39700637e3
Uses config options enable_v1_api and enable_v2_api to control which APIs have been deployed. (Thanks markwash for all the help) Fixes bug 1043497 Change-Id: I42dc1d88f94e61b9550c5f114ffc1abad25be7ff
91 lines
3.2 KiB
Python
91 lines
3.2 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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# All Rights Reserved.
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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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"""
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A filter middleware that inspects the requested URI for a version string
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and/or Accept headers and attempts to negotiate an API controller to
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return
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"""
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from glance.api import versions
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from glance.common import wsgi
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import glance.openstack.common.log as logging
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from glance.openstack.common import cfg
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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class VersionNegotiationFilter(wsgi.Middleware):
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def __init__(self, app):
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self.versions_app = versions.Controller()
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super(VersionNegotiationFilter, self).__init__(app)
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def process_request(self, req):
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"""Try to find a version first in the accept header, then the URL"""
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msg = _("Determining version of request: %(method)s %(path)s"
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" Accept: %(accept)s")
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args = {'method': req.method, 'path': req.path, 'accept': req.accept}
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LOG.debug(msg % args)
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# If the request is for /versions, just return the versions container
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#TODO(bcwaldon): deprecate this behavior
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if req.path_info_peek() == "versions":
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return self.versions_app
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accept = str(req.accept)
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if accept.startswith('application/vnd.openstack.images-'):
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LOG.debug(_("Using media-type versioning"))
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token_loc = len('application/vnd.openstack.images-')
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req_version = accept[token_loc:]
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else:
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LOG.debug(_("Using url versioning"))
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# Remove version in url so it doesn't conflict later
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req_version = req.path_info_pop()
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try:
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version = self._match_version_string(req_version)
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except ValueError:
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LOG.debug(_("Unknown version. Returning version choices."))
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return self.versions_app
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req.environ['api.version'] = version
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req.path_info = ''.join(('/v', str(version), req.path_info))
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LOG.debug(_("Matched version: v%d"), version)
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LOG.debug('new uri %s' % req.path_info)
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return None
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def _match_version_string(self, subject):
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"""
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Given a string, tries to match a major and/or
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minor version number.
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:param subject: The string to check
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:returns version found in the subject
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:raises ValueError if no acceptable version could be found
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"""
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if subject in ('v1', 'v1.0', 'v1.1') and CONF.enable_v1_api:
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major_version = 1
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elif subject in ('v2', 'v2.0') and CONF.enable_v2_api:
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major_version = 2
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else:
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raise ValueError()
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return major_version
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