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reqlimit's Introduction

reqlimit

reqlimit is a tiny Golang middleware you can use to limit the frequency of requests to your server, on a per-IP basis.

Usage Example

package main

import (
	"fmt"
	"log"
	"net/http"
	"time"

	"github.com/avahowell/reqlimit"
)

func protectedHandler(w http.ResponseWriter, _ *http.Request) {
	fmt.Fprintf(w, "you have successfully requested a protected resource!")
}

func main() {
	handler := http.HandlerFunc(protectedHandler)
	limitedHandler := reqlimit.New(handler, 10, time.Second * 5) // limit the handler to 10 requests every 5 seconds. 

	log.Fatal(http.ListenAndServe(":8080", limitedHandler) )
}

Benchmarks

A limited handler is a bit slower and requires a bit more memory than a naked handler. Here's the benchmarks:

BenchmarkLimitedHandlerSingleIP-4    5000000       383 ns/op     120 B/op       3 allocs/op
BenchmarkLimitedHandlerManyIPs-4     2000000       532 ns/op     203 B/op       2 allocs/op
BenchmarkRawHandler-4              100000000      13.3 ns/op       0 B/op       0 allocs/op

reqlimit's People

Contributors

avahowell avatar lukechampine avatar esemplastic avatar

Stargazers

Xu Zhang avatar caohui avatar Anthony avatar  avatar Josh Quintana avatar  avatar Arif Datoo avatar  avatar tikeau avatar Ed Ganiukov avatar Paulo Pereira avatar Florian Schlachter avatar Joël Gähwiler avatar Jakob Gillich avatar Nicholas Wiersma avatar Josef Galea avatar Changsu Jiang avatar maddie avatar  avatar Matias Insaurralde avatar

Watchers

James Cloos avatar  avatar  avatar  avatar

reqlimit's Issues

X-Real-Ip and X-Forwarded-For can be spoofed

Hi friend,

PR #1 introduced support for X-Real-Ip and X-Forwarded-For. Both can be trivially spoofed, making this library not ideal for rate limiting adversaries. Maybe this intention of this library isn't adversarial situations, but I couldn't think of a non-adversarial reason to rate limit so I thought I'd bring it up.

Whadya think?

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