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# Copyright (c) 2010-2014 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.
from swift.common.utils import public, config_true_value
from swift.common.registry import get_swift_info
from swift.common.middleware.s3api.controllers.base import Controller, \
bucket_operation
from swift.common.middleware.s3api.etree import Element, tostring, \
fromstring, XMLSyntaxError, DocumentInvalid, SubElement
from swift.common.middleware.s3api.s3response import HTTPOk, \
S3NotImplemented, MalformedXML
MAX_PUT_VERSIONING_BODY_SIZE = 10240
class VersioningController(Controller):
"""
Handles the following APIs:
* GET Bucket versioning
* PUT Bucket versioning
Those APIs are logged as VERSIONING operations in the S3 server log.
"""
@public
@bucket_operation
def GET(self, req):
"""
Handles GET Bucket versioning.
"""
sysmeta = req.get_container_info(self.app).get('sysmeta', {})
elem = Element('VersioningConfiguration')
if sysmeta.get('versions-enabled'):
SubElement(elem, 'Status').text = (
'Enabled' if config_true_value(sysmeta['versions-enabled'])
else 'Suspended')
body = tostring(elem)
return HTTPOk(body=body, content_type=None)
@public
@bucket_operation
def PUT(self, req):
"""
Handles PUT Bucket versioning.
"""
if 'object_versioning' not in get_swift_info():
raise S3NotImplemented()
xml = req.xml(MAX_PUT_VERSIONING_BODY_SIZE)
try:
elem = fromstring(xml, 'VersioningConfiguration')
status = elem.find('./Status').text
except (XMLSyntaxError, DocumentInvalid):
raise MalformedXML()
except Exception as e:
self.logger.error(e)
raise
if status not in ['Enabled', 'Suspended']:
raise MalformedXML()
# Set up versioning
# NB: object_versioning responsible for ensuring its container exists
req.headers['X-Versions-Enabled'] = str(status == 'Enabled').lower()
req.get_response(self.app, 'POST')
return HTTPOk()
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