Mercurial > hg > orthanc

annotate Core/FileStorage/CompressedFileStorageAccessor.cpp @ 1134:ba9fd42284d0

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preparing storage plugin
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 09 Sep 2014 12:53:49 +0200
parents bf67431a7383
children 67c3c1e4a6e0
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "../PrecompiledHeaders.h"
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34 #include "CompressedFileStorageAccessor.h"
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35
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36 #include "../OrthancException.h"
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37 #include "FileStorageAccessor.h"
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38 #include "../HttpServer/BufferHttpSender.h"
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39
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40 #include <memory>
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41
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42 namespace Orthanc
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43 {
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44 FileInfo CompressedFileStorageAccessor::WriteInternal(const void* data,
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45 size_t size,
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46 FileContentType type)
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47 {
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48 std::string md5;
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49
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50 if (storeMD5_)
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51 {
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52 Toolbox::ComputeMD5(md5, data, size);
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53 }
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54
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55 switch (compressionType_)
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56 {
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57 case CompressionType_None:
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58 {
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59 std::string uuid = GetStorageArea().Create(data, size, type);
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60 return FileInfo(uuid, type, size, md5);
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61 }
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62
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63 case CompressionType_Zlib:
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64 {
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65 std::string compressed;
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66 zlib_.Compress(compressed, data, size);
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67
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68 std::string compressedMD5;
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69
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70 if (storeMD5_)
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71 {
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72 Toolbox::ComputeMD5(compressedMD5, compressed);
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73 }
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74
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75 std::string uuid;
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76 if (compressed.size() > 0)
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77 {
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78 uuid = GetStorageArea().Create(&compressed[0], compressed.size(), type);
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79 }
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80 else
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81 {
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82 uuid = GetStorageArea().Create(NULL, 0, type);
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83 }
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84
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85 return FileInfo(uuid, type, size, md5,
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86 CompressionType_Zlib, compressed.size(), compressedMD5);
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87 }
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88
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89 default:
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90 throw OrthancException(ErrorCode_NotImplemented);
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91 }
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92 }
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93
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94
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95 CompressedFileStorageAccessor::CompressedFileStorageAccessor() :
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96 storage_(NULL),
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97 compressionType_(CompressionType_None)
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98 {
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99 }
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100
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101
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102 CompressedFileStorageAccessor::CompressedFileStorageAccessor(IStorageArea& storage) :
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103 storage_(&storage),
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104 compressionType_(CompressionType_None)
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105 {
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106 }
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107
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108
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109 IStorageArea& CompressedFileStorageAccessor::GetStorageArea()
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110 {
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111 if (storage_ == NULL)
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112 {
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113 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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114 }
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115
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116 return *storage_;
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117 }
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118
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119
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120 void CompressedFileStorageAccessor::Read(std::string& content,
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121 const std::string& uuid,
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122 FileContentType type)
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123 {
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124 switch (compressionType_)
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125 {
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126 case CompressionType_None:
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127 GetStorageArea().Read(content, uuid, type);
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128 break;
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129
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130 case CompressionType_Zlib:
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131 {
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132 std::string compressed;
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133 GetStorageArea().Read(compressed, uuid, type);
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134 zlib_.Uncompress(content, compressed);
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135 break;
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136 }
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137
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138 default:
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139 throw OrthancException(ErrorCode_NotImplemented);
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140 }
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141 }
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142
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143 HttpFileSender* CompressedFileStorageAccessor::ConstructHttpFileSender(const std::string& uuid,
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144 FileContentType type)
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145 {
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146 switch (compressionType_)
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147 {
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148 case CompressionType_None:
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149 {
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150 FileStorageAccessor uncompressedAccessor(GetStorageArea());
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151 return uncompressedAccessor.ConstructHttpFileSender(uuid, type);
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152 }
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153
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154 case CompressionType_Zlib:
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155 {
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156 std::string compressed;
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157 GetStorageArea().Read(compressed, uuid, type);
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158
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159 std::auto_ptr<BufferHttpSender> sender(new BufferHttpSender);
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160 zlib_.Uncompress(sender->GetBuffer(), compressed);
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161
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162 return sender.release();
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163 }
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164
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165 default:
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166 throw OrthancException(ErrorCode_NotImplemented);
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167 }
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168 }
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169
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170
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171 void CompressedFileStorageAccessor::Remove(const std::string& uuid,
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172 FileContentType type)
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173 {
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174 GetStorageArea().Remove(uuid, type);
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175 }
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176 }