blob: 6b4b72ffe13eb34220f2102081454d7a893462e4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
# 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)
# Pass this along so get_container_info will have the configured
# odds to skip cache
app._pipeline_final_app = app.app._pipeline_final_app
return VersionedWritesMiddleware(app, conf)
return versioning_filter
|
