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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 authenticated_user_id
authenticated_token&.resource_owner_id
end
def unauthenticated?
!authenticated_user_id
end
def api_request?
path.start_with?('/api')
end
def web_request?
!api_request?
end
end
PROTECTED_PATHS = %w(
/auth/sign_in
/auth
/auth/password
).freeze
PROTECTED_PATHS_REGEX = Regexp.union(PROTECTED_PATHS.map { |path| /\A#{Regexp.escape(path)}/ })
# Always allow requests from localhost
# (blocklist & throttles are skipped)
Rack::Attack.safelist('allow from localhost') do |req|
# Requests are allowed if the return value is truthy
'127.0.0.1' == req.ip || '::1' == req.ip
end
throttle('throttle_authenticated_api', limit: 300, period: 5.minutes) do |req|
req.api_request? && req.authenticated_user_id
end
throttle('throttle_unauthenticated_api', limit: 300, period: 5.minutes) do |req|
req.ip if req.api_request? && req.unauthenticated?
end
throttle('protected_paths', limit: 5, period: 5.minutes) do |req|
req.ip if req.post? && req.path =~ PROTECTED_PATHS_REGEX
end
self.throttled_response = lambda do |env|
now = Time.now.utc
match_data = 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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