56 lines
2.2 KiB
Python
56 lines
2.2 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_config import cfg
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from oslo_log import log as logging
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from murano.common import wsgi
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ssl_middleware_opts = [
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cfg.StrOpt('secure_proxy_ssl_header',
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default='X-Forwarded-Proto',
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help="The HTTP Header that will be used to determine which "
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"the original request protocol scheme was, even if it was "
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"removed by an SSL terminator proxy.")
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]
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cfg.CONF.register_opts(ssl_middleware_opts)
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LOG = logging.getLogger(__name__)
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class SSLMiddleware(wsgi.Middleware):
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"""Replaces the request wsgi.url_scheme environment
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A middleware that replaces the request wsgi.url_scheme environment
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variable with the value of HTTP header configured in
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secure_proxy_ssl_header if exists in the incoming request.
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This is useful if the server is behind a SSL termination proxy.
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"""
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@classmethod
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def factory(cls, global_conf, **local_conf):
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def filter(app):
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return cls(app)
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return filter
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def __init__(self, application):
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super(SSLMiddleware, self).__init__(application)
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self.secure_proxy_ssl_header = 'HTTP_{0}'.format(
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cfg.CONF.secure_proxy_ssl_header.upper().replace('-', '_'))
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def process_request(self, req):
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url_scheme = req.environ['wsgi.url_scheme']
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req.environ['wsgi.url_scheme'] = req.environ.get(
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self.secure_proxy_ssl_header, req.environ['wsgi.url_scheme'])
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if url_scheme != req.environ['wsgi.url_scheme']:
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LOG.debug('Changed url_scheme from {0} to {1}'.format(
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url_scheme, req.environ['wsgi.url_scheme']))
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