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# frozen_string_literal: true
require 'doorkeeper/grape/authorization_decorator'
class Rack::Attack
class Request
def authenticated_token
return @token if defined?(@token)
@token = Doorkeeper::OAuth::Token.authenticate(
Doorkeeper::Grape::AuthorizationDecorator.new(self),
*Doorkeeper.configuration.access_token_methods
)
end
def remote_ip
@remote_ip ||= (@env["action_dispatch.remote_ip"] || ip).to_s
end
def throttleable_remote_ip
@throttleable_remote_ip ||= begin
ip = IPAddr.new(remote_ip)
if ip.ipv6?
ip.mask(64)
else
ip
end
end.to_s
end
def authenticated_user_id
authenticated_token&.resource_owner_id
end
def authenticated_token_id
authenticated_token&.id
end
def unauthenticated?
!authenticated_user_id
end
def api_request?
path.start_with?('/api')
end
def path_matches?(other_path)
/\A#{Regexp.escape(other_path)}(\..*)?\z/ =~ path
end
def web_request?
!api_request?
end
def paging_request?
params['page'].present? || params['min_id'].present? || params['max_id'].present? || params['since_id'].present?
end
end
Rack::Attack.safelist('allow from localhost') do |req|
req.remote_ip == '127.0.0.1' || req.remote_ip == '::1'
end
Rack::Attack.blocklist('deny from blocklist') do |req|
IpBlock.blocked?(req.remote_ip)
end
throttle('throttle_authenticated_api', limit: 1_500, period: 5.minutes) do |req|
req.authenticated_user_id if req.api_request?
end
throttle('throttle_per_token_api', limit: 300, period: 5.minutes) do |req|
req.authenticated_token_id if req.api_request?
end
throttle('throttle_unauthenticated_api', limit: 300, period: 5.minutes) do |req|
req.throttleable_remote_ip if req.api_request? && req.unauthenticated?
end
throttle('throttle_api_media', limit: 30, period: 30.minutes) do |req|
req.authenticated_user_id if req.post? && req.path.match?(/\A\/api\/v\d+\/media\z/i)
end
throttle('throttle_media_proxy', limit: 30, period: 10.minutes) do |req|
req.throttleable_remote_ip if req.path.start_with?('/media_proxy')
end
throttle('throttle_api_sign_up', limit: 5, period: 30.minutes) do |req|
req.throttleable_remote_ip if req.post? && req.path == '/api/v1/accounts'
end
throttle('throttle_authenticated_paging', limit: 300, period: 15.minutes) do |req|
req.authenticated_user_id if req.paging_request?
end
throttle('throttle_unauthenticated_paging', limit: 300, period: 15.minutes) do |req|
req.throttleable_remote_ip if req.paging_request? && req.unauthenticated?
end
API_DELETE_REBLOG_REGEX = /\A\/api\/v1\/statuses\/[\d]+\/unreblog\z/.freeze
API_DELETE_STATUS_REGEX = /\A\/api\/v1\/statuses\/[\d]+\z/.freeze
throttle('throttle_api_delete', limit: 30, period: 30.minutes) do |req|
req.authenticated_user_id if (req.post? && req.path.match?(API_DELETE_REBLOG_REGEX)) || (req.delete? && req.path.match?(API_DELETE_STATUS_REGEX))
end
throttle('throttle_sign_up_attempts/ip', limit: 25, period: 5.minutes) do |req|
req.throttleable_remote_ip if req.post? && req.path_matches?('/auth')
end
throttle('throttle_password_resets/ip', limit: 25, period: 5.minutes) do |req|
req.throttleable_remote_ip if req.post? && req.path_matches?('/auth/password')
end
throttle('throttle_password_resets/email', limit: 5, period: 30.minutes) do |req|
req.params.dig('user', 'email').presence if req.post? && req.path_matches?('/auth/password')
end
throttle('throttle_email_confirmations/ip', limit: 25, period: 5.minutes) do |req|
req.throttleable_remote_ip if req.post? && (req.path_matches?('/auth/confirmation') || req.path == '/api/v1/emails/confirmations')
end
throttle('throttle_email_confirmations/email', limit: 5, period: 30.minutes) do |req|
if req.post? && req.path_matches?('/auth/password')
req.params.dig('user', 'email').presence
elsif req.post? && req.path == '/api/v1/emails/confirmations'
req.authenticated_user_id
end
end
throttle('throttle_login_attempts/ip', limit: 25, period: 5.minutes) do |req|
req.throttleable_remote_ip if req.post? && req.path_matches?('/auth/sign_in')
end
throttle('throttle_login_attempts/email', limit: 25, period: 1.hour) do |req|
req.session[:attempt_user_id] || req.params.dig('user', 'email').presence if req.post? && req.path_matches?('/auth/sign_in')
end
self.throttled_responder = lambda do |request|
now = Time.now.utc
match_data = request.env['rack.attack.match_data']
headers = {
'Content-Type' => 'application/json',
'X-RateLimit-Limit' => match_data[:limit].to_s,
'X-RateLimit-Remaining' => '0',
'X-RateLimit-Reset' => (now + (match_data[:period] - now.to_i % match_data[:period])).iso8601(6),
}
[429, headers, [{ error: I18n.t('errors.429') }.to_json]]
end
end
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