794 lines
30 KiB
Python
794 lines
30 KiB
Python
# Copyright 2010 Jacob Kaplan-Moss
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# Copyright 2011 OpenStack Foundation
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# Copyright 2011 Piston Cloud Computing, 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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"""
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OpenStack Client interface. Handles the REST calls and responses.
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"""
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import copy
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import errno
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import functools
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import glob
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import hashlib
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import logging
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import os
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import re
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import socket
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import time
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from keystoneclient import adapter
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from oslo.utils import importutils
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from oslo.utils import netutils
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import requests
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from requests import adapters
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try:
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import json
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except ImportError:
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import simplejson as json
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from six.moves.urllib import parse
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from novaclient import exceptions
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from novaclient.i18n import _
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from novaclient.openstack.common import cliutils
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from novaclient import service_catalog
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class TCPKeepAliveAdapter(adapters.HTTPAdapter):
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"""The custom adapter used to set TCP Keep-Alive on all connections."""
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def init_poolmanager(self, *args, **kwargs):
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if requests.__version__ >= '2.4.1':
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kwargs.setdefault('socket_options', [
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(socket.IPROTO_TCP, socket.TCP_NODELAY, 1),
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(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
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])
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super(TCPKeepAliveAdapter, self).init_poolmanager(*args, **kwargs)
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class _ClientConnectionPool(object):
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def __init__(self):
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self._adapters = {}
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def get(self, url):
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"""
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Store and reuse HTTP adapters per Service URL.
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"""
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if url not in self._adapters:
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self._adapters[url] = TCPKeepAliveAdapter()
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return self._adapters[url]
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class CompletionCache(object):
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"""The completion cache is how we support tab-completion with novaclient.
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The `Manager` writes object IDs and Human-IDs to the completion-cache on
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object-show, object-list, and object-create calls.
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The `nova.bash_completion` script then uses these files to provide the
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actual tab-completion.
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The cache directory layout is:
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~/.novaclient/
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<hash-of-endpoint-and-username>/
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<resource>-id-cache
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<resource>-human-id-cache
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"""
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def __init__(self, username, auth_url, attributes=('id', 'human_id')):
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self.directory = self._make_directory_name(username, auth_url)
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self.attributes = attributes
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def _make_directory_name(self, username, auth_url):
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"""Creates a unique directory name based on the auth_url and username
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of the current user.
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"""
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uniqifier = hashlib.md5(username.encode('utf-8') +
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auth_url.encode('utf-8')).hexdigest()
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base_dir = cliutils.env('NOVACLIENT_UUID_CACHE_DIR',
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default="~/.novaclient")
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return os.path.expanduser(os.path.join(base_dir, uniqifier))
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def _prepare_directory(self):
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try:
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os.makedirs(self.directory, 0o755)
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except OSError:
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# NOTE(kiall): This is typically either permission denied while
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# attempting to create the directory, or the
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# directory already exists. Either way, don't
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# fail.
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pass
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def clear_class(self, obj_class):
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self._prepare_directory()
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resource = obj_class.__name__.lower()
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resource_glob = os.path.join(self.directory, "%s-*-cache" % resource)
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for filename in glob.iglob(resource_glob):
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try:
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os.unlink(filename)
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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def _write_attribute(self, resource, attribute, value):
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self._prepare_directory()
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filename = "%s-%s-cache" % (resource, attribute.replace('_', '-'))
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path = os.path.join(self.directory, filename)
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with open(path, 'a') as f:
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f.write("%s\n" % value)
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def write_object(self, obj):
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resource = obj.__class__.__name__.lower()
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for attribute in self.attributes:
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value = getattr(obj, attribute, None)
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if value:
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self._write_attribute(resource, attribute, value)
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class SessionClient(adapter.LegacyJsonAdapter):
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def __init__(self, *args, **kwargs):
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self.times = []
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super(SessionClient, self).__init__(*args, **kwargs)
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def request(self, url, method, **kwargs):
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# NOTE(jamielennox): The standard call raises errors from
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# keystoneclient, where we need to raise the novaclient errors.
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raise_exc = kwargs.pop('raise_exc', True)
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start_time = time.time()
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resp, body = super(SessionClient, self).request(url,
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method,
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raise_exc=False,
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**kwargs)
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end_time = time.time()
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self.times.append(('%s %s' % (method, url),
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start_time, end_time))
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if raise_exc and resp.status_code >= 400:
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raise exceptions.from_response(resp, body, url, method)
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return resp, body
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def get_timings(self):
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return self.times
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def reset_timings(self):
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self.times = []
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def _original_only(f):
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"""Indicates and enforces that this function can only be used if we are
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using the original HTTPClient object.
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We use this to specify that if you use the newer Session HTTP client then
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you are aware that the way you use your client has been updated and certain
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functions are no longer allowed to be used.
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"""
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@functools.wraps(f)
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def wrapper(self, *args, **kwargs):
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if isinstance(self.client, SessionClient):
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msg = ('This call is no longer available. The operation should '
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'be performed on the session object instead.')
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raise exceptions.InvalidUsage(msg)
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return f(self, *args, **kwargs)
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return wrapper
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class HTTPClient(object):
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USER_AGENT = 'python-novaclient'
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def __init__(self, user, password, projectid=None, auth_url=None,
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insecure=False, timeout=None, proxy_tenant_id=None,
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proxy_token=None, region_name=None,
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endpoint_type='publicURL', service_type=None,
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service_name=None, volume_service_name=None,
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timings=False, bypass_url=None,
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os_cache=False, no_cache=True,
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http_log_debug=False, auth_system='keystone',
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auth_plugin=None, auth_token=None,
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cacert=None, tenant_id=None, user_id=None,
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connection_pool=False):
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self.user = user
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self.user_id = user_id
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self.password = password
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self.projectid = projectid
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self.tenant_id = tenant_id
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self._connection_pool = (_ClientConnectionPool()
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if connection_pool else None)
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# This will be called by #_get_password if self.password is None.
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# EG if a password can only be obtained by prompting the user, but a
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# token is available, you don't want to prompt until the token has
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# been proven invalid
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self.password_func = None
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if auth_system and auth_system != 'keystone' and not auth_plugin:
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raise exceptions.AuthSystemNotFound(auth_system)
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if not auth_url and auth_system and auth_system != 'keystone':
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auth_url = auth_plugin.get_auth_url()
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if not auth_url:
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raise exceptions.EndpointNotFound()
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self.auth_url = auth_url.rstrip('/') if auth_url else auth_url
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self.version = 'v1.1'
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self.region_name = region_name
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self.endpoint_type = endpoint_type
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self.service_type = service_type
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self.service_name = service_name
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self.volume_service_name = volume_service_name
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self.timings = timings
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self.bypass_url = bypass_url.rstrip('/') if bypass_url else bypass_url
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self.os_cache = os_cache or not no_cache
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self.http_log_debug = http_log_debug
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if timeout is not None:
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self.timeout = float(timeout)
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else:
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self.timeout = None
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self.times = [] # [("item", starttime, endtime), ...]
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self.management_url = self.bypass_url or None
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self.auth_token = auth_token
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self.proxy_token = proxy_token
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self.proxy_tenant_id = proxy_tenant_id
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self.keyring_saver = None
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self.keyring_saved = False
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if insecure:
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self.verify_cert = False
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else:
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if cacert:
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self.verify_cert = cacert
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else:
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self.verify_cert = True
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self.auth_system = auth_system
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self.auth_plugin = auth_plugin
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self._session = None
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self._current_url = None
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self._logger = logging.getLogger(__name__)
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if self.http_log_debug and not self._logger.handlers:
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# Logging level is already set on the root logger
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ch = logging.StreamHandler()
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self._logger.addHandler(ch)
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self._logger.propagate = False
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if hasattr(requests, 'logging'):
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rql = requests.logging.getLogger(requests.__name__)
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rql.addHandler(ch)
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# Since we have already setup the root logger on debug, we
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# have to set it up here on WARNING (its original level)
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# otherwise we will get all the requests logging messages
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rql.setLevel(logging.WARNING)
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def use_token_cache(self, use_it):
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self.os_cache = use_it
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def unauthenticate(self):
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"""Forget all of our authentication information."""
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self.management_url = None
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self.auth_token = None
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def set_management_url(self, url):
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self.management_url = url
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def get_timings(self):
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return self.times
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def reset_timings(self):
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self.times = []
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def _redact(self, target, path, text=None):
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"""Replace the value of a key in `target`.
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The key can be at the top level by specifying a list with a single
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key as the path. Nested dictionaries are also supported by passing a
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list of keys to be navigated to find the one that should be replaced.
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In this case the last one is the one that will be replaced.
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:param dict target: the dictionary that may have a key to be redacted;
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modified in place
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:param list path: a list representing the nested structure in `target`
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that should be redacted; modified in place
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:param string text: optional text to use as a replacement for the
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redacted key. if text is not specified, the
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default text will be sha1 hash of the value being
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redacted
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"""
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key = path.pop()
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# move to the most nested dict
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for p in path:
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try:
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target = target[p]
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except KeyError:
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return
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if key in target:
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if text:
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target[key] = text
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else:
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# because in python3 byte string handling is ... ug
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value = target[key].encode('utf-8')
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sha1sum = hashlib.sha1(value)
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target[key] = "{SHA1}%s" % sha1sum.hexdigest()
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def http_log_req(self, method, url, kwargs):
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if not self.http_log_debug:
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return
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string_parts = ['curl -g -i']
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if not kwargs.get('verify', True):
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string_parts.append(' --insecure')
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string_parts.append(" '%s'" % url)
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string_parts.append(' -X %s' % method)
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headers = copy.deepcopy(kwargs['headers'])
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self._redact(headers, ['X-Auth-Token'])
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# because dict ordering changes from 2 to 3
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keys = sorted(headers.keys())
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for name in keys:
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value = headers[name]
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header = ' -H "%s: %s"' % (name, value)
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string_parts.append(header)
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if 'data' in kwargs:
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data = json.loads(kwargs['data'])
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self._redact(data, ['auth', 'passwordCredentials', 'password'])
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string_parts.append(" -d '%s'" % json.dumps(data))
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self._logger.debug("REQ: %s" % "".join(string_parts))
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def http_log_resp(self, resp):
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if not self.http_log_debug:
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return
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if resp.text and resp.status_code != 400:
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try:
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body = json.loads(resp.text)
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self._redact(body, ['access', 'token', 'id'])
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except ValueError:
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body = None
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else:
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body = None
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self._logger.debug("RESP: [%(status)s] %(headers)s\nRESP BODY: "
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"%(text)s\n", {'status': resp.status_code,
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'headers': resp.headers,
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'text': json.dumps(body)})
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def open_session(self):
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if not self._connection_pool:
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self._session = requests.Session()
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def close_session(self):
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if self._session and not self._connection_pool:
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self._session.close()
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self._session = None
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def _get_session(self, url):
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if self._connection_pool:
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magic_tuple = parse.urlsplit(url)
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scheme, netloc, path, query, frag = magic_tuple
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service_url = '%s://%s' % (scheme, netloc)
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if self._current_url != service_url:
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# Invalidate Session object in case the url is somehow changed
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if self._session:
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self._session.close()
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self._current_url = service_url
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self._logger.debug(
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"New session created for: (%s)" % service_url)
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self._session = requests.Session()
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self._session.mount(service_url,
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self._connection_pool.get(service_url))
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return self._session
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elif self._session:
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return self._session
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def request(self, url, method, **kwargs):
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kwargs.setdefault('headers', kwargs.get('headers', {}))
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kwargs['headers']['User-Agent'] = self.USER_AGENT
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kwargs['headers']['Accept'] = 'application/json'
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if 'body' in kwargs:
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kwargs['headers']['Content-Type'] = 'application/json'
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kwargs['data'] = json.dumps(kwargs['body'])
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del kwargs['body']
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if self.timeout is not None:
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kwargs.setdefault('timeout', self.timeout)
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kwargs['verify'] = self.verify_cert
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self.http_log_req(method, url, kwargs)
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request_func = requests.request
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session = self._get_session(url)
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if session:
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request_func = session.request
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resp = request_func(
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method,
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url,
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**kwargs)
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self.http_log_resp(resp)
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if resp.text:
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# TODO(dtroyer): verify the note below in a requests context
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# NOTE(alaski): Because force_exceptions_to_status_code=True
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# httplib2 returns a connection refused event as a 400 response.
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# To determine if it is a bad request or refused connection we need
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# to check the body. httplib2 tests check for 'Connection refused'
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# or 'actively refused' in the body, so that's what we'll do.
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if resp.status_code == 400:
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if ('Connection refused' in resp.text or
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'actively refused' in resp.text):
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raise exceptions.ConnectionRefused(resp.text)
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try:
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body = json.loads(resp.text)
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except ValueError:
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body = None
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else:
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body = None
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if resp.status_code >= 400:
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raise exceptions.from_response(resp, body, url, method)
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return resp, body
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def _time_request(self, url, method, **kwargs):
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start_time = time.time()
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resp, body = self.request(url, method, **kwargs)
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self.times.append(("%s %s" % (method, url),
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start_time, time.time()))
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return resp, body
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def _cs_request(self, url, method, **kwargs):
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if not self.management_url:
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self.authenticate()
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if url is None:
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# To get API version information, it is necessary to GET
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# a nova endpoint directly without "v2/<tenant-id>".
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magic_tuple = parse.urlsplit(self.management_url)
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scheme, netloc, path, query, frag = magic_tuple
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path = re.sub(r'v[1-9]/[a-z0-9]+$', '', path)
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url = parse.urlunsplit((scheme, netloc, path, None, None))
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else:
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url = self.management_url + url
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# Perform the request once. If we get a 401 back then it
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# might be because the auth token expired, so try to
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# re-authenticate and try again. If it still fails, bail.
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try:
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kwargs.setdefault('headers', {})['X-Auth-Token'] = self.auth_token
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if self.projectid:
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kwargs['headers']['X-Auth-Project-Id'] = self.projectid
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resp, body = self._time_request(url, method, **kwargs)
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return resp, body
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except exceptions.Unauthorized as e:
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try:
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# first discard auth token, to avoid the possibly expired
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# token being re-used in the re-authentication attempt
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self.unauthenticate()
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# overwrite bad token
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self.keyring_saved = False
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self.authenticate()
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kwargs['headers']['X-Auth-Token'] = self.auth_token
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resp, body = self._time_request(url, method, **kwargs)
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return resp, body
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except exceptions.Unauthorized:
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raise e
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def _get_password(self):
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if not self.password and self.password_func:
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self.password = self.password_func()
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return self.password
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def get(self, url, **kwargs):
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return self._cs_request(url, 'GET', **kwargs)
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def post(self, url, **kwargs):
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return self._cs_request(url, 'POST', **kwargs)
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def put(self, url, **kwargs):
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return self._cs_request(url, 'PUT', **kwargs)
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def delete(self, url, **kwargs):
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return self._cs_request(url, 'DELETE', **kwargs)
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def _extract_service_catalog(self, url, resp, body, extract_token=True):
|
|
"""See what the auth service told us and process the response.
|
|
We may get redirected to another site, fail or actually get
|
|
back a service catalog with a token and our endpoints.
|
|
"""
|
|
|
|
# content must always present
|
|
if resp.status_code == 200 or resp.status_code == 201:
|
|
try:
|
|
self.auth_url = url
|
|
self.service_catalog = \
|
|
service_catalog.ServiceCatalog(body)
|
|
if extract_token:
|
|
self.auth_token = self.service_catalog.get_token()
|
|
self.tenant_id = self.service_catalog.get_tenant_id()
|
|
|
|
management_url = self.service_catalog.url_for(
|
|
attr='region',
|
|
filter_value=self.region_name,
|
|
endpoint_type=self.endpoint_type,
|
|
service_type=self.service_type,
|
|
service_name=self.service_name,
|
|
volume_service_name=self.volume_service_name,)
|
|
self.management_url = management_url.rstrip('/')
|
|
return None
|
|
except exceptions.AmbiguousEndpoints:
|
|
print(_("Found more than one valid endpoint. Use a more "
|
|
"restrictive filter"))
|
|
raise
|
|
except KeyError:
|
|
raise exceptions.AuthorizationFailure()
|
|
except exceptions.EndpointNotFound:
|
|
print(_("Could not find any suitable endpoint. Correct "
|
|
"region?"))
|
|
raise
|
|
|
|
elif resp.status_code == 305:
|
|
return resp.headers['location']
|
|
else:
|
|
raise exceptions.from_response(resp, body, url)
|
|
|
|
def _fetch_endpoints_from_auth(self, url):
|
|
"""We have a token, but don't know the final endpoint for
|
|
the region. We have to go back to the auth service and
|
|
ask again. This request requires an admin-level token
|
|
to work. The proxy token supplied could be from a low-level enduser.
|
|
|
|
We can't get this from the keystone service endpoint, we have to use
|
|
the admin endpoint.
|
|
|
|
This will overwrite our admin token with the user token.
|
|
"""
|
|
|
|
# GET ...:5001/v2.0/tokens/#####/endpoints
|
|
url = '/'.join([url, 'tokens', '%s?belongsTo=%s'
|
|
% (self.proxy_token, self.proxy_tenant_id)])
|
|
self._logger.debug("Using Endpoint URL: %s" % url)
|
|
resp, body = self._time_request(
|
|
url, "GET", headers={'X-Auth-Token': self.auth_token})
|
|
return self._extract_service_catalog(url, resp, body,
|
|
extract_token=False)
|
|
|
|
def authenticate(self):
|
|
magic_tuple = netutils.urlsplit(self.auth_url)
|
|
scheme, netloc, path, query, frag = magic_tuple
|
|
port = magic_tuple.port
|
|
if port is None:
|
|
port = 80
|
|
path_parts = path.split('/')
|
|
for part in path_parts:
|
|
if len(part) > 0 and part[0] == 'v':
|
|
self.version = part
|
|
break
|
|
|
|
if self.auth_token and self.management_url:
|
|
self._save_keys()
|
|
return
|
|
|
|
# TODO(sandy): Assume admin endpoint is 35357 for now.
|
|
# Ideally this is going to have to be provided by the service catalog.
|
|
new_netloc = netloc.replace(':%d' % port, ':%d' % (35357,))
|
|
admin_url = parse.urlunsplit(
|
|
(scheme, new_netloc, path, query, frag))
|
|
|
|
auth_url = self.auth_url
|
|
if self.version == "v2.0": # FIXME(chris): This should be better.
|
|
while auth_url:
|
|
if not self.auth_system or self.auth_system == 'keystone':
|
|
auth_url = self._v2_auth(auth_url)
|
|
else:
|
|
auth_url = self._plugin_auth(auth_url)
|
|
|
|
# Are we acting on behalf of another user via an
|
|
# existing token? If so, our actual endpoints may
|
|
# be different than that of the admin token.
|
|
if self.proxy_token:
|
|
if self.bypass_url:
|
|
self.set_management_url(self.bypass_url)
|
|
else:
|
|
self._fetch_endpoints_from_auth(admin_url)
|
|
# Since keystone no longer returns the user token
|
|
# with the endpoints any more, we need to replace
|
|
# our service account token with the user token.
|
|
self.auth_token = self.proxy_token
|
|
else:
|
|
try:
|
|
while auth_url:
|
|
auth_url = self._v1_auth(auth_url)
|
|
# In some configurations nova makes redirection to
|
|
# v2.0 keystone endpoint. Also, new location does not contain
|
|
# real endpoint, only hostname and port.
|
|
except exceptions.AuthorizationFailure:
|
|
if auth_url.find('v2.0') < 0:
|
|
auth_url = auth_url + '/v2.0'
|
|
self._v2_auth(auth_url)
|
|
|
|
if self.bypass_url:
|
|
self.set_management_url(self.bypass_url)
|
|
elif not self.management_url:
|
|
raise exceptions.Unauthorized('Nova Client')
|
|
|
|
self._save_keys()
|
|
|
|
def _save_keys(self):
|
|
# Store the token/mgmt url in the keyring for later requests.
|
|
if (self.keyring_saver and self.os_cache and not self.keyring_saved
|
|
and self.auth_token and self.management_url
|
|
and self.tenant_id):
|
|
self.keyring_saver.save(self.auth_token,
|
|
self.management_url,
|
|
self.tenant_id)
|
|
# Don't save it again
|
|
self.keyring_saved = True
|
|
|
|
def _v1_auth(self, url):
|
|
if self.proxy_token:
|
|
raise exceptions.NoTokenLookupException()
|
|
|
|
headers = {'X-Auth-User': self.user,
|
|
'X-Auth-Key': self._get_password()}
|
|
if self.projectid:
|
|
headers['X-Auth-Project-Id'] = self.projectid
|
|
|
|
resp, body = self._time_request(url, 'GET', headers=headers)
|
|
if resp.status_code in (200, 204): # in some cases we get No Content
|
|
try:
|
|
mgmt_header = 'x-server-management-url'
|
|
self.management_url = resp.headers[mgmt_header].rstrip('/')
|
|
self.auth_token = resp.headers['x-auth-token']
|
|
self.auth_url = url
|
|
except (KeyError, TypeError):
|
|
raise exceptions.AuthorizationFailure()
|
|
elif resp.status_code == 305:
|
|
return resp.headers['location']
|
|
else:
|
|
raise exceptions.from_response(resp, body, url)
|
|
|
|
def _plugin_auth(self, auth_url):
|
|
return self.auth_plugin.authenticate(self, auth_url)
|
|
|
|
def _v2_auth(self, url):
|
|
"""Authenticate against a v2.0 auth service."""
|
|
if self.auth_token:
|
|
body = {"auth": {
|
|
"token": {"id": self.auth_token}}}
|
|
elif self.user_id:
|
|
body = {"auth": {
|
|
"passwordCredentials": {"userId": self.user_id,
|
|
"password": self._get_password()}}}
|
|
else:
|
|
body = {"auth": {
|
|
"passwordCredentials": {"username": self.user,
|
|
"password": self._get_password()}}}
|
|
|
|
if self.tenant_id:
|
|
body['auth']['tenantId'] = self.tenant_id
|
|
elif self.projectid:
|
|
body['auth']['tenantName'] = self.projectid
|
|
|
|
return self._authenticate(url, body)
|
|
|
|
def _authenticate(self, url, body, **kwargs):
|
|
"""Authenticate and extract the service catalog."""
|
|
method = "POST"
|
|
token_url = url + "/tokens"
|
|
|
|
# Make sure we follow redirects when trying to reach Keystone
|
|
resp, respbody = self._time_request(
|
|
token_url,
|
|
method,
|
|
body=body,
|
|
allow_redirects=True,
|
|
**kwargs)
|
|
|
|
return self._extract_service_catalog(url, resp, respbody)
|
|
|
|
|
|
def _construct_http_client(username=None, password=None, project_id=None,
|
|
auth_url=None, insecure=False, timeout=None,
|
|
proxy_tenant_id=None, proxy_token=None,
|
|
region_name=None, endpoint_type='publicURL',
|
|
extensions=None, service_type='compute',
|
|
service_name=None, volume_service_name=None,
|
|
timings=False, bypass_url=None, os_cache=False,
|
|
no_cache=True, http_log_debug=False,
|
|
auth_system='keystone', auth_plugin=None,
|
|
auth_token=None, cacert=None, tenant_id=None,
|
|
user_id=None, connection_pool=False, session=None,
|
|
auth=None, user_agent='python-novaclient',
|
|
interface=None, **kwargs):
|
|
if session:
|
|
return SessionClient(session=session,
|
|
auth=auth,
|
|
interface=interface or endpoint_type,
|
|
service_type=service_type,
|
|
region_name=region_name,
|
|
service_name=service_name,
|
|
user_agent=user_agent,
|
|
**kwargs)
|
|
else:
|
|
# FIXME(jamielennox): username and password are now optional. Need
|
|
# to test that they were provided in this mode.
|
|
return HTTPClient(username,
|
|
password,
|
|
user_id=user_id,
|
|
projectid=project_id,
|
|
tenant_id=tenant_id,
|
|
auth_url=auth_url,
|
|
auth_token=auth_token,
|
|
insecure=insecure,
|
|
timeout=timeout,
|
|
auth_system=auth_system,
|
|
auth_plugin=auth_plugin,
|
|
proxy_token=proxy_token,
|
|
proxy_tenant_id=proxy_tenant_id,
|
|
region_name=region_name,
|
|
endpoint_type=endpoint_type,
|
|
service_type=service_type,
|
|
service_name=service_name,
|
|
volume_service_name=volume_service_name,
|
|
timings=timings,
|
|
bypass_url=bypass_url,
|
|
os_cache=os_cache,
|
|
http_log_debug=http_log_debug,
|
|
cacert=cacert,
|
|
connection_pool=connection_pool)
|
|
|
|
|
|
def get_client_class(version):
|
|
version_map = {
|
|
'1.1': 'novaclient.v1_1.client.Client',
|
|
'2': 'novaclient.v1_1.client.Client',
|
|
'3': 'novaclient.v1_1.client.Client',
|
|
}
|
|
try:
|
|
client_path = version_map[str(version)]
|
|
except (KeyError, ValueError):
|
|
msg = _("Invalid client version '%(version)s'. must be one of: "
|
|
"%(keys)s") % {'version': version,
|
|
'keys': ', '.join(version_map.keys())}
|
|
raise exceptions.UnsupportedVersion(msg)
|
|
|
|
return importutils.import_class(client_path)
|
|
|
|
|
|
def Client(version, *args, **kwargs):
|
|
client_class = get_client_class(version)
|
|
return client_class(*args, **kwargs)
|