mirror of https://github.com/Siphonay/mastodon
65 lines
1.2 KiB
Ruby
65 lines
1.2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class RateLimiter
|
|
include Redisable
|
|
|
|
FAMILIES = {
|
|
follows: {
|
|
limit: 400,
|
|
period: 24.hours.freeze,
|
|
}.freeze,
|
|
|
|
statuses: {
|
|
limit: 300,
|
|
period: 3.hours.freeze,
|
|
}.freeze,
|
|
|
|
reports: {
|
|
limit: 400,
|
|
period: 24.hours.freeze,
|
|
}.freeze,
|
|
}.freeze
|
|
|
|
def initialize(by, options = {})
|
|
@by = by
|
|
@family = options[:family]
|
|
@limit = FAMILIES[@family][:limit]
|
|
@period = FAMILIES[@family][:period].to_i
|
|
end
|
|
|
|
def record!
|
|
count = redis.get(key)
|
|
|
|
if count.nil?
|
|
redis.set(key, 0)
|
|
redis.expire(key, (@period - (last_epoch_time % @period) + 1).to_i)
|
|
end
|
|
|
|
raise Mastodon::RateLimitExceededError if count.present? && count.to_i >= @limit
|
|
|
|
redis.incr(key)
|
|
end
|
|
|
|
def rollback!
|
|
redis.decr(key)
|
|
end
|
|
|
|
def to_headers(now = Time.now.utc)
|
|
{
|
|
'X-RateLimit-Limit' => @limit.to_s,
|
|
'X-RateLimit-Remaining' => (@limit - (redis.get(key) || 0).to_i).to_s,
|
|
'X-RateLimit-Reset' => (now + (@period - now.to_i % @period)).iso8601(6),
|
|
}
|
|
end
|
|
|
|
private
|
|
|
|
def key
|
|
@key ||= "rate_limit:#{@by.id}:#{@family}:#{(last_epoch_time / @period).to_i}"
|
|
end
|
|
|
|
def last_epoch_time
|
|
@last_epoch_time ||= Time.now.to_i
|
|
end
|
|
end
|