B4J Question How to setup a Secure Web Socket server (WSS)

[vfafou]

Hello!

I need to use WSS to the Custom Websocket Push Framework by Erel, in order to conform to the GDPR about encrypted data.
I’ m a little bit confused on how to setup the server and the Android client sides to use WSS instead of simple WS protocol.
Is there any step by step guide?

Thank you in advance!

 

[Erel]

You need to enable SSL: [Server] SSL Connections

And change the url in the client from ws:// to wss:// (and use the correct port).

 

[vfafou]

Hi Erel!
I have done the process to make a keystore an a certificate and I take the following error:

Error occurred on line: 153
java.net.BindException: Address already in use: bind
    at java.base/sun.nio.ch.Net.bind0(Native Method)
    at java.base/sun.nio.ch.Net.bind(Net.java:433)
    at java.base/sun.nio.ch.Net.bind(Net.java:425)
    at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:225)
    at java.base/sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:298)
    at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
    at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.server.Server.doStart(Server.java:431)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at anywheresoftware.b4j.object.ServerWrapper.Start(ServerWrapper.java:211)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:657)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:234)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:159)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:93)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
    at vf.package.main.main(main.java:29)

Any idea?

Thank you in advance!

 

[Erel]

This error means that there is already another server running and listening to the same port. You have probably ran the server twice.

You can run:
ps -ef | grep java

To find the relevant processes and then kill them.
kill <pid>

 

[vfafou]

Hello Erel!

I've finally done the server start with SSL certificate.
My problem is that when I try to connect from an android client to the wss, the client does not connect and I take the following in B4J app:

2018-06-02 00:06:35.580:WARN:oejh.HttpParser:qtp1991313236-22: Illegal character 0x16 in state=START for buffer HeapByteBuffer@3196055b[p=1,l=135,c=8192,r=134]={\x16<<<\x03\x01\x00\x82\x01\x00\x00~\x03\x03\n\xFfP?\x93\x0es...\x03\x00\x0b\x00\x02\x01\x00\x00\n\x00\x04\x00\x02\x00\x17>>>\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00...\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00}

I'm using B4j 6.30, B4A 8.0 and JDK 10.

Thank you in advance!

 

[Erel]

This error happens when you try to connect to a SSL port with http:// link or to a non-SSL port with https:// link.