B4J Question Web socket client SSL can't connect

EvgenyB4A · Jul 20, 2023

I have a program that works fine with non secure link to server.
When I try to connect to wss link the connection process lasts about 1 minute and then throws following:

org.eclipse.jetty.websocket.api.UpgradeException: 0 null ....
''''''''''''''''''''
'''''''''''''''''''
WebSocket Closed: 0 null

I can succeed to connect to the same link with BrowserWebSocket Clent extension.

Erel · Jul 20, 2023

1. Not enough information to say anything.
2. Still not clear why you need to use an extension to connect. All browsers support WebSockets.
3. Example of wss connection: https://b4x.com:51041/smiley/index.html

EvgenyB4A · Jul 20, 2023

I need to clarify.
Now I work with web socket client and need to connect it to server with secure connection.
I use an extension to check the link and server if it accepts connections.

Is there any B4J websocket client Ssl example that I can connect to the link you sent me?

teddybear · Jul 21, 2023

EvgenyB4A said:
I have a program that works fine with non secure link to server.
When I try to connect to wss link the connection process lasts about 1 minute and then throws following:

org.eclipse.jetty.websocket.api.UpgradeException: 0 null ....
''''''''''''''''''''
'''''''''''''''''''
WebSocket Closed: 0 null
I can succeed to connect to the same link with BrowserWebSocket Clent extension.

You need a SslContextFactory instance to verify the certificate. try the code below:

B4X:

   Dim  ws As WebSocketClient
   ws.Initialize("ws")
   Dim ssl As JavaObject
   ssl.InitializeNewInstance("org.eclipse.jetty.util.ssl.SslContextFactory", Array(True))
   Dim jo As JavaObject = ws
   Dim wsc As JavaObject
   wsc.InitializeNewInstance("org.eclipse.jetty.websocket.client.WebSocketClient", Array(ssl))
   jo.SetField("wsc", wsc)
   ws.Connect("wss://yourdomanin/...")
   Wait For ws_Connected
   Log("connected")

Erel · Jul 21, 2023

EvgenyB4A said:
Is there any B4J websocket client Ssl example that I can connect to the link you sent me?

Yes. The regular jWebSocketClient.

No need to do anything special unless you are using an unrecognized certificiate.

EvgenyB4A · Jul 23, 2023

teddybear said:

You need a SslContextFactory instance to verify the certificate. try the code below:

B4X:

   Dim  ws As WebSocketClient
   ws.Initialize("ws")
   Dim ssl As JavaObject
   ssl.InitializeNewInstance("org.eclipse.jetty.util.ssl.SslContextFactory", Array(True))
   Dim jo As JavaObject = ws
   Dim wsc As JavaObject
   wsc.InitializeNewInstance("org.eclipse.jetty.websocket.client.WebSocketClient", Array(ssl))
   jo.SetField("wsc", wsc)
   ws.Connect("wss://yourdomanin/...")
   Wait For ws_Connected
   Log("connected")

Unfortunately, I didn't succeed. Can you send example with link you can connect wss?

teddybear · Jul 23, 2023

EvgenyB4A said:
Unfortunately, I didn't succeed. Can you send example with link you can connect wss?

The example is attached, it can connect to wss://b4x.com:51041/smiley/ws

EvgenyB4A · Jul 24, 2023

teddybear said:
The example is attached, it can connect to wss://b4x.com:51041/smiley/ws

Unfortunately, not succeeded.
After about 30 seconds after "Click Me":

Waiting for debugger to connect...
Program started.
2023-07-24 06:41:29.489:INFO::JavaFX Application Thread: Logging initialized @3578ms to org.eclipse.jetty.util.log.StdErrLog
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:515)
at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:464)
at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:545)
at org.eclipse.jetty.client.HttpReceiver.responseFailure(HttpReceiver.java:436)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.failAndClose(HttpReceiverOverHTTP.java:369)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.earlyEOF(HttpReceiverOverHTTP.java:338)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:1476)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.shutdown(HttpReceiverOverHTTP.java:209)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.process(HttpReceiverOverHTTP.java:147)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.receive(HttpReceiverOverHTTP.java:73)
at org.eclipse.jetty.client.http.HttpChannelOverHTTP.receive(HttpChannelOverHTTP.java:133)
at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.onFillable(HttpConnectionOverHTTP.java:155)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ssl.SslConnection$2.run(SslConnection.java:136)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:760)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:678)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.io.EOFException: HttpConnectionOverHTTP@448d137a(l:/192.168.113.154:50995 <-> r:b4x.com/67.227.218.133:51041,closed=false)=>HttpChannelOverHTTP@638e2d52(exchange=HttpExchange@5c5631fa req=TERMINATED/null@null res=PENDING/null@null)[send=HttpSenderOverHTTP@a8a4a87(req=QUEUED,snd=COMPLETED,failure=null)[HttpGenerator@35d9f434{s=START}],recv=HttpReceiverOverHTTP@272fab60(rsp=IDLE,failure=null)[HttpParser{s=CLOSED,0 of -1}]]<-DecryptedEndPoint@3231dec3{b4x.com/67.227.218.133:51041<->/192.168.113.154:50995,OPEN,fill=-,flush=-,to=6/0}->HttpConnectionOverHTTP@448d137a(l:/192.168.113.154:50995 <-> r:b4x.com/67.227.218.133:51041,closed=false)=>HttpChannelOverHTTP@638e2d52(exchange=HttpExchange@5c5631fa req=TERMINATED/null@null res=PENDING/null@null)[send=HttpSenderOverHTTP@a8a4a87(req=QUEUED,snd=COMPLETED,failure=null)[HttpGenerator@35d9f434{s=START}],recv=HttpReceiverOverHTTP@272fab60(rsp=IDLE,failure=null)[HttpParser{s=CLOSED,0 of -1}]]->SocketChannelEndPoint@2480987c{b4x.com/67.227.218.133:51041<->/192.168.113.154:50995,ISHUT,fill=-,flush=-,to=7/0}{io=0/0,kio=0,kro=1}->SslConnection@5ff77226{NEED_WRAP,eio=-1/-1,di=-1}=>HttpConnectionOverHTTP@448d137a(l:/192.168.113.154:50995 <-> r:b4x.com/67.227.218.133:51041,closed=false)=>HttpChannelOverHTTP@638e2d52(exchange=HttpExchange@5c5631fa req=TERMINATED/null@null res=PENDING/null@null)[send=HttpSenderOverHTTP@a8a4a87(req=QUEUED,snd=COMPLETED,failure=null)[HttpGenerator@35d9f434{s=START}],recv=HttpReceiverOverHTTP@272fab60(rsp=IDLE,failure=null)[HttpParser{s=CLOSED,0 of -1}]]
... 13 more
org.eclipse.jetty.websocket.api.UpgradeException: 0 null

Chrome extension succeeds to connect to this link.

teddybear · Jul 24, 2023

Please use Release mode to run it

EvgenyB4A · Jul 24, 2023

teddybear said:
Please use Release mode to run it

Not helps.

teddybear · Jul 24, 2023

EvgenyB4A said:
Not helps.

Try to deploy a local ssl server for the testing

EvgenyB4A · Jul 24, 2023

teddybear said:
Try to deploy a local ssl server for the testing

It will be the problem. Need arrange certificate.
But what may be the problem If from the same PC by another client the connection is being established?
If there another websocket client library on B4J?

EvgenyB4A · Jul 24, 2023

What is the B4J and java version on your pc?

teddybear · Jul 24, 2023

EvgenyB4A said:
What is the B4J and java version on your pc?

B4J 9.8 you can see it from the project. java version is 11

EvgenyB4A · Jul 24, 2023

I use B4J v9.30. May be it is a problem?

teddybear · Jul 24, 2023

EvgenyB4A said:
I use B4J v9.30. May be it is a problem?

I don't think so, my another pc uses 9.30, it also does the connection

EvgenyB4A · Jul 24, 2023

I work from corporate PC.
Any problems with certificates, their plces?

Chris2 · Jul 24, 2023

Does it fail every time you try to connect? Or does it eventually connect OK if you keep trying?

I had a similar ongoing problem that I never completely resolved (https://www.b4x.com/android/forum/t...wont-connect-at-first-attempt.142267/#content). But in that case the connection was eventually successful if I kept trying.

EvgenyB4A · Jul 24, 2023

I tried about 20 times and got occasionly 2 times succes.

Chris2 · Jul 24, 2023

EvgenyB4A said:
and got occasionly 2 times succes

Assuming everything was the same on each attempt, the fact you got a connection OK twice would suggest to me that your connection details & certificate are OK.

Try the suggestions from @OliverA and @Erel in posts #2 & #3 of the thread I linked to.

EvgenyB4A said:
I use B4J v9.30.

Updating to the latest version can't harm as well.

B4J Question Web socket client SSL can't connect

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