countty/lib/configs/cache.js

✚ Easily persist your own autonomous Page View Counter for free (no VPS or database plans required).

import { createLRU } from 'lru.min';
import { getRateLimitKey } from './rate-limit.js';
export const cache = {
    rateLimit: createLRU({ max: 1000 }),
    route: createLRU({ max: 1000 }),
};
const getRouteCacheKey = async (request) => {
    const ip = await getRateLimitKey(request);
    const url = new URL(request.url);
    const searchParams = new URLSearchParams(url.search);
    return `${ip}${url.pathname}?${String(searchParams)}`;
};
export const getRouteCache = async (request, ttl = 1000) => {
    const now = Date.now();
    const key = await getRouteCacheKey(request);
    const cached = cache.route.get(key);
    if (!cached || now - cached.timestamp >= ttl)
        return { hit: false };
    return { hit: true, data: cached.data };
};
export const setRouteCache = async (request, data) => {
    const key = await getRouteCacheKey(request);
    cache.route.set(key, {
        data,
        timestamp: Date.now(),
    });
};