我无法使用 Postman 连接到 websocket

Question

我正在尝试使用 websockets 创建一个简单的聊天应用程序。我按照本教程进行操作：https://www.baeldung.com/websockets-spring。

这是我的配置：

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
         registry.addEndpoint("/chat");
         registry.addEndpoint("/chat").withSockJS();
    }
}

@Controller
public class WebSocketController {
    @MessageMapping("/chat")
    @SendTo("/topic/messages")
    public OutputMessage send(Message message) throws Exception {
        return new OutputMessage(message.getFrom(), message.getText(), Instant.now());
    }
}

@Builder
@Getter
public class Message {
    private final String from;
    private final String text;
}

@Builder
@Getter
public class OutputMessage {
    private final String from;
    private final String text;
    private final Instant date;
}

在我得到的应用程序开始时：

2021-12-31 14:22:39.442  INFO 1952 --- [MessageBroker-1] o.s.w.s.c.WebSocketMessageBrokerStats    : WebSocketSession[0 current WS(0)-HttpStream(0)-HttpPoll(0), 0 total, 0 closed abnormally (0 connect failure, 0 send limit, 0 transport error)], stompSubProtocol[processed CONNECT(0)-CONNECTED(0)-DISCONNECT(0)], stompBrokerRelay[null], inboundChannel[pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0], outboundChannel[pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0], sockJsScheduler[pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 0]

我以为我已经配置好了所有东西，所以我决定尝试使用邮递员进行连接，但没有成功：/ 我执行了以下端点：

ws://localhost/app/chat
ws://localhost:8080/app/chat
ws://localhost/chat
ws://localhost:8080/chat

它们都不起作用：/

我正在使用 Postman Websockets beta 来执行请求。

我是否遗漏了配置中的某些内容，还是我使用 postaman 错误？

Answer 1

ws://localhost:8080/chat - 这个端点似乎可以工作。