TerraMaster Forum

Hi!
I get the 412 Precondition Failed error when I try to rename or move something via the embedded WebDAV server over HTTPS.

CyberDuck shows the error "Unexpected response (412 Precondition Failed)."

I tried to connect using the hostname, IP address, and WebDAV port proxying via SSH. The result is the same everywhere.

How can I understand why this is so?

I also get this error over HTTP webdav.
BUT if I connect webdav as a folder in the TOS itself at 127.0.0.1:port, then it can rename and move files without this error.

It seems that the webdav client built into TOS does not fully comply with the standard and therefore works

What model and system version are you currently running?

model F8
ver 6.0.673

I debugged through curl and found out that this is because the clients (macOS finder and Cyberduck) send the Overwrite:F header if the new file name does not exist and then the webdav server rejects the request. If you force Overwrite:T, then renaming and moving works.
It seems that this is incorrect server behavior. If Overwrite:F and the target file does not exist, this should work.