@mark01/express-utils/lib/middlewares/slow-down.js

npm package that contains utilities for express.js

import expressSlowDown from 'express-slow-down';
import { RedisStore } from 'rate-limit-redis';
export const slowDown = (redis, delayAfter) => {
    return expressSlowDown({
        store: new RedisStore({
            prefix: 'sd-common:',
            sendCommand: (...args) => redis.call(...args),
        }),
        delayAfter,
        windowMs: 15 * 60 * 1000,
        delayMs: (used, req) => {
            const delayAfter = req.slowDown.limit;
            return (used - delayAfter) * 200;
        },
    });
};
export default slowDown;