243 lines
8.7 KiB
Python
243 lines
8.7 KiB
Python
# Copyright 2012 OpenStack Foundation.
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# Copyright 2013 NTT corp.
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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 oslo.config import cfg
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import webob.exc
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from glance.api import policy
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from glance.api.v1 import controller
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from glance.common import exception
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from glance.common import utils
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from glance.common import wsgi
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import glance.openstack.common.log as logging
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import glance.registry.client.v1.api as registry
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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CONF.import_opt('image_member_quota', 'glance.common.config')
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class Controller(controller.BaseController):
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def __init__(self):
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self.policy = policy.Enforcer()
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def _check_can_access_image_members(self, context):
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if context.owner is None and not context.is_admin:
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raise webob.exc.HTTPUnauthorized(_("No authenticated user"))
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def _enforce(self, req, action):
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"""Authorize an action against our policies"""
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try:
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self.policy.enforce(req.context, action, {})
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except exception.Forbidden:
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raise webob.exc.HTTPForbidden()
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def _raise_404_if_image_deleted(self, req, image_id):
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image = self.get_image_meta_or_404(req, image_id)
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if image['status'] == 'deleted':
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msg = _("Image with identifier %s has been deleted.") % image_id
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raise webob.exc.HTTPNotFound(msg)
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def index(self, req, image_id):
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"""
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Return a list of dictionaries indicating the members of the
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image, i.e., those tenants the image is shared with.
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:param req: the Request object coming from the wsgi layer
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:param image_id: The opaque image identifier
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:retval The response body is a mapping of the following form::
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{'members': [
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{'member_id': <MEMBER>,
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'can_share': <SHARE_PERMISSION>, ...}, ...
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]}
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"""
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self._enforce(req, 'get_members')
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self._raise_404_if_image_deleted(req, image_id)
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try:
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members = registry.get_image_members(req.context, image_id)
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except exception.NotFound:
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msg = _("Image with identifier %s not found") % image_id
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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except exception.Forbidden:
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msg = _("Unauthorized image access")
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LOG.debug(msg)
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raise webob.exc.HTTPForbidden(msg)
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return dict(members=members)
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@utils.mutating
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def delete(self, req, image_id, id):
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"""
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Removes a membership from the image.
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"""
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self._check_can_access_image_members(req.context)
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self._enforce(req, 'delete_member')
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self._raise_404_if_image_deleted(req, image_id)
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try:
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registry.delete_member(req.context, image_id, id)
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self._update_store_acls(req, image_id)
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except exception.NotFound as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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except exception.Forbidden as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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return webob.exc.HTTPNoContent()
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def default(self, req, image_id, id, body=None):
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"""This will cover the missing 'show' and 'create' actions"""
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raise webob.exc.HTTPMethodNotAllowed()
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def _enforce_image_member_quota(self, req, attempted):
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if CONF.image_member_quota < 0:
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# If value is negative, allow unlimited number of members
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return
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maximum = CONF.image_member_quota
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if attempted > maximum:
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msg = _("The limit has been exceeded on the number of allowed "
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"image members for this image. Attempted: %(attempted)s, "
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"Maximum: %(maximum)s") % locals()
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raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg,
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request=req)
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@utils.mutating
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def update(self, req, image_id, id, body=None):
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"""
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Adds a membership to the image, or updates an existing one.
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If a body is present, it is a dict with the following format::
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{"member": {
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"can_share": [True|False]
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}}
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If "can_share" is provided, the member's ability to share is
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set accordingly. If it is not provided, existing memberships
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remain unchanged and new memberships default to False.
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"""
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self._check_can_access_image_members(req.context)
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self._enforce(req, 'modify_member')
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self._raise_404_if_image_deleted(req, image_id)
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new_number_of_members = len(registry.get_image_members(req.context,
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image_id)) + 1
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self._enforce_image_member_quota(req, new_number_of_members)
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# Figure out can_share
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can_share = None
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if body and 'member' in body and 'can_share' in body['member']:
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can_share = bool(body['member']['can_share'])
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try:
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registry.add_member(req.context, image_id, id, can_share)
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self._update_store_acls(req, image_id)
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except exception.Invalid as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPBadRequest(explanation=msg)
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except exception.NotFound as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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except exception.Forbidden as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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return webob.exc.HTTPNoContent()
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@utils.mutating
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def update_all(self, req, image_id, body):
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"""
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Replaces the members of the image with those specified in the
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body. The body is a dict with the following format::
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{"memberships": [
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{"member_id": <MEMBER_ID>,
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["can_share": [True|False]]}, ...
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]}
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"""
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self._check_can_access_image_members(req.context)
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self._enforce(req, 'modify_member')
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self._raise_404_if_image_deleted(req, image_id)
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memberships = body.get('memberships')
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if memberships:
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new_number_of_members = len(body['memberships'])
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self._enforce_image_member_quota(req, new_number_of_members)
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try:
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registry.replace_members(req.context, image_id, body)
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self._update_store_acls(req, image_id)
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except exception.Invalid as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPBadRequest(explanation=msg)
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except exception.NotFound as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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except exception.Forbidden as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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return webob.exc.HTTPNoContent()
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def index_shared_images(self, req, id):
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"""
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Retrieves list of image memberships for the given member.
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:param req: the Request object coming from the wsgi layer
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:param id: the opaque member identifier
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:retval The response body is a mapping of the following form::
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{'shared_images': [
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{'image_id': <IMAGE>,
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'can_share': <SHARE_PERMISSION>, ...}, ...
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]}
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"""
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try:
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members = registry.get_member_images(req.context, id)
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except exception.NotFound as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPNotFound(msg)
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except exception.Forbidden as e:
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msg = "%s" % e
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LOG.debug(msg)
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raise webob.exc.HTTPForbidden(msg)
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return dict(shared_images=members)
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def _update_store_acls(self, req, image_id):
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image_meta = self.get_image_meta_or_404(req, image_id)
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location_uri = image_meta.get('location')
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public = image_meta.get('is_public')
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self.update_store_acls(req, image_id, location_uri, public)
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def create_resource():
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"""Image members resource factory method"""
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deserializer = wsgi.JSONRequestDeserializer()
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serializer = wsgi.JSONResponseSerializer()
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return wsgi.Resource(Controller(), deserializer, serializer)
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