42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
# Copyright (c) 2013 NEC Corporation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Middleware that ensures request ID.
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It ensures to assign request ID for each API request and set it to
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request environment. The request ID is also added to API response.
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"""
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import webob.dec
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from neutron.openstack.common import context
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from neutron.openstack.common.middleware import base
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ENV_REQUEST_ID = 'openstack.request_id'
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HTTP_RESP_HEADER_REQUEST_ID = 'x-openstack-request-id'
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class RequestIdMiddleware(base.Middleware):
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@webob.dec.wsgify
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def __call__(self, req):
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req_id = context.generate_request_id()
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req.environ[ENV_REQUEST_ID] = req_id
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response = req.get_response(self.application)
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if HTTP_RESP_HEADER_REQUEST_ID not in response.headers:
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response.headers.add(HTTP_RESP_HEADER_REQUEST_ID, req_id)
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return response
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