bentocache/build/src/drivers/file/cleaner_worker.js

Multi-tier cache module for Node.js. Redis, Upstash, CloudfareKV, File, in-memory and others drivers

// src/drivers/file/cleaner_worker.js
import { join } from "path";
import { readdir, unlink, readFile } from "fs/promises";
import { parentPort, workerData } from "worker_threads";
var directory = workerData.directory;
var pruneIntervalInMs = workerData.pruneInterval;
async function deleteFileIfExpired(filePath) {
  const content = await readFile(filePath, "utf-8");
  const [, expiresAt] = JSON.parse(content);
  const expiry = new Date(expiresAt).getTime();
  if (+expiry === -1) return;
  if (expiry < Date.now()) {
    await unlink(filePath);
  }
}
async function prune() {
  const dirEntries = await readdir(directory, { recursive: true, withFileTypes: true });
  for (const dirEntry of dirEntries) {
    if (dirEntry.isDirectory()) continue;
    const filePath = join(dirEntry.path, dirEntry.name);
    await deleteFileIfExpired(filePath).catch((error) => {
      parentPort?.postMessage({ type: "error", error });
    });
  }
}
setInterval(async () => {
  try {
    await prune();
    parentPort?.postMessage({ type: "info", message: "cache cleaned up" });
  } catch (error) {
    parentPort?.postMessage({ type: "error", error });
  }
}, pruneIntervalInMs);
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