当客户端连接到管道并发送数据时,我可以收到罚款,并且可以继续接收数据。当客户端断开连接且while循环仍处于活动状态时,就会出现麻烦,connection.recv()不会阻塞,因此会不断疯狂地循环!因此,我需要一种方法来检测客户端是否仍处于连接状态。
我有以下代码:
pipe = './pipes/uds_defzone-lrecv'
try:
os.unlink(pipe)
except OSError:
if os.path.exists(pipe):
raise
self.logger.debug('Created UDS pipe: ' + pipe)
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.bind(pipe)
sock.listen(1)
self.logger.debug('Waiting for connection: ' + pipe)
connection, client_address = sock.accept()
self.logger.debug('Connection from: ' + client_address)
while True:
self.logger.debug('Waiting for data')
data = connection.recv(4096)
self.logger.debug('Received: ' + str(data))
供参考,sender.py代码:
# Create a UDS socket
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
# Connect the socket to the port where the server is listening
pipe = './pipes/uds_defzone-lrecv'
logger.debug('connecting to: ' + pipe)
try:
sock.connect(pipe)
except socket.error, msg:
logger.debug(msg)
sys.exit(1)
try:
message = 'THIS IS A TEST'
logger.debug('sending: ' + message)
sock.sendall(message)
time.sleep(2)
finally:
logger.debug('closing socket')
sock.close()
TIA!
我可以用下面的代码放慢速度,但不完全是我想要的。
while True:
try:
self.logger.debug('Waiting for data')
data_present = select.select([sock], [], [], 30)
if data_present[0]:
data = connection.recv(4096)
self.logger.debug('Received: ' + data)
except select.timeout:
pass
作为参考,这是我想出的代码:
while True:
logger.debug('Waiting for data')
data = connection.recv(4096)
if not data == '':
logger.debug('Received: ' + data)
else:
logger.debug('Nothing received')
break
我在此过程中遇到的黑客...在客户端可以发送空数据以表示信号的合法情况下,可以使用吗?
while True:
try:
logger.debug('Waiting for data')
data = connection.recv(4096)
# *** This throws an exception when client has disconnected
x = connection.getpeername()
logger.debug('Received: ' + data)
except:
logger.debug('Client disconnected')
break
connection.recv()不会阻塞,因此会不断疯狂循环!因此,我需要一种方法来检测客户端是否仍处于连接状态。
如果对等方断开连接,则recv数据将返回空数据(''
)。您需要检查并退出循环。
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