try:
while True: # read until we stop
message = session.read_until(b'\n', timeout=0.1)
if message == b'': # check if there was no data to read
break # now we stop
print(message) # print message if not stopped
except EOFError: # If connection was closed
print('connection closed')
class mayaClient(asynchat.async_chat) :
...
def __init__(self, sock, clientType):
asynchat.async_chat.__init__(self, sock=sock)
self.clientType = clientType
self.ibuffer = []
self.obuffer = ""
self.set_terminator("\r\n")
self.cumulativeResponse = ""
@classmethod
def withSocket(cls, host, clientType, log) :
melSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
portNumber = cls.MEL_PORT_NUMBER if clientType == cls.MEL else cls.PYTHON_PORT_NUMBER
melSocket.connect((host, portNumber))
return cls(melSocket, clientType, log)
#############################################################
# pushAndWait
#############################################################
def pushAndWait(self, command, timeout=60) :
"""
ACTION: Push a command and a "command complete" indicator
If command completed, return number of milliseconds it took
If command timed out without completing, return -1
INPUT: command as string
description (optional) as string for more informative logging
timeout in seconds as int after which to give up
OUTPUT: X milliseconds if command completed
-1 if not
"""
self.found_terminator()
incrementToSleep = .001
self.push("%s\r\n"%command)
responseToSeek = "Command Complete"
self.push('Whatever command is going to create readable output for %s`); \r\n'%responseToSeek)
timeSlept = 0
while responseToSeek not in self.currentBufferString() and timeSlept < timeout :
self.read()
timeSlept += incrementToSleep
time.sleep(incrementToSleep)
if responseToSeek in self.currentBufferString() :
return timeSlept
return -1
#############################################################
# read
#############################################################
def read(self) :
"""
ACTION: Reads the current available output
and stores it in buffer
"""
try :
self.collect_incoming_data(self.recv(1024))
except Exception, e :
# Don't worry about it just means there's nothing to read
#
pass
#############################################################
# currentBuffer
#############################################################
def currentBuffer(self) :
return self.ibuffer
#############################################################
# currentBufferString
#############################################################
def currentBufferString(self) :
return "".join(self.ibuffer)
#############################################################
# collect_incoming_data
#############################################################
def collect_incoming_data(self, data):
"""Buffer the data"""
self.ibuffer.append(data)
#############################################################
# found_terminator
#############################################################
def found_terminator(self):
print "Clearing %s... from buffer"%self.currentBufferString()[0:20]
self.ibuffer = []
派对迟到了,但这是可以用telnetlib实现的。下面将阅读所有的行,直到什么都没有留下。
timeout=0.1
增加响应到达的时间。在或者如果您总是想等待响应:
^{pr2}$我想我也有同样的问题,我希望这些信息能有所帮助。在我的例子中,我正在连接到Maya中的mel和python端口,因此我不知道此体验是否对您和您的情况有用。在
This answer向我表明我根本不需要Telnet/telnetlib来完成我要做的I/O,并建议使用asynchat。
结果显示,并非所有出现在服务器端的输出都可供客户端读取。在我使用asynchat作为第二种意见之前,我不知道会发生这种情况,并且看到无论如何发送,我仍然没有收到“print‘Complete Command’”的输出。(我试图写“print'Complete Command'”并读取结果,以了解我之前的命令何时完成。)
最后我调用了mel的warning命令,它确实生成了客户端可读的输出。发送无辜的数据作为警告是相当令人讨厌的,但幸运的是这是一个内部工具。在
一个样本,在我还没弄清楚的时候,就拿了一大粒盐:
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