python-glanceclient/glanceclient/exc.py

# Copyright 2012 OpenStack LLC.
# 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.

import sys


class CommandError(Exception):
    """Invalid usage of CLI"""
    pass


class InvalidEndpoint(ValueError):
    """The provided endpoint could not be used"""
    pass


class ClientException(Exception):
    """DEPRECATED"""


class HTTPException(ClientException):
    """Base exception for all HTTP-derived exceptions"""
    code = 'N/A'

    def __init__(self, details=None):
        self.details = details

    def __str__(self):
        return "%s (HTTP %s)" % (self.__class__.__name__, self.code)


class BadRequest(HTTPException):
    """DEPRECATED"""
    code = 400


class HTTPBadRequest(BadRequest):
    pass


class Unauthorized(HTTPException):
    """DEPRECATED"""
    code = 401


class HTTPUnauthorized(Unauthorized):
    pass


class Forbidden(HTTPException):
    """DEPRECATED"""
    code = 403


class HTTPForbidden(Forbidden):
    pass


class NotFound(HTTPException):
    """DEPRECATED"""
    code = 404


class HTTPNotFound(NotFound):
    pass


class HTTPMethodNotAllowed(HTTPException):
    code = 405


class Conflict(HTTPException):
    """DEPRECATED"""
    code = 409


class HTTPConflict(Conflict):
    pass


class OverLimit(HTTPException):
    """DEPRECATED"""
    code = 413


class HTTPOverLimit(OverLimit):
    pass


class HTTPInternalServerError(HTTPException):
    code = 500


class HTTPNotImplemented(HTTPException):
    code = 501


class HTTPBadGateway(HTTPException):
    code = 502


class ServiceUnavailable(HTTPException):
    """DEPRECATED"""
    code = 503


class HTTPServiceUnavailable(ServiceUnavailable):
    pass


#NOTE(bcwaldon): Build a mapping of HTTP codes to corresponding exception
# classes
_code_map = {}
for obj_name in dir(sys.modules[__name__]):
    if obj_name.startswith('HTTP'):
        obj = getattr(sys.modules[__name__], obj_name)
        _code_map[obj.code] = obj


def from_response(response):
    """Return an instance of an HTTPException based on httplib response."""
    cls = _code_map.get(response.status, HTTPException)
    return cls()


class NoTokenLookupException(Exception):
    """DEPRECATED"""
    pass


class EndpointNotFound(Exception):
    """DEPRECATED"""
    pass