code 400, message Bad request syntax ('0') on my Server

[Wissperwind]

Hi,
I use https://github.com/ezhov-evgeny/webdav-client-python-3 as client

I upload files with the client.
That results in the following console log:

[19/Feb/2021 14:27:24] "HEAD /auth/webdav/24/input/ HTTP/1.1" 200 0
[19/Feb/2021 14:27:26] "PUT /auth/webdav/24/input/Freilauf.CATPart HTTP/1.1" 201 0
[19/Feb/2021 14:27:26] code 400, message Bad request syntax ('0')
[19/Feb/2021 14:27:26] "0" 400 -

the upload works perfectly. But what does the Bad request message mean?
Does the clients is sending a bad request in not the corryt syntax, or are the requests correct and the problem is, that djangodav is just expecting something different?

[Wissperwind]

I think this happens if I upload 0KB files. I think if a file is empty this should not result in a bad request console print in my opinion.