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, and personalized recommendations.

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, 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)
│   ├── download_manager.py      # Manages download queue, progress, parallel downloads
│   ├── favorites.py             # Favorites management system (JSON-based)
│   ├── recommendation_engine.py # Analyzes download history for recommendations
│   ├── recommendations.py       # Fetches latest releases from anime sources
│   └── kitsu_api.py             # Kitsu API integration for metadata
├── 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:

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

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

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

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

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.

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

Edit main.py to configure:

• max_parallel - Maximum concurrent downloads (default: 3)
• download_dir - Storage location (default: "downloads")

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