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defender's Introduction

defender

Godoc Reference Travis CI status

Defender is a low-level package to help prevent brute force attacks, built on top of golang.org/x/time/rate.

package main

import (
	"time"

	"github.com/tsileo/defender"
)

func main() {
	// Ban client for 1 hour if moe than 50 events per seconds are performed
	d := defender.New(50, 1 * time.Second, 1 * time.Hour)
	// Check if the client is already banned
	if client, ok := d.Client(r.RemoteAddr); ok && !client.Banned() {
		// Check auth
		authorized := authFunc(r)

		// Call `Inc` if the client failed
		if !authorized {
			if d.Inc(r.RemoteAddr) {
				// the client just got banned
			}
			// returns a bad status
		}
	}
}

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