zaqar/zaqar/transport/websocket/driver.py

102 lines
3.1 KiB
Python

# Copyright (c) 2015 Red Hat, 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.
# See the License for the specific language governing permissions and
# limitations under the License.
from oslo_config import cfg
from oslo_log import log as logging
try:
import asyncio
except ImportError:
import trollius as asyncio
from zaqar.common import decorators
from zaqar.i18n import _
from zaqar.transport import auth
from zaqar.transport import base
from zaqar.transport.websocket import factory
_WS_OPTIONS = (
cfg.StrOpt('bind', default='127.0.0.1',
help='Address on which the self-hosting server will listen.'),
cfg.IntOpt('port', default=9000,
help='Port on which the self-hosting server will listen.'),
cfg.IntOpt('external-port', default=None,
help='Port on which the service is provided to the user.'),
cfg.BoolOpt('debug', default=False, help='Print debugging output')
)
_WS_GROUP = 'drivers:transport:websocket'
LOG = logging.getLogger(__name__)
def _config_options():
return [(_WS_GROUP, _WS_OPTIONS)]
class Driver(base.DriverBase):
def __init__(self, conf, api, cache):
super(Driver, self).__init__(conf, None, None, None)
self._api = api
self._cache = cache
self._conf.register_opts(_WS_OPTIONS, group=_WS_GROUP)
self._ws_conf = self._conf[_WS_GROUP]
if self._conf.auth_strategy:
auth_strategy = auth.strategy(self._conf.auth_strategy)
self._auth_strategy = lambda app: auth_strategy.install(
app, self._conf)
else:
self._auth_strategy = None
@decorators.lazy_property(write=False)
def factory(self):
uri = 'ws://' + self._ws_conf.bind + ':' + str(self._ws_conf.port)
return factory.ProtocolFactory(
uri,
debug=self._ws_conf.debug,
handler=self._api,
external_port=self._ws_conf.external_port,
auth_strategy=self._auth_strategy,
loop=asyncio.get_event_loop(),
secret_key=self._conf.signed_url.secret_key)
def listen(self):
"""Self-host using 'bind' and 'port' from the WS config group."""
msgtmpl = _(u'Serving on host %(bind)s:%(port)s')
LOG.info(msgtmpl,
{'bind': self._ws_conf.bind, 'port': self._ws_conf.port})
loop = asyncio.get_event_loop()
coro = loop.create_server(self.factory,
self._ws_conf.bind,
self._ws_conf.port)
server = loop.run_until_complete(coro)
try:
loop.run_forever()
except KeyboardInterrupt:
pass
finally:
server.close()
loop.close()