# Session 0007: FTP Progress Callbacks & Upload Button Fix

**Date:** 2026-02-22
**Status:** Completed
**Origin:** MDF Webseiten session 0038

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## Work Done

- [x] Added FTP upload/download progress callbacks to `offsite.py` — prints every 5% with size info
- [x] Increased FTP block size to 256KB for better throughput
- [x] Added `flush=True` and `sys.stdout.reconfigure(line_buffering=True)` for SSE streaming compatibility
- [x] Fixed Upload button — now passes exact filename through frontend → API (`?name=` param) → ops CLI; previously always uploaded the latest backup regardless of which row was clicked
- [x] Added `cache: 'no-store'` to all `fetch()` calls in `app.js` to prevent stale UI state
- [x] Added `renderBackups()` call after upload success and on upload modal close
- [x] Added `/etc/tmpfiles.d/mdf-cleanup.conf` to auto-clean orphan `/tmp/tmp*` dirs older than 1 day
- [x] Increased FTP data socket timeout to 300s for large transfers
- [x] Verified via Playwright: LOCAL + OFFSITE badges display correctly, merge-by-filename works

## Key Decisions / Learnings

- `sys.stdout.reconfigure(line_buffering=True)` is required for progress output to stream through SSE — buffered stdout swallows output
- The upload endpoint must accept a `name=` param; generic "upload latest" is wrong UX when user clicks a specific row
- `cache: 'no-store'` on all fetches is necessary — stale backup list after upload is confusing
- Corrupt backup (`prod_backup_20260219_164913.tar.gz`) failed FTP at ~5% consistently — safe to delete

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**Tags:** #Session #OpsDashboard #Backups #FTP