我一直在开发一个 python 应用程序,其中客户端向服务器发送时钟信号,服务器用音频信号响应。
我有两个按钮,一个用于启动时钟,一个用于暂停曲目。
主班
# function I call when I hit the play button
def play(self):
start_song = [250]
global IS_FIRST_PLAY
if IS_FIRST_PLAY:
IS_FIRST_PLAY = False
self.startClock()
if IS_CONNECTED:
client.sendMessage(start_song)
# here I start the clock and send a constant clock signal to the client
def startClock(self):
clock = midi.startClock()
for i in clock:
if IS_CONNECTED:
client.sendMessage(i)
midi.playing = True
# here I pause the track
def pause(self):
stop_song = [252]
if IS_CONNECTED:
client.sendMessage(stop_song)
midi.sendMidiMessage(stop_song)
midi.playing = False
midi.mtClock = [0, 0, 0, 0]
客户端类
# this is the client.sendMessage() function
def sendMessage(self, message):
self.s.sendall(pickle.dumps(message))
服务器类
# this is the class that handles the incoming clock signal for the server
class MyTCPHandler(socketserver.BaseRequestHandler):
def handle(self):
global IS_FIRST_PLAY, IS_PLAYING
thread1 = threading.Thread(target=self.sendAudio)
thread1.start()
while True:
# here throws python an error
self.data = pickle.loads(self.request.recv(12).strip())
这一切都很好,除了一个随机的时刻,当我改变暂停播放时,我不断收到这个错误:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/socketserver.py", line 306, in _handle_request_noblock
self.process_request(request, client_address)
File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/socketserver.py", line 332, in process_request
self.finish_request(request, client_address)
File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/socketserver.py", line 345, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/socketserver.py", line 666, in __init__
self.handle()
File "/Users/cedricgeerinckx/Dropbox/Redux/OSX/Server.py", line 85, in handle
self.data = pickle.loads(self.request.recv(12).strip())
_pickle.UnpicklingError: unpickling stack underflow
这个问题可能是什么?