OpenStack Study: utils.py

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# 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 time

from xml.sax import saxutils

from swift.common.swob import HTTPOk, HTTPNoContent

from swift.common.utils import json, normalize_timestamp

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class FakeAccountBroker(object):

"""

Quacks like an account broker, but doesn't actually do anything. Responds

like an account broker would for a real, empty account with no metadata.

"""

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def get_info(self):

now = normalize_timestamp(time.time())

return {'container_count': 0,

'object_count': 0,

'bytes_used': 0,

'created_at': now,

'put_timestamp': now}

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def list_containers_iter(self, *_, **__):

return []

@property

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def metadata(self):

return {}

def account_listing_response(account, req, response_content_type, broker=None,

limit='', marker='', end_marker='', prefix='',

delimiter=''):

if broker is None:

broker = FakeAccountBroker()

info = broker.get_info()

resp_headers = {

'X-Account-Container-Count': info['container_count'],

'X-Account-Object-Count': info['object_count'],

'X-Account-Bytes-Used': info['bytes_used'],

'X-Timestamp': info['created_at'],

'X-PUT-Timestamp': info['put_timestamp']}

resp_headers.update((key, value)

for key, (value, timestamp) in

broker.metadata.iteritems() if value != '')

account_list = broker.list_containers_iter(limit, marker, end_marker,

prefix, delimiter)

if response_content_type == 'application/json':

data = []

for (name, object_count, bytes_used, is_subdir) in account_list:

if is_subdir:

data.append({'subdir': name})

else:

data.append({'name': name, 'count': object_count,

'bytes': bytes_used})

account_list = json.dumps(data)

elif response_content_type.endswith('/xml'):

output_list = ['',

'' % saxutils.quoteattr(account)]

for (name, object_count, bytes_used, is_subdir) in account_list:

if is_subdir:

output_list.append(

'' % saxutils.quoteattr(name))

else:

item = '%s%s' \

'%s' % \

(saxutils.escape(name), object_count, bytes_used)

output_list.append(item)

output_list.append('')

account_list = '\n'.join(output_list)

else:

if not account_list:

resp = HTTPNoContent(request=req, headers=resp_headers)

resp.content_type = response_content_type

resp.charset = 'utf-8'

return resp

account_list = '\n'.join(r[0] for r in account_list) + '\n'

ret = HTTPOk(body=account_list, request=req, headers=resp_headers)

ret.content_type = response_content_type

ret.charset = 'utf-8'

return ret

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def account_listing_response(account, req, response_content_type, broker=None,

limit='', marker='', end_marker='', prefix='',

delimiter=''):

if broker is None:

broker = FakeAccountBroker()

info = broker.get_info()

resp_headers = {

'X-Account-Container-Count': info['container_count'],

'X-Account-Object-Count': info['object_count'],

'X-Account-Bytes-Used': info['bytes_used'],

'X-Timestamp': info['created_at'],

'X-PUT-Timestamp': info['put_timestamp']}

resp_headers.update((key, value)

for key, (value, timestamp) in

broker.metadata.iteritems() if value != '')

account_list = broker.list_containers_iter(limit, marker, end_marker,

prefix, delimiter)

if response_content_type == 'application/json':

data = []

for (name, object_count, bytes_used, is_subdir) in account_list:

if is_subdir:

data.append({'subdir': name})

else:

data.append({'name': name, 'count': object_count,

'bytes': bytes_used})

account_list = json.dumps(data)

elif response_content_type.endswith('/xml'):

output_list = ['',

'' % saxutils.quoteattr(account)]

for (name, object_count, bytes_used, is_subdir) in account_list:

if is_subdir:

output_list.append(

'' % saxutils.quoteattr(name))

else:

item = '%s%s' \

'%s' % \

(saxutils.escape(name), object_count, bytes_used)

output_list.append(item)

output_list.append('')

account_list = '\n'.join(output_list)

else:

if not account_list:

resp = HTTPNoContent(request=req, headers=resp_headers)

resp.content_type = response_content_type

resp.charset = 'utf-8'

return resp

account_list = '\n'.join(r[0] for r in account_list) + '\n'

ret = HTTPOk(body=account_list, request=req, headers=resp_headers)

ret.content_type = response_content_type

ret.charset = 'utf-8'

return ret