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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.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_DIRECT_SOCKETS_STREAM_WRAPPER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_DIRECT_SOCKETS_STREAM_WRAPPER_H_
#include "third_party/blink/renderer/core/streams/readable_byte_stream_controller.h"
#include "third_party/blink/renderer/core/streams/readable_stream_default_controller_with_script_scope.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_default_controller.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "v8/include/v8.h"
namespace blink {
class ExceptionState;
class ReadableStream;
class WritableStream;
class ScriptValue;
class ScriptState;
class MODULES_EXPORT StreamWrapper : public GarbageCollectedMixin {
public:
using CloseOnceCallback =
base::OnceCallback<void(v8::Local<v8::Value> exception, int net_error)>;
enum class State { kOpen, kAborted, kClosed, kGracefullyClosing };
explicit StreamWrapper(ScriptState*);
virtual ~StreamWrapper();
State GetState() const { return state_; }
ScriptState* GetScriptState() const { return script_state_.Get(); }
// Checks whether associated stream is locked to a reader/writer.
virtual bool Locked() const = 0;
virtual void CloseStream() = 0;
virtual void ErrorStream(int32_t error_code) = 0;
void Trace(Visitor* visitor) const override;
protected:
void SetState(State state) { state_ = state; }
private:
const Member<ScriptState> script_state_;
State state_ = State::kOpen;
};
class ReadableStreamWrapper : public StreamWrapper {
public:
ReadableStream* Readable() const { return readable_.Get(); }
// Checks whether |readable_| is locked to a reader.
bool Locked() const override;
// Implements UnderlyingSource::pull(...)
virtual void Pull() = 0;
void Trace(Visitor*) const override;
protected:
explicit ReadableStreamWrapper(ScriptState*);
void SetReadable(ReadableStream* readable) { readable_ = readable; }
private:
Member<ReadableStream> readable_;
};
class ReadableStreamDefaultWrapper : public ReadableStreamWrapper {
public:
using ControllerType = ReadableStreamDefaultControllerWithScriptScope;
void Trace(Visitor*) const override;
ControllerType* Controller() const { return controller_.Get(); }
void SetController(ControllerType* controller) { controller_ = controller; }
protected:
explicit ReadableStreamDefaultWrapper(ScriptState*);
// Creates a specialized underlying source that forwards its method calls to
// the provided |readable_stream_wrapper|.
static UnderlyingSourceBase* MakeForwardingUnderlyingSource(
ReadableStreamDefaultWrapper* readable_stream_wrapper);
void SetSource(UnderlyingSourceBase* source) { source_ = source; }
private:
Member<UnderlyingSourceBase> source_;
Member<ControllerType> controller_;
};
class ReadableByteStreamWrapper : public ReadableStreamWrapper {
public:
using ControllerType = ReadableByteStreamController;
void Trace(Visitor*) const override;
ControllerType* Controller() const { return controller_.Get(); }
void SetController(ControllerType* controller) { controller_ = controller; }
protected:
explicit ReadableByteStreamWrapper(ScriptState*);
// Creates a specialized underlying byte source that forwards its method calls
// to the provided |readable_stream_wrapper|.
static UnderlyingByteSourceBase* MakeForwardingUnderlyingByteSource(
ReadableByteStreamWrapper* readable_stream_wrapper);
void SetSource(UnderlyingByteSourceBase* source) { source_ = source; }
private:
Member<UnderlyingByteSourceBase> source_;
Member<ControllerType> controller_;
};
class WritableStreamWrapper : public StreamWrapper {
public:
using ControllerType = WritableStreamDefaultController;
WritableStream* Writable() const { return writable_.Get(); }
// Checks whether |writable_| is locked to a writer.
bool Locked() const override;
// Checks whether there's a write in progress.
virtual bool HasPendingWrite() const { return false; }
// Intercepts signal from WritableStream::abort(...) and processes it out
// of order (without waiting for queued writes to complete first).
// Note that UnderlyingSink::abort(...) will be called right afterwards --
// therefore normally it's sufficient to reject the pending promise (and the
// rest will be handled by the controller).
virtual void OnAbortSignal() = 0;
// Implements UnderlyingSink::write(...)
virtual ScriptPromise<IDLUndefined> Write(ScriptValue, ExceptionState&) = 0;
ControllerType* Controller() const { return controller_.Get(); }
void SetController(ControllerType* controller) { controller_ = controller; }
void Trace(Visitor*) const override;
protected:
explicit WritableStreamWrapper(ScriptState*);
// Creates a specialized underlying source that forwards its method calls to
// the provided |writable_stream_wrapper|.
static UnderlyingSinkBase* MakeForwardingUnderlyingSink(
WritableStreamWrapper* writable_stream_wrapper);
void SetSink(UnderlyingSinkBase* sink) { sink_ = sink; }
void SetWritable(WritableStream* writable) { writable_ = writable; }
private:
Member<UnderlyingSinkBase> sink_;
Member<WritableStream> writable_;
Member<ControllerType> controller_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_DIRECT_SOCKETS_STREAM_WRAPPER_H_
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