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LibWeb: Implement ReadableByteStreamController.close()

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Matthew Olsson 2023-04-09 10:40:15 -07:00 • committed by Andreas Kling
parent ef3810d03d
commit c9be755367
5 changed files with 71 additions and 1 deletions
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19
Userland/Libraries/LibWeb/Streams/ReadableByteStreamController.cpp
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@ -18,6 +18,25 @@ Optional<double> ReadableByteStreamController::desired_size() const
return readable_byte_stream_controller_get_desired_size(*this);
}
// https://streams.spec.whatwg.org/#rbs-controller-close
WebIDL::ExceptionOr<void> ReadableByteStreamController::close()
{
// 1. If this.[[closeRequested]] is true, throw a TypeError exception.
if (m_close_requested)
return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Controller is already closed"sv };
// 2. If this.[[stream]].[[state]] is not "readable", throw a TypeError exception.
if (m_stream->state() != ReadableStream::State::Readable) {
auto message = m_stream->state() == ReadableStream::State::Closed ? "Cannot close a closed stream"sv : "Cannot close an errored stream"sv;
return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, message };
}
// 3. Perform ? ReadableByteStreamControllerClose(this).
TRY(readable_byte_stream_controller_close(*this));
return {};
}
ReadableByteStreamController::ReadableByteStreamController(JS::Realm& realm)
: Bindings::PlatformObject(realm)
{