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/**
* Orthanc - A Lightweight, RESTful DICOM Store
* Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
* Belgium
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* In addition, as a special exception, the copyright holders of this
* program give permission to link the code of its release with the
* OpenSSL project's "OpenSSL" library (or with modified versions of it
* that use the same license as the "OpenSSL" library), and distribute
* the linked executables. You must obey the GNU General Public License
* in all respects for all of the code used other than "OpenSSL". If you
* modify file(s) with this exception, you may extend this exception to
* your version of the file(s), but you are not obligated to do so. If
* you do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source files
* in the program, then also delete it here.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
#include "../PrecompiledHeaders.h"
#include "CompressedFileStorageAccessor.h"
#include "../OrthancException.h"
#include "FileStorageAccessor.h"
#include "../HttpServer/BufferHttpSender.h"
#include "../Uuid.h"
#include <memory>
#include <glog/logging.h>
namespace Orthanc
{
FileInfo CompressedFileStorageAccessor::WriteInternal(const void* data,
size_t size,
FileContentType type)
{
std::string uuid = Toolbox::GenerateUuid();
std::string md5;
if (storeMD5_)
{
Toolbox::ComputeMD5(md5, data, size);
}
switch (compressionType_)
{
case CompressionType_None:
{
GetStorageArea().Create(uuid.c_str(), data, size, type);
return FileInfo(uuid, type, size, md5);
}
case CompressionType_Zlib:
{
std::string compressed;
zlib_.Compress(compressed, data, size);
std::string compressedMD5;
if (storeMD5_)
{
Toolbox::ComputeMD5(compressedMD5, compressed);
}
if (compressed.size() > 0)
{
GetStorageArea().Create(uuid.c_str(), &compressed[0], compressed.size(), type);
}
else
{
GetStorageArea().Create(uuid.c_str(), NULL, 0, type);
}
return FileInfo(uuid, type, size, md5,
CompressionType_Zlib, compressed.size(), compressedMD5);
}
default:
throw OrthancException(ErrorCode_NotImplemented);
}
}
CompressedFileStorageAccessor::CompressedFileStorageAccessor() :
storage_(NULL),
compressionType_(CompressionType_None)
{
}
CompressedFileStorageAccessor::CompressedFileStorageAccessor(IStorageArea& storage) :
storage_(&storage),
compressionType_(CompressionType_None)
{
}
IStorageArea& CompressedFileStorageAccessor::GetStorageArea()
{
if (storage_ == NULL)
{
LOG(ERROR) << "No storage area is currently available";
throw OrthancException(ErrorCode_BadSequenceOfCalls);
}
return *storage_;
}
void CompressedFileStorageAccessor::Read(std::string& content,
const std::string& uuid,
FileContentType type)
{
switch (compressionType_)
{
case CompressionType_None:
GetStorageArea().Read(content, uuid, type);
break;
case CompressionType_Zlib:
{
std::string compressed;
GetStorageArea().Read(compressed, uuid, type);
zlib_.Uncompress(content, compressed);
break;
}
default:
throw OrthancException(ErrorCode_NotImplemented);
}
}
HttpFileSender* CompressedFileStorageAccessor::ConstructHttpFileSender(const std::string& uuid,
FileContentType type)
{
switch (compressionType_)
{
case CompressionType_None:
{
FileStorageAccessor uncompressedAccessor(GetStorageArea());
return uncompressedAccessor.ConstructHttpFileSender(uuid, type);
}
case CompressionType_Zlib:
{
std::string compressed;
GetStorageArea().Read(compressed, uuid, type);
std::auto_ptr<BufferHttpSender> sender(new BufferHttpSender);
zlib_.Uncompress(sender->GetBuffer(), compressed);
return sender.release();
}
default:
throw OrthancException(ErrorCode_NotImplemented);
}
}
void CompressedFileStorageAccessor::Remove(const std::string& uuid,
FileContentType type)
{
GetStorageArea().Remove(uuid, type);
}
}
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