271 lines
7.8 KiB
Python
271 lines
7.8 KiB
Python
# -*- coding: utf-8 -*-
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Exception classes and logic for cratonclient."""
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class ClientException(Exception):
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"""Base exception class for all exceptions in cratonclient."""
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message = None
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def __init__(self, message=None):
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"""Initialize our exception instance with our class level message."""
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if message is None:
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if self.message is None:
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message = self.__class__.__name__
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else:
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message = self.message
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super(ClientException, self).__init__(message)
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class Timeout(ClientException):
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"""Catch-all class for connect and read timeouts from requests."""
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message = 'Request timed out'
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def __init__(self, message=None, **kwargs):
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"""Initialize our Timeout exception.
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This takes an optional keyword-only argument of
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``original_exception``.
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"""
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self.original_exception = kwargs.pop('exception', None)
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super(Timeout, self).__init__(message)
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class HTTPError(ClientException):
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"""Base exception class for all HTTP related exceptions in."""
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message = "An error occurred while talking to the remote server."
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status_code = None
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def __init__(self, message=None, **kwargs):
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"""Initialize our HTTPError instance.
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Optional keyword-only arguments include:
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- response: for the response generating the error
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- original_exception: in the event that this is a requests exception
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that we are re-raising.
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"""
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self.response = kwargs.pop('response', None)
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self.original_exception = kwargs.pop('exception', None)
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self.status_code = (self.status_code
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or getattr(self.response, 'status_code', None))
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super(HTTPError, self).__init__(message)
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@property
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def status_code(self):
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"""Shim to provide a similar API to other OpenStack clients."""
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return self.status_code
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@status_code.setter
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def status_code(self, code):
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self.status_code = code
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class ConnectionFailed(HTTPError):
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"""Connecting to the server failed."""
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message = "An error occurred while connecting to the server."""
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class HTTPClientError(HTTPError):
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"""Base exception for client side errors (4xx status codes)."""
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message = "Something went wrong with the request."""
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class BadRequest(HTTPClientError):
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"""Client sent a malformed request."""
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status_code = 400
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message = "The request sent to the server was invalid."
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class Unauthorized(HTTPClientError):
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"""Client is unauthorized to access the resource in question."""
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status_code = 401
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message = ("The user has either provided insufficient parameters for "
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"authentication or is not authorized to access this resource.")
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class Forbidden(HTTPClientError):
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"""Client is forbidden to access the resource."""
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status_code = 403
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message = ("The user was unable to access the resource because they are "
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"forbidden.")
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class NotFound(HTTPClientError):
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"""Resource could not be found."""
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status_code = 404
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message = "The requested resource was not found."""
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class MethodNotAllowed(HTTPClientError):
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"""The request method is not supported."""
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status_code = 405
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message = "The method used in the request is not supported."
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class NotAcceptable(HTTPClientError):
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"""The requested resource can not respond with acceptable content.
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Based on the Accept headers specified by the client, the resource can not
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generate content that is an acceptable content-type.
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"""
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status_code = 406
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message = "The resource can not return acceptable content."
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class ProxyAuthenticationRequired(HTTPClientError):
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"""The client must first authenticate itself with the proxy."""
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status_code = 407
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message = "The client must first authenticate itself with a proxy."
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class Conflict(HTTPClientError):
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"""The request presents a conflict."""
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status_code = 409
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message = "The request could not be processed due to a conflict."
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class Gone(HTTPClientError):
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"""The requested resource is no longer available.
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The resource requested is no longer available and will not be available
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again.
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"""
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status_code = 410
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message = ("The resource requested is no longer available and will not be"
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" available again.")
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class LengthRequired(HTTPClientError):
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"""The request did not specify a Content-Length header."""
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status_code = 411
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message = ("The request did not contain a Content-Length header but one"
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" was required by the resource.")
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class PreconditionFailed(HTTPClientError):
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"""The server failed to meet one of the preconditions in the request."""
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status_code = 412
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message = ("The server failed to meet one of the preconditions in the "
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"request.")
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class RequestEntityTooLarge(HTTPClientError):
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"""The request is larger than the server is willing or able to process."""
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status_code = 413
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message = ("The request is larger than the server is willing or able to "
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"process.")
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class RequestUriTooLong(HTTPClientError):
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"""The URI provided was too long for the server to process."""
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status_code = 414
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message = "The URI provided was too long for the server to process."
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class UnsupportedMediaType(HTTPClientError):
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"""The request entity has a media type which is unsupported."""
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status_code = 415
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message = ("The request entity has a media type which is unsupported by "
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"the server or resource.")
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class RequestedRangeNotSatisfiable(HTTPClientError):
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"""The requestor wanted a range but the server was unable to provide it."""
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status_code = 416
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message = ("The requestor wanted a range but the server was unable to "
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"provide it.")
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class UnprocessableEntity(HTTPClientError):
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"""There were semantic errors in the request."""
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status_code = 422
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message = ("The request is of a valid content-type and structure but "
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"semantically invalid.")
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_4xx_classes = [
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BadRequest,
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Unauthorized,
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Forbidden,
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NotFound,
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MethodNotAllowed,
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NotAcceptable,
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ProxyAuthenticationRequired,
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Conflict,
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Gone,
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LengthRequired,
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PreconditionFailed,
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RequestEntityTooLarge,
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RequestUriTooLong,
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UnsupportedMediaType,
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RequestedRangeNotSatisfiable,
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UnprocessableEntity,
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]
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_4xx_codes = {cls.status_code: cls for cls in _4xx_classes}
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class HTTPServerError(HTTPError):
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"""The server encountered an error it could not recover from."""
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message = "HTTP Server-side Error"
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class InternalServerError(HTTPServerError):
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"""The server encountered an error it could not recover from."""
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status_code = 500
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message = ("There was an internal server error that could not be recovered"
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" from.")
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_5xx_classes = [
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InternalServerError,
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# NOTE(sigmavirus24): Allow for future expansion
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]
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_5xx_codes = {cls.status_code: cls for cls in _5xx_classes}
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def error_from(response):
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"""Find an error code that matches a response status_code."""
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if 400 <= response.status_code < 500:
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cls = _4xx_codes.get(response.status_code, HTTPClientError)
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elif 500 <= response.status_code < 600:
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cls = _5xx_codes.get(response.status_code, HTTPServerError)
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else:
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cls = HTTPError
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return cls(response=response)
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