File_upload is uploading the file but the value is always None

Harshitha · May 28, 2024, 2:04pm

File_upload widget is not printing the value and always None.

ahuang11 · May 28, 2024, 3:57pm

Hi can you share an minimal example?

Harshitha · May 28, 2024, 6:33pm

I hope this helps you get an idea about the bug!

ahuang11 · May 28, 2024, 6:48pm

How big is the file?

Harshitha · May 28, 2024, 6:59pm

file size is 208.3 Mb

ahuang11 · May 28, 2024, 7:37pm

Likely too big, or at least it hasn’t finished uploading so value is None.

ahuang11 · June 14, 2024, 6:54pm

I encountered this myself:

  --websocket-max-message-size BYTES
                        Set the Tornado websocket_max_message_size value (default: 20MB)

If it’s above 20 MBs the websocket will disconnect:

2024-06-14 11:39:36,766 WebSocket connection closed: code=None, reason=None

So, you have to panel serve sql_app.py --websocket-max-message-size 157286400 (this is for 150 MBs)