我正在尝试新的(从版本 4.2 开始)java STOMP 客户端支持。我的出发点是入门指南(使用 WebSocket 构建交互式 Web 应用程序 http://spring.io/guides/gs/messaging-stomp-websocket/).
示例中提供了以下端点:
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/hello").withSockJS();
}
我可以使用浏览器客户端成功连接。当尝试使用 java stomp 客户端连接到此端点时,使用以下命令:
WebSocketClient transport = new StandardWebSocketClient();
WebSocketStompClient stompClient = new WebSocketStompClient(transport);
stompClient.setMessageConverter(new StringMessageConverter());
String url = "ws://127.0.0.1:8080/hello";
ListenableFuture<StompSession> future = stompClient.connect(url,myHandler);
我遇到以下异常:
08:56:30.629 [SimpleAsyncTaskExecutor-1] DEBUG o.s.m.simp.stomp.DefaultStompSession - Failed to connect session id=4e6737da-8f68-691d-375f-9e46f48bc149
javax.websocket.DeploymentException: The HTTP response from the server [HTTP/1.1 200 OK
] did not permit the HTTP upgrade to WebSocket
at org.apache.tomcat.websocket.WsWebSocketContainer.parseStatus(WsWebSocketContainer.java:637) ~[tomcat-embed-websocket-8.0.20.jar:8.0.20]
at org.apache.tomcat.websocket.WsWebSocketContainer.processResponse(WsWebSocketContainer.java:621) ~[tomcat-embed-websocket-8.0.20.jar:8.0.20]
at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:309) ~[tomcat-embed-websocket-8.0.20.jar:8.0.20]
at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:152) ~[spring-websocket-4.2.0.BUILD-SNAPSHOT.jar:4.2.0.BUILD-SNAPSHOT]
at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:149) ~[spring-websocket-4.2.0.BUILD-SNAPSHOT.jar:4.2.0.BUILD-SNAPSHOT]
at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.8.0]
at java.lang.Thread.run(Unknown Source) [na:1.8.0]
经过进一步调查,我根据 StompWebSocketIntegrationTests.java 中使用的 TomcatWebSocketTestServer.java 更改了服务器端点配置,如下所示:
RequestUpgradeStrategy upgradeStrategy = new TomcatRequestUpgradeStrategy();
registry.addEndpoint("/hello")
.setHandshakeHandler(new DefaultHandshakeHandler(upgradeStrategy))
.setAllowedOrigins("*");
我现在可以连接,但浏览器客户端无法连接。
GET http://localhost:8080/hello/info 404 (Not Found)
如果我将 .withSockJs() 添加到端点配置中:
RequestUpgradeStrategy upgradeStrategy = new TomcatRequestUpgradeStrategy();
registry.addEndpoint("/hello")
.setHandshakeHandler(new DefaultHandshakeHandler(upgradeStrategy))
.setAllowedOrigins("*")
.withSockJs();
浏览器客户端可以再次连接,但java客户端又回到原来的错误。
我是否应该能够在两个客户端之间共享相同的端点,或者在这种情况下是否需要配置两个单独的端点?