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// Copyright 2014 The Chromium Authors. All rights reserved.
// 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_CORE_FETCH_BODY_STREAM_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_FETCH_BODY_STREAM_BUFFER_H_
#include <memory>
#include "third_party/blink/public/platform/web_data_consumer_handle.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/abort_signal.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/fetch/bytes_consumer.h"
#include "third_party/blink/renderer/core/fetch/fetch_data_loader.h"
#include "third_party/blink/renderer/core/streams/underlying_source_base.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class EncodedFormData;
class ScriptState;
class CORE_EXPORT BodyStreamBuffer final : public UnderlyingSourceBase,
public BytesConsumer::Client {
USING_GARBAGE_COLLECTED_MIXIN(BodyStreamBuffer);
public:
// |consumer| must not have a client.
// This function must be called with entering an appropriate V8 context.
// |signal| should be non-null when this BodyStreamBuffer is associated with a
// Response that was created by fetch().
BodyStreamBuffer(ScriptState*,
BytesConsumer* /* consumer */,
AbortSignal* /* signal */);
// |ReadableStreamOperations::isReadableStream(stream)| must hold.
// This function must be called with entering an appropriate V8 context.
BodyStreamBuffer(ScriptState*, ScriptValue stream);
ScriptValue Stream();
// Callable only when neither locked nor disturbed.
scoped_refptr<BlobDataHandle> DrainAsBlobDataHandle(
BytesConsumer::BlobSizePolicy);
scoped_refptr<EncodedFormData> DrainAsFormData();
void StartLoading(FetchDataLoader*, FetchDataLoader::Client* /* client */);
void Tee(BodyStreamBuffer**, BodyStreamBuffer**);
// UnderlyingSourceBase
ScriptPromise pull(ScriptState*) override;
ScriptPromise Cancel(ScriptState*, ScriptValue reason) override;
bool HasPendingActivity() const override;
void ContextDestroyed(ExecutionContext*) override;
// BytesConsumer::Client
void OnStateChange() override;
String DebugName() const override { return "BodyStreamBuffer"; }
bool IsStreamReadable();
bool IsStreamClosed();
bool IsStreamErrored();
bool IsStreamLocked();
bool IsStreamDisturbed();
void CloseAndLockAndDisturb();
ScriptState* GetScriptState() { return script_state_.get(); }
bool IsAborted();
void Trace(blink::Visitor* visitor) override {
visitor->Trace(consumer_);
visitor->Trace(loader_);
visitor->Trace(signal_);
UnderlyingSourceBase::Trace(visitor);
}
private:
class LoaderClient;
BytesConsumer* ReleaseHandle();
void Abort();
void Close();
void GetError();
void CancelConsumer();
void ProcessData();
void EndLoading();
void StopLoading();
scoped_refptr<ScriptState> script_state_;
Member<BytesConsumer> consumer_;
// We need this member to keep it alive while loading.
Member<FetchDataLoader> loader_;
// We need this to ensure that we detect that abort has been signalled
// correctly.
Member<AbortSignal> signal_;
bool stream_needs_more_ = false;
bool made_from_readable_stream_;
bool in_process_data_ = false;
DISALLOW_COPY_AND_ASSIGN(BodyStreamBuffer);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_FETCH_BODY_STREAM_BUFFER_H_
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