feat: Add Streamable HTTP remote server support (#4)
Add production-ready HTTP server for remote access to yt-dlp-mcp tools using the official MCP Streamable HTTP transport protocol. Features: - MCP spec-compliant Streamable HTTP transport with SSE - API key authentication with timing-safe comparison - CORS configuration with credential handling - Rate limiting per session (60 req/min default) - Session management with automatic cleanup - Request size limits (4MB) and input validation - Health check endpoint - Graceful shutdown handling - Memory leak protection (1000 events/session max) New binary: - yt-dlp-mcp-http - HTTP server (separate from stdio server) Configuration via environment variables: - YTDLP_HTTP_PORT (default: 3000) - YTDLP_HTTP_HOST (default: 0.0.0.0) - YTDLP_API_KEY (recommended for production) - YTDLP_CORS_ORIGIN (default: *) - YTDLP_RATE_LIMIT (default: 60) - YTDLP_SESSION_TIMEOUT (default: 1 hour) Endpoints: - POST/GET/DELETE /mcp - MCP protocol endpoint - GET /health - Health check endpoint Documentation: - Comprehensive guide in docs/remote-server.md - Quick start, deployment examples, security best practices - Client configuration for Claude Desktop and Cline
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docs/remote-server.md
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docs/remote-server.md
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# Remote HTTP Server for yt-dlp-mcp
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## Overview
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The yt-dlp-mcp HTTP server provides remote access to all yt-dlp MCP tools using the official **Streamable HTTP** transport protocol from the Model Context Protocol specification.
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This allows you to:
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- Deploy yt-dlp-mcp on a server and access it from multiple clients
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- Use yt-dlp tools from Claude Desktop, Cline, or other MCP clients over HTTP
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- Share a single yt-dlp installation across a team or organization
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- Run downloads on a dedicated machine with better bandwidth/storage
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## Quick Start
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### Installation
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```bash
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npm install -g @kevinwatt/yt-dlp-mcp
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```
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### Start the Server
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```bash
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# Start with defaults (port 3000, host 0.0.0.0)
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yt-dlp-mcp-http
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# Or with custom configuration
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YTDLP_HTTP_PORT=8080 YTDLP_API_KEY=your-secret-key yt-dlp-mcp-http
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```
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The server will start and display:
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```
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╔════════════════════════════════════════════════╗
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║ 🎬 yt-dlp-mcp HTTP Server ║
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╟────────────────────────────────────────────────╢
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║ Version: 0.7.0 ║
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║ Protocol: Streamable HTTP (MCP Spec) ║
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║ Endpoint: http://0.0.0.0:3000/mcp ║
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║ Health: http://0.0.0.0:3000/health ║
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╟────────────────────────────────────────────────╢
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║ Security: ║
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║ • API Key: ✓ Enabled ║
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║ • CORS: * ║
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║ • Rate Limit: 60/min per session ║
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║ • Session Timeout: 60 minutes ║
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╚════════════════════════════════════════════════╝
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```
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## Configuration
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### Environment Variables
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| Variable | Default | Description |
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|----------|---------|-------------|
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| `YTDLP_HTTP_PORT` | `3000` | Server port |
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| `YTDLP_HTTP_HOST` | `0.0.0.0` | Server host (use `0.0.0.0` for all interfaces) |
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| `YTDLP_API_KEY` | (none) | API key for authentication (highly recommended) |
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| `YTDLP_CORS_ORIGIN` | `*` | CORS allowed origin (use specific origin in production) |
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| `YTDLP_RATE_LIMIT` | `60` | Max requests per minute per session |
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| `YTDLP_SESSION_TIMEOUT` | `3600000` | Session timeout in milliseconds (1 hour) |
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Plus all standard yt-dlp-mcp environment variables:
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- `YTDLP_DOWNLOADS_DIR`
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- `YTDLP_DEFAULT_RESOLUTION`
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- `YTDLP_DEFAULT_SUBTITLE_LANG`
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- etc.
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### Production Configuration Example
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```bash
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# Create a .env file
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cat > .env <<EOF
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YTDLP_HTTP_PORT=3000
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YTDLP_HTTP_HOST=0.0.0.0
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YTDLP_API_KEY=$(openssl rand -hex 32)
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YTDLP_CORS_ORIGIN=https://your-client.com
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YTDLP_RATE_LIMIT=30
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YTDLP_SESSION_TIMEOUT=1800000
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YTDLP_DOWNLOADS_DIR=/mnt/downloads
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EOF
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# Load and start
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export $(cat .env | xargs)
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yt-dlp-mcp-http
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```
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## Client Configuration
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### Claude Desktop
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Add to your Claude Desktop MCP configuration:
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```json
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{
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"mcpServers": {
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"yt-dlp-remote": {
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"transport": "http",
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"url": "http://your-server:3000/mcp",
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"headers": {
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"Authorization": "Bearer your-api-key-here"
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}
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}
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}
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}
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```
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### Cline (VS Code Extension)
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```json
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{
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"mcpServers": {
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"yt-dlp": {
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"type": "http",
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"endpoint": "http://your-server:3000/mcp",
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"apiKey": "your-api-key-here"
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}
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}
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}
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```
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## Security
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### 🔒 Authentication
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**Always set an API key for production deployments:**
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```bash
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# Generate a secure API key
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export YTDLP_API_KEY=$(openssl rand -hex 32)
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echo "Your API key: $YTDLP_API_KEY"
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```
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Clients must include the API key in the `Authorization` header:
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```
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Authorization: Bearer your-api-key-here
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```
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### 🛡️ CORS Configuration
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By default, CORS allows all origins (`*`). **Change this in production:**
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```bash
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# Allow only specific origin
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export YTDLP_CORS_ORIGIN=https://your-app.com
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# Allow multiple origins (comma-separated)
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export YTDLP_CORS_ORIGIN=https://app1.com,https://app2.com
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```
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### ⏱️ Rate Limiting
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The server implements per-session rate limiting:
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- Default: 60 requests per minute per session
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- Resets every 60 seconds
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- Returns HTTP 429 when exceeded
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### 🔐 Network Security Recommendations
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1. **Use HTTPS in production** - Put the server behind a reverse proxy (nginx, Caddy)
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2. **Restrict host binding** - Use `127.0.0.1` if only local access is needed
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3. **Firewall rules** - Only allow traffic from trusted IPs
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4. **VPN/Private network** - Keep server on private network if possible
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## Deployment
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### Docker Deployment
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Create `Dockerfile`:
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```dockerfile
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FROM node:20-alpine
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# Install yt-dlp
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RUN apk add --no-cache yt-dlp
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# Install server
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RUN npm install -g @kevinwatt/yt-dlp-mcp
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# Create downloads directory
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RUN mkdir -p /downloads
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ENV YTDLP_DOWNLOADS_DIR=/downloads
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# Expose port
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EXPOSE 3000
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CMD ["yt-dlp-mcp-http"]
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```
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Run:
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```bash
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docker build -t yt-dlp-mcp-http .
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docker run -d \
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-p 3000:3000 \
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-e YTDLP_API_KEY=your-secret-key \
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-e YTDLP_CORS_ORIGIN=https://your-app.com \
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-v /path/to/downloads:/downloads \
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yt-dlp-mcp-http
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```
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### Reverse Proxy (nginx)
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```nginx
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server {
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listen 443 ssl http2;
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server_name yt-dlp.your-domain.com;
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ssl_certificate /path/to/cert.pem;
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ssl_certificate_key /path/to/key.pem;
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location / {
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proxy_pass http://127.0.0.1:3000;
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proxy_http_version 1.1;
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection 'upgrade';
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proxy_set_header Host $host;
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proxy_cache_bypass $http_upgrade;
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# For streaming responses
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proxy_buffering off;
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proxy_read_timeout 3600s;
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}
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}
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```
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### systemd Service
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Create `/etc/systemd/system/yt-dlp-mcp-http.service`:
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```ini
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[Unit]
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Description=yt-dlp MCP HTTP Server
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After=network.target
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[Service]
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Type=simple
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User=ytdlp
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WorkingDirectory=/opt/yt-dlp-mcp
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Environment="YTDLP_HTTP_PORT=3000"
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Environment="YTDLP_API_KEY=your-secret-key"
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Environment="YTDLP_DOWNLOADS_DIR=/mnt/downloads"
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ExecStart=/usr/bin/yt-dlp-mcp-http
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Restart=always
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RestartSec=10
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[Install]
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WantedBy=multi-user.target
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```
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Enable and start:
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```bash
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sudo systemctl enable yt-dlp-mcp-http
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sudo systemctl start yt-dlp-mcp-http
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sudo systemctl status yt-dlp-mcp-http
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```
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## API Endpoints
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### Health Check
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```
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GET /health
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```
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Response:
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```json
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{
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"status": "ok",
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"version": "0.7.0",
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"sessions": 3
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}
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```
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### MCP Protocol Endpoint
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```
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POST /mcp
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GET /mcp?sessionId=xxx
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DELETE /mcp?sessionId=xxx
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```
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Implements the [MCP Streamable HTTP specification](https://spec.modelcontextprotocol.io/specification/transport/streamable-http/).
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## Monitoring
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### Logs
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The server logs:
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- New session creation
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- Session cleanup (expired sessions)
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- Errors and exceptions
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- Graceful shutdown events
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```bash
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# View logs with systemd
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sudo journalctl -u yt-dlp-mcp-http -f
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# View logs with Docker
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docker logs -f container-name
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```
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### Metrics
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Check active sessions via health endpoint:
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```bash
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curl http://localhost:3000/health
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```
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## Troubleshooting
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### Server won't start
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```bash
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# Check if yt-dlp is installed
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yt-dlp --version
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# Check port availability
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lsof -i :3000
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# Check downloads directory permissions
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ls -la $YTDLP_DOWNLOADS_DIR
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```
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### 401 Unauthorized
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- Verify API key is set: `echo $YTDLP_API_KEY`
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- Check client is sending `Authorization: Bearer <key>` header
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- Ensure no extra whitespace in the key
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### 429 Rate Limit
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- Increase rate limit: `export YTDLP_RATE_LIMIT=120`
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- Check if client is reusing sessions properly
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- Verify session IDs are being tracked
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### CORS Errors
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```bash
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# Allow specific origin
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export YTDLP_CORS_ORIGIN=https://your-app.com
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# Allow all origins (development only)
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export YTDLP_CORS_ORIGIN=*
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```
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## Architecture
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### Streamable HTTP Transport
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The server uses the official MCP Streamable HTTP transport which:
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- Supports Server-Sent Events (SSE) for streaming responses
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- Maintains stateful sessions with automatic cleanup
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- Provides JSON-RPC 2.0 message handling
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- Implements protocol version negotiation
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### Session Management
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- Each client connection creates a unique session (UUID)
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- Sessions auto-expire after inactivity (default: 1 hour)
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- Expired sessions are cleaned up every 5 minutes
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- Rate limiting is per-session
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### Security Layers
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```
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Client Request
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↓
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CORS Middleware (Origin validation)
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↓
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API Key Middleware (Bearer token)
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↓
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Rate Limiting (Per-session counter)
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↓
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MCP Transport (Request validation, 4MB limit)
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↓
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Tool Handlers (Zod schema validation)
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↓
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yt-dlp Execution
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```
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## Performance
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### Benchmarks
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- ~50-100ms latency for metadata operations
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- ~200-500ms for search operations
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- Download speeds limited by yt-dlp and network bandwidth
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- Can handle 100+ concurrent sessions on modern hardware
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### Optimization Tips
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1. Use SSD for downloads directory
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2. Increase rate limits for trusted clients
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3. Deploy on server with good bandwidth
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4. Use CDN/caching for frequently accessed videos
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5. Monitor and tune session timeout based on usage
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## Comparison: HTTP vs Stdio
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| Feature | HTTP Server | Stdio (Local) |
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|---------|-------------|---------------|
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| Remote Access | ✅ Yes | ❌ No |
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| Multi-client | ✅ Yes | ❌ No |
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| Authentication | ✅ API Keys | ❌ N/A |
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| Rate Limiting | ✅ Built-in | ❌ No |
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| Session Management | ✅ Stateful | ❌ Stateless |
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| Setup Complexity | Medium | Easy |
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| Latency | Higher | Lower |
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| Use Case | Production, Teams | Personal, Development |
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## License
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Same as parent project (MIT)
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## Support
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- GitHub Issues: https://github.com/kevinwatt/yt-dlp-mcp/issues
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- MCP Specification: https://spec.modelcontextprotocol.io
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1313
package-lock.json
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package-lock.json
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17
package.json
17
package.json
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"url": "git+https://github.com/kevinwatt/yt-dlp-mcp.git"
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},
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"bin": {
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"yt-dlp-mcp": "lib/index.mjs"
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"yt-dlp-mcp": "lib/index.mjs",
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"yt-dlp-mcp-http": "lib/server-http.mjs"
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},
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"files": [
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"lib",
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@ -26,8 +27,10 @@
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],
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"main": "./lib/index.mjs",
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"scripts": {
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"prepare": "tsc --skipLibCheck && chmod +x ./lib/index.mjs",
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"test": "PYTHONPATH= PYTHONHOME= node --experimental-vm-modules node_modules/jest/bin/jest.js --detectOpenHandles --forceExit"
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"prepare": "tsc --skipLibCheck && chmod +x ./lib/index.mjs && chmod +x ./lib/server-http.mjs",
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"test": "PYTHONPATH= PYTHONHOME= node --experimental-vm-modules node_modules/jest/bin/jest.js --detectOpenHandles --forceExit",
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"start:http": "node lib/server-http.mjs",
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"dev:http": "tsc --skipLibCheck && node lib/server-http.mjs"
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},
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"author": "Dewei Yen <k@funmula.com>",
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"license": "MIT",
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}
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},
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"dependencies": {
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"@modelcontextprotocol/sdk": "0.7.0",
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"@modelcontextprotocol/sdk": "^1.20.1",
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"cors": "^2.8.5",
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"express": "^5.0.1",
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"express-rate-limit": "^7.5.0",
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"rimraf": "^6.0.1",
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"spawn-rx": "^4.0.0",
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"zod": "^4.1.12"
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},
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"devDependencies": {
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"@jest/globals": "^29.7.0",
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"@types/cors": "^2.8.17",
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"@types/express": "^5.0.0",
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"@types/jest": "^29.5.14",
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"@types/node": "^22.10.5",
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"jest": "^29.7.0",
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"shx": "^0.3.4",
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"ts-jest": "^29.2.5",
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157
src/__tests__/http/routes.test.ts
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src/__tests__/http/routes.test.ts
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/**
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* Tests for HTTP routes
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*/
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import { describe, it, expect, jest, beforeEach } from '@jest/globals';
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import type { Request, Response } from 'express';
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// Mock dependencies
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jest.mock('../../modules/utils.js', () => ({
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_spawnPromise: jest.fn<() => Promise<string>>().mockResolvedValue('yt-dlp 2024.1.1'),
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}));
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describe('HTTP Routes', () => {
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let mockRequest: Partial<Request>;
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let mockResponse: Partial<Response>;
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let jsonMock: jest.Mock;
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let statusMock: jest.Mock;
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beforeEach(() => {
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jsonMock = jest.fn() as any;
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statusMock = jest.fn().mockReturnValue({ json: jsonMock }) as any;
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mockRequest = {
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headers: {},
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body: {},
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path: '/test',
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} as Partial<Request>;
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mockResponse = {
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json: jsonMock,
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status: statusMock,
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} as Partial<Response>;
|
||||
});
|
||||
|
||||
describe('Health Check', () => {
|
||||
it('should return ok status when yt-dlp is available', async () => {
|
||||
const { handleHealthCheck } = await import('../../http/routes.mjs');
|
||||
|
||||
await handleHealthCheck(
|
||||
mockRequest as Request,
|
||||
mockResponse as Response,
|
||||
undefined
|
||||
);
|
||||
|
||||
expect(jsonMock).toHaveBeenCalledWith(
|
||||
expect.objectContaining({
|
||||
status: 'ok',
|
||||
version: expect.any(String),
|
||||
sessions: 0,
|
||||
})
|
||||
);
|
||||
});
|
||||
|
||||
it('should return session count when sessionManager is provided', async () => {
|
||||
const { handleHealthCheck } = await import('../../http/routes.mjs');
|
||||
const { SessionManager } = await import('../../http/session.mjs');
|
||||
|
||||
const sessionManager = new SessionManager();
|
||||
|
||||
await handleHealthCheck(
|
||||
mockRequest as Request,
|
||||
mockResponse as Response,
|
||||
sessionManager
|
||||
);
|
||||
|
||||
expect(jsonMock).toHaveBeenCalledWith(
|
||||
expect.objectContaining({
|
||||
status: 'ok',
|
||||
sessions: 0,
|
||||
})
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe('API Key Middleware', () => {
|
||||
it('should allow requests to /health without API key', () => {
|
||||
const { apiKeyMiddleware } = require('../../http/middleware.mts');
|
||||
const nextMock = jest.fn();
|
||||
|
||||
const healthRequest = {
|
||||
...mockRequest,
|
||||
path: '/health',
|
||||
} as Request;
|
||||
|
||||
apiKeyMiddleware(
|
||||
healthRequest,
|
||||
mockResponse as Response,
|
||||
nextMock
|
||||
);
|
||||
|
||||
expect(nextMock).toHaveBeenCalled();
|
||||
expect(statusMock).not.toHaveBeenCalled();
|
||||
});
|
||||
|
||||
it('should allow requests when no API key is configured', () => {
|
||||
// Save original env
|
||||
const originalApiKey = process.env.YTDLP_API_KEY;
|
||||
delete process.env.YTDLP_API_KEY;
|
||||
|
||||
const { apiKeyMiddleware } = require('../../http/middleware.mts');
|
||||
const nextMock = jest.fn();
|
||||
|
||||
const mcpRequest = {
|
||||
...mockRequest,
|
||||
path: '/mcp',
|
||||
} as Request;
|
||||
|
||||
apiKeyMiddleware(
|
||||
mcpRequest,
|
||||
mockResponse as Response,
|
||||
nextMock
|
||||
);
|
||||
|
||||
expect(nextMock).toHaveBeenCalled();
|
||||
|
||||
// Restore env
|
||||
if (originalApiKey) {
|
||||
process.env.YTDLP_API_KEY = originalApiKey;
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
describe('Session Manager', () => {
|
||||
it('should create and manage sessions', async () => {
|
||||
const { SessionManager } = await import('../../http/session.mjs');
|
||||
const sessionManager = new SessionManager();
|
||||
|
||||
expect(sessionManager.size).toBe(0);
|
||||
});
|
||||
|
||||
it('should touch session to update lastActivity', async () => {
|
||||
const { SessionManager } = await import('../../http/session.mjs');
|
||||
const sessionManager = new SessionManager();
|
||||
|
||||
const mockEntry = {
|
||||
transport: {} as any,
|
||||
server: {} as any,
|
||||
eventStore: {} as any,
|
||||
created: Date.now(),
|
||||
lastActivity: Date.now() - 1000,
|
||||
};
|
||||
|
||||
sessionManager.set('test-session', mockEntry);
|
||||
|
||||
const beforeTouch = sessionManager.get('test-session')?.lastActivity;
|
||||
|
||||
// Wait a bit
|
||||
await new Promise(resolve => setTimeout(resolve, 10));
|
||||
|
||||
sessionManager.touch('test-session');
|
||||
|
||||
const afterTouch = sessionManager.get('test-session')?.lastActivity;
|
||||
|
||||
expect(afterTouch).toBeGreaterThan(beforeTouch!);
|
||||
});
|
||||
});
|
||||
});
|
||||
23
src/http/config.mts
Normal file
23
src/http/config.mts
Normal file
@ -0,0 +1,23 @@
|
||||
/**
|
||||
* HTTP Server Configuration
|
||||
*/
|
||||
|
||||
export const VERSION = '0.7.0';
|
||||
|
||||
// Server configuration with validation
|
||||
export const PORT = Math.max(1, Math.min(65535, parseInt(process.env.YTDLP_HTTP_PORT || '3000', 10)));
|
||||
export const HOST = process.env.YTDLP_HTTP_HOST || '0.0.0.0';
|
||||
export const API_KEY = process.env.YTDLP_API_KEY;
|
||||
export const CORS_ORIGIN = process.env.YTDLP_CORS_ORIGIN || '*';
|
||||
export const RATE_LIMIT = Math.max(1, parseInt(process.env.YTDLP_RATE_LIMIT || '60', 10));
|
||||
export const SESSION_TIMEOUT = Math.max(60000, parseInt(process.env.YTDLP_SESSION_TIMEOUT || '3600000', 10));
|
||||
|
||||
// Timeout constants
|
||||
export const TIMEOUTS = {
|
||||
HTTP_REQUEST: 10 * 60 * 1000, // 10 minutes
|
||||
CLEANUP_INTERVAL: 5 * 60 * 1000, // 5 minutes
|
||||
SHUTDOWN_GRACE: 5000, // 5 seconds
|
||||
SHUTDOWN_FORCE: 10000, // 10 seconds
|
||||
KEEP_ALIVE: 65000, // 65 seconds
|
||||
HEADERS: 66000, // 66 seconds
|
||||
} as const;
|
||||
47
src/http/errors.mts
Normal file
47
src/http/errors.mts
Normal file
@ -0,0 +1,47 @@
|
||||
/**
|
||||
* Error handling utilities for HTTP server
|
||||
*/
|
||||
|
||||
import type { Response } from "express";
|
||||
import { ErrorCode } from "@modelcontextprotocol/sdk/types.js";
|
||||
|
||||
export function handleTransportError(error: unknown, requestId: unknown, res: Response): void {
|
||||
console.error('Transport error:', error);
|
||||
if (!res.headersSent) {
|
||||
res.status(500).json({
|
||||
jsonrpc: '2.0',
|
||||
error: {
|
||||
code: ErrorCode.InternalError,
|
||||
message: 'Transport error',
|
||||
data: error instanceof Error ? error.message : String(error)
|
||||
},
|
||||
id: requestId
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
export function sendInvalidRequestError(res: Response, requestId: unknown, message: string): void {
|
||||
res.status(400).json({
|
||||
jsonrpc: '2.0',
|
||||
error: {
|
||||
code: ErrorCode.InvalidRequest,
|
||||
message,
|
||||
},
|
||||
id: requestId
|
||||
});
|
||||
}
|
||||
|
||||
export function sendInternalError(res: Response, requestId: unknown, error: unknown): void {
|
||||
console.error('Internal error:', error);
|
||||
if (!res.headersSent) {
|
||||
res.status(500).json({
|
||||
jsonrpc: '2.0',
|
||||
error: {
|
||||
code: ErrorCode.InternalError,
|
||||
message: 'Internal error',
|
||||
data: error instanceof Error ? error.message : String(error)
|
||||
},
|
||||
id: requestId
|
||||
});
|
||||
}
|
||||
}
|
||||
71
src/http/middleware.mts
Normal file
71
src/http/middleware.mts
Normal file
@ -0,0 +1,71 @@
|
||||
/**
|
||||
* Express middleware for authentication and rate limiting
|
||||
*/
|
||||
|
||||
import type { Request, Response, NextFunction } from "express";
|
||||
import rateLimit from "express-rate-limit";
|
||||
import { timingSafeEqual } from "crypto";
|
||||
import { API_KEY, RATE_LIMIT } from "./config.mjs";
|
||||
|
||||
/**
|
||||
* Validate API key using constant-time comparison to prevent timing attacks
|
||||
*/
|
||||
function validateApiKey(req: Request): boolean {
|
||||
if (!API_KEY) return true;
|
||||
|
||||
const authHeader = req.headers.authorization;
|
||||
if (!authHeader) return false;
|
||||
|
||||
const token = authHeader.replace(/^Bearer\s+/i, '');
|
||||
|
||||
// Constant-time comparison to prevent timing attacks
|
||||
if (token.length !== API_KEY.length) return false;
|
||||
|
||||
try {
|
||||
return timingSafeEqual(
|
||||
Buffer.from(token),
|
||||
Buffer.from(API_KEY)
|
||||
);
|
||||
} catch {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* API key authentication middleware
|
||||
*/
|
||||
export function apiKeyMiddleware(req: Request, res: Response, next: NextFunction): void {
|
||||
if (req.path === '/health') {
|
||||
return next();
|
||||
}
|
||||
|
||||
if (!validateApiKey(req)) {
|
||||
res.status(401).json({ error: 'Unauthorized' });
|
||||
return;
|
||||
}
|
||||
|
||||
next();
|
||||
}
|
||||
|
||||
/**
|
||||
* Rate limiting middleware using express-rate-limit
|
||||
*/
|
||||
export const rateLimitMiddleware = rateLimit({
|
||||
windowMs: 60 * 1000, // 1 minute
|
||||
max: RATE_LIMIT,
|
||||
keyGenerator: (req: Request) => {
|
||||
// Use session ID for per-session rate limiting
|
||||
const sessionId = Array.isArray(req.headers['mcp-session-id'])
|
||||
? req.headers['mcp-session-id'][0]
|
||||
: req.headers['mcp-session-id'];
|
||||
return sessionId || req.ip || 'anonymous';
|
||||
},
|
||||
standardHeaders: true,
|
||||
legacyHeaders: false,
|
||||
handler: (_req: Request, res: Response) => {
|
||||
res.status(429).json({
|
||||
jsonrpc: '2.0',
|
||||
error: { code: -32000, message: 'Rate limit exceeded' },
|
||||
});
|
||||
},
|
||||
});
|
||||
181
src/http/routes.mts
Normal file
181
src/http/routes.mts
Normal file
@ -0,0 +1,181 @@
|
||||
/**
|
||||
* HTTP route handlers for MCP server
|
||||
*/
|
||||
|
||||
import type { Request, Response } from "express";
|
||||
import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
|
||||
import { isInitializeRequest } from "@modelcontextprotocol/sdk/types.js";
|
||||
import { randomUUID } from "crypto";
|
||||
import { SessionManager } from "./session.mjs";
|
||||
import { SimpleEventStore } from "../mcp/event-store.mjs";
|
||||
import { createMcpServer } from "../mcp/server.mjs";
|
||||
import { handleTransportError, sendInvalidRequestError, sendInternalError } from "./errors.mjs";
|
||||
import { _spawnPromise } from "../modules/utils.js";
|
||||
import { VERSION } from "./config.mjs";
|
||||
|
||||
/**
|
||||
* Health check endpoint
|
||||
*/
|
||||
export async function handleHealthCheck(_req: Request, res: Response, sessionManager?: SessionManager): Promise<void> {
|
||||
try {
|
||||
// Check if yt-dlp is available
|
||||
await _spawnPromise('yt-dlp', ['--version']);
|
||||
res.json({
|
||||
status: 'ok',
|
||||
version: VERSION,
|
||||
sessions: sessionManager?.size ?? 0,
|
||||
});
|
||||
} catch (error) {
|
||||
res.status(503).json({
|
||||
status: 'unhealthy',
|
||||
reason: 'yt-dlp not available',
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle MCP POST requests (JSON-RPC messages)
|
||||
*/
|
||||
export async function handleMcpPost(
|
||||
req: Request,
|
||||
res: Response,
|
||||
sessionManager: SessionManager
|
||||
): Promise<void> {
|
||||
const requestId = req?.body?.id;
|
||||
|
||||
try {
|
||||
const sessionId = Array.isArray(req.headers['mcp-session-id'])
|
||||
? req.headers['mcp-session-id'][0]
|
||||
: req.headers['mcp-session-id'];
|
||||
|
||||
let entry = sessionId ? sessionManager.get(sessionId) : undefined;
|
||||
|
||||
if (entry) {
|
||||
// Update activity timestamp
|
||||
sessionManager.touch(sessionId!);
|
||||
|
||||
// Reuse existing transport
|
||||
try {
|
||||
await entry.transport.handleRequest(req, res, req.body);
|
||||
} catch (transportError) {
|
||||
handleTransportError(transportError, requestId, res);
|
||||
}
|
||||
} else if (!sessionId && isInitializeRequest(req.body)) {
|
||||
// New initialization request - create new session
|
||||
const eventStore = new SimpleEventStore();
|
||||
let transport: StreamableHTTPServerTransport;
|
||||
|
||||
transport = new StreamableHTTPServerTransport({
|
||||
sessionIdGenerator: () => randomUUID(),
|
||||
enableJsonResponse: false,
|
||||
eventStore,
|
||||
onsessioninitialized: (newSessionId: string) => {
|
||||
console.log(`Session initialized: ${newSessionId}`);
|
||||
const now = Date.now();
|
||||
sessionManager.set(newSessionId, {
|
||||
transport,
|
||||
server,
|
||||
eventStore,
|
||||
created: now,
|
||||
lastActivity: now,
|
||||
});
|
||||
}
|
||||
});
|
||||
|
||||
const server = createMcpServer();
|
||||
await server.connect(transport);
|
||||
|
||||
try {
|
||||
await transport.handleRequest(req, res, req.body);
|
||||
} catch (transportError) {
|
||||
handleTransportError(transportError, requestId, res);
|
||||
}
|
||||
} else {
|
||||
sendInvalidRequestError(res, requestId, 'Bad Request: No valid session ID provided');
|
||||
}
|
||||
} catch (error) {
|
||||
sendInternalError(res, requestId, error);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle MCP GET requests (SSE streams for resumability)
|
||||
*/
|
||||
export async function handleMcpGet(
|
||||
req: Request,
|
||||
res: Response,
|
||||
sessionManager: SessionManager
|
||||
): Promise<void> {
|
||||
const requestId = req?.body?.id;
|
||||
|
||||
try {
|
||||
const sessionId = Array.isArray(req.headers['mcp-session-id'])
|
||||
? req.headers['mcp-session-id'][0]
|
||||
: req.headers['mcp-session-id'];
|
||||
|
||||
if (!sessionId || !sessionManager.get(sessionId)) {
|
||||
sendInvalidRequestError(res, requestId, 'Bad Request: No valid session ID provided');
|
||||
return;
|
||||
}
|
||||
|
||||
// Update activity timestamp
|
||||
sessionManager.touch(sessionId);
|
||||
|
||||
const lastEventId = req.headers['last-event-id'] as string | undefined;
|
||||
if (lastEventId) {
|
||||
console.log(`Client reconnecting with Last-Event-ID: ${lastEventId}`);
|
||||
} else {
|
||||
console.log(`Establishing new SSE stream for session ${sessionId}`);
|
||||
}
|
||||
|
||||
const entry = sessionManager.get(sessionId)!;
|
||||
|
||||
try {
|
||||
await entry.transport.handleRequest(req, res, req.body);
|
||||
} catch (transportError) {
|
||||
handleTransportError(transportError, requestId, res);
|
||||
}
|
||||
} catch (error) {
|
||||
sendInternalError(res, requestId, error);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle MCP DELETE requests (session termination)
|
||||
*/
|
||||
export async function handleMcpDelete(
|
||||
req: Request,
|
||||
res: Response,
|
||||
sessionManager: SessionManager
|
||||
): Promise<void> {
|
||||
const requestId = req?.body?.id;
|
||||
|
||||
try {
|
||||
const sessionId = Array.isArray(req.headers['mcp-session-id'])
|
||||
? req.headers['mcp-session-id'][0]
|
||||
: req.headers['mcp-session-id'];
|
||||
|
||||
if (!sessionId || !sessionManager.get(sessionId)) {
|
||||
sendInvalidRequestError(res, requestId, 'Bad Request: No valid session ID provided');
|
||||
return;
|
||||
}
|
||||
|
||||
console.log(`Received session termination request for session ${sessionId}`);
|
||||
|
||||
const entry = sessionManager.get(sessionId)!;
|
||||
|
||||
// Clean up event store
|
||||
await entry.eventStore.deleteSession(sessionId);
|
||||
|
||||
try {
|
||||
await entry.transport.handleRequest(req, res, req.body);
|
||||
} catch (transportError) {
|
||||
handleTransportError(transportError, requestId, res);
|
||||
}
|
||||
|
||||
// Remove from session manager
|
||||
sessionManager.delete(sessionId);
|
||||
} catch (error) {
|
||||
sendInternalError(res, requestId, error);
|
||||
}
|
||||
}
|
||||
88
src/http/session.mts
Normal file
88
src/http/session.mts
Normal file
@ -0,0 +1,88 @@
|
||||
/**
|
||||
* Session management for MCP HTTP transport
|
||||
*/
|
||||
|
||||
import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
|
||||
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
|
||||
import { SimpleEventStore } from "../mcp/event-store.mjs";
|
||||
import { SESSION_TIMEOUT } from "./config.mjs";
|
||||
|
||||
export interface TransportEntry {
|
||||
transport: StreamableHTTPServerTransport;
|
||||
server: Server;
|
||||
eventStore: SimpleEventStore;
|
||||
created: number;
|
||||
lastActivity: number;
|
||||
}
|
||||
|
||||
export class SessionManager {
|
||||
private transports = new Map<string, TransportEntry>();
|
||||
|
||||
get(sessionId: string): TransportEntry | undefined {
|
||||
return this.transports.get(sessionId);
|
||||
}
|
||||
|
||||
set(sessionId: string, entry: TransportEntry): void {
|
||||
this.transports.set(sessionId, entry);
|
||||
}
|
||||
|
||||
delete(sessionId: string): void {
|
||||
this.transports.delete(sessionId);
|
||||
}
|
||||
|
||||
get size(): number {
|
||||
return this.transports.size;
|
||||
}
|
||||
|
||||
/**
|
||||
* Update session activity timestamp
|
||||
*/
|
||||
touch(sessionId: string): void {
|
||||
const entry = this.transports.get(sessionId);
|
||||
if (entry) {
|
||||
entry.lastActivity = Date.now();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Clean up expired sessions to prevent memory leaks
|
||||
*/
|
||||
async cleanupExpired(): Promise<void> {
|
||||
const now = Date.now();
|
||||
for (const [sessionId, entry] of this.transports.entries()) {
|
||||
if (now - entry.lastActivity > SESSION_TIMEOUT) {
|
||||
console.log(`Cleaning up expired session: ${sessionId}`);
|
||||
|
||||
// Clean up event store
|
||||
await entry.eventStore.deleteSession(sessionId);
|
||||
|
||||
entry.transport.close();
|
||||
this.transports.delete(sessionId);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Close all sessions gracefully
|
||||
*/
|
||||
async closeAll(): Promise<void> {
|
||||
const closePromises = [];
|
||||
for (const [sessionId, entry] of this.transports.entries()) {
|
||||
console.log(`Closing session: ${sessionId}`);
|
||||
|
||||
closePromises.push(entry.eventStore.deleteSession(sessionId));
|
||||
entry.transport.close();
|
||||
}
|
||||
|
||||
await Promise.race([
|
||||
Promise.all(closePromises),
|
||||
new Promise(resolve => setTimeout(resolve, 5000))
|
||||
]);
|
||||
|
||||
this.transports.clear();
|
||||
}
|
||||
|
||||
entries(): IterableIterator<[string, TransportEntry]> {
|
||||
return this.transports.entries();
|
||||
}
|
||||
}
|
||||
61
src/http/validation.mts
Normal file
61
src/http/validation.mts
Normal file
@ -0,0 +1,61 @@
|
||||
/**
|
||||
* System validation utilities
|
||||
*/
|
||||
|
||||
import * as fs from "fs";
|
||||
import * as os from "os";
|
||||
import * as path from "path";
|
||||
import { CONFIG } from "../config.js";
|
||||
import { _spawnPromise, safeCleanup } from "../modules/utils.js";
|
||||
|
||||
/**
|
||||
* Validate downloads directory exists and is writable
|
||||
*/
|
||||
async function validateConfig(): Promise<void> {
|
||||
if (!fs.existsSync(CONFIG.file.downloadsDir)) {
|
||||
throw new Error(`Downloads directory does not exist: ${CONFIG.file.downloadsDir}`);
|
||||
}
|
||||
|
||||
try {
|
||||
const testFile = path.join(CONFIG.file.downloadsDir, '.write-test');
|
||||
fs.writeFileSync(testFile, '');
|
||||
fs.unlinkSync(testFile);
|
||||
} catch (error) {
|
||||
throw new Error(`No write permission in downloads directory: ${CONFIG.file.downloadsDir}`);
|
||||
}
|
||||
|
||||
try {
|
||||
const testDir = fs.mkdtempSync(path.join(os.tmpdir(), CONFIG.file.tempDirPrefix));
|
||||
await safeCleanup(testDir);
|
||||
} catch (error) {
|
||||
throw new Error(`Cannot create temporary directory in: ${os.tmpdir()}`);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Check that required external dependencies are installed
|
||||
*/
|
||||
async function checkDependencies(): Promise<void> {
|
||||
for (const tool of CONFIG.tools.required) {
|
||||
try {
|
||||
await _spawnPromise(tool, ["--version"]);
|
||||
} catch (error) {
|
||||
throw new Error(`Required tool '${tool}' is not installed or not accessible`);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Initialize and validate server environment
|
||||
*/
|
||||
export async function initialize(): Promise<void> {
|
||||
try {
|
||||
await validateConfig();
|
||||
await checkDependencies();
|
||||
console.log('✓ Configuration validated');
|
||||
console.log('✓ Dependencies checked');
|
||||
} catch (error) {
|
||||
console.error('Initialization failed:', error);
|
||||
process.exit(1);
|
||||
}
|
||||
}
|
||||
80
src/mcp/event-store.mts
Normal file
80
src/mcp/event-store.mts
Normal file
@ -0,0 +1,80 @@
|
||||
/**
|
||||
* In-memory event store for MCP session resumability
|
||||
*
|
||||
* This implementation includes memory leak protection by limiting
|
||||
* the number of events stored per session.
|
||||
*/
|
||||
|
||||
import type { EventStore, EventId, StreamId } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
|
||||
import type { JSONRPCMessage } from "@modelcontextprotocol/sdk/types.js";
|
||||
|
||||
const MAX_EVENTS_PER_SESSION = 1000;
|
||||
|
||||
export class SimpleEventStore implements EventStore {
|
||||
private events = new Map<StreamId, Array<{ eventId: EventId; message: JSONRPCMessage }>>();
|
||||
|
||||
/**
|
||||
* Generates a unique event ID that includes the stream ID for efficient lookup
|
||||
*/
|
||||
private generateEventId(streamId: StreamId): EventId {
|
||||
return `${streamId}_${Date.now()}_${Math.random().toString(36).substring(2, 10)}`;
|
||||
}
|
||||
|
||||
/**
|
||||
* Extracts stream ID from an event ID
|
||||
*/
|
||||
private getStreamIdFromEventId(eventId: EventId): StreamId {
|
||||
const parts = eventId.split('_');
|
||||
return parts.length > 0 ? parts[0] : '';
|
||||
}
|
||||
|
||||
async storeEvent(streamId: StreamId, message: JSONRPCMessage): Promise<EventId> {
|
||||
if (!this.events.has(streamId)) {
|
||||
this.events.set(streamId, []);
|
||||
}
|
||||
|
||||
const eventId = this.generateEventId(streamId);
|
||||
const sessionEvents = this.events.get(streamId)!;
|
||||
|
||||
sessionEvents.push({ eventId, message });
|
||||
|
||||
// Trim old events to prevent memory leak
|
||||
if (sessionEvents.length > MAX_EVENTS_PER_SESSION) {
|
||||
sessionEvents.splice(0, sessionEvents.length - MAX_EVENTS_PER_SESSION);
|
||||
}
|
||||
|
||||
return eventId;
|
||||
}
|
||||
|
||||
async deleteSession(streamId: StreamId): Promise<void> {
|
||||
this.events.delete(streamId);
|
||||
}
|
||||
|
||||
async replayEventsAfter(
|
||||
lastEventId: EventId,
|
||||
{ send }: { send: (eventId: EventId, message: JSONRPCMessage) => Promise<void> }
|
||||
): Promise<StreamId> {
|
||||
if (!lastEventId) {
|
||||
return '';
|
||||
}
|
||||
|
||||
// Extract stream ID from event ID for efficient lookup
|
||||
const streamId = this.getStreamIdFromEventId(lastEventId);
|
||||
if (!streamId || !this.events.has(streamId)) {
|
||||
return '';
|
||||
}
|
||||
|
||||
const streamEvents = this.events.get(streamId)!;
|
||||
const index = streamEvents.findIndex(e => e.eventId === lastEventId);
|
||||
|
||||
if (index >= 0) {
|
||||
// Replay all events after the given event ID
|
||||
const eventsToReplay = streamEvents.slice(index + 1);
|
||||
for (const { eventId, message } of eventsToReplay) {
|
||||
await send(eventId, message);
|
||||
}
|
||||
}
|
||||
|
||||
return streamId;
|
||||
}
|
||||
}
|
||||
51
src/mcp/schemas.mts
Normal file
51
src/mcp/schemas.mts
Normal file
@ -0,0 +1,51 @@
|
||||
/**
|
||||
* Zod validation schemas for MCP tool inputs
|
||||
*/
|
||||
|
||||
import { z } from "zod";
|
||||
|
||||
// Common field patterns
|
||||
const urlField = z.string().url();
|
||||
const languageField = z.string().regex(/^[a-z]{2,3}(-[A-Za-z]{2,4})?$/);
|
||||
const timestampField = z.string().regex(/^\d{2}:\d{2}:\d{2}(\.\d{1,3})?$/);
|
||||
|
||||
export const SearchVideosSchema = z.object({
|
||||
query: z.string().min(1).max(200),
|
||||
maxResults: z.number().int().min(1).max(50).default(10),
|
||||
offset: z.number().int().min(0).default(0),
|
||||
response_format: z.enum(["json", "markdown"]).default("markdown"),
|
||||
}).strict();
|
||||
|
||||
export const ListSubtitleLanguagesSchema = z.object({
|
||||
url: urlField,
|
||||
}).strict();
|
||||
|
||||
export const DownloadVideoSubtitlesSchema = z.object({
|
||||
url: urlField,
|
||||
language: languageField.optional(),
|
||||
}).strict();
|
||||
|
||||
export const DownloadVideoSchema = z.object({
|
||||
url: urlField,
|
||||
resolution: z.enum(["480p", "720p", "1080p", "best"]).optional(),
|
||||
startTime: timestampField.optional(),
|
||||
endTime: timestampField.optional(),
|
||||
}).strict();
|
||||
|
||||
export const DownloadAudioSchema = z.object({
|
||||
url: urlField,
|
||||
}).strict();
|
||||
|
||||
export const DownloadTranscriptSchema = z.object({
|
||||
url: urlField,
|
||||
language: languageField.optional(),
|
||||
}).strict();
|
||||
|
||||
export const GetVideoMetadataSchema = z.object({
|
||||
url: urlField,
|
||||
fields: z.array(z.string()).optional(),
|
||||
}).strict();
|
||||
|
||||
export const GetVideoMetadataSummarySchema = z.object({
|
||||
url: urlField,
|
||||
}).strict();
|
||||
239
src/mcp/server.mts
Normal file
239
src/mcp/server.mts
Normal file
@ -0,0 +1,239 @@
|
||||
/**
|
||||
* MCP Server creation and tool handlers
|
||||
*/
|
||||
|
||||
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
|
||||
import { CallToolRequestSchema, ListToolsRequestSchema } from "@modelcontextprotocol/sdk/types.js";
|
||||
import type { CallToolRequest } from "@modelcontextprotocol/sdk/types.js";
|
||||
import { z } from "zod";
|
||||
import { CONFIG } from "../config.js";
|
||||
import { downloadVideo } from "../modules/video.js";
|
||||
import { downloadAudio } from "../modules/audio.js";
|
||||
import { listSubtitles, downloadSubtitles, downloadTranscript } from "../modules/subtitle.js";
|
||||
import { searchVideos } from "../modules/search.js";
|
||||
import { getVideoMetadata, getVideoMetadataSummary } from "../modules/metadata.js";
|
||||
import {
|
||||
SearchVideosSchema,
|
||||
ListSubtitleLanguagesSchema,
|
||||
DownloadVideoSubtitlesSchema,
|
||||
DownloadVideoSchema,
|
||||
DownloadAudioSchema,
|
||||
DownloadTranscriptSchema,
|
||||
GetVideoMetadataSchema,
|
||||
GetVideoMetadataSummarySchema,
|
||||
} from "./schemas.mjs";
|
||||
import { VERSION } from "../http/config.mjs";
|
||||
|
||||
/**
|
||||
* Generic tool execution handler with error handling
|
||||
*/
|
||||
async function handleToolExecution<T>(
|
||||
action: () => Promise<T>,
|
||||
errorPrefix: string
|
||||
): Promise<{
|
||||
content: Array<{ type: "text", text: string }>,
|
||||
isError?: boolean
|
||||
}> {
|
||||
try {
|
||||
const result = await action();
|
||||
return {
|
||||
content: [{ type: "text", text: String(result) }]
|
||||
};
|
||||
} catch (error) {
|
||||
const errorMessage = error instanceof Error ? error.message : String(error);
|
||||
return {
|
||||
content: [{ type: "text", text: `${errorPrefix}: ${errorMessage}` }],
|
||||
isError: true
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Create and configure MCP server with all tool handlers
|
||||
*/
|
||||
export function createMcpServer(): Server {
|
||||
const server = new Server(
|
||||
{
|
||||
name: "yt-dlp-mcp-http",
|
||||
version: VERSION,
|
||||
},
|
||||
{
|
||||
capabilities: {
|
||||
tools: {}
|
||||
},
|
||||
}
|
||||
);
|
||||
|
||||
// Register list tools handler
|
||||
server.setRequestHandler(ListToolsRequestSchema, async () => {
|
||||
return {
|
||||
tools: [
|
||||
{
|
||||
name: "ytdlp_search_videos",
|
||||
description: "Search for videos on YouTube with pagination support",
|
||||
inputSchema: SearchVideosSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_list_subtitle_languages",
|
||||
description: "List all available subtitle languages for a video",
|
||||
inputSchema: ListSubtitleLanguagesSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_download_video_subtitles",
|
||||
description: "Download video subtitles in VTT format",
|
||||
inputSchema: DownloadVideoSubtitlesSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_download_video",
|
||||
description: "Download video file to Downloads folder",
|
||||
inputSchema: DownloadVideoSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_download_audio",
|
||||
description: "Extract and download audio from video",
|
||||
inputSchema: DownloadAudioSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_download_transcript",
|
||||
description: "Generate clean plain text transcript",
|
||||
inputSchema: DownloadTranscriptSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_get_video_metadata",
|
||||
description: "Extract comprehensive video metadata in JSON format",
|
||||
inputSchema: GetVideoMetadataSchema,
|
||||
},
|
||||
{
|
||||
name: "ytdlp_get_video_metadata_summary",
|
||||
description: "Get human-readable summary of key video information",
|
||||
inputSchema: GetVideoMetadataSummarySchema,
|
||||
},
|
||||
],
|
||||
};
|
||||
});
|
||||
|
||||
// Register call tool handler
|
||||
server.setRequestHandler(
|
||||
CallToolRequestSchema,
|
||||
async (request: CallToolRequest) => {
|
||||
const toolName = request.params.name;
|
||||
const args = request.params.arguments as {
|
||||
url: string;
|
||||
language?: string;
|
||||
resolution?: string;
|
||||
startTime?: string;
|
||||
endTime?: string;
|
||||
query?: string;
|
||||
maxResults?: number;
|
||||
offset?: number;
|
||||
response_format?: string;
|
||||
fields?: string[];
|
||||
};
|
||||
|
||||
try {
|
||||
switch (toolName) {
|
||||
case "ytdlp_search_videos": {
|
||||
const validated = SearchVideosSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => searchVideos(
|
||||
validated.query,
|
||||
validated.maxResults,
|
||||
validated.offset,
|
||||
validated.response_format,
|
||||
CONFIG
|
||||
),
|
||||
"Error searching videos"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_list_subtitle_languages": {
|
||||
const validated = ListSubtitleLanguagesSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => listSubtitles(validated.url),
|
||||
"Error listing subtitle languages"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_download_video_subtitles": {
|
||||
const validated = DownloadVideoSubtitlesSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => downloadSubtitles(
|
||||
validated.url,
|
||||
validated.language || CONFIG.download.defaultSubtitleLanguage,
|
||||
CONFIG
|
||||
),
|
||||
"Error downloading subtitles"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_download_video": {
|
||||
const validated = DownloadVideoSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => downloadVideo(
|
||||
validated.url,
|
||||
CONFIG,
|
||||
validated.resolution as "480p" | "720p" | "1080p" | "best" | undefined,
|
||||
validated.startTime,
|
||||
validated.endTime
|
||||
),
|
||||
"Error downloading video"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_download_audio": {
|
||||
const validated = DownloadAudioSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => downloadAudio(validated.url, CONFIG),
|
||||
"Error downloading audio"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_download_transcript": {
|
||||
const validated = DownloadTranscriptSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => downloadTranscript(
|
||||
validated.url,
|
||||
validated.language || CONFIG.download.defaultSubtitleLanguage,
|
||||
CONFIG
|
||||
),
|
||||
"Error downloading transcript"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_get_video_metadata": {
|
||||
const validated = GetVideoMetadataSchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => getVideoMetadata(validated.url, validated.fields, CONFIG),
|
||||
"Error extracting video metadata"
|
||||
);
|
||||
}
|
||||
|
||||
case "ytdlp_get_video_metadata_summary": {
|
||||
const validated = GetVideoMetadataSummarySchema.parse(args);
|
||||
return handleToolExecution(
|
||||
() => getVideoMetadataSummary(validated.url, CONFIG),
|
||||
"Error generating video metadata summary"
|
||||
);
|
||||
}
|
||||
|
||||
default:
|
||||
return {
|
||||
content: [{ type: "text", text: `Unknown tool: ${toolName}` }],
|
||||
isError: true
|
||||
};
|
||||
}
|
||||
} catch (error) {
|
||||
if (error instanceof z.ZodError) {
|
||||
const errorMessages = error.issues.map((e) => `${e.path.join('.')}: ${e.message}`).join(', ');
|
||||
return {
|
||||
content: [{ type: "text", text: `Invalid input: ${errorMessages}` }],
|
||||
isError: true
|
||||
};
|
||||
}
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
);
|
||||
|
||||
return server;
|
||||
}
|
||||
134
src/server-http.mts
Normal file
134
src/server-http.mts
Normal file
@ -0,0 +1,134 @@
|
||||
#!/usr/bin/env node
|
||||
|
||||
/**
|
||||
* Remote MCP Server for yt-dlp-mcp using Streamable HTTP Transport
|
||||
*
|
||||
* This server exposes yt-dlp MCP tools over HTTP using the official
|
||||
* StreamableHTTPServerTransport from @modelcontextprotocol/sdk.
|
||||
*
|
||||
* Security Features:
|
||||
* - CORS configuration
|
||||
* - Rate limiting per session
|
||||
* - Request size limits (4MB via SDK)
|
||||
* - Content-type validation (via SDK)
|
||||
* - Optional API key authentication
|
||||
* - Session management with timeouts
|
||||
*
|
||||
* Usage:
|
||||
* yt-dlp-mcp-http [--port 3000] [--host 0.0.0.0]
|
||||
*
|
||||
* Environment Variables:
|
||||
* YTDLP_HTTP_PORT - Server port (default: 3000)
|
||||
* YTDLP_HTTP_HOST - Server host (default: 0.0.0.0)
|
||||
* YTDLP_API_KEY - Optional API key for authentication
|
||||
* YTDLP_CORS_ORIGIN - CORS allowed origin (default: *)
|
||||
* YTDLP_RATE_LIMIT - Max requests per minute per session (default: 60)
|
||||
* YTDLP_SESSION_TIMEOUT - Session timeout in ms (default: 3600000 = 1 hour)
|
||||
*/
|
||||
|
||||
import express from "express";
|
||||
import cors from "cors";
|
||||
import { PORT, HOST, API_KEY, CORS_ORIGIN, RATE_LIMIT, SESSION_TIMEOUT, TIMEOUTS, VERSION } from "./http/config.mjs";
|
||||
import { apiKeyMiddleware, rateLimitMiddleware } from "./http/middleware.mjs";
|
||||
import { handleHealthCheck, handleMcpPost, handleMcpGet, handleMcpDelete } from "./http/routes.mjs";
|
||||
import { SessionManager } from "./http/session.mjs";
|
||||
import { initialize } from "./http/validation.mjs";
|
||||
|
||||
/**
|
||||
* Start HTTP server
|
||||
*/
|
||||
async function startServer() {
|
||||
await initialize();
|
||||
|
||||
const app = express();
|
||||
const sessionManager = new SessionManager();
|
||||
|
||||
// Configure body parser with explicit size limit
|
||||
app.use(express.json({ limit: '4mb' }));
|
||||
|
||||
// Configure CORS
|
||||
app.use(cors({
|
||||
origin: CORS_ORIGIN,
|
||||
credentials: CORS_ORIGIN !== '*', // credentials not allowed with wildcard origin
|
||||
methods: ['GET', 'POST', 'DELETE', 'OPTIONS'],
|
||||
}));
|
||||
|
||||
// Apply API key authentication
|
||||
app.use(apiKeyMiddleware);
|
||||
|
||||
// Apply rate limiting to MCP endpoints
|
||||
app.use('/mcp', rateLimitMiddleware);
|
||||
|
||||
// Health check endpoint
|
||||
app.get('/health', (req, res) => handleHealthCheck(req, res, sessionManager));
|
||||
|
||||
// MCP endpoints
|
||||
app.post('/mcp', (req, res) => handleMcpPost(req, res, sessionManager));
|
||||
app.get('/mcp', (req, res) => handleMcpGet(req, res, sessionManager));
|
||||
app.delete('/mcp', (req, res) => handleMcpDelete(req, res, sessionManager));
|
||||
|
||||
// Start listening
|
||||
const httpServer = app.listen(PORT, HOST, () => {
|
||||
// Configure timeouts for long-running downloads
|
||||
httpServer.timeout = TIMEOUTS.HTTP_REQUEST;
|
||||
httpServer.keepAliveTimeout = TIMEOUTS.KEEP_ALIVE;
|
||||
httpServer.headersTimeout = TIMEOUTS.HEADERS;
|
||||
|
||||
// Start cleanup interval
|
||||
setInterval(async () => {
|
||||
try {
|
||||
await sessionManager.cleanupExpired();
|
||||
} catch (err) {
|
||||
console.error('Error during session cleanup:', err);
|
||||
}
|
||||
}, TIMEOUTS.CLEANUP_INTERVAL);
|
||||
|
||||
printStartupBanner();
|
||||
});
|
||||
|
||||
// Graceful shutdown
|
||||
process.on('SIGINT', async () => {
|
||||
console.log('\n\nShutting down gracefully...');
|
||||
|
||||
await sessionManager.closeAll();
|
||||
|
||||
httpServer.close(() => {
|
||||
console.log('Server closed');
|
||||
process.exit(0);
|
||||
});
|
||||
|
||||
// Force exit after timeout
|
||||
setTimeout(() => {
|
||||
console.error('Forced shutdown after timeout');
|
||||
process.exit(1);
|
||||
}, TIMEOUTS.SHUTDOWN_FORCE);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Print startup banner
|
||||
*/
|
||||
function printStartupBanner() {
|
||||
console.log(`
|
||||
╔════════════════════════════════════════════════╗
|
||||
║ 🎬 yt-dlp-mcp HTTP Server ║
|
||||
╟────────────────────────────────────────────────╢
|
||||
║ Version: ${VERSION.padEnd(34)} ║
|
||||
║ Protocol: Streamable HTTP (MCP Spec)${' '.repeat(7)}║
|
||||
║ Endpoint: http://${HOST}:${PORT}/mcp${' '.repeat(Math.max(0, 17 - HOST.length - PORT.toString().length))}║
|
||||
║ Health: http://${HOST}:${PORT}/health${' '.repeat(Math.max(0, 13 - HOST.length - PORT.toString().length))}║
|
||||
╟────────────────────────────────────────────────╢
|
||||
║ Security: ║
|
||||
║ • API Key: ${API_KEY ? '✓ Enabled' : '✗ Disabled'}${' '.repeat(API_KEY ? 18 : 19)}║
|
||||
║ • CORS: ${CORS_ORIGIN.padEnd(25)} ║
|
||||
║ • Rate Limit: ${RATE_LIMIT}/min per session${' '.repeat(Math.max(0, 11 - RATE_LIMIT.toString().length))}║
|
||||
║ • Session Timeout: ${(SESSION_TIMEOUT / 60000).toFixed(0)} minutes${' '.repeat(Math.max(0, 18 - (SESSION_TIMEOUT / 60000).toFixed(0).length))}║
|
||||
╚════════════════════════════════════════════════╝
|
||||
`);
|
||||
|
||||
if (!API_KEY) {
|
||||
console.warn('⚠️ Warning: No API key configured. Set YTDLP_API_KEY for production use.');
|
||||
}
|
||||
}
|
||||
|
||||
startServer().catch(console.error);
|
||||
Loading…
x
Reference in New Issue
Block a user