Example fuzzy Public Suffix List matching

fuzzy_public_suffix_list_matching.py

def parse(domain, psl):
  fuzzy_hosts = ('www', 'mobile', 'm')
  domain_parts = domain.split('.')
  if domain_parts[0] in fuzzy_hosts:
    domain_parts = domain_parts[1:]
  if '.'.join(domain_parts[1:]) in psl:
    return sorted(['.'.join(domain_parts)] + \
        ['.'.join([fuzzy_host] + domain_parts) for fuzzy_host in fuzzy_hosts])
  else:
    return sorted([domain])

psl = ['org', 'co.uk']
assert parse('chromium.org', psl) == ['chromium.org', 'm.chromium.org', 'mobile.chromium.org', 'www.chromium.org']
assert parse('m.chromium.org', psl) == ['chromium.org', 'm.chromium.org', 'mobile.chromium.org', 'www.chromium.org']
assert parse('mobile.chromium.org', psl) == ['chromium.org', 'm.chromium.org', 'mobile.chromium.org', 'www.chromium.org']
assert parse('www.chromium.org', psl) == ['chromium.org', 'm.chromium.org', 'mobile.chromium.org', 'www.chromium.org']
assert parse('dev.chromium.org', psl) == ['dev.chromium.org']
assert parse('www.google.co.uk', psl) == ['google.co.uk', 'm.google.co.uk', 'mobile.google.co.uk', 'www.google.co.uk']
assert parse('nothing.google.co.uk', psl) == ['nothing.google.co.uk']