nuxt/dist/core/runtime/nitro/cache-driver.js

Nuxt is a free and open-source framework with an intuitive and extendable way to create type-safe, performant and production-grade full-stack web applications and websites with Vue.js.

import { defineDriver } from "unstorage";
import fsDriver from "unstorage/drivers/fs-lite";
import lruCache from "unstorage/drivers/lru-cache";
const normalizeFsKey = (item) => item.replaceAll(":", "_");
export default defineDriver((opts) => {
  const fs = fsDriver({ base: opts.base });
  const lru = lruCache({ max: 1e3 });
  return {
    ...fs,
    // fall back to file system - only the bottom three methods are used in renderer
    async setItem(key, value, opts2) {
      await Promise.all([
        fs.setItem(normalizeFsKey(key), value, opts2),
        lru.setItem(key, value, opts2)
      ]);
    },
    async hasItem(key, opts2) {
      return await lru.hasItem(key, opts2) || await fs.hasItem(normalizeFsKey(key), opts2);
    },
    async getItem(key, opts2) {
      return await lru.getItem(key, opts2) || await fs.getItem(normalizeFsKey(key), opts2);
    }
  };
});