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/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "NetworkSendQueue.h"
#include "BlobLoader.h"
#include "ScriptExecutionContext.h"
namespace WebCore {
NetworkSendQueue::NetworkSendQueue(ScriptExecutionContext& context, WriteString&& writeString, WriteRawData&& writeRawData, ProcessError&& processError)
: ContextDestructionObserver(&context)
, m_writeString(WTFMove(writeString))
, m_writeRawData(WTFMove(writeRawData))
, m_processError(WTFMove(processError))
{
}
NetworkSendQueue::~NetworkSendQueue() = default;
void NetworkSendQueue::enqueue(CString&& utf8)
{
if (m_queue.isEmpty()) {
m_writeString(utf8);
return;
}
m_queue.append(WTFMove(utf8));
}
void NetworkSendQueue::enqueue(const JSC::ArrayBuffer& binaryData, unsigned byteOffset, unsigned byteLength)
{
if (m_queue.isEmpty()) {
auto* data = static_cast<const uint8_t*>(binaryData.data());
m_writeRawData(std::span(data + byteOffset, byteLength));
return;
}
m_queue.append(SharedBuffer::create(static_cast<const uint8_t*>(binaryData.data()) + byteOffset, byteLength));
}
void NetworkSendQueue::enqueue(WebCore::Blob& blob)
{
auto* context = scriptExecutionContext();
if (!context)
return;
auto byteLength = blob.size();
if (!byteLength) {
// The cast looks weird, but is required for the overloading resolution to succeed.
// Without it, there is an ambiguity where ArrayBuffer::create(const void* source, size_t byteLength) could be called instead.
enqueue(JSC::ArrayBuffer::create(static_cast<size_t>(0U), 1), 0, 0);
return;
}
auto blobLoader = makeUniqueRef<BlobLoader>([this](BlobLoader&) {
processMessages();
});
auto* blobLoaderPtr = &blobLoader.get();
m_queue.append(WTFMove(blobLoader));
blobLoaderPtr->start(blob, context, FileReaderLoader::ReadAsArrayBuffer);
}
void NetworkSendQueue::clear()
{
// Do not call m_queue.clear() here since destroying a BlobLoader will cause its completion
// handler to get called, which will call processMessages() to iterate over m_queue.
std::exchange(m_queue, { });
}
void NetworkSendQueue::processMessages()
{
while (!m_queue.isEmpty()) {
bool shouldStopProcessing = false;
switchOn(m_queue.first(), [this](const CString& utf8) {
m_writeString(utf8);
}, [this](Ref<FragmentedSharedBuffer>& data) {
data->forEachSegment(m_writeRawData);
}, [this, &shouldStopProcessing](UniqueRef<BlobLoader>& loader) {
auto errorCode = loader->errorCode();
if (loader->isLoading() || (errorCode && errorCode.value() == AbortError)) {
shouldStopProcessing = true;
return;
}
if (const auto& result = loader->arrayBufferResult()) {
m_writeRawData(std::span(static_cast<const uint8_t*>(result->data()), result->byteLength()));
return;
}
ASSERT(errorCode);
shouldStopProcessing = m_processError(errorCode.value()) == Continue::No;
});
if (shouldStopProcessing)
return;
m_queue.removeFirst();
}
}
} // namespace WebCore
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