def __init__(self, ncpus="autodetect", interface="0.0.0.0",
broadcast="255.255.255.255", port=None, secret=None,
timeout=None, restart=False, proto=2, socket_timeout=3600, pid_file=None):
pp.Server.__init__(self, ncpus, (), secret, restart,
proto, socket_timeout)
if pid_file:
with open(pid_file, 'w') as pfile:
print >>pfile, os.getpid()
atexit.register(os.remove, pid_file)
self.host = interface
self.bcast = broadcast
if port is not None:
self.port = port
else:
self.port = ppcommon.randomport()
self.timeout = timeout
self.ncon = 0
self.last_con_time = time.time()
self.ncon_lock = threading.Lock()
self.logger.debug("Starting network server interface=%s port=%i"
% (self.host, self.port))
if self.timeout is not None:
self.logger.debug("ppserver will exit in %i seconds if no "\
"connections with clients exist" % (self.timeout))
ppcommon.start_thread("timeout_check", self.check_timeout)
class _NetworkServer(pp.Server):
"""Network Server Class
"""
def __init__(self, ncpus="autodetect", interface="0.0.0.0",
broadcast="255.255.255.255", port=None, secret=None,
timeout=None, restart=False, proto=2, socket_timeout=3600, pid_file=None):
pp.Server.__init__(self, ncpus, (), secret, restart,
proto, socket_timeout)
if pid_file:
with open(pid_file, 'w') as pfile:
print >>pfile, os.getpid()
atexit.register(os.remove, pid_file)
self.host = interface
self.bcast = broadcast
if port is not None:
self.port = port
else:
self.port = ppcommon.randomport()
self.timeout = timeout
self.ncon = 0
self.last_con_time = time.time()
self.ncon_lock = threading.Lock()
self.logger.debug("Starting network server interface=%s port=%i"
% (self.host, self.port))
if self.timeout is not None:
self.logger.debug("ppserver will exit in %i seconds if no "\
"connections with clients exist" % (self.timeout))
ppcommon.start_thread("timeout_check", self.check_timeout)
def ncon_add(self, val):
"""Keeps track of the number of connections and time of the last one"""
self.ncon_lock.acquire()
self.ncon += val
self.last_con_time = time.time()
self.ncon_lock.release()
def check_timeout(self):
"""Checks if timeout happened and shutdowns server if it did"""
while True:
if self.ncon == 0:
idle_time = time.time() - self.last_con_time
if idle_time < self.timeout:
time.sleep(self.timeout - idle_time)
else:
self.logger.debug("exiting ppserver due to timeout (no client"\
" connections in last %i sec)", self.timeout)
os._exit(0)
else:
time.sleep(self.timeout)
def listen(self):
"""Initiates listenting to incoming connections"""
try:
self.ssocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# following allows ppserver to restart faster on the same port
self.ssocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.ssocket.settimeout(LISTEN_SOCKET_TIMEOUT)
self.ssocket.bind((self.host, self.port))
self.ssocket.listen(5)
except socket.error, e:
self.logger.error("Cannot create socket for %s:%s, %s", self.host, self.port, e)
try:
while 1:
csocket = None
# accept connections from outside
try:
(csocket, address) = self.ssocket.accept()
except socket.timeout:
pass
# don't exit on an interupt due to a signal
except socket.error:
e = sys.exc_info()[1]
if e.errno == errno.EINTR:
pass
if self._exiting:
return
# now do something with the clientsocket
# in this case, we'll pretend this is a threaded server
if csocket:
ppcommon.start_thread("client_socket", self.crun, (csocket, ))
except KeyboardInterrupt:
pass
except:
self.logger.debug("Exception in listen method (possibly expected)", exc_info=True)
finally:
self.logger.debug("Closing server socket")
self.ssocket.close()
def broadcast(self):
"""Initiaates auto-discovery mechanism"""
discover = ppauto.Discover(self)
ppcommon.start_thread("server_broadcast", discover.run,
((self.host, self.port), (self.bcast, self.port)))