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LibWeb: Use enum for serialization and reimplement interface exposure

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Our currently implementation of structured serialization has a design
flaw, where if the serialized/transferred type was not used in the
destination realm, it would not be seen as exposed and thus we would
not re-create the type on the other side.

This is very common, for example, transferring a MessagePort to a just
inserted iframe, or the just inserted iframe transferring a MessagePort
to it's parent. This is what Google reCAPTCHA does.

This flaw occurred due to relying on lazily populated HashMaps of
constructors, namespaces and interfaces. This commit changes it so that
per-type "is exposed" implementations are generated.

Since it no longer relies on interface name strings, this commit
changes serializable types to indicate their type with an enum,
in line with how transferrable types indicate their type.

This makes Google reCAPTCHA work on https://www.google.com/recaptcha/api2/demo
It currently doesn't work on non-Google origins due to a separate
same-origin policy bug.
This commit is contained in:
Luke Wilde 2025-07-14 17:15:09 +01:00 • committed by Tim Flynn
parent d6b9bd306c
commit d08d6b08d3
Notes: github-actions[bot] 2025-07-15 13:21:14 +00:00
25 changed files with 356 additions and 130 deletions
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2
Libraries/LibWeb/Geometry/DOMPointReadOnly.h
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@ -44,7 +44,7 @@ public:
WebIDL::ExceptionOr<GC::Ref<DOMPoint>> matrix_transform(DOMMatrixInit&) const;
virtual StringView interface_name() const override { return "DOMPointReadOnly"sv; }
virtual HTML::SerializeType serialize_type() const override { return HTML::SerializeType::DOMPointReadOnly; }
virtual WebIDL::ExceptionOr<void> serialization_steps(HTML::SerializationRecord&, bool for_storage, HTML::SerializationMemory&) override;
virtual WebIDL::ExceptionOr<void> deserialization_steps(ReadonlySpan<u32> const&, size_t& position, HTML::DeserializationMemory&) override;