我编写了一个多线程 web-socket 客户端类,以便用户的(主)线程不会阻塞run_forever()
方法调用。代码似乎工作正常,除了最后,当我停止线程时,它不会干净地关闭 web-socket,我的进程也不会退出。我必须每次都做一个kill -9
来摆脱它。我试着调用线程的join()
方法以确保主线程等待子线程完成其执行,但这没有帮助。
代码如下所示。你能帮我优雅地退出/停止线程吗?
import thread
import threading
import time
import websocket
class WebSocketClient(threading.Thread):
def __init__(self, url):
self.url = url
threading.Thread.__init__(self)
def run(self):
# Running the run_forever() in a seperate thread.
#websocket.enableTrace(True)
self.ws = websocket.WebSocketApp(self.url,
on_message = self.on_message,
on_error = self.on_error,
on_close = self.on_close)
self.ws.on_open = self.on_open
self.ws.run_forever()
def send(self, data):
# Wait till websocket is connected.
while not self.ws.sock.connected:
time.sleep(0.25)
print 'Sending data...', data
self.ws.send("Hello %s" % data)
def stop(self):
print 'Stopping the websocket...'
self.ws.keep_running = False
def on_message(self, ws, message):
print 'Received data...', message
def on_error(self, ws, error):
print 'Received error...'
print error
def on_close(self, ws):
print 'Closed the connection...'
def on_open(self, ws):
print 'Opened the connection...'
if __name__ == "__main__":
wsCli = WebSocketClient("ws://localhost:8888/ws")
wsCli.start()
wsCli.send('Hello')
time.sleep(.1)
wsCli.send('World')
time.sleep(1)
wsCli.stop()
#wsCli.join()
print 'After closing client...'