[JENA-2133] Jena sends multiple media types in accept header when reading knowledge via a url

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 4.1.0
• Fix Version/s: Jena 4.2.0
• Component/s: RIOT

Environment

Windows / WSL2 / Maven / Java 14.0.2

Language

Java

• Assignee: Unassigned
• Reporter: Rem Collier
• Created: 13/Jul/21 19:24
• Updated: 14/Jul/21 11:21
• Resolved: 14/Jul/21 11:21

Description

When I create a basic model and use the read(...) method to read a remote file, Jena includes multiple media types in the request header.

 

Accept: text/turtle,application/n-triples;q=0.9,application/rdf+xml;q=0.7,application/trig,application/n-quads;q=0.9,application/ld+json;q=0.8,*/*;q=0.5

The ordering and priorities of the media types does not change, even when different formats are chosen.

i.e. the following code gives the above list of media types:

 

 

Model model = ModelFactory.createDefaultModel();
model.read("http://localhost:8080/sim", "TURTLE");   

However, the code below also gives the same list of media types:
 

Model model = ModelFactory.createDefaultModel(); model.read("http://localhost:8080/sim", "RDF/XML");

 
This results in the knowledge being downloaded in the incorrect format...