如何向具体用户发送websocket消息？

Question

我在服务器端有以下代码：

@Autowired
private SimpMessagingTemplate simpMessagingTemplate;

@MessageMapping("/hello")
public void greeting(@Payload HelloMessage message, Principal principal) throws Exception {
    Thread.sleep(1000); // simulated delay
    simpMessagingTemplate.convertAndSendToUser(principal.getName(), "/topic/greetings", new Greeting("Ololo"));        
}

客户端代码：

function connect() {
    var socket = new SockJS('/gs-guide-websocket');
    stompClient = Stomp.over(socket);
    stompClient.connect({}, function (frame) {
        setConnected(true);
        console.log('Connected: ' + frame);
        stompClient.subscribe('/topic/greetings', function (greeting) {
            showGreeting(JSON.parse(greeting.body).content);
        });
    });
}
function showGreeting(message) {
    $("#greetings").append("<tr><td>" + message + "</td></tr>");
}

我的行动：

我运行应用程序，以user1的身份登录，并启动从客户端到服务器的消息发送，我看到方法greeting是invokes和linesimpMessagingTemplate。convertAndSendToUser（principal.getName（），“/topic/greetings”，new Greeting（“Ololo”）成功执行，但我在客户端没有看到该消息。

我怎么能

Spring Security配置：

@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    private static final String SECURE_ADMIN_PASSWORD = "rockandroll";

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .csrf().disable()
                .formLogin()
                .loginPage("/index.html")
                    .loginProcessingUrl("/login")
                    .defaultSuccessUrl("/sender.html")
                    .permitAll()
                .and()
                .logout()
                    .logoutSuccessUrl("/index.html")
                    .permitAll()
                .and()
                .authorizeRequests()
                .antMatchers("/js/**", "/lib/**", "/images/**", "/css/**", "/index.html", "/","/*.css","/webjars/**", "/*.js").permitAll()
                .antMatchers("/websocket").hasRole("ADMIN")
                .requestMatchers(EndpointRequest.toAnyEndpoint()).hasRole("ADMIN")
                .anyRequest().authenticated();

    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {

        auth.authenticationProvider(new AuthenticationProvider() {

            @Override
            public boolean supports(Class<?> authentication) {
                return UsernamePasswordAuthenticationToken.class.isAssignableFrom(authentication);
            }

            @Override
            public Authentication authenticate(Authentication authentication) throws AuthenticationException {
                UsernamePasswordAuthenticationToken token = (UsernamePasswordAuthenticationToken) authentication;

                List<GrantedAuthority> authorities = SECURE_ADMIN_PASSWORD.equals(token.getCredentials()) ?
                        AuthorityUtils.createAuthorityList("ROLE_ADMIN") : null;

                return new UsernamePasswordAuthenticationToken(token.getName(), token.getCredentials(), authorities);
            }
        });
    }
}

Web套接字配置：

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/gs-guide-websocket").withSockJS();
    }

}

在建议和阅读主题后，我尝试了以下方式向Spring WebSocket上的特定用户发送消息：

服务器端：

simpMessagingTemplate.convertAndSendToUser("user1", "/queue/greetings", new Greeting("Ololo"));

客户端：

stompClient.subscribe('/user1/queue/greetings', function(menuItem){
    alert(menuItem);
});

服务器端：

simpMessagingTemplate.convertAndSendToUser("user1", "/queue/greetings", new Greeting("Ololo"));

客户端：

stompClient.subscribe('/user/queue/greetings', function(menuItem){
    alert(menuItem);
});

服务器端：

simpMessagingTemplate.convertAndSendToUser("user1", "/queue/greetings", new Greeting("Ololo"));

客户端：

stompClient.subscribe('user/user1/queue/greetings', function(menuItem){
    alert(menuItem);
});

反正也不行

Answer 1

它现在在我的领导下起作用

template.convertAndSendToUser("username","/queue/notification",notifications); //server

stompClient.subscribe('/user/username/queue/notification', ....  // client

感谢每一个人

Answer 2

只有在客户端（app.js）上进行了必要的更改：订阅/user/user1/queue/greetings，而不是/user/queue/greetings：

stompClient.subscribe('/user/queue/greetings', ...

然后在网页界面以user1的身份登录。它必须是user1，因为这是针对服务器的用户：

convertAndSendToUser("user1", "/queue/greetings", new Greeting("Ololo")) 

单击“发送”，Ololo消息将显示为客户端警报。