98 lines
3.1 KiB
Python
98 lines
3.1 KiB
Python
# Copyright 2015 Nexenta Systems, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import json
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import requests
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from oslo_log import log as logging
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from cinder import exception
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from cinder.i18n import _
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from cinder.utils import retry
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LOG = logging.getLogger(__name__)
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TIMEOUT = 60
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class NexentaEdgeJSONProxy(object):
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retry_exc_tuple = (
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requests.exceptions.ConnectionError,
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requests.exceptions.ConnectTimeout
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)
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def __init__(self, protocol, host, port, path, user, password, verify,
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auto=False, method=None, session=None):
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if session:
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self.session = session
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else:
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self.session = requests.Session()
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self.session.auth = (user, password)
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self.session.headers.update({'Content-Type': 'application/json'})
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self.protocol = protocol.lower()
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self.verify = verify
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self.host = host
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self.port = port
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self.path = path
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self.user = user
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self.password = password
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self.auto = auto
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self.method = method
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@property
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def url(self):
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return '%s://%s:%s/%s' % (
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self.protocol, self.host, self.port, self.path)
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def __getattr__(self, name):
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if name in ('get', 'post', 'put', 'delete'):
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return NexentaEdgeJSONProxy(
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self.protocol, self.host, self.port, self.path, self.user,
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self.password, self.verify, self.auto, name, self.session)
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return super(NexentaEdgeJSONProxy, self).__getattr__(name)
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def __hash__(self):
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return self.url.__hash__()
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def __repr__(self):
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return 'HTTP JSON proxy: %s' % self.url
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@retry(retry_exc_tuple, interval=1, retries=6)
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def __call__(self, *args):
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self.path = args[0]
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kwargs = {'timeout': TIMEOUT, 'verify': self.verify}
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data = None
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if len(args) > 1:
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data = json.dumps(args[1])
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kwargs['data'] = data
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LOG.debug('Sending JSON data: %s, method: %s, data: %s',
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self.url, self.method, data)
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func = getattr(self.session, self.method)
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if func:
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req = func(self.url, **kwargs)
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else:
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raise exception.VolumeDriverException(
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message=_('Unsupported method: %s') % self.method)
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rsp = req.json()
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LOG.debug('Got response: %s', rsp)
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if rsp.get('response') is None:
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raise exception.VolumeBackendAPIException(
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data=_('Error response: %s') % rsp)
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return rsp.get('response')
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