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50 lines
2.4 KiB
Plaintext
50 lines
2.4 KiB
Plaintext
---
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title: "@upstash/ratelimit"
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description: Ratelimiting library for serverless and edge runtimes. Built on top of Upstash Redis.
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date: "2022-06-06"
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url: https://upstash.com/blog/upstash-ratelimit
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repository: upstash/ratelimit
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published: true
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---
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In today's digital age, serverless computing has become increasingly popular due to its scalability and cost-efficiency. One of the challenges of serverless computing is to manage resources efficiently, and one critical aspect of this is rate limiting. Rate limiting is a technique that limits the number of requests a client can make to a server over a given period. This technique can prevent abuse, improve performance, and reduce costs. One npm package that helps implement rate limiting for serverless applications is @upstash/ratelimit, built on top of Upstash Redis.
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Upstash is a managed Redis-compatible database service designed for serverless applications.
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`@upstash/ratelimit` is an npm package that provides serverless rate limiting using Upstash Redis. The package offers a simple API that can be used to limit the number of requests a client can make within a given time frame. The following algorithms are supported:
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- Fixed window
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- Sliding window
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- Leaky bucket
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Using `@upstash/ratelimit` is straightforward. First, you need to install the package using npm:
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```bash
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npm install @upstash/ratelimit @upstash/redis
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```
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Then, you can use it in your application:
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```ts
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import { Ratelimit } from "@upstash/ratelimit"
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import { Redis } from "@upstash/redis"
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const ratelimit = new Ratelimit({
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redis: new Redis({
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url: "",
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token: ""
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}),
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limiter: Ratelimit.slidingWindow(10, "10s"),
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analytics: true
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})
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// Check if the client has exceeded the rate limit
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const { success } = await ratelimit.limit("identifier")
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```
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In the code above, we initialize Upstash with our Upstash Redis credentials and define our rate limiting rules. We then call the `limit` function, passing the identifier. The function returns a Promise that resolves with `success` and some other useful data.
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`@upstash/ratelimit` is a useful npm package for serverless rate limiting that simplifies the process of implementing rate limiting for serverless applications. The package is built on top of Upstash Redis, which provides a complete solution for serverless applications. With `@upstash/ratelimit`, serverless developers can easily implement rate limiting, which can help prevent abuse, improve performance, and reduce costs.
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