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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import six
import webob.exc
from wsme.rest.json import fromjson
from wsme.rest.json import tojson
from glance.api import policy
from glance.api.v2 import metadef_namespaces as namespaces
from glance.api.v2.model.metadef_namespace import Namespace
from glance.api.v2.model.metadef_property_type import PropertyType
from glance.api.v2.model.metadef_property_type import PropertyTypes
from glance.common import exception
from glance.common import utils
from glance.common import wsgi
import glance.db
import glance.gateway
from glance import i18n
import glance.notifier
from glance.openstack.common import jsonutils as json
import glance.openstack.common.log as logging
import glance.schema
LOG = logging.getLogger(__name__)
_LE = i18n._LE
_LI = i18n._LI
class NamespacePropertiesController(object):
def __init__(self, db_api=None, policy_enforcer=None):
self.db_api = db_api or glance.db.get_api()
self.policy = policy_enforcer or policy.Enforcer()
self.gateway = glance.gateway.Gateway(db_api=self.db_api,
policy_enforcer=self.policy)
def _to_dict(self, model_property_type):
# Convert the model PropertyTypes dict to a JSON encoding
db_property_type_dict = dict()
db_property_type_dict['schema'] = tojson(
PropertyType, model_property_type)
db_property_type_dict['name'] = model_property_type.name
return db_property_type_dict
def _to_model(self, db_property_type):
# Convert the persisted json schema to a dict of PropertyTypes
property_type = fromjson(
PropertyType, db_property_type.schema)
property_type.name = db_property_type.name
return property_type
def index(self, req, namespace):
try:
filters = dict()
filters['namespace'] = namespace
prop_repo = self.gateway.get_metadef_property_repo(req.context)
db_properties = prop_repo.list(filters=filters)
property_list = Namespace.to_model_properties(db_properties)
namespace_properties = PropertyTypes()
namespace_properties.properties = property_list
except exception.Forbidden as e:
raise webob.exc.HTTPForbidden(explanation=e.msg)
except exception.NotFound as e:
raise webob.exc.HTTPNotFound(explanation=e.msg)
except Exception as e:
LOG.error(utils.exception_to_str(e))
raise webob.exc.HTTPInternalServerError()
return namespace_properties
def show(self, req, namespace, property_name):
try:
prop_repo = self.gateway.get_metadef_property_repo(req.context)
db_property = prop_repo.get(namespace, property_name)
property = self._to_model(db_property)
except exception.Forbidden as e:
raise webob.exc.HTTPForbidden(explanation=e.msg)
except exception.NotFound as e:
raise webob.exc.HTTPNotFound(explanation=e.msg)
except Exception as e:
LOG.error(utils.exception_to_str(e))
raise webob.exc.HTTPInternalServerError()
return property
def create(self, req, namespace, property_type):
prop_factory = self.gateway.get_metadef_property_factory(req.context)
prop_repo = self.gateway.get_metadef_property_repo(req.context)
try:
new_property_type = prop_factory.new_namespace_property(
namespace=namespace, **self._to_dict(property_type))
prop_repo.add(new_property_type)
except exception.Forbidden as e:
raise webob.exc.HTTPForbidden(explanation=e.msg)
except exception.NotFound as e:
raise webob.exc.HTTPNotFound(explanation=e.msg)
except exception.Duplicate as e:
raise webob.exc.HTTPConflict(explanation=e.msg)
except Exception as e:
LOG.error(utils.exception_to_str(e))
raise webob.exc.HTTPInternalServerError()
return self._to_model(new_property_type)
def update(self, req, namespace, property_name, property_type):
prop_repo = self.gateway.get_metadef_property_repo(req.context)
try:
db_property_type = prop_repo.get(namespace, property_name)
db_property_type.name = property_type.name
db_property_type.schema = (self._to_dict(property_type))['schema']
updated_property_type = prop_repo.save(db_property_type)
except exception.Forbidden as e:
raise webob.exc.HTTPForbidden(explanation=e.msg)
except exception.NotFound as e:
raise webob.exc.HTTPNotFound(explanation=e.msg)
except exception.Duplicate as e:
raise webob.exc.HTTPConflict(explanation=e.msg)
except Exception as e:
LOG.error(utils.exception_to_str(e))
raise webob.exc.HTTPInternalServerError()
return self._to_model(updated_property_type)
def delete(self, req, namespace, property_name):
prop_repo = self.gateway.get_metadef_property_repo(req.context)
try:
property_type = prop_repo.get(namespace, property_name)
property_type.delete()
prop_repo.remove(property_type)
except exception.Forbidden as e:
raise webob.exc.HTTPForbidden(explanation=e.msg)
except exception.NotFound as e:
raise webob.exc.HTTPNotFound(explanation=e.msg)
except Exception as e:
LOG.error(utils.exception_to_str(e))
raise webob.exc.HTTPInternalServerError()
class RequestDeserializer(wsgi.JSONRequestDeserializer):
_disallowed_properties = ['created_at', 'updated_at']
def __init__(self, schema=None):
super(RequestDeserializer, self).__init__()
self.schema = schema or get_schema()
def _get_request_body(self, request):
output = super(RequestDeserializer, self).default(request)
if 'body' not in output:
msg = _('Body expected in request.')
raise webob.exc.HTTPBadRequest(explanation=msg)
return output['body']
@classmethod
def _check_allowed(cls, image):
for key in cls._disallowed_properties:
if key in image:
msg = _("Attribute '%s' is read-only.") % key
raise webob.exc.HTTPForbidden(explanation=msg)
def create(self, request):
body = self._get_request_body(request)
self._check_allowed(body)
try:
self.schema.validate(body)
except exception.InvalidObject as e:
raise webob.exc.HTTPBadRequest(explanation=e.msg)
property_type = fromjson(PropertyType, body)
return dict(property_type=property_type)
def update(self, request):
body = self._get_request_body(request)
self._check_allowed(body)
try:
self.schema.validate(body)
except exception.InvalidObject as e:
raise webob.exc.HTTPBadRequest(explanation=e.msg)
property_type = fromjson(PropertyType, body)
return dict(property_type=property_type)
class ResponseSerializer(wsgi.JSONResponseSerializer):
def __init__(self, schema=None):
super(ResponseSerializer, self).__init__()
self.schema = schema
def show(self, response, result):
property_type_json = tojson(PropertyType, result)
body = json.dumps(property_type_json, ensure_ascii=False)
response.unicode_body = six.text_type(body)
response.content_type = 'application/json'
def index(self, response, result):
property_type_json = tojson(PropertyTypes, result)
body = json.dumps(property_type_json, ensure_ascii=False)
response.unicode_body = six.text_type(body)
response.content_type = 'application/json'
def create(self, response, result):
response.status_int = 201
self.show(response, result)
def update(self, response, result):
response.status_int = 200
self.show(response, result)
def delete(self, response, result):
response.status_int = 204
def _get_base_definitions():
return {
"positiveInteger": {
"type": "integer",
"minimum": 0
},
"positiveIntegerDefault0": {
"allOf": [
{"$ref": "#/definitions/positiveInteger"},
{"default": 0}
]
},
"stringArray": {
"type": "array",
"items": {"type": "string"},
"minItems": 1,
"uniqueItems": True
}
}
def _get_base_properties():
base_def = namespaces.get_schema_definitions()
return base_def['property']['additionalProperties']['properties']
def get_schema():
definitions = _get_base_definitions()
properties = _get_base_properties()
mandatory_attrs = PropertyType.get_mandatory_attrs()
# name is required attribute when use as single property type
mandatory_attrs.append('name')
schema = glance.schema.Schema(
'property',
properties,
required=mandatory_attrs,
definitions=definitions
)
return schema
def get_collection_schema():
namespace_properties_schema = get_schema()
# Property name is a dict key and not a required attribute in
# individual property schema inside property collections
namespace_properties_schema.required.remove('name')
return glance.schema.DictCollectionSchema('properties',
namespace_properties_schema)
def create_resource():
"""NamespaceProperties resource factory method"""
schema = get_schema()
deserializer = RequestDeserializer(schema)
serializer = ResponseSerializer(schema)
controller = NamespacePropertiesController()
return wsgi.Resource(controller, deserializer, serializer)
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