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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.
#include "config.h"
#include "modules/fetch/BodyStreamBuffer.h"
#include "core/dom/DOMArrayBuffer.h"
namespace blink {
namespace {
class BlobCreator final : public BodyStreamBuffer::Observer {
public:
BlobCreator(BodyStreamBuffer* buffer, const String& contentType, BodyStreamBuffer::BlobHandleCreatorClient* client)
: m_buffer(buffer)
, m_client(client)
, m_blobData(BlobData::create())
{
m_blobData->setContentType(contentType);
}
~BlobCreator() override { }
void trace(Visitor* visitor) override
{
visitor->trace(m_buffer);
visitor->trace(m_client);
BodyStreamBuffer::Observer::trace(visitor);
}
void onWrite() override
{
ASSERT(m_buffer);
while (RefPtr<DOMArrayBuffer> buf = m_buffer->read()) {
m_blobData->appendBytes(buf->data(), buf->byteLength());
}
}
void onClose() override
{
ASSERT(m_buffer);
const long long size = m_blobData->length();
m_client->didCreateBlobHandle(BlobDataHandle::create(m_blobData.release(), size));
cleanup();
}
void onError() override
{
ASSERT(m_buffer);
m_client->didFail(m_buffer->exception());
cleanup();
}
void start()
{
ASSERT(!m_buffer->isObserverRegistered());
m_buffer->registerObserver(this);
onWrite();
if (m_buffer->hasError()) {
return onError();
}
if (m_buffer->isClosed())
return onClose();
}
void cleanup()
{
m_buffer->unregisterObserver();
m_buffer.clear();
m_client.clear();
m_blobData.clear();
}
private:
Member<BodyStreamBuffer> m_buffer;
Member<BodyStreamBuffer::BlobHandleCreatorClient> m_client;
OwnPtr<BlobData> m_blobData;
};
} // namespace
PassRefPtr<DOMArrayBuffer> BodyStreamBuffer::read()
{
if (m_queue.isEmpty())
return PassRefPtr<DOMArrayBuffer>();
return m_queue.takeFirst();
}
void BodyStreamBuffer::write(PassRefPtr<DOMArrayBuffer> chunk)
{
ASSERT(!m_isClosed);
ASSERT(!m_exception);
ASSERT(chunk);
m_queue.append(chunk);
if (m_observer)
m_observer->onWrite();
}
void BodyStreamBuffer::close()
{
ASSERT(!m_isClosed);
ASSERT(!m_exception);
m_isClosed = true;
if (m_observer)
m_observer->onClose();
}
void BodyStreamBuffer::error(PassRefPtrWillBeRawPtr<DOMException> exception)
{
ASSERT(exception);
ASSERT(!m_isClosed);
ASSERT(!m_exception);
m_exception = exception;
if (m_observer)
m_observer->onError();
}
bool BodyStreamBuffer::readAllAndCreateBlobHandle(const String& contentType, BlobHandleCreatorClient* client)
{
if (m_observer)
return false;
BlobCreator* blobCreator = new BlobCreator(this, contentType, client);
blobCreator->start();
return true;
}
bool BodyStreamBuffer::registerObserver(Observer* observer)
{
if (m_observer)
return false;
ASSERT(observer);
m_observer = observer;
return true;
}
void BodyStreamBuffer::unregisterObserver()
{
m_observer.clear();
}
void BodyStreamBuffer::trace(Visitor* visitor)
{
visitor->trace(m_exception);
visitor->trace(m_observer);
}
BodyStreamBuffer::BodyStreamBuffer()
: m_isClosed(false)
{
}
} // namespace blink
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