GET Request with Content-Type and Accept header with JAX-RS Jersey 2.2

Question

I try to access an open data web service which gives me traffic infos. Documentation says that requests have to be GET and need to contain Accept: applica

Answer 1

You can use the ContainerResponseFilter to set the default Accept header if it is not provided in the input request.

@Provider
public class EntityResponseFilter implements ContainerResponseFilter {

    private MediaType getExternalMediaType(){
        MediaType mediaType = new MediaType("application", "vnd.xxx.resource+json")
        return mediaType; 
    }

    @Override
    public void filter( ContainerRequestContext reqc , ContainerResponseContext resc ) throws IOException {
        MediaType mediaType = getExternalMediaType(); 
        List mediaTypes = reqc.getAcceptableMediaTypes();
        if( mediaTypes.contains(mediaType) ) {   
            resc.setEntity( resc.getEntity(), new Annotation[0], mediaType );
        }
        // ...
    }
}