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Effect Community2y ago
19 replies
Perry

How to implement http middleware using RateLimiter effect?

first of all, effect provides very efficient RateLimiter, and I'd like to use it to implement rate limit middleware.

As a ratelimit key, we can use some specific request header value, (e.g. req.headers['x-api-key']).. There are some problems with this implementation that

- ratelimiter for specific api key should not be reset for every request
- we should be able to get the remaining ratelimit amounts to expose in the response header, but I don't see a way to get the "remaining limits" in the current RateLimiter implementation.

Can you help with this? Any example code or high-level guidance would be much appreciated
GitHub
An ecosystem of tools to build robust applications in TypeScript. - Effect-TS/effect
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