Hello there,
I have set up a Virtuoso server with DBpedia data and URI dereferencing
(dbpedia VAD).
I have introduced alternative URIs for DBpedia resources like for dbpedialite.
The new URIs have a different namespace and they are related to DBpedia entries
by owl:sameAs relations.
For instance
<http://fr.dbpedia.org/resourceById/1544866> owl:sameAs
<http://fr.dbpedia.org/resource/Charles_Darwin>
I would like to make the new URIs dereferencable with a simple http 302
redirect towards the corresponding DBpedia resource.
Is there a simlpe way to take into account RDF data to define http redirects in
Virtuoso.
I tried to define a vsp page to which I will redirect the virtual directory
'/resourceById' :
<blockquote>
<?vsp
declare _resource_, _resource_uri_, meta, data any;
_resource_ := get_keyword ('res', params, '');
_resource_uri_ := registry_get('dbp_domain') || _resource_;
exec (sprintf ('sparql '||
'select ?o where { <%S> owl:sameAs ?o }', _resource_uri_), null, null, vector
(), 0, meta, data);
if (length (data))
{
http_request_status ('HTTP/1.1 302 Found');
http_header ('Location: '|| data[0][0] ||'\r\nAccept: application/rdf+xml,
text/html\r\n');
}
else{
http_request_status ('HTTP/1.1 404 Not found');
}
?>
</blockquote>
But I get stuck with content negotiation, "Content-Type: text/html;
charset=UTF-8" is added to the header and thus I get a http 406 error when I
ask for another content type like "application/rdf+xml" .
Is there be a nicer way to do this ?
Thanks for any help,
Julien
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