Describe the bug

Uploading a 0kb file to a secret file drop results in an error however the file appears in the folder multiple times.

Steps to reproduce

1. Create 0kb file
2. Create space and set up a public link as a secret file drop
3. Try to upload the file to the secret file drop. Error is seen.
4. Look in the space and check for file. Multiple copies are there.

Expected behavior

A successful upload of a single file or an error saying the file is empty.

Actual behavior

An error is shown saying upload failed but the upload was successful.

Setup

https://ocis.ocis-keycloak.rolling.owncloud.works/