Advice for a python newbie on parsing whois records?

Phillip B Oldham phillip.oldham at gmail.com
Wed Jun 11 18:29:23 CEST 2008


On Jun 10, 8:21 pm, Miki <miki.teb... at gmail.com> wrote:
> Hello,
>
> > Hi. I'm stretching my boundaries in programming with a little python
> > shell-script which is going to loop through a list of domain names,
> > grab the whois record, parse it, and put the results into a csv.
>
> > I've got the results coming back fine, but since I have *no*
> > experience with python I'm wondering what would be the preferred
> > "pythonic" way of parsing the whois string into a csv record.
>
> > Tips/thoughts/examples more than welcome!
>
> from os import popen
> import re
>
> find_record = re.compile("\s+([^:]+): (.*)\s*").match
> for line in popen("whois google.com"):
>     match = find_record(line)
>     if not match:
>         continue
>     print "%s --> %s" % (match.groups()[0], match.groups()[1])
>
> HTH,
> --
> Miki <miki.teb... at gmail.com>http://pythonwise.blogspot.com

OK, here's what I've got so far. I'm treating this as a learning
exercise, so the resulting file isn't so important as understanding
and thinking in python (although I believe the results are adequate
for my needs). I'd appreciate the community's comments as this is my
*first* attempt at python and has taken me a couple of hours
(including googling).

#!/usr/bin/env python
import subprocess
import re

src = open('./domains.txt')

dest = open('./whois.csv', 'w');

def trim( txt ):
	x = []
	for line in txt.split("\n"):
		if line.strip() == "":
			continue
		if line.strip().startswith('WHOIS'):
			continue
		if line.strip().startswith('>>>'):
			continue
		if line.strip().startswith('%'):
			continue
		if line.startswith("--"):
			return ''.join(x)
		x.append(" "+line)
	return "\n".join(x)

def clean( txt ):
	x = []
	isok = re.compile("^\s?([^:]+): ").match
	for line in txt.split("\n"):
		match = isok(line)
		if not match:
			continue
		x.append(line)
	return "\n".join(x);

def clean_co_uk( rec ):
	rec = rec.replace('Company number:', 'Company number -')
	rec = rec.replace("\n\n", "\n")
	rec = rec.replace("\n", "")
	rec = rec.replace(": ", ":\n")
	rec = re.sub("([^(][a-zA-Z']+\s?[a-zA-Z]*:\n)", "\n\g<0>", rec)
	rec = rec.replace(":\n", ": ")
	rec = re.sub("^[ ]+\n", "", rec)
	return rec

def clean_net( rec ):
	rec = rec.replace("\n\n", "\n")
	rec = rec.replace("\n", "")
	rec = rec.replace(": ", ":\n")
	rec = re.sub("([a-zA-Z']+\s?[a-zA-Z]*:\n)", "\n\g<0>", rec)
	rec = rec.replace(":\n", ": ")
	return rec

def clean_info( rec ):
	x = []
	for line in rec.split("\n"):
		x.append(re.sub("^([^:]+):", "\g<0> ", line))
	return "\n".join(x)

def record(domain, record):

	## Records are as follows: [ domain, registrant, registrant's address
registrar, type, registered, renewal, updated name servers ]
	details = ['','','','','','','','','']
	for k, v in record.items():
		try:
			details[0] = domain.lower()
			result = {
				"registrant": lambda: 1,
				"registrant name": lambda: 1,
				"registrant type": lambda: 4,
				"registrant's address": lambda: 2,
				"registrant address1": lambda: 2,
				"registrar": lambda: 3,
				"sponsoring registrar": lambda: 3,
				"registered on": lambda: 5,
				"registered": lambda: 5,
				"domain registeration date": lambda: 5,
				"renewal date": lambda: 6,
				"last updated": lambda: 7,
				"domain last updated date": lambda: 7,
				"name servers": lambda: 8,
				"name server": lambda: 8,
				"nameservers": lambda: 8,
				"updated date": lambda: 7,
				"creation date": lambda: 5,
				"expiration date": lambda: 6,
				"domain expiration date": lambda: 6,
				"administrative contact": lambda: 2
			}[k.lower()]()
			if v != '':
				details[result] = v
		except:
			continue

	dest.write('|'.join(details)+"\n")

## Loop through domains
for domain in src:

	domain = domain.strip()

	if domain == '':
		continue

	rec = subprocess.Popen(["whois",domain],
stdout=subprocess.PIPE).communicate()[0]

	if rec.startswith("No whois server") == True:
		continue

	if rec.startswith("This TLD has no whois server") == True:
		continue

	rec = trim(rec)

	if domain.endswith(".net"):
		rec = clean_net(rec)

	if domain.endswith(".com"):
		rec = clean_net(rec)

	if domain.endswith(".tv"):
		rec = clean_net(rec)

	if domain.endswith(".co.uk"):
		rec = clean_co_uk(rec)

	if domain.endswith(".info"):
		rec = clean_info(rec)

	rec = clean(rec)

	details = {}

	try:
		for line in rec.split("\n"):
			bits = line.split(': ')
			a = bits.pop(0)
			b = bits.pop(0)
			details[a.strip()] = b.strip().replace("\t", ", ")
	except:
		continue

	record(domain, details)

src.close()
dest.close()



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