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# ================================================================================
# Copyright (c) 2017-2018 AT&T Intellectual Property. All rights reserved.
# ================================================================================
# 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.
# ============LICENSE_END=========================================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
"""web-server for policy_handler"""
import json
import logging
from datetime import datetime
import cherrypy
from .config import Config
from .deploy_handler import PolicyUpdateMessage
from .onap.audit import Audit
from .policy_matcher import PolicyMatcher
from .policy_receiver import PolicyReceiver
from .policy_rest import PolicyRest
class PolicyWeb(object):
"""run http API of policy-handler on 0.0.0.0:wservice_port - any incoming address"""
HOST_INADDR_ANY = ".".join("0"*4)
logger = logging.getLogger("policy_handler.policy_web")
@staticmethod
def run_forever(audit):
"""run the web-server of the policy-handler forever"""
PolicyWeb.logger.info("policy_handler web-server on port(%d)...", Config.wservice_port)
cherrypy.config.update({"server.socket_host": PolicyWeb.HOST_INADDR_ANY,
"server.socket_port": Config.wservice_port})
cherrypy.tree.mount(_PolicyWeb(), '/')
audit.info("running policy_handler web-server as {0}:{1}".format(
cherrypy.server.socket_host, cherrypy.server.socket_port))
PolicyWeb.logger.info("running policy_handler web-server as %s:%d with config: %s",
cherrypy.server.socket_host, cherrypy.server.socket_port,
json.dumps(cherrypy.config))
cherrypy.engine.start()
class _PolicyWeb(object):
"""REST API of policy-handler"""
@staticmethod
def _get_request_info(request):
"""returns info about the http request"""
return "{0} {1}{2}".format(request.method, request.script_name, request.path_info)
@cherrypy.expose
@cherrypy.popargs('policy_id')
@cherrypy.tools.json_out()
def policy_latest(self, policy_id):
"""retireves the latest policy identified by policy_id"""
req_info = _PolicyWeb._get_request_info(cherrypy.request)
audit = Audit(job_name="get_latest_policy",
req_message=req_info, headers=cherrypy.request.headers)
PolicyWeb.logger.info("%s policy_id=%s headers=%s", \
req_info, policy_id, json.dumps(cherrypy.request.headers))
latest_policy = PolicyRest.get_latest_policy((audit, policy_id, None, None)) or {}
PolicyWeb.logger.info("res %s policy_id=%s latest_policy=%s",
req_info, policy_id, json.dumps(latest_policy))
success, http_status_code, _ = audit.audit_done(result=json.dumps(latest_policy))
if not success:
cherrypy.response.status = http_status_code
return latest_policy
def _get_all_policies_latest(self):
"""retireves all the latest policies on GET /policies_latest"""
req_info = _PolicyWeb._get_request_info(cherrypy.request)
audit = Audit(job_name="get_all_policies_latest",
req_message=req_info, headers=cherrypy.request.headers)
PolicyWeb.logger.info("%s", req_info)
result, policy_update = PolicyMatcher.get_latest_policies(audit)
if policy_update and isinstance(policy_update, PolicyUpdateMessage):
result["policy_update"] = policy_update.get_message()
PolicyWeb.logger.info("result %s: %s", req_info, json.dumps(result))
success, http_status_code, _ = audit.audit_done(result=json.dumps(result))
if not success:
cherrypy.response.status = http_status_code
return result
@cherrypy.expose
@cherrypy.tools.json_out()
@cherrypy.tools.json_in()
def policies_latest(self):
"""
on :GET: retrieves all the latest policies from policy-engine that are deployed
on :POST: expects to receive the params that mimic the /getConfig of policy-engine
and retrieves the matching policies from policy-engine and picks the latest on each policy.
sample request - policies filter
{
"configAttributes": { "key1":"value1" },
"configName": "alex_config_name",
"onapName": "DCAE",
"policyName": "DCAE_alex.Config_alex_.*",
"unique": false
}
sample response
{
"DCAE_alex.Config_alex_priority": {
"policy_body": {
"policyName": "DCAE_alex.Config_alex_priority.3.xml",
"policyConfigMessage": "Config Retrieved! ",
"responseAttributes": {},
"policyConfigStatus": "CONFIG_RETRIEVED",
"type": "JSON",
"matchingConditions": {
"priority": "10",
"key1": "value1",
"ONAPName": "DCAE",
"ConfigName": "alex_config_name"
},
"property": null,
"config": {
"foo": "bar",
"foo_updated": "2018-10-06T16:54:31.696Z"
},
"policyVersion": "3"
},
"policy_id": "DCAE_alex.Config_alex_priority"
}
}
"""
if cherrypy.request.method == "GET":
return self._get_all_policies_latest()
if cherrypy.request.method != "POST":
raise cherrypy.HTTPError(404, "unexpected method {0}".format(cherrypy.request.method))
policy_filter = cherrypy.request.json or {}
str_policy_filter = json.dumps(policy_filter)
req_info = _PolicyWeb._get_request_info(cherrypy.request)
audit = Audit(job_name="get_latest_policies",
req_message="{0}: {1}".format(req_info, str_policy_filter), \
headers=cherrypy.request.headers)
PolicyWeb.logger.info("%s: policy_filter=%s headers=%s", \
req_info, str_policy_filter, json.dumps(cherrypy.request.headers))
result = PolicyRest.get_latest_policies(audit, policy_filter=policy_filter) or {}
PolicyWeb.logger.info("result %s: policy_filter=%s result=%s", \
req_info, str_policy_filter, json.dumps(result))
success, http_status_code, _ = audit.audit_done(result=json.dumps(result))
if not success:
cherrypy.response.status = http_status_code
return result
@cherrypy.expose
@cherrypy.tools.json_out()
def catch_up(self):
"""catch up with all DCAE policies"""
started = str(datetime.utcnow())
req_info = _PolicyWeb._get_request_info(cherrypy.request)
audit = Audit(job_name="catch_up", req_message=req_info, headers=cherrypy.request.headers)
PolicyWeb.logger.info("%s", req_info)
PolicyReceiver.catch_up(audit)
res = {"catch-up requested": started}
PolicyWeb.logger.info("requested %s: %s", req_info, json.dumps(res))
audit.info_requested(started)
return res
@cherrypy.expose
def shutdown(self):
"""Shutdown the policy-handler"""
req_info = _PolicyWeb._get_request_info(cherrypy.request)
audit = Audit(job_name="shutdown", req_message=req_info, headers=cherrypy.request.headers)
PolicyWeb.logger.info("%s: --- stopping REST API of policy-handler ---", req_info)
cherrypy.engine.exit()
PolicyReceiver.shutdown(audit)
PolicyWeb.logger.info("policy_handler health: {0}"
.format(json.dumps(audit.health(full=True))))
PolicyWeb.logger.info("%s: --------- the end -----------", req_info)
res = str(datetime.utcnow())
audit.info_requested(res)
PolicyWeb.logger.info("process_info: %s", json.dumps(audit.process_info()))
return "goodbye! shutdown requested {0}".format(res)
@cherrypy.expose
@cherrypy.tools.json_out()
def healthcheck(self):
"""returns the healthcheck results"""
req_info = _PolicyWeb._get_request_info(cherrypy.request)
audit = Audit(job_name="healthcheck",
req_message=req_info, headers=cherrypy.request.headers)
PolicyWeb.logger.info("%s", req_info)
res = audit.health()
PolicyWeb.logger.info("healthcheck %s: res=%s", req_info, json.dumps(res))
audit.audit_done(result=json.dumps(res))
return res
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