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79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
# Copyright 2014 Google Inc. All Rights Reserved.
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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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"""Caching utility for the discovery document."""
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from __future__ import absolute_import
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import logging
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import os
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LOGGER = logging.getLogger(__name__)
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DISCOVERY_DOC_MAX_AGE = 60 * 60 * 24 # 1 day
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DISCOVERY_DOC_DIR = os.path.join(
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os.path.dirname(os.path.realpath(__file__)), "documents"
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)
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def autodetect():
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"""Detects an appropriate cache module and returns it.
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Returns:
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googleapiclient.discovery_cache.base.Cache, a cache object which
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is auto detected, or None if no cache object is available.
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"""
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if "GAE_ENV" in os.environ:
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try:
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from . import appengine_memcache
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return appengine_memcache.cache
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except Exception:
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pass
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try:
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from . import file_cache
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return file_cache.cache
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except Exception:
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LOGGER.info(
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"file_cache is only supported with oauth2client<4.0.0", exc_info=False
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)
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return None
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def get_static_doc(serviceName, version):
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"""Retrieves the discovery document from the directory defined in
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DISCOVERY_DOC_DIR corresponding to the serviceName and version provided.
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Args:
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serviceName: string, name of the service.
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version: string, the version of the service.
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Returns:
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A string containing the contents of the JSON discovery document,
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otherwise None if the JSON discovery document was not found.
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"""
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content = None
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doc_name = "{}.{}.json".format(serviceName, version)
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try:
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with open(os.path.join(DISCOVERY_DOC_DIR, doc_name), "r") as f:
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content = f.read()
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except FileNotFoundError:
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# File does not exist. Nothing to do here.
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pass
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return content
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