105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 OpenStack LLC.
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# All Rights Reserved.
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#
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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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import webob.dec
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import webob.exc
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from nova import wsgi
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from nova.api.openstack import common
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class Fault(webob.exc.HTTPException):
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"""An RS API fault response."""
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_fault_names = {
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400: "badRequest",
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401: "unauthorized",
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403: "resizeNotAllowed",
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404: "itemNotFound",
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405: "badMethod",
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409: "inProgress",
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413: "overLimit",
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415: "badMediaType",
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501: "notImplemented",
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503: "serviceUnavailable"}
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def __init__(self, exception):
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"""Create a Fault for the given webob.exc.exception."""
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self.wrapped_exc = exception
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@webob.dec.wsgify(RequestClass=wsgi.Request)
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def __call__(self, req):
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"""Generate a WSGI response based on the exception passed to ctor."""
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# Replace the body with fault details.
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code = self.wrapped_exc.status_int
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fault_name = self._fault_names.get(code, "cloudServersFault")
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fault_data = {
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fault_name: {
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'code': code,
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'message': self.wrapped_exc.explanation}}
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if code == 413:
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retry = self.wrapped_exc.headers['Retry-After']
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fault_data[fault_name]['retryAfter'] = retry
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# 'code' is an attribute on the fault tag itself
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metadata = {'application/xml': {'attributes': {fault_name: 'code'}}}
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default_xmlns = common.XML_NS_V10
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serializer = wsgi.Serializer(metadata, default_xmlns)
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content_type = req.best_match_content_type()
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self.wrapped_exc.body = serializer.serialize(fault_data, content_type)
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self.wrapped_exc.content_type = content_type
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return self.wrapped_exc
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class OverLimitFault(webob.exc.HTTPException):
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"""
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Rate-limited request response.
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"""
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_serialization_metadata = {
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"application/xml": {
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"attributes": {
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"overLimitFault": "code",
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},
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},
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}
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def __init__(self, message, details, retry_time):
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"""
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Initialize new `OverLimitFault` with relevant information.
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"""
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self.wrapped_exc = webob.exc.HTTPForbidden()
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self.content = {
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"overLimitFault": {
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"code": self.wrapped_exc.status_int,
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"message": message,
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"details": details,
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},
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}
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@webob.dec.wsgify(RequestClass=wsgi.Request)
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def __call__(self, request):
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"""
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Return the wrapped exception with a serialized body conforming to our
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error format.
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"""
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serializer = wsgi.Serializer(self._serialization_metadata)
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content_type = request.best_match_content_type()
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content = serializer.serialize(self.content, content_type)
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self.wrapped_exc.body = content
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return self.wrapped_exc
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