YouTube Transcript DL MCP Server

import { ServerConfig, TransportConfig } from '../types/index.js'; export const defaultServerConfig: ServerConfig = { port: parseInt(process.env.PORT || '3000', 10), host: process.env.HOST || '0.0.0.0', cors: { enabled: process.env.CORS_ENABLED !== 'false', origins: process.env.CORS_ORIGINS?.split(',') || ['*'] }, rateLimit: { windowMs: parseInt(process.env.RATE_LIMIT_WINDOW || '900000', 10), // 15 minutes max: parseInt(process.env.RATE_LIMIT_MAX || '100', 10) }, cache: { enabled: process.env.CACHE_ENABLED !== 'false', ttl: parseInt(process.env.CACHE_TTL || '3600', 10), // 1 hour maxSize: parseInt(process.env.CACHE_MAX_SIZE || '1000', 10) }, logging: { level: (process.env.LOG_LEVEL as any) || 'info', format: (process.env.LOG_FORMAT as any) || 'simple' } }; export const defaultTransportConfig: TransportConfig = { stdio: { enabled: process.env.STDIO_ENABLED !== 'false' }, sse: { enabled: process.env.SSE_ENABLED !== 'false', endpoint: process.env.SSE_ENDPOINT || '/events' }, http: { enabled: process.env.HTTP_ENABLED !== 'false', endpoint: process.env.HTTP_ENDPOINT || '/api' } }; export function validateConfig(config: ServerConfig): void { if (config.port < 1 || config.port > 65535) { throw new Error('Port must be between 1 and 65535'); } if (config.rateLimit.windowMs < 1000) { throw new Error('Rate limit window must be at least 1 second'); } if (config.rateLimit.max < 1) { throw new Error('Rate limit max must be at least 1'); } if (config.cache.ttl < 1) { throw new Error('Cache TTL must be at least 1 second'); } if (config.cache.maxSize < 1) { throw new Error('Cache max size must be at least 1'); } if (!['debug', 'info', 'warn', 'error'].includes(config.logging.level)) { throw new Error('Log level must be one of: debug, info, warn, error'); } if (!['json', 'simple'].includes(config.logging.format)) { throw new Error('Log format must be one of: json, simple'); } } export function mergeConfig( defaultConfig: ServerConfig, userConfig: Partial<ServerConfig> ): ServerConfig { return { ...defaultConfig, ...userConfig, cors: { ...defaultConfig.cors, ...userConfig.cors }, rateLimit: { ...defaultConfig.rateLimit, ...userConfig.rateLimit }, cache: { ...defaultConfig.cache, ...userConfig.cache }, logging: { ...defaultConfig.logging, ...userConfig.logging } }; }