Master MCP Server

import http from 'node:http' export interface RouteHandler { (req: http.IncomingMessage, body: string | undefined): { status?: number; headers?: Record<string, string>; body?: any } } export interface TestServer { url: string port: number close: () => Promise<void> register: (method: string, path: string, handler: RouteHandler) => void } export function createTestServer(): Promise<TestServer> { const routes = new Map<string, RouteHandler>() const server = http.createServer(async (req, res) => { try { const url = new URL(req.url || '/', 'http://localhost') const key = `${(req.method || 'GET').toUpperCase()} ${url.pathname}` let body: string | undefined if (req.method && ['POST', 'PUT', 'PATCH'].includes(req.method.toUpperCase())) { body = await new Promise<string>((resolve) => { const chunks: Buffer[] = [] req.on('data', (c) => chunks.push(Buffer.isBuffer(c) ? c : Buffer.from(String(c)))) req.on('end', () => resolve(Buffer.concat(chunks).toString('utf8'))) }) } const handler = routes.get(key) if (!handler) { res.statusCode = 404 res.end('not found') return } const result = handler(req, body) const status = result.status ?? 200 const headers = { 'content-type': 'application/json', ...(result.headers ?? {}) } const payload = typeof result.body === 'string' ? result.body : JSON.stringify(result.body ?? { ok: true }) res.writeHead(status, headers) res.end(payload) } catch (err: any) { res.writeHead(500, { 'content-type': 'application/json' }) res.end(JSON.stringify({ error: err?.message ?? 'internal error' })) } }) return new Promise((resolve) => { server.listen(0, '127.0.0.1', () => { const addr = server.address() const port = typeof addr === 'object' && addr ? addr.port : 0 resolve({ port, url: `http://127.0.0.1:${port}`, close: () => new Promise<void>((r) => server.close(() => r())), register: (method: string, path: string, handler: RouteHandler) => { routes.set(`${method.toUpperCase()} ${path}`, handler) }, }) }) }) }