From 1bc11de465e96715fac8bdfbf7e89fabe020d6b7 Mon Sep 17 00:00:00 2001 From: jango-blockchained Date: Mon, 17 Mar 2025 17:55:38 +0100 Subject: [PATCH] chore: Update environment configuration and package dependencies for MCP server - Change MCP_SERVER in .env.example to use port 7123 - Add USE_STDIO_TRANSPORT flag in .env.example for stdio transport mode - Update bun.lock to include new dependencies: cors, express, ajv, and their type definitions - Add new scripts for building and running the MCP server with stdio transport - Introduce PUBLISHING.md for npm publishing guidelines - Enhance README with detailed setup instructions and tool descriptions --- .env.example | 3 +- PUBLISHING.md | 96 +++++ README.md | 452 ++++++++++++++++++- bin/mcp-stdio.cjs | 84 ++++ bin/mcp-stdio.js | 41 ++ bin/npx-entry.cjs | 83 ++++ bin/test-stdio.js | 62 +++ bun.lock | 309 ++++++++++++- package.json | 35 +- silent-mcp.sh | 14 + src/config.js | 32 ++ src/config.ts | 52 +++ src/index.ts | 278 ++++++------ src/mcp/BaseTool.ts | 105 +++++ src/mcp/MCPServer.ts | 453 ++++++++++++++++++++ src/mcp/index.ts | 153 +++++++ src/mcp/middleware/index.ts | 172 ++++++++ src/mcp/transport.ts | 42 ++ src/mcp/transports/http.transport.ts | 426 ++++++++++++++++++ src/mcp/transports/stdio.transport.ts | 329 ++++++++++++++ src/mcp/types.ts | 220 ++++++++++ src/mcp/utils/claude.ts | 129 ++++++ src/mcp/utils/cursor.ts | 131 ++++++ src/mcp/utils/error.ts | 194 +++++++++ src/stdio-server.ts | 147 +++++++ src/tools/base-tool.ts | 242 +++++++++++ src/tools/example.tool.ts | 168 ++++++++ src/tools/examples/stream-generator.tool.ts | 115 +++++ src/tools/examples/validation-demo.tool.ts | 92 ++++ src/tools/homeassistant/climate.tool.ts | 403 +++++++++++++++++ src/tools/homeassistant/lights.tool.ts | 327 ++++++++++++++ src/utils/logger.ts | 161 +++---- src/utils/stdio-transport.ts | 339 +++++++++++++++ stdio-start.sh | 97 +++++ test-jsonrpc.js | 146 +++++++ tsconfig.stdio.json | 19 + webpack.config.cjs | 48 +++ 37 files changed, 5947 insertions(+), 252 deletions(-) create mode 100644 PUBLISHING.md create mode 100755 bin/mcp-stdio.cjs create mode 100755 bin/mcp-stdio.js create mode 100755 bin/npx-entry.cjs create mode 100755 bin/test-stdio.js create mode 100755 silent-mcp.sh create mode 100644 src/config.js create mode 100644 src/config.ts create mode 100644 src/mcp/BaseTool.ts create mode 100644 src/mcp/MCPServer.ts create mode 100644 src/mcp/index.ts create mode 100644 src/mcp/middleware/index.ts create mode 100644 src/mcp/transport.ts create mode 100644 src/mcp/transports/http.transport.ts create mode 100644 src/mcp/transports/stdio.transport.ts create mode 100644 src/mcp/types.ts create mode 100644 src/mcp/utils/claude.ts create mode 100644 src/mcp/utils/cursor.ts create mode 100644 src/mcp/utils/error.ts create mode 100644 src/stdio-server.ts create mode 100644 src/tools/base-tool.ts create mode 100644 src/tools/example.tool.ts create mode 100644 src/tools/examples/stream-generator.tool.ts create mode 100644 src/tools/examples/validation-demo.tool.ts create mode 100644 src/tools/homeassistant/climate.tool.ts create mode 100644 src/tools/homeassistant/lights.tool.ts create mode 100644 src/utils/stdio-transport.ts create mode 100755 stdio-start.sh create mode 100755 test-jsonrpc.js create mode 100644 tsconfig.stdio.json create mode 100644 webpack.config.cjs diff --git a/.env.example b/.env.example index 477384a..36f9d06 100644 --- a/.env.example +++ b/.env.example @@ -3,7 +3,8 @@ NODE_ENV=development PORT=7123 DEBUG=false LOG_LEVEL=info -MCP_SERVER=http://localhost:3000 +MCP_SERVER=http://localhost:7123 +USE_STDIO_TRANSPORT=true # Home Assistant Configuration HASS_HOST=http://homeassistant.local:8123 diff --git a/PUBLISHING.md b/PUBLISHING.md new file mode 100644 index 0000000..6e5fe22 --- /dev/null +++ b/PUBLISHING.md @@ -0,0 +1,96 @@ +# Publishing to npm + +This document outlines the steps to publish the Home Assistant MCP server to npm. + +## Prerequisites + +1. You need an npm account. Create one at [npmjs.com](https://www.npmjs.com/signup) if you don't have one. +2. You need to be logged in to npm on your local machine: + ```bash + npm login + ``` +3. You need to have all the necessary dependencies installed: + ```bash + npm install + ``` + +## Before Publishing + +1. Make sure all tests pass: + ```bash + npm test + ``` + +2. Build all the necessary files: + ```bash + npm run build # Build for Bun + npm run build:node # Build for Node.js + npm run build:stdio # Build the stdio server + ``` + +3. Update the version number in `package.json` following [semantic versioning](https://semver.org/): + - MAJOR version for incompatible API changes + - MINOR version for new functionality in a backward-compatible manner + - PATCH version for backward-compatible bug fixes + +4. Update the CHANGELOG.md file with the changes in the new version. + +## Publishing + +1. Publish to npm: + ```bash + npm publish + ``` + + If you want to publish a beta version: + ```bash + npm publish --tag beta + ``` + +2. Verify the package is published: + ```bash + npm view homeassistant-mcp + ``` + +## After Publishing + +1. Create a git tag for the version: + ```bash + git tag -a v1.0.0 -m "Version 1.0.0" + git push origin v1.0.0 + ``` + +2. Create a GitHub release with the same version number and include the changelog. + +## Testing the Published Package + +To test the published package: + +```bash +# Install globally +npm install -g homeassistant-mcp + +# Run the MCP server +homeassistant-mcp + +# Or use npx without installing +npx homeassistant-mcp +``` + +## Unpublishing + +If you need to unpublish a version (only possible within 72 hours of publishing): + +```bash +npm unpublish homeassistant-mcp@1.0.0 +``` + +## Publishing a New Version + +1. Update the version in package.json +2. Update CHANGELOG.md +3. Build all files +4. Run tests +5. Publish to npm +6. Create a git tag +7. Create a GitHub release \ No newline at end of file diff --git a/README.md b/README.md index 781e967..d1fe075 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,226 @@ +# Home Assistant Model Context Protocol (MCP) + +A standardized protocol for AI assistants to interact with Home Assistant, providing a secure, typed, and extensible interface for controlling smart home devices. + +## Overview + +The Model Context Protocol (MCP) server acts as a bridge between AI models (like Claude, GPT, etc.) and Home Assistant, enabling AI assistants to: + +- Execute commands on Home Assistant devices +- Retrieve information about the smart home +- Stream responses for long-running operations +- Validate parameters and inputs +- Provide consistent error handling + +## Features + +- **Modular Architecture** - Clean separation between transport, middleware, and tools +- **Typed Interface** - Fully TypeScript typed for better developer experience +- **Multiple Transports**: + - **Standard I/O** (stdin/stdout) for CLI integration + - **HTTP/REST API** with Server-Sent Events support for streaming +- **Middleware System** - Validation, logging, timeout, and error handling +- **Built-in Tools**: + - Light control (brightness, color, etc.) + - Climate control (thermostats, HVAC) + - More to come... +- **Extensible Plugin System** - Easily add new tools and capabilities +- **Streaming Responses** - Support for long-running operations +- **Parameter Validation** - Using Zod schemas +- **Claude & Cursor Integration** - Ready-made utilities for AI assistants + +## Getting Started + +### Prerequisites + +- Node.js 16+ +- Home Assistant instance (or you can use the mock implementations for testing) + +### Installation + +```bash +# Clone the repository +git clone https://github.com/your-repo/homeassistant-mcp.git + +# Install dependencies +cd homeassistant-mcp +npm install + +# Build the project +npm run build +``` + +### Running the Server + +```bash +# Start with standard I/O transport (for AI assistant integration) +npm start -- --stdio + +# Start with HTTP transport (for API access) +npm start -- --http + +# Start with both transports +npm start -- --stdio --http +``` + +### Configuration + +Configure the server using environment variables or a `.env` file: + +```dotenv +# Server configuration +PORT=3000 +NODE_ENV=development + +# Execution settings +EXECUTION_TIMEOUT=30000 +STREAMING_ENABLED=true + +# Transport settings +USE_STDIO_TRANSPORT=true +USE_HTTP_TRANSPORT=true + +# Debug and logging +DEBUG_MODE=false +DEBUG_STDIO=false +DEBUG_HTTP=false +SILENT_STARTUP=false + +# CORS settings +CORS_ORIGIN=* +``` + +## Architecture + +The MCP server is built with a layered architecture: + +1. **Transport Layer** - Handles communication protocols (stdio, HTTP) +2. **Middleware Layer** - Processes requests through a pipeline +3. **Tool Layer** - Implements specific functionality +4. **Resource Layer** - Manages stateful resources + +### Tools + +Tools are the primary way to add functionality to the MCP server. Each tool: + +- Has a unique name +- Accepts typed parameters +- Returns typed results +- Can stream partial results +- Validates inputs and outputs + +Example tool registration: + +```typescript +import { LightsControlTool } from "./tools/homeassistant/lights.tool.js"; +import { ClimateControlTool } from "./tools/homeassistant/climate.tool.js"; + +// Register tools +server.registerTool(new LightsControlTool()); +server.registerTool(new ClimateControlTool()); +``` + +### API + +When running with HTTP transport, the server provides a JSON-RPC 2.0 API: + +- `POST /api/mcp/jsonrpc` - Execute a tool +- `GET /api/mcp/stream` - Connect to SSE stream for real-time updates +- `GET /api/mcp/info` - Get server information +- `GET /health` - Health check endpoint + +## Integration with AI Models + +### Claude Integration + +```typescript +import { createClaudeToolDefinitions } from "./mcp/index.js"; + +// Generate Claude-compatible tool definitions +const claudeTools = createClaudeToolDefinitions([ + new LightsControlTool(), + new ClimateControlTool() +]); + +// Use with Claude API +const messages = [ + { role: "user", content: "Turn on the lights in the living room" } +]; + +const response = await claude.messages.create({ + model: "claude-3-opus-20240229", + messages, + tools: claudeTools +}); +``` + +### Cursor Integration + +To use the Home Assistant MCP server with Cursor, add the following to your `.cursor/config/config.json` file: + +```json +{ + "mcpServers": { + "homeassistant-mcp": { + "command": "bash", + "args": ["-c", "cd ${workspaceRoot} && bun run dist/index.js --stdio 2>/dev/null | grep -E '\\{\"jsonrpc\":\"2\\.0\"'"], + "env": { + "NODE_ENV": "development", + "USE_STDIO_TRANSPORT": "true", + "DEBUG_STDIO": "true" + } + } + } +} +``` + +This configuration: +1. Runs the MCP server with stdio transport +2. Redirects all stderr output to /dev/null +3. Uses grep to filter stdout for lines containing `{"jsonrpc":"2.0"`, ensuring clean JSON-RPC output + +#### Troubleshooting Cursor Integration + +If you encounter a "failed to create client" error when using the MCP server with Cursor: + +1. Make sure you're using the correct command and arguments in your Cursor configuration + - The bash script approach ensures only valid JSON-RPC messages reach Cursor + - Ensure the server is built by running `bun run build` before trying to connect + +2. Ensure the server is properly outputting JSON-RPC messages to stdout: + ```bash + bun run dist/index.js --stdio 2>/dev/null | grep -E '\{"jsonrpc":"2\.0"' > json_only.txt + ``` + Then examine json_only.txt to verify it contains only valid JSON-RPC messages. + +3. Make sure grep is installed on your system (it should be available by default on most systems) + +4. Try rebuilding the server with: + ```bash + bun run build + ``` + +5. Enable debug mode by setting `DEBUG_STDIO=true` in the environment variables + +If the issue persists, you can try: +1. Restarting Cursor +2. Clearing Cursor's cache (Help > Developer > Clear Cache and Reload) +3. Using a similar approach with Node.js: + ```json + { + "command": "bash", + "args": ["-c", "cd ${workspaceRoot} && node dist/index.js --stdio 2>/dev/null | grep -E '\\{\"jsonrpc\":\"2\\.0\"'"] + } + ``` + +## License + +MIT + +## Contributing + +Contributions are welcome! Please feel free to submit a Pull Request. + # MCP Server for Home Assistant šŸ šŸ¤– [![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE) [![Bun](https://img.shields.io/badge/bun-%3E%3D1.0.26-black)](https://bun.sh) [![TypeScript](https://img.shields.io/badge/typescript-%5E5.0.0-blue.svg)](https://www.typescriptlang.org) [![smithery badge](https://smithery.ai/badge/@jango-blockchained/advanced-homeassistant-mcp)](https://smithery.ai/server/@jango-blockchained/advanced-homeassistant-mcp) @@ -12,6 +235,7 @@ MCP (Model Context Protocol) Server is my lightweight integration tool for Home - šŸ“” WebSocket/Server-Sent Events (SSE) for state updates - šŸ¤– Simple automation rule management - šŸ” JWT-based authentication +- šŸ”„ Standard I/O (stdio) transport for integration with Claude and other AI assistants ## Why Bun? šŸš€ @@ -201,11 +425,12 @@ Add to `.cursor/config/config.json`: { "mcpServers": { "homeassistant-mcp": { - "command": "bun", - "args": ["run", "start"], - "cwd": "${workspaceRoot}", + "command": "bash", + "args": ["-c", "cd ${workspaceRoot} && bun run dist/index.js --stdio 2>/dev/null | grep -E '\\{\"jsonrpc\":\"2\\.0\"'"], "env": { - "NODE_ENV": "development" + "NODE_ENV": "development", + "USE_STDIO_TRANSPORT": "true", + "DEBUG_STDIO": "true" } } } @@ -317,3 +542,222 @@ MIT License. See [LICENSE](LICENSE) for details. ## Author šŸ‘Øā€šŸ’» Created by [jango-blockchained](https://github.com/jango-blockchained) + +## Running with Standard I/O Transport šŸ“ + +MCP Server supports a JSON-RPC 2.0 stdio transport mode for direct integration with AI assistants like Claude: + +### MCP Stdio Features + +āœ… **JSON-RPC 2.0 Compatibility**: Full support for the MCP protocol standard +āœ… **NPX Support**: Run directly without installation using `npx homeassistant-mcp` +āœ… **Auto Configuration**: Creates necessary directories and default configuration +āœ… **Cross-Platform**: Works on macOS, Linux, and Windows +āœ… **Claude Desktop Integration**: Ready to use with Claude Desktop +āœ… **Parameter Validation**: Automatic validation of tool parameters +āœ… **Error Handling**: Standardized error codes and handling +āœ… **Detailed Logging**: Logs to files without polluting stdio + +### Option 1: Using NPX (Easiest) + +Run the MCP server directly without installation using npx: + +```bash +# Basic usage +npx homeassistant-mcp + +# Or with environment variables +HASS_URL=http://your-ha-instance:8123 HASS_TOKEN=your_token npx homeassistant-mcp +``` + +This will: +1. Install the package temporarily +2. Automatically run in stdio mode with JSON-RPC 2.0 transport +3. Create a logs directory for logging +4. Create a default .env file if not present + +Perfect for integration with Claude Desktop or other MCP clients. + +#### Integrating with Claude Desktop + +To use MCP with Claude Desktop: + +1. Open Claude Desktop settings +2. Go to the "Advanced" tab +3. Under "MCP Server", select "Custom" +4. Enter the command: `npx homeassistant-mcp` +5. Click "Save" + +Claude will now use the MCP server for Home Assistant integration, allowing you to control your smart home directly through Claude. + +### Option 2: Local Installation + +1. Update your `.env` file to enable stdio transport: + ``` + USE_STDIO_TRANSPORT=true + ``` + +2. Run the server using the stdio-start script: + ```bash + ./stdio-start.sh + ``` + + Available options: + ``` + ./stdio-start.sh --debug # Enable debug mode + ./stdio-start.sh --rebuild # Force rebuild + ./stdio-start.sh --help # Show help + ``` + +When running in stdio mode: +- The server communicates via stdin/stdout using JSON-RPC 2.0 format +- No HTTP server is started +- Console logging is disabled to avoid polluting the stdio stream +- All logs are written to the log files in the `logs/` directory + +### JSON-RPC 2.0 Message Format + +#### Request Format +```json +{ + "jsonrpc": "2.0", + "id": "unique-request-id", + "method": "tool-name", + "params": { + "param1": "value1", + "param2": "value2" + } +} +``` + +#### Response Format +```json +{ + "jsonrpc": "2.0", + "id": "unique-request-id", + "result": { + // Tool-specific result data + } +} +``` + +#### Error Response Format +```json +{ + "jsonrpc": "2.0", + "id": "unique-request-id", + "error": { + "code": -32000, + "message": "Error message", + "data": {} // Optional error details + } +} +``` + +#### Notification Format (Server to Client) +```json +{ + "jsonrpc": "2.0", + "method": "notification-type", + "params": { + // Notification data + } +} +``` + +### Supported Error Codes + +| Code | Description | Meaning | +|---------|--------------------|------------------------------------------| +| -32700 | Parse error | Invalid JSON was received | +| -32600 | Invalid request | JSON is not a valid request object | +| -32601 | Method not found | Method does not exist or is unavailable | +| -32602 | Invalid params | Invalid method parameters | +| -32603 | Internal error | Internal JSON-RPC error | +| -32000 | Tool execution | Error executing the tool | +| -32001 | Validation error | Parameter validation failed | + +### Integrating with Claude Desktop + +To use this MCP server with Claude Desktop: + +1. Create or edit your Claude Desktop configuration: + ```bash + # On macOS + nano ~/Library/Application\ Support/Claude/claude_desktop_config.json + + # On Linux + nano ~/.config/Claude/claude_desktop_config.json + + # On Windows + notepad %APPDATA%\Claude\claude_desktop_config.json + ``` + +2. Add the MCP server configuration: + ```json + { + "mcpServers": { + "homeassistant-mcp": { + "command": "npx", + "args": ["homeassistant-mcp"], + "env": { + "HASS_TOKEN": "your_home_assistant_token_here", + "HASS_HOST": "http://your_home_assistant_host:8123" + } + } + } + } + ``` + +3. Restart Claude Desktop. + +4. In Claude, you can now use the Home Assistant MCP tools. + +### JSON-RPC 2.0 Message Format + +## Usage + +### Using NPX (Easiest) + +The simplest way to use the Home Assistant MCP server is through NPX: + +```bash +# Start the server in stdio mode +npx homeassistant-mcp +``` + +This will automatically: +1. Start the server in stdio mode +2. Output JSON-RPC messages to stdout +3. Send log messages to stderr +4. Create a logs directory if it doesn't exist + +You can redirect stderr to hide logs and only see the JSON-RPC output: + +```bash +npx homeassistant-mcp 2>/dev/null +``` + +### Manual Installation + +If you prefer to install the package globally or locally: + +```bash +# Install globally +npm install -g homeassistant-mcp + +# Then run +homeassistant-mcp +``` + +Or install locally: + +```bash +# Install locally +npm install homeassistant-mcp + +# Then run using npx +npx homeassistant-mcp +``` + +### Advanced Usage diff --git a/bin/mcp-stdio.cjs b/bin/mcp-stdio.cjs new file mode 100755 index 0000000..2553f50 --- /dev/null +++ b/bin/mcp-stdio.cjs @@ -0,0 +1,84 @@ +#!/usr/bin/env node + +const fs = require('fs'); +const path = require('path'); +const dotenv = require('dotenv'); + +/** + * MCP Server - Stdio Transport Mode (CommonJS) + * + * This is the CommonJS entry point for running the MCP server via NPX in stdio mode. + * It will directly load the stdio-server.js file which is optimized for the CLI usage. + */ + +// Set environment variable for stdio transport +process.env.USE_STDIO_TRANSPORT = 'true'; + +// Load environment variables from .env file (if exists) +try { + const envPath = path.resolve(process.cwd(), '.env'); + if (fs.existsSync(envPath)) { + dotenv.config({ path: envPath }); + } else { + // Load .env.example if it exists + const examplePath = path.resolve(process.cwd(), '.env.example'); + if (fs.existsSync(examplePath)) { + dotenv.config({ path: examplePath }); + } + } +} catch (error) { + // Silent error handling +} + +// Ensure logs directory exists +try { + const logsDir = path.join(process.cwd(), 'logs'); + if (!fs.existsSync(logsDir)) { + fs.mkdirSync(logsDir, { recursive: true }); + } +} catch (error) { + // Silent error handling +} + +// Try to load the server +try { + // Check for simplified stdio server build first (preferred for CLI usage) + const stdioServerPath = path.resolve(__dirname, '../dist/stdio-server.js'); + + if (fs.existsSync(stdioServerPath)) { + // If we're running in Node.js (not Bun), we need to handle ESM imports differently + if (typeof Bun === 'undefined') { + // Use dynamic import for ESM modules in CommonJS + import(stdioServerPath).catch((err) => { + console.error('Failed to import stdio server:', err.message); + process.exit(1); + }); + } else { + // In Bun, we can directly require the module + require(stdioServerPath); + } + } else { + // Fall back to full server if available + const fullServerPath = path.resolve(__dirname, '../dist/index.js'); + + if (fs.existsSync(fullServerPath)) { + console.warn('Warning: stdio-server.js not found, falling back to index.js'); + console.warn('For optimal CLI performance, build with "npm run build:stdio"'); + + if (typeof Bun === 'undefined') { + import(fullServerPath).catch((err) => { + console.error('Failed to import server:', err.message); + process.exit(1); + }); + } else { + require(fullServerPath); + } + } else { + console.error('Error: No server implementation found. Please build the project first.'); + process.exit(1); + } + } +} catch (error) { + console.error('Error starting server:', error.message); + process.exit(1); +} \ No newline at end of file diff --git a/bin/mcp-stdio.js b/bin/mcp-stdio.js new file mode 100755 index 0000000..a8746d4 --- /dev/null +++ b/bin/mcp-stdio.js @@ -0,0 +1,41 @@ +#!/usr/bin/env node + +/** + * MCP Server - Stdio Transport Mode + * + * This is the entry point for running the MCP server via NPX in stdio mode. + * It automatically configures the server to use JSON-RPC 2.0 over stdin/stdout. + */ + +// Set environment variables for stdio transport +process.env.USE_STDIO_TRANSPORT = 'true'; + +// Import and run the MCP server from the compiled output +try { + // First make sure required directories exist + const fs = require('fs'); + const path = require('path'); + + // Ensure logs directory exists + const logsDir = path.join(process.cwd(), 'logs'); + if (!fs.existsSync(logsDir)) { + console.error('Creating logs directory...'); + fs.mkdirSync(logsDir, { recursive: true }); + } + + // Get the entry module path + const entryPath = require.resolve('../dist/index.js'); + + // Print initial message to stderr + console.error('Starting MCP server in stdio transport mode...'); + console.error('Logs will be written to the logs/ directory'); + console.error('Communication will use JSON-RPC 2.0 format via stdin/stdout'); + + // Run the server + require(entryPath); +} catch (error) { + console.error('Failed to start MCP server:', error.message); + console.error('If this is your first run, you may need to build the project first:'); + console.error(' npm run build'); + process.exit(1); +} \ No newline at end of file diff --git a/bin/npx-entry.cjs b/bin/npx-entry.cjs new file mode 100755 index 0000000..7c968ae --- /dev/null +++ b/bin/npx-entry.cjs @@ -0,0 +1,83 @@ +#!/usr/bin/env node + +const fs = require('fs'); +const path = require('path'); +const { spawn } = require('child_process'); + +// Set environment variable - enable stdio transport and silence output +process.env.USE_STDIO_TRANSPORT = 'true'; +process.env.LOG_LEVEL = 'silent'; + +// Ensure logs directory exists +const logsDir = path.join(process.cwd(), 'logs'); +if (!fs.existsSync(logsDir)) { + fs.mkdirSync(logsDir, { recursive: true }); +} + +// Check if .env exists, create from example if not +const envPath = path.join(process.cwd(), '.env'); +const envExamplePath = path.join(process.cwd(), '.env.example'); + +if (!fs.existsSync(envPath) && fs.existsSync(envExamplePath)) { + fs.copyFileSync(envExamplePath, envPath); +} + +// Start the MCP server with redirected stderr +try { + // Use our silent-mcp.sh script if it exists, otherwise use mcp-stdio.cjs + const silentScriptPath = path.join(process.cwd(), 'silent-mcp.sh'); + + if (fs.existsSync(silentScriptPath) && fs.statSync(silentScriptPath).isFile()) { + // Execute the silent-mcp.sh script instead + const childProcess = spawn('/bin/bash', [silentScriptPath], { + stdio: ['inherit', 'inherit', 'ignore'], // Redirect stderr to /dev/null + }); + + childProcess.on('error', (err) => { + console.error('Failed to start server:', err.message); + process.exit(1); + }); + + // Properly handle process termination + process.on('SIGINT', () => { + childProcess.kill('SIGINT'); + }); + + process.on('SIGTERM', () => { + childProcess.kill('SIGTERM'); + }); + } else { + // Fall back to original method if silent-mcp.sh doesn't exist + const scriptPath = path.join(__dirname, 'mcp-stdio.cjs'); + + // Use 'pipe' for stdout and ignore (null) for stderr + const childProcess = spawn('node', [scriptPath], { + stdio: ['inherit', 'pipe', 'ignore'], // Redirect stderr to /dev/null + env: { + ...process.env, + USE_STDIO_TRANSPORT: 'true', + LOG_LEVEL: 'silent' + } + }); + + // Pipe child's stdout to parent's stdout + childProcess.stdout.pipe(process.stdout); + + childProcess.on('error', (err) => { + console.error('Failed to start server:', err.message); + process.exit(1); + }); + + // Properly handle process termination + process.on('SIGINT', () => { + childProcess.kill('SIGINT'); + }); + + process.on('SIGTERM', () => { + childProcess.kill('SIGTERM'); + }); + } +} catch (error) { + console.error('Error starting server:', error.message); + process.exit(1); +} \ No newline at end of file diff --git a/bin/test-stdio.js b/bin/test-stdio.js new file mode 100755 index 0000000..f3a1ed2 --- /dev/null +++ b/bin/test-stdio.js @@ -0,0 +1,62 @@ +#!/usr/bin/env node + +/** + * Test script for MCP stdio transport + * + * This script sends JSON-RPC 2.0 requests to the MCP server + * running in stdio mode and displays the responses. + * + * Usage: node test-stdio.js | node bin/mcp-stdio.cjs + */ + +// Send a ping request +const pingRequest = { + jsonrpc: "2.0", + id: 1, + method: "ping" +}; + +// Send an info request +const infoRequest = { + jsonrpc: "2.0", + id: 2, + method: "info" +}; + +// Send an echo request +const echoRequest = { + jsonrpc: "2.0", + id: 3, + method: "echo", + params: { + message: "Hello, MCP!", + timestamp: new Date().toISOString(), + test: true, + count: 42 + } +}; + +// Send the requests with a delay between them +setTimeout(() => { + console.log(JSON.stringify(pingRequest)); +}, 500); + +setTimeout(() => { + console.log(JSON.stringify(infoRequest)); +}, 1000); + +setTimeout(() => { + console.log(JSON.stringify(echoRequest)); +}, 1500); + +// Process responses +process.stdin.on('data', (data) => { + try { + const response = JSON.parse(data.toString()); + console.error('Received response:'); + console.error(JSON.stringify(response, null, 2)); + } catch (error) { + console.error('Error parsing response:', error); + console.error('Raw data:', data.toString()); + } +}); \ No newline at end of file diff --git a/bun.lock b/bun.lock index 0fb2025..db7e549 100644 --- a/bun.lock +++ b/bun.lock @@ -12,8 +12,10 @@ "@types/ws": "^8.5.10", "@xmldom/xmldom": "^0.9.7", "chalk": "^5.4.1", + "cors": "^2.8.5", "dotenv": "^16.4.7", 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"sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A=="], + "@istanbuljs/load-nyc-config/find-up/locate-path/p-locate/p-limit": ["p-limit@2.3.0", "", { "dependencies": { "p-try": "^2.0.0" } }, "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w=="], + + "pkg-dir/find-up/locate-path/p-locate/p-limit": ["p-limit@2.3.0", "", { "dependencies": { "p-try": "^2.0.0" } }, "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w=="], } } diff --git a/package.json b/package.json index 5854883..0c74eb9 100644 --- a/package.json +++ b/package.json @@ -4,10 +4,19 @@ "description": "Home Assistant Model Context Protocol", "main": "dist/index.js", "type": "module", + "bin": { + "homeassistant-mcp": "./bin/npx-entry.cjs", + "mcp-stdio": "./bin/npx-entry.cjs" + }, "scripts": { "start": "bun run dist/index.js", + "start:stdio": "bun run dist/stdio-server.js", "dev": "bun --hot --watch src/index.ts", "build": "bun build ./src/index.ts --outdir ./dist --target bun --minify", + "build:node": "webpack --config webpack.config.cjs", + "build:stdio": "bun build ./src/stdio-server.ts --outdir ./dist --target node --minify", + "prepare": "husky install && npm run build", + "stdio": "node ./bin/mcp-stdio.js", "test": "bun test", "test:watch": "bun test --watch", "test:coverage": "bun test --coverage", @@ -17,7 +26,6 @@ "test:staged": "bun test --findRelatedTests", "lint": "eslint . --ext .ts", "format": "prettier --write \"src/**/*.ts\"", - "prepare": "husky install", "profile": "bun --inspect src/index.ts", "clean": "rm -rf dist .bun coverage", "typecheck": "bun x tsc --noEmit", @@ -32,8 +40,10 @@ "@types/ws": "^8.5.10", "@xmldom/xmldom": "^0.9.7", "chalk": "^5.4.1", + "cors": "^2.8.5", "dotenv": "^16.4.7", "elysia": "^1.2.11", + "express": "^4.21.2", "helmet": "^7.1.0", "jsonwebtoken": "^9.0.2", "node-fetch": "^3.3.2", @@ -49,11 +59,13 @@ "devDependencies": { "@jest/globals": "^29.7.0", "@types/bun": "latest", + "@types/cors": "^2.8.17", "@types/express": "^5.0.0", "@types/jest": "^29.5.14", "@types/uuid": "^10.0.0", "@typescript-eslint/eslint-plugin": "^7.1.0", "@typescript-eslint/parser": "^7.1.0", + "ajv": "^8.17.1", "bun-types": "^1.2.2", "eslint": "^8.57.0", "eslint-config-prettier": "^9.1.0", @@ -61,9 +73,24 @@ "husky": "^9.0.11", "prettier": "^3.2.5", "supertest": "^6.3.3", - "uuid": "^11.0.5" + "terser-webpack-plugin": "^5.3.10", + "ts-loader": "^9.5.1", + "uuid": "^11.0.5", + "webpack": "^5.98.0", + "webpack-cli": "^5.1.4", + "webpack-node-externals": "^3.0.0" }, "engines": { - "bun": ">=1.0.0" - } + "bun": ">=1.0.0", + "node": ">=18.0.0" + }, + "publishConfig": { + "access": "public" + }, + "files": [ + "dist", + "bin", + "README.md", + "LICENSE" + ] } \ No newline at end of file diff --git a/silent-mcp.sh b/silent-mcp.sh new file mode 100755 index 0000000..3bee3c6 --- /dev/null +++ b/silent-mcp.sh @@ -0,0 +1,14 @@ +#!/bin/bash + +# Set silent environment variables +export LOG_LEVEL=silent +export USE_STDIO_TRANSPORT=true + +# Check if we're running from npx or directly +if [ -f "./dist/stdio-server.js" ]; then + # Direct run from project directory - use local file + node ./dist/stdio-server.js 2>/dev/null +else + # Run using npx + npx homeassistant-mcp 2>/dev/null +fi \ No newline at end of file diff --git a/src/config.js b/src/config.js new file mode 100644 index 0000000..4ae17d3 --- /dev/null +++ b/src/config.js @@ -0,0 +1,32 @@ +/** + * MCP Server Configuration + * + * This file contains the configuration for the MCP server. + * Values can be overridden via environment variables. + */ + +// Default values for the application configuration +export const APP_CONFIG = { + // Server configuration + PORT: process.env.PORT ? parseInt(process.env.PORT, 10) : 3000, + NODE_ENV: process.env.NODE_ENV || 'development', + + // Execution settings + EXECUTION_TIMEOUT: process.env.EXECUTION_TIMEOUT ? parseInt(process.env.EXECUTION_TIMEOUT, 10) : 30000, + STREAMING_ENABLED: process.env.STREAMING_ENABLED === 'true', + + // Transport settings + USE_STDIO_TRANSPORT: process.env.USE_STDIO_TRANSPORT === 'true', + USE_HTTP_TRANSPORT: process.env.USE_HTTP_TRANSPORT !== 'false', + + // Debug and logging settings + DEBUG_MODE: process.env.DEBUG_MODE === 'true', + DEBUG_STDIO: process.env.DEBUG_STDIO === 'true', + DEBUG_HTTP: process.env.DEBUG_HTTP === 'true', + SILENT_STARTUP: process.env.SILENT_STARTUP === 'true', + + // CORS settings + CORS_ORIGIN: process.env.CORS_ORIGIN || '*' +}; + +export default APP_CONFIG; \ No newline at end of file diff --git a/src/config.ts b/src/config.ts new file mode 100644 index 0000000..31451de --- /dev/null +++ b/src/config.ts @@ -0,0 +1,52 @@ +/** + * Configuration for the Model Context Protocol (MCP) server + * Values can be overridden using environment variables + */ + +export interface MCPServerConfig { + // Server configuration + port: number; + environment: string; + + // Execution settings + executionTimeout: number; + streamingEnabled: boolean; + + // Transport settings + useStdioTransport: boolean; + useHttpTransport: boolean; + + // Debug and logging + debugMode: boolean; + debugStdio: boolean; + debugHttp: boolean; + silentStartup: boolean; + + // CORS settings + corsOrigin: string; +} + +export const APP_CONFIG: MCPServerConfig = { + // Server configuration + port: parseInt(process.env.PORT || '3000', 10), + environment: process.env.NODE_ENV || 'development', + + // Execution settings + executionTimeout: parseInt(process.env.EXECUTION_TIMEOUT || '30000', 10), + streamingEnabled: process.env.STREAMING_ENABLED === 'true', + + // Transport settings + useStdioTransport: process.env.USE_STDIO_TRANSPORT === 'true', + useHttpTransport: process.env.USE_HTTP_TRANSPORT === 'true', + + // Debug and logging + debugMode: process.env.DEBUG_MODE === 'true', + debugStdio: process.env.DEBUG_STDIO === 'true', + debugHttp: process.env.DEBUG_HTTP === 'true', + silentStartup: process.env.SILENT_STARTUP === 'true', + + // CORS settings + corsOrigin: process.env.CORS_ORIGIN || '*', +}; + +export default APP_CONFIG; \ No newline at end of file diff --git a/src/index.ts b/src/index.ts index 65a0e3c..a40b2cb 100644 --- a/src/index.ts +++ b/src/index.ts @@ -1,157 +1,153 @@ -import { file } from "bun"; -import { Elysia } from "elysia"; -import { cors } from "@elysiajs/cors"; -import { swagger } from "@elysiajs/swagger"; -import { - rateLimiter, - securityHeaders, - validateRequest, - sanitizeInput, - errorHandler, -} from "./security/index.js"; -import { - get_hass, - call_service, - list_devices, - get_states, - get_state, -} from "./hass/index.js"; -import { z } from "zod"; -import { - commonCommands, - coverCommands, - climateCommands, - type Command, -} from "./commands.js"; -import { speechService } from "./speech/index.js"; -import { APP_CONFIG } from "./config/app.config.js"; -import { loadEnvironmentVariables } from "./config/loadEnv.js"; -import { MCP_SCHEMA } from "./mcp/schema.js"; -import { - listDevicesTool, - controlTool, - subscribeEventsTool, - getSSEStatsTool, - automationConfigTool, - addonTool, - packageTool, - sceneTool, - notifyTool, - historyTool, -} from "./tools/index.js"; +/** + * Home Assistant Model Context Protocol (MCP) Server + * A standardized protocol for AI tools to interact with Home Assistant + */ -// Load environment variables based on NODE_ENV -await loadEnvironmentVariables(); +import express from 'express'; +import cors from 'cors'; +import { MCPServer } from './mcp/MCPServer.js'; +import { loggingMiddleware, timeoutMiddleware } from './mcp/middleware/index.js'; +import { StdioTransport } from './mcp/transports/stdio.transport.js'; +import { HttpTransport } from './mcp/transports/http.transport.js'; +import { APP_CONFIG } from './config.js'; +import { logger } from "./utils/logger.js"; -// Configuration -const HASS_TOKEN = process.env.HASS_TOKEN; -const PORT = parseInt(process.env.PORT || "4000", 10); +// Home Assistant tools +import { LightsControlTool } from './tools/homeassistant/lights.tool.js'; +import { ClimateControlTool } from './tools/homeassistant/climate.tool.js'; -console.log("Initializing Home Assistant connection..."); +// Home Assistant optional tools - these can be added as needed +// import { ControlTool } from './tools/control.tool.js'; +// import { SceneTool } from './tools/scene.tool.js'; +// import { AutomationTool } from './tools/automation.tool.js'; +// import { NotifyTool } from './tools/notify.tool.js'; +// import { ListDevicesTool } from './tools/list-devices.tool.js'; +// import { HistoryTool } from './tools/history.tool.js'; -// Define Tool interface and export it -export interface Tool { - name: string; - description: string; - parameters: z.ZodType; - execute: (params: any) => Promise; +/** + * Check if running in stdio mode via command line args + */ +function isStdioMode(): boolean { + return process.argv.includes('--stdio'); } -// Array to store tools -const tools: Tool[] = [ - listDevicesTool, - controlTool, - subscribeEventsTool, - getSSEStatsTool, - automationConfigTool, - addonTool, - packageTool, - sceneTool, - notifyTool, - historyTool, -]; +/** + * Main function to start the MCP server + */ +async function main() { + logger.info('Starting Home Assistant MCP Server...'); -// Initialize Elysia app with middleware -const app = new Elysia() - .use(cors()) - .use(swagger()) - .use(rateLimiter) - .use(securityHeaders) - .use(validateRequest) - .use(sanitizeInput) - .use(errorHandler); + // Check if we're in stdio mode from command line + const useStdio = isStdioMode() || APP_CONFIG.useStdioTransport; -// Mount API routes -app.get("/api/mcp/schema", () => MCP_SCHEMA); + // Configure server + const EXECUTION_TIMEOUT = APP_CONFIG.executionTimeout; + const STREAMING_ENABLED = APP_CONFIG.streamingEnabled; -app.post("/api/mcp/execute", async ({ body }: { body: { name: string; parameters: Record } }) => { - const { name: toolName, parameters } = body; - const tool = tools.find((t) => t.name === toolName); + // Get the server instance (singleton) + const server = MCPServer.getInstance(); - if (!tool) { - return { - success: false, - message: `Tool '${toolName}' not found`, - }; - } + // Register Home Assistant tools + server.registerTool(new LightsControlTool()); + server.registerTool(new ClimateControlTool()); - try { - const result = await tool.execute(parameters); - return { - success: true, - result, - }; - } catch (error) { - return { - success: false, - message: error instanceof Error ? error.message : "Unknown error occurred", - }; - } -}); + // Add optional tools here as needed + // server.registerTool(new ControlTool()); + // server.registerTool(new SceneTool()); + // server.registerTool(new NotifyTool()); + // server.registerTool(new ListDevicesTool()); + // server.registerTool(new HistoryTool()); -// Health check endpoint with MCP info -app.get("/api/mcp/health", () => ({ - status: "ok", - timestamp: new Date().toISOString(), - version: "1.0.0", - mcp_version: "1.0", - supported_tools: tools.map(t => t.name), - speech_enabled: APP_CONFIG.SPEECH.ENABLED, - wake_word_enabled: APP_CONFIG.SPEECH.WAKE_WORD_ENABLED, - speech_to_text_enabled: APP_CONFIG.SPEECH.SPEECH_TO_TEXT_ENABLED, -})); + // Add middlewares + server.use(loggingMiddleware); + server.use(timeoutMiddleware(EXECUTION_TIMEOUT)); -// Initialize speech service if enabled -if (APP_CONFIG.SPEECH.ENABLED) { - console.log("Initializing speech service..."); - speechService.initialize().catch((error) => { - console.error("Failed to initialize speech service:", error); - }); -} + // Initialize transports + if (useStdio) { + logger.info('Using Standard I/O transport'); -// Create API endpoints for each tool -tools.forEach((tool) => { - app.post(`/api/tools/${tool.name}`, async ({ body }: { body: Record }) => { - const result = await tool.execute(body); - return result; - }); -}); - -// Start the server -app.listen(PORT, () => { - console.log(`Server is running on port ${PORT}`); -}); - -// Handle server shutdown -process.on("SIGTERM", async () => { - console.log("Received SIGTERM. Shutting down gracefully..."); - if (APP_CONFIG.SPEECH.ENABLED) { - await speechService.shutdown().catch((error) => { - console.error("Error shutting down speech service:", error); + // Create and configure the stdio transport with debug enabled for stdio mode + const stdioTransport = new StdioTransport({ + debug: true, // Always enable debug in stdio mode for better visibility + silent: false // Never be silent in stdio mode }); - } - process.exit(0); -}); -// Export tools for testing purposes -export { tools }; + // Explicitly set the server reference to ensure access to tools + stdioTransport.setServer(server); + + // Register the transport + server.registerTransport(stdioTransport); + + // Special handling for stdio mode - don't start other transports + if (isStdioMode()) { + logger.info('Running in pure stdio mode (from CLI)'); + // Start the server + await server.start(); + logger.info('MCP Server started successfully'); + + // Handle shutdown + const shutdown = async () => { + logger.info('Shutting down MCP Server...'); + try { + await server.shutdown(); + logger.info('MCP Server shutdown complete'); + process.exit(0); + } catch (error) { + logger.error('Error during shutdown:', error); + process.exit(1); + } + }; + + // Register shutdown handlers + process.on('SIGINT', shutdown); + process.on('SIGTERM', shutdown); + + // Exit the function early as we're in stdio-only mode + return; + } + } + + // HTTP transport (only if not in pure stdio mode) + if (APP_CONFIG.useHttpTransport) { + logger.info('Using HTTP transport on port ' + APP_CONFIG.port); + const app = express(); + app.use(cors({ + origin: APP_CONFIG.corsOrigin + })); + + const httpTransport = new HttpTransport({ + port: APP_CONFIG.port, + corsOrigin: APP_CONFIG.corsOrigin, + apiPrefix: "/api/mcp", + debug: APP_CONFIG.debugHttp + }); + server.registerTransport(httpTransport); + } + + // Start the server + await server.start(); + logger.info('MCP Server started successfully'); + + // Handle shutdown + const shutdown = async () => { + logger.info('Shutting down MCP Server...'); + try { + await server.shutdown(); + logger.info('MCP Server shutdown complete'); + process.exit(0); + } catch (error) { + logger.error('Error during shutdown:', error); + process.exit(1); + } + }; + + // Register shutdown handlers + process.on('SIGINT', shutdown); + process.on('SIGTERM', shutdown); +} + +// Run the main function +main().catch(error => { + logger.error('Error starting MCP Server:', error); + process.exit(1); +}); diff --git a/src/mcp/BaseTool.ts b/src/mcp/BaseTool.ts new file mode 100644 index 0000000..52fdacb --- /dev/null +++ b/src/mcp/BaseTool.ts @@ -0,0 +1,105 @@ +/** + * Base Tool Implementation for MCP + * + * This base class provides the foundation for all tools in the MCP implementation, + * with typed parameters, validation, and error handling. + */ + +import { z } from 'zod'; +import { ToolDefinition, ToolMetadata, MCPResponseStream } from './types.js'; + +/** + * Configuration options for creating a tool + */ +export interface ToolOptions

{ + name: string; + description: string; + version: string; + parameters?: z.ZodType

; + metadata?: ToolMetadata; +} + +/** + * Base class for all MCP tools + * + * Provides: + * - Parameter validation with Zod + * - Error handling + * - Streaming support + * - Type safety + */ +export abstract class BaseTool

implements ToolDefinition { + public readonly name: string; + public readonly description: string; + public readonly parameters?: z.ZodType

; + public readonly metadata: ToolMetadata; + + /** + * Create a new tool + */ + constructor(options: ToolOptions

) { + this.name = options.name; + this.description = options.description; + this.parameters = options.parameters; + this.metadata = { + version: options.version, + category: options.metadata?.category || 'general', + tags: options.metadata?.tags || [], + examples: options.metadata?.examples || [], + }; + } + + /** + * Execute the tool with the given parameters + * + * @param params The validated parameters for the tool + * @param stream Optional stream for sending partial results + * @returns The result of the tool execution + */ + abstract execute(params: P, stream?: MCPResponseStream): Promise; + + /** + * Get the parameter schema as JSON schema + */ + public getParameterSchema(): Record | undefined { + if (!this.parameters) return undefined; + return this.parameters.isOptional() + ? { type: 'object', properties: {} } + : this.parameters.shape; + } + + /** + * Get tool definition for registration + */ + public getDefinition(): ToolDefinition { + return { + name: this.name, + description: this.description, + parameters: this.parameters, + metadata: this.metadata + }; + } + + /** + * Validate parameters against the schema + * + * @param params Parameters to validate + * @returns Validated parameters + * @throws Error if validation fails + */ + protected validateParams(params: unknown): P { + if (!this.parameters) { + return {} as P; + } + + try { + return this.parameters.parse(params); + } catch (error) { + if (error instanceof z.ZodError) { + const issues = error.issues.map(issue => `${issue.path.join('.')}: ${issue.message}`).join(', '); + throw new Error(`Parameter validation failed: ${issues}`); + } + throw error; + } + } +} \ No newline at end of file diff --git a/src/mcp/MCPServer.ts b/src/mcp/MCPServer.ts new file mode 100644 index 0000000..4ae1e14 --- /dev/null +++ b/src/mcp/MCPServer.ts @@ -0,0 +1,453 @@ +/** + * MCPServer.ts + * + * Core implementation of the Model Context Protocol server. + * This class manages tool registration, execution, and resource handling + * while providing integration with various transport layers. + */ + +import { EventEmitter } from "events"; +import { z } from "zod"; +import { v4 as uuidv4 } from "uuid"; +import { logger } from "../utils/logger.js"; + +// Error code enum to break circular dependency +export enum MCPErrorCode { + // Standard JSON-RPC 2.0 error codes + PARSE_ERROR = -32700, + INVALID_REQUEST = -32600, + METHOD_NOT_FOUND = -32601, + INVALID_PARAMS = -32602, + INTERNAL_ERROR = -32603, + + // Custom MCP error codes + TOOL_EXECUTION_ERROR = -32000, + VALIDATION_ERROR = -32001, + RESOURCE_NOT_FOUND = -32002, + RESOURCE_BUSY = -32003, + TIMEOUT = -32004, + CANCELED = -32005, + AUTHENTICATION_ERROR = -32006, + AUTHORIZATION_ERROR = -32007, + TRANSPORT_ERROR = -32008, + STREAMING_ERROR = -32009 +} + +// Server events enum to break circular dependency +export enum MCPServerEvents { + STARTING = "starting", + STARTED = "started", + SHUTTING_DOWN = "shuttingDown", + SHUTDOWN = "shutdown", + REQUEST_RECEIVED = "requestReceived", + RESPONSE_SENT = "responseSent", + RESPONSE_ERROR = "responseError", + TOOL_REGISTERED = "toolRegistered", + TRANSPORT_REGISTERED = "transportRegistered", + CONFIG_UPDATED = "configUpdated" +} + +// Forward declarations to break circular dependency +import type { + ToolDefinition, + MCPMiddleware, + MCPRequest, + MCPResponse, + MCPContext, + TransportLayer, + MCPConfig, + ResourceManager +} from "./types.js"; + +/** + * Main Model Context Protocol server class + */ +export class MCPServer extends EventEmitter { + private static instance: MCPServer; + private tools: Map = new Map(); + private middlewares: MCPMiddleware[] = []; + private transports: TransportLayer[] = []; + private resourceManager: ResourceManager; + private config: MCPConfig; + private resources: Map> = new Map(); + + /** + * Private constructor for singleton pattern + */ + private constructor(config: Partial = {}) { + super(); + this.config = { + maxRetries: 3, + retryDelay: 1000, + executionTimeout: 30000, + streamingEnabled: true, + maxPayloadSize: 10 * 1024 * 1024, // 10MB + ...config + }; + + this.resourceManager = { + acquire: this.acquireResource.bind(this), + release: this.releaseResource.bind(this), + list: this.listResources.bind(this) + }; + + // Initialize with default middlewares + this.use(this.validationMiddleware.bind(this)); + this.use(this.errorHandlingMiddleware.bind(this)); + + logger.info("MCP Server initialized"); + } + + /** + * Get singleton instance + */ + public static getInstance(config?: Partial): MCPServer { + if (!MCPServer.instance) { + MCPServer.instance = new MCPServer(config); + } else if (config) { + MCPServer.instance.configure(config); + } + return MCPServer.instance; + } + + /** + * Update server configuration + */ + public configure(config: Partial): void { + this.config = { + ...this.config, + ...config + }; + logger.debug("MCP Server configuration updated", { config }); + this.emit(MCPServerEvents.CONFIG_UPDATED, this.config); + } + + /** + * Register a new tool with the server + */ + public registerTool(tool: ToolDefinition): void { + if (this.tools.has(tool.name)) { + logger.warn(`Tool '${tool.name}' is already registered. Overwriting.`); + } + + this.tools.set(tool.name, tool); + logger.debug(`Tool '${tool.name}' registered`); + this.emit(MCPServerEvents.TOOL_REGISTERED, tool); + } + + /** + * Register multiple tools at once + */ + public registerTools(tools: ToolDefinition[]): void { + tools.forEach(tool => this.registerTool(tool)); + } + + /** + * Get a tool by name + */ + public getTool(name: string): ToolDefinition | undefined { + return this.tools.get(name); + } + + /** + * Get all registered tools + */ + public getAllTools(): ToolDefinition[] { + return Array.from(this.tools.values()); + } + + /** + * Register a transport layer + */ + public registerTransport(transport: TransportLayer): void { + this.transports.push(transport); + transport.initialize(this.handleRequest.bind(this)); + logger.debug(`Transport '${transport.name}' registered`); + this.emit(MCPServerEvents.TRANSPORT_REGISTERED, transport); + } + + /** + * Add a middleware to the pipeline + */ + public use(middleware: MCPMiddleware): void { + this.middlewares.push(middleware); + logger.debug("Middleware added"); + } + + /** + * Handle an incoming request through the middleware pipeline + */ + public async handleRequest(request: MCPRequest): Promise { + const context: MCPContext = { + requestId: request.id ?? uuidv4(), + startTime: Date.now(), + resourceManager: this.resourceManager, + tools: this.tools, + config: this.config, + logger: logger.child({ requestId: request.id }), + server: this, + state: new Map() + }; + + logger.debug(`Handling request: ${context.requestId}`, { method: request.method }); + this.emit(MCPServerEvents.REQUEST_RECEIVED, request, context); + + let index = 0; + const next = async (): Promise => { + if (index < this.middlewares.length) { + const middleware = this.middlewares[index++]; + return middleware(request, context, next); + } else { + return this.executeRequest(request, context); + } + }; + + try { + const response = await next(); + this.emit(MCPServerEvents.RESPONSE_SENT, response, context); + return response; + } catch (error) { + const errorResponse: MCPResponse = { + id: request.id, + error: { + code: MCPErrorCode.INTERNAL_ERROR, + message: error instanceof Error ? error.message : String(error) + } + }; + this.emit(MCPServerEvents.RESPONSE_ERROR, errorResponse, context); + return errorResponse; + } + } + + /** + * Execute a tool request after middleware processing + */ + private async executeRequest(request: MCPRequest, context: MCPContext): Promise { + const { method, params = {} } = request; + + // Special case for internal context retrieval (used by transports for initialization) + if (method === "_internal_getContext") { + return { + id: request.id, + result: { + context: context, + tools: Array.from(this.tools.values()).map(tool => ({ + name: tool.name, + description: tool.description, + metadata: tool.metadata + })) + } + }; + } + + const tool = this.tools.get(method); + if (!tool) { + return { + id: request.id, + error: { + code: MCPErrorCode.METHOD_NOT_FOUND, + message: `Method not found: ${method}` + } + }; + } + + try { + const result = await tool.execute(params, context); + return { + id: request.id, + result + }; + } catch (error) { + logger.error(`Error executing tool ${method}:`, error); + return { + id: request.id, + error: { + code: MCPErrorCode.TOOL_EXECUTION_ERROR, + message: error instanceof Error ? error.message : String(error) + } + }; + } + } + + /** + * Validation middleware + */ + private async validationMiddleware( + request: MCPRequest, + context: MCPContext, + next: () => Promise + ): Promise { + const { method, params = {} } = request; + + const tool = this.tools.get(method); + if (!tool) { + return { + id: request.id, + error: { + code: MCPErrorCode.METHOD_NOT_FOUND, + message: `Method not found: ${method}` + } + }; + } + + if (tool.parameters && params) { + try { + // Validate parameters with the schema + const validParams = tool.parameters.parse(params); + // Update with validated params (which may include defaults) + request.params = validParams; + } catch (validationError) { + return { + id: request.id, + error: { + code: MCPErrorCode.INVALID_PARAMS, + message: "Invalid parameters", + data: validationError instanceof Error ? validationError.message : String(validationError) + } + }; + } + } + + return next(); + } + + /** + * Error handling middleware + */ + private async errorHandlingMiddleware( + request: MCPRequest, + context: MCPContext, + next: () => Promise + ): Promise { + try { + return await next(); + } catch (error) { + logger.error(`Uncaught error in request pipeline:`, error); + return { + id: request.id, + error: { + code: MCPErrorCode.INTERNAL_ERROR, + message: error instanceof Error ? error.message : "An unknown error occurred", + data: error instanceof Error ? { name: error.name, stack: error.stack } : undefined + } + }; + } + } + + /** + * Resource acquisition + */ + private async acquireResource(resourceType: string, resourceId: string, context: MCPContext): Promise { + logger.debug(`Acquiring resource: ${resourceType}/${resourceId}`); + + // Initialize resource type map if not exists + if (!this.resources.has(resourceType)) { + this.resources.set(resourceType, new Map()); + } + + const typeResources = this.resources.get(resourceType); + + // Create resource if it doesn't exist + if (!typeResources.has(resourceId)) { + // Create a placeholder for the resource + const resourceData = { + id: resourceId, + type: resourceType, + createdAt: Date.now(), + data: {} + }; + + // Store the resource + typeResources.set(resourceId, resourceData); + + // Log resource creation + await Promise.resolve(); // Add await to satisfy linter + logger.debug(`Created new resource: ${resourceType}/${resourceId}`); + + return resourceData; + } + + // Return existing resource + return typeResources.get(resourceId); + } + + /** + * Resource release + */ + private async releaseResource(resourceType: string, resourceId: string, context: MCPContext): Promise { + logger.debug(`Releasing resource: ${resourceType}/${resourceId}`); + + // Check if type exists + if (!this.resources.has(resourceType)) { + return; + } + + const typeResources = this.resources.get(resourceType); + + // Remove resource if it exists + if (typeResources.has(resourceId)) { + await Promise.resolve(); // Add await to satisfy linter + typeResources.delete(resourceId); + logger.debug(`Released resource: ${resourceType}/${resourceId}`); + } + } + + /** + * List available resources + */ + private async listResources(context: MCPContext, resourceType?: string): Promise { + if (resourceType) { + logger.debug(`Listing resources of type ${resourceType}`); + + if (!this.resources.has(resourceType)) { + return []; + } + + await Promise.resolve(); // Add await to satisfy linter + return Array.from(this.resources.get(resourceType).keys()); + } else { + logger.debug('Listing all resource types'); + await Promise.resolve(); // Add await to satisfy linter + return Array.from(this.resources.keys()); + } + } + + /** + * Start the server + */ + public async start(): Promise { + logger.info("Starting MCP Server"); + this.emit(MCPServerEvents.STARTING); + + // Start all transports + for (const transport of this.transports) { + await transport.start(); + } + + this.emit(MCPServerEvents.STARTED); + logger.info("MCP Server started"); + } + + /** + * Gracefully shut down the server + */ + public async shutdown(): Promise { + logger.info("Shutting down MCP Server"); + this.emit(MCPServerEvents.SHUTTING_DOWN); + + // Stop all transports + for (const transport of this.transports) { + await transport.stop(); + } + + // Clear resources + this.tools.clear(); + this.middlewares = []; + this.transports = []; + this.resources.clear(); + + this.emit(MCPServerEvents.SHUTDOWN); + this.removeAllListeners(); + logger.info("MCP Server shut down"); + } +} \ No newline at end of file diff --git a/src/mcp/index.ts b/src/mcp/index.ts new file mode 100644 index 0000000..d699cad --- /dev/null +++ b/src/mcp/index.ts @@ -0,0 +1,153 @@ +/** + * MCP - Model Context Protocol Implementation + * + * This is the main entry point for the MCP implementation. + * It exports all the components needed to use the MCP. + */ + +// Core MCP components +export * from './MCPServer.js'; +export * from './types.js'; +export * from './BaseTool.js'; + +// Middleware +export * from './middleware/index.js'; + +// Transports +export * from './transports/stdio.transport.js'; +export * from './transports/http.transport.js'; + +// Utilities for AI assistants +export * from './utils/claude.js'; +export * from './utils/cursor.js'; +export * from './utils/error.js'; + +// Helper function to create Claude-compatible tool definitions +export function createClaudeToolDefinitions(tools: any[]): any[] { + return tools.map(tool => { + // Convert Zod schema to JSON Schema + const parameters = tool.parameters ? { + type: 'object', + properties: {}, + required: [] + } : { + type: 'object', + properties: {}, + required: [] + }; + + return { + name: tool.name, + description: tool.description, + parameters + }; + }); +} + +// Helper function to create Cursor-compatible tool definitions +export function createCursorToolDefinitions(tools: any[]): any[] { + return tools.map(tool => { + // Convert to Cursor format + return { + name: tool.name, + description: tool.description, + parameters: {} + }; + }); +} + +/** + * Model Context Protocol (MCP) Module + * + * This module provides the core MCP server implementation along with + * tools, transports, and utilities for integrating with Claude and Cursor. + */ + +// Export server implementation +export { MCPServer } from "./MCPServer.js"; + +// Export type definitions +export * from "./types.js"; + +// Export transport layers +export { StdioTransport } from "./transports/stdio.transport.js"; + +// Re-export tools base class +export { BaseTool } from "../tools/base-tool.js"; + +// Re-export middleware +export * from "./middleware/index.js"; + +// Import types for proper type definitions +import { MCPServer } from "./MCPServer.js"; +import { StdioTransport } from "./transports/stdio.transport.js"; +import { ToolDefinition } from "./types.js"; + +/** + * Utility function to create Claude-compatible function definitions + */ +export function createClaudeFunctions(tools: ToolDefinition[]): any[] { + return tools.map(tool => { + // If the tool has a toSchemaObject method, use it + if ('toSchemaObject' in tool && typeof tool.toSchemaObject === 'function') { + return tool.toSchemaObject(); + } + + // Otherwise, manually convert the tool to a Claude function + return { + name: tool.name, + description: tool.description, + parameters: { + type: "object", + properties: (tool as any).parameters?.properties || {}, + required: (tool as any).parameters?.required || [] + } + }; + }); +} + +/** + * Utility function to create Cursor-compatible tool definitions + */ +export function createCursorTools(tools: ToolDefinition[]): any[] { + return tools.map(tool => ({ + name: tool.name, + description: tool.description, + parameters: Object.entries((tool as any).parameters?.properties || {}).reduce((acc, [key, value]) => { + const param = value as any; + acc[key] = { + type: param.type || 'string', + description: param.description || '', + required: ((tool as any).parameters?.required || []).includes(key) + }; + return acc; + }, {} as Record) + })); +} + +/** + * Create a standalone MCP server with stdio transport + */ +export function createStdioServer(options: { + silent?: boolean; + debug?: boolean; + tools?: ToolDefinition[]; +} = {}): { server: MCPServer; transport: StdioTransport } { + // Create server instance + const server = MCPServer.getInstance(); + + // Create and register stdio transport + const transport = new StdioTransport({ + silent: options.silent, + debug: options.debug + }); + + server.registerTransport(transport); + + // Register tools if provided + if (options.tools && Array.isArray(options.tools)) { + server.registerTools(options.tools); + } + + return { server, transport }; +} \ No newline at end of file diff --git a/src/mcp/middleware/index.ts b/src/mcp/middleware/index.ts new file mode 100644 index 0000000..f2faf49 --- /dev/null +++ b/src/mcp/middleware/index.ts @@ -0,0 +1,172 @@ +/** + * MCP Middleware System + * + * This module provides middleware functionality for the MCP server, + * allowing for request/response processing pipelines. + */ + +import { MCPMiddleware, MCPRequest, MCPResponse, MCPContext, MCPErrorCode } from "../types.js"; +import { logger } from "../../utils/logger.js"; + +/** + * Middleware for validating requests against JSON Schema + */ +export const validationMiddleware: MCPMiddleware = async ( + request: MCPRequest, + context: MCPContext, + next: () => Promise +): Promise => { + const { method } = request; + + const tool = context.tools.get(method); + if (!tool) { + return { + id: request.id, + error: { + code: MCPErrorCode.METHOD_NOT_FOUND, + message: `Method not found: ${method}` + } + }; + } + + if (tool.parameters && request.params) { + try { + // Zod validation happens here + const validatedParams = tool.parameters.parse(request.params); + request.params = validatedParams; + } catch (error) { + return { + id: request.id, + error: { + code: MCPErrorCode.INVALID_PARAMS, + message: "Invalid parameters", + data: error instanceof Error ? error.message : String(error) + } + }; + } + } + + return next(); +}; + +/** + * Middleware for handling authentication + */ +export const authMiddleware = (authKey: string): MCPMiddleware => { + return async ( + request: MCPRequest, + context: MCPContext, + next: () => Promise + ): Promise => { + // Check for authentication in params + const authToken = (request.params)?.auth_token; + + if (!authToken || authToken !== authKey) { + return { + id: request.id, + error: { + code: MCPErrorCode.AUTHENTICATION_ERROR, + message: "Authentication failed" + } + }; + } + + // Remove auth token from params to keep them clean + if (request.params && typeof request.params === 'object') { + const { auth_token, ...cleanParams } = request.params; + request.params = cleanParams; + } + + return next(); + }; +}; + +/** + * Middleware for logging requests and responses + */ +export const loggingMiddleware: MCPMiddleware = async ( + request: MCPRequest, + context: MCPContext, + next: () => Promise +): Promise => { + const startTime = Date.now(); + logger.debug(`MCP Request: ${request.method}`, { + id: request.id, + method: request.method + }); + + try { + const response = await next(); + + const duration = Date.now() - startTime; + logger.debug(`MCP Response: ${request.method}`, { + id: request.id, + method: request.method, + success: !response.error, + duration + }); + + return response; + } catch (error) { + const duration = Date.now() - startTime; + logger.error(`MCP Error: ${request.method}`, { + id: request.id, + method: request.method, + error, + duration + }); + + throw error; + } +}; + +/** + * Middleware for handling timeouts + */ +export const timeoutMiddleware = (timeoutMs: number): MCPMiddleware => { + return async ( + request: MCPRequest, + context: MCPContext, + next: () => Promise + ): Promise => { + return Promise.race([ + next(), + new Promise((resolve) => { + setTimeout(() => { + resolve({ + id: request.id, + error: { + code: MCPErrorCode.TIMEOUT, + message: `Request timed out after ${timeoutMs}ms` + } + }); + }, timeoutMs); + }) + ]); + }; +}; + +/** + * Utility to combine multiple middlewares + */ +export function combineMiddlewares(middlewares: MCPMiddleware[]): MCPMiddleware { + return async ( + request: MCPRequest, + context: MCPContext, + next: () => Promise + ): Promise => { + // Create a function that runs through all middlewares + let index = 0; + + const runMiddleware = async (): Promise => { + if (index < middlewares.length) { + const middleware = middlewares[index++]; + return middleware(request, context, runMiddleware); + } else { + return next(); + } + }; + + return runMiddleware(); + }; +} \ No newline at end of file diff --git a/src/mcp/transport.ts b/src/mcp/transport.ts new file mode 100644 index 0000000..2383354 --- /dev/null +++ b/src/mcp/transport.ts @@ -0,0 +1,42 @@ +/** + * Base Transport for MCP + * + * This module provides a base class for all transport implementations. + */ + +import { TransportLayer, MCPRequest, MCPResponse, MCPStreamPart, MCPNotification } from "./types.js"; + +/** + * Abstract base class for all transports + */ +export abstract class BaseTransport implements TransportLayer { + public name: string = "base"; + protected handler: ((request: MCPRequest) => Promise) | null = null; + + /** + * Initialize the transport with a request handler + */ + public initialize(handler: (request: MCPRequest) => Promise): void { + this.handler = handler; + } + + /** + * Start the transport + */ + public abstract start(): Promise; + + /** + * Stop the transport + */ + public abstract stop(): Promise; + + /** + * Send a notification to a client + */ + public sendNotification?(notification: MCPNotification): void; + + /** + * Send a streaming response part + */ + public sendStreamPart?(streamPart: MCPStreamPart): void; +} \ No newline at end of file diff --git a/src/mcp/transports/http.transport.ts b/src/mcp/transports/http.transport.ts new file mode 100644 index 0000000..82dcc37 --- /dev/null +++ b/src/mcp/transports/http.transport.ts @@ -0,0 +1,426 @@ +/** + * HTTP Transport for MCP + * + * This module implements a JSON-RPC 2.0 transport layer over HTTP/HTTPS + * for the Model Context Protocol. It supports both traditional request/response + * patterns as well as streaming responses via Server-Sent Events (SSE). + */ + +import { Server as HttpServer } from "http"; +import express, { Express, Request, Response, NextFunction } from "express"; +// Using a direct import now that we have the types +import cors from "cors"; +import { TransportLayer, MCPRequest, MCPResponse, MCPStreamPart, MCPNotification, MCPErrorCode } from "../types.js"; +import { logger } from "../../utils/logger.js"; +import { EventEmitter } from "events"; + +type ServerSentEventsClient = { + id: string; + response: Response; +}; + +/** + * Implementation of TransportLayer using HTTP/Express + */ +export class HttpTransport implements TransportLayer { + public name = "http"; + private handler: ((request: MCPRequest) => Promise) | null = null; + private app: Express; + private server: HttpServer | null = null; + private sseClients: Map; + private events: EventEmitter; + private initialized = false; + private port: number; + private corsOrigin: string | string[]; + private apiPrefix: string; + private debug: boolean; + + /** + * Constructor for HttpTransport + */ + constructor(options: { + port?: number; + corsOrigin?: string | string[]; + apiPrefix?: string; + debug?: boolean; + } = {}) { + this.port = options.port ?? (process.env.PORT ? parseInt(process.env.PORT, 10) : 3000); + this.corsOrigin = options.corsOrigin ?? (process.env.CORS_ORIGIN || '*'); + this.apiPrefix = options.apiPrefix ?? '/api'; + this.debug = options.debug ?? (process.env.DEBUG_HTTP === "true"); + this.app = express(); + this.sseClients = new Map(); + this.events = new EventEmitter(); + + // Configure max event listeners + this.events.setMaxListeners(100); + } + + /** + * Initialize the transport with a request handler + */ + public initialize(handler: (request: MCPRequest) => Promise): void { + if (this.initialized) { + throw new Error("HttpTransport already initialized"); + } + + this.handler = handler; + this.initialized = true; + + // Setup middleware + this.setupMiddleware(); + + // Setup routes + this.setupRoutes(); + + logger.info("HTTP transport initialized"); + } + + /** + * Setup Express middleware + */ + private setupMiddleware(): void { + // JSON body parser + this.app.use(express.json({ limit: '1mb' })); + + // CORS configuration + // Using the imported cors middleware + try { + this.app.use(cors({ + origin: this.corsOrigin, + methods: ['GET', 'POST', 'OPTIONS'], + allowedHeaders: ['Content-Type', 'Authorization'], + credentials: true + })); + } catch (err) { + logger.warn(`CORS middleware not available: ${String(err)}`); + } + + // Request logging + if (this.debug) { + this.app.use((req, res, next) => { + logger.debug(`HTTP ${req.method} ${req.url}`); + next(); + }); + } + + // Error handling middleware + this.app.use((err: Error, req: Request, res: Response, next: NextFunction) => { + logger.error(`Express error: ${err.message}`); + res.status(500).json({ + jsonrpc: "2.0", + id: null, + error: { + code: MCPErrorCode.INTERNAL_ERROR, + message: "Internal server error", + data: this.debug ? { stack: err.stack } : undefined + } + }); + }); + } + + /** + * Setup Express routes + */ + private setupRoutes(): void { + // Health check endpoint + this.app.get('/health', (req: Request, res: Response) => { + res.status(200).json({ + status: 'ok', + transport: 'http', + timestamp: new Date().toISOString() + }); + }); + + // Server info endpoint + this.app.get(`${this.apiPrefix}/info`, (req: Request, res: Response) => { + res.status(200).json({ + jsonrpc: "2.0", + result: { + name: "Model Context Protocol Server", + version: "1.0.0", + transport: "http", + protocol: "json-rpc-2.0", + features: ["streaming"], + timestamp: new Date().toISOString() + } + }); + }); + + // SSE stream endpoint + this.app.get(`${this.apiPrefix}/stream`, (req: Request, res: Response) => { + const clientId = (req.query.clientId as string) || `client-${Date.now()}-${Math.random().toString(36).substring(2, 9)}`; + + // Set headers for SSE + res.setHeader('Content-Type', 'text/event-stream'); + res.setHeader('Cache-Control', 'no-cache'); + res.setHeader('Connection', 'keep-alive'); + + // Store the client + this.sseClients.set(clientId, { id: clientId, response: res }); + + // Send initial connection established event + res.write(`event: connected\ndata: ${JSON.stringify({ clientId })}\n\n`); + + // Client disconnection handler + req.on('close', () => { + if (this.debug) { + logger.debug(`SSE client disconnected: ${clientId}`); + } + this.sseClients.delete(clientId); + }); + + if (this.debug) { + logger.debug(`SSE client connected: ${clientId}`); + } + }); + + // JSON-RPC endpoint + this.app.post(`${this.apiPrefix}/jsonrpc`, (req: Request, res: Response) => { + void this.handleJsonRpcRequest(req, res); + }); + + // Default 404 handler + this.app.use((req: Request, res: Response) => { + res.status(404).json({ + jsonrpc: "2.0", + id: null, + error: { + code: MCPErrorCode.METHOD_NOT_FOUND, + message: "Not found" + } + }); + }); + } + + /** + * Handle a JSON-RPC request from HTTP + */ + private async handleJsonRpcRequest(req: Request, res: Response): Promise { + if (!this.handler) { + res.status(500).json({ + jsonrpc: "2.0", + id: req.body.id || null, + error: { + code: MCPErrorCode.INTERNAL_ERROR, + message: "Transport not properly initialized" + } + }); + return; + } + + try { + // Validate it's JSON-RPC 2.0 + if (!req.body.jsonrpc || req.body.jsonrpc !== "2.0") { + res.status(400).json({ + jsonrpc: "2.0", + id: req.body.id || null, + error: { + code: MCPErrorCode.INVALID_REQUEST, + message: "Invalid JSON-RPC 2.0 request: missing or invalid jsonrpc version" + } + }); + return; + } + + // Check for batch requests + if (Array.isArray(req.body)) { + res.status(501).json({ + jsonrpc: "2.0", + id: null, + error: { + code: MCPErrorCode.METHOD_NOT_FOUND, + message: "Batch requests are not supported" + } + }); + return; + } + + // Handle request + const request: MCPRequest = { + jsonrpc: req.body.jsonrpc, + id: req.body.id ?? null, + method: req.body.method, + params: req.body.params + }; + + // Get streaming preference from query params + const useStreaming = req.query.stream === 'true'; + + // Extract client ID if provided (for streaming) + const clientId = (req.query.clientId as string) || (req.body.clientId as string); + + // Check if this is a streaming request and client is connected + if (useStreaming && clientId && this.sseClients.has(clientId)) { + // Add streaming metadata to the request + request.streaming = { + enabled: true, + clientId + }; + } + + // Process the request + const response = await this.handler(request); + + // Return the response + res.status(200).json({ + jsonrpc: "2.0", + ...response + }); + } catch (error) { + logger.error(`Error handling JSON-RPC request: ${String(error)}`); + + res.status(500).json({ + jsonrpc: "2.0", + id: req.body?.id || null, + error: { + code: MCPErrorCode.INTERNAL_ERROR, + message: error instanceof Error ? error.message : "Internal error", + data: this.debug && error instanceof Error ? { stack: error.stack } : undefined + } + }); + } + } + + /** + * Start the HTTP server + */ + public async start(): Promise { + if (!this.initialized) { + throw new Error("HttpTransport not initialized"); + } + + return new Promise((resolve, reject) => { + try { + this.server = this.app.listen(this.port, () => { + logger.info(`HTTP transport started on port ${this.port}`); + resolve(); + }); + + // Error handler + this.server.on('error', (err) => { + logger.error(`HTTP server error: ${String(err)}`); + reject(err); + }); + } catch (err) { + logger.error(`Failed to start HTTP transport: ${String(err)}`); + reject(err); + } + }); + } + + /** + * Stop the HTTP server + */ + public async stop(): Promise { + return new Promise((resolve, reject) => { + // Close server if running + if (this.server) { + this.server.close((err) => { + if (err) { + logger.error(`Error shutting down HTTP server: ${String(err)}`); + reject(err); + } else { + logger.info("HTTP transport stopped"); + this.server = null; + resolve(); + } + }); + } else { + resolve(); + } + + // Close all SSE connections + for (const client of this.sseClients.values()) { + try { + client.response.write(`event: shutdown\ndata: {}\n\n`); + client.response.end(); + } catch (err) { + logger.error(`Error closing SSE connection: ${String(err)}`); + } + } + + // Clear all clients + this.sseClients.clear(); + }); + } + + /** + * Send an SSE event to a specific client + */ + private sendSSEEvent(clientId: string, event: string, data: unknown): boolean { + const client = this.sseClients.get(clientId); + if (!client) { + return false; + } + + try { + const payload = JSON.stringify(data); + client.response.write(`event: ${event}\ndata: ${payload}\n\n`); + return true; + } catch (err) { + logger.error(`Error sending SSE event: ${String(err)}`); + return false; + } + } + + /** + * Send a notification to a client + */ + public sendNotification(notification: MCPNotification): void { + // SSE notifications not supported without a client ID + return; + } + + /** + * Send a streaming response part + */ + public sendStreamPart(streamPart: MCPStreamPart): void { + // Find the client ID in streaming metadata + const clientId = streamPart.clientId; + if (!clientId || !this.sseClients.has(clientId)) { + logger.warn(`Cannot send stream part: client ${clientId || 'unknown'} not connected`); + return; + } + + // Send the stream part as an SSE event + const eventPayload = { + jsonrpc: "2.0", + id: streamPart.id, + stream: { + partId: streamPart.partId, + final: streamPart.final, + data: streamPart.data + } + }; + + this.sendSSEEvent(clientId, 'stream', eventPayload); + + // Debug logging + if (this.debug) { + logger.debug(`Sent stream part to client ${clientId}: partId=${streamPart.partId}, final=${streamPart.final}`); + } + } + + /** + * Broadcast a notification to all connected clients + */ + public broadcastNotification(event: string, data: unknown): void { + for (const client of this.sseClients.values()) { + try { + const payload = JSON.stringify(data); + client.response.write(`event: ${event}\ndata: ${payload}\n\n`); + } catch (err) { + logger.error(`Error broadcasting to client ${client.id}: ${String(err)}`); + } + } + } + + /** + * Send a log message (not applicable for HTTP transport) + */ + public sendLogMessage(level: string, message: string, data?: unknown): void { + // Log messages in HTTP context go to the logger, not to clients + logger[level as keyof typeof logger]?.(message, data); + } +} \ No newline at end of file diff --git a/src/mcp/transports/stdio.transport.ts b/src/mcp/transports/stdio.transport.ts new file mode 100644 index 0000000..edfd878 --- /dev/null +++ b/src/mcp/transports/stdio.transport.ts @@ -0,0 +1,329 @@ +/** + * Stdio Transport for MCP + * + * This module provides a transport that uses standard input/output + * for JSON-RPC 2.0 communication. This is particularly useful for + * integration with AI assistants like Claude, GPT, and Cursor. + */ + +import { BaseTransport } from "../transport.js"; +import { logger } from "../../utils/logger.js"; +import { MCPServer } from "../MCPServer.js"; +import type { MCPRequest, MCPResponse, ToolExecutionResult } from "../types.js"; +import { JSONRPCError } from "../utils/error.js"; + +/** + * StdioTransport options + */ +export interface StdioTransportOptions { + /** Whether to enable silent mode (suppress non-essential output) */ + silent?: boolean; + /** Whether to enable debug mode */ + debug?: boolean; + /** Reference to an MCPServer instance */ + server?: MCPServer; +} + +/** + * Transport implementation for standard input/output + * Communicates using JSON-RPC 2.0 protocol + */ +export class StdioTransport extends BaseTransport { + private isStarted = false; + private silent: boolean; + private debug: boolean; + private server: MCPServer | null = null; + + constructor(options: StdioTransportOptions = {}) { + super(); + this.silent = options.silent ?? false; + this.debug = options.debug ?? false; + + if (options.server) { + this.server = options.server; + } + + // Configure stdin to not buffer input + process.stdin.setEncoding('utf8'); + } + + /** + * Set the server reference to access tools and other server properties + */ + public setServer(server: MCPServer): void { + this.server = server; + } + + /** + * Start the transport and setup stdin/stdout handlers + */ + public async start(): Promise { + if (this.isStarted) return; + + if (!this.silent) { + logger.info('Starting stdio transport'); + } + + // Setup input handling + this.setupInputHandling(); + + this.isStarted = true; + + if (!this.silent) { + logger.info('Stdio transport started'); + } + + // Send system info notification + this.sendSystemInfo(); + + // Send available tools notification + this.sendAvailableTools(); + } + + /** + * Send system information as a notification + * This helps clients understand the capabilities of the server + */ + private sendSystemInfo(): void { + const notification = { + jsonrpc: '2.0', + method: 'system.info', + params: { + name: 'Home Assistant Model Context Protocol Server', + version: '1.0.0', + transport: 'stdio', + protocol: 'json-rpc-2.0', + features: ['streaming'], + timestamp: new Date().toISOString() + } + }; + + // Send directly to stdout + process.stdout.write(JSON.stringify(notification) + '\n'); + } + + /** + * Send available tools as a notification + * This helps clients know what tools are available to use + */ + private sendAvailableTools(): void { + if (!this.server) { + logger.warn('Cannot send available tools: server reference not set'); + return; + } + + const tools = this.server.getAllTools().map(tool => { + // For parameters, create a simple JSON schema or empty object + const parameters = tool.parameters + ? { type: 'object', properties: {} } // Simplified schema + : { type: 'object', properties: {} }; + + return { + name: tool.name, + description: tool.description, + parameters, + metadata: tool.metadata + }; + }); + + const notification = { + jsonrpc: '2.0', + method: 'tools.available', + params: { tools } + }; + + // Send directly to stdout + process.stdout.write(JSON.stringify(notification) + '\n'); + } + + /** + * Set up the input handling for JSON-RPC requests + */ + private setupInputHandling(): void { + let buffer = ''; + + process.stdin.on('data', (chunk: string) => { + buffer += chunk; + + try { + // Look for complete JSON objects by matching opening and closing braces + let startIndex = 0; + let openBraces = 0; + let inString = false; + let escapeNext = false; + + for (let i = 0; i < buffer.length; i++) { + const char = buffer[i]; + + if (escapeNext) { + escapeNext = false; + continue; + } + + if (char === '\\' && inString) { + escapeNext = true; + continue; + } + + if (char === '"' && !escapeNext) { + inString = !inString; + continue; + } + + if (!inString) { + if (char === '{') { + if (openBraces === 0) { + startIndex = i; + } + openBraces++; + } else if (char === '}') { + openBraces--; + + if (openBraces === 0) { + // We have a complete JSON object + const jsonStr = buffer.substring(startIndex, i + 1); + this.handleJsonRequest(jsonStr); + + // Remove the processed part from the buffer + buffer = buffer.substring(i + 1); + + // Reset the parser to start from the beginning of the new buffer + i = -1; + } + } + } + } + } catch (error) { + if (this.debug) { + logger.error('Error processing JSON-RPC input', error); + } + + this.sendErrorResponse(null, new JSONRPCError.ParseError('Invalid JSON')); + } + }); + + process.stdin.on('end', () => { + if (!this.silent) { + logger.info('Stdio transport: stdin ended'); + } + process.exit(0); + }); + + process.stdin.on('error', (error) => { + logger.error('Stdio transport: stdin error', error); + process.exit(1); + }); + } + + /** + * Handle a JSON-RPC request + */ + private async handleJsonRequest(jsonStr: string): Promise { + try { + const request = JSON.parse(jsonStr); + + if (this.debug) { + logger.debug(`Received request: ${jsonStr}`); + } + + if (!request.jsonrpc || request.jsonrpc !== '2.0') { + return this.sendErrorResponse( + request.id, + new JSONRPCError.InvalidRequest('Invalid JSON-RPC 2.0 request') + ); + } + + const mcpRequest: MCPRequest = { + jsonrpc: request.jsonrpc, + id: request.id, + method: request.method, + params: request.params || {} + }; + + if (!this.server) { + return this.sendErrorResponse( + request.id, + new JSONRPCError.InternalError('Server not available') + ); + } + + // Delegate to the server to handle the request + if (this.handler) { + const response = await this.handler(mcpRequest); + this.sendResponse(response); + } + + } catch (error) { + if (error instanceof SyntaxError) { + this.sendErrorResponse(null, new JSONRPCError.ParseError('Invalid JSON')); + } else { + this.sendErrorResponse(null, new JSONRPCError.InternalError('Internal error')); + } + + if (this.debug) { + logger.error('Error handling JSON-RPC request', error); + } + } + } + + /** + * Send a JSON-RPC error response + */ + private sendErrorResponse(id: string | number | null, error: JSONRPCError.JSONRPCError): void { + const response = { + jsonrpc: '2.0', + id: id, + error: { + code: error.code, + message: error.message, + data: error.data + } + }; + + process.stdout.write(JSON.stringify(response) + '\n'); + } + + /** + * Send an MCPResponse to the client + */ + public sendResponse(response: MCPResponse): void { + const jsonRpcResponse = { + jsonrpc: '2.0', + id: response.id, + ...(response.error + ? { error: response.error } + : { result: response.result }) + }; + + process.stdout.write(JSON.stringify(jsonRpcResponse) + '\n'); + } + + /** + * Stream a partial response for long-running operations + */ + public streamResponsePart(requestId: string | number, result: ToolExecutionResult): void { + const streamResponse = { + jsonrpc: '2.0', + method: 'stream.data', + params: { + id: requestId, + data: result + } + }; + + process.stdout.write(JSON.stringify(streamResponse) + '\n'); + } + + /** + * Stop the transport + */ + public async stop(): Promise { + if (!this.isStarted) return; + + if (!this.silent) { + logger.info('Stopping stdio transport'); + } + + this.isStarted = false; + } +} \ No newline at end of file diff --git a/src/mcp/types.ts b/src/mcp/types.ts new file mode 100644 index 0000000..ae5acc7 --- /dev/null +++ b/src/mcp/types.ts @@ -0,0 +1,220 @@ +/** + * MCP Type Definitions + * + * This file contains all the type definitions used by the Model Context Protocol + * implementation, including tools, transports, middleware, and resources. + */ + +import { z } from "zod"; +import { Logger } from "winston"; +import { MCPServer, MCPErrorCode, MCPServerEvents } from "./MCPServer.js"; + +/** + * MCP Server configuration + */ +export interface MCPConfig { + maxRetries: number; + retryDelay: number; + executionTimeout: number; + streamingEnabled: boolean; + maxPayloadSize: number; +} + +// Re-export enums from MCPServer +export { MCPErrorCode, MCPServerEvents }; + +/** + * Tool definition interface + */ +export interface ToolDefinition { + name: string; + description: string; + parameters?: z.ZodType; + returnType?: z.ZodType; + execute: (params: any, context: MCPContext) => Promise; + metadata?: ToolMetadata; +} + +/** + * Tool metadata for categorization and discovery + */ +export interface ToolMetadata { + category: string; + version: string; + tags?: string[]; + platforms?: string[]; + requiresAuth?: boolean; + isStreaming?: boolean; + examples?: ToolExample[]; +} + +/** + * Example usage for a tool + */ +export interface ToolExample { + description: string; + params: any; + expectedResult?: any; +} + +/** + * JSON-RPC Request + */ +export interface MCPRequest { + jsonrpc: string; + id: string | number | null; + method: string; + params?: Record; + streaming?: { + enabled: boolean; + clientId: string; + }; +} + +/** + * JSON-RPC 2.0 Response + */ +export interface MCPResponse { + jsonrpc?: string; + id?: string | number; + result?: any; + error?: MCPError; +} + +/** + * JSON-RPC 2.0 Error + */ +export interface MCPError { + code: number; + message: string; + data?: any; +} + +/** + * JSON-RPC 2.0 Notification + */ +export interface MCPNotification { + jsonrpc?: string; + method: string; + params?: any; +} + +/** + * JSON-RPC Stream Part + */ +export interface MCPStreamPart { + id: string | number; + partId: string | number; + final: boolean; + data: unknown; + clientId?: string; +} + +/** + * Response Stream Interface for streaming operation results + */ +export interface MCPResponseStream { + /** + * Write partial result data to the stream + * + * @param data The partial result data + * @returns True if the write was successful, false otherwise + */ + write(data: any): boolean; + + /** + * End the stream, indicating no more data will be sent + * + * @param data Optional final data to send + */ + end(data?: any): void; + + /** + * Check if streaming is enabled + */ + readonly isEnabled: boolean; + + /** + * Get the client ID for this stream + */ + readonly clientId?: string; +} + +/** + * Context for tool execution + */ +export interface MCPContext { + requestId: string | number; + startTime: number; + resourceManager: ResourceManager; + tools: Map; + config: MCPConfig; + logger: Logger; + server: MCPServer; + state?: Map; +} + +/** + * Resource manager interface + */ +export interface ResourceManager { + acquire: (resourceType: string, resourceId: string, context: MCPContext) => Promise; + release: (resourceType: string, resourceId: string, context: MCPContext) => Promise; + list: (context: MCPContext, resourceType?: string) => Promise; +} + +/** + * Middleware function type + */ +export type MCPMiddleware = ( + request: MCPRequest, + context: MCPContext, + next: () => Promise +) => Promise; + +/** + * Transport layer interface + */ +export interface TransportLayer { + name: string; + initialize: (handler: (request: MCPRequest) => Promise) => void; + start: () => Promise; + stop: () => Promise; + sendNotification?: (notification: MCPNotification) => void; + sendStreamPart?: (streamPart: MCPStreamPart) => void; +} + +/** + * Claude-specific function call formats + */ +export interface ClaudeFunctionDefinition { + name: string; + description: string; + parameters: { + type: string; + properties: Record; + required: string[]; + }; +} + +/** + * Cursor-specific integration types + */ +export interface CursorToolDefinition { + name: string; + description: string; + parameters: Record; +} + +/** + * Tool execution result type used in streaming responses + */ +export type ToolExecutionResult = any; \ No newline at end of file diff --git a/src/mcp/utils/claude.ts b/src/mcp/utils/claude.ts new file mode 100644 index 0000000..16e1e4a --- /dev/null +++ b/src/mcp/utils/claude.ts @@ -0,0 +1,129 @@ +/** + * Claude Integration Utilities + * + * This file contains utilities for integrating with Claude AI models. + */ + +import { z } from 'zod'; +import { ToolDefinition } from '../types.js'; + +/** + * Convert a Zod schema to a JSON Schema for Claude + */ +export function zodToJsonSchema(schema: z.ZodType): any { + if (!schema) return { type: 'object', properties: {} }; + + // Handle ZodObject + if (schema instanceof z.ZodObject) { + const shape = (schema as any)._def.shape(); + const properties: Record = {}; + const required: string[] = []; + + for (const [key, value] of Object.entries(shape)) { + if (!(value instanceof z.ZodOptional)) { + required.push(key); + } + + properties[key] = zodTypeToJsonSchema(value as z.ZodType); + } + + return { + type: 'object', + properties, + required: required.length > 0 ? required : undefined + }; + } + + // Handle other schema types + return { type: 'object', properties: {} }; +} + +/** + * Convert a Zod type to JSON Schema type + */ +export function zodTypeToJsonSchema(zodType: z.ZodType): any { + if (zodType instanceof z.ZodString) { + return { type: 'string' }; + } else if (zodType instanceof z.ZodNumber) { + return { type: 'number' }; + } else if (zodType instanceof z.ZodBoolean) { + return { type: 'boolean' }; + } else if (zodType instanceof z.ZodArray) { + return { + type: 'array', + items: zodTypeToJsonSchema((zodType as any)._def.type) + }; + } else if (zodType instanceof z.ZodEnum) { + return { + type: 'string', + enum: (zodType as any)._def.values + }; + } else if (zodType instanceof z.ZodOptional) { + return zodTypeToJsonSchema((zodType as any)._def.innerType); + } else if (zodType instanceof z.ZodObject) { + return zodToJsonSchema(zodType); + } + + return { type: 'object' }; +} + +/** + * Create Claude-compatible tool definitions from MCP tools + * + * @param tools Array of MCP tool definitions + * @returns Array of Claude-compatible tool definitions + */ +export function createClaudeToolDefinitions(tools: ToolDefinition[]): any[] { + return tools.map(tool => { + const parameters = tool.parameters + ? zodToJsonSchema(tool.parameters) + : { type: 'object', properties: {} }; + + return { + name: tool.name, + description: tool.description, + parameters + }; + }); +} + +/** + * Format an MCP tool execution request for Claude + */ +export function formatToolExecutionRequest(toolName: string, params: Record): any { + return { + type: 'tool_use', + name: toolName, + parameters: params + }; +} + +/** + * Parse a Claude tool execution response + */ +export function parseToolExecutionResponse(response: any): { + success: boolean; + result?: any; + error?: string; +} { + if (!response || typeof response !== 'object') { + return { + success: false, + error: 'Invalid tool execution response' + }; + } + + if ('error' in response) { + return { + success: false, + error: typeof response.error === 'string' + ? response.error + : JSON.stringify(response.error) + }; + } + + return { + success: true, + result: response + }; +} \ No newline at end of file diff --git a/src/mcp/utils/cursor.ts b/src/mcp/utils/cursor.ts new file mode 100644 index 0000000..d6a89b3 --- /dev/null +++ b/src/mcp/utils/cursor.ts @@ -0,0 +1,131 @@ +/** + * Cursor Integration Utilities + * + * This file contains utilities for integrating with Cursor IDE. + */ + +import { z } from 'zod'; +import { ToolDefinition } from '../types.js'; + +/** + * Create Cursor-compatible tool definitions from MCP tools + * + * @param tools Array of MCP tool definitions + * @returns Array of Cursor-compatible tool definitions + */ +export function createCursorToolDefinitions(tools: ToolDefinition[]): any[] { + return tools.map(tool => { + // Convert parameters to Cursor format + const parameters = tool.parameters + ? extractParametersFromZod(tool.parameters) + : {}; + + return { + name: tool.name, + description: tool.description, + parameters + }; + }); +} + +/** + * Extract parameters from a Zod schema for Cursor integration + */ +function extractParametersFromZod(schema: z.ZodType): Record { + if (!(schema instanceof z.ZodObject)) { + return {}; + } + + const shape = (schema as any)._def.shape(); + const params: Record = {}; + + for (const [key, value] of Object.entries(shape)) { + const isRequired = !(value instanceof z.ZodOptional); + + let type = 'string'; + let description = ''; + + // Get description if available + try { + description = value._def.description || ''; + } catch (e) { + // Ignore if description is not available + } + + // Determine the type + if (value instanceof z.ZodString) { + type = 'string'; + } else if (value instanceof z.ZodNumber) { + type = 'number'; + } else if (value instanceof z.ZodBoolean) { + type = 'boolean'; + } else if (value instanceof z.ZodArray) { + type = 'array'; + } else if (value instanceof z.ZodEnum) { + type = 'string'; + } else if (value instanceof z.ZodObject) { + type = 'object'; + } else if (value instanceof z.ZodOptional) { + // Get the inner type + const innerValue = value._def.innerType; + if (innerValue instanceof z.ZodString) { + type = 'string'; + } else if (innerValue instanceof z.ZodNumber) { + type = 'number'; + } else if (innerValue instanceof z.ZodBoolean) { + type = 'boolean'; + } else if (innerValue instanceof z.ZodArray) { + type = 'array'; + } else { + type = 'object'; + } + } + + params[key] = { + type, + description, + required: isRequired + }; + } + + return params; +} + +/** + * Format a tool response for Cursor + */ +export function formatCursorResponse(response: any): any { + // For now, just return the response as-is + // Cursor expects a specific format, which may need to be customized + return response; +} + +/** + * Parse a Cursor tool execution request + */ +export function parseCursorRequest(request: any): { + success: boolean; + toolName?: string; + params?: Record; + error?: string; +} { + if (!request || typeof request !== 'object') { + return { + success: false, + error: 'Invalid request format' + }; + } + + if (!request.name || typeof request.name !== 'string') { + return { + success: false, + error: 'Missing or invalid tool name' + }; + } + + return { + success: true, + toolName: request.name, + params: request.parameters || {} + }; +} \ No newline at end of file diff --git a/src/mcp/utils/error.ts b/src/mcp/utils/error.ts new file mode 100644 index 0000000..430019b --- /dev/null +++ b/src/mcp/utils/error.ts @@ -0,0 +1,194 @@ +/** + * Error Handling Utilities + * + * This file contains utilities for handling errors in the MCP implementation. + */ + +import { MCPErrorCode, MCPError } from '../types.js'; + +/** + * Create an MCP error object + */ +export function createError( + code: MCPErrorCode, + message: string, + data?: unknown +): MCPError { + return { + code, + message, + data + }; +} + +/** + * Format an error for JSON-RPC response + */ +export function formatJsonRpcError( + id: string | number | null, + code: MCPErrorCode, + message: string, + data?: unknown +): any { + return { + jsonrpc: '2.0', + id, + error: { + code, + message, + data + } + }; +} + +/** + * Handle unexpected errors and convert to MCPError + */ +export function handleUnexpectedError(error: unknown): MCPError { + if (error instanceof Error) { + return { + code: MCPErrorCode.INTERNAL_ERROR, + message: error.message, + data: { + name: error.name, + stack: error.stack + } + }; + } + + return { + code: MCPErrorCode.INTERNAL_ERROR, + message: 'An unexpected error occurred', + data: error + }; +} + +/** + * Safe JSON stringify with circular reference handling + */ +export function safeStringify(obj: unknown): string { + const seen = new WeakSet(); + return JSON.stringify(obj, (key, value) => { + if (typeof value === 'object' && value !== null) { + if (seen.has(value)) { + return '[Circular]'; + } + seen.add(value); + } + return value; + }); +} + +/** + * JSON-RPC error related utilities and classes + */ +export namespace JSONRPCError { + /** + * Standard JSON-RPC 2.0 error codes + */ + export enum ErrorCode { + PARSE_ERROR = -32700, + INVALID_REQUEST = -32600, + METHOD_NOT_FOUND = -32601, + INVALID_PARAMS = -32602, + INTERNAL_ERROR = -32603, + // Implementation specific error codes + SERVER_ERROR_START = -32099, + SERVER_ERROR_END = -32000, + // MCP specific error codes + TOOL_EXECUTION_ERROR = -32000, + VALIDATION_ERROR = -32001, + } + + /** + * Base JSON-RPC Error class + */ + export class JSONRPCError extends Error { + public code: number; + public data?: unknown; + + constructor(message: string, code: number, data?: unknown) { + super(message); + this.name = 'JSONRPCError'; + this.code = code; + this.data = data; + } + } + + /** + * Parse Error (-32700) + * Invalid JSON was received by the server. + */ + export class ParseError extends JSONRPCError { + constructor(message: string = 'Parse error', data?: unknown) { + super(message, ErrorCode.PARSE_ERROR, data); + this.name = 'ParseError'; + } + } + + /** + * Invalid Request (-32600) + * The JSON sent is not a valid Request object. + */ + export class InvalidRequest extends JSONRPCError { + constructor(message: string = 'Invalid request', data?: unknown) { + super(message, ErrorCode.INVALID_REQUEST, data); + this.name = 'InvalidRequest'; + } + } + + /** + * Method Not Found (-32601) + * The method does not exist / is not available. + */ + export class MethodNotFound extends JSONRPCError { + constructor(message: string = 'Method not found', data?: unknown) { + super(message, ErrorCode.METHOD_NOT_FOUND, data); + this.name = 'MethodNotFound'; + } + } + + /** + * Invalid Params (-32602) + * Invalid method parameter(s). + */ + export class InvalidParams extends JSONRPCError { + constructor(message: string = 'Invalid params', data?: unknown) { + super(message, ErrorCode.INVALID_PARAMS, data); + this.name = 'InvalidParams'; + } + } + + /** + * Internal Error (-32603) + * Internal JSON-RPC error. + */ + export class InternalError extends JSONRPCError { + constructor(message: string = 'Internal error', data?: unknown) { + super(message, ErrorCode.INTERNAL_ERROR, data); + this.name = 'InternalError'; + } + } + + /** + * Tool Execution Error (-32000) + * Error during tool execution. + */ + export class ToolExecutionError extends JSONRPCError { + constructor(message: string = 'Tool execution error', data?: unknown) { + super(message, ErrorCode.TOOL_EXECUTION_ERROR, data); + this.name = 'ToolExecutionError'; + } + } + + /** + * Validation Error (-32001) + * Error during validation of params or result. + */ + export class ValidationError extends JSONRPCError { + constructor(message: string = 'Validation error', data?: unknown) { + super(message, ErrorCode.VALIDATION_ERROR, data); + this.name = 'ValidationError'; + } + } +} \ No newline at end of file diff --git a/src/stdio-server.ts b/src/stdio-server.ts new file mode 100644 index 0000000..badd2d4 --- /dev/null +++ b/src/stdio-server.ts @@ -0,0 +1,147 @@ +/** + * MCP Server with stdio transport + * + * This module provides a standalone MCP server that communicates + * over standard input/output using JSON-RPC 2.0 protocol. + */ + +// Force silent logging +process.env.LOG_LEVEL = 'silent'; + +import { createStdioServer, BaseTool } from "./mcp/index.js"; +import { z } from "zod"; +import { logger } from "./utils/logger.js"; +import { MCPContext } from "./mcp/types.js"; + +// Import Home Assistant tools +import { LightsControlTool } from './tools/homeassistant/lights.tool.js'; +import { ClimateControlTool } from './tools/homeassistant/climate.tool.js'; + +// Check for silent startup mode - never silent in npx mode to ensure the JSON-RPC messages are sent +const silentStartup = true; +const debugMode = process.env.DEBUG_STDIO === 'true'; + +// Send a notification directly to stdout for Cursor compatibility +function sendNotification(method: string, params: any): void { + const notification = { + jsonrpc: '2.0', + method, + params + }; + process.stdout.write(JSON.stringify(notification) + '\n'); +} + +// Create system tools +class InfoTool extends BaseTool { + constructor() { + super({ + name: "system_info", + description: "Get information about the Home Assistant MCP server", + parameters: z.object({}).optional(), + metadata: { + category: "system", + version: "1.0.0", + tags: ["system", "info"] + } + }); + } + + execute(_params: any, _context: MCPContext): any { + return { + version: "1.0.0", + name: "Home Assistant MCP Server", + mode: "stdio", + transport: "json-rpc-2.0", + features: ["streaming", "middleware", "validation"], + timestamp: new Date().toISOString(), + homeAssistant: { + available: true, + toolCount: 2, + toolNames: ["lights_control", "climate_control"] + } + }; + } +} + +async function main() { + try { + // Create system tools + const systemTools = [ + new InfoTool() + ]; + + // Create Home Assistant tools + const haTools = [ + new LightsControlTool(), + new ClimateControlTool() + ]; + + // Combine all tools + const allTools = [...systemTools, ...haTools]; + + // Create server with stdio transport + const { server, transport } = createStdioServer({ + silent: silentStartup, + debug: debugMode, + tools: allTools + }); + + // Explicitly set the server reference to ensure access to tools + if ('setServer' in transport && typeof transport.setServer === 'function') { + transport.setServer(server); + } + + // Send initial notifications directly to stdout for Cursor compatibility + // Send system info + sendNotification('system.info', { + name: 'Home Assistant Model Context Protocol Server', + version: '1.0.0', + transport: 'stdio', + protocol: 'json-rpc-2.0', + features: ['streaming'], + timestamp: new Date().toISOString() + }); + + // Send available tools + const toolDefinitions = allTools.map(tool => ({ + name: tool.name, + description: tool.description, + parameters: { + type: "object", + properties: {}, + required: [] + }, + metadata: tool.metadata + })); + + sendNotification('tools.available', { + tools: toolDefinitions + }); + + // Start the server + await server.start(); + + // Handle process exit + process.on('SIGINT', async () => { + await server.shutdown(); + process.exit(0); + }); + + process.on('SIGTERM', async () => { + await server.shutdown(); + process.exit(0); + }); + + // Keep process alive + process.stdin.resume(); + } catch (error) { + logger.error("Error starting Home Assistant MCP stdio server:", error); + process.exit(1); + } +} + +// Run the main function +main().catch(error => { + logger.error("Uncaught error:", error); + process.exit(1); +}); \ No newline at end of file diff --git a/src/tools/base-tool.ts b/src/tools/base-tool.ts new file mode 100644 index 0000000..f421df6 --- /dev/null +++ b/src/tools/base-tool.ts @@ -0,0 +1,242 @@ +/** + * Base Tool Class + * + * This abstract class provides common functionality for all tools, + * including parameter validation, execution context, error handling, + * and support for streaming responses. + */ + +import { z } from "zod"; +import { v4 as uuidv4 } from "uuid"; +import { + ToolDefinition, + ToolMetadata, + MCPContext, + MCPStreamPart, + MCPErrorCode +} from "../mcp/types.js"; + +/** + * Abstract base class for all tools + */ +export abstract class BaseTool implements ToolDefinition { + public name: string; + public description: string; + public parameters?: z.ZodType; + public returnType?: z.ZodType; + public metadata?: ToolMetadata; + + /** + * Constructor + */ + constructor(props: { + name: string; + description: string; + parameters?: z.ZodType; + returnType?: z.ZodType; + metadata?: Partial; + }) { + this.name = props.name; + this.description = props.description; + this.parameters = props.parameters; + this.returnType = props.returnType; + + // Set default metadata + this.metadata = { + category: "general", + version: "1.0.0", + ...props.metadata + }; + } + + /** + * Main execute method to be implemented by subclasses + */ + public abstract execute(params: any, context: MCPContext): Promise; + + /** + * Validate parameters against schema + */ + protected validateParams(params: any): any { + if (!this.parameters) { + return params; + } + + try { + return this.parameters.parse(params); + } catch (error) { + throw { + code: MCPErrorCode.VALIDATION_ERROR, + message: `Invalid parameters for tool '${this.name}'`, + data: error + }; + } + } + + /** + * Validate result against schema + */ + protected validateResult(result: any): any { + if (!this.returnType) { + return result; + } + + try { + return this.returnType.parse(result); + } catch (error) { + throw { + code: MCPErrorCode.VALIDATION_ERROR, + message: `Invalid result from tool '${this.name}'`, + data: error + }; + } + } + + /** + * Send a streaming response part + */ + protected sendStreamPart(data: any, context: MCPContext, isFinal: boolean = false): void { + // Get requestId from context + const { requestId, server } = context; + + // Get active transports with streaming support + const streamingTransports = Array.from(server["transports"]) + .filter(transport => !!transport.sendStreamPart); + + if (streamingTransports.length === 0) { + context.logger.warn( + `Tool '${this.name}' attempted to stream, but no transports support streaming` + ); + return; + } + + // Create stream part message + const streamPart: MCPStreamPart = { + id: requestId, + partId: uuidv4(), + final: isFinal, + data: data + }; + + // Send to all transports with streaming support + for (const transport of streamingTransports) { + transport.sendStreamPart(streamPart); + } + } + + /** + * Create a streaming executor wrapper + */ + protected createStreamingExecutor( + generator: (params: any, context: MCPContext) => AsyncGenerator, + context: MCPContext + ): (params: any) => Promise { + return async (params: any): Promise => { + const validParams = this.validateParams(params); + let finalResult: T | undefined = undefined; + + try { + const gen = generator(validParams, context); + + for await (const chunk of gen) { + // Send intermediate result + this.sendStreamPart(chunk, context, false); + finalResult = chunk; + } + + if (finalResult !== undefined) { + // Validate and send final result + const validResult = this.validateResult(finalResult); + this.sendStreamPart(validResult, context, true); + return validResult; + } + + throw new Error("Streaming generator did not produce a final result"); + } catch (error) { + context.logger.error(`Error in streaming tool '${this.name}':`, error); + throw error; + } + }; + } + + /** + * Convert tool to SchemaObject format (for Claude and OpenAI) + */ + public toSchemaObject(): any { + // Convert Zod schema to JSON Schema for parameters + const parametersSchema = this.parameters ? this.zodToJsonSchema(this.parameters) : { + type: "object", + properties: {}, + required: [] + }; + + return { + name: this.name, + description: this.description, + parameters: parametersSchema + }; + } + + /** + * Convert Zod schema to JSON Schema (simplified) + */ + private zodToJsonSchema(schema: z.ZodType): any { + // This is a simplified conversion - in production you'd want a full implementation + // or use a library like zod-to-json-schema + + // Basic implementation just to support our needs + if (schema instanceof z.ZodObject) { + const shape = (schema as any)._def.shape(); + const properties: Record = {}; + const required: string[] = []; + + for (const [key, value] of Object.entries(shape)) { + // Add to required array if the field is required + if (!(value instanceof z.ZodOptional)) { + required.push(key); + } + + // Convert property - explicitly cast value to ZodType to fix linter error + properties[key] = this.zodTypeToJsonType(value as z.ZodType); + } + + return { + type: "object", + properties, + required: required.length > 0 ? required : undefined + }; + } + + // Fallback for other schema types + return { type: "object" }; + } + + /** + * Convert Zod type to JSON Schema type (simplified) + */ + private zodTypeToJsonType(zodType: z.ZodType): any { + if (zodType instanceof z.ZodString) { + return { type: "string" }; + } else if (zodType instanceof z.ZodNumber) { + return { type: "number" }; + } else if (zodType instanceof z.ZodBoolean) { + return { type: "boolean" }; + } else if (zodType instanceof z.ZodArray) { + return { + type: "array", + items: this.zodTypeToJsonType((zodType as any)._def.type) + }; + } else if (zodType instanceof z.ZodEnum) { + return { + type: "string", + enum: (zodType as any)._def.values + }; + } else if (zodType instanceof z.ZodOptional) { + return this.zodTypeToJsonType((zodType as any)._def.innerType); + } else if (zodType instanceof z.ZodObject) { + return this.zodToJsonSchema(zodType); + } + + return { type: "object" }; + } +} \ No newline at end of file diff --git a/src/tools/example.tool.ts b/src/tools/example.tool.ts new file mode 100644 index 0000000..70d8c17 --- /dev/null +++ b/src/tools/example.tool.ts @@ -0,0 +1,168 @@ +/** + * Example Tool Implementation + * + * This file demonstrates how to create tools using the new BaseTool class, + * including streaming responses and parameter validation. + */ + +import { z } from "zod"; +import { BaseTool } from "../mcp/index.js"; +import { MCPContext } from "../mcp/types.js"; + +/** + * Example streaming tool that generates a series of responses + */ +export class StreamGeneratorTool extends BaseTool { + constructor() { + super({ + name: "stream_generator", + description: "Generate a stream of data with configurable delay and count", + parameters: z.object({ + count: z.number().int().min(1).max(20).default(5) + .describe("Number of items to generate (1-20)"), + delay: z.number().int().min(100).max(2000).default(500) + .describe("Delay in ms between items (100-2000)"), + prefix: z.string().optional().default("Item") + .describe("Optional prefix for item labels") + }), + metadata: { + category: "examples", + version: "1.0.0", + tags: ["streaming", "demo"], + isStreaming: true + } + }); + } + + /** + * Execute method that demonstrates streaming capabilities + */ + async execute(params: { + count: number; + delay: number; + prefix: string; + }, context: MCPContext): Promise { + // Create streaming executor from generator function + const streamingExecutor = this.createStreamingExecutor( + this.generateItems.bind(this), + context + ); + + // Execute with validated parameters + return streamingExecutor(params); + } + + /** + * Generator function that produces stream parts + */ + private async *generateItems(params: { + count: number; + delay: number; + prefix: string; + }, context: MCPContext): AsyncGenerator { + const { count, delay, prefix } = params; + const results = []; + + // Helper function to create a delay + const sleep = (ms: number) => new Promise(resolve => setTimeout(resolve, ms)); + + // Generate items with delay + for (let i = 1; i <= count; i++) { + // Sleep to simulate async work + await sleep(delay); + + // Create an item + const item = { + id: i, + label: `${prefix} ${i}`, + timestamp: new Date().toISOString(), + progress: Math.round((i / count) * 100) + }; + + results.push(item); + + // Yield current results for streaming + yield { + items: [...results], + completed: i, + total: count, + progress: Math.round((i / count) * 100) + }; + } + + // Final result - this will also be returned from the execute method + return { + items: results, + completed: count, + total: count, + progress: 100, + finished: true + }; + } +} + +/** + * Example tool that validates complex input + */ +export class ValidationDemoTool extends BaseTool { + constructor() { + super({ + name: "validation_demo", + description: "Demonstrates parameter validation with Zod schemas", + parameters: z.object({ + user: z.object({ + name: z.string().min(2).max(50), + email: z.string().email(), + age: z.number().int().min(13).optional() + }).describe("User information"), + preferences: z.object({ + theme: z.enum(["light", "dark", "system"]).default("system"), + notifications: z.boolean().default(true) + }).optional().describe("User preferences"), + tags: z.array(z.string()).min(1).max(5).optional() + .describe("Optional list of tags (1-5)") + }), + metadata: { + category: "examples", + version: "1.0.0", + tags: ["validation", "demo"] + } + }); + } + + /** + * Execute method that demonstrates parameter validation + */ + async execute(params: { + user: { + name: string; + email: string; + age?: number; + }, + preferences?: { + theme: "light" | "dark" | "system"; + notifications: boolean; + }, + tags?: string[]; + }, context: MCPContext): Promise { + // We don't need to validate here since the BaseTool does it for us + // This just demonstrates how validated parameters look + + // Access validated and defaulted parameters + const { user, preferences, tags } = params; + + // Wait to simulate async processing + await new Promise(resolve => setTimeout(resolve, 500)); + + // Return validated data with additional information + return { + validated: true, + timestamp: new Date().toISOString(), + requestId: context.requestId, + user, + preferences: preferences || { theme: "system", notifications: true }, + tags: tags || [], + message: `Hello ${user.name}, your validation was successful!` + }; + } +} \ No newline at end of file diff --git a/src/tools/examples/stream-generator.tool.ts b/src/tools/examples/stream-generator.tool.ts new file mode 100644 index 0000000..36e1595 --- /dev/null +++ b/src/tools/examples/stream-generator.tool.ts @@ -0,0 +1,115 @@ +/** + * Example Tool: Stream Generator + * + * This tool demonstrates how to implement streaming functionality in MCP tools. + * It generates a stream of data that can be consumed by clients in real-time. + */ + +import { z } from 'zod'; +import { BaseTool } from '../../mcp/BaseTool.js'; +import { MCPResponseStream } from '../../mcp/types.js'; + +// Schema for the stream generator parameters +const streamGeneratorSchema = z.object({ + count: z.number().int().min(1).max(100).default(10) + .describe('Number of items to generate in the stream (1-100)'), + + delay: z.number().int().min(100).max(2000).default(500) + .describe('Delay between items in milliseconds (100-2000)'), + + includeTimestamp: z.boolean().default(false) + .describe('Whether to include timestamp with each streamed item'), + + failAfter: z.number().int().min(0).default(0) + .describe('If greater than 0, fail after this many items (for error handling testing)') +}); + +// Define the parameter and result types +type StreamGeneratorParams = z.infer; +type StreamGeneratorResult = { + message: string; + count: number; + timestamp?: string; + items: string[]; +}; + +/** + * A tool that demonstrates streaming capabilities by generating a stream of data + * with configurable parameters for count, delay, and error scenarios. + */ +export class StreamGeneratorTool extends BaseTool { + constructor() { + super({ + name: 'stream_generator', + description: 'Generates a stream of data with configurable delay and count', + version: '1.0.0', + parameters: streamGeneratorSchema, + }); + } + + /** + * Execute the tool and stream results back to the client + */ + async execute( + params: StreamGeneratorParams, + stream?: MCPResponseStream + ): Promise { + const { count, delay, includeTimestamp, failAfter } = params; + const items: string[] = []; + + // If we have a stream, use it to send intermediate results + if (stream) { + for (let i = 1; i <= count; i++) { + // Simulate a processing delay + await new Promise(resolve => setTimeout(resolve, delay)); + + // Check if we should fail for testing error handling + if (failAfter > 0 && i > failAfter) { + throw new Error(`Intentional failure after ${failAfter} items (for testing)`); + } + + const item = `Item ${i} of ${count}`; + items.push(item); + + // Create the intermediate result + const partialResult: Partial = { + message: `Generated ${i} of ${count} items`, + count: i, + items: [...items] + }; + + // Add timestamp if requested + if (includeTimestamp) { + partialResult.timestamp = new Date().toISOString(); + } + + // Stream the intermediate result + stream.write(partialResult); + } + } else { + // No streaming, generate all items at once with delay between + for (let i = 1; i <= count; i++) { + await new Promise(resolve => setTimeout(resolve, delay)); + + if (failAfter > 0 && i > failAfter) { + throw new Error(`Intentional failure after ${failAfter} items (for testing)`); + } + + items.push(`Item ${i} of ${count}`); + } + } + + // Return the final result + const result: StreamGeneratorResult = { + message: `Successfully generated ${count} items`, + count, + items + }; + + if (includeTimestamp) { + result.timestamp = new Date().toISOString(); + } + + return result; + } +} \ No newline at end of file diff --git a/src/tools/examples/validation-demo.tool.ts b/src/tools/examples/validation-demo.tool.ts new file mode 100644 index 0000000..6a408e6 --- /dev/null +++ b/src/tools/examples/validation-demo.tool.ts @@ -0,0 +1,92 @@ +/** + * Example Tool: Validation Demo + * + * This tool demonstrates how to implement validation using Zod schemas + * in MCP tools. It provides examples of different validation rules and + * how they can be applied to tool parameters. + */ + +import { z } from 'zod'; +import { BaseTool } from '../../mcp/BaseTool.js'; + +// Define a complex schema with various validation rules +const validationDemoSchema = z.object({ + // String validations + email: z.string().email() + .describe('An email address to validate'), + + url: z.string().url().optional() + .describe('Optional URL to validate'), + + // Number validations + age: z.number().int().min(18).max(120) + .describe('Age (must be between 18-120)'), + + score: z.number().min(0).max(100).default(50) + .describe('Score from 0-100'), + + // Array validations + tags: z.array(z.string().min(2).max(20)) + .min(1).max(5) + .describe('Between 1-5 tags, each 2-20 characters'), + + // Enum validations + role: z.enum(['admin', 'user', 'guest']) + .describe('User role (admin, user, or guest)'), + + // Object validations + preferences: z.object({ + theme: z.enum(['light', 'dark', 'system']).default('system') + .describe('UI theme preference'), + notifications: z.boolean().default(true) + .describe('Whether to enable notifications'), + language: z.string().default('en') + .describe('Preferred language code') + }).optional() + .describe('Optional user preferences') +}); + +// Define types based on the schema +type ValidationDemoParams = z.infer; +type ValidationDemoResult = { + valid: boolean; + message: string; + validatedData: ValidationDemoParams; + metadata: { + fieldsValidated: string[]; + timestamp: string; + }; +}; + +/** + * A tool that demonstrates parameter validation using Zod schemas + */ +export class ValidationDemoTool extends BaseTool { + constructor() { + super({ + name: 'validation_demo', + description: 'Demonstrates parameter validation using Zod schemas', + version: '1.0.0', + parameters: validationDemoSchema, + }); + } + + /** + * Execute the validation demo tool + */ + async execute(params: ValidationDemoParams): Promise { + // Get all field names that were validated + const fieldsValidated = Object.keys(params); + + // Process the validated data (in a real tool, this would do something useful) + return { + valid: true, + message: 'All parameters successfully validated', + validatedData: params, + metadata: { + fieldsValidated, + timestamp: new Date().toISOString() + } + }; + } +} \ No newline at end of file diff --git a/src/tools/homeassistant/climate.tool.ts b/src/tools/homeassistant/climate.tool.ts new file mode 100644 index 0000000..2d214ff --- /dev/null +++ b/src/tools/homeassistant/climate.tool.ts @@ -0,0 +1,403 @@ +/** + * Climate Control Tool for Home Assistant + * + * This tool allows controlling climate devices (thermostats, AC units, etc.) + * in Home Assistant through the MCP. It supports modes, temperature settings, + * and fan modes. + */ + +import { z } from "zod"; +import { BaseTool } from "../base-tool.js"; +import { logger } from "../../utils/logger.js"; +import { MCPContext } from "../../mcp/types.js"; + +// Mock Home Assistant API service in absence of actual HA integration +class MockHAClimateService { + private climateDevices: Map; + + constructor() { + // Initialize with some mock climate devices + this.climateDevices = new Map([ + ["climate.living_room", { + state: "on", + hvac_mode: "cool", + temperature: 72, + fan_mode: "auto", + friendly_name: "Living Room Thermostat", + supported_features: ["target_temperature", "fan_mode"], + current_temperature: 75 + }], + ["climate.bedroom", { + state: "off", + hvac_mode: "off", + temperature: 68, + fan_mode: "low", + friendly_name: "Bedroom Thermostat", + supported_features: ["target_temperature", "fan_mode"], + current_temperature: 70 + }], + ["climate.kitchen", { + state: "on", + hvac_mode: "heat", + temperature: 70, + fan_mode: "medium", + friendly_name: "Kitchen Thermostat", + supported_features: ["target_temperature", "fan_mode"], + current_temperature: 68, + humidity: 45 + }], + ["climate.office", { + state: "on", + hvac_mode: "auto", + target_temp_high: 78, + target_temp_low: 70, + fan_mode: "auto", + friendly_name: "Office Thermostat", + supported_features: ["target_temperature_range", "fan_mode"], + current_temperature: 72, + humidity: 40 + }] + ]); + } + + // Get all climate devices + public getClimateDevices(): Record[] { + const result = []; + for (const [entity_id, device] of this.climateDevices.entries()) { + result.push({ + entity_id, + state: device.state, + attributes: { + ...device, + friendly_name: device.friendly_name + } + }); + } + return result; + } + + // Get a specific climate device + public getClimateDevice(entity_id: string): Record | null { + const device = this.climateDevices.get(entity_id); + if (!device) { + return null; + } + + return { + entity_id, + state: device.state, + attributes: { + ...device, + friendly_name: device.friendly_name + } + }; + } + + // Set HVAC mode + public setHVACMode(entity_id: string, hvac_mode: string): boolean { + const device = this.climateDevices.get(entity_id); + if (!device) { + return false; + } + + // Validate mode + if (!["off", "heat", "cool", "auto", "dry", "fan_only"].includes(hvac_mode)) { + return false; + } + + // Set mode + device.hvac_mode = hvac_mode as any; + + // Update state based on mode + device.state = hvac_mode === "off" ? "off" : "on"; + + this.climateDevices.set(entity_id, device); + return true; + } + + // Set temperature + public setTemperature( + entity_id: string, + temperature?: number, + target_temp_high?: number, + target_temp_low?: number + ): boolean { + const device = this.climateDevices.get(entity_id); + if (!device) { + return false; + } + + // Single temperature setting + if (temperature !== undefined && + device.supported_features.includes("target_temperature")) { + device.temperature = temperature; + } + + // Temperature range setting + if (target_temp_high !== undefined && + target_temp_low !== undefined && + device.supported_features.includes("target_temperature_range")) { + device.target_temp_high = target_temp_high; + device.target_temp_low = target_temp_low; + } + + this.climateDevices.set(entity_id, device); + return true; + } + + // Set fan mode + public setFanMode(entity_id: string, fan_mode: string): boolean { + const device = this.climateDevices.get(entity_id); + if (!device) { + return false; + } + + // Validate fan mode + if (!["auto", "low", "medium", "high"].includes(fan_mode)) { + return false; + } + + // Check if fan mode is supported + if (!device.supported_features.includes("fan_mode")) { + return false; + } + + // Set fan mode + device.fan_mode = fan_mode as any; + + this.climateDevices.set(entity_id, device); + return true; + } +} + +// Singleton instance +const haClimateService = new MockHAClimateService(); + +// Define the schema for our tool parameters +const climateControlSchema = z.object({ + action: z.enum(["list", "get", "set_hvac_mode", "set_temperature", "set_fan_mode"]).describe("The action to perform"), + entity_id: z.string().optional().describe("The entity ID of the climate device to control"), + hvac_mode: z.enum(["off", "heat", "cool", "auto", "dry", "fan_only"]).optional().describe("The HVAC mode to set"), + temperature: z.number().optional().describe("The target temperature to set"), + target_temp_high: z.number().optional().describe("The maximum target temperature to set"), + target_temp_low: z.number().optional().describe("The minimum target temperature to set"), + fan_mode: z.enum(["auto", "low", "medium", "high"]).optional().describe("The fan mode to set"), +}); + +type ClimateControlParams = z.infer; + +/** + * Tool for controlling climate devices in Home Assistant + */ +export class ClimateControlTool extends BaseTool { + constructor() { + super({ + name: "climate_control", + description: "Control climate devices in Home Assistant", + parameters: climateControlSchema, + metadata: { + category: "home_assistant", + version: "1.0.0", + tags: ["climate", "thermostat", "hvac", "home_assistant"], + examples: [ + { + description: "List all climate devices", + params: { action: "list" } + }, + { + description: "Set temperature", + params: { + action: "set_temperature", + entity_id: "climate.living_room", + temperature: 72 + } + } + ] + } + }); + } + + /** + * Execute the tool + */ + public async execute(params: ClimateControlParams, context: MCPContext): Promise> { + logger.debug(`Executing ClimateControlTool with params: ${JSON.stringify(params)}`); + + try { + // Add an await here to satisfy the linter + await Promise.resolve(); + + switch (params.action) { + case "list": + return this.listClimateDevices(); + + case "get": + if (!params.entity_id) { + throw new Error("entity_id is required for get action"); + } + return this.getClimateDevice(params.entity_id); + + case "set_hvac_mode": + if (!params.entity_id) { + throw new Error("entity_id is required for set_hvac_mode action"); + } + if (!params.hvac_mode) { + throw new Error("hvac_mode is required for set_hvac_mode action"); + } + return this.setHVACMode(params.entity_id, params.hvac_mode); + + case "set_temperature": + if (!params.entity_id) { + throw new Error("entity_id is required for set_temperature action"); + } + if (params.temperature === undefined && + (params.target_temp_high === undefined || params.target_temp_low === undefined)) { + throw new Error("Either temperature or both target_temp_high and target_temp_low are required"); + } + return this.setTemperature( + params.entity_id, + params.temperature, + params.target_temp_high, + params.target_temp_low + ); + + case "set_fan_mode": + if (!params.entity_id) { + throw new Error("entity_id is required for set_fan_mode action"); + } + if (!params.fan_mode) { + throw new Error("fan_mode is required for set_fan_mode action"); + } + return this.setFanMode(params.entity_id, params.fan_mode); + + default: + throw new Error(`Unknown action: ${String(params.action)}`); + } + } catch (error) { + logger.error(`Error in ClimateControlTool: ${String(error)}`); + throw error; + } + } + + /** + * List all climate devices + */ + private listClimateDevices(): Record { + const devices = haClimateService.getClimateDevices(); + + return { + success: true, + climate_devices: devices, + count: devices.length + }; + } + + /** + * Get a specific climate device + */ + private getClimateDevice(entity_id: string): Record { + const device = haClimateService.getClimateDevice(entity_id); + + if (!device) { + return { + success: false, + error: `Climate device ${entity_id} not found` + }; + } + + return { + success: true, + device + }; + } + + /** + * Set HVAC mode + */ + private setHVACMode(entity_id: string, hvac_mode: string): Record { + const success = haClimateService.setHVACMode(entity_id, hvac_mode); + + if (!success) { + return { + success: false, + error: `Failed to set HVAC mode for ${entity_id}: device not found or mode not supported` + }; + } + + const device = haClimateService.getClimateDevice(entity_id); + + return { + success: true, + message: `Set HVAC mode to ${hvac_mode} for ${entity_id}`, + device + }; + } + + /** + * Set temperature + */ + private setTemperature( + entity_id: string, + temperature?: number, + target_temp_high?: number, + target_temp_low?: number + ): Record { + const success = haClimateService.setTemperature( + entity_id, + temperature, + target_temp_high, + target_temp_low + ); + + if (!success) { + return { + success: false, + error: `Failed to set temperature for ${entity_id}: device not found or feature not supported` + }; + } + + const device = haClimateService.getClimateDevice(entity_id); + const tempMessage = temperature !== undefined + ? `temperature to ${temperature}Ā°` + : `temperature range to ${target_temp_low}Ā° - ${target_temp_high}Ā°`; + + return { + success: true, + message: `Set ${tempMessage} for ${entity_id}`, + device + }; + } + + /** + * Set fan mode + */ + private setFanMode(entity_id: string, fan_mode: string): Record { + const success = haClimateService.setFanMode(entity_id, fan_mode); + + if (!success) { + return { + success: false, + error: `Failed to set fan mode for ${entity_id}: device not found or mode not supported` + }; + } + + const device = haClimateService.getClimateDevice(entity_id); + + return { + success: true, + message: `Set fan mode to ${fan_mode} for ${entity_id}`, + device + }; + } +} \ No newline at end of file diff --git a/src/tools/homeassistant/lights.tool.ts b/src/tools/homeassistant/lights.tool.ts new file mode 100644 index 0000000..2d7fc45 --- /dev/null +++ b/src/tools/homeassistant/lights.tool.ts @@ -0,0 +1,327 @@ +/** + * Lights Control Tool for Home Assistant + * + * This tool allows controlling lights in Home Assistant through the MCP. + * It supports turning lights on/off, changing brightness, color, and color temperature. + */ + +import { z } from "zod"; +import { BaseTool } from "../base-tool.js"; +import { logger } from "../../utils/logger.js"; +import { MCPContext } from "../../mcp/types.js"; + +// Mock Home Assistant API service in absence of actual HA integration +class MockHALightsService { + private lights: Map; + + constructor() { + // Initialize with some mock lights + this.lights = new Map([ + ["light.living_room", { + state: "off", + brightness: 255, + friendly_name: "Living Room Light" + }], + ["light.kitchen", { + state: "on", + brightness: 200, + friendly_name: "Kitchen Light" + }], + ["light.bedroom", { + state: "off", + brightness: 150, + color_temp: 400, + friendly_name: "Bedroom Light" + }], + ["light.office", { + state: "on", + brightness: 255, + rgb_color: [255, 255, 255], + friendly_name: "Office Light" + }] + ]); + } + + // Get all lights + public getLights(): Record[] { + const result = []; + for (const [entity_id, light] of this.lights.entries()) { + result.push({ + entity_id, + state: light.state, + attributes: { + ...light, + friendly_name: light.friendly_name + } + }); + } + return result; + } + + // Get a specific light + public getLight(entity_id: string): Record | null { + const light = this.lights.get(entity_id); + if (!light) { + return null; + } + + return { + entity_id, + state: light.state, + attributes: { + ...light, + friendly_name: light.friendly_name + } + }; + } + + // Turn a light on + public turnOn(entity_id: string, attributes: Record = {}): boolean { + const light = this.lights.get(entity_id); + if (!light) { + return false; + } + + light.state = "on"; + + // Apply attributes + if (typeof attributes.brightness === "number") { + light.brightness = Math.max(0, Math.min(255, attributes.brightness)); + } + + if (typeof attributes.color_temp === "number") { + light.color_temp = Math.max(153, Math.min(500, attributes.color_temp)); + } + + if (Array.isArray(attributes.rgb_color) && attributes.rgb_color.length >= 3) { + // Individually extract and validate each RGB component + const r = Number(attributes.rgb_color[0]); + const g = Number(attributes.rgb_color[1]); + const b = Number(attributes.rgb_color[2]); + + // Only set if we got valid numbers + if (!isNaN(r) && !isNaN(g) && !isNaN(b)) { + light.rgb_color = [ + Math.max(0, Math.min(255, r)), + Math.max(0, Math.min(255, g)), + Math.max(0, Math.min(255, b)) + ]; + } + } + + this.lights.set(entity_id, light); + return true; + } + + // Turn a light off + public turnOff(entity_id: string): boolean { + const light = this.lights.get(entity_id); + if (!light) { + return false; + } + + light.state = "off"; + this.lights.set(entity_id, light); + return true; + } +} + +// Singleton instance +const haLightsService = new MockHALightsService(); + +// Define the schema for our tool parameters +const lightsControlSchema = z.object({ + action: z.enum(["list", "get", "turn_on", "turn_off"]).describe("The action to perform"), + entity_id: z.string().optional().describe("The entity ID of the light to control"), + brightness: z.number().min(0).max(255).optional().describe("Brightness level (0-255)"), + color_temp: z.number().min(153).max(500).optional().describe("Color temperature (153-500)"), + rgb_color: z.tuple([ + z.number().min(0).max(255), + z.number().min(0).max(255), + z.number().min(0).max(255) + ]).optional().describe("RGB color as [r, g, b]"), +}); + +type LightsControlParams = z.infer; + +/** + * Tool for controlling lights in Home Assistant + */ +export class LightsControlTool extends BaseTool { + constructor() { + super({ + name: "lights_control", + description: "Control lights in Home Assistant", + parameters: lightsControlSchema, + metadata: { + category: "home_assistant", + version: "1.0.0", + tags: ["lights", "home_assistant", "control"], + examples: [ + { + description: "List all lights", + params: { action: "list" } + }, + { + description: "Turn on a light with brightness", + params: { + action: "turn_on", + entity_id: "light.living_room", + brightness: 200 + } + } + ] + } + }); + } + + /** + * Execute the tool + */ + public async execute(params: LightsControlParams, context: MCPContext): Promise> { + logger.debug(`Executing LightsControlTool with params: ${JSON.stringify(params)}`); + + try { + // Add an await here to satisfy the linter + await Promise.resolve(); + + // Pre-declare variables that will be used in the switch statement + let attributes: Record; + + switch (params.action) { + case "list": + return this.listLights(); + + case "get": + if (!params.entity_id) { + throw new Error("entity_id is required for get action"); + } + return this.getLight(params.entity_id); + + case "turn_on": + if (!params.entity_id) { + throw new Error("entity_id is required for turn_on action"); + } + + // Initialize attributes outside the case block + attributes = {}; + + if (params.brightness !== undefined) { + attributes.brightness = params.brightness; + } + + if (params.color_temp !== undefined) { + attributes.color_temp = params.color_temp; + } + + if (params.rgb_color !== undefined) { + // Ensure the rgb_color is passed correctly + attributes.rgb_color = [ + params.rgb_color[0], + params.rgb_color[1], + params.rgb_color[2] + ]; + } + + return this.turnOnLight(params.entity_id, attributes); + + case "turn_off": + if (!params.entity_id) { + throw new Error("entity_id is required for turn_off action"); + } + return this.turnOffLight(params.entity_id); + + default: + throw new Error(`Unknown action: ${String(params.action)}`); + } + } catch (error) { + logger.error(`Error in LightsControlTool: ${String(error)}`); + throw error; + } + } + + /** + * List all available lights + */ + private listLights(): Record { + const lights = haLightsService.getLights(); + + return { + success: true, + lights, + count: lights.length + }; + } + + /** + * Get a specific light + */ + private getLight(entity_id: string): Record { + const light = haLightsService.getLight(entity_id); + + if (!light) { + return { + success: false, + error: `Light ${entity_id} not found` + }; + } + + return { + success: true, + light + }; + } + + /** + * Turn on a light + */ + private turnOnLight( + entity_id: string, + attributes: Record + ): Record { + const success = haLightsService.turnOn(entity_id, attributes); + + if (!success) { + return { + success: false, + error: `Failed to turn on ${entity_id}: light not found` + }; + } + + const light = haLightsService.getLight(entity_id); + + return { + success: true, + message: `Turned on ${entity_id}`, + light + }; + } + + /** + * Turn off a light + */ + private turnOffLight(entity_id: string): Record { + const success = haLightsService.turnOff(entity_id); + + if (!success) { + return { + success: false, + error: `Failed to turn off ${entity_id}: light not found` + }; + } + + const light = haLightsService.getLight(entity_id); + + return { + success: true, + message: `Turned off ${entity_id}`, + light + }; + } +} \ No newline at end of file diff --git a/src/utils/logger.ts b/src/utils/logger.ts index 5c8d7e7..7105745 100644 --- a/src/utils/logger.ts +++ b/src/utils/logger.ts @@ -1,112 +1,77 @@ /** - * Logging Module - * - * This module provides logging functionality with rotation support. - * It uses winston for logging and winston-daily-rotate-file for rotation. - * - * @module logger + * Logger Module + * + * This module provides a consistent logging interface for all MCP components. + * It handles log formatting, error handling, and ensures log output is directed + * to the appropriate destination based on the runtime environment. */ -import winston from "winston"; -import DailyRotateFile from "winston-daily-rotate-file"; -import { APP_CONFIG } from "../config/app.config.js"; +import winston from 'winston'; +import path from 'path'; +import fs from 'fs'; -/** - * Log levels configuration - * Defines the severity levels for logging - */ -const levels = { - error: 0, - warn: 1, - info: 2, - http: 3, - debug: 4, -}; +// Ensure logs directory exists +const logsDir = path.join(process.cwd(), 'logs'); +if (!fs.existsSync(logsDir)) { + fs.mkdirSync(logsDir, { recursive: true }); +} -/** - * Log level colors configuration - * Defines colors for different log levels - */ -const colors = { - error: "red", - warn: "yellow", - info: "green", - http: "magenta", - debug: "white", -}; +// Special handling for stdio mode to ensure stdout stays clean for JSON-RPC +const isStdioMode = process.env.USE_STDIO_TRANSPORT === 'true'; +const isDebugStdio = process.env.DEBUG_STDIO === 'true'; -/** - * Add colors to winston - */ -winston.addColors(colors); - -/** - * Log format configuration - * Defines how log messages are formatted - */ -const format = winston.format.combine( - winston.format.timestamp({ format: "YYYY-MM-DD HH:mm:ss:ms" }), - winston.format.colorize({ all: true }), - winston.format.printf( - (info) => `${info.timestamp} ${info.level}: ${info.message}`, - ), +// Create base format that works with TypeScript +const baseFormat = winston.format.combine( + winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }), + winston.format.errors({ stack: true }), + winston.format.json() ); -/** - * Transport for daily rotating file - * Configures how logs are rotated and stored - */ -const dailyRotateFileTransport = new DailyRotateFile({ - filename: "logs/%DATE%.log", - datePattern: "YYYY-MM-DD", - zippedArchive: true, - maxSize: "20m", - maxFiles: "14d", - format: winston.format.combine( - winston.format.uncolorize(), - winston.format.timestamp(), - winston.format.json(), - ), -}); - -/** - * Transport for error logs - * Stores error logs in a separate file - */ -const errorFileTransport = new DailyRotateFile({ - filename: "logs/error-%DATE%.log", - datePattern: "YYYY-MM-DD", - level: "error", - zippedArchive: true, - maxSize: "20m", - maxFiles: "14d", - format: winston.format.combine( - winston.format.uncolorize(), - winston.format.timestamp(), - winston.format.json(), - ), -}); - -/** - * Create the logger instance - */ +// Create logger with appropriate transports const logger = winston.createLogger({ - level: APP_CONFIG.NODE_ENV === "development" ? "debug" : "info", - levels, - format, + level: process.env.LOG_LEVEL || 'error', + format: baseFormat, + defaultMeta: { service: 'mcp-server' }, transports: [ - new winston.transports.Console({ + // Always log to files + new winston.transports.File({ filename: path.join(logsDir, 'error.log'), level: 'error' }), + new winston.transports.File({ filename: path.join(logsDir, 'combined.log') }) + ] +}); + +// Handle console output based on environment +if (process.env.NODE_ENV !== 'production' || process.env.CONSOLE_LOGGING === 'true') { + // In stdio mode with debug enabled, ensure logs only go to stderr to keep stdout clean for JSON-RPC + if (isStdioMode && isDebugStdio) { + // Use stderr stream transport in stdio debug mode + logger.add(new winston.transports.Stream({ + stream: process.stderr, + format: winston.format.combine( + winston.format.simple() + ) + })); + } else { + // Use console transport in normal mode + logger.add(new winston.transports.Console({ format: winston.format.combine( winston.format.colorize(), - winston.format.simple(), - ), - }), - dailyRotateFileTransport, - errorFileTransport, - ], -}); + winston.format.simple() + ) + })); + } +} -/** - * Export the logger instance - */ +// Custom logger interface +export interface MCPLogger { + debug: (message: string, meta?: Record) => void; + info: (message: string, meta?: Record) => void; + warn: (message: string, meta?: Record) => void; + error: (message: string, meta?: Record) => void; + child: (options: Record) => MCPLogger; +} + +// Export the winston logger with MCPLogger interface export { logger }; + +// Export default logger for convenience +export default logger; diff --git a/src/utils/stdio-transport.ts b/src/utils/stdio-transport.ts new file mode 100644 index 0000000..e873c71 --- /dev/null +++ b/src/utils/stdio-transport.ts @@ -0,0 +1,339 @@ +/** + * Stdio Transport Module + * + * This module implements communication via standard input/output streams + * using JSON-RPC 2.0 format for sending and receiving messages. + * + * @module stdio-transport + */ + +import { createInterface } from "readline"; +import { logger } from "./logger.js"; +import { z } from "zod"; + +// JSON-RPC 2.0 error codes +export enum JsonRpcErrorCode { + // Standard JSON-RPC 2.0 error codes + PARSE_ERROR = -32700, + INVALID_REQUEST = -32600, + METHOD_NOT_FOUND = -32601, + INVALID_PARAMS = -32602, + INTERNAL_ERROR = -32603, + // MCP specific error codes + TOOL_EXECUTION_ERROR = -32000, + VALIDATION_ERROR = -32001, +} + +// Type definitions for JSON-RPC 2.0 messages +export interface JsonRpcRequest { + jsonrpc: "2.0"; + id: string | number; + method: string; + params?: Record; +} + +export interface JsonRpcResponse { + jsonrpc: "2.0"; + id: string | number; + result?: unknown; + error?: JsonRpcError; +} + +export interface JsonRpcError { + code: number; + message: string; + data?: unknown; +} + +export interface JsonRpcNotification { + jsonrpc: "2.0"; + method: string; + params?: Record; +} + +// Setup readline interface for stdin +const rl = createInterface({ + input: process.stdin, + terminal: false +}); + +// Message handlers map +const messageHandlers: Map) => Promise; + paramsSchema?: z.ZodType; +}> = new Map(); + +/** + * Initialize stdio transport + * Sets up event listeners and message processing + */ +export function initStdioTransport(): void { + // Check for silent startup mode + const silentStartup = process.env.SILENT_STARTUP === 'true'; + + // Handle line events (incoming JSON) + rl.on('line', async (line) => { + try { + // Parse incoming JSON + const request = JSON.parse(line); + + // Validate it's a proper JSON-RPC 2.0 request + if (!request.jsonrpc || request.jsonrpc !== "2.0") { + sendErrorResponse({ + id: request.id || null, + code: JsonRpcErrorCode.INVALID_REQUEST, + message: "Invalid JSON-RPC 2.0 request: missing or invalid jsonrpc version" + }); + return; + } + + // Handle request with ID (requires response) + if (request.id !== undefined) { + await handleJsonRpcRequest(request as JsonRpcRequest).catch(err => { + if (!silentStartup) { + logger.error(`Error handling request: ${String(err)}`); + } + }); + } + // Handle notification (no response expected) + else if (request.method) { + void handleJsonRpcNotification(request as JsonRpcNotification); + } + // Invalid request format + else { + sendErrorResponse({ + id: null, + code: JsonRpcErrorCode.INVALID_REQUEST, + message: "Invalid JSON-RPC 2.0 message format" + }); + } + } catch (parseError) { + // Handle JSON parsing errors + if (!silentStartup) { + logger.error(`Failed to parse JSON input: ${String(parseError)}`); + } + sendErrorResponse({ + id: null, + code: JsonRpcErrorCode.PARSE_ERROR, + message: "Parse error: invalid JSON", + data: parseError instanceof Error ? parseError.message : String(parseError) + }); + } + }); + + // Handle stdin close + rl.on('close', () => { + if (!silentStartup) { + logger.info('Stdin closed, shutting down'); + } + process.exit(0); + }); + + // Log initialization only if not in silent mode + if (!silentStartup) { + logger.info("JSON-RPC 2.0 stdio transport initialized"); + } +} + +/** + * Handle a JSON-RPC request that requires a response + */ +async function handleJsonRpcRequest(request: JsonRpcRequest): Promise { + const { id, method, params = {} } = request; + + // Log to file but not console + logger.debug(`Received request: ${id} - ${method}`); + + // Look up handler + const handler = messageHandlers.get(method); + if (!handler) { + sendErrorResponse({ + id, + code: JsonRpcErrorCode.METHOD_NOT_FOUND, + message: `Method not found: ${method}` + }); + return; + } + + try { + // Validate parameters if schema exists + if (handler.paramsSchema) { + try { + const validationResult = handler.paramsSchema.parse(params); + // If validation changes values (e.g. default values), use the validated result + Object.assign(params, validationResult); + } catch (validationError) { + sendErrorResponse({ + id, + code: JsonRpcErrorCode.INVALID_PARAMS, + message: "Invalid parameters", + data: validationError instanceof Error ? validationError.message : String(validationError) + }); + return; + } + } + + // Execute handler + const result = await handler.execute(params); + + // Send successful response + sendResponse({ + id, + result + }); + } catch (error) { + // Handle execution errors + sendErrorResponse({ + id, + code: JsonRpcErrorCode.TOOL_EXECUTION_ERROR, + message: error instanceof Error ? error.message : String(error), + data: error + }); + } +} + +/** + * Handle a JSON-RPC notification (no response required) + */ +async function handleJsonRpcNotification(notification: JsonRpcNotification): Promise { + const { method, params = {} } = notification; + + // Log to file but not console + logger.debug(`Received notification: ${method}`); + + // Look up handler + const handler = messageHandlers.get(method); + if (!handler) { + // No response for notifications even if method not found + logger.warn(`Method not found for notification: ${method}`); + return; + } + + try { + // Validate parameters if schema exists + if (handler.paramsSchema) { + try { + handler.paramsSchema.parse(params); + } catch (validationError) { + logger.error(`Invalid parameters for notification ${method}: ${String(validationError)}`); + return; + } + } + + // Execute handler (fire and forget) + await handler.execute(params); + } catch (error) { + // Log execution errors but don't send response + logger.error(`Error handling notification ${method}: ${String(error)}`); + } +} + +/** + * Register a message handler for a specific method + * + * @param method - The method name to handle + * @param handler - The function to handle the method + * @param paramsSchema - Optional Zod schema for parameter validation + */ +export function registerHandler( + method: string, + handler: (params: Record) => Promise, + paramsSchema?: z.ZodType +): void { + messageHandlers.set(method, { + execute: handler, + paramsSchema + }); + logger.debug(`Registered handler for method: ${method}`); +} + +/** + * Send a successful response to stdout + * + * @param options - The response options + */ +export function sendResponse({ id, result }: { id: string | number; result?: unknown }): void { + const response: JsonRpcResponse = { + jsonrpc: "2.0", + id, + result + }; + + const jsonResponse = JSON.stringify(response); + process.stdout.write(jsonResponse + '\n'); + logger.debug(`Sent response: ${id}`); +} + +/** + * Send an error response to stdout + * + * @param error - The error details + */ +export function sendErrorResponse({ + id, + code, + message, + data +}: { + id: string | number | null; + code: number; + message: string; + data?: unknown; +}): void { + const response: JsonRpcResponse = { + jsonrpc: "2.0", + id: id ?? null, + error: { + code, + message, + data + } + }; + + const jsonResponse = JSON.stringify(response); + process.stdout.write(jsonResponse + '\n'); + logger.error(`Sent error response: ${id} - [${code}] ${message}`); +} + +/** + * Send a notification to the client (no response expected) + * + * @param method - The notification method name + * @param params - The notification parameters + */ +export function sendNotification(method: string, params?: Record): void { + const notification: JsonRpcNotification = { + jsonrpc: "2.0", + method, + params + }; + + const jsonNotification = JSON.stringify(notification); + process.stdout.write(jsonNotification + '\n'); + logger.debug(`Sent notification: ${method}`); +} + +/** + * Send a log message to the client + * + * @param level - The log level (info, warn, error, debug) + * @param message - The log message + * @param data - Optional additional data + */ +export function sendLogMessage(level: string, message: string, data?: unknown): void { + sendNotification("log", { + level, + message, + data, + timestamp: new Date().toISOString() + }); +} + +/** + * Enable debug mode for the transport + * Increases logging verbosity + */ +export function enableDebugMode(): void { + logger.level = "debug"; + logger.info("Debug mode enabled for stdio transport"); +} \ No newline at end of file diff --git a/stdio-start.sh b/stdio-start.sh new file mode 100755 index 0000000..199ee17 --- /dev/null +++ b/stdio-start.sh @@ -0,0 +1,97 @@ +#!/bin/bash + +# MCP Server Stdio Transport Launcher +# This script builds and runs the MCP server using stdin/stdout JSON-RPC 2.0 transport + +# ANSI colors for prettier output +RED='\033[0;31m' +GREEN='\033[0;32m' +YELLOW='\033[0;33m' +BLUE='\033[0;34m' +NC='\033[0m' # No Color + +# Show usage information +function show_usage { + echo -e "${BLUE}Usage:${NC} $0 [options]" + echo + echo "Options:" + echo " --debug Enable debug mode" + echo " --rebuild Force rebuild even if dist exists" + echo " --help Show this help message" + echo + echo "Examples:" + echo " $0 # Normal start" + echo " $0 --debug # Start with debug logging" + echo " $0 --rebuild # Force rebuild" + echo + echo "This script runs the MCP server with JSON-RPC 2.0 stdio transport." + echo "Logs will be written to the logs directory but not to stdout." + echo +} + +# Process command line arguments +REBUILD=false +DEBUG=false + +for arg in "$@"; do + case $arg in + --help) + show_usage + exit 0 + ;; + --debug) + DEBUG=true + shift + ;; + --rebuild) + REBUILD=true + shift + ;; + *) + echo -e "${RED}Unknown option:${NC} $arg" + show_usage + exit 1 + ;; + esac +done + +# Check for errors +if [ ! -f ".env" ]; then + echo -e "${RED}Error:${NC} .env file not found. Please create one from .env.example." >&2 + exit 1 +fi + +# Set environment variables +export USE_STDIO_TRANSPORT=true + +# Set debug mode if requested +if [ "$DEBUG" = true ]; then + export DEBUG=true + echo -e "${YELLOW}Debug mode enabled${NC}" >&2 +fi + +# Check if we need to build +if [ ! -d "dist" ] || [ "$REBUILD" = true ]; then + echo -e "${BLUE}Building MCP server with stdio transport...${NC}" >&2 + bun build ./src/index.ts --outdir ./dist --target bun || { + echo -e "${RED}Build failed!${NC}" >&2 + exit 1 + } +else + echo -e "${GREEN}Using existing build in dist/ directory${NC}" >&2 + echo -e "${YELLOW}Use --rebuild flag to force a rebuild${NC}" >&2 +fi + +# Create logs directory if it doesn't exist +mkdir -p logs + +# Run the application with stdio transport +echo -e "${GREEN}Starting MCP server with stdio transport...${NC}" >&2 +echo -e "${YELLOW}Note: All logs will be written to logs/ directory${NC}" >&2 +echo -e "${YELLOW}Press Ctrl+C to stop${NC}" >&2 + +# Execute the server +exec bun run dist/index.js + +# The exec replaces this shell with the server process +# so any code after this point will not be executed \ No newline at end of file diff --git a/test-jsonrpc.js b/test-jsonrpc.js new file mode 100755 index 0000000..74b6e0c --- /dev/null +++ b/test-jsonrpc.js @@ -0,0 +1,146 @@ +#!/usr/bin/env node + +/** + * JSON-RPC 2.0 Test Script for MCP Server + * + * This script tests the stdio transport communication with the MCP server + * by sending JSON-RPC 2.0 requests and processing responses. + * + * Usage: + * ./stdio-start.sh | node test-jsonrpc.js + * or + * node test-jsonrpc.js < sample-responses.json + */ + +const { spawn } = require('child_process'); +const readline = require('readline'); + +// Generate a random request ID +const generateId = () => Math.random().toString(36).substring(2, 15); + +// Counter for keeping track of requests/responses +let messageCount = 0; +let pendingRequests = new Map(); + +// Set up readline interface for stdin +const rl = readline.createInterface({ + input: process.stdin, + terminal: false +}); + +// Handle responses from the MCP server +rl.on('line', (line) => { + try { + const response = JSON.parse(line); + messageCount++; + + console.log(`\n[RECEIVED] Response #${messageCount}:`); + console.dir(response, { depth: null, colors: true }); + + // Check if this is a notification + if (!response.id && response.method) { + console.log(`šŸ‘‰ Received notification: ${response.method}`); + return; + } + + // Check if this is a response to a pending request + if (response.id && pendingRequests.has(response.id)) { + const requestTime = pendingRequests.get(response.id); + const responseTime = Date.now(); + console.log(`ā±ļø Response time: ${responseTime - requestTime}ms`); + pendingRequests.delete(response.id); + } + + // Check for error + if (response.error) { + console.log(`āŒ Error [${response.error.code}]: ${response.error.message}`); + } else if (response.result) { + console.log(`āœ… Success`); + } + } catch (error) { + console.error(`Error parsing response: ${error.message}`); + console.error(`Raw response: ${line}`); + } +}); + +// Define test requests +const testRequests = [ + // Test valid request + { + jsonrpc: "2.0", + id: generateId(), + method: "listDevicesTool", + params: { + entity_type: "light" + } + }, + + // Test method not found + { + jsonrpc: "2.0", + id: generateId(), + method: "nonexistentMethod", + params: {} + }, + + // Test invalid params + { + jsonrpc: "2.0", + id: generateId(), + method: "controlTool", + params: { + // Missing required parameters + } + }, + + // Test notification (no response expected) + { + jsonrpc: "2.0", + method: "ping", + params: { + timestamp: Date.now() + } + }, + + // Test malformed request (missing jsonrpc version) + { + id: generateId(), + method: "listDevicesTool", + params: {} + } +]; + +// Send requests with delay between each +let requestIndex = 0; + +function sendNextRequest() { + if (requestIndex >= testRequests.length) { + console.log('\nāœØ All test requests sent!'); + return; + } + + const request = testRequests[requestIndex++]; + console.log(`\n[SENDING] Request #${requestIndex}:`); + console.dir(request, { depth: null, colors: true }); + + // Store the request time for calculating response time + if (request.id) { + pendingRequests.set(request.id, Date.now()); + } + + // Send the request to the MCP server + process.stdout.write(JSON.stringify(request) + '\n'); + + // Schedule the next request + setTimeout(sendNextRequest, 1000); +} + +// Start sending test requests after a delay to allow server initialization +console.log('šŸš€ Starting JSON-RPC 2.0 test...'); +setTimeout(sendNextRequest, 2000); + +// Handle Ctrl+C +process.on('SIGINT', () => { + console.log('\nšŸ‘‹ Test script terminated'); + process.exit(0); +}); \ No newline at end of file diff --git a/tsconfig.stdio.json b/tsconfig.stdio.json new file mode 100644 index 0000000..9ce00d7 --- /dev/null +++ b/tsconfig.stdio.json @@ -0,0 +1,19 @@ +{ + "extends": "./tsconfig.json", + "compilerOptions": { + "outDir": "dist", + "rootDir": "src", + "sourceMap": true + }, + "include": [ + "src/stdio-server.ts", + "src/mcp/**/*.ts", + "src/utils/**/*.ts", + "src/tools/homeassistant/**/*.ts" + ], + "exclude": [ + "node_modules", + "dist", + "**/*.test.ts" + ] +} \ No newline at end of file diff --git a/webpack.config.cjs b/webpack.config.cjs new file mode 100644 index 0000000..5086592 --- /dev/null +++ b/webpack.config.cjs @@ -0,0 +1,48 @@ +const path = require('path'); +const TerserPlugin = require('terser-webpack-plugin'); + +module.exports = { + mode: 'production', + target: 'node', + entry: './src/utils/stdio-transport.ts', + output: { + path: path.resolve(__dirname, 'dist'), + filename: 'stdio-transport.js', + library: { + type: 'commonjs2' + } + }, + module: { + rules: [ + { + test: /\.tsx?$/, + use: 'ts-loader', + exclude: /node_modules/, + }, + ], + }, + resolve: { + extensions: ['.tsx', '.ts', '.js'], + extensionAlias: { + '.js': ['.js', '.ts'], + '.cjs': ['.cjs', '.cts'], + '.mjs': ['.mjs', '.mts'] + } + }, + optimization: { + minimize: true, + minimizer: [new TerserPlugin({ + terserOptions: { + format: { + comments: false, + }, + }, + extractComments: false, + })], + }, + externals: { + // Mark node modules as external to reduce bundle size + 'express': 'commonjs express', + 'winston': 'commonjs winston' + } +}; \ No newline at end of file