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