5e2a56917b
EntityNotFound exception is the base class for the exceptions SnapshotNotFound and ResourceNotFound. so this patch, remove the entris for these exceptions as it will be taken care by EntityNotFound. Change-Id: I824dc35ef358f0c7e8c344fa09740eebf7d09966
164 lines
6.0 KiB
Python
164 lines
6.0 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright © 2013 Unitedstack Inc.
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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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"""A middleware that turns exceptions into parsable string.
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Inspired by Cinder's faultwrapper.
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"""
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import six
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import sys
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import traceback
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from oslo_config import cfg
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import webob
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from heat.common import exception
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from heat.common import serializers
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from heat.common import wsgi
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class Fault(object):
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def __init__(self, error):
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self.error = error
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@webob.dec.wsgify(RequestClass=wsgi.Request)
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def __call__(self, req):
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if req.content_type == 'application/xml':
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serializer = serializers.XMLResponseSerializer()
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else:
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serializer = serializers.JSONResponseSerializer()
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resp = webob.Response(request=req)
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default_webob_exc = webob.exc.HTTPInternalServerError()
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resp.status_code = self.error.get('code', default_webob_exc.code)
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serializer.default(resp, self.error)
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return resp
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class FaultWrapper(wsgi.Middleware):
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"""Replace error body with something the client can parse."""
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error_map = {
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'AttributeError': webob.exc.HTTPBadRequest,
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'ActionInProgress': webob.exc.HTTPConflict,
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'ValueError': webob.exc.HTTPBadRequest,
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'EntityNotFound': webob.exc.HTTPNotFound,
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'NotFound': webob.exc.HTTPNotFound,
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'ResourceActionNotSupported': webob.exc.HTTPBadRequest,
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'InvalidGlobalResource': webob.exc.HTTPInternalServerError,
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'ResourceNotAvailable': webob.exc.HTTPNotFound,
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'PhysicalResourceNameAmbiguity': webob.exc.HTTPBadRequest,
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'InvalidTenant': webob.exc.HTTPForbidden,
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'Forbidden': webob.exc.HTTPForbidden,
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'StackExists': webob.exc.HTTPConflict,
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'StackValidationFailed': webob.exc.HTTPBadRequest,
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'InvalidSchemaError': webob.exc.HTTPBadRequest,
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'InvalidTemplateReference': webob.exc.HTTPBadRequest,
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'InvalidTemplateVersion': webob.exc.HTTPBadRequest,
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'InvalidTemplateSection': webob.exc.HTTPBadRequest,
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'UnknownUserParameter': webob.exc.HTTPBadRequest,
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'RevertFailed': webob.exc.HTTPInternalServerError,
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'StopActionFailed': webob.exc.HTTPInternalServerError,
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'EventSendFailed': webob.exc.HTTPInternalServerError,
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'ServerBuildFailed': webob.exc.HTTPInternalServerError,
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'NotSupported': webob.exc.HTTPBadRequest,
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'MissingCredentialError': webob.exc.HTTPBadRequest,
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'UserParameterMissing': webob.exc.HTTPBadRequest,
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'RequestLimitExceeded': webob.exc.HTTPBadRequest,
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'InvalidTemplateParameter': webob.exc.HTTPBadRequest,
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'Invalid': webob.exc.HTTPBadRequest,
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'ResourcePropertyConflict': webob.exc.HTTPBadRequest,
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'PropertyUnspecifiedError': webob.exc.HTTPBadRequest,
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'ObjectFieldInvalid': webob.exc.HTTPBadRequest,
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'ReadOnlyFieldError': webob.exc.HTTPBadRequest,
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'ObjectActionError': webob.exc.HTTPBadRequest,
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'IncompatibleObjectVersion': webob.exc.HTTPBadRequest,
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'OrphanedObjectError': webob.exc.HTTPBadRequest,
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'UnsupportedObjectError': webob.exc.HTTPBadRequest,
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'ResourceTypeUnavailable': webob.exc.HTTPBadRequest,
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'InvalidBreakPointHook': webob.exc.HTTPBadRequest,
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}
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def _map_exception_to_error(self, class_exception):
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if class_exception == Exception:
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return webob.exc.HTTPInternalServerError
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if class_exception.__name__ not in self.error_map:
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return self._map_exception_to_error(class_exception.__base__)
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return self.error_map[class_exception.__name__]
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def _error(self, ex):
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trace = None
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traceback_marker = 'Traceback (most recent call last)'
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webob_exc = None
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if isinstance(ex, exception.HTTPExceptionDisguise):
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# An HTTP exception was disguised so it could make it here
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# let's remove the disguise and set the original HTTP exception
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if cfg.CONF.debug:
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trace = ''.join(traceback.format_tb(ex.tb))
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ex = ex.exc
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webob_exc = ex
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ex_type = ex.__class__.__name__
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is_remote = ex_type.endswith('_Remote')
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if is_remote:
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ex_type = ex_type[:-len('_Remote')]
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full_message = six.text_type(ex)
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if '\n' in full_message and is_remote:
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message, msg_trace = full_message.split('\n', 1)
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elif traceback_marker in full_message:
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message, msg_trace = full_message.split(traceback_marker, 1)
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message = message.rstrip('\n')
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msg_trace = traceback_marker + msg_trace
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else:
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msg_trace = 'None\n'
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if sys.exc_info() != (None, None, None):
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msg_trace = traceback.format_exc()
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message = full_message
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if isinstance(ex, exception.HeatException):
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message = ex.message
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if cfg.CONF.debug and not trace:
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trace = msg_trace
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if not webob_exc:
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webob_exc = self._map_exception_to_error(ex.__class__)
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error = {
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'code': webob_exc.code,
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'title': webob_exc.title,
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'explanation': webob_exc.explanation,
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'error': {
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'message': message,
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'type': ex_type,
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'traceback': trace,
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}
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}
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return error
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def process_request(self, req):
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try:
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return req.get_response(self.application)
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except Exception as exc:
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return req.get_response(Fault(self._error(exc)))
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