#!/usr/bin/python3
import re
import urllib.request
from sys import argv
script, url, filename = argv

with urllib.request.urlopen(url) as resp:
  page = resp.read()
with open(filename, "w") as f:
  f.write('\n'.join(re.findall("(?:(?:https?|ftp):\/\/)?[\w/\-?=%.]+\.[\w/\-?=%.]+", str(page))))