OpenStack Orchestration (Heat)
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heat/heat/api/middleware/x_forwarded_for.py

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# -*- encoding: utf-8 -*-
#
# 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.
from oslo.config import cfg
from heat.common import wsgi
x_forwarded_middleware_opts = [
cfg.StrOpt('forward_header_name',
default='X-Forwarded-For',
help="The HTTP header that will be used as remote address.")
]
cfg.CONF.register_opts(x_forwarded_middleware_opts)
class XForwardedForMiddleware(wsgi.Middleware):
"""A middleware that replaces the request hostname with proxy hostname.
"""
def __init__(self, application):
super(XForwardedForMiddleware, self).__init__(application)
def process_request(self, req):
# If 'forward_header_name' header was not found, then do not
# change the host name
req.host = req.headers.get(cfg.CONF.forward_header_name, req.host)