lru-send/dist/index.js

LRU-based caching middleware for Node.js

import LRU from 'quick-lru';

const lruSend = (lruInstance) => {
    const cache = lruInstance || new LRU({ maxSize: 1000, maxAge: 1000 * 60 });
    return (req, res, next) => {
        if (req.method === 'GET') {
            const key = `${req.url}.${req.headers['accepts']}.${req.headers['accept-encoding']}`;
            const value = cache.get(key);
            if (value) {
                res.send(value);
                return;
            }
            const _send = res.send;
            res.send = (body) => {
                cache.set(key, body);
                return _send(body);
            };
        }
        next();
    };
};

export { lruSend };