589ac355f3
The *_swift_info functions use in module global dicts to provide a registry mechanism for registering and getting swift info. This is an abnormal pattern and doesn't quite fit into utils. Further we looking at following this pattern for sensitive info to trim in the future. So this patch does some house cleaning and moves this registry to a new module swift.common.registry. And updates all the references to it. For backwards compat we still import the *_swift_info methods into utils for any 3rd party tools or middleware. Change-Id: I71fd7f50d1aafc001d6905438f42de4e58af8421
52 lines
2.1 KiB
Python
52 lines
2.1 KiB
Python
# Copyright (c) 2019 OpenStack Foundation
|
|
#
|
|
# 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.
|
|
"""
|
|
Implements middleware for object versioning which comprises an instance of a
|
|
:class:`~swift.common.middleware.versioned_writes.legacy.
|
|
VersionedWritesMiddleware` combined with an instance of an
|
|
:class:`~swift.common.middleware.versioned_writes.object_versioning.
|
|
ObjectVersioningMiddleware`.
|
|
"""
|
|
from swift.common.middleware.versioned_writes. \
|
|
legacy import CLIENT_VERSIONS_LOC, CLIENT_HISTORY_LOC, \
|
|
VersionedWritesMiddleware
|
|
from swift.common.middleware.versioned_writes. \
|
|
object_versioning import ObjectVersioningMiddleware
|
|
|
|
from swift.common.utils import config_true_value
|
|
from swift.common.registry import register_swift_info, get_swift_info
|
|
|
|
|
|
def filter_factory(global_conf, **local_conf):
|
|
"""Provides a factory function for loading versioning middleware."""
|
|
conf = global_conf.copy()
|
|
conf.update(local_conf)
|
|
if config_true_value(conf.get('allow_versioned_writes')):
|
|
register_swift_info('versioned_writes', allowed_flags=(
|
|
CLIENT_VERSIONS_LOC, CLIENT_HISTORY_LOC))
|
|
|
|
allow_object_versioning = config_true_value(conf.get(
|
|
'allow_object_versioning'))
|
|
if allow_object_versioning:
|
|
register_swift_info('object_versioning')
|
|
|
|
def versioning_filter(app):
|
|
if allow_object_versioning:
|
|
if 'symlink' not in get_swift_info():
|
|
raise ValueError('object versioning requires symlinks')
|
|
app = ObjectVersioningMiddleware(app, conf)
|
|
return VersionedWritesMiddleware(app, conf)
|
|
return versioning_filter
|