我有一个Spring Boot服务器和一个客户端,它们使用STOMP通过Websockets连接。
我的用例是,每次向特定端点发出http请求时,我都希望将数据发送到客户端。 我发现的所有教程都仅说明了这种情况,即客户端向“ / hello”发送了一些数据,服务器通过向“ topic / greetings”发送了数据做出了反应:
@MessageMapping("/hello")
@SendTo("/topic/greetings")
public Greeting greeting(HelloMessage message) throws Exception {
Thread.sleep(1000); // simulated delay
return new Greeting("Hello, " + HtmlUtils.htmlEscape(message.getName()) + "!");
}
我需要的是一种无需消息映射即可发送数据的控制器方法。每当有人向端点执行获取请求时,它就应该仅将数据发送到客户端。我尝试了以下操作,但没有成功:
@Autowired
private SimpMessagingTemplate msgTemplate;
@SendTo("topic/data-received")
@RequestMapping(value = "/send-data", method = RequestMethod.POST)
public String sendData(@RequestHeader(value = "id") String id,
@RequestHeader(value = "data") String data) {
User user = new User();
user.id = UUID.fromString(id);
user.stringData = data;
database.saveStringData(user);
msgTemplate.convertAndSend("topic/data-received", "data sent!!");
return "successful";
}
这是我的客户代码:
function connect() {
var socket = new SockJS('/clipboard-websocket');
var stompClient = Stomp.over(socket);
stompClient.connect({}, function (frame) {
console.log('Connected: ' + frame);
stompClient.subscribe('topic/data-received/', function (message) {
alert("Data received!!");
});
}
这是我的WebSocket配置:
@Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.enableSimpleBroker("/topic");
config.setApplicationDestinationPrefixes("/app");
}
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/clipboard-websocket").withSockJS();
}
答案 0 :(得分:1)
目标中缺少跟踪斜线
msgTemplate.convertAndSend("/topic/data-received", "data sent!!");