Spring Keycloak：获取用户标识

Question

我已经开发了一个Spring Boot Web服务，并使用Keycloak进行访问管理。该网站将一些用户数据存储在数据库中。我尝试将这些数据与登录的用户连接。

目前，我将用户名和数据一起存储。但是我喜欢存储用户ID而不是用户名。我怎样才能做到这一点？

我尝试通过此方法获取SecurityContext：

@Bean
@Scope(scopeName = WebApplicationContext.SCOPE_REQUEST, proxyMode = ScopedProxyMode.TARGET_CLASS)
public KeycloakSecurityContext getKeycloakSecurityContext() {
    return ((KeycloakPrincipal<KeycloakSecurityContext>) getRequest().getUserPrincipal()).getKeycloakSecurityContext();
}

但是我得到一个错误：

There was an unexpected error (type=Internal Server Error, status=500).
Error creating bean with name 'scopedTarget.getKeycloakSecurityContext'
defined in com.SiteApplication: Bean instantiation via factory method
failed; nested exception is
org.springframework.beans.BeanInstantiationException: Failed to
instantiate [org.keycloak.KeycloakSecurityContext]: Factory method
'getKeycloakSecurityContext' threw exception; nested exception is
java.lang.ClassCastException:
org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken
cannot be cast to org.keycloak.KeycloakPrincipal

这是正确的方法吗？缺什么？

谢谢！

Answer 1

我在我们的代码中做了类似的事情。

public class AuthenticationTokenProcessingFilter extends GenericFilterBean {

        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

            if (!(request instanceof HttpServletRequest)) {
                throw new RuntimeException("Expecting a HTTP request");
            }

            RefreshableKeycloakSecurityContext context = (RefreshableKeycloakSecurityContext) request.getAttribute(KeycloakSecurityContext.class.getName());

            if (context == null) {
                handleNoSecurityContext(request, response, chain);
                return;
            }

            AccessToken accessToken = context.getToken();
            Integer userId = Integer.parseInt(accessToken.getOtherClaims().get("user_id").toString());

            chain.doFilter(request, response);
        }

}

在您执行此操作之前，您必须将user_id加到由 keycloak 发布的访问令牌中。您可以通过映射器执行此操作，如下面的屏幕截图所示。

另外，不要忘记通过向@Bean应用程序类添加方法来将处理过滤器从上面添加到应用程序生命周期中。

@Configuration
@EnableAutoConfiguration(exclude = {FallbackWebSecurityAutoConfiguration.class, SpringBootWebSecurityConfiguration.class, DataSourceAutoConfiguration.class})
@ComponentScan
@EnableAsync
public class MyServiceClass {

    public static void main(String[] args) {
        Properties properties = new Properties();
        new SpringApplicationBuilder(MyServiceClass.class)
                .properties(properties)
                .bannerMode(Banner.Mode.OFF)
                .run(args);
    }


    @Bean
    public AuthenticationTokenProcessingFilter authFilter() {
        return new AuthenticationTokenProcessingFilter();
    }

}

Answer 2

我发现了一个比上述简单得多的解决方案：

    @GetMapping
    public ResponseEntity getEndpoint(String someParam, HttpServletRequest request) {
        KeycloakAuthenticationToken principal = (KeycloakAuthenticationToken) request.getUserPrincipal();
        String userId = principal.getAccount().getKeycloakSecurityContext().getIdToken().getSubject();

        //....do something

        return new ResponseEntity(HttpStatus.OK);
    }

我认为您遇到的异常是因为您试图在类型为时强制getRequest().getUserPrincipal()转换KeycloakPrincipal<KeycloakSecurityContext>为KeycloakAuthenticationToken，所以((KeycloakAuthenticationToken) getRequest().getUserPrincipal())可以工作。