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[英]Websockets in Jelastic: DeploymentException: The HTTP response from the server did not permit the HTTP upgrade to WebSocket
[英]The HTTP response from the server [200] did not permit the HTTP upgrade to WebSocket
我在 STOMP Java 客戶端(Spring 項目)中開發了我的 websocket 客戶端,並在 Spring 啟動中實現了服務器。
當客戶端/服務器握手發生時,我遇到了連接升級問題。
Java客戶端代碼
List<Transport> transports = new ArrayList<>(1);
transports.add(new WebSocketTransport(new StandardWebSocketClient()));
SockJsClient sockjsClient = new SockJsClient(transports);
WebSocketStompClient stompClient = new WebSocketStompClient(sockjsClient);
stompClient.setMessageConverter(new MappingJackson2MessageConverter());
stompClient.setTaskScheduler(new ConcurrentTaskScheduler());
StompSessionHandler sessionHandler = new SessionHandler();
stompClient.connect("ws://localhost:9090/health", sessionHandler);
服務器端
@Override
public void registerStompEndpoints(StompEndpointRegistry stompEndpointRegistry) {
stompEndpointRegistry.addEndpoint("/health")
.setAllowedOrigins("*")
.withSockJS();
}
@Override
public void configureMessageBroker(MessageBrokerRegistry registry) {
registry.enableSimpleBroker("/topic");
registry.setApplicationDestinationPrefixes("/app");
}
連接到服務器時在客戶端生成的異常
16:18:50.955/3771 [SimpleAsyncTaskExecutor-1] ERROR o.s.w.s.s.c.DefaultTransportRequest - No more fallback transports after TransportRequest[url=ws://localhost:9090/health/29/344d627baac949f5bab5506f05f1a7eb/websocket] javax.websocket.DeploymentException: The HTTP response from the server [200] did not permit the HTTP upgrade to WebSocket at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServerRecursive(WsWebSocketContainer.java:434) at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServerRecursive(WsWebSocketContainer.java:392) at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:194) at org.springframework.web.socket.client.standard.StandardWebSocketClient.lambda$doHandshakeInternal$0(StandardWebSocketClient.java:150) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.lang.Thread.run(Thread.java:745)
在 tomcat localhost_access_log 中,我看到以下請求信息
127.0.0.1 - - [01/Nov/2018:22:09:41 +0530] "GET /health/info HTTP/1.1" 302 - 0 127.0.0.1 - - [01/Nov/2018:22:09:41 +0530] "GET /login.jsp HTTP/1.1" 200 7649 16 127.0.0.1 - - [01/Nov/2018:22:09:41 +0530] "GET /health/191/6828a1fdefee40cf8dc74e825d8d2b0c/websocket HTTP/1.1" 302 - 0 127.0.0.1 - - [01/Nov/2018:22:09:41 +0530] "GET /login.jsp HTTP/1.1" 200 7649 0
我沒有找到有關如何解決此問題及其原因的任何信息。
請幫我解決這個問題。
為您的問題提供有用的解決方案為時已晚。 今天我面臨着你已經經歷過的同樣問題。 不幸的是,Spring Framework 示例和官方資源並未完全引用。 因此,我想寫下我是如何創建和運行它的。 首先,原始答案不屬於我。 我在https://code5.cn/so/java/783097找到了它。
據我所知,為了能夠從 HTTP 升級 WebSocket 協議,我們應該使用所需的功能擴展“WebSocketConfiguration”部分。
RequestUpgradeStrategy upgradeStrategy = new TomcatRequestUpgradeStrategy();
registry.addEndpoint("/hello")
.withSockJS();
registry.addEndpoint("/hello")
.setHandshakeHandler(new DefaultHandshakeHandler(upgradeStrategy))
.setAllowedOrigins("*");
做完以上調整后,你可以通過嗅探WireShark來理解協議之間的切換。
我希望它對正在尋找擺脫錯誤的方法的人有所幫助。
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