http://www.dropwizard.io/2.0.18/dropwizard-bom/dropwizard-dependencies/dropwizard-parent/dropwizard-auth: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.auth;

import io.dropwizard.jersey.errors.ErrorMessage;

import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

public class JSONUnauthorizedHandler implements UnauthorizedHandler {
    private static final String CHALLENGE_FORMAT = "%s realm=\"%s\"";

    @Override
    public Response buildResponse(String prefix, String realm) {
        ErrorMessage errorMessage = new ErrorMessage(
            Response.Status.UNAUTHORIZED.getStatusCode(),
            "Credentials are required to access this resource."
        );
        return Response.status(errorMessage.getCode())
            .header(HttpHeaders.WWW_AUTHENTICATE, String.format(CHALLENGE_FORMAT, prefix, realm))
            .type(MediaType.APPLICATION_JSON_TYPE)
            .entity(errorMessage)
            .build();
    }
}