def listening(self):
"""
loop in which the client waits for the servers bewegeString and answers
with his calculated destination
after we get 'Ende' the ssl connection will be closed
"""
while True:
try:
bewegeString = read(self.connection)
if self.worldSize == None:
write(self.connection, 'Weltgroesse?')
self.worldSize = read(self.connection)
print 'world size:', self.worldSize
print 'bewegeString=' + bewegeString #string which is given by the server
if 'Ende' in bewegeString:
break
#sending our calculated destination
destination = str(self.beast.bewege(bewegeString))
if len(destination) > 0 and destination != 'None':
print 'sent=' + destination
write(self.connection, destination)
except Exception as e:
print time.asctime(), e, ': lost connection to Server'
break
self.connection.close()
def registration(self):
"""
default activity with requests and responses between client and server
after sending 'Anmeldung!' and receiving an char the client is
registered and the listening-loop will be started
"""
if not self.connectToServer():
return
request = 'Spielbeginn?'
print 'request:', request
write(self.connection, request)
response = read(self.connection)
print 'cur time:', time.asctime()
print 'response:', response
write(self.connection, 'Anmeldung moeglich?')
if read(self.connection) == 'Ja':
print 'Anmeldung moeglich? Ja'
write(self.connection, 'Anmeldung!')
response = read(self.connection)
if response in string.ascii_letters and len(response) == 1:
print 'Assigned Beast name:', response
print 'Waiting for bewege() requests...'
else:
print 'Anmeldung gescheitert'
return
else:
print 'Anmeldung gescheitert'
return
self.listening()
def registerBeast(self):
"""
called by registration()
register the client in current game
"""
write(self.connection, "Anmeldung!")
beastName = read(self.connection)
return beastName
def getGameStartTime(self):
"""
sends ask for the start time of next game to GUI
"""
if 10008 in self.hostPort:
write(self.connection, "startdelay?")
else:
write(self.connection, "Spielbeginn?")
self.emit(QtCore.SIGNAL('sendStartTime(QString)'),read(self.connection))
def listening(self):
"""
loop in which the client waits for the servers bewegeString
bewegeString is split to particular arguments which will be sent to GUI
after we get 'Ende' the ssl connection will be closed
"""
while self.running:
try:
self.bewegeString = read(self.connection)
surrounding = self.bewegeString.split(';')[1]
energy = self.bewegeString.split(';')[0]
worldBeforeTenRounds=self.bewegeString.split(';')[2]
if self.deadBeast and worldBeforeTenRounds!='':
time.sleep(0.2)
if self.worldSize == None:
write(self.connection, 'Weltgroesse?')
self.worldSize = read(self.connection)
if 'Ende' in self.bewegeString:
if self.connectedToServer:
self.leaveServer()
if self.bewegeString.startswith(';;'):
self.deadBeast = True
if 'Ende' in self.bewegeString:
semiCounter=0
counter=0
while semiCounter<2:
if self.bewegeString[counter]==';':
semiCounter+=1
counter+=1
strLastTenRounds=self.bewegeString[counter:]
self.emit(QtCore.SIGNAL("notify(QString,QString,QString)"), surrounding, energy, strLastTenRounds)
break
self.emit(QtCore.SIGNAL("notify(QString,QString,QString)"), surrounding, energy, worldBeforeTenRounds)
except Exception as e:
print time.asctime(), e, ': lost connection to Server'
self.leaveServer()
def isRegisterAllowed(self):
"""
called by registration()
checks if server provides an open game to register in
"""
write(self.connection, "Anmeldung moeglich?")
response = read(self.connection)
if response == 'Ja':
return True
return False
def bewege(self, paramString):
"""
forwards the paramString to the client
@param paramString string from server
@return destination by the client's beast calculated destination
"""
try:
if self.socket is None:
return ''
write(self.socket, paramString)
params = paramString.split(';', 2)
energy = params[0]
environment = params[1]
try:
intEnergy = int(energy)
except ValueError:
intEnergy = 0
if len(energy) > 0 and intEnergy > 0 and environment != 'Ende':
timeoutTime = time.time() + 5 # 5 s timeout
while time.time() < timeoutTime:
time.sleep(0.1)
inputReady, outputReady, exceptionReady = select.select([self.socket], [], [], 0)
for sendingClient in inputReady:
answer = read(sendingClient)
if answer == '?':
return answer
try:
if int(answer) in range(25):
return answer
except ValueError: # parsing to int
pass
if len(answer) > 0:
write(self.socket, self.server.processClientCommunication(socket, answer))
return '' # if we haven't received a move after 5 s, return empty string
except socket.error as e:
self.log.warning(str(e) + ',socket.error: closing socket')
self.socket.close()
self.socket = None
except AttributeError as e: # catch AttributeError: 'NoneType' object has no attribute 'write'
self.log.warning(str(e) + ',AttributeError: closing socket')
self.socket.close()
self.socket = None
def run(self):
self.running=True
try:
self.log.info('Starting server on port ' + str(Config.__getPort__()) + '...')
self.bindsocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.bindsocket.bind(('', Config.__getPort__()))
self.bindsocket.listen(5)
self.bindsocket.settimeout(0.1)
while self.running:
# initialize
self.closeConnections()
self.clientMap = {}
self.clientIpCountMap = {}
while self.running and not self.game.gameFinished:
try: # prevent exception if no client wants to connect
newsocket, fromaddr = self.bindsocket.accept()
newsocket.settimeout(0.1)
if (Config.__getSSL__()):
client = ssl.wrap_socket(newsocket, server_side=True, certfile="ssl/server.crt",
keyfile="ssl/server.key", ssl_version=ssl.PROTOCOL_SSLv3)
else:
client = newsocket
self.clientMap[client] = fromaddr, None
self.log.info('client ' + str(self.clientMap[client]) + ' has connected')
except KeyboardInterrupt:
self.log.info('\nCtrl-C was pressed, stopping server...')
self.bindsocket.close()
self.log.info('Server stopped.')
sys.exit()
except socket.timeout:
pass
except socket.error as e:
# Spits out tons of exceptions
self.log.info(str(e.errno) + str(e))
inputReady, outputReady, exceptionReady = select.select(self.clientMap.keys(), [], [], 0)
for client in inputReady: # go through all clients which sent a request
clientip = None #Overwritten by local variables?? TODO: check! -> see line 86
#try:
request = read(client)
#except Exception as e:
# print e
response = self.processClientCommunication(client, request)
self.log.info('current clients: ' + str(self.clientMap))
self.log.info('current IP-Connections: ' + str(self.clientIpCountMap))
try: # prevent exceptions if client has disconnected
write(client, response)
except:
self.log.info('client ' + str(self.clientMap[client]) + ' has gone')
self.clientMap.pop(client)
self.decreaseClientIpConnections(clientip)
for client in exceptionReady and self.running:
self.log.info('assumed shutdown() -> exception occurred with client: ', str(self.clientMap[client]))
if self.clientMap.has_key(client):
client.shutdown(socket.RDWR)
client.close()
self.clientMap.pop(client)
self.decreaseClientIpConnections(clientip)
time.sleep(0.01)
finally:
self.closeConnections()
self.bindsocket.close()