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OpenStack Study: websocketproxy.py**** CubicPower OpenStack Study ****
# Copyright (c) 2012 OpenStack Foundation # All Rights Reserved. # # 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. ''' Websocket proxy that is compatible with OpenStack Nova. Leverages websockify.py by Joel Martin ''' import Cookie import socket import websockify from nova.consoleauth import rpcapi as consoleauth_rpcapi from nova import context from nova.openstack.common.gettextutils import _ from nova.openstack.common import log as logging LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class NovaWebSocketProxy(websockify.WebSocketProxy):
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): websockify.WebSocketProxy.__init__(self, unix_target=None, target_cfg=None, ssl_target=None, *args, **kwargs)
**** CubicPower OpenStack Study **** def new_client(self): """Called after a new WebSocket connection has been established.""" # Reopen the eventlet hub to make sure we don't share an epoll # fd with parent and/or siblings, which would be bad from eventlet import hubs hubs.use_hub() cookie = Cookie.SimpleCookie() cookie.load(self.headers.getheader('cookie')) token = cookie['token'].value ctxt = context.get_admin_context() rpcapi = consoleauth_rpcapi.ConsoleAuthAPI() connect_info = rpcapi.check_token(ctxt, token=token) if not connect_info: LOG.audit("Invalid Token: %s", token) raise Exception(_("Invalid Token")) host = connect_info['host'] port = int(connect_info['port']) # Connect to the target self.msg("connecting to: %s:%s" % (host, port)) LOG.audit("connecting to: %s:%s" % (host, port)) tsock = self.socket(host, port, connect=True) # Handshake as necessary if connect_info.get('internal_access_path'): tsock.send("CONNECT %s HTTP/1.1\r\n\r\n" % connect_info['internal_access_path']) while True: data = tsock.recv(4096, socket.MSG_PEEK) if data.find("\r\n\r\n") != -1: if not data.split("\r\n")[0].find("200"): LOG.audit("Invalid Connection Info %s", token) raise Exception(_("Invalid Connection Info")) tsock.recv(len(data)) break if self.verbose and not self.daemon: print(self.traffic_legend) # Start proxying try: self.do_proxy(tsock) except Exception: if tsock: tsock.shutdown(socket.SHUT_RDWR) tsock.close() self.vmsg("%s:%s: Target closed" % (host, port)) LOG.audit("%s:%s: Target closed" % (host, port)) raise
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