39 lines
1.4 KiB
Python
39 lines
1.4 KiB
Python
# 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(object):
|
|
"""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)
|