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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.
import re
class Error(StandardError):
"""Base error class.
Child classes should define an HTTP status code, title, and a doc string.
"""
code = None
title = None
def __init__(self, message=None, **kwargs):
"""Use the doc string as the error message by default."""
message = message or self.__doc__ % kwargs
super(Error, self).__init__(message)
def __str__(self):
"""Cleans up line breaks and indentation from doc strings."""
string = super(Error, self).__str__()
string = re.sub('[ \n]+', ' ', string)
string = string.strip()
return string
class ValidationError(Error):
"""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 Unauthorized(Error):
"""The request you have made requires authentication."""
code = 401
title = 'Not Authorized'
class Forbidden(Error):
"""You are not authorized to perform the requested action."""
code = 403
title = 'Not Authorized'
class ForbiddenAction(Forbidden):
"""You are not authorized to perform the requested action: %(action)s"""
class NotFound(Error):
"""Could not find: %(target)s"""
code = 404
title = 'Not Found'
class EndpointNotFound(NotFound):
"""Could not find endpoint: %(endpoint_id)s"""
class MetadataNotFound(NotFound):
"""An unhandled exception has occurred: Could not find metadata."""
# (dolph): metadata is not a user-facing concept,
# so this exception should not be exposed
class PolicyNotFound(NotFound):
"""Could not find policy: %(policy_id)s"""
class RoleNotFound(NotFound):
"""Could not find role: %(role_id)s"""
class ServiceNotFound(NotFound):
"""Could not find service: %(service_id)s"""
class TenantNotFound(NotFound):
"""Could not find tenant: %(tenant_id)s"""
class TokenNotFound(NotFound):
"""Could not find token: %(token_id)s"""
class UserNotFound(NotFound):
"""Could not find user: %(user_id)s"""
class Conflict(Error):
"""Conflict occurred attempting to store %(type)s.
%(details)s
"""
code = 409
title = 'Conflict'
class UnexpectedError(Error):
"""An unexpected error prevented the server from fulfilling your request.
%(exception)s
"""
code = 500
title = 'Internal Server Error'
class MalformedEndpoint(UnexpectedError):
"""Malformed endpoint URL (see ERROR log for details): %(endpoint)s"""
class NotImplemented(Error):
"""The action you have requested has not been implemented."""
code = 501
title = 'Not Implemented'
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