Cannot create new files (txt, md, odt) from web UI with decomposeds3 backend: "error getting the content length"

[ffuhrnew]

Describe the bug

Creating new files directly from the web UI fails when using the decomposeds3 storage driver.
Uploading existing files works fine. Only creating new (empty) files via "New → Plain text / Markdown / Document" fails.

Environment

• OpenCloud Version: 7.0.0 (rolling, compiled 2026-05-21)
• Deployment: bare-metal (Debian Trixie)
• Storage driver: decomposeds3
• S3 backend: Garage (S3-compatible)
• Reverse proxy: Zoraxy

Steps to reproduce

1. Configure OpenCloud with STORAGE_USERS_DRIVER=decomposeds3
2. Log in to web UI
3. Click "New" → "Plain text file" (or Markdown, or ODT)
4. File creation fails with error dialog

Expected behavior

New file is created and appears in the file list.

Actual behavior

File creation fails. Error shown to user: X-Request-Id: ...

Relevant log output

[micbar]

I cannot reproduce the problem.

Are you sure that your reverse proxy is not changing the Request? I heard that zoraxy uses Chunked uploads and therefore content length headers are broken.