ani-web

Web front-end for anime streaming: search, browse, and stream anime in the browser via anidb.app. Multi-user, with per-user watch history and HLS playback proxied through the backend. Tuned for phone as much as desktop.

Quick start

uv venv .venv
uv pip install --python .venv/bin/python -r requirements.txt
.venv/bin/python -m server.users add <you>   # create your account (one-time)
./run.sh

Open it through your HTTPS proxy (or http://localhost:8321 from the host itself — browsers treat localhost as trusted). run.sh restarts cleanly if the server is already running; logs go to server.log. With ANIWEB_SECURE=1 (set by run.sh), the session cookie is Secure, so remote plain-HTTP access can't hold a session — only the HTTPS proxy works. A legacy credentials.json password, if any, is migrated to user admin on first start.

Account management (no self-signup by design):

.venv/bin/python -m server.users add <name>    # add user (prompted password)
.venv/bin/python -m server.users rm <name>     # remove user + their history
.venv/bin/python -m server.users list          # list users

Security: passwords are PBKDF2-SHA256 (210k iters, per-user salts) in server/data/aniweb.db (SQLite, 0600). Sessions are signed 30-day HttpOnly SameSite=Lax cookies; run.sh sets ANIWEB_SECURE=1 so cookies are Secure and only work through your HTTPS proxy. Accounts deleted via the app or CLI are rejected immediately, even with an old cookie.

Features

Accounts & watch history

Accounts are created from the CLI only — there is no signup screen, because the app is meant to sit behind your proxy on the open internet. Each user gets a fully isolated watch history (server/data/aniweb.db, SQLite): nothing is stored in the browser, so a new device picks up your exact watch state after login. Deleting an account (hamburger menu → delete, or server.users rm) kills its session cookies immediately and removes its history.

The history page shows every entry with poster, progress, and a per-entry delete button:

Home: continue watching

The home screen leads with a continue watching hero — the most recently watched episode with its poster, position, and a Resume button — followed by a recently played grid with progress bars and relative timestamps.

Search

The header search box queries anidb.app and shows results as a poster grid. Your last 8 searches (per user) appear in a dropdown under the box, filter live as you type, and click to re-run. Results open the detail view: synopsis, stats, season tabs, and filler badges.

Player

Playback is HLS through a backend proxy (/stream/{token}) — the video CDN sends no CORS headers, so the browser can't fetch it directly. The CDN serves a single quality (no ABR); the proxy pulls each segment across 16 parallel byte-range lanes (falling back to a single stream if the CDN refuses ranges), so a slow connection doesn't stall playback.

Resume — autoplay on open, resumes at the saved position; the position is saved every ~10s
Skip intro — MAL/Jikan intro timings (30-day cache) drive a "skip intro ⏭" pill while the intro window is on screen
Episode names — MAL titles (via keyless Jikan) in the episode tooltips and the "now playing" line
Buffering UI — spinner overlay, a buffer-ahead gauge under the video, and a CDN chip (live KB/s from /api/cdn, amber when the CDN is degraded)
Dub/sub toggle, playback speed (0.5–2×, remembered), and a hide fillers switch (fillers are badged and skipped by prev/next/auto-next)
Auto-next — when an episode ends, a 5-second countdown offers the next episode; Skip jumps straight to it, ✕ cancels
Watched state — completed episodes are dimmed with a ✓, the next unwatched one is highlighted
Failure overlay with a Retry button if a stream can't be played, plus loading/buffering indicators
Fast repeat navigation — upstream data is TTL-cached and HLS playlists/segments are LRU-cached, so re-opening a show or re-seeking is near-instant (the first load still pays the upstream round-trips)

Layout

server/   FastAPI app (app.py), anidb.app fetchers (upstream.py),
          accounts (users.py). upstream.py is the ONLY Cloudflare-facing code
static/   front-end: index.html, login.html, app.js, style.css, hls.min.js (vendored)
tests/    pytest suite: conftest.py (throwaway server), HTTP + browser tests
docs/img/  README screenshots
run.sh    launch/restart the server (sets ANIWEB_SECURE=1)
SPEC.md   design + the verified anidb.app data flow

Dev notes

anidb.app is behind Cloudflare; all upstream requests use curl_cffi Chrome TLS impersonation. If that ever stops working, everything is isolated in server/upstream.py.
The video CDN sends no CORS headers, so playback goes through the backend HLS proxy (/stream/{token}), which rewrites playlist URIs.
.venv/bin/python server/upstream.py runs a self-check of the fetchers (search → details → episodes → dub stream for Chainsaw Man).
A background probe fetches 64KB from the CDN every 3 min and logs state flips to server.log; GET /api/cdn (public) returns the latest throughput + ~1h history. Use it to check if "playback broken" is the CDN again.
The front-end is version-pinned: the server injects the git SHA as the ?v= cache-bust on app.js/style.css at startup (index.html itself is no-store), so a restart is a cache bump — nothing to hand-bump.
Mutations need the X-Aniweb: 1 header (CSRF: cross-site form POSTs can't set it), /login POST included — forced-login is dead.
Login throttling (server/auth.py): per-username 5 fails -> 15 min lock, plus a per-source-IP budget; both sliding windows, in-memory.
Playback failures self-report: the client posts a step timeline + capability fingerprint to /api/events (see the events table), so a broken browser is diagnosable from the server.
.venv/bin/pytest tests/ -q runs the test suite against a throwaway server (:8399, temp data dir — never touches the real data). The default suite (API + auth + dispatch tests) is hermetic and deterministic; the Playwright browser tests scrape and play LIVE upstream content, so they are opt-in: ANIWEB_LIVE_TESTS=1 .venv/bin/pytest tests/ -q (needs playwright chromium installed).
Episode titles are not available: anidb's episode API only returns {id, number, number2, filler}. Adding titles needs a free MyAnimeList API key.

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