105 lines
3.3 KiB
Python
105 lines
3.3 KiB
Python
# Copyright 2014
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# The Cloudscaling Group, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import inspect
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import os
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import threading
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import webob
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from keystoneclient import client as keystone_client
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from oslo_config import cfg
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from oslo_log import log as logging
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from gceapi.api import clients
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from gceapi import wsgi_ext as openstack_wsgi
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class Controller(object):
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_lock = threading.RLock()
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_files = {}
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def discovery(self, req, version):
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"""Returns appropriate json by its version."""
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key = version
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if key in self._files:
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return self._files[key]
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auth_data = {
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'project_name': CONF.keystone_authtoken['admin_tenant_name'],
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'username': CONF.keystone_authtoken['admin_user'],
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'password': CONF.keystone_authtoken['admin_password'],
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'auth_url': CONF.keystone_url,
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}
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keystone = keystone_client.Client(**auth_data)
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if keystone.auth_ref is None:
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# Ver2 doesn't create session and performs
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# authentication automatically, but Ver3 does create session
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# if it's not provided and doesn't perform authentication.
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# TODO(use sessions)
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keystone.authenticate()
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catalog = keystone.service_catalog.get_data()
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public_url = clients.get_url_from_catalog(catalog, "gceapi")
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if not public_url:
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public_url = req.host_url
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public_url = public_url.rstrip("/")
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self._lock.acquire()
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try:
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if key in self._files:
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return self._files[key]
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jfile = self._load_file(version)
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jfile = jfile.replace("{HOST_URL}", public_url)
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self._files[key] = jfile
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return jfile
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finally:
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self._lock.release()
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def _load_file(self, version):
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file = version + ".json"
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protocol_dir = CONF.get("protocol_dir")
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if protocol_dir:
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file_name = os.path.join(protocol_dir, file)
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try:
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f = open(file_name)
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result = f.read()
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f.close()
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return result
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except Exception as ex:
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pass
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# NOTE(apavlov): develop mode - try to find inside project
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# ../../etc/gceapi/protocols/
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current_file = os.path.abspath(inspect.getsourcefile(lambda _: None))
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current_dir = os.path.dirname(current_file)
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dir = os.path.join(current_dir, "../../etc/gceapi/protocols")
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file_name = os.path.join(dir, file)
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try:
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f = open(file_name)
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except Exception as ex:
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raise webob.exc.HTTPNotFound(ex)
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result = f.read()
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f.close()
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return result
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def create_resource():
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return openstack_wsgi.Resource(Controller())
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