我在用SimpUserRegistry获取在线用户数（使用getUserCount()）。它在我的本地计算机上运行良好，但在只有弹性 IP 且没有负载均衡器的 AWS EC2 实例（尝试使用 Amazon Linux 和 Ubuntu）上运行不佳。
EC2 上的问题是，某些用户在连接时从未添加到注册表中，因此我得到了错误的结果。
我有会话侦听器，用于SessionConnectedEvent and SessionDisconnectEvent，我使用的地方SimpUserRegistry（自动连接）以获取用户存在。如果有关系的话我也是SimpUserRegistry是一个消息传递控制器。
以下是 websocket 消息代理配置：
@Order(Ordered.HIGHEST_PRECEDENCE + 99)
@Configuration
@EnableWebSocketMessageBroker
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
public class WebSocketMessageBrokerConfig extends AbstractWebSocketMessageBrokerConfigurer {
@NonNull
private SecurityChannelInterceptor securityChannelInterceptor;
@Override
public void configureMessageBroker(MessageBrokerRegistry config) {
ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
threadPoolTaskScheduler.setPoolSize(1);
threadPoolTaskScheduler.setThreadGroupName("cb-heartbeat-");
threadPoolTaskScheduler.initialize();
config.enableSimpleBroker("/queue/", "/topic/")
.setTaskScheduler(threadPoolTaskScheduler)
.setHeartbeatValue(new long[] {1000, 1000});
config.setApplicationDestinationPrefixes("/app");
}
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/websocket")
.setAllowedOrigins("*")
.withSockJS();
}
@Override
public void configureClientInboundChannel(ChannelRegistration registration) {
registration.interceptors(securityChannelInterceptor);
}
}
下面是上面配置类中使用的通道拦截器：
@Slf4j
@Component
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
public class SecurityChannelInterceptor extends ChannelInterceptorAdapter {
@NonNull
private SecurityService securityService;
@Value("${app.auth.token.header}")
private String authTokenHeader;
@Override
public Message<?> preSend(Message<?> message, MessageChannel channel) {
StompHeaderAccessor accessor = MessageHeaderAccessor.getAccessor(message, StompHeaderAccessor.class);
StompCommand command = accessor.getCommand();
if (StompCommand.CONNECT.equals(command)) {
List<String> authTokenList = accessor.getNativeHeader(authTokenHeader);
if (authTokenList == null || authTokenList.isEmpty()) {
throw new AuthenticationFailureException("STOMP " + command + " missing " + this.authTokenHeader + " header!");
}
String accessToken = authTokenList.get(0);
AppAuth authentication = securityService.authenticate(accessToken);
log.info("STOMP {} authenticated. Authentication Token = {}", command, authentication);
accessor.setUser(authentication);
SecurityContextHolder.getContext().setAuthentication(authentication);
Principal principal = accessor.getUser();
if (principal == null) {
throw new RuntimeException("StompHeaderAccessor did not set the authenticated User for " + authentication);
}
}
return message;
}
}
我还有以下计划任务，它每两秒打印一次用户名：
@Component
@Slf4j
@AllArgsConstructor(onConstructor = @__(@Autowired))
public class UserRegistryLoggingTask {
private SimpUserRegistry simpUserRegistry;
@Scheduled(fixedRate = 2000)
public void logUsersInUserRegistry() {
Set<String> userNames = simpUserRegistry.getUsers().stream().map(u -> u.getName()).collect(Collectors.toSet());
log.info("UserRegistry has {} users with IDs {}", userNames.size(), userNames);
}
}
有些用户名即使连接后也不会显示。
实施SecurityService class -
@Service
@AllArgsConstructor(onConstructor = @__(@Autowired))
public class SecurityService {
private UserRepository userRepository;
private UserCredentialsRepository userCredentialsRepository;
private JwtHelper jwtHelper;
public User getUser() {
AppAuth auth = (AppAuth) SecurityContextHolder.getContext().getAuthentication();
User user = (User) auth.getUser();
return user;
}
public AppAuth authenticate(String accessToken) {
String username = jwtHelper.tryExtractSubject(accessToken);
if (username == null) {
throw new AuthenticationFailureException("Invalid access token!");
}
User user = userRepository.findByUsername(username);
if (user == null) {
throw new AuthenticationFailureException("Invalid access token!");
}
AppAuth authentication = new AppAuth(user);
return authentication;
}
}
Update
以下是 SockJS 在浏览器上登录的示例 -
来自服务器的正确响应user-name header:
>>> CONNECT
AccessToken:eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJkb2cifQ.Wf8AO77LluHEfEv61TIvugEXxOqIXKjsJBO8QMQh-rF7tzf56lBkdpOruqc7UPf_Pmj6-dnHZ5raq2MnMpeG8Q
accept-version:1.1,1.0
heart-beat:10000,10000
<<< CONNECTED
version:1.1
heart-beat:1000,1000
user-name:5a590e411b96f841cc00027f
来自服务器的错误响应没有user-name header:
>>> CONNECT
AccessToken:eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJtb3VzZSJ9.wqX5X_CSdHD8_7PZPiSzftGCuPz1ClQU0-F9RHCqOIIkMLzI4rt31_EAaykc8VojK2KGS6DcycWfAdMr2edzYg
accept-version:1.1,1.0
heart-beat:10000,10000
<<< CONNECTED
version:1.1
heart-beat:1000,1000
我还验证了SecurityChannelInterceptor正在对所有用户进行身份验证，即使user-name不在CONNECTED回复。
Update
我在heroku上部署了该应用程序。这个问题也在那里发生。
Update
当问题发生时，user in SessionConnectEvent是由SecurityChannelInterceptor but user in SessionConnectedEvent is null.
Update
AppAuth class -
public class AppAuth implements Authentication {
private final User user;
private final Collection<GrantedAuthority> authorities;
public AppAuth(User user) {
this.user = user;
this.authorities = Collections.singleton((GrantedAuthority) () -> "USER");
}
public User getUser() {
return this.user;
}
@Override
public String getName() {
return user.getId();
}
@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
return authorities;
}
@Override
public Object getCredentials() {
return null;
}
@Override
public Object getDetails() {
return null;
}
@Override
public Object getPrincipal() {
return new Principal() {
@Override
public String getName() {
return user.getId();
}
};
}
@Override
public boolean isAuthenticated() {
return true;
}
@Override
public void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException {
}
}
