How do I get the requests HttpHeaders in a CDI bean in Quarkus?

Question

I would like to get the AcceptableLanguage header of the originating request to select the correct translation language.

I thought that this would work:

import javax.ws.rs.core.HttpHeaders;

@ApplicationScoped
public class TranslationService{

   @Context HttpHeaders httpHeaders;
....
}

As it seems, I always result in a null value. When I try the @Context field directly in a RestEasy controller, the field is assigned with the current HttpHeaders object.

I already have tried to save the http headers inside a ContrainerRequestFilter to a @RequestScoped bean, althought the value seems to get lost again until the use in my TranslationService.

How can I, in quarkus, get or provide the requests http headers, so any bean can access them?

`@Context` injection only works in JAX-RS resources. So that won't ever work. Your attempt to store headers to a `@RequestScoped` bean inside a `ContainerRequestFilter` and injecting that bean should work, though. Maybe add that code so someone can figure out what's wrong with it. — Ladicek, Sep 09 '22 at 15:31

score 2 · Accepted Answer · answered Sep 12 '22 at 08:34

It actually did work with a ContainerRequestFilter

I added the following filter

@Provider
@PreMatching
public class UserInfoProvider implements ContainerRequestFilter {

    private final UserInfo userinfo;

    @Inject
    public UserInfoProvider(UserInfo userinfo) {
        this.userinfo = userinfo;
    }

    @Override
    public void filter(ContainerRequestContext requestContext) {
        List<Locale> acceptableLanguages = requestContext.getAcceptableLanguages();
        userinfo.setAcceptableLanguages(acceptableLanguages);
    }
}

of which the bean UserInfo is @RequestScoped

How do I get the requests HttpHeaders in a CDI bean in Quarkus?

1 Answers1