Created
November 13, 2017 15:51
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| _roots = None | |
| def roots_level_domains(): | |
| global _roots | |
| if _roots is not None: | |
| return _roots | |
| # get https://publicsuffix.org/list/effective_tld_names.dat | |
| rld = [] | |
| with open('effective_tld_names.dat', 'rb') as f: | |
| for l in f: | |
| ul = l.strip().decode('UTF-8') | |
| if ul and not ul.startswith(u'//'): | |
| rld += [list(reversed(ul.split('.')))] | |
| _roots = dict() | |
| for parts in rld: | |
| curr = _roots | |
| for p in parts: | |
| if p == '*': | |
| curr['valid'] = True | |
| if p not in curr: | |
| curr[p] = dict() | |
| curr = curr[p] | |
| curr['valid'] = True | |
| return _roots | |
| def rld(host): | |
| parts = list(reversed(host.split('.'))) | |
| roots = roots_level_domains() | |
| res = [] | |
| curr = roots | |
| for p in parts: | |
| subs = curr.get(p, {}) | |
| if subs == {}: | |
| subs = curr.get('*', {}) | |
| if subs.get('valid', False): | |
| res += [p] | |
| else: | |
| return '.'.join(reversed(res)) | |
| curr = subs |
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