⚠️ `ui.upload` File upload stops at 99.9% about nicegui HOT 4 OPEN

Oh wow, thanks for the update, @adarshpunj!
Do you have an idea how NiceGUI could check for this limitation? We'd love to show a warning or error message, but I'm not sure how to trigger it.

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Sure, I'm looking into it, will update once I have some info.

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Thanks, @adarshpunj!

So I assume we can boil it down to this reproduction:

ui.upload(on_upload=lambda e: ui.notify(f'{len(e.content.read())} bytes'), auto_upload=True)

Unfortunately I can't reproduce it on my Mac. Can anyone else help?

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@falkoschindler - The culprit here is nginx.

So whenever you upload a file bigger than 1 MB (which is max limit for nginx by default), nginx doesn't allow it on the server and NiceGUI hangs at 99.9%.

I was able to solve it by changing the client_max_body_size in nginx config.

I believe this can be troublesome in production environments, hence an error message from NiceGUI end will be helpful.

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