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# Copyright (c) 2017-2018 Lenovo 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 uuid
from django.conf import settings
from onaplogging.mdcContext import MDC
FORWARDED_FOR_FIELDS = ["HTTP_X_FORWARDED_FOR", "HTTP_X_FORWARDED_HOST",
"HTTP_X_FORWARDED_SERVER"]
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 propageted Id from other component. if do not fetch id,
# generate one.
ReqeustID = request.META.get("HTTP_X_TRANSACTIONID", None)
if ReqeustID is None:
ReqeustID = str(uuid.uuid3(uuid.NAMESPACE_URL, settings.MULTIVIM_VERSION))
MDC.put("requestID", ReqeustID)
# generate the reqeust id
InvocationID = str(uuid.uuid4())
MDC.put("invocationID", InvocationID)
MDC.put("serviceName", settings.MULTIVIM_VERSION)
MDC.put("serviceIP", self._getLastIp(request))
return None
def process_response(self, request, response):
MDC.clear()
return response
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