[MarioPym]

Summary

The legacy public share download endpoint (/s/{token}/download?path=... and ?files=<name>) redirects to the public WebDAV URL by appending the requested node's relative path unencoded. Consequently, folder or file names containing reserved URL characters break the redirect:

• # truncates the path into a URL fragment (e.g., downloading a#b results in /public.php/dav/files/<token>/a#b?accept=zip, causing the client to request /a and fail with a 404).
• Other reserved characters like ? or % cause similar malformed URLs.

This fix encodes the path segment by segment using OCP\Util::encodePath() prior to generating the redirect, leaving names without special characters unaffected.

How to test

1. Create a folder shared with a subfolder a#b containing a file, and share shared by public link.
2. Open /index.php/s/<token>/download?path=/a%23b.
3. Before: Location: .../public.php/dav/files/<token>/a#b?accept=zip → 404.
   After: Location: .../public.php/dav/files/<token>/a%23b?accept=zip → 200, zip with a#b/x.txt.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI