Upload via Android-App does not work with air-gapped instances? #16237
Description
⚠️ Before posting ⚠️
- This is a bug, not a question or an enhancement.
- I've searched for similar issues and didn't find a duplicate.
- I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
- I agree to follow Nextcloud's Code of Conduct.
Steps to reproduce
Setup an air-gapped system: create a wifi setup which allows clients to connect only to selected internal services and make a nextcloud instance one of the few internal services accessible from within this wifi.
Using nextcloud via webbrowser on an android phone works fine.
Using nextcloud via android app does not really work.
Expected behaviour
The app to not care about true internet connectivity if the instance is reachable.
Actual behaviour
The app did not even try to upload any files, even when the NC-instance was reachable without any issues from the same device via webbrowser.
Android version
16
Device brand and model
Oneplus 8t
Stock or custom OS?
Custom (explain in "additional information")
Nextcloud android app version
3.34.1 (fdroid)
Nextcloud server version
31.0.12
Using a reverse proxy?
Yes
Android logs
No response
Server error logs
Additional information
Current LineageOS 23.0