Developer
ba01ad7c0c
The app was saturating qBittorrent's single-threaded web server and causing
its own Web UI (and the reverse proxy) to hang/504: each of the 3 qBittorrent
widgets fetched /sync/maindata independently, every call was a FULL snapshot
(no rid), and polling was aggressive (5s for speed). For large torrent lists
each snapshot is heavy, so the server queued and Traefik timed out.
QbittorrentClient.maindata now:
- Uses the incremental rid protocol: the first call is a full_update;
subsequent calls send the last rid and get a small diff that is merged into
a cached snapshot (full_update replaces; partial_update merges server_state,
torrents {added/None-removed/..._removed}, categories, tags, trackers).
Payloads shrink dramatically for large libraries.
- Serves a short-TTL (3s) cached snapshot under a lock, so concurrent widget
polls collapse onto a single HTTP fetch instead of N.
- Backs off exponentially (capped 30s) on repeated failure, serving the last
good snapshot when available, so a struggling qBittorrent isn't hammered
further. Returns a shallow race-safe copy of the snapshot per call.
Also slow the speed widget poll from 5s -> 15s (backend widget-kind +
frontend registry) for ~3x fewer calls.
Tests: rid full+partial merge, cache collapses within-TTL calls, backoff
skips the network after failure and serves stale. 393/393 backend + 180/180
frontend tests pass; ruff + tsc + ESLint clean.
Manage Frontend
React + TypeScript SPA for Manage, consuming the FastAPI backend.
Tech Stack
- Vite — Build tool
- React 18+ — UI framework
- TypeScript — Type safety
- @tanstack/react-query — Data fetching/caching
- @tanstack/react-table — Data tables (media, file browser)
- react-router-dom — Client-side routing
- Tailwind CSS + shadcn/ui — Styling
Setup
cd frontend
npm install
Development
npm run dev
Runs on http://localhost:5173 with API requests proxied to http://localhost:8000.
Make sure the backend is running:
cd ../backend
uvicorn media_library_viewer_api.main:app --reload --port 8000
Build
npm run build
Output goes to frontend/dist/.
Pages
- Dashboard (
/) — Now playing, library stats, configurable widgets and shortcuts, frontend/backend version chips in the shell header - Observability (
/observability) — Thin dashboard: Alertmanager alerts, Prometheus target health, machine status, and Grafana deep-links (no in-app charting) - Media (
/media) — Full-library table with sort/filter/search - Users (
/users) — Read-only Jellyfin user list with optional Jellyseerr enrichment - File Browser (
/files) — Remote directory browsing, ffprobe preview, jobs - Settings (
/settings) — Persistent monitoring machine definitions, SSH keys, and setup workflow - Actions (
/actions) — Saved server tasks (shell/python) targeting ssh_tasks services
Environment Variables
Set VITE_API_URL and any OIDC variables directly in your shell or Compose build args if the API is not at http://localhost:8000.
The frontend version defaults to the package.json version and can be overridden with VITE_APP_VERSION and VITE_APP_BUILD_INFO when you need explicit deployed labels.
VITE_API_URL=http://your-backend-host:8000
Configuration workflow examples
- Local development: run
docker compose -f docker-compose.dev.yml up --build, then open the app and add monitoring machines in the Settings tab. - Production: export the required Compose variables in your shell, run
docker compose up --build, and manage local/remote machines from Settings. - Observability: Manage only deploys backend + frontend. It connects to existing Grafana/Prometheus/Alertmanager instances; see
docker-compose.observability.ymlfor an optional standalone example stack. A machine can belocal(the API host itself) orssh(a remote host), and the UI treats both the same after configuration.
In development, the Vite proxy handles /api requests automatically. Observability services (Grafana, Prometheus, Alertmanager) are configured in the app on the Services page — there are no observability env vars.