lru-send/dist/redis.js

LRU-based caching middleware for Node.js

import * as Redis from 'ioredis';

const lruSend = (redisInstance) => {
    const cache = redisInstance || new Redis();
    return async (req, res, next) => {
        const key = `${req.url}.${req.headers['accepts']}.${req.headers['accept-encoding']}`;
        const value = await cache.get(key);
        if (value) {
            res.send(value);
            return;
        }
        const _send = res.send;
        res.send = (body) => {
            cache.set(key, body).then((r) => {
                if (r === 'OK') {
                    return _send(body);
                }
            });
            return res;
        };
        next();
    };
};

export { lruSend };