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# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T Intellectual Property
#
# 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
import requests
import yaml
from osdf.config.base import creds_prefixes
from osdf.config.base import osdf_config
from osdf.logging.osdf_logging import debug_log
from osdf.logging.osdf_logging import MH
def get_rest_client(request_json, service):
"""Get a RestClient based on request_json's callback URL and osdf_config's credentials based on service name
:param request_json:
:param service: so or cm
:return: rc -- RestClient
"""
callback_url = request_json["requestInfo"]["callbackUrl"]
prefix = creds_prefixes[service]
config = osdf_config.deployment
c_userid, c_passwd = config[prefix + "Username"], config[prefix + "Password"]
return RestClient(url=callback_url, userid=c_userid, passwd=c_passwd)
def json_from_file(file_name):
"""Read a policy from a file"""
with open(file_name) as fid:
return json.load(fid)
def yaml_from_file(file_name):
"""Read a policy from a file"""
with open(file_name) as fid:
return yaml.load(fid)
class RestClient(object):
"""Simple REST Client that supports get/post and basic auth"""
def __init__(self, userid=None, passwd=None, log_func=None, url=None, timeout=None, headers=None,
method="POST", req_id=None, verify=None):
self.auth = (userid, passwd) if userid and passwd else None
self.headers = headers if headers else {}
self.method = method
self.url = url
self.log_func = log_func
self.timeout = (30, 120) if timeout is None else timeout
self.req_id = req_id
self.verify = verify
def add_headers(self, headers):
self.headers.update(headers)
def request(self, url=None, method=None, asjson=True, ok_codes=(2, ),
raw_response=False, noresponse=False, timeout=None, **kwargs):
"""Sends http request to the specified url
:param url: REST end point to query
:param method: GET or POST (default is None => self.method)
:param asjson: whether the expected response is in json format
:param ok_codes: expected codes (prefix matching -- e.g. can be (20, 21, 32) or (2, 3))
:param noresponse: If no response is expected (as long as response codes are OK)
:param raw_response: If we need just the raw response (e.g. conductor sends transaction IDs in headers)
:param timeout: Connection and read timeouts
:param kwargs: Other parameters
:return:
"""
if not self.req_id:
debug_log.debug("Requesting URL: {}".format(url or self.url))
else:
debug_log.debug("Requesting URL: {} for request ID: {}".format(url or self.url, self.req_id))
if not url:
url = self.url
if not self.verify and url.startswith("https"):
verify = osdf_config.deployment["aaf_ca_certs"]
else:
verify = self.verify
res = requests.request(url=url or self.url, method=method or self.method,
auth=self.auth, headers=self.headers,
timeout=timeout or self.timeout, verify=verify, **kwargs)
if self.log_func:
self.log_func(MH.received_http_response(res))
res_code = str(res.status_code)
if not any(res_code.startswith(x) for x in map(str, ok_codes)):
raise BaseException(res.raise_for_status())
if raw_response:
return res
elif noresponse:
return None
elif asjson:
return res.json()
else:
return res.content
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