Spring 4 websocket without STOMP,socketjs

Question

I am trying to test websocket without using socketjs library and also i don't want to add any stomp connection.

I am following the example from stackoverflow question: WebSocket with Sockjs & Spring 4 but without Stomp

So without stomp server , I have succeeded to connect via socketjs library with a url : ws://localhost:8080/greeting/741/0tb5jpyi/websocket

And now I want to remove the socketjs library to allow raw websocket connection(may be devices such as android,ios, etc...)

When I remove the parameter : .withSockJS(), I couldn't connect via websocket.

I tried the following URLs, but they didn't work:

ws://localhost:8080/greeting/394/0d7xi9e1/websocket not worked
ws://localhost:8080/greeting/websocket not worked
ws://localhost:8080/greeting/ not worked 

which URL should i use to connect ?

Answer 1

I'm using websockets without STOMP in my project.

The following configuration works with spring-boot.

add spring boot websocket dependency in pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
    <version>${spring-boot.version}</version>
</dependency>

Then add a class (here WebSocketServerConfiguration.java), which configures your websocket:

@Configuration
@EnableWebSocket
public class WebSocketServerConfiguration implements WebSocketConfigurer {

    @Autowired
    protected MyWebSocketHandler webSocketHandler;

    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(webSocketHandler, "/as");
    }
}

finally you can write your WebsocketHandler. Spring provides you different abstract classes for WebSocketHandlers (in main-package: org.springframework.web.socket.handler). My websocket is configured without STOMP and my client doesn't use socket.js. Therefore MyWebSocketHandler extends TextWebSocketHandler and overrides the methods for errors, opening and closing connections and received texts.

@Component
public class MyWebSocketHandler extends TextWebSocketHandler {
    ...

    @Override
    public void handleTransportError(WebSocketSession session, Throwable throwable) throws Exception {
        LOG.error("error occured at sender " + session, throwable);
        ...
    }

    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
        LOG.info(String.format("Session %s closed because of %s", session.getId(), status.getReason()));

        ...
    }

    @Override
    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
        LOG.info("Connected ... " + session.getId());

        ...
    }

    @Override
    protected void handleTextMessage(WebSocketSession session, TextMessage jsonTextMessage) throws Exception {
        LOG.debug("message received: " + jsonTextMessage.getPayload());
        ...
    }
}