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

From: Benjamin Nowack <bnowack@appmosphere.com>
Date: Mon, 3 Oct 2005 17:49:53 +0200
To: "Miles, AJ \(Alistair\)" <A.J.Miles@rl.ac.uk>
Cc: semantic-web@w3.org, public-esw-thes@w3.org, public-swbp-wg@w3.org
Message-ID: <PM-EH.20051003174953.AFAEF.1.1D@192.168.27.2>


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 15:50:50 GMT

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