zaqar/marconi/transport/wsgi/exceptions.py
kgriffs 5f87afafcd Clean up exception handling in the WSGI transport driver.
This patch localizes try...except blocks, DRYs construction of
certain HTTP exceptions, and modifies what types of exceptions
are thrown (in some cases), to be more precise.

I also factored out some input validation code that happened
to be mixed up with all the exception handling.

Implements: blueprint grizzly-debt
Change-Id: I1030308bed1ec55477b176bf022118d53b46b7ff
2013-05-20 10:10:16 -05:00

47 lines
1.6 KiB
Python

# Copyright (c) 2013 Rackspace, Inc.
#
# 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 falcon
class HTTPServiceUnavailable(falcon.HTTPServiceUnavailable):
"""Wraps falcon.HTTPServiceUnavailable with Marconi messaging."""
TITLE = _('Service temporarily unavailable')
DESCRIPTION = ('Please try again in a few seconds.')
def __init__(self, description, retry_after=30):
description = description + ' ' + self.DESCRIPTION
super(HTTPServiceUnavailable, self).__init__(
self.TITLE, description, retry_after)
class HTTPBadRequestBody(falcon.HTTPBadRequest):
"""Wraps falcon.HTTPBadRequest with a contextual title."""
TITLE = _('Invalid request body')
def __init__(self, description):
super(HTTPBadRequestBody, self).__init__(self.TITLE, description)
class HTTPDocumentTypeNotSupported(HTTPBadRequestBody):
"""Wraps HTTPBadRequestBody with a standard description."""
DESCRIPTION = ('Document type not supported.')
def __init__(self):
super(HTTPDocumentTypeNotSupported, self).__init__(self.DESCRIPTION)