B4J Question help on strange error message

[madru]

Hi,

what does this mean? this comes up after making the following HTTP request.

java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\dev\AppData\Local\Temp\2 (Access is denied)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:114)
at anywheresoftware.b4a.BA$4.run(BA.java:196)
at com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$149(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: C:\Users\dev\AppData\Local\Temp\2 (Access is denied)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at anywheresoftware.b4a.objects.streams.File.OpenOutput(File.java:371)
at b4j.example.httputils2service._hc_responsesuccess(httputils2service.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
... 8 more

Sub MakeRPCRequest( method As String, arguments As List) As Boolean


    Dim IPS_URI As String
    Dim Send As String
    Dim j As HttpJob
    Dim myarguments As String
    j.Initialize("j", Me)
    Dim a As Int
   
    For a = 0 To arguments.Size - 1
        myarguments = myarguments & arguments.Get(a)   
    Next

    IPS_URI = "http://" & "192.168.1.154" & ":3777/api/"
    Send = "{" & Chr(34) & "jsonrpc" & Chr(34) & ":" & Chr(34) & "2.0" & Chr(34) & "," _
    & Chr(34) & "method" & Chr(34) & ":" & Chr(34) & method & Chr(34) & "," _
    & Chr(34) & "params" & Chr(34) & ":[" & myarguments & "]," _
    & Chr(34) & "id" & Chr(34) & ":" & Chr(34) & "NULL" & Chr(34) & "}"

    Log(Send)
    Try
        j.PostString(IPS_URI, Send)
        j.GetRequest.SetContentType("application/json")

    Catch 
        Return False
    End Try

End Sub

THX

Guido

 

[Cableguy]

This line says it all!!

java.io.FileNotFoundException: C:\Users\dev\AppData\Local\Temp\2 (Access is denied

 

[madru]

yes, saw that one but that path is accessible. if the http request is issued for the 2nd time it does work without an error

 

[Cableguy]

it may be a time out issue, have you tried to enclosure the file access lines inside a try/catch ?
that way you could make a small delay between first and second try to access it

 

[madru]

Hi,

no it is not a timing issue , I still have no idea why the 2nd call ends in "Access is denied"

 

[madru]

OK, little update. The error only occurs on Windows, Linux & OS X are not showing that behavior.

 

[Erel]

Please learn how to use smart strings literal: https://www.b4x.com/android/forum/threads/50135/#content

Send = $"{"jsonrpc":"2.0", "method": ${method} ,
  "params":[${myarguments}],
  "id":"NULL"}"$

Or better:

Dim jg As JSONGenerator
jg.Initialize(CreateMap("jsonrpc": method, "params": Array(...), _
   "id": Null))
Log(jg.ToPrettyString(4))

I'm not sure why you get this error (might be the antivirus fault). You can try to use a different folder for the temporary files:

j.Initialize(...)
HttpUtils2Service.TempFolder = File.DirData("MyApp")

 

[madru]

Hi,

will have a look

moving the TempFolder does work, I will do some investigation later ....

as always THX a lot