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# Copyright 2011 VMware, Inc
# All Rights Reserved.
#
# 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 tackerclient.i18n import _
"""
Tacker base exception handling.
Exceptions are classified into three categories:
* Exceptions corresponding to exceptions from tacker server:
This type of exceptions should inherit one of exceptions
in HTTP_EXCEPTION_MAP.
* Exceptions from client library:
This type of exceptions should inherit TackerClientException.
* Exceptions from CLI code:
This type of exceptions should inherit TackerCLIError.
"""
class TackerException(Exception):
"""Base Tacker Exception.
To correctly use this class, inherit from it and define
a 'message' property. That message will get printf'd
with the keyword arguments provided to the constructor.
"""
message = _("An unknown exception occurred.")
def __init__(self, message=None, **kwargs):
if message:
self.message = message
try:
self._error_string = self.message % kwargs
except Exception:
# at least get the core message out if something happened
self._error_string = self.message
def __str__(self):
return self._error_string
class TackerClientException(TackerException):
"""Base exception which exceptions from Tacker are mapped into.
NOTE: on the client side, we use different exception types in order
to allow client library users to handle server exceptions in try...except
blocks. The actual error message is the one generated on the server side.
"""
status_code = 0
def __init__(self, message=None, **kwargs):
if 'status_code' in kwargs:
self.status_code = kwargs['status_code']
super(TackerClientException, self).__init__(message, **kwargs)
# Base exceptions from Tacker
class BadRequest(TackerClientException):
status_code = 400
class Unauthorized(TackerClientException):
status_code = 401
message = _("Unauthorized: bad credentials.")
class Forbidden(TackerClientException):
status_code = 403
message = _("Forbidden: your credentials don't give you access to this "
"resource.")
class NotFound(TackerClientException):
status_code = 404
class Conflict(TackerClientException):
status_code = 409
class InternalServerError(TackerClientException):
status_code = 500
class ServiceUnavailable(TackerClientException):
status_code = 503
HTTP_EXCEPTION_MAP = {
400: BadRequest,
401: Unauthorized,
403: Forbidden,
404: NotFound,
409: Conflict,
500: InternalServerError,
503: ServiceUnavailable,
}
# Exceptions from client library
class NoAuthURLProvided(Unauthorized):
message = _("auth_url was not provided to the Tacker client")
class EndpointNotFound(TackerClientException):
message = _("Could not find Service or Region in Service Catalog.")
class EndpointTypeNotFound(TackerClientException):
message = _("Could not find endpoint type %(type_)s in Service Catalog.")
class RequestURITooLong(TackerClientException):
"""Raised when a request fails with HTTP error 414."""
def __init__(self, **kwargs):
self.excess = kwargs.get('excess', 0)
super(RequestURITooLong, self).__init__(**kwargs)
class ConnectionFailed(TackerClientException):
message = _("Connection to tacker failed: %(reason)s")
class SslCertificateValidationError(TackerClientException):
message = _("SSL certificate validation has failed: %(reason)s")
class MalformedResponseBody(TackerClientException):
message = _("Malformed response body: %(reason)s")
class InvalidContentType(TackerClientException):
message = _("Invalid content type %(content_type)s.")
class InvalidInput(TackerClientException):
message = _("Invalid input: %(reason)s")
class EmptyInput(TackerClientException):
message = _("Empty input: %(reason)s")
class UnsupportedCommandVersion(TackerClientException):
message = _("This command is not supported in version %(version)s")
# Command line exceptions
class TackerCLIError(TackerException):
"""Exception raised when command line parsing fails."""
pass
class CommandError(TackerCLIError):
pass
class UnsupportedVersion(TackerCLIError):
"""Unsupported Version.
Indicates that the user is trying to use an unsupported version of
the API.
"""
pass
class TackerClientNoUniqueMatch(TackerCLIError):
message = _("Multiple %(resource)s matches found for name '%(name)s',"
" use an ID to be more specific.")
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