Android Question Proxy server receives data but What next ?

[somed3v3loper]

Hello all ,

I am building a proxy server based on this code

zerver_NewConnection and ast_Newdata were raised but I don't know what next , How should I forward the data received to their direction , get the response and get it back to the connected application ?

#Region  Service Attributes
    #StartAtBoot: False
    #ExcludeFromLibrary: True
#End Region

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Dim AStreams As AsyncStreams
    Dim zerver As ServerSocket
    
    
End Sub

Sub Service_Create
    'This is the program entry point.
    'This is a good place to load resources that are not specific to a single activity.
    zerver.Initialize(9030,"zerver" )
    Log("Initialized")
    zerver.Listen
    Log("Listening")
End Sub

Sub Service_Start (StartingIntent As Intent)
    Service.StopAutomaticForeground 'Starter service can start in the foreground state in some edge cases.
End Sub

Sub Service_TaskRemoved
    'This event will be raised when the user removes the app from the recent apps list.
End Sub

'Return true to allow the OS default exceptions handler to handle the uncaught exception.
Sub Application_Error (Error As Exception, StackTrace As String) As Boolean
    Return True
End Sub
Sub zerver_NewConnection (Successful As Boolean, NewSocket As Socket)
    Log("zerver_NewConnection")
    If Successful Then
        If AStreams.IsInitialized Then AStreams.Close

        AStreams.Initialize(  NewSocket.InputStream, NewSocket.OutputStream , "ast") 'initialize AsyncStreamsText with the socket streams.
'       

    Else
        Log(LastException)
    End If
    zerver.Listen
End Sub

Sub ast_Newdata(buffer() As Byte)
            
    
End Sub

Sub ast_Terminated
    Log("Connection terminated")
End Sub
Sub Service_Destroy

End Sub

Regards

 

[Erel]

This is not the best way to build a low level server (not a simple task). Your code supports a single client. Example with better design: https://www.b4x.com/android/forum/threads/mjpeg-cctv-server.73792/#content

How should I forward the data received to their direction , get the response and get it back to the connected application ?

You should have another AsyncStream that connects the server with the destination server.

 

[somed3v3loper]

You should have another AsyncStream that connects the server with the destination server.

How can I know the destination server . I tried one application but all I get is a 4-length byte()

 

[Erel]

You will need to implement the protocol: https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt (I think that this is the correct one).