Describe the bug

A signed URL provided by the server via the downloadURL dav property doesn't work if the file name contains a #.

Steps to reproduce

1. create a file, name it e.g. test#file.txt
2. request its downloadURL dav property
3. try to download it via the returned URL

Expected behavior

The file gets downloaded.

Actual behavior

The download fails. Not sure about other special characters, I tried a few and they seem to work.