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# Copyright 2019 ZTE Corporation.
#
# 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 json
import logging
import traceback
import uuid
import requests
from django.db.models import Q
from requests.auth import HTTPBasicAuth
from rest_framework import status
import catalog.pub.utils.timeutil
from catalog.packages import const
from catalog.packages.serializers.vnf_pkg_notifications import PkgChangeNotificationSerializer, \
PkgOnboardingNotificationSerializer
from catalog.pub.database.models import VnfPackageModel, VnfPkgSubscriptionModel, NsdmSubscriptionModel
from catalog.pub.utils.values import remove_none_key
logger = logging.getLogger(__name__)
class NotificationsUtil(object):
def __init__(self, notification_type):
self.notification_type = notification_type
self.notifyserializer = None
def prepare_notification(self, **kwargs):
pass
def send_notification(self):
notification = self.prepare_notification()
subscriptions_filter = {v + "__contains": notification[k] for k, v in self.filter.items()}
subscriptions_filter = remove_none_key(subscriptions_filter)
logger.debug('send_notification subscriptions_filter = %s' % subscriptions_filter)
q1 = Q()
q1.connector = 'OR'
for k, v in subscriptions_filter.items():
q1.children.append((k, v))
subscriptions = self.SubscriptionModel.objects.filter(q1)
if not subscriptions.exists():
logger.info("No subscriptions created for the filter %s" % notification)
return
logger.info("Start sending notifications")
for sub in subscriptions:
# set subscription id
notification["subscriptionId"] = sub.get_subscription_id()
notification['_links']['subscription'] = {
'href': '/%s%s' % (self.subscription_root_uri, notification["subscriptionId"])
}
callbackuri = sub.callback_uri
"""
auth_info = json.loads(sub.auth_info)
if auth_info["authType"] == const.OAUTH2_CLIENT_CREDENTIALS:
pass
"""
if self.notifyserializer:
serialized_data = self.notifyserializer(data=notification)
if not serialized_data.is_valid():
logger.error('Notification Data is invalid:%s.' % serialized_data.errors)
if sub.auth_info:
self.post_notification(callbackuri, notification, auth_info=json.loads(sub.auth_info))
else:
self.post_notification(callbackuri, notification)
def post_notification(self, callbackuri, notification, auth_info=None):
try:
if auth_info:
if const.BASIC in auth_info.get("authType", ''):
params = auth_info.get("paramsBasic", {})
username = params.get("userName")
password = params.get("password")
resp = requests.post(callbackuri,
data=json.dumps(notification),
headers={'Connection': 'close',
'content-type': 'application/json',
'accept': 'application/json'},
auth=HTTPBasicAuth(username, password),
verify=False)
elif const.OAUTH2_CLIENT_CREDENTIALS in auth_info.get("authType", ''):
# todo
pass
else:
# todo
pass
else:
resp = requests.post(callbackuri,
data=json.dumps(notification),
headers={'Connection': 'close',
'content-type': 'application/json',
'accept': 'application/json'},
verify=False)
if resp.status_code == status.HTTP_204_NO_CONTENT:
logger.info("Sending notification to %s successfully.", callbackuri)
else:
logger.error("Sending notification to %s failed: %s" % (callbackuri, resp))
except:
logger.error("Post notification failed.")
logger.error(traceback.format_exc())
class PkgNotifications(NotificationsUtil):
def __init__(self, notification_type, vnf_pkg_id, change_type=None, operational_state=None):
super(PkgNotifications, self).__init__(notification_type)
self.filter = {
'vnfdId': 'vnfd_id',
'vnfPkgId': 'vnf_pkg_id'
}
self.vnf_pkg_id = vnf_pkg_id
self.change_type = change_type
self.operational_state = operational_state
self.SubscriptionModel = VnfPkgSubscriptionModel
self.subscription_root_uri = const.VNFPKG_SUBSCRIPTION_ROOT_URI
if self.notification_type == "VnfPackageChangeNotification":
self.notifyserializer = PkgChangeNotificationSerializer
else:
self.notifyserializer = PkgOnboardingNotificationSerializer
def prepare_notification(self):
logger.info('Start to prepare Pkgnotification')
vnf_pkg = VnfPackageModel.objects.filter(vnfPackageId=self.vnf_pkg_id)
vnfd_id = None
if vnf_pkg:
vnfd_id = vnf_pkg[0].vnfdId
notification_content = {
'id': str(uuid.uuid4()), # shall be the same if sent multiple times due to multiple subscriptions.
'notificationType': self.notification_type,
# set 'subscriptionId' after filtering for subscribers
'timeStamp': catalog.pub.utils.timeutil.now_time(),
'vnfPkgId': self.vnf_pkg_id,
'vnfdId': vnfd_id,
'_links': {
'vnfPackage': {
'href': '/%s/vnf_packages/%s' % (const.PKG_URL_PREFIX, self.vnf_pkg_id)
}
}
}
if self.notification_type == "VnfPackageChangeNotification":
notification_content['changeType'] = self.change_type
notification_content['operationalState'] = self.operational_state
return notification_content
class NsdNotifications(NotificationsUtil):
def __init__(self, notification_type, nsd_info_id, nsd_id, failure_details=None, operational_state=None):
super(NsdNotifications, self).__init__(notification_type)
self.filter = {
'nsdInfoId': 'nsdInfoId',
'nsdId': 'nsdId',
}
self.SubscriptionModel = NsdmSubscriptionModel
self.subscription_root_uri = const.NSDM_SUBSCRIPTION_ROOT_URI
self.nsd_info_id = nsd_info_id
self.nsd_id = nsd_id
self.failure_details = failure_details
self.operational_state = operational_state
# todo:
# if self.notification_type == "VnfPackageChangeNotification":
# self.notifyserializer = PkgChangeNotificationSerializer
# else:
# self.notifyserializer = PkgOnboardingNotificationSerializer
def prepare_notification(self):
logger.info('Start to prepare Nsdnotification')
notification_content = {
'id': str(uuid.uuid4()), # shall be the same if sent multiple times due to multiple subscriptions.
'notificationType': self.notification_type,
# set 'subscriptionId' after filtering for subscribers
'timeStamp': catalog.pub.utils.timeutil.now_time(),
'nsdInfoId': self.nsd_info_id,
'nsdId': self.nsd_id,
'_links': {
'nsdInfo': {
'href': '/%s/ns_descriptors/%s' % (
const.NSD_URL_PREFIX, self.nsd_info_id)
}
}
}
if self.notification_type == "NsdOnboardingFailureNotification":
notification_content['onboardingFailureDetails'] = self.failure_details
if self.notification_type == "NsdChangeNotification":
notification_content['nsdOperationalState'] = self.operational_state
return notification_content
class PnfNotifications(NotificationsUtil):
def __init__(self, notification_type, pnfd_info_id, pnfd_id, failure_details=None):
super(PnfNotifications, self).__init__(notification_type)
self.filter = {
'pnfdId': 'pnfdId',
'pnfdInfoIds': 'pnfdInfoIds',
}
self.SubscriptionModel = NsdmSubscriptionModel
self.subscription_root_uri = const.NSDM_SUBSCRIPTION_ROOT_URI
self.pnfd_info_id = pnfd_info_id
self.pnfd_id = pnfd_id
self.failure_details = failure_details
# todo
# if self.notification_type == "VnfPackageChangeNotification":
# self.notifyserializer = PkgChangeNotificationSerializer
# else:
# self.notifyserializer = PkgOnboardingNotificationSerializer
def prepare_notification(self, *args, **kwargs):
logger.info('Start to prepare Pnfnotification')
notification_content = {
'id': str(uuid.uuid4()), # shall be the same if sent multiple times due to multiple subscriptions.
'notificationType': self.notification_type,
# set 'subscriptionId' after filtering for subscribers
'timeStamp': catalog.pub.utils.timeutil.now_time(),
'pnfdInfoIds': self.pnfd_info_id,
'pnfdId': self.pnfd_id,
'_links': {
'pnfdInfo': {
'href': '/%s/pnf_descriptors/%s' % (const.NSD_URL_PREFIX,
self.pnfd_info_id)
}
}
}
if self.notification_type == "PnfdOnboardingFailureNotification":
notification_content['onboardingFailureDetails'] = self.failure_details
return notification_content
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