docker-compose/fig/packages/docker/errors.py

#    Copyright 2014 dotCloud inc.
#    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 requests


class APIError(requests.exceptions.HTTPError):
    def __init__(self, message, response, explanation=None):
        # requests 1.2 supports response as a keyword argument, but
        # requests 1.1 doesn't
        super(APIError, self).__init__(message)
        self.response = response

        self.explanation = explanation

        if self.explanation is None and response.content:
            self.explanation = response.content.strip()

    def __str__(self):
        message = super(APIError, self).__str__()

        if self.is_client_error():
            message = '%s Client Error: %s' % (
                self.response.status_code, self.response.reason)

        elif self.is_server_error():
            message = '%s Server Error: %s' % (
                self.response.status_code, self.response.reason)

        if self.explanation:
            message = '%s ("%s")' % (message, self.explanation)

        return message

    def is_client_error(self):
        return 400 <= self.response.status_code < 500

    def is_server_error(self):
        return 500 <= self.response.status_code < 600


class DockerException(Exception):
    pass


class InvalidRepository(DockerException):
    pass


class InvalidConfigFile(DockerException):
    pass