HTTP のステータスコードに対応した例外クラス

html_exception.rb

module HTTP
  class BaseError < StandardError; end

  class ClientError < BaseError; end
  class BadRequest                   < ClientError; end
  class Unauthorized                 < ClientError; end
  class PaymentRequired              < ClientError; end
  class Forbidden                    < ClientError; end
  class NotFound                     < ClientError; end
  class MethodNotAllowed             < ClientError; end
  class NotAcceptable                < ClientError; end
  class ProxyAuthenticationRequired  < ClientError; end
  class RequestTimeout               < ClientError; end
  class Conflict                     < ClientError; end
  class Gone                         < ClientError; end
  class LengthRequired               < ClientError; end
  class PreconditionFailed           < ClientError; end
  class RequestEntityTooLarge        < ClientError; end
  class RequestURITooLong            < ClientError; end
  class UnsupportedMediaType         < ClientError; end
  class RequestedRangeNotSatisfiable < ClientError; end
  class ExpectationFailed            < ClientError; end
  class Im_a_teapot                  < ClientError; end
  class UnprocessableEntity          < ClientError; end
  class Locked                       < ClientError; end
  class FailedDependency             < ClientError; end
  class UnorderedCollection          < ClientError; end
  class UpgradeRequired              < ClientError; end

  class ServerError < BaseError; end
  class InternalServerError     < ServerError; end
  class NotImplemented          < ServerError; end
  class BadGateway              < ServerError; end
  class ServiceUnavailable      < ServerError; end
  class GatewayTimeout          < ServerError; end
  class HTTPVersionNotSupported < ServerError; end
  class VariantAlsoNegotiates   < ServerError; end
  class InsufficientStorage     < ServerError; end
  class NotExtended             < ServerError; end
end