Code snippet of a JAX-RS container filter validating a JWT token

JAXRS-JWT-Request-Filter.txt

@Priority(Priorities.AUTHENTICATION)
public class JWTAuthFilter implements ContainerRequestFilter{
  @Override
  public void filter(ContainerRequestContext requestContext) throws IOException {
        String authHeaderVal = requestContext.getHeaderString("Authorization");
        
            //consume JWT i.e. execute signature validation
            if(authHeaderVal.startsWith("Bearer")){
            try {
                validate(authHeaderVal.split(" ")[1]);
            } catch (InvalidJwtException ex) {
                requestContext.abortWith(Response.status(Response.Status.UNAUTHORIZED).build());
            }
            }else{
                requestContext.abortWith(Response.status(Response.Status.UNAUTHORIZED).build());
            }
  }