80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
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/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CacheStorageConnection.h"
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#include "FetchResponse.h"
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#include <wtf/RandomNumber.h>
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namespace WebCore {
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using namespace WebCore::DOMCacheEngine;
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static inline uint64_t formDataSize(const FormData& formData)
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{
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if (isMainThread())
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return formData.lengthInBytes();
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uint64_t resultSize;
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callOnMainThreadAndWait([formData = formData.isolatedCopy(), &resultSize] {
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resultSize = formData->lengthInBytes();
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});
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return resultSize;
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}
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uint64_t CacheStorageConnection::computeRealBodySize(const DOMCacheEngine::ResponseBody& body)
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{
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uint64_t result = 0;
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WTF::switchOn(body, [&] (const Ref<FormData>& formData) {
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result = formDataSize(formData);
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}, [&] (const Ref<SharedBuffer>& buffer) {
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result = buffer->size();
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}, [] (const std::nullptr_t&) {
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});
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return result;
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}
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uint64_t CacheStorageConnection::computeRecordBodySize(const FetchResponse& response, const DOMCacheEngine::ResponseBody& body)
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{
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if (!response.opaqueLoadIdentifier()) {
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ASSERT(response.tainting() != ResourceResponse::Tainting::Opaque);
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return computeRealBodySize(body);
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}
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return m_opaqueResponseToSizeWithPaddingMap.ensure(response.opaqueLoadIdentifier(), [&] () {
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uint64_t realSize = computeRealBodySize(body);
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// Padding the size as per https://github.com/whatwg/storage/issues/31.
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uint64_t sizeWithPadding = realSize + static_cast<uint64_t>(randomNumber() * 128000);
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sizeWithPadding = ((sizeWithPadding / 32000) + 1) * 32000;
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m_opaqueResponseToSizeWithPaddingMap.set(response.opaqueLoadIdentifier(), sizeWithPadding);
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return sizeWithPadding;
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}).iterator->value;
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}
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} // namespace WebCore
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