B4J Question WebSocketClient and UniPi API

besoft · Jul 31, 2018

Hello,
I'm trying to connect to UniPi via the Evok UniPI API.

Code used:

B4X:

Sub Process_Globals
   Private fx As JFX
   Private MainForm As Form
   Private ws As WebSocketClient
End Sub

Sub AppStart (Form1 As Form, Args() As String)
   MainForm = Form1
   MainForm.Show
 
   ws.Initialize("ws")
   'accept all trust manager
   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://192.168.8.103:8080/json/relay/3")
   Wait For ws_Connected
   Log("connected")
 
End Sub

I get an error or do not connect to the API. If I enter the address in chrome, I get the answer.
What am I doing wrong?

2018-07-31 20:51:42.991:INFO::JavaFX Application Thread: Logging initialized @602ms 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.HttpExchange.notifyFailureComplete(HttpExchange.java:269)
at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:240)
at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:767)
at org.eclipse.jetty.client.HttpDestination.abort(HttpDestination.java:462)
at org.eclipse.jetty.client.HttpDestination.failed(HttpDestination.java:235)
at org.eclipse.jetty.client.AbstractConnectionPool$1.failed(AbstractConnectionPool.java:141)
at org.eclipse.jetty.client.HttpClient$1.failed(HttpClient.java:593)
at org.eclipse.jetty.util.SocketAddressResolver$Async.lambda$resolve$1(SocketAddressResolver.java:187)
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.lang.Thread.run(Thread.java:748)
Caused by: java.net.UnknownHostException: wss
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
at java.net.InetAddress.getAllByName(InetAddress.java:1192)
at java.net.InetAddress.getAllByName(InetAddress.java:1126)
at org.eclipse.jetty.util.SocketAddressResolver$Async.lambda$resolve$1(SocketAddressResolver.java:167)
... 3 more
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:522)
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.HttpExchange.notifyFailureComplete(HttpExchange.java:269)
at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:240)
at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:767)
at org.eclipse.jetty.client.HttpDestination.abort(HttpDestination.java:462)
at org.eclipse.jetty.client.HttpDestination.failed(HttpDestination.java:235)
at org.eclipse.jetty.client.AbstractConnectionPool$1.failed(AbstractConnectionPool.java:141)
at org.eclipse.jetty.client.HttpClient$1.failed(HttpClient.java:593)
at org.eclipse.jetty.util.SocketAddressResolver$Async.lambda$resolve$1(SocketAddressResolver.java:187)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:760)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:678)
at java.lang.Thread.run(Thread.java:748)
java.util.concurrent.ExecutionException: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
at anywhersoftware.b4j.objects.WebSocketClientWrapper.Close(WebSocketClientWrapper.java:76)
at anywhersoftware.b4j.objects.WebSocketClientWrapper$WSHandler.onWebSocketError(WebSocketClientWrapper.java:118)
at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onError(JettyListenerEventDriver.java:112)
at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingError(AbstractEventDriver.java:96)
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.handleException(WebSocketUpgradeRequest.java:528)
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:522)
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.HttpExchange.notifyFailureComplete(HttpExchange.java:269)
at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:240)
at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:767)
at org.eclipse.jetty.client.HttpDestination.abort(HttpDestination.java:462)
at org.eclipse.jetty.client.HttpDestination.failed(HttpDestination.java:235)
at org.eclipse.jetty.client.AbstractConnectionPool$1.failed(AbstractConnectionPool.java:141)
at org.eclipse.jetty.client.HttpClient$1.failed(HttpClient.java:593)
at org.eclipse.jetty.util.SocketAddressResolver$Async.lambda$resolve$1(SocketAddressResolver.java:187)
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.lang.Thread.run(Thread.java:748)
Caused by: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:515)
... 14 more
Caused by: java.net.UnknownHostException: wss
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
at java.net.InetAddress.getAllByName(InetAddress.java:1192)
at java.net.InetAddress.getAllByName(InetAddress.java:1126)
at org.eclipse.jetty.util.SocketAddressResolver$Async.lambda$resolve$1(SocketAddressResolver.java:167)
... 3 more

woniol · Jul 31, 2018

besoft said:

Hello,
I'm trying to connect to UniPi via the Evok UniPI API.

Code used:

B4X:

Sub Process_Globals
   Private fx As JFX
   Private MainForm As Form
   Private ws As WebSocketClient
End Sub

Sub AppStart (Form1 As Form, Args() As String)
   MainForm = Form1
   MainForm.Show
 
   ws.Initialize("ws")
   'accept all trust manager
   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://wss://192.168.8.103:8080/json/relay/3")
   Wait For ws_Connected
   Log("connected")
 
End Sub

I get an error or do not connect to the API. If I enter the address in chrome, I get the answer.
What am I doing wrong?

Hi,
maybe you should try with this:

B4X:

ws.Connect("wss://192.168.8.103:8080/json/relay/3")

... single wss://

amd make sure that port 8080 is set for ssl connection

besoft · Aug 1, 2018

Thanks for the reply,

B4X:

ws.Connect("wss://192.168.8.103:8080/json/relay/3")

this is a mistake that has already been corrected, I forgot to change when posting.
The case does not work anyway. I am still researching.

Erel · Aug 1, 2018

Where is the updated error message?

PatrikCavina · Aug 1, 2018

Why do you use a WebSocket instead of an HttpJob?

besoft · Aug 1, 2018

Erel said:
Where is the updated error message?

2018-08-01 08:47:44.095:INFO::JavaFX Application Thread: Logging initialized @704ms 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.HttpChannel.abortResponse(HttpChannel.java:156)
at org.eclipse.jetty.client.HttpSender.terminateRequest(HttpSender.java:381)
at org.eclipse.jetty.client.HttpSender.abort(HttpSender.java:566)
at org.eclipse.jetty.client.HttpSender.anyToFailure(HttpSender.java:350)
at org.eclipse.jetty.client.HttpSender$CommitCallback.failed(HttpSender.java:717)
at org.eclipse.jetty.client.http.HttpSenderOverHTTP$HeadersCallback.failed(HttpSenderOverHTTP.java:310)
at org.eclipse.jetty.io.WriteFlusher$PendingState.fail(WriteFlusher.java:263)
at org.eclipse.jetty.io.WriteFlusher.onFail(WriteFlusher.java:516)
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint$FailWrite.run(SslConnection.java:1251)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:760)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:678)
at java.lang.Thread.run(Thread.java:748)
Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at sun.security.ssl.EngineInputRecord.bytesInCompletePacket(EngineInputRecord.java:156)
at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:868)
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:781)
at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.fill(SslConnection.java:681)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.process(HttpReceiverOverHTTP.java:128)
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.onFillable(SslConnection.java:291)
at org.eclipse.jetty.io.ssl.SslConnection$3.succeeded(SslConnection.java:151)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
... 3 more
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:522)
at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:464)
at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:545)
at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:156)
at org.eclipse.jetty.client.HttpSender.terminateRequest(HttpSender.java:381)
at org.eclipse.jetty.client.HttpSender.abort(HttpSender.java:566)
at org.eclipse.jetty.client.HttpSender.anyToFailure(HttpSender.java:350)
at org.eclipse.jetty.client.HttpSender$CommitCallback.failed(HttpSender.java:717)
at org.eclipse.jetty.client.http.HttpSenderOverHTTP$HeadersCallback.failed(HttpSenderOverHTTP.java:310)
at org.eclipse.jetty.io.WriteFlusher$PendingState.fail(WriteFlusher.java:263)
at org.eclipse.jetty.io.WriteFlusher.onFail(WriteFlusher.java:516)
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint$FailWrite.run(SslConnection.java:1251)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:760)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:678)
at java.lang.Thread.run(Thread.java:748)
java.util.concurrent.ExecutionException: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
at anywhersoftware.b4j.objects.WebSocketClientWrapper.Close(WebSocketClientWrapper.java:76)
at anywhersoftware.b4j.objects.WebSocketClientWrapper$WSHandler.onWebSocketError(WebSocketClientWrapper.java:118)
at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onError(JettyListenerEventDriver.java:112)
at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingError(AbstractEventDriver.java:96)
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.handleException(WebSocketUpgradeRequest.java:528)
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:522)
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.HttpChannel.abortResponse(HttpChannel.java:156)
at org.eclipse.jetty.client.HttpSender.terminateRequest(HttpSender.java:381)
at org.eclipse.jetty.client.HttpSender.abort(HttpSender.java:566)
at org.eclipse.jetty.client.HttpSender.anyToFailure(HttpSender.java:350)
at org.eclipse.jetty.client.HttpSender$CommitCallback.failed(HttpSender.java:717)
at org.eclipse.jetty.client.http.HttpSenderOverHTTP$HeadersCallback.failed(HttpSenderOverHTTP.java:310)
at org.eclipse.jetty.io.WriteFlusher$PendingState.fail(WriteFlusher.java:263)
at org.eclipse.jetty.io.WriteFlusher.onFail(WriteFlusher.java:516)
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint$FailWrite.run(SslConnection.java:1251)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:760)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:678)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:515)
... 16 more
Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at sun.security.ssl.EngineInputRecord.bytesInCompletePacket(EngineInputRecord.java:156)
at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:868)
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:781)
at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.fill(SslConnection.java:681)
at org.eclipse.jetty.client.http.HttpReceiverOverHTTP.process(HttpReceiverOverHTTP.java:128)
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.onFillable(SslConnection.java:291)
at org.eclipse.jetty.io.ssl.SslConnection$3.succeeded(SslConnection.java:151)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
... 3 more

besoft · Aug 1, 2018

PatrikCavina said:
Why do you use a WebSocket instead of an HttpJob?

I'm also exploring this option.

OliverA · Aug 1, 2018

1) Quoting from the docs (https://evok-7.api-docs.io/1.06/q9xtwryq3ipgyhbbd/websocket):

To recieve the event messages register your client at the URL ws://your.unipi.ip.address/ws, (the Websocket Handshake/Upgrade endpoint). Once the connection is established you can send the commands specified above to your device.

Should your connection not be

B4X:

ws.Connect("ws://192.168.8.103:8080/ws")

?
Of course I have no experience with the API and I may be quoting the wrong portion of the API docs.

Or

2) The log shows

Caused by: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:515)
... 16 more
Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?

so your connection string may need to be

B4X:

ws.Connect("ws://192.168.8.103:8080/json/relay/3")

besoft · Aug 6, 2018

Please help,
How to use it in B4J ?

B4X:

# Values to be written
value_double=17.89

# URLs of the data points
url_double="http://192.168.1.100:8008/api/tasks/rest_api_task/CNR_IN:ycn"

# Credentials
user="admin"
password="mypasswd"

echo -e "\nWriting data type double ... "
curl -d "{\"v\":$value_double}" -u "$user:$password" -H "Content-Type: application/json" -X POST $url_double

EDIT

I did not ask questions very well, I know how to do this with jShell, I'm interested in how to correctly use HttpJob to use all the parameters.

Erel · Aug 7, 2018

It is very simple however it has nothing to do with this thread. Start a new thread for this question.

besoft · Aug 7, 2018

Thanks for the reply,

In fact, it's still about UniPi Api, the first question is the ua Evok API, this question relates to the Rexygen API. In my opinion, things are very interconnected, so I posted in this section.

Anyway, I'll copy it to a new one.

B4J Question WebSocketClient and UniPi API

besoft

Active Member

woniol

Active Member

besoft

Active Member

Erel

B4X founder

PatrikCavina

Active Member

besoft

Active Member

besoft

Active Member

OliverA

Expert

besoft

Active Member

Erel

B4X founder

besoft

Active Member

Similar Threads