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

 import socket

 def test_socket_timeout():
     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     print("Default socket timeout: %s" % s.gettimeout())
     # 获取套接字默认超时时间
     s.settimeout(100)
         # 设置超时时间
     print("Current socket timeout: %s" % s.gettimeout())
     # 读取修改后的套接字超时时间

 if __name__ == '__main__':
     test_socket_timeout()

2. AF_INET和SOCK_STREAM解释

     # 地址簇
     # socket.AF_INET IPv4(默认)
     # socket.AF_INET6 IPv6
     # socket.AF_UNIX 只能够用于单一的Unix系统进程间通信

     # 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

 def gettimeout(self):  # real signature unknown; restored from __doc__
     """
     gettimeout() -> timeout

     Returns the timeout in seconds (float) associated with socket
     operations. A timeout of None indicates that timeouts on socket
     operations are disabled.
     """
     return timeout

 def settimeout(self, timeout):  # real signature unknown; restored from __doc__
     """
     settimeout(timeout)

     Set a timeout on socket operations.  'timeout' can be a float,
     giving in seconds, or None.  Setting a timeout of None disables
     the timeout feature and is equivalent to setblocking(1).
     Setting a timeout of zero is the same as setblocking(0).
     """
     pass
 # 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。
 # 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

 Default socket timeout: None
 Current socket timeout: 100.0