48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
# Copyright 2013 IBM Corp
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#
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# Author: Tong Li <litong01@us.ibm.com>
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#
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# 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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class SimpleLogin(object):
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"""Example middleware that demostrates how a login middleware should work.
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In this example, the middleware checks if a request path starts with
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string '/datapoints/', if it does, the request gets pass this
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middleware, otherwise, a 401 response is returned.
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"""
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def __init__(self, app, conf):
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self.app = app
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self.conf = conf
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def __call__(self, environ, start_response):
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# if request starts with /datapoints/, then let it go on.
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# this login middle
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if environ.get('PATH_INFO', '').startswith('/datapoints/'):
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return self.app(environ, start_response)
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# otherwise, send something else, request stops here.
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else:
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status = "401 Unauthorized"
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response_headers = [("content-type", "text/plain")]
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start_response(status, response_headers, "please login first")
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return ['Please log in!']
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def filter_factory(global_conf, **local_conf):
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def login_filter(app):
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return SimpleLogin(app, local_conf)
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return login_filter
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