Class: BetterAuth::RateLimiter

Inherits:
Object
  • Object
show all
Defined in:
lib/better_auth/rate_limiter.rb

Defined Under Namespace

Classes: MemoryStore

Constant Summary collapse

MISSING_CLIENT_IP_WARNING = 
"Rate limiting skipped: could not determine client IP address. " \
"Ensure your runtime forwards a trusted client IP header and configure `advanced.ipAddress.ipAddressHeaders` if needed."

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RateLimiter

Returns a new instance of RateLimiter.



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# File 'lib/better_auth/rate_limiter.rb', line 40

def initialize
  @memory_store = MemoryStore.new
  @warned_missing_client_ip = false
end

Instance Method Details

#call(request, context, path) ⇒ Object 



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# File 'lib/better_auth/rate_limiter.rb', line 45

def call(request, context, path)
  config = context.rate_limit_config || {}
  return unless config[:enabled]

  ip = client_ip(request, context.options)
  warn_missing_client_ip(context) unless ip
  return unless ip

  rule = rate_limit_rule(request, context, config, path)
  return if rule == false

  window = rule[:window] || 10
  max = rule[:max] || 100
  key = rate_limit_key(ip, path)
  now = Time.now.to_f
  storage = storage_for(context, config)
  data = read_storage(storage, key)

  unless data
    write_storage(storage, key, rate_limit_data(key, 1, now), ttl: window, update: false)
    return
  end

  last_request = data.fetch(:last_request).to_f
  count = data.fetch(:count).to_i
  if should_rate_limit?(max.to_i, window.to_f, count, last_request, now)
    return rate_limit_response(retry_after(last_request, window.to_f, now))
  end

  next_data = if now - last_request > window.to_f
    rate_limit_data(key, 1, now)
  else
    rate_limit_data(key, count + 1, now)
  end

  write_storage(storage, key, next_data, ttl: window, update: true)
  nil
end