問題描述

我正在構建一個使用 Spring Boot、RabbitMQ 和 WebSocket 作為 POC 的網絡聊天，但我被困在最后一點:WebSockets
我希望我的 ws 客戶端連接到特定端點，例如 /room/{id} 并且當新消息到達時，我希望服務器將響應發送給客戶端，但我搜索了類似的東西并沒有找到.

I'm building a webchat with Spring Boot, RabbitMQ and WebSocket as POC, but I'm stucked a the last point: WebSockets
I want my ws clients to connect to a specific endpoint, like /room/{id} and when a new message arrives, I want the server to send the response to clients, but I searched for something similar and didn't found.

目前，當消息到達時，我使用RabbitMQ對其進行處理，例如

Currently, when the message arrives, I process it with RabbitMQ, like

container.setMessageListener(new MessageListenerAdapter(){
            @Override
            public void onMessage(org.springframework.amqp.core.Message message, Channel channel) throws Exception {
                log.info(message);
                log.info("Got: "+ new String(message.getBody()));
            }
        });

我想要的是，而不是記錄它，我想將它發送給客戶端，例如:websocketManager.sendMessage(new String(message.getBody()))

what I would like is, instead log it , I want to send it to the client, for example: websocketManager.sendMessage(new String(message.getBody()))

推薦答案

好的，我想我明白了，給需要的人，這里是答案:

Ok, I think I got it, for everyone who needs it, here is the answer:

首先，需要在 pom.xml 中添加 WS 依賴

first, you need to add WS dependencies to the pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-messaging</artifactId>
</dependency>

創建一個 WS 端點

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        // the endpoint for websocket connections
        registry.addEndpoint("/stomp").withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/");

        // use the /app prefix for others
        config.setApplicationDestinationPrefixes("/app");
    }

}

注意:我使用的是 STOMP，所以客戶端應該像這樣連接

Note: I'm using STOMP, so the clients should connect like this

<script type="text/javascript">
    $(document).ready(function() {
        var messageList = $("#messages");
        // defined a connection to a new socket endpoint
        var socket = new SockJS('/stomp');
        var stompClient = Stomp.over(socket);
        stompClient.connect({ }, function(frame) {
            // subscribe to the /topic/message endpoint
            stompClient.subscribe("/room.2", function(data) {
                var message = data.body;
                messageList.append("<li>" + message + "</li>");
            });

        });
    });
</script>

然后，您可以簡單地使用

Then, you can simply wire the ws messenger on your components with

@Autowired
private SimpMessagingTemplate webSocket;

并使用

webSocket.convertAndSend(channel, new String(message.getBody()));

這篇關于Spring:向 websocket 客戶端發送消息的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！