lcm/lcm/pub/utils/notificationsutil.py

   1 # Copyright (C) 2018 Verizon. All Rights Reserved
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #         http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 import json
  16 import logging
  17 import requests
  18
  19 from rest_framework import status
  20 from requests.auth import HTTPBasicAuth
  21
  22 from lcm.nf import const
  23 from lcm.pub.database.models import SubscriptionModel
  24
  25 logger = logging.getLogger(__name__)
  26
  27
  28 class NotificationsUtil(object):
  29     def __init__(self):
  30         pass
  31
  32     def send_notification(self, notification):
  33         logger.info("Send Notifications to the callbackUri")
  34         filters = {
  35             "operationState": "operation_states",
  36             "operation": "operation_types"
  37         }
  38         subscriptions_filter = {v + "__contains": notification[k] for k, v in filters.iteritems()}
  39
  40         subscriptions = SubscriptionModel.objects.filter(**subscriptions_filter)
  41         if not subscriptions.exists():
  42             logger.info("No subscriptions created for the filters %s" % notification)
  43             return
  44         logger.info("Start sending notifications")
  45         for subscription in subscriptions:
  46             # set subscription id
  47             notification["subscriptionId"] = subscription.subscription_id
  48             notification['_links']['subscription'] = {'href': '/api/vnflcm/v1/subscriptions/%s' % subscription.subscription_id}
  49             callbackUri = subscription.callback_uri
  50             auth_info = json.loads(subscription.auth_info)
  51             if auth_info["authType"] == const.OAUTH2_CLIENT_CREDENTIALS:
  52                 pass
  53             try:
  54                 self.post_notification(callbackUri, auth_info, notification)
  55             except Exception as e:
  56                 logger.error("Failed to post notification: %s", e.message)
  57
  58     def post_notification(self, callbackUri, auth_info, notification):
  59         params = auth_info.get("paramsBasic", {})
  60         username = params.get("userName")
  61         password = params.get("password")
  62         logger.info("Sending notification to %s", callbackUri)
  63         resp = requests.post(callbackUri, data=notification, auth=HTTPBasicAuth(username, password))
  64         if resp.status_code != status.HTTP_204_NO_CONTENT:
  65             raise Exception("Unable to send the notification to %s, due to %s" % (callbackUri, resp.text))
  66         return