2005/WD-swbp-skos-core-spec-20050510 [R=303]
---

Now http://www.w3.org/2004/02/skos/bar behaves as desired.

Cheers,

Al.

> -----Original Message-----
> From: Benjamin Nowack [mailto:bnowack@appmosphere.com]
> Sent: 03 October 2005 16:50
> To: Miles, AJ (Alistair)
> Cc: semantic-web@w3.org; public-esw-thes@w3.org; public-swbp-wg@w3.org
> Subject: Re: [VM] content-dependent redirects in apache ... help!
> 
> 
> 
> Hi Alistair,
> 
> just guessing, but do you have Multiviews enabled?
> 
> cheers,
> benjamin
> 
> --
> Benjamin Nowack
> 
> Kruppstr. 100
> 45145 Essen, Germany
> http://www.bnode.org/
> 
> On 03.10.2005 16:20:16, Miles, AJ \(Alistair\) wrote:
> >
> >Hi all,
> >
> >A short while ago I posted a proposed URI dereferencing 
> policy & setup for
> >SKOS Core [1] as a possible candidate for future best 
> practice wrt 'hash' RDF
> >namespaces.  To sum up what it does: basically, if the 
> client asks for html,
> >it gets redirect to the latest version of the html 
> documentation, and if the
> >client asks for rdf, it gets redirected to the latest 
> version of the rdf
> >description.  This was to satisfy two requirements:
> >
> >(Requirement 1) property & class URIs are 'clickable' in web 
> browsers and take
> >you to human readable stuff.
> >
> >(Requirement 2) provenance of any rdf statements about 
> classes/props is always
> >a date-stamped version of the 'ontology', allowing 
> determination of which
> >'version' is being used by an application at run-time.
> >
> >I've tried to implement this setup as a test on the W3C 
> server, but have run
> >into a problem and so am posting this in the hope that those 
> who know apache
> >better than me can tell me what's going on (i.e. help! :)
> >
> >I've got the following setup:
> >
> >In the directory /2004/02/skos/ there is a file 'bar.var' 
> which looks like ...
> >---
> >URI: bar
> >
> >URI: core-latest-rdf
> >Content-type: application/rdf+xml
> >
> >URI: core-latest-html
> >Content-type: text/html
> >
> >URI: core-latest-html
> >Content-type: text/xml
> >
> >URI: core-latest-html
> >Content-type: application/xml
> >
> >URI: core-latest-html
> >Content-type: application/xhtml+xml
> >---
> >
> >I added the following lines to .htaccess in /2004/02/skos/ ...
> >---
> >RewriteRule ^core-latest-rdf$ 
> /2004/02/skos/core/history/2005-03-31 [R=303]
> >RewriteRule ^core-latest-html$ 
> /TR/2005/WD-swbp-skos-core-spec-20050510 [R=303]
> >---
> >
> >(So the idea was to test if I could make the URI
> >http://www.w3.org/2004/02/skos/bar behave how we ultimately 
> want the URI
> >http://www.w3.org/2004/02/skos/core to behave).
> >
> >Now, if I try to GET http://www.w3.org/2004/02/skos/bar.var 
> everything behaves
> >as I would like, with a redirect to different resources 
> dependent on the
> >'Accept:' header in the original request.
> >
> >However, if I try to GET http://www.w3.org/2004/02/skos/bar 
> I get a 404 not
> >found.  It's obviously getting to the type-map file, because 
> of the header
> >returned by the server (see below, the 'Content-Location:' 
> field), but for
> >some reason is not doing the subsequent redirect.
> >
> >Here's the HTTP trace, anyone know what's going on? ...
> >---
> >http://www.w3.org/2004/02/skos/bar
> >
> >GET /2004/02/skos/bar HTTP/1.1
> >Host: www.w3.org
> >User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; 
> rv:1.7.11)
> >Gecko/20050728
> >Accept:
> >text/xml,application/xml,application/xhtml+xml,text/html;q=0.
> 9,text/plain;q=0.8
> >,image/png,*/*;q=0.5
> >Accept-Language: en-us,en;q=0.5
> >Accept-Encoding: gzip,deflate
> >Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> >Keep-Alive: 300
> >Proxy-Connection: keep-alive
> >
> >HTTP/1.x 404 Not Found
> >Date: Mon, 03 Oct 2005 15:10:16 GMT
> >Server: Apache/1.3.33 (Unix) PHP/4.3.10
> >Content-Location: core-latest-html
> >Vary: negotiate,accept
> >TCN: choice
> >P3P: policyref="http://www.w3.org/2001/05/P3P/p3p.xml"
> >Last-Modified: Mon, 05 Sep 2005 07:47:53 GMT
> >Etag: "431bf829;43414560"
> >Accept-Ranges: bytes
> >Content-Length: 2006
> >Content-Type: text/html; charset=iso-8859-1
> >X-Cache: MISS from wwwcache.rl.ac.uk
> >Proxy-Connection: close
> >----------------------------------------------------------
> >http://www.w3.org/2004/02/skos/bar
> >
> >GET /2004/02/skos/bar HTTP/1.1
> >Host: www.w3.org
> >User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; 
> rv:1.7.11)
> >Gecko/20050728
> >Accept: application/rdf+xml
> >Accept-Encoding: gzip,deflate
> >Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> >Keep-Alive: 300
> >Proxy-Connection: keep-alive
> >
> >HTTP/1.x 404 Not Found
> >Date: Mon, 03 Oct 2005 15:15:13 GMT
> >Server: Apache/1.3.33 (Unix) PHP/4.3.10
> >Content-Location: core-latest-rdf
> >Vary: negotiate,accept
> >TCN: choice
> >P3P: policyref="http://www.w3.org/2001/05/P3P/p3p.xml"
> >Last-Modified: Mon, 05 Sep 2005 07:47:53 GMT
> >Etag: "431bf829;43414560"
> >Accept-Ranges: bytes
> >Content-Length: 2006
> >Content-Type: text/html; charset=iso-8859-1
> >X-Cache: MISS from wwwcache.rl.ac.uk
> >Proxy-Connection: close
> >----------------------------------------------------------
> >http://www.w3.org/2004/02/skos/bar.var
> >
> >GET /2004/02/skos/bar.var HTTP/1.1
> >Host: www.w3.org
> >User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; 
> rv:1.7.11)
> >Gecko/20050728
> >Accept:
> >text/xml,application/xml,application/xhtml+xml,text/html;q=0.
> 9,text/plain;q=0.8
> >,image/png,*/*;q=0.5
> >Accept-Language: en-us,en;q=0.5
> >Accept-Encoding: gzip,deflate
> >Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> >Keep-Alive: 300
> >Proxy-Connection: keep-alive
> >
> >HTTP/1.x 303 See Other
> >Date: Mon, 03 Oct 2005 15:15:50 GMT
> >Server: Apache/1.3.33 (Unix) PHP/4.3.10
> >Content-Location: core-latest-html
> >Vary: negotiate,accept
> >TCN: choice
> >Location: http://www.w3.org/TR/2005/WD-swbp-skos-core-spec-20050510
> >Content-Type: text/html; charset=iso-8859-1
> >X-Cache: MISS from wwwcache.rl.ac.uk
> >Proxy-Connection: close
> >----------------------------------------------------------
> >http://www.w3.org/2004/02/skos/bar.var
> >
> >GET /2004/02/skos/bar.var HTTP/1.1
> >Host: www.w3.org
> >User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; 
> rv:1.7.11)
> >Gecko/20050728
> >Accept: application/rdf+xml
> >Accept-Encoding: gzip,deflate
> >Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> >Keep-Alive: 300
> >Proxy-Connection: keep-alive
> >
> >HTTP/1.x 303 See Other
> >Date: Mon, 03 Oct 2005 15:15:43 GMT
> >Server: Apache/1.3.33 (Unix) PHP/4.3.10
> >Content-Location: core-latest-rdf
> >Vary: negotiate,accept
> >TCN: choice
> >Location: http://www.w3.org/2004/02/skos/core/history/2005-03-31
> >Content-Type: text/html; charset=iso-8859-1
> >X-Cache: MISS from wwwcache.rl.ac.uk
> >Proxy-Connection: close
> >---
> >
> >Cheers,
> >
> >Al.
> >
> >[1] 
http://lists.w3.org/Archives/Public/public-esw-thes/2005Sep/0008.html
>
>---
>Alistair Miles
>Research Associate
>CCLRC - Rutherford Appleton Laboratory
>Building R1 Room 1.60
>Fermi Avenue
>Chilton
>Didcot
>Oxfordshire OX11 0QX
>United Kingdom
>Email:        a.j.miles@rl.ac.uk
>Tel: +44 (0)1235 445440
>
>
>
>
Received on Monday, 3 October 2005 16:28:49 GMT

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