Python program to fetch domain whois data using...

转自 http://www.binarytides.com/python-program-to-fetch-domain-whois-data-using-sockets/

Whois

The whois information of a domain name provides various details like registrar, owner, registration date, expiry date etc. The whois information is provided by the corresponding whois servers of the registrars. The first step is to contact whois.iana.org which provides the actual whois server of a domain name. Next the particular whois server is contacted which provides the full whois data of the domain.

Implementation is quite simple and python makes it even simpler.

#!/usr/bin/python

'''
Program to fetch whois information of a domain name
Silver Moon
[email protected]
'''
import socket, sys

#Perform a generic whois query to a server and get the reply
def perform_whois(server , query) :
    #socket connection
    s = socket.socket(socket.AF_INET , socket.SOCK_STREAM)
    s.connect((server , 43))

    #send data
    s.send(query + '\r\n')

    #receive reply
    msg = ''
    while len(msg) < 10000:
        chunk = s.recv(100)
        if(chunk == ''):
            break
        msg = msg + chunk

    return msg
#End

#Function to perform the whois on a domain name
def get_whois_data(domain):

    #remove http and www
    domain = domain.replace('http://','')
    domain = domain.replace('www.','')

    #get the extension , .com , .org , .edu
    ext = domain[-3:]

    #If top level domain .com .org .net
    if(ext == 'com' or ext == 'org' or ext == 'net'):
        whois = 'whois.internic.net'
        msg = perform_whois(whois , domain)

        #Now scan the reply for the whois server
        lines = msg.splitlines()
        for line in lines:
            if ':' in line:
                words = line.split(':')
                if  'Whois' in words[0] and 'whois.' in words[1]:
                    whois = words[1].strip()
                    break;

    #Or Country level - contact whois.iana.org to find the whois server of a particular TLD
    else:
        #Break again like , co.uk to uk
        ext = domain.split('.')[-1]

        #This will tell the whois server for the particular country
        whois = 'whois.iana.org'
        msg = perform_whois(whois , ext)

        #Now search the reply for a whois server
        lines = msg.splitlines()
        for line in lines:
            if ':' in line:
                words = line.split(':')
                if 'whois.' in words[1] and 'Whois Server (port 43)' in words[0]:
                    whois = words[1].strip()
                    break;

    #Now contact the final whois server
    msg = perform_whois(whois , domain)

    #Return the reply
    return msg
# end

# get the domain name from command line argument
domain_name = sys.argv[1]
print get_whois_data(domain_name)

Run the program by issuing the following command at the terminal.

$ python whois.py stackoverflow.com

The commandline argument should contain the domain name. The output would be the whois data.