f3708c1d09
This patch does more internationalization for the REST API error messages that don't currently have it to take advantage of the new support added by bp user-locale-api to show error messages in the locale requested by the user through the Accept-Language HTTP header. Partially implements bp user-locale-api Change-Id: I92780b42c125a91ab4916b7a31e4b71d306a89a1
636 lines
29 KiB
Python
636 lines
29 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2012 OpenStack Foundation.
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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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import netaddr
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import webob.exc
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from oslo.config import cfg
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from neutron.api import api_common
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from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api
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from neutron.api.v2 import attributes
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from neutron.api.v2 import resource as wsgi_resource
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from neutron.common import exceptions
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from neutron.openstack.common import log as logging
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from neutron.openstack.common.notifier import api as notifier_api
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from neutron import policy
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from neutron import quota
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LOG = logging.getLogger(__name__)
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FAULT_MAP = {exceptions.NotFound: webob.exc.HTTPNotFound,
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exceptions.Conflict: webob.exc.HTTPConflict,
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exceptions.InUse: webob.exc.HTTPConflict,
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exceptions.BadRequest: webob.exc.HTTPBadRequest,
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exceptions.ServiceUnavailable: webob.exc.HTTPServiceUnavailable,
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exceptions.NotAuthorized: webob.exc.HTTPForbidden,
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netaddr.AddrFormatError: webob.exc.HTTPBadRequest,
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}
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class Controller(object):
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LIST = 'list'
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SHOW = 'show'
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CREATE = 'create'
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UPDATE = 'update'
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DELETE = 'delete'
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def __init__(self, plugin, collection, resource, attr_info,
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allow_bulk=False, member_actions=None, parent=None,
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allow_pagination=False, allow_sorting=False):
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if member_actions is None:
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member_actions = []
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self._plugin = plugin
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self._collection = collection.replace('-', '_')
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self._resource = resource.replace('-', '_')
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self._attr_info = attr_info
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self._allow_bulk = allow_bulk
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self._allow_pagination = allow_pagination
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self._allow_sorting = allow_sorting
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self._native_bulk = self._is_native_bulk_supported()
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self._native_pagination = self._is_native_pagination_supported()
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self._native_sorting = self._is_native_sorting_supported()
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self._policy_attrs = [name for (name, info) in self._attr_info.items()
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if info.get('required_by_policy')]
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self._publisher_id = notifier_api.publisher_id('network')
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self._dhcp_agent_notifier = dhcp_rpc_agent_api.DhcpAgentNotifyAPI()
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self._member_actions = member_actions
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self._primary_key = self._get_primary_key()
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if self._allow_pagination and self._native_pagination:
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# Native pagination need native sorting support
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if not self._native_sorting:
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raise exceptions.Invalid(
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_("Native pagination depend on native sorting")
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)
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if not self._allow_sorting:
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LOG.info(_("Allow sorting is enabled because native "
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"pagination requires native sorting"))
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self._allow_sorting = True
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if parent:
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self._parent_id_name = '%s_id' % parent['member_name']
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parent_part = '_%s' % parent['member_name']
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else:
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self._parent_id_name = None
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parent_part = ''
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self._plugin_handlers = {
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self.LIST: 'get%s_%s' % (parent_part, self._collection),
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self.SHOW: 'get%s_%s' % (parent_part, self._resource)
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}
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for action in [self.CREATE, self.UPDATE, self.DELETE]:
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self._plugin_handlers[action] = '%s%s_%s' % (action, parent_part,
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self._resource)
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def _get_primary_key(self, default_primary_key='id'):
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for key, value in self._attr_info.iteritems():
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if value.get('primary_key', False):
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return key
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return default_primary_key
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def _is_native_bulk_supported(self):
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native_bulk_attr_name = ("_%s__native_bulk_support"
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% self._plugin.__class__.__name__)
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return getattr(self._plugin, native_bulk_attr_name, False)
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def _is_native_pagination_supported(self):
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native_pagination_attr_name = ("_%s__native_pagination_support"
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% self._plugin.__class__.__name__)
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return getattr(self._plugin, native_pagination_attr_name, False)
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def _is_native_sorting_supported(self):
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native_sorting_attr_name = ("_%s__native_sorting_support"
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% self._plugin.__class__.__name__)
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return getattr(self._plugin, native_sorting_attr_name, False)
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def _is_visible(self, context, attr_name, data):
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action = "%s:%s" % (self._plugin_handlers[self.SHOW], attr_name)
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# Optimistically init authz_check to True
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authz_check = True
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try:
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attr = (attributes.RESOURCE_ATTRIBUTE_MAP
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[self._collection].get(attr_name))
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if attr and attr.get('enforce_policy'):
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authz_check = policy.check_if_exists(
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context, action, data)
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except KeyError:
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# The extension was not configured for adding its resources
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# to the global resource attribute map. Policy check should
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# not be performed
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LOG.debug(_("The resource %(resource)s was not found in the "
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"RESOURCE_ATTRIBUTE_MAP; unable to perform authZ "
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"check for attribute %(attr)s"),
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{'resource': self._collection,
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'attr': attr_name})
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except exceptions.PolicyRuleNotFound:
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LOG.debug(_("Policy rule:%(action)s not found. Assuming no "
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"authZ check is defined for %(attr)s"),
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{'action': action,
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'attr': attr_name})
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attr_val = self._attr_info.get(attr_name)
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return attr_val and attr_val['is_visible'] and authz_check
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def _view(self, context, data, fields_to_strip=None):
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# make sure fields_to_strip is iterable
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if not fields_to_strip:
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fields_to_strip = []
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return dict(item for item in data.iteritems()
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if (self._is_visible(context, item[0], data) and
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item[0] not in fields_to_strip))
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def _do_field_list(self, original_fields):
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fields_to_add = None
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# don't do anything if fields were not specified in the request
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if original_fields:
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fields_to_add = [attr for attr in self._policy_attrs
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if attr not in original_fields]
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original_fields.extend(self._policy_attrs)
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return original_fields, fields_to_add
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def __getattr__(self, name):
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if name in self._member_actions:
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def _handle_action(request, id, **kwargs):
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arg_list = [request.context, id]
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# Fetch the resource and verify if the user can access it
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try:
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resource = self._item(request, id, True)
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except exceptions.PolicyNotAuthorized:
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msg = _('The resource could not be found.')
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raise webob.exc.HTTPNotFound(msg)
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body = kwargs.pop('body', None)
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# Explicit comparison with None to distinguish from {}
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if body is not None:
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arg_list.append(body)
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# TODO(salvatore-orlando): bp/make-authz-ortogonal
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# The body of the action request should be included
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# in the info passed to the policy engine
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# It is ok to raise a 403 because accessibility to the
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# object was checked earlier in this method
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policy.enforce(request.context, name, resource)
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return getattr(self._plugin, name)(*arg_list, **kwargs)
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return _handle_action
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else:
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raise AttributeError
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def _get_pagination_helper(self, request):
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if self._allow_pagination and self._native_pagination:
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return api_common.PaginationNativeHelper(request,
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self._primary_key)
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elif self._allow_pagination:
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return api_common.PaginationEmulatedHelper(request,
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self._primary_key)
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return api_common.NoPaginationHelper(request, self._primary_key)
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def _get_sorting_helper(self, request):
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if self._allow_sorting and self._native_sorting:
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return api_common.SortingNativeHelper(request, self._attr_info)
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elif self._allow_sorting:
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return api_common.SortingEmulatedHelper(request, self._attr_info)
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return api_common.NoSortingHelper(request, self._attr_info)
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def _items(self, request, do_authz=False, parent_id=None):
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"""Retrieves and formats a list of elements of the requested entity."""
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# NOTE(salvatore-orlando): The following ensures that fields which
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# are needed for authZ policy validation are not stripped away by the
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# plugin before returning.
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original_fields, fields_to_add = self._do_field_list(
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api_common.list_args(request, 'fields'))
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filters = api_common.get_filters(request, self._attr_info,
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['fields', 'sort_key', 'sort_dir',
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'limit', 'marker', 'page_reverse'])
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kwargs = {'filters': filters,
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'fields': original_fields}
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sorting_helper = self._get_sorting_helper(request)
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pagination_helper = self._get_pagination_helper(request)
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sorting_helper.update_args(kwargs)
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sorting_helper.update_fields(original_fields, fields_to_add)
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pagination_helper.update_args(kwargs)
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pagination_helper.update_fields(original_fields, fields_to_add)
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if parent_id:
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kwargs[self._parent_id_name] = parent_id
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obj_getter = getattr(self._plugin, self._plugin_handlers[self.LIST])
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obj_list = obj_getter(request.context, **kwargs)
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obj_list = sorting_helper.sort(obj_list)
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obj_list = pagination_helper.paginate(obj_list)
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# Check authz
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if do_authz:
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# FIXME(salvatore-orlando): obj_getter might return references to
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# other resources. Must check authZ on them too.
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# Omit items from list that should not be visible
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obj_list = [obj for obj in obj_list
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if policy.check(request.context,
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self._plugin_handlers[self.SHOW],
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obj,
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plugin=self._plugin)]
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collection = {self._collection:
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[self._view(request.context, obj,
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fields_to_strip=fields_to_add)
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for obj in obj_list]}
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pagination_links = pagination_helper.get_links(obj_list)
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if pagination_links:
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collection[self._collection + "_links"] = pagination_links
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return collection
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def _item(self, request, id, do_authz=False, field_list=None,
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parent_id=None):
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"""Retrieves and formats a single element of the requested entity."""
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kwargs = {'fields': field_list}
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action = self._plugin_handlers[self.SHOW]
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if parent_id:
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kwargs[self._parent_id_name] = parent_id
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obj_getter = getattr(self._plugin, action)
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obj = obj_getter(request.context, id, **kwargs)
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# Check authz
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# FIXME(salvatore-orlando): obj_getter might return references to
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# other resources. Must check authZ on them too.
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if do_authz:
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policy.enforce(request.context, action, obj)
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return obj
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def _send_dhcp_notification(self, context, data, methodname):
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if cfg.CONF.dhcp_agent_notification:
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self._dhcp_agent_notifier.notify(context, data, methodname)
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def index(self, request, **kwargs):
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"""Returns a list of the requested entity."""
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parent_id = kwargs.get(self._parent_id_name)
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return self._items(request, True, parent_id)
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def show(self, request, id, **kwargs):
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"""Returns detailed information about the requested entity."""
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try:
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# NOTE(salvatore-orlando): The following ensures that fields
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# which are needed for authZ policy validation are not stripped
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# away by the plugin before returning.
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field_list, added_fields = self._do_field_list(
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api_common.list_args(request, "fields"))
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parent_id = kwargs.get(self._parent_id_name)
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return {self._resource:
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self._view(request.context,
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self._item(request,
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id,
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do_authz=True,
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field_list=field_list,
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parent_id=parent_id),
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fields_to_strip=added_fields)}
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except exceptions.PolicyNotAuthorized:
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# To avoid giving away information, pretend that it
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# doesn't exist
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msg = _('The resource could not be found.')
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raise webob.exc.HTTPNotFound(msg)
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def _emulate_bulk_create(self, obj_creator, request, body, parent_id=None):
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objs = []
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try:
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for item in body[self._collection]:
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kwargs = {self._resource: item}
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if parent_id:
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kwargs[self._parent_id_name] = parent_id
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objs.append(self._view(request.context,
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obj_creator(request.context,
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**kwargs)))
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return objs
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# Note(salvatore-orlando): broad catch as in theory a plugin
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# could raise any kind of exception
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except Exception as ex:
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for obj in objs:
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obj_deleter = getattr(self._plugin,
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self._plugin_handlers[self.DELETE])
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try:
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kwargs = ({self._parent_id_name: parent_id} if parent_id
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else {})
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obj_deleter(request.context, obj['id'], **kwargs)
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except Exception:
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# broad catch as our only purpose is to log the exception
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LOG.exception(_("Unable to undo add for "
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"%(resource)s %(id)s"),
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{'resource': self._resource,
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'id': obj['id']})
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# TODO(salvatore-orlando): The object being processed when the
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# plugin raised might have been created or not in the db.
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# We need a way for ensuring that if it has been created,
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# it is then deleted
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raise ex
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def create(self, request, body=None, **kwargs):
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"""Creates a new instance of the requested entity."""
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parent_id = kwargs.get(self._parent_id_name)
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notifier_api.notify(request.context,
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self._publisher_id,
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self._resource + '.create.start',
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notifier_api.CONF.default_notification_level,
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body)
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body = Controller.prepare_request_body(request.context, body, True,
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self._resource, self._attr_info,
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allow_bulk=self._allow_bulk)
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action = self._plugin_handlers[self.CREATE]
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# Check authz
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if self._collection in body:
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# Have to account for bulk create
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items = body[self._collection]
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deltas = {}
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bulk = True
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else:
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items = [body]
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bulk = False
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for item in items:
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self._validate_network_tenant_ownership(request,
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item[self._resource])
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policy.enforce(request.context,
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action,
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item[self._resource])
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try:
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tenant_id = item[self._resource]['tenant_id']
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count = quota.QUOTAS.count(request.context, self._resource,
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self._plugin, self._collection,
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tenant_id)
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if bulk:
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delta = deltas.get(tenant_id, 0) + 1
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deltas[tenant_id] = delta
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else:
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delta = 1
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kwargs = {self._resource: count + delta}
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except exceptions.QuotaResourceUnknown as e:
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# We don't want to quota this resource
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LOG.debug(e)
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else:
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quota.QUOTAS.limit_check(request.context,
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item[self._resource]['tenant_id'],
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**kwargs)
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def notify(create_result):
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notifier_method = self._resource + '.create.end'
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notifier_api.notify(request.context,
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self._publisher_id,
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notifier_method,
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notifier_api.CONF.default_notification_level,
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create_result)
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self._send_dhcp_notification(request.context,
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create_result,
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notifier_method)
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return create_result
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kwargs = {self._parent_id_name: parent_id} if parent_id else {}
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if self._collection in body and self._native_bulk:
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# plugin does atomic bulk create operations
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obj_creator = getattr(self._plugin, "%s_bulk" % action)
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objs = obj_creator(request.context, body, **kwargs)
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return notify({self._collection: [self._view(request.context, obj)
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for obj in objs]})
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else:
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obj_creator = getattr(self._plugin, action)
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if self._collection in body:
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# Emulate atomic bulk behavior
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objs = self._emulate_bulk_create(obj_creator, request,
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body, parent_id)
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return notify({self._collection: objs})
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else:
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kwargs.update({self._resource: body})
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obj = obj_creator(request.context, **kwargs)
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return notify({self._resource: self._view(request.context,
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obj)})
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def delete(self, request, id, **kwargs):
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"""Deletes the specified entity."""
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notifier_api.notify(request.context,
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self._publisher_id,
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self._resource + '.delete.start',
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notifier_api.CONF.default_notification_level,
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{self._resource + '_id': id})
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action = self._plugin_handlers[self.DELETE]
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# Check authz
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parent_id = kwargs.get(self._parent_id_name)
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obj = self._item(request, id, parent_id=parent_id)
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try:
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policy.enforce(request.context,
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action,
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obj)
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except exceptions.PolicyNotAuthorized:
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# To avoid giving away information, pretend that it
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# doesn't exist
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msg = _('The resource could not be found.')
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raise webob.exc.HTTPNotFound(msg)
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obj_deleter = getattr(self._plugin, action)
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obj_deleter(request.context, id, **kwargs)
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notifier_method = self._resource + '.delete.end'
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notifier_api.notify(request.context,
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self._publisher_id,
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notifier_method,
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notifier_api.CONF.default_notification_level,
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{self._resource + '_id': id})
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result = {self._resource: self._view(request.context, obj)}
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self._send_dhcp_notification(request.context,
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result,
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notifier_method)
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def update(self, request, id, body=None, **kwargs):
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"""Updates the specified entity's attributes."""
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parent_id = kwargs.get(self._parent_id_name)
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try:
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payload = body.copy()
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except AttributeError:
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msg = _("Invalid format: %s") % request.body
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raise exceptions.BadRequest(resource='body', msg=msg)
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payload['id'] = id
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notifier_api.notify(request.context,
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self._publisher_id,
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self._resource + '.update.start',
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notifier_api.CONF.default_notification_level,
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payload)
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body = Controller.prepare_request_body(request.context, body, False,
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self._resource, self._attr_info,
|
|
allow_bulk=self._allow_bulk)
|
|
action = self._plugin_handlers[self.UPDATE]
|
|
# Load object to check authz
|
|
# but pass only attributes in the original body and required
|
|
# by the policy engine to the policy 'brain'
|
|
field_list = [name for (name, value) in self._attr_info.iteritems()
|
|
if (value.get('required_by_policy') or
|
|
value.get('primary_key') or
|
|
'default' not in value)]
|
|
orig_obj = self._item(request, id, field_list=field_list,
|
|
parent_id=parent_id)
|
|
orig_obj.update(body[self._resource])
|
|
try:
|
|
policy.enforce(request.context,
|
|
action,
|
|
orig_obj)
|
|
except exceptions.PolicyNotAuthorized:
|
|
# To avoid giving away information, pretend that it
|
|
# doesn't exist
|
|
msg = _('The resource could not be found.')
|
|
raise webob.exc.HTTPNotFound(msg)
|
|
|
|
obj_updater = getattr(self._plugin, action)
|
|
kwargs = {self._resource: body}
|
|
if parent_id:
|
|
kwargs[self._parent_id_name] = parent_id
|
|
obj = obj_updater(request.context, id, **kwargs)
|
|
result = {self._resource: self._view(request.context, obj)}
|
|
notifier_method = self._resource + '.update.end'
|
|
notifier_api.notify(request.context,
|
|
self._publisher_id,
|
|
notifier_method,
|
|
notifier_api.CONF.default_notification_level,
|
|
result)
|
|
self._send_dhcp_notification(request.context,
|
|
result,
|
|
notifier_method)
|
|
return result
|
|
|
|
@staticmethod
|
|
def _populate_tenant_id(context, res_dict, is_create):
|
|
|
|
if (('tenant_id' in res_dict and
|
|
res_dict['tenant_id'] != context.tenant_id and
|
|
not context.is_admin)):
|
|
msg = _("Specifying 'tenant_id' other than authenticated "
|
|
"tenant in request requires admin privileges")
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
|
|
if is_create and 'tenant_id' not in res_dict:
|
|
if context.tenant_id:
|
|
res_dict['tenant_id'] = context.tenant_id
|
|
else:
|
|
msg = _("Running without keystone AuthN requires "
|
|
" that tenant_id is specified")
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
|
|
@staticmethod
|
|
def prepare_request_body(context, body, is_create, resource, attr_info,
|
|
allow_bulk=False):
|
|
"""Verifies required attributes are in request body.
|
|
|
|
Also checking that an attribute is only specified if it is allowed
|
|
for the given operation (create/update).
|
|
|
|
Attribute with default values are considered to be optional.
|
|
|
|
body argument must be the deserialized body.
|
|
"""
|
|
collection = resource + "s"
|
|
if not body:
|
|
raise webob.exc.HTTPBadRequest(_("Resource body required"))
|
|
|
|
prep_req_body = lambda x: Controller.prepare_request_body(
|
|
context,
|
|
x if resource in x else {resource: x},
|
|
is_create,
|
|
resource,
|
|
attr_info,
|
|
allow_bulk)
|
|
if collection in body:
|
|
if not allow_bulk:
|
|
raise webob.exc.HTTPBadRequest(_("Bulk operation "
|
|
"not supported"))
|
|
bulk_body = [prep_req_body(item) for item in body[collection]]
|
|
if not bulk_body:
|
|
raise webob.exc.HTTPBadRequest(_("Resources required"))
|
|
return {collection: bulk_body}
|
|
|
|
res_dict = body.get(resource)
|
|
if res_dict is None:
|
|
msg = _("Unable to find '%s' in request body") % resource
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
|
|
Controller._populate_tenant_id(context, res_dict, is_create)
|
|
Controller._verify_attributes(res_dict, attr_info)
|
|
|
|
if is_create: # POST
|
|
for attr, attr_vals in attr_info.iteritems():
|
|
if attr_vals['allow_post']:
|
|
if ('default' not in attr_vals and
|
|
attr not in res_dict):
|
|
msg = _("Failed to parse request. Required "
|
|
"attribute '%s' not specified") % attr
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
res_dict[attr] = res_dict.get(attr,
|
|
attr_vals.get('default'))
|
|
else:
|
|
if attr in res_dict:
|
|
msg = _("Attribute '%s' not allowed in POST") % attr
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
else: # PUT
|
|
for attr, attr_vals in attr_info.iteritems():
|
|
if attr in res_dict and not attr_vals['allow_put']:
|
|
msg = _("Cannot update read-only attribute %s") % attr
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
|
|
for attr, attr_vals in attr_info.iteritems():
|
|
if (attr not in res_dict or
|
|
res_dict[attr] is attributes.ATTR_NOT_SPECIFIED):
|
|
continue
|
|
# Convert values if necessary
|
|
if 'convert_to' in attr_vals:
|
|
res_dict[attr] = attr_vals['convert_to'](res_dict[attr])
|
|
# Check that configured values are correct
|
|
if 'validate' not in attr_vals:
|
|
continue
|
|
for rule in attr_vals['validate']:
|
|
res = attributes.validators[rule](res_dict[attr],
|
|
attr_vals['validate'][rule])
|
|
if res:
|
|
msg_dict = dict(attr=attr, reason=res)
|
|
msg = _("Invalid input for %(attr)s. "
|
|
"Reason: %(reason)s.") % msg_dict
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
return body
|
|
|
|
@staticmethod
|
|
def _verify_attributes(res_dict, attr_info):
|
|
extra_keys = set(res_dict.keys()) - set(attr_info.keys())
|
|
if extra_keys:
|
|
msg = _("Unrecognized attribute(s) '%s'") % ', '.join(extra_keys)
|
|
raise webob.exc.HTTPBadRequest(msg)
|
|
|
|
def _validate_network_tenant_ownership(self, request, resource_item):
|
|
# TODO(salvatore-orlando): consider whether this check can be folded
|
|
# in the policy engine
|
|
if self._resource not in ('port', 'subnet'):
|
|
return
|
|
network = self._plugin.get_network(
|
|
request.context,
|
|
resource_item['network_id'])
|
|
# do not perform the check on shared networks
|
|
if network.get('shared'):
|
|
return
|
|
|
|
network_owner = network['tenant_id']
|
|
|
|
if network_owner != resource_item['tenant_id']:
|
|
msg = _("Tenant %(tenant_id)s not allowed to "
|
|
"create %(resource)s on this network")
|
|
raise webob.exc.HTTPForbidden(msg % {
|
|
"tenant_id": resource_item['tenant_id'],
|
|
"resource": self._resource,
|
|
})
|
|
|
|
|
|
def create_resource(collection, resource, plugin, params, allow_bulk=False,
|
|
member_actions=None, parent=None, allow_pagination=False,
|
|
allow_sorting=False):
|
|
controller = Controller(plugin, collection, resource, params, allow_bulk,
|
|
member_actions=member_actions, parent=parent,
|
|
allow_pagination=allow_pagination,
|
|
allow_sorting=allow_sorting)
|
|
|
|
return wsgi_resource.Resource(controller, FAULT_MAP)
|