Aklakan opened a new issue, #2233:
URL: https://github.com/apache/jena/issues/2233
### Version
5.0.0-SNAPSHOT
### What happened?
Setting headers explicitly using e.g.
`.acceptHeaderSelectQuery(WebContent.contentTypeResultsXML)` does not work
consistently across the APIs.
Only `RDFConnection.query(queryObject)` works as expected.
* For query *strings*, internally the query type is always considered
QueryType.UNKNOWN and the custom header is ignored - even if query parsing is
enabled (it is by default):
https://github.com/apache/jena/blob/0fd96b64e1f404477eb8f95cefa49c776d907c27/jena-rdfconnection/src/main/java/org/apache/jena/rdflink/RDFLinkHTTP.java#L256
* For query *objects*, using `RDFConnection.newQuery()` does not forward the
header:
See
https://github.com/apache/jena/blob/0fd96b64e1f404477eb8f95cefa49c776d907c27/jena-rdfconnection/src/main/java/org/apache/jena/rdflink/RDFLinkHTTP.java#L268
```java
class Test {
public static void main(String[] args) {
JenaSystem.init();
try (RDFConnection conn = RDFConnectionRemote.newBuilder()
.queryEndpoint("https://dbpedia.org/sparql";)
.acceptHeaderSelectQuery(WebContent.contentTypeResultsXML)
.build()) {
String queryStr = "SELECT * { ?s <urn:bar> <urn:baz> }";
System.out.println("String - Direct");
// DEBUG org.apache.jena.http.HTTP: > GET
https://dbpedia.org/sparql?query=SELECT%20%2A%20%7B%20?s%20%3Curn:bar%3E%20%3Curn:baz%3E%20%7D
// DEBUG org.apache.jena.http.HTTP: Accept
application/sparql-results+json, application/sparql-results+xml;q=0.9,
text/tab-separated-values;q=0.7,
text/csv;q=0.5,application/json;q=0.2,application/xml;q=0.2,*/*;q=0.1
try (QueryExecution qe = conn.query(queryStr)) {
ResultSet rs = qe.execSelect().materialise();
System.out.println(ResultSetFormatter.asText(rs));
}
System.out.println("String - Builder");
// DEBUG org.apache.jena.http.HTTP: > GET
https://dbpedia.org/sparql?query=SELECT%20%2A%20%7B%20?s%20%3Curn:bar%3E%20%3Curn:baz%3E%20%7D
// DEBUG org.apache.jena.http.HTTP: Accept
application/sparql-results+json, application/sparql-results+xml;q=0.9,
text/tab-separated-values;q=0.7,
text/csv;q=0.5,application/json;q=0.2,application/xml;q=0.2,*/*;q=0.1
try (QueryExecution qe = conn.newQuery().query(queryStr).build()) {
ResultSet rs = qe.execSelect().materialise();
System.out.println(ResultSetFormatter.asText(rs));
}
Query query = QueryFactory.create(queryStr);
System.out.println("Query - Direct");
// DEBUG org.apache.jena.http.HTTP: > GET
https://dbpedia.org/sparql?query=SELECT%20%20%2A%0AWHERE%0A%20%20%7B%20?s%20%20%3Curn:bar%3E%20%20%3Curn:baz%3E%20%7D%0A
// DEBUG org.apache.jena.http.HTTP: Accept
application/sparql-results+xml
try (QueryExecution qe = conn.query(query)) {
ResultSet rs = qe.execSelect().materialise();
System.out.println(ResultSetFormatter.asText(rs));
}
System.out.println("Query - Builder");
// DEBUG org.apache.jena.http.HTTP: > GET
https://dbpedia.org/sparql?query=SELECT%20%20%2A%0AWHERE%0A%20%20%7B%20?s%20%20%3Curn:bar%3E%20%20%3Curn:baz%3E%20%7D%0A
// DEBUG org.apache.jena.http.HTTP: Accept
application/sparql-results+json, application/sparql-results+xml;q=0.9,
text/tab-separated-values;q=0.7,
text/csv;q=0.5,application/json;q=0.2,application/xml;q=0.2,*/*;q=0.1
try (QueryExecution qe = conn.newQuery().query(query).build()) {
ResultSet rs = qe.execSelect().materialise();
System.out.println(ResultSetFormatter.asText(rs));
}
}
}
}
```
### Relevant output and stacktrace
_No response_
### Are you interested in making a pull request?
Maybe
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