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# Copyright (c) 2018 Amdocs
#
# 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 json
from keystoneauth1.identity import v2 as keystone_v2
from keystoneauth1.identity import v3 as keystone_v3
from keystoneauth1 import session
import pecan
from pecan import rest
import re
from azure.api_v2.api_definition import utils
from azure.pub import exceptions
from azure.pub.msapi import extsys
OBJ_IN_ARRAY = "(\w+)\[(\d+)\]\.(\w+)"
def _get_vim_auth_session(vim_id, tenant_id):
""" Get the auth session to the given backend VIM """
try:
vim = extsys.get_vim_by_id(vim_id)
except exceptions.VimDriverAzureException as e:
return pecan.abort(500, str(e))
params = {
"auth_url": vim["url"],
"username": vim["userName"],
"password": vim["password"],
}
params["tenant_id"] = tenant_id
if '/v2' in params["auth_url"]:
auth = keystone_v2.Password(**params)
else:
params["user_domain_name"] = vim["domain"]
params["project_domain_name"] = vim["domain"]
if 'tenant_id' in params:
params["project_id"] = params.pop("tenant_id")
if 'tenant_name' in params:
params["project_name"] = params.pop("tenant_name")
if '/v3' not in params["auth_url"]:
params["auth_url"] = params["auth_url"] + "/v3",
auth = keystone_v3.Password(**params)
return session.Session(auth=auth)
def _convert_default_value(default):
return {"None": None, "true": True, "false": False}[default]
def _property_exists(resource, attr, required=False):
if attr not in resource:
if required:
raise Exception("Required field %s is missed in VIM "
"resource %s", (attr, resource))
else:
return False
return True
def _convert_vim_res_to_mc_res(vim_resource, res_properties):
mc_resource = {}
for key in res_properties:
vim_res, attr = res_properties[key]["source"].split('.', 1)
# action = res_properties[key].get("action", "copy")
if re.match(OBJ_IN_ARRAY, attr):
attr, index, sub_attr = re.match(OBJ_IN_ARRAY, attr).groups()
if _property_exists(vim_resource[vim_res], attr):
mc_resource[key] = (
vim_resource[vim_res][attr][int(index)][sub_attr])
else:
if _property_exists(vim_resource[vim_res], attr,
res_properties[key].get("required")):
mc_resource[key] = vim_resource[vim_res][attr]
else:
if "default" in res_properties[key]:
mc_resource[key] = _convert_default_value(
res_properties[key]["default"])
return mc_resource
def _convert_mc_res_to_vim_res(mc_resource, res_properties):
vim_resource = {}
for key in res_properties:
vim_res, attr = res_properties[key]["source"].split('.', 1)
# action = res_properties[key].get("action", "copy")
if re.match(OBJ_IN_ARRAY, attr):
attr, index, sub_attr = re.match(OBJ_IN_ARRAY, attr).groups()
if _property_exists(mc_resource, key):
vim_resource[attr] = vim_resource.get(attr, [])
if vim_resource[attr]:
vim_resource[attr][0].update({sub_attr: mc_resource[key]})
else:
vim_resource[attr].append({sub_attr: mc_resource[key]})
else:
if _property_exists(mc_resource, key,
res_properties[key].get("required")):
vim_resource[attr] = mc_resource[key]
return vim_resource
def _build_api_controller(api_meta):
# Assume that only one path
path, path_meta = api_meta['paths'].items()[0]
# url path is behind third slash. The first is vimid, the second is
# tenantid.
path = path.split("/")[3]
controller_name = path.upper() + "Controller"
delimiter = path_meta["vim_path"].find("/", 1)
service_type = path_meta["vim_path"][1:delimiter]
resource_url = path_meta["vim_path"][delimiter:]
# Assume there is only one resource.
name, resource_meta = api_meta['definitions'].items()[0]
resource_properties = resource_meta['properties']
controller_meta = {}
if "get" in path_meta:
# Add the get method to controller.
@pecan.expose("json")
def _get(self, vim_id, tenant_id, resource_id):
""" General GET """
session = _get_vim_auth_session(vim_id, tenant_id)
service = {'service_type': service_type,
'interface': 'public'}
full_url = resource_url + "/%s" % resource_id
resp = session.get(full_url, endpoint_filter=service)
mc_res = _convert_vim_res_to_mc_res(resp.json(),
resource_properties)
mc_res.update({"vimName": vim_id,
"vimId": vim_id,
"tenantId": tenant_id,
"returnCode": 0})
return mc_res
controller_meta["get"] = _get
if "get_all" in path_meta:
# Add the get_all method to controller.
@pecan.expose("json")
def _get_all(self, vim_id, tenant_id):
""" General GET all """
session = _get_vim_auth_session(vim_id, tenant_id)
service = {'service_type': service_type,
'interface': 'public'}
resp = session.get(resource_url, endpoint_filter=service)
vim_res = resp.json()[resource_meta['plural_vim_resource']]
mc_res = [_convert_vim_res_to_mc_res(
{resource_meta['vim_resource']: v},
resource_properties)
for v in vim_res]
return {"vimName": vim_id,
resource_meta['plural']: mc_res,
"tenantId": tenant_id,
"vimid": vim_id}
controller_meta["get_all"] = _get_all
if "post" in path_meta:
# Add the post method to controller.
@pecan.expose("json")
def _post(self, vim_id, tenant_id):
""" General POST """
session = _get_vim_auth_session(vim_id, tenant_id)
service = {'service_type': service_type,
'interface': 'public'}
vim_res = _convert_mc_res_to_vim_res(pecan.request.json_body,
resource_properties)
req_body = json.JSONEncoder().encode(
{resource_meta['vim_resource']: vim_res})
resp = session.post(resource_url,
data=req_body,
endpoint_filter=service)
mc_res = _convert_vim_res_to_mc_res(resp.json(),
resource_properties)
mc_res.update({"vimName": vim_id,
"vimId": vim_id,
"tenantId": tenant_id,
"returnCode": 0})
return mc_res
controller_meta["post"] = _post
if "delete" in path_meta:
# Add the delete method to controller.
@pecan.expose("json")
def _delete(self, vim_id, tenant_id, resource_id):
""" General DELETE """
session = _get_vim_auth_session(vim_id, tenant_id)
service = {'service_type': service_type,
'interface': 'public'}
full_url = resource_url + "/%s" % resource_id
session.delete(full_url, endpoint_filter=service)
controller_meta["delete"] = _delete
return path, type(controller_name, (rest.RestController,), controller_meta)
def insert_dynamic_controller(root_controller):
api_defs = utils.get_definition_list()
for d in api_defs:
path, con_class = _build_api_controller(d)
setattr(root_controller, path, con_class())
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