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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 OpenStack LLC
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from keystone.common import config
from keystone.common import logging
from keystone.openstack.common.gettextutils import _ # noqa
CONF = config.CONF
LOG = logging.getLogger(__name__)
# Tests use this to make exception message format errors fatal
_FATAL_EXCEPTION_FORMAT_ERRORS = False
class Error(StandardError):
"""Base error class.
Child classes should define an HTTP status code, title, and a
message_format.
"""
code = None
title = None
message_format = None
def __init__(self, message=None, **kwargs):
try:
message = self._build_message(message, **kwargs)
except KeyError:
# if you see this warning in your logs, please raise a bug report
if _FATAL_EXCEPTION_FORMAT_ERRORS:
raise
else:
LOG.warning(_('missing exception kwargs (programmer error)'))
message = self.message_format
super(Error, self).__init__(message)
def _build_message(self, message, **kwargs):
"""Builds and returns an exception message.
:raises: KeyError given insufficient kwargs
"""
if not message:
message = self.message_format % kwargs
return message
class ValidationError(Error):
message_format = _("Expecting to find %(attribute)s in %(target)s."
" The server could not comply with the request"
" since it is either malformed or otherwise"
" incorrect. The client is assumed to be in error.")
code = 400
title = 'Bad Request'
class StringLengthExceeded(ValidationError):
message_format = _("String length exceeded.The length of"
" string '%(string)s' exceeded the limit"
" of column %(type)s(CHAR(%(length)d)).")
class ValidationSizeError(Error):
message_format = _("Request attribute %(attribute)s must be"
" less than or equal to %(size)i. The server"
" could not comply with the request because"
" the attribute size is invalid (too large)."
" The client is assumed to be in error.")
code = 400
title = 'Bad Request'
class SecurityError(Error):
"""Avoids exposing details of security failures, unless in debug mode."""
def _build_message(self, message, **kwargs):
"""Only returns detailed messages in debug mode."""
if CONF.debug:
return message or self.message_format % kwargs
else:
return self.message_format % kwargs
class Unauthorized(SecurityError):
message_format = _("The request you have made requires authentication.")
code = 401
title = 'Unauthorized'
class AuthPluginException(Unauthorized):
message_format = _("Authentication plugin error.")
def __init__(self, *args, **kwargs):
super(AuthPluginException, self).__init__(*args, **kwargs)
self.authentication = {}
class AuthMethodNotSupported(AuthPluginException):
message_format = _("Attempted to authenticate with an unsupported method.")
def __init__(self, *args, **kwargs):
super(AuthMethodNotSupported, self).__init__(*args, **kwargs)
self.authentication = {'methods': CONF.auth.methods}
class AdditionalAuthRequired(AuthPluginException):
message_format = _("Additional authentications steps required.")
def __init__(self, auth_response=None, **kwargs):
super(AdditionalAuthRequired, self).__init__(message=None, **kwargs)
self.authentication = auth_response
class Forbidden(SecurityError):
message_format = _("You are not authorized to perform the"
" requested action.")
code = 403
title = 'Forbidden'
class ForbiddenAction(Forbidden):
message_format = _("You are not authorized to perform the"
" requested action, %(action)s.")
class NotFound(Error):
message_format = _("Could not find, %(target)s.")
code = 404
title = 'Not Found'
class EndpointNotFound(NotFound):
message_format = _("Could not find endpoint, %(endpoint_id)s.")
class MetadataNotFound(NotFound):
"""(dolph): metadata is not a user-facing concept,
so this exception should not be exposed
"""
message_format = _("An unhandled exception has occurred:"
" Could not find metadata.")
class PolicyNotFound(NotFound):
message_format = _("Could not find policy, %(policy_id)s.")
class RoleNotFound(NotFound):
message_format = _("Could not find role, %(role_id)s.")
class ServiceNotFound(NotFound):
message_format = _("Could not find service, %(service_id)s.")
class DomainNotFound(NotFound):
message_format = _("Could not find domain, %(domain_id)s.")
class ProjectNotFound(NotFound):
message_format = _("Could not find project, %(project_id)s.")
class TokenNotFound(NotFound):
message_format = _("Could not find token, %(token_id)s.")
class UserNotFound(NotFound):
message_format = _("Could not find user, %(user_id)s.")
class GroupNotFound(NotFound):
message_format = _("Could not find group, %(group_id)s.")
class TrustNotFound(NotFound):
message_format = _("Could not find trust, %(trust_id)s.")
class CredentialNotFound(NotFound):
message_format = _("Could not find credential, %(credential_id)s.")
class VersionNotFound(NotFound):
message_format = _("Could not find version, %(version)s.")
class Conflict(Error):
message_format = _("Conflict occurred attempting to store %(type)s."
" %(details)s")
code = 409
title = 'Conflict'
class RequestTooLarge(Error):
message_format = _("Request is too large.")
code = 413
title = 'Request is too large.'
class UnexpectedError(Error):
message_format = _("An unexpected error prevented the server"
" from fulfilling your request. %(exception)s")
code = 500
title = 'Internal Server Error'
class MalformedEndpoint(UnexpectedError):
message_format = _("Malformed endpoint URL (%(endpoint)s),"
" see ERROR log for details.")
class NotImplemented(Error):
message_format = _("The action you have requested has not"
" been implemented.")
code = 501
title = 'Not Implemented'
class PasteConfigNotFound(UnexpectedError):
message_format = _("The Keystone paste configuration file"
" %(config_file)s could not be found.")
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