ohm_streaming/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Ohm Stream Downloader is a FastAPI-based web application for downloading anime episodes and media files from various file hosting services (1fichier, Doodstream, Rapidfile, Uptobox, VidMoly, SendVid, Sibnet, Lpayer) and anime streaming platforms (Anime-Sama, Neko-Sama, Anime-Ultime, Vostfree). It features a modern web interface, parallel downloads, pause/resume support, video streaming, personalized recommendations, and Sonarr webhook integration for automated downloads.

Development Commands

# Create and activate virtual environment
python3 -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

# Install dependencies
pip install -r requirements.txt

# Run development server (auto-reload)
uvicorn main:app --reload --host 0.0.0.0 --port 3000

# Access web interface
# Open http://localhost:3000/web in browser

# Run all tests
pytest

# Run tests with coverage report
pytest --cov=app --cov-report=html

# Run only unit tests (fast, isolated)
pytest -m "unit"

# Run only integration tests
pytest -m "integration"

# Exclude slow tests
pytest -m "not slow"

# Verbose output
pytest -v

# Show print debugging
pytest -s

Architecture

Directory Structure:

Ohm_streaming/
├── main.py                      # FastAPI application & API endpoints
├── app/
│   ├── models/                  # Pydantic models (DownloadTask, AnimeMetadata, Sonarr, etc.)
│   ├── downloaders/             # Host-specific downloaders
│   │   ├── base.py              # BaseDownloader abstract class
│   │   ├── unfichier.py         # 1fichier.com handler
│   │   ├── doodstream.py        # Doodstream handler
│   │   ├── rapidfile.py         # Rapidfile handler
│   │   ├── uptobox.py           # Uptobox handler
│   │   ├── vidmoly.py           # VidMoly handler
│   │   ├── sendvid.py           # SendVid handler
│   │   ├── sibnet.py            # Sibnet handler
│   │   ├── lpayer.py            # Lpayer handler
│   │   ├── vidmoly_old.py       # Old VidMoly implementation (deprecated)
│   │   ├── animesama.py         # Anime-Sama (anime provider)
│   │   ├── animeultime.py       # Anime-Ultime (anime provider)
│   │   ├── nekosama.py          # Neko-Sama (anime provider)
│   │   ├── vostfree.py          # Vostfree (anime provider)
│   │   └── __init__.py          # Factory function and registry
│   ├── providers.py             # Provider configuration (domains, icons, colors)
│   ├── config.py                # Environment-based configuration (Pydantic Settings)
│   ├── utils.py                 # Security utilities (sanitize_filename, is_safe_filename)
│   ├── download_manager.py      # Manages download queue, progress, parallel downloads
│   ├── favorites.py             # Favorites management system (JSON-based)
│   ├── recommendation_engine.py # Analyzes download history for personalized recommendations
│   ├── recommendations.py       # Fetches latest releases from anime sources
│   ├── kitsu_api.py             # Kitsu API integration for anime metadata
│   ├── sonarr_handler.py        # Sonarr webhook integration handler
│   └── models/
│       ├── __init__.py          # Core models (DownloadTask, AnimeMetadata, etc.)
│       └── sonarr.py            # Sonarr Pydantic models
├── downloads/                   # Downloaded files storage
├── templates/
│   ├── index.html               # Main web interface
│   ├── player.html              # Video player page
│   └── base.html                # Base template
├── static/                      # Static assets (CSS, JS, images)
└── tests/                       # Test suite with fixtures

Core Components:

0. Configuration (app/config.py)

• Settings class using Pydantic Settings for environment-based configuration
• Loads from .env file with sensible defaults
• Provides get_settings() function for accessing configuration globally

1. DownloadManager (app/download_manager.py)

• Manages all download tasks with parallel download limit (default: 3 concurrent)
• Handles pause/resume/cancel operations
• Tracks progress, speed, and file chunks for resume support
• Uses asyncio.Semaphore to limit concurrent downloads
• Auto-restores completed downloads from disk on server startup

2. Downloaders (app/downloaders/)

Factory Pattern:

• get_downloader(url) in __init__.py selects appropriate downloader
• Each downloader inherits from BaseDownloader abstract class
• Order matters: anime providers checked first, then file hosts
• Falls back to GenericDownloader if no match

BaseDownloader Interface:

• can_handle(url) - Check if downloader supports the URL
• get_download_link(url) - Extract direct download link and filename
• search_anime(query, lang) - Search anime (anime providers only)
• get_episodes(anime_url, lang) - Get episode list (anime providers only)
• get_anime_metadata(anime_url) - Get metadata dict (anime providers only) - Note: not in base.py, implemented by anime providers

Key Patterns:

• All downloaders use httpx.AsyncClient for HTTP requests
• BeautifulSoup with lxml for HTML parsing
• Async/await throughout for non-blocking I/O
• Fuzzy search using jieba for Chinese text segmentation and typo tolerance

3. Provider Configuration (app/providers.py)

• ANIME_PROVIDERS - Anime streaming sites configuration
• FILE_HOSTS - File hosting services configuration
• Each provider has: name, domains, icon, color, url_pattern
• detect_provider_from_url(url) - Identify provider from URL

4. API Endpoints

Download Management:

• POST /api/download - Create new download task
• GET /api/downloads - List all download tasks
• GET /api/download/{task_id} - Get task details
• POST /api/download/{task_id}/pause - Pause download
• POST /api/download/{task_id}/resume - Resume download
• DELETE /api/download/{task_id} - Delete task (keeps completed files)
• GET /api/download/{task_id}/file - Download completed file

Anime Features:

• GET /api/anime/search - Unified search across all providers
• GET /api/anime/metadata - Get anime metadata
• GET /api/anime/episodes - Get episode list
• POST /api/anime/download - Download single episode
• POST /api/anime/download-season - Download entire season

Video Streaming:

• GET /video/{task_id} - Stream video with Range support
• GET /stream/{filename} - Stream by filename
• GET /player/{task_id} - Video player page
• GET /watch/{filename} - Player by filename

Recommendations & Favorites:

• GET /api/recommendations - Personalized recommendations
• GET /api/releases/latest - Latest anime releases
• GET /api/favorites - List favorites
• POST /api/favorites - Add favorite
• DELETE /api/favorites/{anime_id} - Remove favorite

Sonarr Integration:

• POST /api/webhook/sonarr - Receive Sonarr webhooks
• GET /api/sonarr/config - Get Sonarr configuration
• PUT /api/sonarr/config - Update Sonarr configuration
• GET /api/sonarr/mappings - List Sonarr to anime mappings
• POST /api/sonarr/mappings - Create/update mapping
• DELETE /api/sonarr/mappings/{series_id} - Delete mapping
• GET /api/sonarr/search - Search anime for mapping
• GET /api/sonarr/episodes - Get episode list
• GET /api/sonarr/suggest - Suggest anime matches
• POST /api/sonarr/download - Manually trigger download

5. Web Interface

• Single-page app at /web (templates/index.html)
• Auto-refreshes every second to show progress
• Video player with seeking support (HTTP Range headers)
• Dark theme with gradients and animations

6. Security Utilities (app/utils.py)

• sanitize_filename(filename, max_length=255) - Sanitize filenames to prevent path traversal
  • Removes dangerous characters: \ / : * ? " < > |
  • Strips path separators and leading dots/dashes
  • Limits filename length while preserving extension
• is_safe_filename(filename) - Validate filename safety
  • Checks for path traversal patterns (.., /, \)
  • Detects absolute paths and drive letters
  • Used throughout the codebase for file operations

7. Recommendation Engine (app/recommendation_engine.py)

• Analyzes download history to generate personalized recommendations
• Tracks genre preferences and viewing patterns
• Scores anime based on user's download history
• Used by /api/recommendations endpoint

8. Kitsu API (app/kitsu_api.py)

• Integrates with Kitsu anime database for metadata
• Fetches anime information by title or ID
• Provides enriched metadata (synopsis, genres, ratings, poster images)
• Used as fallback when provider metadata is incomplete

9. Pydantic Models (app/models/)

• __init__.py - Core models:
  • DownloadStatus - Enum for task states (PENDING, DOWNLOADING, PAUSED, COMPLETED, FAILED, CANCELLED)
  • HostType - Enum for file host types (RAPIDFILE, UNFICHIER, DOODSTREAM, OTHER)
  • DownloadTask - Main task model with progress tracking
  • DownloadRequest - Request model for creating downloads
  • AnimeMetadata - Anime information (synopsis, genres, rating, release_year, studio, etc.)
  • AnimeSearchResult - Enhanced search result with metadata
• sonarr.py - Sonarr-specific models:
  • SonarrWebhookPayload - Complete webhook payload schema
  • SonarrEventType - Enum for event types (Grab, Download, Rename, Delete, Test)
  • SonarrMapping - Mapping between Sonarr series and anime providers
  • SonarrConfig - Webhook configuration (enabled, secret, auto-download, etc.)

Test Structure

Test Organization (tests/):

• conftest.py - Pytest configuration and fixtures
• test_models.py - Pydantic model tests
• test_downloaders.py - Downloader tests
• test_download_manager.py - DownloadManager tests
• test_favorites.py - Favorites system tests
• test_api.py - FastAPI endpoint tests
• test_sonarr.py - Sonarr integration tests
• test_anime_sama_seasons.py - Anime-Sama season handling tests
• test_translate_api.py - Translation API tests
• test_delete_and_restore.py - Delete and restore functionality tests

Fixtures in conftest.py:

• temp_dir - Temporary directory
• temp_download_dir - Temporary download directory
• download_manager - DownloadManager instance
• favorites_manager - FavoritesManager instance
• mock_httpx_client - Mock for httpx.AsyncClient
• sample_download_task - Sample task data
• sample_anime_metadata - Sample metadata

Test Markers:

• unit - Unit tests (isolated, fast) - auto-applied
• integration - Integration tests (API endpoints) - auto-applied
• asyncio - Async tests - auto-applied
• slow - Slow tests - manual
• network - Requires network - manual

pytest.ini Configuration:

• Auto-applies markers for async and integration tests
• Coverage enabled by default (--cov=app)
• HTML coverage report generated in htmlcov/
• Verbose output with local variables in tracebacks
• 300-second timeout for tests
• asyncio_mode = auto for async test support

Running Single Test:

# Run specific test file
pytest tests/test_sonarr.py -v

# Run specific test class
pytest tests/test_sonarr.py::TestSonarrHandler -v

# Run specific test
pytest tests/test_sonarr.py::TestSonarrHandler::test_add_mapping -v

Adding New Host Support

To add support for a new file hosting service:

1. Create new file in app/downloaders/ (e.g., myhost.py)
2. Inherit from BaseDownloader
3. Implement required methods
4. Add to imports in app/downloaders/__init__.py
5. Add to downloaders list in get_downloader()
6. Add configuration to FILE_HOSTS in app/providers.py

Example:

from .base import BaseDownloader
from bs4 import BeautifulSoup

class MyHostDownloader(BaseDownloader):
    def can_handle(self, url: str) -> bool:
        return "myhost.com" in url.lower()

    async def get_download_link(self, url: str) -> tuple[str, str]:
        soup = BeautifulSoup(await self._fetch_page(url), 'lxml')
        # ... extraction logic ...
        return download_url, filename

    def close(self):
        # IMPORTANT: Always close the HTTP client
        await self.client.aclose()

Important:

• Always close the HTTP client in your downloader to avoid resource leaks
• Use sanitize_filename() from app.utils when extracting filenames from URLs
• Use is_safe_filename() to validate filenames before file operations

Sonarr Integration

The application includes full Sonarr webhook support for automated anime downloads.

Architecture

SonarrHandler (app/sonarr_handler.py):

• Processes incoming webhooks from Sonarr
• Manages series mappings (Sonarr TVDB ID → Anime Provider URL)
• Supports HMAC SHA256 signature verification for security
• Auto-triggers downloads on Grab events
• Provides search and suggestion APIs for mapping setup

Sonarr Models (app/models/sonarr.py):

• SonarrWebhookPayload - Complete webhook payload schema
• SonarrEventType - Enum for event types (Grab, Download, Rename, Delete, Test)
• SonarrMapping - Mapping between Sonarr series and anime providers
• SonarrConfig - Webhook configuration (enabled, secret, auto-download, etc.)

Workflow

1. Setup in Sonarr:

   • Configure webhook: Settings > Connect > Sonarr > Webhook
   • URL: http://your-server:3000/api/webhook/sonarr
   • Enable "Grab" event

2. Create Mappings:

   • Get Sonarr series TVDB ID from series details
   • Search anime: GET /api/sonarr/search?q={title}
   • Create mapping: POST /api/sonarr/mappings

3. Automatic Download:

   • Sonarr grabs new episode → Sends webhook
   • Ohm Stream Downloader receives webhook
   • Looks up mapping by TVDB ID
   • Finds matching episode on anime provider
   • Creates and starts download task

Configuration Files

• config/sonarr.json - Webhook configuration
• config/sonarr_mappings.json - Series mappings

Example Mapping

{
  "sonarr_series_id": 79644,
  "sonarr_title": "Naruto Shippuden",
  "anime_provider": "anime-sama",
  "anime_url": "https://anime-sama.si/catalogue/naruto-shippuden/saison1/vostfr/",
  "anime_title": "Naruto Shippuden",
  "lang": "vostfr",
  "quality_preference": "1080p",
  "auto_download": true
}

Security

• Optional HMAC SHA256 signature verification
• Configure secret in both Sonarr and Ohm Stream Downloader
• Enable with verify_hmac: true in config

Testing

• Test endpoint: POST /api/webhook/test/sonarr
• Manual trigger: POST /api/sonarr/download
• Get suggestions: GET /api/sonarr/suggest?sonarr_title={title}

Documentation: See docs/SONARR_INTEGRATION.md for complete setup guide.

Adding New Anime Provider

To add a new anime streaming provider:

1. Create downloader inheriting from BaseDownloader
2. Implement anime-specific methods:
   • search_anime(query, lang) - Return list of anime with title, url, cover_image
   • get_episodes(anime_url, lang) - Return list of episodes
   • get_anime_metadata(anime_url) - Return metadata dict
3. Add to ANIME_PROVIDERS in app/providers.py
4. Add to factory in app/downloaders/__init__.py
5. Update main.py to include in unified search

Metadata should include:

• synopsis, genres, rating, release_year, studio, poster_image, total_episodes, status

Configuration

The application uses environment variables for configuration via app/config.py (Pydantic Settings).

Environment Variables (.env):

# Copy the example file
cp .env.example .env

# Edit .env to configure:
APP_NAME=Ohm Stream Downloader      # Application name
DEBUG=false                          # Debug mode
HOST=0.0.0.0                        # Server host
PORT=3000                           # Server port
DOWNLOAD_DIR=downloads              # Download storage location
MAX_PARALLEL_DOWNLOADS=3            # Maximum concurrent downloads
CHUNK_SIZE=1048576                  # Download chunk size (1MB)
CORS_ORIGINS=...                    # Comma-separated allowed origins
HTTP_TIMEOUT=10.0                   # HTTP request timeout (seconds)
DOWNLOAD_TIMEOUT=300                # Download timeout (seconds)
LOG_LEVEL=INFO                      # Logging level

Configuration Files:

• .env - Environment configuration (create from .env.example)
• config/sonarr.json - Sonarr webhook configuration (created automatically)
• config/sonarr_mappings.json - Sonarr to anime provider mappings (created automatically)
• config/.gitkeep - Ensures config directory is tracked in git
• Example files: config/sonarr.example.json, config/sonarr_mappings.example.json

Documentation:

• README.md - User-facing features and roadmap
• CLAUDE.md - This file (developer guide)
• docs/SONARR_INTEGRATION.md - Complete Sonarr setup guide
• docs/SONARR_IMPLEMENTATION.md - Technical implementation summary

Key Implementation Details

Resume Support:

• Downloads use HTTP Range headers to resume from last byte
• Files downloaded in 1MB chunks
• Partial files cleaned up on cancel
• Resume position tracked in downloaded_bytes field

Domain Handling:

• Anime providers use dynamic domain detection (e.g., Anime-Sama fetches current domain from anime-sama.pw)
• Multiple domains per provider supported in configuration
• Domain detection via detect_provider_from_url(url) in providers.py

Task Lifecycle:

• PENDING → DOWNLOADING → PAUSED / COMPLETED / CANCELLED / FAILED
• Active downloads tracked in active_downloads dict
• All tasks stored in tasks dict with UUID keys
• Completed files preserved when deleting tasks (only partial files removed)

Video Streaming:

• Range header support for seeking in video player
• Serves from /downloads directory via StaticFiles
• Video extensions: .mp4, .mkv, .avi, .mov, .wmv, .flv, .webm

Error Handling:

• Graceful degradation with status tracking
• Network errors caught and reported in task status
• Automatic retry on resume
• Downloads > 1MB considered complete to skip small error files

Dependencies

Core:

• fastapi - Web framework
• uvicorn - ASGI server
• httpx - Async HTTP client
• beautifulsoup4, lxml - HTML parsing
• aiofiles - Async file operations
• jieba - Chinese text segmentation for fuzzy search

Testing:

• pytest - Test framework
• pytest-asyncio - Async test support
• pytest-cov - Coverage reporting
• pytest-mock - Mocking support