rolling-rate-limiter
@dutu/rate-limiter is an implementation of a rate limiter that supports rolling window and token bucket
Changelog
The module adheres to Semantic Versioning.
See github releases, where all notable changes are documented.
Installation
npm install --save "git+https://github.com/dutu/rate-limiter.git"
Rate-limiting Algorithms
Rolling Window
const limiter = new RollingWindowLimiter({ tokensPerInterval: 20, interval: 1000 * 10 })Fixed Window
const limiter = new FixedWindowLimiter({ tokensPerInterval: 20, interval: 1000 * 10 })The Reservoir Interval starts from the moment
dripTokens()is called for the first time.
Token bucket
const limiter = new TokenBucketLimiter({ bucketSize: 10, tokensPerInterval: 1, interval: 'second' })Quick examples
async function testToken() {
const limiter = new RollingWindowLimiter({ tokensPerInterval: 20, interval: 1000 * 10 })
debug(limiter.getTokens())
debug(limiter.tryRemoveTokens(10))
debug(limiter.tryRemoveTokens(32))
debug(limiter.getTokens())
await new Promise((resolve) => setTimeout(() => resolve(), 2000))
debug(limiter.tryRemoveTokens(10))
debug(limiter.getTokens())
debug(await limiter.awaitTokens(8))
debug(await limiter.awaitTokens(20))
}
testToken()
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