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Python：如何从FQDN获取IP地址

pythonnetwork-programmingip-address
5

如果我有一个完全限定域名（FQDN），例如www.google.com，我该如何获取相应的IP地址？

3个回答
7
最简单的方法是使用 socket.gethostbyname()。该函数可以帮助您获取主机名对应的IP地址。
6
你可以使用socket.getaddrinfo。它会为你提供与名称相关联的不同IP地址，并且还可以提供IPv6地址。
从文档中得知：
>>> import socket
>>> help(socket.getaddrinfo)
Help on built-in function getaddrinfo in module _socket:

getaddrinfo(...)
    getaddrinfo(host, port [, family, socktype, proto, flags])
        -> list of (family, socktype, proto, canonname, sockaddr)

    Resolve host and port into addrinfo struct.
>>> from pprint import pprint
>>> pprint(socket.getaddrinfo('www.google.com', 80))
[(2, 1, 6, '', ('74.125.230.83', 80)),
 (2, 2, 17, '', ('74.125.230.83', 80)),
 (2, 3, 0, '', ('74.125.230.83', 80)),
 (2, 1, 6, '', ('74.125.230.80', 80)),
 (2, 2, 17, '', ('74.125.230.80', 80)),
 (2, 3, 0, '', ('74.125.230.80', 80)),
 (2, 1, 6, '', ('74.125.230.81', 80)),
 (2, 2, 17, '', ('74.125.230.81', 80)),
 (2, 3, 0, '', ('74.125.230.81', 80)),
 (2, 1, 6, '', ('74.125.230.84', 80)),
 (2, 2, 17, '', ('74.125.230.84', 80)),
 (2, 3, 0, '', ('74.125.230.84', 80)),
 (2, 1, 6, '', ('74.125.230.82', 80)),
 (2, 2, 17, '', ('74.125.230.82', 80)),
 (2, 3, 0, '', ('74.125.230.82', 80))]

注意：在C语言中gethostbyname已经被弃用（Python的socket.gethostbyname也是用它实现的），因为它不支持IPv6地址，getaddrinfo是推荐的替代方案。
0
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