4.2. 認証例外レンスポンスをカスタマイズする

package io.quarkus.it.keycloak;

import jakarta.annotation.Priority;
import jakarta.ws.rs.Priorities;
import jakarta.ws.rs.core.Context;
import jakarta.ws.rs.core.Response;
import jakarta.ws.rs.core.UriInfo;
import jakarta.ws.rs.ext.ExceptionMapper;
import jakarta.ws.rs.ext.Provider;

import io.quarkus.security.AuthenticationFailedException;

@Provider
@Priority(Priorities.AUTHENTICATION)
public class AuthenticationFailedExceptionMapper implements ExceptionMapper<AuthenticationFailedException> {

    @Context
    UriInfo uriInfo;

    @Override
    public Response toResponse(AuthenticationFailedException exception) {
        return Response.status(401).header("WWW-Authenticate", "Basic realm=\"Quarkus\"").build();
    }
}

package io.quarkus.it.keycloak;

import jakarta.enterprise.context.ApplicationScoped;
import jakarta.enterprise.event.Observes;

import io.quarkus.security.AuthenticationFailedException;
import io.vertx.core.Handler;
import io.vertx.ext.web.Router;
import io.vertx.ext.web.RoutingContext;

@ApplicationScoped
public class AuthenticationFailedExceptionHandler {

    public void init(@Observes Router router) {
        router.route().failureHandler(new Handler<RoutingContext>() {
            @Override
            public void handle(RoutingContext event) {
                if (event.failure() instanceof AuthenticationFailedException) {
                    event.response().end("CUSTOMIZED_RESPONSE");
                } else {
                    event.next();
                }
            }
        });
    }
}