Python使用Whois协议查询域名、IP地址信息

原文地址：http://shajunxing.tpddns.cn:8888/web/blog/2018-04-17-Python使用Whois协议查询域名、IP地址信息/index.html

问题由来

我想查询某个IP地址所属的运营商，于是在百度里搜索，得到了结果，而且告诉我是从http://www.ip138.com/获取的。进入该网站，得知最原始出处是https://www.apnic.net/，即亚太互联网络信息中心，世界五大因特网登记机构之一。

查看APNIC的帮助https://www.apnic.net/manage-ip/using-whois/得知它是提供Whois服务的。Whois是老牌因特网协议了，以前听说过，今天研究了一下发现非常简单：协议基于TCP，端口43，客户端连接服务器发送命令和CR、LF，然后服务器返回响应内容并关闭连接。命令和响应都是纯文本格式的，可以直接阅读。这也体现了因特网协议的可读性的设计原则（当然现在的Google之类的没有内涵的公司肯定是不遵循的啦）。

我在Windows下面用Telnet试了一下，貌似有些问题，命令总是发不完整，于是用Python试验，成功了。

Python代码

代码如下，注意接收的时候必须使用循环，哪怕缓冲区再大，也不一定能够一次收完。

import socket

if __name__ == '__main__':
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect(('whois.apnic.net', 43))
    # 江苏电信DNS地址
    s.send(b'222.191.251.125\r\n')
    result = bytearray()
    while True:
        data = s.recv(10000)
        if not len(data):
            break
        result.extend(data)
    s.close()
    print(bytes(result).decode('ascii'))

返回可读的信息如下，需要什么解析字符串就是了。

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to '222.184.0.0 - 222.191.255.255'

% Abuse contact for '222.184.0.0 - 222.191.255.255' is '[email protected]'

inetnum:        222.184.0.0 - 222.191.255.255
netname:        CHINANET-JS
descr:          CHINANET jiangsu province network
descr:          China Telecom
descr:          A12,Xin-Jie-Kou-Wai Street
descr:          Beijing 100088
country:        CN
admin-c:        CH93-AP
tech-c:         CJ186-AP
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CHINANET-JS
mnt-routes:     MAINT-CHINANET-JS
remarks:        This object can only modify by APNIC hostmaster
remarks:        If you wish to modify this object details please
remarks:        send email to [email protected] with your
remarks:        organisation account name in the subject line.
status:         ALLOCATED PORTABLE
last-modified:  2015-08-26T01:26:56Z
source:         APNIC
mnt-irt:        IRT-CHINANET-CN

irt:            IRT-CHINANET-CN
address:        No.31 ,jingrong street,beijing
address:        100032
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CH93-AP
tech-c:         CH93-AP
auth:           # Filtered
mnt-by:         MAINT-CHINANET
last-modified:  2010-11-15T00:31:55Z
source:         APNIC

role:           CHINANET JIANGSU
address:        260 Zhongyang Road,Nanjing 210037
country:        CN
phone:          +86-25-86588231
phone:          +86-25-86588745
fax-no:         +86-25-86588104
e-mail:         [email protected]
remarks:        send anti-spam reports to [email protected]
remarks:        send abuse reports to [email protected]
remarks:        times in GMT+8
admin-c:        CH360-AP
tech-c:         CS306-AP
tech-c:         CN142-AP
nic-hdl:        CJ186-AP
remarks:        www.jsinfo.net
notify:         [email protected]
mnt-by:         MAINT-CHINANET-JS
last-modified:  2011-12-06T02:58:51Z
source:         APNIC

person:         Chinanet Hostmaster
nic-hdl:        CH93-AP
e-mail:         [email protected]
address:        No.31 ,jingrong street,beijing
address:        100032
phone:          +86-10-58501724
fax-no:         +86-10-58501724
country:        CN
mnt-by:         MAINT-CHINANET
last-modified:  2014-02-27T03:37:38Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-NODE3)

参考文献

• RFC 812 - NICNAME/WHOIS
• RFC 954 - NICNAME/WHOIS
• RFC 3912 - WHOIS Protocol Specification