# frozen_string_literal: true require 'doorkeeper/grape/authorization_decorator' class Rack::Attack class Request def authenticated_token return @authenticated_token if defined?(@authenticated_token) @authenticated_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 == '127.0.0.2' || 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?(%r{\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 = %r{\A/api/v1/statuses/\d+/unreblog\z} API_DELETE_STATUS_REGEX = %r{\A/api/v1/statuses/\d+\z} 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