[英]WebSocket with Sockjs & Spring 4 but without Stomp
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: 基于Spring网站的这个教程,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. 现在,我知道@MessageMapping("/hello")
确保如果将消息发送到目的地"/hello"
,则将调用greeting()
方法。 And since the stompClient
is subscribed to "/topic/greetings"
, the @SendTo("/topic/greetings")
will send the message back to the stompClient
. 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. 但是上面的问题是stompClient是一个Stomp对象。 And I want to simply use sock.send('test');
我想简单地使用sock.send('test');
and have it delivered to my server's destination. 并将它发送到我的服务器的目的地。 And I want to do @SendTo("myownclientdestinationmap")
, I can receive it by 我想做@SendTo("myownclientdestinationmap")
,我可以收到它
sock.onmessage = function(e) {
console.log('message', e.data);
};
So, any way to do this with Spring 4, SockJS and without Stomp? 那么,使用Spring 4,SockJS和没有Stomp的任何方法都可以做到这一点? Or does Spring 4 WebSocket only supports Stomp? 或者Spring 4 WebSocket只支持Stomp?
Spring supports STOMP
over WebSocket
but the use of a subprotocol is not mandatory , you can deal with the raw websocket. Spring通过WebSocket
支持STOMP
,但子协议的使用不是强制性的 ,您可以处理原始的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
: 当使用原始websocket时,发送的消息缺少信息以使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 SockJS
for fallback options): 然后将您的处理程序添加到配置中的注册表中(您可以添加多个处理程序并使用SockJS
作为后备选项):
@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);
}
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