+# Copyright (c) 2017-2018 VMware, 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.
+
+
+import uuid
+from onaplogging.mdcContext import MDC
+from multivimbroker.pub.config.config import SERVICE_NAME
+from multivimbroker.pub.config.config import FORWARDED_FOR_FIELDS
+
+
+class LogContextMiddleware(object):
+
+ # the last IP behind multiple proxies, if no exist proxies
+ # get local host ip.
+ def _getLastIp(self, request):
+
+ ip = ""
+ try:
+ for field in FORWARDED_FOR_FIELDS:
+ if field in request.META:
+ if ',' in request.META[field]:
+ parts = request.META[field].split(',')
+ ip = parts[-1].strip().split(":")[0]
+ else:
+ ip = request.META[field].split(":")[0]
+
+ if ip == "":
+ ip = request.META.get("HTTP_HOST").split(":")[0]
+
+ except Exception:
+ pass
+
+ return ip
+
+ def process_request(self, request):
+
+ # Fetch TRANSACTIONID Id and pass to plugin server
+ ReqeustID = request.META.get("HTTP_X_TRANSACTIONID", None)
+ if ReqeustID is None:
+ ReqeustID = uuid.uuid3(uuid.NAMESPACE_URL, SERVICE_NAME)
+ request.META["HTTP_X_TRANSACTIONID"] = ReqeustID
+ MDC.put("requestID", ReqeustID)
+ # generate the unique id
+ InovocationID = uuid.uuid3(uuid.NAMESPACE_DNS, SERVICE_NAME)
+ MDC.put("invocationID", InovocationID)
+ MDC.put("serviceName", SERVICE_NAME)
+ # access ip
+ MDC.put("serviceIP", self._getLastIp(request))
+
+ return None
+
+ def process_response(self, request, response):
+
+ MDC.clear()
+ return response