89 lines
2.9 KiB
Python
89 lines
2.9 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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from glance.common import context
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from glance.common import exception
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from glance.registry.db import api as db_api
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class RequestContext(context.RequestContext):
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"""
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Stores information about the security context under which the user
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accesses the system, as well as additional request information.
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Also provides tests for image visibility and sharability.
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"""
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def is_image_visible(self, image):
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"""Return True if the image is visible in this context."""
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# Is admin == image visible
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if self.is_admin:
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return True
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# No owner == image visible
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if image.owner is None:
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return True
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# Image is_public == image visible
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if image.is_public:
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return True
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# Perform tests based on whether we have an owner
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if self.owner is not None:
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if self.owner == image.owner:
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return True
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# Figure out if this image is shared with that tenant
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try:
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db_api.image_member_find(self, image.id, self.owner)
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return True
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except exception.NotFound:
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pass
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# Private image
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return False
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def is_image_sharable(self, image, **kwargs):
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"""Return True if the image can be shared to others in this context."""
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# Only allow sharing if we have an owner
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if self.owner is None:
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return False
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# Is admin == image sharable
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if self.is_admin:
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return True
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# If we own the image, we can share it
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if self.owner == image.owner:
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return True
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# Let's get the membership association
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if 'membership' in kwargs:
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membership = kwargs['membership']
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if membership is None:
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# Not shared with us anyway
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return False
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else:
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try:
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membership = db_api.image_member_find(self, image.id,
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self.owner)
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except exception.NotFound:
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# Not shared with us anyway
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return False
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# It's the can_share attribute we're now interested in
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return membership.can_share
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