[K8s] Sparql endpoint to support CORS headers

[ioggstream]

Description

• I expect https://www.schema.gov.it/sparql to return CORS headers so that I can embed sparql results in external SPA

Reproduce

1. execute

curl  https://www.schema.gov.it/sparql -ki -H accept:text/turtle | grep -i Access-Control-Allow-Origin

I expect

The ouput to include

Access-Control-Allow-Origin: *

Instead

None

Note

The output is

HTTP/1.1 200 OK
server: Virtuoso/07.20.3233 (Linux) x86_64-pc-linux-gnu
date: Tue, 06 Sep 2022 09:50:24 GMT
accept-ranges: bytes
content-disposition: filename=sparql_2022-09-06_09-50-24Z.ttl
content-type: text/turtle; charset=UTF-8
content-length: 572
set-cookie: 1936a7f4250efc65a475b6eae6a9a1b5=6ca3d1eae9bf0e6c1896b20bb0561c02; path=/; HttpOnly; Secure; SameSite=None
cache-control: private

@prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ns1:    <http://localhost:8890/> .
@prefix sd:     <http://www.w3.org/ns/sparql-service-description#> .
ns1:sparql      rdf:type        sd:Service ;
        sd:endpoint     ns1:sparql ;
        sd:feature      sd:UnionDefaultGraph ,
                sd:DereferencesURIs .
@prefix ns3:    <http://www.w3.org/ns/formats/> .
ns1:sparql      sd:resultFormat ns3:RDF_XML ,
                ns3:SPARQL_Results_CSV ,
                ns3:SPARQL_Results_JSON ,
                ns3:SPARQL_Results_XML ,
                ns3:RDFa ,
                ns3:N-Triples ,
                ns3:N3 ,
                ns3:Turtle ;
        sd:supportedLanguage    sd:SPARQL10Query ;
        sd:url  ns1:sparql .