如何在Python中停止套接字线程?

时间:2013-12-02 15:21:00

标签: python multithreading sockets

在Python 3.3.3中,我创建了一个线程来监听与socket的连接。它喜欢这个:

import threading
import socket
import time

Host = ''
Port = 50000

flag = False

class ServerThread(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    def run(self):
        try:
            self._sock.bind((Host, Port))
            self._sock.listen(5)
            while True:
                conn, addr = self._sock.accept()
                print('Connected by', addr)
        except socket.error as msg:
            print(msg)
        except Exception as e:
            print(str(e))
        finally:
            self._sock.close()
    def exit(self):
        self._sock.close()

def TargetFunc(vlock):
    vlock.acquire()
    flag = True
    vlock.release()

def main():
    sthread = ServerThread()
    sthread.start()
    vlock = threading.Lock()
    time.sleep(10)
    vthread = threading.Thread(target = TargetFunc, args = (vlock, ))
    vthread.start()
    while True:
        vlock.acquire()
        if flag:
            sthread.exit()
            vlock.release()
            break
        vlock.release()
    sthread.join()
    vthread.join()

if __name__ == '__main__':
    main()

有两个线程,一个是侦听套接字,另一个是设置标志。当标志为True时,关闭套接字,然后引发套接字错误并捕获它,因此监听套接字终止。但是为什么它不起作用。

谢谢!

1 个答案:

答案 0 :(得分:3)

self._sock.accept()正在阻止。所以它会等到有人连接。您应该使用非阻塞变体(或阻止但具有超时)。这样你就可以检查退出条件了。

或者,您可以在ServerThread中强制执行异常。