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handler.go
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/
handler.go
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package bsmratelimit_fasthttp
import (
"github.com/bsm/ratelimit"
"github.com/valyala/fasthttp"
)
// LimitHandler is a very simple FastHTTP adapter for `github.com/bsm/ratelimit`. It wraps original request handler with a rate-limited one
func LimitHandler(handler fasthttp.RequestHandler, limiter *ratelimit.RateLimiter, onLimitReachedHandler fasthttp.RequestHandler) fasthttp.RequestHandler {
return func(ctx *fasthttp.RequestCtx) {
shouldLimit := limiter.Limit()
if shouldLimit {
onLimitReachedHandler(ctx)
return
}
handler(ctx)
}
}
// SimpleLimitHandler covers the most simple rate limiting case when the server only needs to return a predefined status code.
func SimpleLimitHandler(handler fasthttp.RequestHandler, limiter *ratelimit.RateLimiter, statusCode int) fasthttp.RequestHandler {
return LimitHandler(handler, limiter, func(ctx *fasthttp.RequestCtx) {
ctx.SetStatusCode(statusCode)
ctx.SetBody([]byte("You have reached maximum request limit."))
})
}