/dcard-middleware

simple ratelimiter in golang (using Redis)

Primary LanguageGo

Usage

  1. Run Redis Server (port: 6379)

  2. Run main.go Configuration

    • useMem(Bool): set if you dont use Redis
    • ipLimit(Int): rate limit for certain IP
    • duration(time.Duration): time for rate limiting, reset after timeout

  3. Run client request

    • curl -I 127.0.0.1:8080/hello
    • curl -H "X-Forwarded-For: 1.2.5.4:8080" -I 127.0.0.1:8080/hello

Example

go run main.go -duration 1s -ipLimit 2

dcard-middleware

Rate Limiting 1000 times in an hour for each IP address response X-RateLimit-Remaining (remains time to visit) and X-RateLimit-Reset (time to reset)

  • count client visiting counts
  • add timeout for each IP address
  • add get/remove test (mem)
  • add get/remove test (Redis)
  • add Redis Ring (test only)
  • use PXAT if alicebob/miniredis is available for redis v6.2
  • add atomic for mem

QA

Why use Redis, instead of golang map?

INCR and EXPIRE are useful

ref: https://redislabs.com/redis-best-practices/basic-rate-limiting/