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https://github.com/LadybirdBrowser/ladybird.git
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d08d6b08d3
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.
107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
/*
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* Copyright (c) 2022, Andrew Kaster <akaster@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/FlyString.h>
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#include <AK/Forward.h>
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#include <AK/HashMap.h>
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#include <LibGC/Heap.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/Runtime/VM.h>
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#define WEB_SET_PROTOTYPE_FOR_INTERFACE_WITH_CUSTOM_NAME(interface_class, interface_name) \
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do { \
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static auto name = #interface_name##_fly_string; \
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if (!shape().prototype()) { \
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set_prototype(&Bindings::ensure_web_prototype<Bindings::interface_class##Prototype>(realm, name)); \
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} \
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} while (0)
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#define WEB_SET_PROTOTYPE_FOR_INTERFACE(interface_name) WEB_SET_PROTOTYPE_FOR_INTERFACE_WITH_CUSTOM_NAME(interface_name, interface_name)
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namespace Web::Bindings {
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class Intrinsics final : public JS::Cell {
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GC_CELL(Intrinsics, JS::Cell);
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GC_DECLARE_ALLOCATOR(Intrinsics);
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public:
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Intrinsics(JS::Realm& realm)
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: m_realm(realm)
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{
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}
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template<typename NamespaceType>
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JS::Object& ensure_web_namespace(FlyString const& namespace_name)
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{
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if (auto it = m_namespaces.find(namespace_name); it != m_namespaces.end())
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return *it->value;
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create_web_namespace<NamespaceType>(*m_realm);
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return *m_namespaces.find(namespace_name)->value;
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}
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template<typename PrototypeType>
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JS::Object& ensure_web_prototype(FlyString const& class_name)
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{
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if (auto it = m_prototypes.find(class_name); it != m_prototypes.end())
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return *it->value;
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create_web_prototype_and_constructor<PrototypeType>(*m_realm);
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return *m_prototypes.find(class_name)->value;
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}
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template<typename PrototypeType>
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JS::NativeFunction& ensure_web_constructor(FlyString const& class_name)
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{
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if (auto it = m_constructors.find(class_name); it != m_constructors.end())
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return *it->value;
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create_web_prototype_and_constructor<PrototypeType>(*m_realm);
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return *m_constructors.find(class_name)->value;
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}
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template<typename PrototypeType>
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bool is_interface_exposed(JS::Realm&) const;
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private:
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virtual void visit_edges(JS::Cell::Visitor&) override;
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template<typename NamespaceType>
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void create_web_namespace(JS::Realm& realm);
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template<typename PrototypeType>
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void create_web_prototype_and_constructor(JS::Realm& realm);
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HashMap<FlyString, GC::Ref<JS::Object>> m_namespaces;
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HashMap<FlyString, GC::Ref<JS::Object>> m_prototypes;
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HashMap<FlyString, GC::Ptr<JS::NativeFunction>> m_constructors;
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GC::Ref<JS::Realm> m_realm;
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};
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Intrinsics& host_defined_intrinsics(JS::Realm& realm);
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template<typename T>
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[[nodiscard]] JS::Object& ensure_web_namespace(JS::Realm& realm, FlyString const& namespace_name)
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{
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return host_defined_intrinsics(realm).ensure_web_namespace<T>(namespace_name);
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}
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template<typename T>
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[[nodiscard]] JS::Object& ensure_web_prototype(JS::Realm& realm, FlyString const& class_name)
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{
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return host_defined_intrinsics(realm).ensure_web_prototype<T>(class_name);
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}
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template<typename T>
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[[nodiscard]] JS::NativeFunction& ensure_web_constructor(JS::Realm& realm, FlyString const& class_name)
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{
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return host_defined_intrinsics(realm).ensure_web_constructor<T>(class_name);
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}
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}
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