23bcc0bb06
* Use [node-]redis as a direct dependency * Extract Redis client creation to its own module * Attach extensive logging in the Redis client creation module * Allow the rate limiter to pass requests when Redis is disconnected * Update rate-limit-redis * Default error input to empty object for formatRedisError method * Provide a name for the rate limiter's Redis client Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com> Co-authored-by: Rachael Sewell <rachmari@github.com>
31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
const rateLimit = require('express-rate-limit')
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const RedisStore = require('rate-limit-redis')
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const createRedisClient = require('../lib/redis/create-client')
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const isProduction = process.env.NODE_ENV === 'production'
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const { REDIS_URL } = process.env
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const rateLimitDatabaseNumber = 0
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const EXPIRES_IN_AS_SECONDS = 60
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module.exports = rateLimit({
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// 1 minute (or practically unlimited outside of production)
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windowMs: isProduction ? (EXPIRES_IN_AS_SECONDS * 1000) : 1, // Non-Redis configuration in `ms`. Used as a fallback when Redis is not working or active.
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// limit each IP to X requests per windowMs
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max: 250,
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// Don't rate limit requests for 200s and redirects
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// Or anything with a status code less than 400
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skipSuccessfulRequests: true,
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// When available, use Redis; if not, defaults to an in-memory store
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store: REDIS_URL && new RedisStore({
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client: createRedisClient({
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url: REDIS_URL,
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db: rateLimitDatabaseNumber,
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name: 'rate-limit'
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}),
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// 1 minute (or practically unlimited outside of production)
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expiry: isProduction ? EXPIRES_IN_AS_SECONDS : 1, // Redis configuration in `s`
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// If Redis is not connected, let the request succeed as failover
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passIfNotConnected: true
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})
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})
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