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##############################################################################
# Copyright 2018 EuropeanSoftwareMarketingLtd.
# ===================================================================
# Licensed under the ApacheLicense, Version2.0 (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
#
# 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
##############################################################################
from __future__ import absolute_import
import copy
import logging
import time
import os
import yaml
from vnftest.common import constants as consts, utils
from vnftest.common import rest_client
from vnftest.common.utils import dotdict
from vnftest.common.exceptions import MandatoryKeyException, InputParameterMissing
from vnftest.crawlers.base import Crawler
from vnftest.steps import base
import jinja2
import jinja2.meta
LOG = logging.getLogger(__name__)
class RestCall(base.Step):
"""Call REST API
"""
__step_type__ = "RestCall"
def __init__(self, step_cfg, context, input_params):
self.step_cfg = step_cfg
self.context = context
self.input_params = input_params
self.input_cfg = None
self.output_cfg = None
self.rest_def_file = None
self.delay = None
self.setup_done = False
def setup(self):
options = self.step_cfg['options']
self.rest_def_file = options.get("file")
self.delay = options.get("delay", 0)
self.input_cfg = options.get("input", {})
self.output_cfg = options.get("output", {})
self.sla_cfg = self.step_cfg.get('sla', {'retries': 0})
context_dict = {}
context_dict['creds'] = dotdict(self.context.creds)
context_dict['vnf_descriptor'] = dotdict(self.context.vnf_descriptor)
self.input_params['context'] = dotdict(context_dict)
self.setup_done = True
def eval_input(self, params):
for input_parameter in self.input_cfg:
param_name = input_parameter['parameter_name']
value = None
if 'value' in input_parameter:
value_def = input_parameter['value']
value = utils.format(value_def, self.input_params)
if value is None or value == "":
raise InputParameterMissing(param_name=param_name, source="task configuration")
params[param_name] = value
def run(self, result, attempt=0):
LOG.info("** Handling: " + str(self.rest_def_file))
output = self.run_impl(result)
try:
self.handle_sla(output)
except AssertionError as e:
LOG.info(str(e))
if attempt < self.sla_cfg['retries']:
time.sleep(self.sla_cfg['interval'])
LOG.info("retry operation")
attempt = attempt + 1
return self.run(result, attempt)
else:
raise e
return output
def run_impl(self, result):
if not self.setup_done:
self.setup()
params = copy.deepcopy(self.context.onap_env_config)
self.eval_input(params)
execution_result = self.execute_operation(params)
result_body = execution_result['body']
output = Crawler.crawl(result_body, self.output_cfg)
result.update(output)
return output
def execute_operation(self, params, attempt=0):
if self.delay > 0:
time.sleep(self.delay)
try:
return self.execute_operation_impl(params)
except Exception as e:
LOG.info(str(e))
if attempt < 3:
time.sleep(15)
LOG.info("############# retry operation ##########")
attempt = attempt + 1
return self.execute_operation(params, attempt)
else:
raise e
def execute_operation_impl(self, params):
operation = self.load_file(params)
url = operation['url']
headers = operation.get('headers', {}) or {}
body = operation.get('body', {}) or {}
LOG.info(url)
LOG.info(headers)
LOG.info(body)
if 'file' in operation:
file_path = operation['file']
LOG.info(file_path)
files = {'upload': open(file_path)}
result = rest_client.upload_file(url, headers, files, LOG)
else:
result = rest_client.call(url,
operation['method'],
headers,
body,
LOG)
if result['return_code'] >= 300:
raise RuntimeError(
"Operation failed. return_code:{}, message:{}".format(result['return_code'], result['body']))
LOG.info("Results: " + str(result))
return result
def handle_sla(self, output):
if self.sla_cfg.get('action', "") == 'assert' and 'equals' in self.sla_cfg:
value_def = self.sla_cfg['value']
value = utils.format(value_def, output)
expected_value = self.sla_cfg['equals']
assert value == expected_value
def load_file(self, params):
operation_template = utils.resource_as_string(self.rest_def_file)
operation = jinja2.Template(operation_template).render(**params)
return yaml.load(operation)
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