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Implement Melora: *arr media arrival webhook announcer for Matrix

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Replace Bellhop scaffolding with full Melora implementation:
- FastAPI webhook endpoints for Radarr, Sonarr, and Lidarr
- matrix-nio integration with threaded room posting
- SQLite for thread root persistence and event deduplication
- Message formatting with plain text and HTML for each media type
- Shared secret authentication via X-Arr-Webhook-Secret header
- Updated dependencies, configuration, and documentation

https://claude.ai/code/session_01DuzWyMMXvLMB4VxEwJyV4X
This commit is contained in:
Claude
2026-02-28 07:38:07 +00:00
parent e6e47fd470
commit aaacd0b9bf
13 changed files with 557 additions and 222 deletions
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2
.dockerignore
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@@ -2,4 +2,4 @@
__pycache__
*.pyc
.env
bellhop.db
melora.db

32
.env.example
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# Matrix homeserver
MATRIX_HOMESERVER_URL=https://matrix.example.com
# Matrix audit bot (pre-authenticated)
MATRIX_AUDIT_ROOM_ID=!roomid:example.com
MATRIX_BOT_USER_ID=@bot:example.com
# Matrix bot (pre-authenticated)
MATRIX_BOT_USER_ID=@melora-bot:example.com
MATRIX_BOT_ACCESS_TOKEN=syt_bot_token_here
# Radarr
RADARR_URL=https://radarr.example.com
RADARR_API_KEY=your_radarr_api_key
RADARR_QUALITY_PROFILE_ID=1
RADARR_ROOT_FOLDER=/movies
# Matrix room for arrival announcements (unencrypted)
MATRIX_ARRIVALS_ROOM_ID=!roomid:example.com
# Sonarr
SONARR_URL=https://sonarr.example.com
SONARR_API_KEY=your_sonarr_api_key
SONARR_QUALITY_PROFILE_ID=1
SONARR_ROOT_FOLDER=/tv
# Shared secret for *arr webhook authentication
# Set the same value in each *arr instance under Settings → Connect → Webhook
WEBHOOK_SECRET=your_shared_secret_here
# Lidarr
LIDARR_URL=https://lidarr.example.com
LIDARR_API_KEY=your_lidarr_api_key
LIDARR_QUALITY_PROFILE_ID=1
LIDARR_ROOT_FOLDER=/music
# App
# SESSION_SECRET_KEY is auto-generated if omitted. A new key on every restart invalidates all sessions.
# SESSION_SECRET_KEY=
DATABASE_PATH=bellhop.db
# SQLite database path
DATABASE_PATH=melora.db

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__pycache__/
*.pyc
.env
bellhop.db
melora.db
*.sqlite
*.sqlite3

256
README.md
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# Bellhop
# Melora
A Matrix-authenticated web portal for submitting media requests to Radarr, Sonarr, and Lidarr. Users sign in with their Matrix homeserver credentials, search for movies, TV shows, or music, and submit requests — all through a clean single-page interface. Every request is logged to a Matrix room for auditing.
A webhook receiver that listens for media import events from Radarr, Sonarr, and Lidarr and announces new arrivals to a Matrix room via a bot. Each media type posts into its own persistent thread, keeping the room tidy.
## Architecture
```
Browser ──► FastAPI app ──► Matrix homeserver (authentication)
──► Radarr / Sonarr / Lidarr (search + add)
──► Matrix room (audit log)
──► SQLite (session storage)
Radarr ─┐
Sonarr ──┼─→ POST webhook → Melora (FastAPI) → Matrix room (threaded)
Lidarr ─┘
```
All *arr communication happens server-side. API keys and service URLs are never exposed to the browser.
No polling. All three *arr instances push events to Melora via their built-in webhook/Connect system.
## Requirements
- Python 3.12+
- A Matrix homeserver (Synapse, Dendrite, Conduit, etc.)
- At least one of: Radarr, Sonarr, or Lidarr accessible over HTTPS
- (Optional) A Matrix bot account for audit logging
- A Matrix homeserver with an unencrypted room and a bot account
- Radarr, Sonarr, and/or Lidarr instances configured to send webhooks
## Quick Start
### 1. Clone and configure
```bash
git clone https://github.com/prosolis/Bellhop.git
cd Bellhop
git clone https://github.com/prosolis/Melora.git
cd Melora
cp .env.example .env
```
@@ -39,228 +37,104 @@ pip install -r requirements.txt
uvicorn app.main:app --host 0.0.0.0 --port 8000
```
Open `http://localhost:8000` in your browser.
### 3. Run with Docker
```bash
docker build -t bellhop .
docker build -t melora .
docker run -d \
--name bellhop \
--name melora \
--env-file .env \
-p 8000:8000 \
-v bellhop-data:/app \
bellhop
-v melora-data:/app \
melora
```
The SQLite database file is created at the path specified by `DATABASE_PATH` (default: `bellhop.db` in the working directory). Mount a volume if you want persistence across container recreations.
## Environment Variables
Create a `.env` file in the project root (or pass variables via Docker `--env-file`). See `.env.example` for a template.
| Variable | Required | Default | Description |
|---|---|---|---|
| `MATRIX_HOMESERVER_URL` | Yes | — | Base URL of your Matrix homeserver |
| `MATRIX_BOT_USER_ID` | Yes | — | Bot's Matrix user ID (e.g. `@melora-bot:example.com`) |
| `MATRIX_BOT_ACCESS_TOKEN` | Yes | — | Pre-authenticated access token for the bot |
| `MATRIX_ARRIVALS_ROOM_ID` | Yes | — | Room ID for arrival announcements (e.g. `!abc123:example.com`) |
| `WEBHOOK_SECRET` | Yes | — | Shared secret for *arr webhook authentication |
| `DATABASE_PATH` | No | `melora.db` | Path to the SQLite database file |
### Required
## *arr Configuration
| Variable | Description |
|---|---|
| `MATRIX_HOMESERVER_URL` | Base URL of your Matrix homeserver (e.g. `https://matrix.example.com`) |
In each *arr instance, go to **Settings → Connect → Add → Webhook** and configure:
### *arr Services
- **URL**: `http://melora-host:8000/webhook/radarr` (or `/sonarr`, `/lidarr`)
- **Method**: `POST`
- **Events**: Enable **On Import** (and **On Upgrade** if desired)
- **Tags**: Leave blank to capture all imports
- **Headers**: Add `X-Arr-Webhook-Secret` with the same value as `WEBHOOK_SECRET`
Configure one or more. If a service's URL or API key is left empty, that media type will return a "not configured" error when used.
## Webhook Endpoints
| Variable | Default | Description |
|---|---|---|
| `RADARR_URL` | _(empty)_ | Radarr instance URL (e.g. `https://radarr.example.com`) |
| `RADARR_API_KEY` | _(empty)_ | Radarr API key (Settings > General in Radarr) |
| `RADARR_QUALITY_PROFILE_ID` | `1` | Quality profile ID to assign to new movies |
| `RADARR_ROOT_FOLDER` | `/movies` | Root folder path for movie storage |
| `SONARR_URL` | _(empty)_ | Sonarr instance URL |
| `SONARR_API_KEY` | _(empty)_ | Sonarr API key |
| `SONARR_QUALITY_PROFILE_ID` | `1` | Quality profile ID for new series |
| `SONARR_ROOT_FOLDER` | `/tv` | Root folder path for TV storage |
| `LIDARR_URL` | _(empty)_ | Lidarr instance URL |
| `LIDARR_API_KEY` | _(empty)_ | Lidarr API key |
| `LIDARR_QUALITY_PROFILE_ID` | `1` | Quality profile ID for new artists |
| `LIDARR_ROOT_FOLDER` | `/music` | Root folder path for music storage |
**Finding quality profile IDs:** Open your *arr instance, go to Settings > Profiles. The ID is visible in the URL when you click a profile, or query the API directly:
```bash
curl -H "X-Api-Key: YOUR_KEY" https://radarr.example.com/api/v3/qualityprofile
```
POST /webhook/radarr
POST /webhook/sonarr
POST /webhook/lidarr
GET /health
```
### Audit Bot (optional)
Each webhook endpoint validates the `X-Arr-Webhook-Secret` header, processes only `Download` events, and posts to the appropriate Matrix thread.
| Variable | Default | Description |
|---|---|---|
| `MATRIX_AUDIT_ROOM_ID` | _(empty)_ | Room ID for audit messages (e.g. `!abc123:example.com`) |
| `MATRIX_BOT_USER_ID` | _(empty)_ | Bot's Matrix user ID (e.g. `@bellhop-bot:example.com`) |
| `MATRIX_BOT_ACCESS_TOKEN` | _(empty)_ | Pre-authenticated access token for the bot |
## Matrix Room Structure
If any of these are left empty, audit logging is silently disabled. The room must be **unencrypted** and the bot must already be joined to it.
On first startup, Melora creates three thread root messages in the configured room. All subsequent announcements reply into the appropriate thread.
**Getting a bot access token:**
```bash
curl -X POST https://matrix.example.com/_matrix/client/v3/login \
-H "Content-Type: application/json" \
-d '{"type":"m.login.password","identifier":{"type":"m.id.user","user":"@bellhop-bot:example.com"},"password":"bot-password"}'
```
#new-arrivals:your.domain
├── 🎬 Movies ← Radarr imports
├── 📺 Shows ← Sonarr imports
└── 🎵 Music ← Lidarr imports
```
Copy the `access_token` from the response.
Thread root `event_id` values are stored in SQLite, so threads persist across restarts.
### Other
## Message Format
| Variable | Default | Description |
|---|---|---|
| `SESSION_SECRET_KEY` | _(auto-generated)_ | Secret for signing session cookies. Auto-generated at startup if not set. A new key is generated on every restart, which invalidates all existing sessions. |
| `DATABASE_PATH` | `bellhop.db` | Path to the SQLite database file |
Messages include both plain text and HTML (Matrix-flavored Markdown). New additions and quality upgrades are distinguished:
## API Reference
### Authentication
| Method | Path | Description |
|---|---|---|
| `POST` | `/auth/login` | Authenticate with Matrix credentials. Rate-limited to 5 requests/minute per IP. |
| `POST` | `/auth/logout` | Destroy the current session. |
| `GET` | `/auth/me` | Return the current user's Matrix ID, or 401 if not authenticated. |
**Login request body:**
```json
{
"username": "@user:example.com",
"password": "your-password"
}
**New movie:**
```
🎬 The Substance (2024)
✅ New addition
🎞️ Quality: Bluray-1080p
```
The username can be a full Matrix ID (`@user:example.com`) or a localpart (`user`) — the homeserver resolves it.
**Login response (200):**
```json
{
"user_id": "@user:example.com"
}
**Quality upgrade:**
```
A `bellhop_session` cookie is set automatically.
### Search
| Method | Path | Description |
|---|---|---|
| `GET` | `/search/movie?term=...` | Search Radarr for movies |
| `GET` | `/search/tv?term=...` | Search Sonarr for TV shows |
| `GET` | `/search/music?term=...` | Search Lidarr for artists |
All search endpoints require an active session (cookie). Results are capped at 25 items. Response fields are sanitized — only safe metadata (title, year, poster URL, IDs) is returned.
### Request
| Method | Path | Description |
|---|---|---|
| `POST` | `/request/movie` | Add a movie to Radarr |
| `POST` | `/request/tv` | Add a series to Sonarr |
| `POST` | `/request/music` | Add an artist to Lidarr |
**Movie request body:**
```json
{
"title": "Movie Title",
"tmdbId": 12345,
"year": 2024
}
🎬 The Substance (2024)
⬆️ Quality upgrade
🎞️ Quality: Bluray-2160p
```
**TV request body:**
```json
{
"title": "Show Title",
"tvdbId": 67890,
"year": 2024
}
```
**Music request body:**
```json
{
"artistName": "Artist Name",
"foreignArtistId": "mbid-uuid-here"
}
```
All items are added as monitored with "search on add" enabled. Quality profile and root folder are set from the corresponding environment variables.
**Success response (200):**
```json
{
"ok": true,
"message": "Movie added successfully"
}
```
### Frontend
| Method | Path | Description |
|---|---|---|
| `GET` | `/` | Serves the single-page Alpine.js frontend |
## Project Structure
```
Bellhop/
Melora/
├── app/
│ ├── __init__.py
│ ├── main.py # FastAPI app, lifespan, rate limiter, route mounting
│ ├── main.py # FastAPI app, lifespan, startup
│ ├── config.py # Environment variable loading
│ ├── database.py # Async SQLite session CRUD
│ ├── auth.py # /auth/* routes, session cookie management
│ ├── arr.py # /search/* and /request/* routes, *arr API proxying
│ ├── audit.py # Fire-and-forget Matrix room messaging
│ ├── static/ # Static assets (served at /static)
│ └── templates/
│ └── index.html # Alpine.js single-page frontend
│ ├── database.py # Async SQLite for thread roots and dedup
│ ├── matrix.py # matrix-nio posting and thread management
│ ├── formatters.py # Message formatting for each media type
│ └── webhooks.py # Webhook route handlers
├── Dockerfile
├── requirements.txt
├── .env.example
└── README.md
```
## Security
## Error Handling
- **Session cookies** are set with `httponly`, `samesite=strict`, and `secure` flags. The `secure` flag means cookies are only sent over HTTPS — use a reverse proxy with TLS in production.
- **Login rate limiting** — 5 attempts per minute per IP address via slowapi.
- **Token validation** — every protected route verifies the Matrix access token against the homeserver's `/_matrix/client/v3/account/whoami` endpoint. If the token has been revoked, the session is deleted immediately. If the homeserver is unreachable, the local session is trusted as a fallback.
- **No credential leakage** — *arr API keys, URLs, and internal IDs are never included in any response to the browser. Search results are mapped to a safe subset of fields before returning.
- **Sessions expire** after 7 days (cookie `max_age`).
### Production Recommendations
- Run behind a reverse proxy (nginx, Caddy, Traefik) with TLS termination so the `secure` cookie flag works.
- If you want sessions to persist across restarts, set `SESSION_SECRET_KEY` explicitly. Otherwise, all users are logged out on restart.
- Restrict network access to your *arr instances — only the Bellhop container needs to reach them.
- Use a dedicated Matrix bot account for audit logging rather than a personal account.
## How It Works
1. **User signs in** — the frontend POSTs Matrix credentials to `/auth/login`. The backend authenticates against the Matrix homeserver's Client-Server API (`m.login.password`), stores the resulting access token in SQLite, and returns a session cookie.
2. **User searches** — the frontend sends a search query to `/search/{type}`. The backend proxies the request to the appropriate *arr instance, strips internal fields, and returns sanitized results with poster URLs.
3. **User requests** — clicking "Request" on a result POSTs it to `/request/{type}`. The backend sends the add command to the *arr API with preconfigured quality profile and root folder. On success, an audit message is fired asynchronously to the configured Matrix room.
4. **Audit trail** — every successful request posts a message like `[REQUEST] @user:example.com → [Movie] "Title" (2024)` to the Matrix audit room. This is fire-and-forget — failures are logged but never block the user's request.
## Lidarr Notes
Lidarr uses MusicBrainz IDs (`foreignArtistId`) rather than TMDB/TVDB IDs. The lookup response includes this field and it is passed through directly to the add call. No independent MBID resolution is needed.
- Unknown or malformed payloads return 200 (prevents *arr retry storms)
- Parsing and Matrix posting errors are logged but don't crash the service
- Missing thread roots on startup halt with a clear error
## License

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app/__init__.py Normal file
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import os
from dotenv import load_dotenv
load_dotenv()
class Config:
MATRIX_HOMESERVER_URL: str = os.environ["MATRIX_HOMESERVER_URL"]
MATRIX_BOT_USER_ID: str = os.environ["MATRIX_BOT_USER_ID"]
MATRIX_BOT_ACCESS_TOKEN: str = os.environ["MATRIX_BOT_ACCESS_TOKEN"]
MATRIX_ARRIVALS_ROOM_ID: str = os.environ["MATRIX_ARRIVALS_ROOM_ID"]
WEBHOOK_SECRET: str = os.environ["WEBHOOK_SECRET"]
DATABASE_PATH: str = os.getenv("DATABASE_PATH", "melora.db")
config = Config()

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import aiosqlite
from app.config import config
_db: aiosqlite.Connection | None = None
async def get_db() -> aiosqlite.Connection:
global _db
if _db is None:
raise RuntimeError("Database not initialised — call init_db() first")
return _db
async def init_db() -> None:
global _db
_db = await aiosqlite.connect(config.DATABASE_PATH)
_db.row_factory = aiosqlite.Row
await _db.execute(
"""
CREATE TABLE IF NOT EXISTS thread_roots (
media_type TEXT PRIMARY KEY,
event_id TEXT NOT NULL,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)
"""
)
await _db.execute(
"""
CREATE TABLE IF NOT EXISTS posted_events (
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
media_type TEXT NOT NULL,
is_upgrade BOOLEAN NOT NULL,
posted_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)
"""
)
await _db.commit()
async def close_db() -> None:
global _db
if _db is not None:
await _db.close()
_db = None
async def get_thread_root(media_type: str) -> str | None:
db = await get_db()
cursor = await db.execute(
"SELECT event_id FROM thread_roots WHERE media_type = ?",
(media_type,),
)
row = await cursor.fetchone()
return row["event_id"] if row else None
async def set_thread_root(media_type: str, event_id: str) -> None:
db = await get_db()
await db.execute(
"INSERT OR REPLACE INTO thread_roots (media_type, event_id) VALUES (?, ?)",
(media_type, event_id),
)
await db.commit()
async def is_event_posted(event_key: str) -> bool:
db = await get_db()
cursor = await db.execute(
"SELECT 1 FROM posted_events WHERE id = ?",
(event_key,),
)
return await cursor.fetchone() is not None
async def record_posted_event(
event_key: str, title: str, media_type: str, is_upgrade: bool
) -> None:
db = await get_db()
await db.execute(
"INSERT OR IGNORE INTO posted_events (id, title, media_type, is_upgrade) VALUES (?, ?, ?, ?)",
(event_key, title, media_type, is_upgrade),
)
await db.commit()

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app/formatters.py Normal file
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import markdown as md
def _render_html(text: str) -> str:
return md.markdown(text, extensions=["extra"])
def _strip_markdown(text: str) -> str:
return text.replace("**", "").replace("*", "").replace("> ", "")
def format_radarr(payload: dict) -> tuple[str, str]:
movie = payload.get("movie", {})
title = movie.get("title", "Unknown")
year = movie.get("year", "")
is_upgrade = payload.get("isUpgrade", False)
quality = (
payload.get("movieFile", {})
.get("quality", {})
.get("quality", {})
.get("name", "Unknown")
)
if is_upgrade:
lines = [
f"\U0001f3ac **{title}** ({year})",
f"> \u2b06\ufe0f *Quality upgrade*",
f"> \U0001f39e\ufe0f Quality: {quality}",
]
else:
lines = [
f"\U0001f3ac **{title}** ({year})",
f"> \u2705 *New addition*",
f"> \U0001f39e\ufe0f Quality: {quality}",
]
body_md = "\n".join(lines)
plain = _strip_markdown(body_md)
html = _render_html(body_md)
return plain, html
def format_sonarr(payload: dict) -> tuple[str, str]:
series = payload.get("series", {})
series_title = series.get("title", "Unknown")
is_upgrade = payload.get("isUpgrade", False)
episodes = payload.get("episodes", [{}])
ep = episodes[0] if episodes else {}
season = ep.get("seasonNumber", 0)
episode = ep.get("episodeNumber", 0)
ep_title = ep.get("title", "")
quality = (
payload.get("episodeFile", {})
.get("quality", {})
.get("quality", {})
.get("name", "Unknown")
)
header = f"\U0001f4fa **{series_title}** \u2014 S{season:02d}E{episode:02d}"
if ep_title:
header += f" \u2014 *{ep_title}*"
if is_upgrade:
lines = [
header,
f"> \u2b06\ufe0f *Quality upgrade*",
f"> \U0001f39e\ufe0f Quality: {quality}",
]
else:
lines = [
header,
f"> \u2705 *New addition*",
f"> \U0001f39e\ufe0f Quality: {quality}",
]
body_md = "\n".join(lines)
plain = _strip_markdown(body_md)
html = _render_html(body_md)
return plain, html
def format_lidarr(payload: dict) -> tuple[str, str]:
artist = payload.get("artist", {})
artist_name = artist.get("name", "Unknown")
album = payload.get("album", {})
album_title = album.get("title", "")
is_upgrade = payload.get("isUpgrade", False)
track_files = payload.get("trackFiles", [{}])
tf = track_files[0] if track_files else {}
quality = (
tf.get("quality", {})
.get("quality", {})
.get("name", "Unknown")
)
header = f"\U0001f3b5 **{artist_name}**"
if album_title:
header += f" \u2014 *{album_title}*"
if is_upgrade:
lines = [
header,
f"> \u2b06\ufe0f *Quality upgrade*",
f"> \U0001f3b5 Format: {quality}",
]
else:
lines = [
header,
f"> \u2705 *New addition*",
f"> \U0001f3b5 Format: {quality}",
]
body_md = "\n".join(lines)
plain = _strip_markdown(body_md)
html = _render_html(body_md)
return plain, html

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import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI
from app.database import close_db, get_thread_root, init_db, set_thread_root
from app.matrix import THREAD_ROOT_MESSAGES, close_client, send_thread_root
from app.webhooks import router as webhook_router
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s %(levelname)s %(name)s: %(message)s",
)
log = logging.getLogger(__name__)
@asynccontextmanager
async def lifespan(app: FastAPI):
log.info("Starting Melora")
await init_db()
await _ensure_thread_roots()
log.info("Melora ready")
yield
log.info("Shutting down Melora")
await close_client()
await close_db()
async def _ensure_thread_roots() -> None:
for media_type in THREAD_ROOT_MESSAGES:
existing = await get_thread_root(media_type)
if existing:
log.info("Thread root for %s: %s", media_type, existing)
continue
log.info("Creating thread root for %s", media_type)
event_id = await send_thread_root(media_type)
await set_thread_root(media_type, event_id)
app = FastAPI(title="Melora", lifespan=lifespan)
app.include_router(webhook_router)
@app.get("/health")
async def health():
return {"status": "ok"}

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import logging
from nio import AsyncClient, RoomSendResponse
from app.config import config
log = logging.getLogger(__name__)
_client: AsyncClient | None = None
THREAD_ROOT_MESSAGES: dict[str, str] = {
"movies": "\U0001f3ac Movies",
"shows": "\U0001f4fa Shows",
"music": "\U0001f3b5 Music",
}
async def get_client() -> AsyncClient:
global _client
if _client is None:
_client = AsyncClient(config.MATRIX_HOMESERVER_URL)
_client.user_id = config.MATRIX_BOT_USER_ID
_client.access_token = config.MATRIX_BOT_ACCESS_TOKEN
return _client
async def close_client() -> None:
global _client
if _client is not None:
await _client.close()
_client = None
async def send_thread_root(media_type: str) -> str:
client = await get_client()
label = THREAD_ROOT_MESSAGES[media_type]
content = {
"msgtype": "m.text",
"body": label,
}
resp = await client.room_send(
config.MATRIX_ARRIVALS_ROOM_ID,
"m.room.message",
content,
)
if isinstance(resp, RoomSendResponse):
log.info("Created thread root for %s: %s", media_type, resp.event_id)
return resp.event_id
raise RuntimeError(f"Failed to create thread root for {media_type}: {resp}")
async def post_to_thread(
thread_root_event_id: str,
plain_body: str,
html_body: str,
) -> str | None:
client = await get_client()
content = {
"msgtype": "m.text",
"format": "org.matrix.custom.html",
"body": plain_body,
"formatted_body": html_body,
"m.relates_to": {
"rel_type": "m.thread",
"event_id": thread_root_event_id,
},
}
try:
resp = await client.room_send(
config.MATRIX_ARRIVALS_ROOM_ID,
"m.room.message",
content,
)
if isinstance(resp, RoomSendResponse):
return resp.event_id
log.error("Matrix send failed: %s", resp)
return None
except Exception:
log.exception("Matrix posting error")
return None

130
app/webhooks.py Normal file
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@@ -0,0 +1,130 @@
import logging
from fastapi import APIRouter, Header, Request, Response
from app.config import config
from app.database import get_thread_root, is_event_posted, record_posted_event
from app.formatters import format_lidarr, format_radarr, format_sonarr
from app.matrix import post_to_thread
log = logging.getLogger(__name__)
router = APIRouter(prefix="/webhook")
SOURCE_MAP = {
"radarr": {"media_type": "movies", "formatter": format_radarr, "id_field": "movie"},
"sonarr": {"media_type": "shows", "formatter": format_sonarr, "id_field": "series"},
"lidarr": {"media_type": "music", "formatter": format_lidarr, "id_field": "artist"},
}
def _validate_secret(header_value: str | None) -> bool:
return header_value == config.WEBHOOK_SECRET
def _extract_event_key(source: str, payload: dict) -> str | None:
if source == "radarr":
movie = payload.get("movie", {})
movie_id = movie.get("id")
if movie_id is not None:
return f"radarr-{movie_id}"
elif source == "sonarr":
episodes = payload.get("episodes", [])
if episodes:
ep_id = episodes[0].get("id")
if ep_id is not None:
return f"sonarr-{ep_id}"
elif source == "lidarr":
album = payload.get("album", {})
album_id = album.get("id")
if album_id is not None:
return f"lidarr-{album_id}"
return None
def _extract_title(source: str, payload: dict) -> str:
if source == "radarr":
return payload.get("movie", {}).get("title", "Unknown")
elif source == "sonarr":
return payload.get("series", {}).get("title", "Unknown")
elif source == "lidarr":
return payload.get("artist", {}).get("name", "Unknown")
return "Unknown"
async def _handle_webhook(source: str, payload: dict, secret: str | None) -> Response:
if not _validate_secret(secret):
return Response(status_code=401, content="Unauthorized")
event_type = payload.get("eventType", "")
if event_type != "Download":
log.debug("Ignoring %s event from %s", event_type, source)
return Response(status_code=200, content="OK")
info = SOURCE_MAP[source]
media_type = info["media_type"]
formatter = info["formatter"]
is_upgrade = payload.get("isUpgrade", False)
event_key = _extract_event_key(source, payload)
if event_key:
if await is_event_posted(event_key):
log.debug("Duplicate event %s, skipping", event_key)
return Response(status_code=200, content="OK")
try:
plain, html = formatter(payload)
except Exception:
log.exception("Failed to format %s payload", source)
return Response(status_code=200, content="OK")
thread_root_id = await get_thread_root(media_type)
if not thread_root_id:
log.error("No thread root for %s — cannot post", media_type)
return Response(status_code=200, content="OK")
event_id = await post_to_thread(thread_root_id, plain, html)
if event_id and event_key:
title = _extract_title(source, payload)
await record_posted_event(event_key, title, media_type, is_upgrade)
return Response(status_code=200, content="OK")
@router.post("/radarr")
async def webhook_radarr(
request: Request,
x_arr_webhook_secret: str | None = Header(None),
):
try:
payload = await request.json()
except Exception:
log.exception("Failed to parse Radarr payload")
return Response(status_code=200, content="OK")
return await _handle_webhook("radarr", payload, x_arr_webhook_secret)
@router.post("/sonarr")
async def webhook_sonarr(
request: Request,
x_arr_webhook_secret: str | None = Header(None),
):
try:
payload = await request.json()
except Exception:
log.exception("Failed to parse Sonarr payload")
return Response(status_code=200, content="OK")
return await _handle_webhook("sonarr", payload, x_arr_webhook_secret)
@router.post("/lidarr")
async def webhook_lidarr(
request: Request,
x_arr_webhook_secret: str | None = Header(None),
):
try:
payload = await request.json()
except Exception:
log.exception("Failed to parse Lidarr payload")
return Response(status_code=200, content="OK")
return await _handle_webhook("lidarr", payload, x_arr_webhook_secret)

5
requirements.txt
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@@ -1,9 +1,6 @@
fastapi==0.115.6
uvicorn[standard]==0.34.0
httpx==0.28.1
aiosqlite==0.20.0
python-dotenv==1.0.1
matrix-nio==0.24.0
slowapi==0.1.9
jinja2==3.1.5
itsdangerous==2.2.0
markdown==3.7