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spring-websocket-client's Issues

Websocket Connection to an external Url Server

Hi dear Jay,

As I understood, you are aware of the routing path in Server side.
( stompSession.send("/app/hello", jsonHello.getBytes());)
I want to establish a websocket connection to an external websocket server url (I don't have access to the server). I have already implemented a javax.websocket ClientEndpoint which can correctly connect to the server, but I want to handle it via Spring (the persistent connection in web).

I have visited different pages like you, which simply created a client-server connection, with the specific server routes and subscriptions . But the problem is I want to just make a persistent websocket via Spring, without the knowledge from the server paths.

Connect to websocket server running in AWS configured with SSL

Hi Jay,
I'm new to websocket. Thank you for the nice sample websocket server & client projects. It worked fine!

  1. Run both server and client apps in ubuntu pc => worked fine.
  2. Run the server in a docker container (in local pc) with a port exposed for websocket connection. Client java app running in local pc => worked fine.

Here is the challenge i faced:
3. Run the server as part of kubernetes container and expose a public port. this setup runs behind a "SSL secured" setup in AWS.

  • The exposed url is similar to : wss://serverqdffgi4t-my-interface-server-6000.mydomain.com/chat
  • The response to the request http://serverqdffgi4t-my-interface-server-6000.mydomain.com/chat/info was {"entropy":-730266629,"origins":["*:*"],"cookie_needed":false,"websocket":true}
  • When the execution comes to the point StompSession session = stompClient.connect(url, sessionHandler).get();, there was a handshake exception:

I get an exception in the call stompClient.connect().

Exception Log: 

00:25:00.891 [main] DEBUG org.springframework.web.socket.sockjs.client.RestTemplateXhrTransport - Executing SockJS Info request, url=https://server2q809nz0-dedicated-container-server-6000.mydomain.com/chat/info
00:25:04.590 [main] DEBUG org.springframework.web.client.RestTemplate - Created GET request for "https://server2q809nz0-dedicated-container-server-6000.mydomain.com/chat/info"
00:25:08.534 [main] DEBUG org.springframework.web.client.RestTemplate - GET request for "https://server2q809nz0-dedicated-container-server-6000.mydomain.com/chat/info" resulted in 200 (null)
00:25:08.563 [main] DEBUG org.springframework.web.socket.sockjs.client.WebSocketTransport - Starting WebSocket session url=wss://server2q809nz0-dedicated-container-server-6000.mydomain.com/chat/921/0fc9bec2e7b34b798d7b7492f0477120/websocket
00:25:08.563 [main] DEBUG org.springframework.web.socket.client.standard.StandardWebSocketClient - Connecting to wss://server2q809nz0-dedicated-container-server-6000.mydomain.com/chat/921/0fc9bec2e7b34b798d7b7492f0477120/websocket
00:25:09.233 [SimpleAsyncTaskExecutor-1] ERROR org.springframework.web.socket.sockjs.client.DefaultTransportRequest - No more fallback transports after TransportRequest[url=wss://server2q809nz0-dedicated-container-server-6000.mydomain.com/chat/921/0fc9bec2e7b34b798d7b7492f0477120/websocket]
javax.websocket.DeploymentException: The HTTP request to initiate the WebSocket connection failed
	at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:392)
	at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:150)
	at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:147)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.concurrent.ExecutionException: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
	at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WrapperFuture.get(AsyncChannelWrapperSecure.java:510)
	at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:336)
	... 4 common frames omitted
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
	at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1521)
	at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:528)
	at sun.security.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1197)
	at sun.security.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1165)
	at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:469)
	at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WebSocketSslHandshakeThread.run(AsyncChannelWrapperSecure.java:371)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
	at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1709)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:318)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
	at sun.security.ssl.Handshaker$1.run(Handshaker.java:970)
	at sun.security.ssl.Handshaker$1.run(Handshaker.java:967)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459)
	at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WebSocketSslHandshakeThread.run(AsyncChannelWrapperSecure.java:397)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:450)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:317)
	at sun.security.validator.Validator.validate(Validator.java:262)
	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:330)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:289)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:144)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1626)
	... 7 common frames omitted
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:445)
	... 13 common frames omitted
00:25:09.234 [SimpleAsyncTaskExecutor-1] DEBUG org.springframework.messaging.simp.stomp.DefaultStompSession - Failed to connect session id=dc74d342-7db9-166c-faa5-7d24561dd0d5
javax.websocket.DeploymentException: The HTTP request to initiate the WebSocket connection failed
	at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:392)
	at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:150)
	at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:147)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.concurrent.ExecutionException: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
	at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WrapperFuture.get(AsyncChannelWrapperSecure.java:510)
	at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:336)
	... 4 common frames omitted
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
	at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1521)
	at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:528)
	at sun.security.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1197)
	at sun.security.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1165)
	at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:469)
	at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WebSocketSslHandshakeThread.run(AsyncChannelWrapperSecure.java:371)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
	at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1709)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:318)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
	at sun.security.ssl.Handshaker$1.run(Handshaker.java:970)
	at sun.security.ssl.Handshaker$1.run(Handshaker.java:967)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459)
	at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WebSocketSslHandshakeThread.run(AsyncChannelWrapperSecure.java:397)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:450)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:317)
	at sun.security.validator.Validator.validate(Validator.java:262)
	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:330)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:289)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:144)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1626)
	... 7 common frames omitted
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:445)
	... 13 common frames omitted

Could you kindly help me ?

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