def readDataFromFD(self, fd):
length = 0
while True:
try:
data = fd.recv(8192)
if len(data) == 0:
# Disconnect
return 0
if fd in self.connMap:
try:
self.connMap[fd][0].handleRead(data)
except Exception as e:
NNLogger.logConnection("[ERROR] Handle read data from client (%s:%d) error:%s | %s" % (self.connMap[fd][2], self.connMap[fd][3], e, traceback.format_exc()))
return NNError.TCP_DATA_HANDLE_ERROR
length += len(data)
else:
# Internal error
NNLogger.logConnection("[ERROR] Read FD not in cache")
return NNError.TCP_DATA_HANDLE_ERROR
except socket.error as e:
if e.errno == errno.EWOULDBLOCK:
# Read done
return length
else:
# Other read error
return NNError.TCP_SOCK_READ_ERROR
def loop(self):
rlist = [self.serverSocket]
wlist = [self.serverSocket]
while True:
readFD, writeFD, exceptFD = select.select(rlist, wlist, []);
for fd in readFD:
if fd == self.serverSocket:
sock, (addr, port) = self.serverSocket.accept()
sock.setblocking(0)
try:
self.connMap[sock] = (self.connClass(sock, addr, port), sock, addr, port)
rlist.append(sock)
wlist.append(sock)
except Exception as e:
NNLogger.logConnection("[ERROR] Create instance of connection class [%s] error:%s" % (connClass, e))
sock.close()
else:
connection = self.connMap[fd][0]
ret = self.readDataFromFD(fd)
if ret <= 0:
connection.handleClose(ret)
fd.close()
rlist.remove(fd)
wlist.remove(fd)
writeFD.remove(fd)
del self.connMap[fd]
else:
if len(connection.sendBuffer) > 0:
writeLen = self.writeDataToFD(fd, connection.sendBuffer)
if writeLen < 0:
connection.handleClose(ret)
fd.close()
rlist.remove(fd)
wlist.remove(fd)
writeFD.remove(fd)
del self.connMap[fd]
else:
self.sendBuffer = self.sendBuffer[writeLen:]
wlist.append(fd)
for fd in writeFD:
connection = self.connMap[fd][0]
connection.handleWrite()
if len(connection.sendBuffer) == 0:
wlist.remove(connection.socket)
def handleClose(self, errCode):
NNLogger.logConnection("[CLOSE] %s:%d %d" % (self.peerAddr, self.peerPort, errCode))
def handleAccept(self):
NNLogger.logConnection("[ACCEPT] %s:%d" % (self.peerAddr, self.peerPort))
