# keystone.server.flask.request_processing.middleware.url_normalize

# Source code for keystone.server.flask.request_processing.middleware.url_normalize

    # 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.

    # Flask Native URL Normalizing Middleware

    class URLNormalizingMiddleware:
        """Middleware filter to handle URL normalization."""

        # NOTE(morgan): This must be a middleware as changing 'PATH_INFO' after
        # the request hits the flask app will not impact routing.

        def __init__(self, app):
            self.app = app

        def __call__(self, environ, start_response):
            """Normalize URLs."""
            # TODO(morgan): evaluate collapsing multiple slashes in this middleware
            # e.g. '/v3//auth/tokens -> /v3/auth/tokens

            # Removes a trailing slashes from the given path, if any.
            if len(environ['PATH_INFO']) > 1 and environ['PATH_INFO'][-1] == '/':
                environ['PATH_INFO'] = environ['PATH_INFO'].rstrip('/')

            # Rewrites path to root if no path is given
            if not environ['PATH_INFO']:
                environ['PATH_INFO'] = '/'

            return self.app(environ, start_response)

this page last updated: 2026-08-17 12:45:24

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