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LibURL: Correctly acquire the registrable domain for a URL

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We were using the public suffix of the URL's host as its registrable
domain. But the registrable domain is actually the public suffix plus
one additional label.
This commit is contained in:
Timothy Flynn 2025-03-09 11:11:35 -04:00 • committed by Jelle Raaijmakers
commit a34f7a5bd1
Notes: github-actions[bot] 2025-03-11 11:11:58 +00:00
4 changed files with 75 additions and 1 deletions
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Libraries/LibURL/Host.cpp
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@ -220,7 +220,7 @@ Optional<String> Host::registrable_domain() const
// 3. Let registrableDomain be the registrable domain determined by running the Public Suffix List algorithm with host as domain. [PSL]
// NOTE: The spec algorithm for the public suffix returns "*" by default, but get_public_suffix() returns an empty Optional.
// Remove the `value_or()` if and when we update it.
auto registrable_domain = get_public_suffix(host_string).value_or("*"_string);
auto registrable_domain = get_registrable_domain(host_string).value_or("*"_string);
// 4. Assert: registrableDomain is an ASCII string that does not end with ".".
VERIFY(all_of(registrable_domain.code_points(), is_ascii));