persistent-node-cache

import { PersistentNodeCache } from 'persistent-node-cache'; import { CacheSerializer } from 'persistent-node-cache'; // Create a cache (name required, period defaults to 1000ms) const cache = new PersistentNodeCache('mycache', 1000, process.env.CACHE_DIR || '', {}, undefined); // Set a value with optional TTL (in seconds) cache.set('greeting', 'Hello, World!', 3600); // Retrieve value const value = cache.get('greeting'); console.log(value); // 'Hello, World!' // Delete key cache.del('greeting'); // On next initialization, cache auto-restores (v1.2.0+) const cache2 = new PersistentNodeCache('mycache'); console.log(cache2.get('greeting')); // 'Hello, World!' if not deleted // Custom serializer example const base64Serializer: CacheSerializer = { serialize(item: any): Buffer { return Buffer.from(Buffer.from(JSON.stringify(item)).toString('base64') + '\n'); }, deserialize(bf: Buffer): any { return JSON.parse(Buffer.from(bf.toString().trim(), 'base64').toString()); } }; const cache3 = new PersistentNodeCache('secure', 1000, '', {}, base64Serializer); cache3.set('secret', 'sensitive data'); console.log(cache3.get('secret')); // 'sensitive data'