File Transfer

[Philly0494]

I made a multi-user chat program in VB.Net using the WinSock 6.0 control.

I now need to be able to transfer pictures from client to server and view them on the server. I do this by converting the Image to a Base64String, then send the string over the WinSock TCP connection.

However, a single packet cannot nearly handle the entire picture. Data is cut off after about 4337 characters, and the entire picture is usually at least 250,000 characters.

I made this function that sends file text over winsock, packet by packet.

Public Sub SendFileText(ByVal text As String, Optional ByVal interval As Integer = 3000)
        Dim cPack As String = ""
        If text.Length < interval Then
            Sock.SendData("SS|" & text)
        Else
            Do Until text = ""
                cPack = text.Substring(0, interval)
                Sock.SendData("SS|" & cPack)
                text = text.Substring(interval)
            Loop
        End If
End Sub

I was hoping this would send the file text in parts, so i could then append them on the Server side and rebuild a file.
However, this code behaves the same way as sending the entire file at once does.

I've also noticed that when you try to send multiple packets quickly over a winsock connection that they append to each other, which could explain why this approach isnt working.

Is there any way i can transfer a picture from client to server?

Thanks,
Philly0494