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# Copyright (c) 2017-2018 Wind River Systems, Inc.
#
# 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.
import six
import base64
import codecs
import json
import traceback
import sys
import logging
from six.moves import urllib
import httplib2
import uuid
from rest_framework import status
from django.conf import settings
from common.utils import aai_cache
rest_no_auth, rest_oneway_auth, rest_bothway_auth = 0, 1, 2
HTTP_200_OK, HTTP_201_CREATED = '200', '201'
HTTP_204_NO_CONTENT, HTTP_202_ACCEPTED = '204', '202'
status_ok_list = [HTTP_200_OK, HTTP_201_CREATED,
HTTP_204_NO_CONTENT, HTTP_202_ACCEPTED]
HTTP_404_NOTFOUND, HTTP_403_FORBIDDEN = '404', '403'
HTTP_401_UNAUTHORIZED, HTTP_400_BADREQUEST = '401', '400'
MAX_RETRY_TIME = 3
logger = logging.getLogger(__name__)
def _call_req(base_url, user, passwd, auth_type,
resource, method, extra_headers='', content=''):
callid = str(uuid.uuid1())
ret = None
resp_status = None
try:
full_url = _combine_url(base_url, resource)
headers = {
'content-type': 'application/json',
'accept': 'application/json'
}
if extra_headers:
headers.update(extra_headers)
# if user:
# headers['Authorization'] = \
# 'Basic ' + str(codecs.encode('%s:%s' % (user, passwd), "ascii"))
if user:
tmpauthsource = '%s:%s' % (user, passwd)
if six.PY3:
tmpauthsource = tmpauthsource.encode('utf-8')
headers['Authorization'] = 'Basic ' + \
base64.b64encode(tmpauthsource).decode('utf-8')
logger.info("Making rest call with method, uri, header = %s, %s, %s" %
(method.upper(), full_url, headers))
if content:
logger.debug("with content = %s" % content)
ca_certs = None
for retry_times in range(MAX_RETRY_TIME):
http = httplib2.Http(
ca_certs=ca_certs,
disable_ssl_certificate_validation=(auth_type == rest_no_auth))
http.follow_all_redirects = True
try:
resp, resp_content = http.request(full_url,
method=method.upper(),
body=content,
headers=headers)
resp_status, resp_body = \
resp['status'], codecs.decode(
resp_content, 'UTF-8') if resp_content else None
if resp_status in status_ok_list:
ret = [0, resp_body, resp_status]
else:
ret = [1, resp_body, resp_status]
break
except Exception as ex:
if 'httplib.ResponseNotReady' in str(sys.exc_info()):
logger.debug("retry_times=%d", retry_times)
logger.error(traceback.format_exc())
ret = [1, "Unable to connect to %s" % full_url, resp_status]
continue
raise ex
logger.info("Rest call finished with status = %s", resp_status)
logger.debug("with response content = %s" % resp_body)
except urllib.error.URLError as err:
logger.error("status=%s, error message=%s" % (resp_status, str(err)))
ret = [2, str(err), resp_status]
except Exception:
logger.error(traceback.format_exc())
logger.error("[%s]ret=%s" % (callid, str(sys.exc_info())))
if not resp_status:
resp_status = status.HTTP_500_INTERNAL_SERVER_ERROR
ret = [3, str(sys.exc_info()), resp_status]
except:
logger.error(traceback.format_exc())
if not resp_status:
resp_status = status.HTTP_500_INTERNAL_SERVER_ERROR
ret = [4, str(sys.exc_info()), resp_status]
return ret
def req_by_msb(resource, method, content=''):
base_url = "%s://%s:%s/" % (
settings.MSB_SERVICE_PROTOCOL, settings.MSB_SERVICE_ADDR, settings.MSB_SERVICE_PORT)
return _call_req(base_url, "", "", rest_no_auth,
resource, method, "", content)
def req_to_vim(base_url, resource, method, extra_headers='', content=''):
return _call_req(base_url, "", "", rest_no_auth,
resource, method, extra_headers, content)
def req_to_aai(resource, method, content='', appid=settings.MULTICLOUD_APP_ID, nocache=False):
tmp_trasaction_id = '9003' #str(uuid.uuid1())
headers = {
'X-FromAppId': appid,
'X-TransactionId': tmp_trasaction_id,
'content-type': 'application/json',
'accept': 'application/json'
}
# hook to flush cache
if method.upper() in ["PUT", "POST", "PATCH", "DELETE"]:
aai_cache.flush_cache_by_url(resource)
elif method.upper() in ["GET"]:
if not nocache:
content = aai_cache.get_cache_by_url(resource)
# logger.debug("cached resource: %s, %s" % (resource, content))
if content:
return content
else:
# flush possible cached data blindly
aai_cache.flush_cache_by_url(resource)
ret, resp_body, resp_status = _call_req(
settings.AAI_BASE_URL, settings.AAI_USERNAME, settings.AAI_PASSWORD, rest_no_auth,
resource, method, content=json.dumps(content), extra_headers=headers)
if method.upper() in ["GET"] and ret == 0 and not nocache:
# aai_cache.set_cache_by_url(resource, [ret, resp_body, resp_status])
aai_cache.set_cache_by_url(resource, (ret, resp_body, resp_status))
return [ret, resp_body, resp_status]
def _combine_url(base_url, resource):
full_url = None
if not resource:
return base_url
if base_url.endswith('/') and resource.startswith('/'):
full_url = base_url[:-1] + resource
elif base_url.endswith('/') and not resource.startswith('/'):
full_url = base_url + resource
elif not base_url.endswith('/') and resource.startswith('/'):
full_url = base_url + resource
else:
full_url = base_url + '/' + resource
return full_url
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