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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/direct_sockets/stream_wrapper.h"
#include "base/notreached.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_throw_dom_exception.h"
#include "third_party/blink/renderer/core/dom/abort_signal.h"
#include "third_party/blink/renderer/core/dom/events/event_target_impl.h"
#include "third_party/blink/renderer/core/streams/readable_byte_stream_controller.h"
#include "third_party/blink/renderer/core/streams/readable_stream.h"
#include "third_party/blink/renderer/core/streams/underlying_byte_source_base.h"
#include "third_party/blink/renderer/core/streams/underlying_sink_base.h"
#include "third_party/blink/renderer/core/streams/underlying_source_base.h"
#include "third_party/blink/renderer/core/streams/writable_stream.h"
#include "third_party/blink/renderer/core/streams/writable_stream_default_controller.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
namespace blink {
namespace {
class ForwardingUnderlyingSource : public UnderlyingSourceBase {
public:
explicit ForwardingUnderlyingSource(
ReadableStreamDefaultWrapper* readable_stream_wrapper)
: UnderlyingSourceBase(readable_stream_wrapper->GetScriptState()),
readable_stream_wrapper_(readable_stream_wrapper) {}
ScriptPromise<IDLUndefined> Start(ScriptState* script_state) override {
readable_stream_wrapper_->SetController(Controller());
return ToResolvedUndefinedPromise(script_state);
}
ScriptPromise<IDLUndefined> Pull(ScriptState* script_state,
ExceptionState&) override {
readable_stream_wrapper_->Pull();
return ToResolvedUndefinedPromise(script_state);
}
ScriptPromise<IDLUndefined> Cancel(ScriptState* script_state,
ScriptValue reason,
ExceptionState&) override {
readable_stream_wrapper_->CloseStream();
return ToResolvedUndefinedPromise(script_state);
}
void Trace(Visitor* visitor) const override {
visitor->Trace(readable_stream_wrapper_);
UnderlyingSourceBase::Trace(visitor);
}
private:
const Member<ReadableStreamDefaultWrapper> readable_stream_wrapper_;
};
class ForwardingUnderlyingByteSource : public UnderlyingByteSourceBase {
public:
explicit ForwardingUnderlyingByteSource(
ReadableByteStreamWrapper* readable_stream_wrapper)
: readable_stream_wrapper_(readable_stream_wrapper) {}
ScriptPromise<IDLUndefined> Pull(ReadableByteStreamController* controller,
ExceptionState&) override {
DCHECK_EQ(readable_stream_wrapper_->Controller(), controller);
readable_stream_wrapper_->Pull();
return ToResolvedUndefinedPromise(GetScriptState());
}
ScriptPromise<IDLUndefined> Cancel() override {
readable_stream_wrapper_->CloseStream();
return ToResolvedUndefinedPromise(GetScriptState());
}
ScriptPromise<IDLUndefined> Cancel(v8::Local<v8::Value> reason) override {
return Cancel();
}
ScriptState* GetScriptState() override {
return readable_stream_wrapper_->GetScriptState();
}
void Trace(Visitor* visitor) const override {
visitor->Trace(readable_stream_wrapper_);
UnderlyingByteSourceBase::Trace(visitor);
}
private:
const Member<ReadableByteStreamWrapper> readable_stream_wrapper_;
};
class ForwardingUnderlyingSink : public UnderlyingSinkBase {
public:
explicit ForwardingUnderlyingSink(
WritableStreamWrapper* writable_stream_wrapper)
: writable_stream_wrapper_(writable_stream_wrapper) {}
ScriptPromise<IDLUndefined> start(ScriptState* script_state,
WritableStreamDefaultController* controller,
ExceptionState&) override {
class AbortAlgorithm final : public AbortSignal::Algorithm {
public:
explicit AbortAlgorithm(WritableStreamWrapper* writable_stream_wrapper)
: writable_stream_wrapper_(writable_stream_wrapper) {}
void Run() override { writable_stream_wrapper_->OnAbortSignal(); }
void Trace(Visitor* visitor) const override {
visitor->Trace(writable_stream_wrapper_);
Algorithm::Trace(visitor);
}
private:
Member<WritableStreamWrapper> writable_stream_wrapper_;
};
writable_stream_wrapper_->SetController(controller);
abort_handle_ = Controller()->signal()->AddAlgorithm(
MakeGarbageCollected<AbortAlgorithm>(writable_stream_wrapper_));
return ToResolvedUndefinedPromise(script_state);
}
ScriptPromise<IDLUndefined> write(ScriptState*,
ScriptValue chunk,
WritableStreamDefaultController* controller,
ExceptionState& exception_state) override {
DCHECK_EQ(writable_stream_wrapper_->Controller(), controller);
return writable_stream_wrapper_->Write(chunk, exception_state);
}
ScriptPromise<IDLUndefined> close(ScriptState* script_state,
ExceptionState&) override {
writable_stream_wrapper_->CloseStream();
abort_handle_.Clear();
return ToResolvedUndefinedPromise(script_state);
}
ScriptPromise<IDLUndefined> abort(ScriptState* script_state,
ScriptValue reason,
ExceptionState& exception_state) override {
return close(script_state, exception_state);
}
void Trace(Visitor* visitor) const override {
visitor->Trace(writable_stream_wrapper_);
visitor->Trace(abort_handle_);
UnderlyingSinkBase::Trace(visitor);
}
private:
const Member<WritableStreamWrapper> writable_stream_wrapper_;
Member<AbortSignal::AlgorithmHandle> abort_handle_;
};
} // namespace
StreamWrapper::StreamWrapper(ScriptState* script_state)
: script_state_(script_state) {}
StreamWrapper::~StreamWrapper() = default;
void StreamWrapper::Trace(Visitor* visitor) const {
visitor->Trace(script_state_);
}
ReadableStreamWrapper::ReadableStreamWrapper(ScriptState* script_state)
: StreamWrapper(script_state) {}
bool ReadableStreamWrapper::Locked() const {
return ReadableStream::IsLocked(readable_);
}
void ReadableStreamWrapper::Trace(Visitor* visitor) const {
visitor->Trace(readable_);
StreamWrapper::Trace(visitor);
}
ReadableStreamDefaultWrapper::ReadableStreamDefaultWrapper(
ScriptState* script_state)
: ReadableStreamWrapper(script_state) {}
void ReadableStreamDefaultWrapper::Trace(Visitor* visitor) const {
visitor->Trace(source_);
visitor->Trace(controller_);
ReadableStreamWrapper::Trace(visitor);
}
// static
UnderlyingSourceBase*
ReadableStreamDefaultWrapper::MakeForwardingUnderlyingSource(
ReadableStreamDefaultWrapper* readable_stream_wrapper) {
return MakeGarbageCollected<ForwardingUnderlyingSource>(
readable_stream_wrapper);
}
ReadableByteStreamWrapper::ReadableByteStreamWrapper(ScriptState* script_state)
: ReadableStreamWrapper(script_state) {}
void ReadableByteStreamWrapper::Trace(Visitor* visitor) const {
visitor->Trace(source_);
visitor->Trace(controller_);
ReadableStreamWrapper::Trace(visitor);
}
// static
UnderlyingByteSourceBase*
ReadableByteStreamWrapper::MakeForwardingUnderlyingByteSource(
ReadableByteStreamWrapper* readable_stream_wrapper) {
return MakeGarbageCollected<ForwardingUnderlyingByteSource>(
readable_stream_wrapper);
}
WritableStreamWrapper::WritableStreamWrapper(ScriptState* script_state)
: StreamWrapper(script_state) {}
bool WritableStreamWrapper::Locked() const {
return WritableStream::IsLocked(writable_.Get());
}
void WritableStreamWrapper::Trace(Visitor* visitor) const {
visitor->Trace(sink_);
visitor->Trace(writable_);
visitor->Trace(controller_);
StreamWrapper::Trace(visitor);
}
// static
UnderlyingSinkBase* WritableStreamWrapper::MakeForwardingUnderlyingSink(
WritableStreamWrapper* writable_stream_wrapper) {
return MakeGarbageCollected<ForwardingUnderlyingSink>(
writable_stream_wrapper);
}
} // namespace blink
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