org.springframework.web.client.HttpClientErrorException$Unauthorized: 401 : [no body]

[fintans]

I am trying to run an integration test. When I add the Auth header, I get the above error. When I remove the auth header, the test passes. I have removed any authentication on my end points just so I can try get this working.

I have downgraded to sring-boot 2.4.4 as suggested in other discussion threads.

The jwt is being successfully created, but when I add it to auth headers, I get the 401 error

    @Test
    public void test_endpoint2() {
        KeycloakMock mock = new KeycloakMock(aServerConfig().withDefaultHostname("http://localhost").withPort(8000).withDefaultRealm("SpringBootKeycloak").build());

        mock.start();

        RestTemplate restTemplate1 = new RestTemplate();
        String token = mock.getAccessToken(aTokenConfig().build());

        String fullToken = "Bearer " + token;

        ClientHttpRequestInterceptor interceptor = (request, body, execution) -> {
            HttpHeaders headers = request.getHeaders();
            headers.set("Authorization", fullToken);
            headers.set("Content-Type", MediaType.APPLICATION_JSON_VALUE);
            headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);

            return execution.execute(request, body);
        };

        restTemplate1.setInterceptors(Arrays.asList(interceptor));
        String url = "http://localhost:" + port + "/api/test2";

        ResponseEntity<String> customerResponse = restTemplate1.getForEntity(url, String.class);
        assertThat(customerResponse.getStatusCode(), Matchers.is(HttpStatus.OK));
    }

Error logs:

2021-12-18 12:40:43.496  INFO 7640 --- [ntloop-thread-0] c.t.k.impl.handler.CommonHandler         : 200: GET /auth/realms/SpringBootKeycloak/.well-known/openid-configuration
2021-12-18 12:40:43.560  INFO 7640 --- [o-auto-1-exec-1] o.keycloak.adapters.KeycloakDeployment   : Loaded URLs from http://localhost:8000/auth/realms/SpringBootKeycloak/.well-known/openid-configuration
2021-12-18 12:40:43.612  INFO 7640 --- [ntloop-thread-0] c.t.k.impl.handler.CommonHandler         : 200: GET /auth/realms/SpringBootKeycloak/protocol/openid-connect/certs

org.springframework.web.client.HttpClientErrorException$Unauthorized: 401 : [no body]

applicaction.properties:

keycloak.auth-server-url=http://localhost:8000/auth
keycloak.realm=SpringBootKeycloak
keycloak.resource=login-app
keycloak.public-client=true
keycloak.bearer-only=true

I am not (yet) authenticating the above endpoint in security config

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        super.configure(http);
        http.authorizeRequests()
                .antMatchers("/api/hello")
                .hasRole("user").anyRequest().authenticated();
        http.csrf().disable();
    }

[ostrya]

As far as I can see, the issue is with the server configuration: you use withDefaultHostname("http://localhost"), but the hostname is not supposed to contain the protocol part. Please use withDefaultHostname("localhost") and see if it works.

[fintans]

This was the problem! Thank you so much.