WhatsAPP demo access violation after receiving message

FNC TMS FNC WebSocket
1

Hello, I'm playing with de WhatsApp demo using websocket and I'm getting an access violation on server after receiving a message.

VCL.TMSFNCWebSocketServer 862 +1 TTMSFNCWebSocketServerConnection.GetPeerIP
u_main 253 +1 TFrmMain.WAS_OnDisconnect
VCL.TMSFNCWebSocketServer 737 +2 TMSFNCCustomWebSocketServer.HTTPServerDisconnect$ActRec.$0$Body

Using Delphi 10.2.3,
Version 2.5.0.3 of TMS FNC Cloud Pack
Version 1.0.0.4 of TMS FNC WebSocket

Thanks for your help

Regards

Job Espejel

2

Hi,

Which demo is this? The WhatsApp receiver demo we created with TMS FNC WebSocket is an FMX application but based on the messages you pasted here you are working with a VCL project? Did you try to recreate the demo in VCL?

3

Hello, I forgot to mention that the error is present in the original demo for FMX, then I recreated the demo for VCL, with the same error.

Regards

Job Espejel

exception message : Access violation at address 00B19B8C in module 'TMSFNCWhatsAppServer.exe'. Read of address 000000B8.

main thread ($e50):
00b19b8c +014 TMSFNCWhatsAppServer.exe FMX.TMSFNCWebSocketServer 862 +1 TTMSFNCWebSocketServerConnection.GetPeerIP
00b4a27b +02b TMSFNCWhatsAppServer.exe Main 84 +1 TForm1.TMSFNCWhatsAppServer1Disconnect
00b1951c +030 TMSFNCWhatsAppServer.exe FMX.TMSFNCWebSocketServer 737 +2 TTMSFNCCustomWebSocketServer.HTTPServerDisconnect$ActRec.$0$Body
0053b846 +13a TMSFNCWhatsAppServer.exe System.Classes 14893 +32 CheckSynchronize
00923f2b +00f TMSFNCWhatsAppServer.exe FMX.Platform.Win 3883 +3 TPlatformWin.ThreadSync
0053f2dc +014 TMSFNCWhatsAppServer.exe System.Classes 17405 +8 StdWndProc
75bd5f7b +00b USER32.dll DispatchMessageW
0091c273 +02f TMSFNCWhatsAppServer.exe FMX.Platform.Win 705 +8 TPlatformWin.HandleMessage
0099e5bf +03b TMSFNCWhatsAppServer.exe FMX.Forms 1842 +3 TApplication.HandleMessage
0091c072 +03a TMSFNCWhatsAppServer.exe FMX.Platform.Win 643 +6 TPlatformWin.Run
0099efa3 +03f TMSFNCWhatsAppServer.exe FMX.Forms 2165 +3 TApplication.Run
00b5e193 +03b TMSFNCWhatsAppServer.exe TMSFNCWhatsAppServer 18 +3 initialization
76aa00f7 +017 KERNEL32.DLL BaseThreadInitThunk

4

It seems like you implemented the OnDisconnect event, is that correct?

There was an issue with events being synchronized with the main thread automatically. We've added a property to disable this (although this way you need to sync any UI element manipulation yourself).

This fix was not yet released.

5

Thanks, meanwhile I disabled the OnDisconnect event.