B4J Question Linux issue

[Fabrice La]

My appli works perfectly in windows.

In linux I have this issue (Seems to be encryption)

I am using jRandomAccessFile

Exception in runnable
java.lang.RuntimeException: java.nio.BufferUnderflowException
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    at anywheresoftware.b4a.BA$2.run(BA.java:158)
    at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
    at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:176)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:176)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)
    at com.sun.glass.ui.gtk.GtkApplication.enterNestedEventLoopImpl(Native Method)
    at com.sun.glass.ui.gtk.GtkApplication._enterNestedEventLoop(GtkApplication.java:144)
    at com.sun.glass.ui.Application.enterNestedEventLoop(Application.java:384)
    at com.sun.glass.ui.EventLoop.enter(EventLoop.java:83)
    at com.sun.javafx.tk.quantum.QuantumToolkit.enterNestedEventLoop(QuantumToolkit.java:523)
    at javafx.stage.Stage.showAndWait(Stage.java:397)
    at anywheresoftware.b4j.objects.Form.ShowAndWait(Form.java:172)
    at b4j.example.frmlogin._show(frmlogin.java:217)
    at b4j.example.main._loginfirst(main.java:154)
    at b4j.example.main._appstart(main.java:96)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:92)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:83)
    at b4j.example.main.start(main.java:33)
    at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
    at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:216)
    at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
    at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:176)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:176)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)
    at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
    at com.sun.glass.ui.gtk.GtkApplication$3$1.run(GtkApplication.java:89)
    at java.lang.Thread.run(Thread.java:744)
Caused by: java.nio.BufferUnderflowException
    at java.nio.Buffer.nextGetIndex(Buffer.java:498)
    at java.nio.DirectByteBuffer.getInt(DirectByteBuffer.java:671)
    at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.ReadInt(RandomAccessFile.java:122)
    at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.readHelper(RandomAccessFile.java:346)
    at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.ReadEncryptedObject(RandomAccessFile.java:343)
    at b4j.example.hexcrypt._fromhexastring(hexcrypt.java:57)
    at b4j.example.hexcrypt._crypt(hexcrypt.java:33)
    at b4j.example.frmlogin._btnok_action(frmlogin.java:78)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:92)
    ... 33 more

 

[Erel]

Are you sure that the correct file exists in the correct path?

 

[Fabrice La]

What do you mean by

correct file exists in the correct path

??

 

[Erel]

You are reading data from a file, right?

 

[Fabrice La]

Yes

Public Sub Crypt(sAction As String, sStrInput As String, sCryptKey As String, sName As String) As String
  sAction = sAction.ToUpperCase
  Select sAction.ToUpperCase
  Case "de".ToUpperCase
      Return FromHexaString(sStrInput, sCryptKey, sName)
  Case "en".ToUpperCase
      Return ToHexaString(sStrInput, sCryptKey, sName)
  End Select
  Return "Rien"
End Sub

Private Sub ToHexaString(sStr As String, sCryptKey As String, sName As String) As String
    Dim raf As RandomAccessFile
    raf.Initialize(File.DirApp,sName & ".dat",False)
    raf.WriteEncryptedObject(sStr,sCryptKey,raf.CurrentPosition)
    raf.Close
    Dim TR As TextReader
    TR.Initialize(File.OpenInput(File.DirApp,sName & ".dat"))
    Dim sRes As String
    sRes = TR.ReadLine
    TR.Close
      Return sRes
End Sub

Private Sub FromHexaString(sStr As String, sCryptKey As String, sName As String) As String
    Dim sRes As String
    Dim raf As RandomAccessFile
    raf.Initialize(File.DirApp, sName & ".dat", False)
    sRes = raf.ReadEncryptedObject(sCryptKey, raf.CurrentPosition)
    raf.Close
Return sRes
End Sub

 

[Erel]

What is the purpose of this TextReader? This is a binary file not a text file.

Does it work if you use raf.WriteObject / ReadObject ?

 

[Fabrice La]

I find out that in Linux Directories are not in the same place that in Windows.

I specified the directory where the files will be saved. Now it works.