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# Copyright (c) 2017-2018 Wind River Systems, Inc.
#
# 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 logging
from django.conf import settings
from django.core.cache import cache
from keystoneauth1.identity import v2 as keystone_v2
from keystoneauth1.identity import v3 as keystone_v3
from keystoneauth1 import session
from common.msapi import extsys
logger = logging.getLogger(__name__)
class VimDriverUtils(object):
@staticmethod
def get_vim_info(vimid):
"""
Retrieve VIM information.
:param vimid: VIM Identifier
:return: VIM information
"""
# TODO: get vim info from local cache firstly later from ESR
return extsys.get_vim_by_id(vimid)
@staticmethod
def delete_vim_info(vimid):
return extsys.delete_vim_by_id(vimid)
@staticmethod
def get_query_part(request):
query = ""
full_path = request.get_full_path()
if '?' in full_path:
_, query = full_path.split('?')
return query
@staticmethod
def get_session(
vim, tenant_id=None, tenant_name=None, auth_state=None):
"""
get session object and optionally preload auth_state
"""
auth = None
params = {
"auth_url": vim["url"],
"username": vim["userName"],
"password": vim["password"],
}
# tenantid takes precedence over tenantname
if tenant_id:
params["tenant_id"] = tenant_id
else:
# input tenant name takes precedence over the default one
# from AAI data store
params["tenant_name"] = (tenant_name if tenant_name
else vim['tenant'])
if '/v2' in params["auth_url"]:
auth = keystone_v2.Password(**params)
else:
params["user_domain_name"] = vim["domain"]
params["project_domain_name"] = vim["domain"]
if 'tenant_id' in params:
params["project_id"] = params.pop("tenant_id")
if 'tenant_name' in params:
params["project_name"] = params.pop("tenant_name")
if '/v3' not in params["auth_url"]:
params["auth_url"] = params["auth_url"] + "/v3",
auth = keystone_v3.Password(**params)
#preload auth_state which was acquired in last requests
if auth_state:
auth.set_auth_state(auth_state)
return session.Session(auth=auth, verify=False)
@staticmethod
def get_auth_state(session_obj):
"""
Retrieve the authorization state
:param session: OpenStack Session object
:return: return a string dump of json object with token and
resp_data of authentication request
"""
auth = session_obj._auth_required(None, 'fetch a token')
if auth:
#trigger the authenticate request
session_obj.get_auth_headers(auth)
# norm_expires = utils.normalize_time(auth.expires)
return auth.get_auth_state()
@staticmethod
def get_token_cache(token):
"""
get auth_state and metadata fromm cache
:param token:
:return:
"""
return cache.get(token), cache.get("meta_%s" % token)
@staticmethod
def update_token_cache(token, auth_state, metadata):
"""
Stores into the cache the auth_state and metadata_catalog
information.
:param token: Base token to be used as an identifier
:param auth_state: Authorization information
:param metadata: Metadata Catalog information
"""
if metadata and not cache.get(token):
cache.set(
token, auth_state, settings.CACHE_EXPIRATION_TIME)
cache.set(
"meta_%s" % token, metadata,
settings.CACHE_EXPIRATION_TIME)
@staticmethod
def _replace_a_key(dict_obj, key_pair, reverse):
old_key = key_pair[1] if reverse else key_pair[0]
new_key = key_pair[0] if reverse else key_pair[1]
old_value = dict_obj.pop(old_key, None)
if old_value:
dict_obj[new_key] = old_value
@staticmethod
def replace_key_by_mapping(dict_obj, mapping, reverse=False):
for k in mapping:
VimDriverUtils._replace_a_key(dict_obj, k, reverse)
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