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257
source/mcp-server.ts
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257
source/mcp-server.ts
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import * as http from 'http';
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import * as url from 'url';
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import { v4 as uuidv4 } from 'uuid';
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import { MCPServerSettings, ServerStatus, MCPClient, ToolDefinition } from './types';
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import { SceneTools } from './tools/scene-tools';
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import { NodeTools } from './tools/node-tools';
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import { ComponentTools } from './tools/component-tools';
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import { PrefabTools } from './tools/prefab-tools';
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import { ProjectTools } from './tools/project-tools';
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import { DebugTools } from './tools/debug-tools';
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import { PreferencesTools } from './tools/preferences-tools';
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import { ServerTools } from './tools/server-tools';
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import { BroadcastTools } from './tools/broadcast-tools';
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export class MCPServer {
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private settings: MCPServerSettings;
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private httpServer: http.Server | null = null;
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private clients: Map<string, MCPClient> = new Map();
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private tools: Record<string, any> = {};
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private toolsList: ToolDefinition[] = [];
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constructor(settings: MCPServerSettings) {
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this.settings = settings;
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this.initializeTools();
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}
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private initializeTools(): void {
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try {
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console.log('[MCPServer] Initializing tools...');
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this.tools.scene = new SceneTools();
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this.tools.node = new NodeTools();
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this.tools.component = new ComponentTools();
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this.tools.prefab = new PrefabTools();
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this.tools.project = new ProjectTools();
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this.tools.debug = new DebugTools();
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this.tools.preferences = new PreferencesTools();
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this.tools.server = new ServerTools();
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this.tools.broadcast = new BroadcastTools();
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console.log('[MCPServer] Tools initialized successfully');
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} catch (error) {
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console.error('[MCPServer] Error initializing tools:', error);
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throw error;
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}
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}
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public async start(): Promise<void> {
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if (this.httpServer) {
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console.log('[MCPServer] Server is already running');
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return;
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}
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try {
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console.log(`[MCPServer] Starting HTTP server on port ${this.settings.port}...`);
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this.httpServer = http.createServer(this.handleHttpRequest.bind(this));
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await new Promise<void>((resolve, reject) => {
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this.httpServer!.listen(this.settings.port, '127.0.0.1', () => {
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console.log(`[MCPServer] ✅ HTTP server started successfully on http://127.0.0.1:${this.settings.port}`);
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console.log(`[MCPServer] Health check: http://127.0.0.1:${this.settings.port}/health`);
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console.log(`[MCPServer] MCP endpoint: http://127.0.0.1:${this.settings.port}/mcp`);
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resolve();
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});
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this.httpServer!.on('error', (err: any) => {
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console.error('[MCPServer] ❌ Failed to start server:', err);
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if (err.code === 'EADDRINUSE') {
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console.error(`[MCPServer] Port ${this.settings.port} is already in use. Please change the port in settings.`);
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}
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reject(err);
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});
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});
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this.setupTools();
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console.log('[MCPServer] 🚀 MCP Server is ready for connections');
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} catch (error) {
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console.error('[MCPServer] ❌ Failed to start server:', error);
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throw error;
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}
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}
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private setupTools(): void {
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this.toolsList = [];
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for (const [category, toolSet] of Object.entries(this.tools)) {
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const tools = toolSet.getTools();
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for (const tool of tools) {
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this.toolsList.push({
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name: `${category}_${tool.name}`,
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description: tool.description,
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inputSchema: tool.inputSchema
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});
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}
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}
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}
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public async executeToolCall(toolName: string, args: any): Promise<any> {
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const parts = toolName.split('_');
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const category = parts[0];
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const toolMethodName = parts.slice(1).join('_');
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if (this.tools[category]) {
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return await this.tools[category].execute(toolMethodName, args);
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}
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throw new Error(`Tool ${toolName} not found`);
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}
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public getClients(): MCPClient[] {
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return Array.from(this.clients.values());
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}
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public getAvailableTools(): ToolDefinition[] {
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return this.toolsList;
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}
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public getSettings(): MCPServerSettings {
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return this.settings;
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}
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private async handleHttpRequest(req: http.IncomingMessage, res: http.ServerResponse): Promise<void> {
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const parsedUrl = url.parse(req.url || '', true);
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const pathname = parsedUrl.pathname;
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// Set CORS headers
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res.setHeader('Access-Control-Allow-Origin', '*');
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res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
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res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
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res.setHeader('Content-Type', 'application/json');
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if (req.method === 'OPTIONS') {
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res.writeHead(200);
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res.end();
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return;
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}
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try {
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if (pathname === '/mcp' && req.method === 'POST') {
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await this.handleMCPRequest(req, res);
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} else if (pathname === '/health' && req.method === 'GET') {
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res.writeHead(200);
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res.end(JSON.stringify({ status: 'ok', tools: this.toolsList.length }));
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} else {
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res.writeHead(404);
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res.end(JSON.stringify({ error: 'Not found' }));
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}
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} catch (error) {
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console.error('HTTP request error:', error);
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res.writeHead(500);
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res.end(JSON.stringify({ error: 'Internal server error' }));
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}
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}
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private async handleMCPRequest(req: http.IncomingMessage, res: http.ServerResponse): Promise<void> {
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let body = '';
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req.on('data', (chunk) => {
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body += chunk.toString();
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});
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req.on('end', async () => {
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try {
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const message = JSON.parse(body);
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const response = await this.handleMessage(message);
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res.writeHead(200);
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res.end(JSON.stringify(response));
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} catch (error) {
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console.error('Error handling MCP request:', error);
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res.writeHead(400);
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res.end(JSON.stringify({
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jsonrpc: '2.0',
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id: null,
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error: {
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code: -32700,
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message: 'Parse error'
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}
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}));
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}
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});
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}
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private async handleMessage(message: any): Promise<any> {
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const { id, method, params } = message;
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try {
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let result: any;
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switch (method) {
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case 'tools/list':
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result = { tools: this.getAvailableTools() };
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break;
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case 'tools/call':
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const { name, arguments: args } = params;
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const toolResult = await this.executeToolCall(name, args);
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result = { content: [{ type: 'text', text: JSON.stringify(toolResult) }] };
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break;
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case 'initialize':
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// MCP initialization
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result = {
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protocolVersion: '2024-11-05',
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capabilities: {
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tools: {}
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},
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serverInfo: {
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name: 'cocos-mcp-server',
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version: '1.0.0'
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}
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};
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break;
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default:
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throw new Error(`Unknown method: ${method}`);
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}
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return {
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jsonrpc: '2.0',
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id,
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result
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};
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} catch (error: any) {
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return {
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jsonrpc: '2.0',
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id,
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error: {
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code: -32603,
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message: error.message
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}
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};
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}
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}
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public stop(): void {
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if (this.httpServer) {
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this.httpServer.close();
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this.httpServer = null;
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console.log('[MCPServer] HTTP server stopped');
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}
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this.clients.clear();
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}
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public getStatus(): ServerStatus {
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return {
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running: !!this.httpServer,
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port: this.settings.port,
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clients: 0 // HTTP is stateless, no persistent clients
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};
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}
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public updateSettings(settings: MCPServerSettings) {
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this.settings = settings;
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if (this.httpServer) {
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this.stop();
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this.start();
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}
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}
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}
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// HTTP transport doesn't need persistent connections
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// MCP over HTTP uses request-response pattern
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