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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# 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.
"""
RequestContext: context for requests that persist through all of nova.
"""
import datetime
import random
from nova import exception
from nova import utils
class RequestContext(object):
def __init__(self, user, project, is_admin=None, read_deleted=False,
remote_address=None, timestamp=None, request_id=None):
if hasattr(user, 'id'):
self._user = user
self.user_id = user.id
else:
self._user = None
self.user_id = user
if hasattr(project, 'id'):
self._project = project
self.project_id = project.id
else:
self._project = None
self.project_id = project
if is_admin is None:
if self.user_id and self.user:
self.is_admin = self.user.is_admin()
else:
self.is_admin = False
else:
self.is_admin = is_admin
self.read_deleted = read_deleted
self.remote_address = remote_address
if not timestamp:
timestamp = datetime.datetime.utcnow()
if isinstance(timestamp, str) or isinstance(timestamp, unicode):
timestamp = utils.parse_isotime(timestamp)
self.timestamp = timestamp
if not request_id:
request_id = ''.join(
[random.choice('ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-')
for x in xrange(20)]
)
self.request_id = request_id
@property
def user(self):
# NOTE(vish): Delay import of manager, so that we can import this
# file from manager.
from nova.auth import manager
if not self._user:
try:
self._user = manager.AuthManager().get_user(self.user_id)
except exception.NotFound:
pass
return self._user
@property
def project(self):
# NOTE(vish): Delay import of manager, so that we can import this
# file from manager.
from nova.auth import manager
if not self._project:
try:
self._project = manager.AuthManager().get_project(self.project_id)
except exception.NotFound:
pass
return self._project
def to_dict(self):
return {'user': self.user_id,
'project': self.project_id,
'is_admin': self.is_admin,
'read_deleted': self.read_deleted,
'remote_address': self.remote_address,
'timestamp': utils.isotime(self.timestamp),
'request_id': self.request_id}
@classmethod
def from_dict(cls, values):
return cls(**values)
def elevated(self, read_deleted=False):
"""Return a version of this context with admin flag set"""
return RequestContext(self.user_id,
self.project_id,
True,
read_deleted,
self.remote_address,
self.timestamp,
self.request_id)
def get_admin_context(read_deleted=False):
return RequestContext(None, None, True, read_deleted)
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