def stop_service():
if not is_posix():
return
logger.info("Stopping the service")
conn = Client(parameters.get_session_address(), authkey=parameters.get_session_connection_password())
conn.send({'action':'stop','password':None})
r = conn.recv()
conn.close()
logger.debug(r['status'])
def get_session_password():
if not is_posix():
raise NotImplementedError("Client/Server daemons not supported on this system")
logger.info("Retrieving session password")
conn = Client(parameters.get_session_address(), authkey=parameters.get_session_connection_password())
conn.send({'action':'get','password':None})
r = conn.recv()
conn.close()
return r['status'],r['password']
def set_session_password(pwd):
if not is_posix():
return
logger.info("Setting session password")
conn = Client(parameters.get_session_address(), authkey=parameters.get_session_connection_password())
conn.send({'action':'set','password':pwd})
r = conn.recv()
conn.close()
logger.debug(r['status'])
def session_sweeper(lifetime):
"The process that will kill the session daemon eventually"
get_logger(__name__).info("sweeper starts")
sleep(lifetime)
conn = Client(parameters.get_session_address(),
authkey=parameters.get_session_connection_password())
conn.send({'action': 'stop', 'password': None})
ret = conn.recv()
get_logger(__name__).debug(ret['status'])
get_logger(__name__).info("Sweeper ends")
def session_listener(seed, timeout):
""" Session service function with an initial value as a seed
input: seed the initial value stored in the session
timeout the validity period of the session value (in seconds
"""
get_logger(__name__).info("Listener starts")
serv = Listener(parameters.get_session_address(),
authkey=parameters.get_session_connection_password())
serv.password = seed
serv.pwd_timeout = timeout
serv.start_time = datetime.datetime.now()
serv.origin_time = datetime.datetime.now()
while True:
with serv.accept() as conn:
try:
req = conn.recv()
except EOFError:
break
if 'action' in req and req['action'] == 'set':
serv.password = req['password']
serv.start_time = datetime.datetime.now()
conn.send({'status': 'done', 'password': serv.password})
elif 'action' in req and req['action'] == 'get':
if (datetime.datetime.now() -
serv.start_time).total_seconds() < serv.pwd_timeout:
conn.send({'status': 'fresh', 'password': serv.password})
serv.start_time = datetime.datetime.now()
else:
serv.password = None
conn.send({'status': 'stale', 'password': None})
elif 'action' in req and req['action'] == 'stop':
get_logger(__name__).info("Goodbye from listener")
conn.send({'status': 'terminated', 'password': None})
break
else:
conn.send({'status': 'bad command', 'password': None})
get_logger(__name__).info("Listener ends")