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#!/usr/bin/env python
# pylint: disable-msg=C0103
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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.
"""Ajax Console Proxy Server"""
from eventlet import greenthread
from eventlet.green import urllib2
import exceptions
import gettext
import os
import sys
import time
import urlparse
# If ../nova/__init__.py exists, add ../ to Python search path, so that
# it will override what happens to be installed in /usr/(local/)lib/python...
possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
os.pardir,
os.pardir))
if os.path.exists(os.path.join(possible_topdir, 'nova', '__init__.py')):
sys.path.insert(0, possible_topdir)
gettext.install('nova', unicode=1)
from nova import flags
from nova import log as logging
from nova import rpc
from nova import utils
from nova import wsgi
FLAGS = flags.FLAGS
flags.DEFINE_integer('ajax_console_idle_timeout', 300,
'Seconds before idle connection destroyed')
flags.DEFINE_flag(flags.HelpFlag())
flags.DEFINE_flag(flags.HelpshortFlag())
flags.DEFINE_flag(flags.HelpXMLFlag())
LOG = logging.getLogger('nova.ajax_console_proxy')
LOG.setLevel(logging.DEBUG)
LOG.addHandler(logging.StreamHandler())
class AjaxConsoleProxy(object):
tokens = {}
def __call__(self, env, start_response):
try:
if 'QUERY_STRING' in env:
req_url = '%s://%s%s?%s' % (env['wsgi.url_scheme'],
env['HTTP_HOST'],
env['PATH_INFO'],
env['QUERY_STRING'])
else:
req_url = '%s://%s%s' % (env['wsgi.url_scheme'],
env['HTTP_HOST'],
env['PATH_INFO'])
if 'HTTP_REFERER' in env:
auth_url = env['HTTP_REFERER']
else:
auth_url = req_url
auth_params = urlparse.parse_qs(urlparse.urlparse(auth_url).query)
parsed_url = urlparse.urlparse(req_url)
auth_info = AjaxConsoleProxy.tokens[auth_params['token'][0]]
args = auth_info['args']
auth_info['last_activity'] = time.time()
remote_url = ("http://%s:%s%s?token=%s" % (
str(args['host']),
str(args['port']),
parsed_url.path,
str(args['token'])))
opener = urllib2.urlopen(remote_url, env['wsgi.input'].read())
body = opener.read()
info = opener.info()
start_response("200 OK", info.dict.items())
return body
except (exceptions.KeyError):
if env['PATH_INFO'] != '/favicon.ico':
LOG.audit("Unauthorized request %s, %s"
% (req_url, str(env)))
start_response("401 NOT AUTHORIZED", [])
return "Not Authorized"
except Exception:
start_response("500 ERROR", [])
return "Server Error"
def register_listeners(self):
class Callback:
def __call__(self, data, message):
if data['method'] == 'authorize_ajax_console':
AjaxConsoleProxy.tokens[data['args']['token']] = \
{'args': data['args'], 'last_activity': time.time()}
conn = rpc.Connection.instance(new=True)
consumer = rpc.TopicConsumer(
connection=conn,
topic=FLAGS.ajax_console_proxy_topic)
consumer.register_callback(Callback())
def delete_expired_tokens():
now = time.time()
to_delete = []
for k, v in AjaxConsoleProxy.tokens.items():
if now - v['last_activity'] > FLAGS.ajax_console_idle_timeout:
to_delete.append(k)
for k in to_delete:
del AjaxConsoleProxy.tokens[k]
utils.LoopingCall(consumer.fetch, auto_ack=True,
enable_callbacks=True).start(0.1)
utils.LoopingCall(delete_expired_tokens).start(1)
if __name__ == '__main__':
utils.default_flagfile()
FLAGS(sys.argv)
logging.setup()
server = wsgi.Server()
acp = AjaxConsoleProxy()
acp.register_listeners()
server.start(acp, FLAGS.ajax_console_proxy_port, host='0.0.0.0')
server.wait()
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