author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Sun, 06 Sep 2009 23:31:53 +0200 | |
changeset 2864 | 2e0b0af889be |
parent 2273 | e4cb9c53db3e |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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# |
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# Copyright 2007 Google Inc. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain 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, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# |
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"""Control the namespacing system used by various APIs. |
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Each API call can specify an alternate namespace, but the functions |
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here can be used to change the default namespace. The default is set |
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before user code begins executing. |
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""" |
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import os |
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ENV_DEFAULT_NAMESPACE = 'HTTP_X_APPENGINE_DEFAULT_NAMESPACE' |
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ENV_CURRENT_NAMESPACE = '__INTERNAL_CURRENT_NAMESPACE' |
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def set_request_namespace(namespace): |
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"""Set the default namespace to use for future calls, for this request only. |
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Args: |
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namespace: A string naming the new namespace to use. The empty |
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string specifies the root namespace for this app. |
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""" |
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os.environ[ENV_CURRENT_NAMESPACE] = namespace |
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def get_request_namespace(): |
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"""Get the name of the current default namespace. |
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The empty string indicates that the root namespace is the default. |
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""" |
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return os.getenv(ENV_CURRENT_NAMESPACE, '') |
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def _enable_request_namespace(): |
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"""Automatically enable namespace to default for domain. |
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Calling this function will automatically default the namespace to the |
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chosen Google Apps domain for the current request. |
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""" |
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if ENV_CURRENT_NAMESPACE not in os.environ: |
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if ENV_DEFAULT_NAMESPACE in os.environ: |
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os.environ[ENV_CURRENT_NAMESPACE] = os.environ[ENV_DEFAULT_NAMESPACE] |
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else: |
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os.environ[ENV_CURRENT_NAMESPACE] = '' |
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def _add_name_space(request, namespace=None): |
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"""Add a name_space field to a request. |
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Args: |
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request: A protocol buffer supporting the set_name_space() operation. |
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namespace: The name of the namespace part. If None, use the |
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default namespace. |
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""" |
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if namespace is None: |
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request.set_name_space(get_request_namespace()) |
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else: |
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request.set_name_space(namespace) |