Question

我目前正在尝试了解Python中的套接字，并且我使用以下代码从热点网络上的智能手机接收通过TCP传输的数据。

import socket
import logging

# Logging routine
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Bind the socket to the port
server_address = ('localhost', 5000)
logger.info('starting up on %s port %s' % server_address)
sock.bind(server_address)

# Listen for incoming connections
sock.listen(1)

# Wait for a connection
logger.info('waiting for a connection')
connection, client_address = sock.accept()

try:
    logger.info('connection from', client_address)

    while True:
        data = connection.recv(16)

        if data:
            print 'Do stuff here'
        else:
            print 'no more data from', client_address
            break

finally:
    # Clean up the connection
    connection.close()

我第一次运行代码时一切正常。运行脚本并想再次运行后，我出现以下错误：[Errno 48] Address already in use?。但是，如果我在程序崩溃后再次运行脚本，则一切正常。我已检查并确认它以connection.close()的finally语句结束。似乎我总是运行程序两次才能连续运行两次。

Answer 1

这是因为上一次执行使套接字处于TIME_WAIT状态，无法立即重用。

为了防止这种情况，请设置socket.SO_REUSEADDR：

更改

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

到

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR, 1)

奇怪的Errno 48地址已经在使用行为python

1 个答案: