Java 带有 Sockjs 和 Spring 4 但没有 Stomp 的 WebSocket
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WebSocket with Sockjs & Spring 4 but without Stomp
提问by BlueChips23
Is there a way to use WebSockets with SockJS client and Spring 4 server but not using STOMP?
有没有办法将 WebSockets 与 SockJS 客户端和 Spring 4 服务器一起使用但不使用 STOMP？
Based on this tutorial from Spring's website, I know how to set up a WebSocket based application using Stomp and Spring 4. On the client side, we have:
根据 Spring 网站上的本教程，我知道如何使用 Stomp 和 Spring 4 设置基于 WebSocket 的应用程序。在客户端，我们有：
var socket = new SockJS('/hello');
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);
});
});
And on the server side, we have the following in the controller:
在服务器端，我们在控制器中有以下内容：
@MessageMapping("/hello")
@SendTo("/topic/greetings")
public Greeting greeting(HelloMessage message) throws Exception {
Thread.sleep(3000); // simulated delay
return new Greeting("Hello, " + message.getName() + "!");
}
Now, I understand that @MessageMapping("/hello")ensures that if a message is sent to a destination "/hello", then the greeting()method will be called. And since the stompClientis subscribed to "/topic/greetings", the @SendTo("/topic/greetings")will send the message back to the stompClient.
现在，我明白@MessageMapping("/hello")确保如果将消息发送到目的地"/hello"，则将greeting()调用该方法。并且由于stompClient订阅了"/topic/greetings"，@SendTo("/topic/greetings")会将消息发送回stompClient。
But the problem with the above is that stompClient is a Stomp object. And I want to simply use sock.send('test');and have it delivered to my server's destination. And I want to do @SendTo("myownclientdestinationmap"), I can receive it by
但是上面的问题是 stompClient 是一个 Stomp 对象。我想简单地使用sock.send('test');并将其交付到我的服务器目的地。我想做@SendTo("myownclientdestinationmap")，我可以通过
sock.onmessage = function(e) {
console.log('message', e.data);
};
So, any way to do this with Spring 4, SockJS and without Stomp? Or does Spring 4 WebSocket only supports Stomp?
那么，在没有 Stomp 的情况下，有什么方法可以使用 Spring 4、SockJS 来做到这一点？还是 Spring 4 WebSocket 只支持 Stomp？
采纳答案by Sergi Almar
Spring supports STOMPover WebSocketbut the use of a subprotocol is not mandatory, you can deal with the raw websocket. When using a raw websocket, the message sent lacks of information to make Spring route it to a specific message handler method (we don't have any messaging protocol), so instead of annotating your controller, you'll have to implement a WebSocketHandler:
Spring 支持STOMPoverWebSocket但子协议的使用不是强制性的，您可以处理原始 websocket。使用原始 websocket 时，发送的消息缺少信息，无法使 Spring 将其路由到特定的消息处理程序方法（我们没有任何消息传递协议），因此您不必注释控制器，而是必须实现WebSocketHandler：
public class GreetingHandler extends TextWebSocketHandler {
@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) {
Thread.sleep(3000); // simulated delay
TextMessage msg = new TextMessage("Hello, " + message.getPayload() + "!");
session.sendMessage(msg);
}
}
And then add your handler to the registry in the configuration (you can add more than one handler and use SockJSfor fallback options):
然后将您的处理程序添加到配置中的注册表（您可以添加多个处理程序并SockJS用于回退选项）：
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(greetingHandler(), "/greeting").withSockJS();
}
@Bean
public WebSocketHandler greetingHandler() {
return new GreetingHandler();
}
}
The client side will be something like this:
客户端将是这样的：
var sock = new SockJS('http://localhost:8080/greeting');
sock.onmessage = function(e) {
console.log('message', e.data);
}
