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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.
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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* Copyright (c) 2022-2024, Kenneth Myhra <kennethmyhra@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/NonnullRefPtr.h>
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#include <AK/Vector.h>
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#include <LibWeb/Bindings/BlobPrototype.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/Bindings/Serializable.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::FileAPI {
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using BlobPart = Variant<GC::Root<WebIDL::BufferSource>, GC::Root<Blob>, String>;
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struct BlobPropertyBag {
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String type = String {};
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Bindings::EndingType endings;
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};
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[[nodiscard]] ErrorOr<String> convert_line_endings_to_native(StringView string);
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[[nodiscard]] ErrorOr<ByteBuffer> process_blob_parts(Vector<BlobPart> const& blob_parts, Optional<BlobPropertyBag> const& options = {});
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[[nodiscard]] bool is_basic_latin(StringView view);
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class Blob
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: public Bindings::PlatformObject
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, public Bindings::Serializable {
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WEB_PLATFORM_OBJECT(Blob, Bindings::PlatformObject);
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GC_DECLARE_ALLOCATOR(Blob);
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public:
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virtual ~Blob() override;
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[[nodiscard]] static GC::Ref<Blob> create(JS::Realm&, ByteBuffer, String type);
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[[nodiscard]] static GC::Ref<Blob> create(JS::Realm&, Optional<Vector<BlobPart>> const& blob_parts = {}, Optional<BlobPropertyBag> const& options = {});
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static WebIDL::ExceptionOr<GC::Ref<Blob>> construct_impl(JS::Realm&, Optional<Vector<BlobPart>> const& blob_parts = {}, Optional<BlobPropertyBag> const& options = {});
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// https://w3c.github.io/FileAPI/#dfn-size
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u64 size() const { return m_byte_buffer.size(); }
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// https://w3c.github.io/FileAPI/#dfn-type
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String const& type() const { return m_type; }
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WebIDL::ExceptionOr<GC::Ref<Blob>> slice(Optional<i64> start = {}, Optional<i64> end = {}, Optional<String> const& content_type = {});
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GC::Ref<Streams::ReadableStream> stream();
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GC::Ref<WebIDL::Promise> text();
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GC::Ref<WebIDL::Promise> array_buffer();
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GC::Ref<WebIDL::Promise> bytes();
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ReadonlyBytes raw_bytes() const { return m_byte_buffer.bytes(); }
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GC::Ref<Streams::ReadableStream> get_stream();
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virtual HTML::SerializeType serialize_type() const override { return HTML::SerializeType::Blob; }
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virtual WebIDL::ExceptionOr<void> serialization_steps(HTML::SerializationRecord& record, bool for_storage, HTML::SerializationMemory&) override;
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virtual WebIDL::ExceptionOr<void> deserialization_steps(ReadonlySpan<u32> const& record, size_t& position, HTML::DeserializationMemory&) override;
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protected:
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Blob(JS::Realm&, ByteBuffer, String type);
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Blob(JS::Realm&, ByteBuffer);
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virtual void initialize(JS::Realm&) override;
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WebIDL::ExceptionOr<GC::Ref<Blob>> slice_blob(Optional<i64> start = {}, Optional<i64> end = {}, Optional<String> const& content_type = {});
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ByteBuffer m_byte_buffer {};
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String m_type {};
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private:
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explicit Blob(JS::Realm&);
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};
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}
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