48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
# 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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from oslo_log import log as logging
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from oslo_middleware import base
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import webob
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import constants as cons
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LOG = logging.getLogger(__name__)
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class RequestSource(base.ConfigurableMiddleware):
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"""RequestSource Middleware
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This middleware distinguishes the source of the requests. It can find out
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which request is from central Neutron and which is from local Neutron.
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This middleware updates the context to put the source of requests
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extracted from headers.
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In order to make RequestSource Middleware work, this middleware should
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place after keystoneContext(in etc/neutron/api-paste.ini).
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"""
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def distinguish_requests_source(self, req):
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source_header = req.headers.get(cons.USER_AGENT, "")
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if source_header in cons.REQUEST_SOURCE_TYPE:
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ctx = req.environ['neutron.context']
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ctx.USER_AGENT = source_header
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req.environ['neutron.context'] = ctx
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@webob.dec.wsgify
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def __call__(self, req):
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self.distinguish_requests_source(req)
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response = req.get_response(self.application)
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return response
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