69653318f4
The old oslo-incubator log module isn't maintained (and doesn't even exist anymore), so we don't really want to be using it. It appears this was the only incubator module we were actually using, so this allows us to remove all of the unmaintained incubator code. Change-Id: Ib4ad3b231360987a1ef4f95b5b5a8b656232efc4
97 lines
2.9 KiB
Python
97 lines
2.9 KiB
Python
# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
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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
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# 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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import calendar
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import json
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import time
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from oslo_config import cfg
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from oslo_log import log
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from os_collect_config import common
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from os_collect_config import exc
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from os_collect_config import merger
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CONF = cfg.CONF
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logger = log.getLogger(__name__)
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opts = [
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cfg.StrOpt('metadata-url',
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help='URL to query for metadata'),
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]
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name = 'request'
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class Collector(object):
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def __init__(self, requests_impl=common.requests):
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self._requests_impl = requests_impl
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self._session = requests_impl.Session()
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self.last_modified = None
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def check_fetch_content(self, headers):
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'''Raises RequestMetadataNotAvailable if metadata should not be
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fetched.
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'''
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# no last-modified header, so fetch
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lm = headers.get('last-modified')
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if not lm:
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return
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last_modified = calendar.timegm(
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time.strptime(lm, '%a, %d %b %Y %H:%M:%S %Z'))
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# first run, so fetch
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if not self.last_modified:
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return last_modified
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if last_modified < self.last_modified:
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logger.warn(
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'Last-Modified is older than previous collection')
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if last_modified <= self.last_modified:
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raise exc.RequestMetadataNotAvailable
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return last_modified
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def collect(self):
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if CONF.request.metadata_url is None:
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logger.info('No metadata_url configured.')
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raise exc.RequestMetadataNotConfigured
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url = CONF.request.metadata_url
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final_content = {}
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try:
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head = self._session.head(url)
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last_modified = self.check_fetch_content(head.headers)
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content = self._session.get(url)
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content.raise_for_status()
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self.last_modified = last_modified
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except self._requests_impl.exceptions.RequestException as e:
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logger.warn(e)
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raise exc.RequestMetadataNotAvailable
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try:
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value = json.loads(content.text)
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except ValueError as e:
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logger.warn(
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'Failed to parse as json. (%s)' % e)
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raise exc.RequestMetadataNotAvailable
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final_content.update(value)
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final_list = merger.merged_list_from_content(
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final_content, cfg.CONF.deployment_key, name)
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return final_list
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