springcloudgateway转发websocket

一，前端页面

　　1.原生请求

//建立连接
this.websocket = new WebSocket('ws://localhost:8085/websocket/user?token='+auth);
  //接收
   this.websocket.onmessage = function(e){
 　　　　console.log(e.data);
   }
//发送
this.websocket.send(text);

　　2.sockJS请求

//建立连接
var sock = new SockJS('http://localhost:8085/websocket',null,{timeout: 30000});
var stomp = Stomp.over(sock);
var headers = {
login: 'mylogin',
passcode: 'mypasscode',
'client-id': 'my-client-id',
'Authorization':auth};
stomp.connect(headers,
    function(frame){    
//订阅主题
            stomp.subscribe('/user/updateInfo',(resp)=>{        
                console.log(resp.body);
                resp.ack();
            });

//发送
stomp.send("/user", {'Authorization': auth},payload); 

二，gateway配置

spring:
  cloud:
    gateway:
      routes:
      # SockJS首次info路由
      - id: websocket_sockjs_route
        uri: lb://testService
        predicates:
        - Path=/websocket/info/**
      # Websocket原生路由
      - id: websocket_route
        uri: lb：ws://testService
        predicates:
        - Path=/websocket/**

三，服务端

　　1.tomcat实现

@Configuration
public class WebsocketConfig {

    @Bean
    public ServerEndpointExporter serverEndpointExporter( ) {
       return new ServerEndpointExporter();
    }
}

@Component
@ServerEndpoint("/websocket/user")
public class WebsocketController {

    Session testSession = null;

    @OnOpen
    public void onOpen(Session session){

        testSession = session;

        System.out.println("ws connected!!");
        sendMessage("ws connected!!");
    }

    @OnMessage
    public void onMessage(String msg,Session session){
        System.out.println("msg '" +msg+ "' received!!");

        try {
            sendMessage("msg '" +msg+ "' received!");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void sendMessage(String msg) {
        try {
            this.testSession.getBasicRemote().sendText(msg);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @OnClose
    public void onClose(Session session){
        System.out.println("ws closed!!");
    }

}

　　2.spring实现

　　

@Configuration
@EnableWebSocket
public class WebsocketSpringConfig implements WebSocketConfigurer {



    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(new WebsocketSpringController(),"/websocket/user").addInterceptors(new WebsocketInterceptor()).setAllowedOrigins("http://localhost");
    }
}

public class WebsocketInterceptor implements HandshakeInterceptor {
    @Override
    public boolean beforeHandshake(ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse, WebSocketHandler webSocketHandler, Map<String, Object> map) throws Exception {
        map.put("token","");
        return true;
    }

    @Override
    public void afterHandshake(ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse, WebSocketHandler webSocketHandler, Exception e) {
    }
}


public class WebsocketSpringController extends TextWebSocketHandler {

    private final String charset = "UTF-8";
    private WebSocketSession session;

    @Override
    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
        this.session = session;
        System.out.println(session);
        session.sendMessage(new TextMessage("connected..."));

    }

    @Override
    protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
        String payload = message.getPayload();
        System.out.println(payload);
        session.sendMessage(new TextMessage("received:" + payload));

    }

    @Override
    public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
        super.handleTransportError(session, exception);
    }

    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
        super.afterConnectionClosed(session, status);
    }
}