Python服务器“通常仅允许每个套接字地址的一次使用” [英] Python server "Only one usage of each socket address is normally permitted"
问题描述
从套接字import *
serverName =localhost
serverPort = 4444
BUFFER_SIZE = 1024
s = socket(AF_INET,SOCK_STREAM)
s.bind((serverName,serverPort))
s.listen 1)
print服务器已准备好接收数据...
while 1:
newConnection,client = s.accept()
msg = newConnection.recv(BUFFER_SIZE)
打印msg
newConnection.send(hello world)
newConnection.close()
<有时这似乎工作得很好(如果我将浏览器指向localhost:4444服务器打印出HTTP GET请求并且网页打印文本hello world)。但是,当我在最近几分钟关闭服务器后尝试启动服务器时,偶尔会出现以下错误消息: 跟踪(最近最后调用):
文件path\server.py,第8行,在< module>
s.bind((serverName,serverPort))
文件C:\Python27\lib\socket.py,第224行,在meth
中return getattr(self._sock ,name)(* args)
错误:[Errno 10048]通常允许每个套接字地址(协议/网络地址/端口)只使用一次
我使用Windows 7在python中编程。有关如何修复此问题的任何想法?
解决方案在调用bind()之前启用 SO_REUSEADDR 套接字选项。这允许地址/端口立即被重用,而不是在TIME_WAIT状态中停留几分钟,等待后来的数据包到达。
s.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)
I'm trying to create a very basic server in python that listens in on a port, creates a TCP connection when a client tries to connect, receives data, sends something back, then listens again (and repeats the process indefinitely). This is what I have so far:
from socket import *
serverName = "localhost"
serverPort = 4444
BUFFER_SIZE = 1024
s = socket(AF_INET, SOCK_STREAM)
s.bind((serverName, serverPort))
s.listen(1)
print "Server is ready to receive data..."
while 1:
newConnection, client = s.accept()
msg = newConnection.recv(BUFFER_SIZE)
print msg
newConnection.send("hello world")
newConnection.close()
Sometimes this seems to work perfectly well (if I point my browser to "localhost:4444" the server prints out the HTTP GET request and the webpage print the text "hello world"). But I'm getting the following error message sporadically when I try to start the server after closing it in the last few minutes:
Traceback (most recent call last):
File "path\server.py", line 8, in <module>
s.bind((serverName, serverPort))
File "C:\Python27\lib\socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
error: [Errno 10048] Only one usage of each socket address (protocol/network address/port) is normally permitted
I'm programming in python using Windows 7. Any ideas on how to fix this?
解决方案 Enable the SO_REUSEADDR socket option before calling bind(). This allows the address/port to be reused immediately instead of it being stuck in the TIME_WAIT state for several minutes, waiting for late packets to arrive.
s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
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