64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
# Copyright 2018 Wind River
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import webob.dec
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import webob.exc
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_service.wsgi import Request
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from dccommon import consts as dccommon_consts
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from dcorch.api.proxy.apps.proxy import Proxy
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from dcorch.api.proxy.common.service import Middleware
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from dcorch.api.proxy.common import utils
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LOG = logging.getLogger(__name__)
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filter_opts = [
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cfg.StrOpt('user_header',
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default=dccommon_consts.USER_HEADER_VALUE,
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help='An application specific header'),
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]
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CONF = cfg.CONF
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CONF.register_opts(filter_opts)
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class ApiFiller(Middleware):
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"""WSGI middleware that filters the API requests from the
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pipeline via an application specific header
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"""
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def __init__(self, app, conf):
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self._default_dispatcher = Proxy()
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self._remote_host, self._remote_port = \
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utils.get_remote_host_port_options(CONF)
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super(ApiFiller, self).__init__(app)
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@webob.dec.wsgify(RequestClass=Request)
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def __call__(self, req):
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if ('HTTP_USER_HEADER' in req.environ and
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req.environ['HTTP_USER_HEADER'] == CONF.user_header):
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utils.set_request_forward_environ(req, self._remote_host,
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self._remote_port)
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LOG.debug("Forward dcorch-engine request to the API service")
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return self._default_dispatcher
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else:
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return self.application
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