# Copyright 2010 Jacob Kaplan-Moss
# Copyright 2011 Nebula, Inc.
# Copyright 2013 Alessio Ababilov
# Copyright 2013 OpenStack Foundation
# 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.
"""
Exception definitions.
"""
from http import client as http_client
import inspect
import sys
from ironicclient.common.i18n import _
[docs]
class ClientException(Exception):
"""The base exception class for all exceptions this library raises."""
pass
[docs]
class ValidationError(ClientException):
"""Error in validation on API client side."""
pass
[docs]
class UnsupportedVersion(ClientException):
"""User is trying to use an unsupported version of the API."""
pass
[docs]
class CommandError(ClientException):
"""Error in CLI tool."""
pass
[docs]
class AuthorizationFailure(ClientException):
"""Cannot authorize API client."""
pass
[docs]
class ConnectionError(ClientException):
"""Cannot connect to API service."""
pass
[docs]
class ConnectionRefused(ConnectionError):
"""Connection refused while trying to connect to API service."""
pass
[docs]
class AuthPluginOptionsMissing(AuthorizationFailure):
"""Auth plugin misses some options."""
def __init__(self, opt_names):
super(AuthPluginOptionsMissing, self).__init__(
_("Authentication failed. Missing options: %s") %
", ".join(opt_names))
self.opt_names = opt_names
[docs]
class AuthSystemNotFound(AuthorizationFailure):
"""User has specified an AuthSystem that is not installed."""
def __init__(self, auth_system):
super(AuthSystemNotFound, self).__init__(
_("AuthSystemNotFound: %r") % auth_system)
self.auth_system = auth_system
[docs]
class NoUniqueMatch(ClientException):
"""Multiple entities found instead of one."""
pass
[docs]
class EndpointException(ClientException):
"""Something is rotten in Service Catalog."""
pass
[docs]
class EndpointNotFound(EndpointException):
"""Could not find requested endpoint in Service Catalog."""
pass
[docs]
class AmbiguousEndpoints(EndpointException):
"""Found more than one matching endpoint in Service Catalog."""
def __init__(self, endpoints=None):
super(AmbiguousEndpoints, self).__init__(
_("AmbiguousEndpoints: %r") % endpoints)
self.endpoints = endpoints
[docs]
class HttpError(ClientException):
"""The base exception class for all HTTP exceptions."""
http_status = 0
message = _("HTTP Error")
def __init__(self, message=None, details=None,
response=None, request_id=None,
url=None, method=None, http_status=None):
self.http_status = http_status or self.http_status
self.message = message or self.message
self.details = details
self.request_id = request_id
self.response = response
self.url = url
self.method = method
formatted_string = "%s (HTTP %s)" % (self.message, self.http_status)
if request_id:
formatted_string += " (Request-ID: %s)" % request_id
super(HttpError, self).__init__(formatted_string)
[docs]
class HTTPRedirection(HttpError):
"""HTTP Redirection."""
message = _("HTTP Redirection")
[docs]
class HTTPClientError(HttpError):
"""Client-side HTTP error.
Exception for cases in which the client seems to have erred.
"""
message = _("HTTP Client Error")
[docs]
class HttpServerError(HttpError):
"""Server-side HTTP error.
Exception for cases in which the server is aware that it has
erred or is incapable of performing the request.
"""
message = _("HTTP Server Error")
[docs]
class MultipleChoices(HTTPRedirection):
"""HTTP 300 - Multiple Choices.
Indicates multiple options for the resource that the client may follow.
"""
http_status = http_client.MULTIPLE_CHOICES
message = _("Multiple Choices")
[docs]
class BadRequest(HTTPClientError):
"""HTTP 400 - Bad Request.
The request cannot be fulfilled due to bad syntax.
"""
http_status = http_client.BAD_REQUEST
message = _("Bad Request")
[docs]
class Unauthorized(HTTPClientError):
"""HTTP 401 - Unauthorized.
Similar to 403 Forbidden, but specifically for use when authentication
is required and has failed or has not yet been provided.
"""
http_status = http_client.UNAUTHORIZED
message = _("Unauthorized")
[docs]
class PaymentRequired(HTTPClientError):
"""HTTP 402 - Payment Required.
Reserved for future use.
"""
http_status = http_client.PAYMENT_REQUIRED
message = _("Payment Required")
[docs]
class Forbidden(HTTPClientError):
"""HTTP 403 - Forbidden.
The request was a valid request, but the server is refusing to respond
to it.
"""
http_status = http_client.FORBIDDEN
message = _("Forbidden")
[docs]
class NotFound(HTTPClientError):
"""HTTP 404 - Not Found.
The requested resource could not be found but may be available again
in the future.
"""
http_status = http_client.NOT_FOUND
message = _("Not Found")
[docs]
class MethodNotAllowed(HTTPClientError):
"""HTTP 405 - Method Not Allowed.
A request was made of a resource using a request method not supported
by that resource.
"""
http_status = http_client.METHOD_NOT_ALLOWED
message = _("Method Not Allowed")
[docs]
class NotAcceptable(HTTPClientError):
"""HTTP 406 - Not Acceptable.
The requested resource is only capable of generating content not
acceptable according to the Accept headers sent in the request.
"""
http_status = http_client.NOT_ACCEPTABLE
message = _("Not Acceptable")
[docs]
class ProxyAuthenticationRequired(HTTPClientError):
"""HTTP 407 - Proxy Authentication Required.
The client must first authenticate itself with the proxy.
"""
http_status = http_client.PROXY_AUTHENTICATION_REQUIRED
message = _("Proxy Authentication Required")
[docs]
class RequestTimeout(HTTPClientError):
"""HTTP 408 - Request Timeout.
The server timed out waiting for the request.
"""
http_status = http_client.REQUEST_TIMEOUT
message = _("Request Timeout")
[docs]
class Conflict(HTTPClientError):
"""HTTP 409 - Conflict.
Indicates that the request could not be processed because of conflict
in the request, such as an edit conflict.
"""
http_status = http_client.CONFLICT
message = _("Conflict")
[docs]
class Gone(HTTPClientError):
"""HTTP 410 - Gone.
Indicates that the resource requested is no longer available and will
not be available again.
"""
http_status = http_client.GONE
message = _("Gone")
[docs]
class LengthRequired(HTTPClientError):
"""HTTP 411 - Length Required.
The request did not specify the length of its content, which is
required by the requested resource.
"""
http_status = http_client.LENGTH_REQUIRED
message = _("Length Required")
[docs]
class PreconditionFailed(HTTPClientError):
"""HTTP 412 - Precondition Failed.
The server does not meet one of the preconditions that the requester
put on the request.
"""
http_status = http_client.PRECONDITION_FAILED
message = _("Precondition Failed")
[docs]
class RequestedRangeNotSatisfiable(HTTPClientError):
"""HTTP 416 - Requested Range Not Satisfiable.
The client has asked for a portion of the file, but the server cannot
supply that portion.
"""
http_status = http_client.REQUESTED_RANGE_NOT_SATISFIABLE
message = _("Requested Range Not Satisfiable")
[docs]
class ExpectationFailed(HTTPClientError):
"""HTTP 417 - Expectation Failed.
The server cannot meet the requirements of the Expect request-header field.
"""
http_status = http_client.EXPECTATION_FAILED
message = _("Expectation Failed")
[docs]
class UnprocessableEntity(HTTPClientError):
"""HTTP 422 - Unprocessable Entity.
The request was well-formed but was unable to be followed due to semantic
errors.
"""
http_status = http_client.UNPROCESSABLE_ENTITY
message = _("Unprocessable Entity")
[docs]
class InternalServerError(HttpServerError):
"""HTTP 500 - Internal Server Error.
A generic error message, given when no more specific message is suitable.
"""
http_status = http_client.INTERNAL_SERVER_ERROR
message = _("Internal Server Error")
# NotImplemented is a python keyword.
[docs]
class HttpNotImplemented(HttpServerError):
"""HTTP 501 - Not Implemented.
The server either does not recognize the request method, or it lacks
the ability to fulfill the request.
"""
http_status = http_client.NOT_IMPLEMENTED
message = _("Not Implemented")
[docs]
class BadGateway(HttpServerError):
"""HTTP 502 - Bad Gateway.
The server was acting as a gateway or proxy and received an invalid
response from the upstream server.
"""
http_status = http_client.BAD_GATEWAY
message = _("Bad Gateway")
[docs]
class ServiceUnavailable(HttpServerError):
"""HTTP 503 - Service Unavailable.
The server is currently unavailable.
"""
http_status = http_client.SERVICE_UNAVAILABLE
message = _("Service Unavailable")
[docs]
class GatewayTimeout(HttpServerError):
"""HTTP 504 - Gateway Timeout.
The server was acting as a gateway or proxy and did not receive a timely
response from the upstream server.
"""
http_status = http_client.GATEWAY_TIMEOUT
message = _("Gateway Timeout")
[docs]
class HttpVersionNotSupported(HttpServerError):
"""HTTP 505 - HttpVersion Not Supported.
The server does not support the HTTP protocol version used in the request.
"""
http_status = http_client.HTTP_VERSION_NOT_SUPPORTED
message = _("HTTP Version Not Supported")
# _code_map contains all the classes that have http_status attribute.
_code_map = dict(
(getattr(obj, 'http_status', None), obj)
for name, obj in vars(sys.modules[__name__]).items()
if inspect.isclass(obj) and getattr(obj, 'http_status', False)
)
[docs]
def from_response(response, method, url):
"""Returns an instance of :class:`HttpError` or subclass based on response.
:param response: instance of `requests.Response` class
:param method: HTTP method used for request
:param url: URL used for request
"""
req_id = response.headers.get("x-openstack-request-id")
# NOTE(hdd) true for older versions of nova and cinder
if not req_id:
req_id = response.headers.get("x-compute-request-id")
kwargs = {
"http_status": response.status_code,
"response": response,
"method": method,
"url": url,
"request_id": req_id,
}
if "retry-after" in response.headers:
kwargs["retry_after"] = response.headers["retry-after"]
content_type = response.headers.get("Content-Type", "")
if content_type.startswith("application/json"):
try:
body = response.json()
except ValueError:
pass
else:
if isinstance(body, dict):
error = body.get(list(body)[0])
if isinstance(error, dict):
kwargs["message"] = (error.get("message")
or error.get("faultstring"))
kwargs["details"] = (error.get("details")
or str(body))
elif content_type.startswith("text/"):
kwargs["details"] = getattr(response, 'text', '')
try:
cls = _code_map[response.status_code]
except KeyError:
# 5XX status codes are server errors
if response.status_code >= http_client.INTERNAL_SERVER_ERROR:
cls = HttpServerError
# 4XX status codes are client request errors
elif (http_client.BAD_REQUEST <= response.status_code
< http_client.INTERNAL_SERVER_ERROR):
cls = HTTPClientError
else:
cls = HttpError
return cls(**kwargs)
