55 lines
2.3 KiB
Python
55 lines
2.3 KiB
Python
# 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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"""Handler for the root of the Placement API."""
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from oslo_serialization import jsonutils
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from oslo_utils import encodeutils
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from oslo_utils import timeutils
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from nova.api.openstack.placement import microversion
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from nova.api.openstack.placement import wsgi_wrapper
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@wsgi_wrapper.PlacementWsgify
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def home(req):
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want_version = req.environ[microversion.MICROVERSION_ENVIRON]
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min_version = microversion.min_version_string()
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max_version = microversion.max_version_string()
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# NOTE(cdent): As sections of the api are added, links can be
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# added to this output to align with the guidelines at
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# http://specs.openstack.org/openstack/api-wg/guidelines/microversion_specification.html#version-discovery
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version_data = {
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'id': 'v%s' % min_version,
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'max_version': max_version,
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'min_version': min_version,
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# for now there is only ever one version, so it must be CURRENT
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'status': 'CURRENT',
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'links': [{
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# Point back to this same URL as the root of this version.
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# NOTE(cdent): We explicitly want this to be a relative-URL
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# representation of "this same URL", otherwise placement needs
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# to keep track of proxy addresses and the like, which we have
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# avoided thus far, in order to construct full URLs. Placement
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# is much easier to scale if we never track that stuff.
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'rel': 'self',
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'href': '',
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}],
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}
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version_json = jsonutils.dumps({'versions': [version_data]})
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req.response.body = encodeutils.to_utf8(version_json)
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req.response.content_type = 'application/json'
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if want_version.matches((1, 15)):
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req.response.cache_control = 'no-cache'
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req.response.last_modified = timeutils.utcnow(with_timezone=True)
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return req.response
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