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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2025 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.
*/
#pragma once
#include <WebCore/BlobData.h>
#include <WebCore/FileStreamClient.h>
#include <WebCore/HTTPParsers.h>
#include <wtf/Forward.h>
#include <wtf/Variant.h>
#include <wtf/Vector.h>
namespace WebCore {
class AsyncFileStream;
class BlobDataItem;
class FileStream;
class ResourceRequest;
class BlobResourceHandleBase : public FileStreamClient {
public:
enum class Error {
NoError = 0,
NotFoundError = 1,
SecurityError = 2,
RangeError = 3,
NotReadableError = 4,
MethodNotAllowed = 5
};
protected:
WEBCORE_EXPORT BlobResourceHandleBase(bool async = true, RefPtr<BlobData>&& = nullptr);
WEBCORE_EXPORT virtual ~BlobResourceHandleBase();
WEBCORE_EXPORT void start();
WEBCORE_EXPORT void readAsync();
WEBCORE_EXPORT void closeFileIfOpen();
bool isFileOpen() const { return m_isFileOpen; }
void setIsFileOpen(bool isOpen) { m_isFileOpen = isOpen; }
bool async() const { return std::holds_alternative<std::unique_ptr<AsyncFileStream>>(m_stream); }
uint64_t totalSize() { return m_totalSize; }
uint64_t totalRemainingSize() const { return m_totalRemainingSize; }
uint64_t currentItemReadSize() const { return m_currentItemReadSize; }
void setCurrentItemReadSize(uint64_t size) { m_currentItemReadSize = size; }
void decrementTotalRemainingSizeBy(uint64_t value) { m_totalRemainingSize -= value; }
uint64_t readItemCount() const { return m_readItemCount; }
void incrementReadItemCount() { ++m_readItemCount; }
uint64_t lengthOfItemBeingRead() const { return m_itemLengthList[m_readItemCount]; }
WEBCORE_EXPORT void clearAsyncStream();
WEBCORE_EXPORT BlobData* blobData() const;
FileStream* syncStream() const;
AsyncFileStream* asyncStream() const;
Vector<uint8_t>& buffer() { return m_buffer; }
const Vector<uint8_t>& buffer() const { return m_buffer; }
private:
void getSizeForNext();
std::optional<Error> seek();
std::optional<Error> adjustAndValidateRangeBounds();
bool consumeData(std::span<const uint8_t>);
bool readDataAsync(const BlobDataItem&);
void readFileAsync(const BlobDataItem&);
void dispatchDidReceiveResponse();
void doStart();
virtual void didReceiveResponse(ResourceResponse&&) = 0;
virtual void didFail(Error) = 0;
virtual bool didReceiveData(std::span<const uint8_t>) = 0;
virtual void didFinish() = 0;
virtual bool erroredOrAborted() const = 0;
virtual bool shouldAbortDispatchDidReceiveResponse() { return false; }
virtual const ResourceRequest& firstRequest() const = 0;
virtual void clearStream() { }
// FileStreamClient methods.
WEBCORE_EXPORT void didOpen(bool) final;
WEBCORE_EXPORT void didGetSize(long long) final;
WEBCORE_EXPORT void didRead(int) final;
RefPtr<BlobData> m_blobData;
// For Async or Sync loading.
Variant<std::unique_ptr<AsyncFileStream>, std::unique_ptr<FileStream>> m_stream;
std::optional<HTTPRange> m_range;
Vector<uint8_t> m_buffer;
Vector<uint64_t> m_itemLengthList;
uint64_t m_totalSize { 0 };
uint64_t m_totalRemainingSize { 0 };
uint64_t m_currentItemReadSize { 0 };
unsigned m_readItemCount { 0 };
unsigned m_sizeItemCount { 0 };
bool m_isFileOpen { false };
bool m_isRangeRequest { false };
};
} // WebCore
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