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LibWeb: Implement '5.1. Headers class' from the Fetch API :^)

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Linus Groh 2022-07-19 00:19:24 +01:00
parent b5ab1f6b4a
commit ed49b66f25
9 changed files with 516 additions and 0 deletions
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55
Userland/Libraries/LibWeb/Fetch/HeadersIterator.cpp Normal file
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/*
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/IteratorOperations.h>
#include <LibWeb/Bindings/HeadersIteratorWrapper.h>
#include <LibWeb/Bindings/Wrapper.h>
#include <LibWeb/Fetch/HeadersIterator.h>
namespace Web::Fetch {
// https://webidl.spec.whatwg.org/#es-iterable, Step 2
JS::ThrowCompletionOr<JS::Object*> HeadersIterator::next()
{
auto& global_object = wrapper()->global_object();
auto& vm = global_object.vm();
// The value pairs to iterate over are the return value of running sort and combine with this’s header list.
auto value_pairs_to_iterate_over = [&]() -> JS::ThrowCompletionOr<Vector<Fetch::Infrastructure::Header>> {
auto headers_or_error = m_headers.m_header_list.sort_and_combine();
if (headers_or_error.is_error())
return vm.throw_completion<JS::InternalError>(global_object, JS::ErrorType::NotEnoughMemoryToAllocate);
return headers_or_error.release_value();
};
auto pairs = TRY(value_pairs_to_iterate_over());
if (m_index >= pairs.size())
return create_iterator_result_object(global_object, JS::js_undefined(), true);
auto const& pair = pairs[m_index++];
switch (m_iteration_kind) {
case JS::Object::PropertyKind::Key:
return create_iterator_result_object(global_object, JS::js_string(vm, StringView { pair.name }), false);
case JS::Object::PropertyKind::Value:
return create_iterator_result_object(global_object, JS::js_string(vm, StringView { pair.value }), false);
case JS::Object::PropertyKind::KeyAndValue: {
auto* array = JS::Array::create_from(global_object, { JS::js_string(vm, StringView { pair.name }), JS::js_string(vm, StringView { pair.value }) });
return create_iterator_result_object(global_object, array, false);
}
default:
VERIFY_NOT_REACHED();
}
}
void HeadersIterator::visit_edges(JS::Cell::Visitor& visitor)
{
visitor.visit(m_headers.wrapper());
}
}