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'; // Python Protocol connection options interface PythonConnectionOptions extends SessionOptions { pythonPath?: string; virtualEnv?: string; pythonVersion?: string; scriptFile?: string; module?: string; interactive?: boolean; buffered?: boolean; optimized?: boolean; pythonFlags?: string[]; environment?: Record<string, string>; pipRequirements?: string[]; condaEnv?: string; enableDebug?: boolean; debugPort?: number; enableProfiling?: boolean; } /** * Python Protocol Implementation * * Provides Python interpreter console access through python command * Supports virtual environments, modules, scripts, debugging, and interactive sessions */ export class PythonProtocol extends BaseProtocol { public readonly type: ConsoleType = 'python'; public readonly capabilities: ProtocolCapabilities; private pythonProcesses = 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('python'); 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: 20, 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 Python is available await this.checkPythonAvailability(); this.isInitialized = true; this.logger.info('Python protocol initialized with production features'); } catch (error: any) { this.logger.error('Failed to initialize Python protocol', error); throw error; } } async createSession(options: SessionOptions): Promise<ConsoleSession> { const sessionId = `python-${Date.now()}-${Math.random().toString(36).substring(2, 11)}`; return await this.createSessionWithTypeDetection(sessionId, options); } async dispose(): Promise<void> { await this.cleanup(); } 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 pythonProcess = this.pythonProcesses.get(sessionId); const session = this.sessions.get(sessionId); if (!pythonProcess || !pythonProcess.stdin || !session) { throw new Error(`No active Python session: ${sessionId}`); } pythonProcess.stdin.write(input); session.lastActivity = new Date(); this.emit('input-sent', { sessionId, input, timestamp: new Date(), }); this.logger.debug( `Sent input to Python session ${sessionId}: ${input.substring(0, 100)}` ); } async closeSession(sessionId: string): Promise<void> { try { const pythonProcess = this.pythonProcesses.get(sessionId); if (pythonProcess) { // Try graceful shutdown first pythonProcess.kill('SIGTERM'); // Force kill after timeout setTimeout(() => { if (pythonProcess && !pythonProcess.killed) { pythonProcess.kill('SIGKILL'); } }, 5000); this.pythonProcesses.delete(sessionId); } // Clean up base protocol session this.sessions.delete(sessionId); this.logger.info(`Python session ${sessionId} closed`); this.emit('session-closed', sessionId); } catch (error) { this.logger.error(`Error closing Python session ${sessionId}:`, error); throw error; } } async doCreateSession( sessionId: string, options: SessionOptions, sessionState: SessionState ): Promise<ConsoleSession> { if (!this.isInitialized) { await this.initialize(); } const pythonOptions = options as PythonConnectionOptions; // Build Python command const pythonCommand = this.buildPythonCommand(pythonOptions); // Spawn Python process const pythonProcess = spawn(pythonCommand[0], pythonCommand.slice(1), { stdio: ['pipe', 'pipe', 'pipe'], cwd: options.cwd || process.cwd(), env: { ...process.env, ...this.buildEnvironment(pythonOptions), ...options.env, }, }); // Set up output handling pythonProcess.stdout?.on('data', (data) => { const output: ConsoleOutput = { sessionId, type: 'stdout', data: data.toString(), timestamp: new Date(), }; this.addToOutputBuffer(sessionId, output); }); pythonProcess.stderr?.on('data', (data) => { const output: ConsoleOutput = { sessionId, type: 'stderr', data: data.toString(), timestamp: new Date(), }; this.addToOutputBuffer(sessionId, output); }); pythonProcess.on('error', (error) => { this.logger.error( `Python process error for session ${sessionId}:`, error ); this.emit('session-error', { sessionId, error }); }); pythonProcess.on('close', (code) => { this.logger.info( `Python process closed for session ${sessionId} with code ${code}` ); this.markSessionComplete(sessionId, code || 0); }); // Store the process this.pythonProcesses.set(sessionId, pythonProcess); // Create session object const session: ConsoleSession = { id: sessionId, command: pythonCommand[0], args: pythonCommand.slice(1), cwd: options.cwd || process.cwd(), env: { ...process.env, ...this.buildEnvironment(pythonOptions), ...options.env, }, createdAt: new Date(), lastActivity: new Date(), status: 'running', type: this.type, streaming: options.streaming, executionState: 'idle', activeCommands: new Map(), pid: pythonProcess.pid, }; this.sessions.set(sessionId, session); this.logger.info( `Python session ${sessionId} created for ${pythonOptions.scriptFile || pythonOptions.module || 'interactive Python'}` ); this.emit('session-created', { sessionId, type: 'python', session }); return session; } // Override getOutput to satisfy old ProtocolFactory interface (returns string) async getOutput(sessionId: string, since?: Date): Promise<any> { const outputs = await super.getOutput(sessionId, since); return outputs.map((output) => output.data).join(''); } // 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, // Python 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 Python session ${context.sessionId}: ${error.message}` ); return { recovered: false, strategy: 'none', attempts: 0, duration: 0, error: error.message, }; } async recoverSession(sessionId: string): Promise<boolean> { const pythonProcess = this.pythonProcesses.get(sessionId); return (pythonProcess && !pythonProcess.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.pythonProcesses.size, }, storage: { bytesRead: 0, bytesWritten: 0, }, sessions: { active: this.sessions.size, total: this.sessions.size, peak: this.sessions.size, }, }; } async getHealthStatus(): Promise<ProtocolHealthStatus> { const baseStatus = await super.getHealthStatus(); try { await this.checkPythonAvailability(); return { ...baseStatus, dependencies: { python: { available: true }, }, }; } catch (error) { return { ...baseStatus, isHealthy: false, errors: [...baseStatus.errors, `Python not available: ${error}`], dependencies: { python: { available: false }, }, }; } } private async checkPythonAvailability(): Promise<void> { return new Promise((resolve, reject) => { const testProcess = spawn('python', ['--version'], { stdio: 'pipe' }); testProcess.on('close', (code) => { if (code === 0) { resolve(); } else { reject( new Error('Python interpreter not found. Please install Python.') ); } }); testProcess.on('error', () => { reject( new Error('Python interpreter not found. Please install Python.') ); }); }); } private buildPythonCommand(options: PythonConnectionOptions): string[] { const command = []; // Python executable if (options.pythonPath) { command.push(options.pythonPath); } else if (options.pythonVersion) { command.push(`python${options.pythonVersion}`); } else { command.push('python'); } // Python flags if (options.pythonFlags) { command.push(...options.pythonFlags); } // Optimization flags if (options.optimized) { command.push('-O'); } // Buffering if (options.buffered === false) { command.push('-u'); } // Debug options if (options.enableDebug && options.debugPort) { command.push('-m', 'pdb'); } // Interactive mode if (options.interactive) { command.push('-i'); } // Module or script execution if (options.module) { command.push('-m', options.module); } else if (options.scriptFile) { command.push(options.scriptFile); } else if (!options.interactive) { // Default to interactive if no script or module specified command.push('-i'); } // Application arguments if (options.args) { command.push(...options.args); } return command; } private buildEnvironment( options: PythonConnectionOptions ): Record<string, string> { const env: Record<string, string> = {}; // Virtual environment activation if (options.virtualEnv) { env.VIRTUAL_ENV = options.virtualEnv; env.PATH = `${options.virtualEnv}/bin:${process.env.PATH}`; } // Conda environment if (options.condaEnv) { env.CONDA_DEFAULT_ENV = options.condaEnv; } // Custom environment variables if (options.environment) { Object.assign(env, options.environment); } // Python path modifications if (options.pythonPath) { env.PYTHONPATH = options.pythonPath; } // Profiling if (options.enableProfiling) { env.PYTHONPROFILEOUTPUT = 'profile.out'; } return env; } async cleanup(): Promise<void> { this.logger.info('Cleaning up Python protocol'); // Close all Python processes for (const [sessionId, process] of Array.from(this.pythonProcesses)) { try { process.kill(); } catch (error) { this.logger.error( `Error killing Python process for session ${sessionId}:`, error ); } } // Clear all data this.pythonProcesses.clear(); // Call parent cleanup await super.cleanup(); } } export default PythonProtocol;