@GET
  @Path("/{civica_id}")
  @Produces(MediaType.APPLICATION_JSON)
  @Transactional
  public Response getUser(@PathParam("civica_id") String civica_id) throws MyException {

    Civica civica = new Civica();
    civica = civicaDAO.leer(civica_id);
    return Response.ok() // 200
        .entity(civica)
        .header("Access-Control-Allow-Origin", "*")
        .header("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT")
        .build();
  }