MCP Console Automation Server

import { spawn, ChildProcess } from 'child_process'; import { BaseProtocol } from '../core/BaseProtocol.js'; import { ConsoleSession, SessionOptions, ConsoleType, ConsoleOutput, } from '../types/index.js'; import { ProtocolCapabilities, SessionState, ErrorContext, ProtocolHealthStatus, ErrorRecoveryResult, ResourceUsage, } from '../core/IProtocol.js'; // Node.js Protocol connection options interface NodeConnectionOptions extends SessionOptions { nodePath?: string; nodeVersion?: string; scriptFile?: string; moduleEntry?: string; repl?: boolean; inspectMode?: boolean; inspectPort?: number; debugMode?: boolean; nodeFlags?: string[]; npmScript?: string; packageJsonPath?: string; environment?: Record<string, string>; enableCluster?: boolean; maxOldSpaceSize?: number; maxNewSpaceSize?: number; enableExperimentalFeatures?: boolean; esModules?: boolean; typescript?: boolean; tsNodePath?: string; } /** * Node.js Protocol Implementation * * Provides Node.js runtime console access through node command * Supports REPL, script execution, debugging, inspection, npm scripts, and TypeScript */ export class NodeProtocol extends BaseProtocol { public readonly type: ConsoleType = 'node'; public readonly capabilities: ProtocolCapabilities; private nodeProcesses = new Map<string, ChildProcess>(); // Compatibility property for old ProtocolFactory interface public get healthStatus(): ProtocolHealthStatus { return { isHealthy: this.isInitialized, lastChecked: new Date(), errors: [], warnings: [], metrics: { activeSessions: this.sessions.size, totalSessions: this.sessions.size, averageLatency: 0, successRate: 100, uptime: 0, }, dependencies: {}, }; } constructor() { super('node'); this.capabilities = { supportsStreaming: true, supportsFileTransfer: false, supportsX11Forwarding: false, supportsPortForwarding: false, supportsAuthentication: false, supportsEncryption: false, supportsCompression: false, supportsMultiplexing: false, supportsKeepAlive: true, supportsReconnection: true, supportsBinaryData: false, supportsCustomEnvironment: true, supportsWorkingDirectory: true, supportsSignals: true, supportsResizing: false, supportsPTY: true, maxConcurrentSessions: 15, defaultTimeout: 30000, supportedEncodings: ['utf-8'], supportedAuthMethods: [], platformSupport: { windows: true, linux: true, macos: true, freebsd: true, }, }; } async initialize(): Promise<void> { if (this.isInitialized) return; try { // Check if Node.js is available await this.checkNodeAvailability(); this.isInitialized = true; this.logger.info('Node.js protocol initialized with production features'); } catch (error: any) { this.logger.error('Failed to initialize Node.js protocol', error); throw error; } } async createSession(options: SessionOptions): Promise<ConsoleSession> { const sessionId = `node-${Date.now()}-${Math.random().toString(36).substring(2, 11)}`; return await this.createSessionWithTypeDetection(sessionId, options); } async executeCommand( sessionId: string, command: string, args?: string[] ): Promise<void> { const fullCommand = args && args.length > 0 ? `${command} ${args.join(' ')}` : command; await this.sendInput(sessionId, fullCommand + '\n'); } async sendInput(sessionId: string, input: string): Promise<void> { const nodeProcess = this.nodeProcesses.get(sessionId); const session = this.sessions.get(sessionId); if (!nodeProcess || !nodeProcess.stdin || !session) { throw new Error(`No active Node.js session: ${sessionId}`); } nodeProcess.stdin.write(input); session.lastActivity = new Date(); this.emit('input-sent', { sessionId, input, timestamp: new Date(), }); this.logger.debug( `Sent input to Node.js session ${sessionId}: ${input.substring(0, 100)}` ); } async getOutput(sessionId: string, since?: Date): Promise<any> { const outputs = await super.getOutput(sessionId, since); return outputs.map((output) => output.data).join(''); } async closeSession(sessionId: string): Promise<void> { try { const nodeProcess = this.nodeProcesses.get(sessionId); if (nodeProcess) { // Try graceful shutdown first nodeProcess.kill('SIGTERM'); // Force kill after timeout setTimeout(() => { if (nodeProcess && !nodeProcess.killed) { nodeProcess.kill('SIGKILL'); } }, 5000); this.nodeProcesses.delete(sessionId); } // Clean up base protocol session this.sessions.delete(sessionId); this.logger.info(`Node.js session ${sessionId} closed`); this.emit('session-closed', sessionId); } catch (error) { this.logger.error(`Error closing Node.js session ${sessionId}:`, error); throw error; } } async getHealthStatus(): Promise<ProtocolHealthStatus> { const baseStatus = await super.getHealthStatus(); try { await this.checkNodeAvailability(); return { ...baseStatus, dependencies: { node: { available: true }, }, }; } catch (error) { return { ...baseStatus, isHealthy: false, errors: [...baseStatus.errors, `Node.js not available: ${error}`], dependencies: { node: { available: false }, }, }; } } async dispose(): Promise<void> { await this.cleanup(); } async doCreateSession( sessionId: string, options: SessionOptions, sessionState: SessionState ): Promise<ConsoleSession> { if (!this.isInitialized) { await this.initialize(); } const nodeOptions = options as NodeConnectionOptions; // Build Node.js command const nodeCommand = this.buildNodeCommand(nodeOptions); // Spawn Node.js process const nodeProcess = spawn(nodeCommand[0], nodeCommand.slice(1), { stdio: ['pipe', 'pipe', 'pipe'], cwd: options.cwd || process.cwd(), env: { ...process.env, ...this.buildEnvironment(nodeOptions), ...options.env, }, }); // Set up output handling nodeProcess.stdout?.on('data', (data) => { const output: ConsoleOutput = { sessionId, type: 'stdout', data: data.toString(), timestamp: new Date(), }; this.addToOutputBuffer(sessionId, output); }); nodeProcess.stderr?.on('data', (data) => { const output: ConsoleOutput = { sessionId, type: 'stderr', data: data.toString(), timestamp: new Date(), }; this.addToOutputBuffer(sessionId, output); }); nodeProcess.on('error', (error) => { this.logger.error( `Node.js process error for session ${sessionId}:`, error ); this.emit('session-error', { sessionId, error }); }); nodeProcess.on('close', (code) => { this.logger.info( `Node.js process closed for session ${sessionId} with code ${code}` ); this.markSessionComplete(sessionId, code || 0); }); // Store the process this.nodeProcesses.set(sessionId, nodeProcess); // Create session object const session: ConsoleSession = { id: sessionId, command: nodeCommand[0], args: nodeCommand.slice(1), cwd: options.cwd || process.cwd(), env: { ...process.env, ...this.buildEnvironment(nodeOptions), ...options.env, }, createdAt: new Date(), lastActivity: new Date(), status: 'running', type: this.type, streaming: options.streaming, executionState: 'idle', activeCommands: new Map(), pid: nodeProcess.pid, }; this.sessions.set(sessionId, session); this.logger.info( `Node.js session ${sessionId} created for ${nodeOptions.scriptFile || nodeOptions.moduleEntry || nodeOptions.repl ? 'REPL' : 'Node.js application'}` ); this.emit('session-created', { sessionId, type: 'node', session }); return session; } // Missing IProtocol methods for compatibility getAllSessions(): ConsoleSession[] { return Array.from(this.sessions.values()); } getActiveSessions(): ConsoleSession[] { return Array.from(this.sessions.values()).filter( (session) => session.status === 'running' ); } getSessionCount(): number { return this.sessions.size; } async getSessionState(sessionId: string): Promise<SessionState> { const session = this.sessions.get(sessionId); if (!session) { throw new Error(`Session ${sessionId} not found`); } return { sessionId, status: session.status, isOneShot: false, // Node.js sessions are typically persistent isPersistent: true, createdAt: session.createdAt, lastActivity: session.lastActivity, pid: session.pid, metadata: {}, }; } async handleError( error: Error, context: ErrorContext ): Promise<ErrorRecoveryResult> { this.logger.error( `Error in Node.js session ${context.sessionId}: ${error.message}` ); return { recovered: false, strategy: 'none', attempts: 0, duration: 0, error: error.message, }; } async recoverSession(sessionId: string): Promise<boolean> { const nodeProcess = this.nodeProcesses.get(sessionId); return (nodeProcess && !nodeProcess.killed) || false; } getResourceUsage(): ResourceUsage { const memUsage = process.memoryUsage(); const cpuUsage = process.cpuUsage(); return { memory: { used: memUsage.heapUsed, available: memUsage.heapTotal, peak: memUsage.heapTotal, }, cpu: { usage: cpuUsage.user + cpuUsage.system, load: [0, 0, 0], }, network: { bytesIn: 0, bytesOut: 0, connectionsActive: this.nodeProcesses.size, }, storage: { bytesRead: 0, bytesWritten: 0, }, sessions: { active: this.sessions.size, total: this.sessions.size, peak: this.sessions.size, }, }; } private async checkNodeAvailability(): Promise<void> { return new Promise((resolve, reject) => { const testProcess = spawn('node', ['--version'], { stdio: 'pipe' }); testProcess.on('close', (code) => { if (code === 0) { resolve(); } else { reject( new Error('Node.js runtime not found. Please install Node.js.') ); } }); testProcess.on('error', () => { reject(new Error('Node.js runtime not found. Please install Node.js.')); }); }); } private buildNodeCommand(options: NodeConnectionOptions): string[] { const command = []; // Node.js executable if (options.nodePath) { command.push(options.nodePath); } else if (options.nodeVersion) { command.push(`node${options.nodeVersion}`); } else { command.push('node'); } // Node.js flags if (options.nodeFlags) { command.push(...options.nodeFlags); } // Memory options if (options.maxOldSpaceSize) { command.push(`--max-old-space-size=${options.maxOldSpaceSize}`); } if (options.maxNewSpaceSize) { command.push(`--max-new-space-size=${options.maxNewSpaceSize}`); } // Inspection mode if (options.inspectMode && options.inspectPort) { command.push(`--inspect=${options.inspectPort}`); } // Debug mode if (options.debugMode) { command.push('--inspect-brk'); } // Experimental features if (options.enableExperimentalFeatures) { command.push('--experimental-modules'); } // ES Modules if (options.esModules) { command.push('--input-type=module'); } // TypeScript support if (options.typescript && options.tsNodePath) { command.push('-r', options.tsNodePath); } // REPL mode if (options.repl) { command.push('-i'); } // Module entry point if (options.moduleEntry) { command.push('-e', options.moduleEntry); } else if (options.scriptFile) { command.push(options.scriptFile); } else if (options.npmScript && options.packageJsonPath) { command.unshift('npm', 'run', options.npmScript); return command; } else if (!options.repl) { // Default to REPL if no script specified command.push('-i'); } // Application arguments if (options.args) { command.push(...options.args); } return command; } private buildEnvironment( options: NodeConnectionOptions ): Record<string, string> { const env: Record<string, string> = {}; // Custom environment variables if (options.environment) { Object.assign(env, options.environment); } // Node.js specific environment if (options.nodeVersion) { env.NODE_VERSION = options.nodeVersion; } // Cluster mode if (options.enableCluster) { env.NODE_ENV = 'cluster'; } return env; } async cleanup(): Promise<void> { this.logger.info('Cleaning up Node.js protocol'); // Close all Node.js processes for (const [sessionId, process] of Array.from(this.nodeProcesses)) { try { process.kill(); } catch (error) { this.logger.error( `Error killing Node.js process for session ${sessionId}:`, error ); } } // Clear all data this.nodeProcesses.clear(); // Call parent cleanup await super.cleanup(); } } export default NodeProtocol;