使用 Spring Websocket 向特定用户发送消息

Question

我使用本教程中描述的 spring 设置了一个 WebSocket：https://spring.io/guides/gs/messaging-stomp-websocket/。我需要的是我的服务器每 5 秒向特定用户发送一条消息。所以我首先做了这个：

@Autowired
private SimpMessagingTemplate template;

@Scheduled(fixedRate = 5000)
public void greet() {
    template.convertAndSend("/topic/greetings", new Greeting("Bufff!"));
}

并且有效。现在只向特定用户发送消息我更改了以下内容：

@Scheduled(fixedRate = 5000)
public void greet() {
   template.convertAndSendToUser("MyName","/queue/greetings", new Greeting("Bufff!"));
}

在 WebSocketConfig.java 中添加队列：

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

更改 GreetingController.java 中的注释：

@MessageMapping("/hello")
@SendToUser("/queue/greetings")
public Greeting UserGreeting(HelloMessage message, Principal principal) throws Exception {
    Thread.sleep(1000); // simulated delay
    return new Greeting("Hello, " + HtmlUtils.htmlEscape(message.getName()) + "!");
}

并更改 app.js 中的连接函数：

var socket = new SockJS('/gs-guide-websocket');
stompClient = Stomp.over(socket);
stompClient.connect({}, function (frame) {
    setConnected(true);
    console.log('Connected: ' + frame);
    stompClient.subscribe('user/queue/greetings', function (greeting) {
        showGreeting(JSON.parse(greeting.body).content);
    });
});

服务器使用 spring-boot-security，我通过使用 SimpUserRegistry ). But unfortunately my code is not working. I already tried this Sending message to specific user using spring but i do not want Spring to distinguish between sessions but users. I also looked at this Sending message to specific user on Spring Websocket 查找所有用户来确定 MyName 是否是正确的名称，但它没有帮助，因为 link 不起作用。

这是我的控制台日志：

2020-01-20 17:08:51.352 DEBUG 8736 --- [nboundChannel-3] .WebSocketAnnotationMethodMessageHandler : Searching methods to handle SEND /app/hello session=kvv0m1qm, lookupDestination='/hello'
2020-01-20 17:08:51.352 DEBUG 8736 --- [nboundChannel-3] .WebSocketAnnotationMethodMessageHandler : Invoking de.iteratec.iteraweb.controllers.GreetingController#UserGreeting[2 args]
2020-01-20 17:08:52.354 DEBUG 8736 --- [nboundChannel-3] org.springframework.web.SimpLogging      : Processing MESSAGE destination=/queue/greetings-userkvv0m1qm session=null payload={"content":"Hello, hey!"}
2020-01-20 17:08:54.882 DEBUG 8736 --- [MessageBroker-2] org.springframework.web.SimpLogging      : Processing MESSAGE destination=/queue/greetings-userkvv0m1qm session=null payload={"content":"Bufff!"}
2020-01-20 17:08:59.883 DEBUG 8736 --- [MessageBroker-4] org.springframework.web.SimpLogging      : Processing MESSAGE destination=/queue/greetings-userkvv0m1qm session=null payload={"content":"Bufff!"}

我是否错过了更改？

Answer 1

您能看到客户端成功订阅了您的端点吗？

我认为您缺少客户端代码中的第一个 / 'user/queue/greetings' 应该是 '/user/queue/greetings'

使用 Spring Websocket 向特定用户发送消息

Sending messages to specific user with Spring Websocket

spring-boot

spring-security

spring-websocket

stomp