8a4f61a93d
As mentioned in [1], we should avoid using six.iteritems(iter) to achieve iterators. We can use iter.items() instead, as it will return iterators in PY3 as well. [1] http://lists.openstack.org/pipermail/openstack-dev/2015-June/066391.html Change-Id: Ic41abf2ca6ec3ecb651b980091b52d0a185c9089
443 lines
12 KiB
Python
443 lines
12 KiB
Python
# 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.
|
|
"""
|
|
|
|
import inspect
|
|
import sys
|
|
|
|
|
|
class ClientException(Exception):
|
|
"""The base exception class for all exceptions this library raises.
|
|
"""
|
|
pass
|
|
|
|
|
|
class MissingArgs(ClientException):
|
|
"""Supplied arguments are not sufficient for calling a function."""
|
|
def __init__(self, missing):
|
|
self.missing = missing
|
|
msg = "Missing argument(s): %s" % ", ".join(missing)
|
|
super(MissingArgs, self).__init__(msg)
|
|
|
|
|
|
class ValidationError(ClientException):
|
|
"""Error in validation on API client side."""
|
|
pass
|
|
|
|
|
|
class UnsupportedVersion(ClientException):
|
|
"""User is trying to use an unsupported version of the API."""
|
|
pass
|
|
|
|
|
|
class CommandError(ClientException):
|
|
"""Error in CLI tool."""
|
|
pass
|
|
|
|
|
|
class AuthorizationFailure(ClientException):
|
|
"""Cannot authorize API client."""
|
|
pass
|
|
|
|
|
|
class ConnectionRefused(ClientException):
|
|
"""Cannot connect to API service."""
|
|
pass
|
|
|
|
|
|
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
|
|
|
|
|
|
class AuthSystemNotFound(AuthorizationFailure):
|
|
"""User has specified a AuthSystem that is not installed."""
|
|
def __init__(self, auth_system):
|
|
super(AuthSystemNotFound, self).__init__(
|
|
"AuthSystemNotFound: %s" % repr(auth_system))
|
|
self.auth_system = auth_system
|
|
|
|
|
|
class NoUniqueMatch(ClientException):
|
|
"""Multiple entities found instead of one."""
|
|
pass
|
|
|
|
|
|
class EndpointException(ClientException):
|
|
"""Something is rotten in Service Catalog."""
|
|
pass
|
|
|
|
|
|
class EndpointNotFound(EndpointException):
|
|
"""Could not find requested endpoint in Service Catalog."""
|
|
pass
|
|
|
|
|
|
class AmbiguousEndpoints(EndpointException):
|
|
"""Found more than one matching endpoint in Service Catalog."""
|
|
def __init__(self, endpoints=None):
|
|
super(AmbiguousEndpoints, self).__init__(
|
|
"AmbiguousEndpoints: %s" % repr(endpoints))
|
|
self.endpoints = endpoints
|
|
|
|
|
|
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)
|
|
|
|
|
|
class HTTPClientError(HttpError):
|
|
"""Client-side HTTP error.
|
|
|
|
Exception for cases in which the client seems to have erred.
|
|
"""
|
|
message = "HTTP Client Error"
|
|
|
|
|
|
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"
|
|
|
|
|
|
class BadRequest(HTTPClientError):
|
|
"""HTTP 400 - Bad Request.
|
|
|
|
The request cannot be fulfilled due to bad syntax.
|
|
"""
|
|
http_status = 400
|
|
message = "Bad Request"
|
|
|
|
|
|
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 = 401
|
|
message = "Unauthorized"
|
|
|
|
|
|
class PaymentRequired(HTTPClientError):
|
|
"""HTTP 402 - Payment Required.
|
|
|
|
Reserved for future use.
|
|
"""
|
|
http_status = 402
|
|
message = "Payment Required"
|
|
|
|
|
|
class Forbidden(HTTPClientError):
|
|
"""HTTP 403 - Forbidden.
|
|
|
|
The request was a valid request, but the server is refusing to respond
|
|
to it.
|
|
"""
|
|
http_status = 403
|
|
message = "Forbidden"
|
|
|
|
|
|
class NotFound(HTTPClientError):
|
|
"""HTTP 404 - Not Found.
|
|
|
|
The requested resource could not be found but may be available again
|
|
in the future.
|
|
"""
|
|
http_status = 404
|
|
message = "Not Found"
|
|
|
|
|
|
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 = 405
|
|
message = "Method Not Allowed"
|
|
|
|
|
|
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 = 406
|
|
message = "Not Acceptable"
|
|
|
|
|
|
class ProxyAuthenticationRequired(HTTPClientError):
|
|
"""HTTP 407 - Proxy Authentication Required.
|
|
|
|
The client must first authenticate itself with the proxy.
|
|
"""
|
|
http_status = 407
|
|
message = "Proxy Authentication Required"
|
|
|
|
|
|
class RequestTimeout(HTTPClientError):
|
|
"""HTTP 408 - Request Timeout.
|
|
|
|
The server timed out waiting for the request.
|
|
"""
|
|
http_status = 408
|
|
message = "Request Timeout"
|
|
|
|
|
|
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 = 409
|
|
message = "Conflict"
|
|
|
|
|
|
class Gone(HTTPClientError):
|
|
"""HTTP 410 - Gone.
|
|
|
|
Indicates that the resource requested is no longer available and will
|
|
not be available again.
|
|
"""
|
|
http_status = 410
|
|
message = "Gone"
|
|
|
|
|
|
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 = 411
|
|
message = "Length Required"
|
|
|
|
|
|
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 = 412
|
|
message = "Precondition Failed"
|
|
|
|
|
|
class RequestEntityTooLarge(HTTPClientError):
|
|
"""HTTP 413 - Request Entity Too Large.
|
|
|
|
The request is larger than the server is willing or able to process.
|
|
"""
|
|
http_status = 413
|
|
message = "Request Entity Too Large"
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
try:
|
|
self.retry_after = int(kwargs.pop('retry_after'))
|
|
except (KeyError, ValueError):
|
|
self.retry_after = 0
|
|
|
|
super(RequestEntityTooLarge, self).__init__(*args, **kwargs)
|
|
|
|
|
|
class RequestUriTooLong(HTTPClientError):
|
|
"""HTTP 414 - Request-URI Too Long.
|
|
|
|
The URI provided was too long for the server to process.
|
|
"""
|
|
http_status = 414
|
|
message = "Request-URI Too Long"
|
|
|
|
|
|
class UnsupportedMediaType(HTTPClientError):
|
|
"""HTTP 415 - Unsupported Media Type.
|
|
|
|
The request entity has a media type which the server or resource does
|
|
not support.
|
|
"""
|
|
http_status = 415
|
|
message = "Unsupported Media Type"
|
|
|
|
|
|
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 = 416
|
|
message = "Requested Range Not Satisfiable"
|
|
|
|
|
|
class ExpectationFailed(HTTPClientError):
|
|
"""HTTP 417 - Expectation Failed.
|
|
|
|
The server cannot meet the requirements of the Expect request-header field.
|
|
"""
|
|
http_status = 417
|
|
message = "Expectation Failed"
|
|
|
|
|
|
class UnprocessableEntity(HTTPClientError):
|
|
"""HTTP 422 - Unprocessable Entity.
|
|
|
|
The request was well-formed but was unable to be followed due to semantic
|
|
errors.
|
|
"""
|
|
http_status = 422
|
|
message = "Unprocessable Entity"
|
|
|
|
|
|
class InternalServerError(HttpServerError):
|
|
"""HTTP 500 - Internal Server Error.
|
|
|
|
A generic error message, given when no more specific message is suitable.
|
|
"""
|
|
http_status = 500
|
|
message = "Internal Server Error"
|
|
|
|
|
|
# NotImplemented is a python keyword.
|
|
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 = 501
|
|
message = "Not Implemented"
|
|
|
|
|
|
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 = 502
|
|
message = "Bad Gateway"
|
|
|
|
|
|
class ServiceUnavailable(HttpServerError):
|
|
"""HTTP 503 - Service Unavailable.
|
|
|
|
The server is currently unavailable.
|
|
"""
|
|
http_status = 503
|
|
message = "Service Unavailable"
|
|
|
|
|
|
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 = 504
|
|
message = "Gateway Timeout"
|
|
|
|
|
|
class HttpVersionNotSupported(HttpServerError):
|
|
"""HTTP 505 - HttpVersion Not Supported.
|
|
|
|
The server does not support the HTTP protocol version used in the request.
|
|
"""
|
|
http_status = 505
|
|
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)
|
|
)
|
|
|
|
|
|
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
|
|
"""
|
|
kwargs = {
|
|
"http_status": response.status_code,
|
|
"response": response,
|
|
"method": method,
|
|
"url": url,
|
|
"request_id": response.headers.get("x-compute-request-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 hasattr(body, "keys"):
|
|
error = body[list(body.keys())[0]]
|
|
kwargs["message"] = error.get("message", None)
|
|
kwargs["details"] = error.get("details", None)
|
|
elif content_type.startswith("text/"):
|
|
kwargs["details"] = response.text
|
|
|
|
try:
|
|
cls = _code_map[response.status_code]
|
|
except KeyError:
|
|
if 500 <= response.status_code < 600:
|
|
cls = HttpServerError
|
|
elif 400 <= response.status_code < 500:
|
|
cls = HTTPClientError
|
|
else:
|
|
cls = HttpError
|
|
return cls(**kwargs)
|