Python网络编程——设定并获取默认的套接字超时时间

Sometimes，you need to manipulate the default values of certain properties of a socket library, for example, the socket timeout.

设定并获取默认的套接字超时时间。

1.代码

 1 import socket
 2
 3
 4 def test_socket_timeout():
 5     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 6     print("Default socket timeout: %s" % s.gettimeout())
 7     # 获取套接字默认超时时间
 8     s.settimeout(100)
 9         # 设置超时时间
10     print("Current socket timeout: %s" % s.gettimeout())
11     # 读取修改后的套接字超时时间
12
13
14 if __name__ == ‘__main__‘:
15     test_socket_timeout()

2. AF_INET和SOCK_STREAM解释

1     # 地址簇
2     # socket.AF_INET IPv4(默认)
3     # socket.AF_INET6 IPv6
4     # socket.AF_UNIX 只能够用于单一的Unix系统进程间通信
5
6     # socket.SOCK_STREAM(数据流) 提供面向连接的稳定数据传输，即TCP/IP协议.多用于资料（如文件）传送。

3.gettimeout()和settimeout()解释

 1 def gettimeout(self):  # real signature unknown; restored from __doc__
 2     """
 3     gettimeout() -> timeout
 4
 5     Returns the timeout in seconds (float) associated with socket
 6     operations. A timeout of None indicates that timeouts on socket
 7     operations are disabled.
 8     """
 9     return timeout
10
11
12 def settimeout(self, timeout):  # real signature unknown; restored from __doc__
13     """
14     settimeout(timeout)
15
16     Set a timeout on socket operations.  ‘timeout‘ can be a float,
17     giving in seconds, or None.  Setting a timeout of None disables
18     the timeout feature and is equivalent to setblocking(1).
19     Setting a timeout of zero is the same as setblocking(0).
20     """
21     pass
22 # 设置套接字操作的超时期，timeout是一个浮点数，单位是秒。值为None表示没有超时期。
23 # 一般，超时期应该在刚创建套接字时设置，因为它们可能用于连接的操作（如 client 连接最多等待5s ）

4.运行结果

1 Default socket timeout: None
2 Current socket timeout: 100.0