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annotate Core/FileStorage/CompressedFileStorageAccessor.cpp @ 1401:67dca9b38c49

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 01 Jun 2015 14:08:30 +0200
parents 6e7e5ed91c2d
children f967bdf8534e
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, 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 #include "../Uuid.h"
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40
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41 #include <memory>
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42 #include <glog/logging.h>
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43
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44 namespace Orthanc
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45 {
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46 FileInfo CompressedFileStorageAccessor::WriteInternal(const void* data,
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47 size_t size,
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48 FileContentType type)
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49 {
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50 std::string uuid = Toolbox::GenerateUuid();
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51
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52 std::string md5;
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53
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54 if (storeMD5_)
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55 {
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56 Toolbox::ComputeMD5(md5, data, size);
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57 }
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58
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59 switch (compressionType_)
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60 {
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61 case CompressionType_None:
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62 {
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63 GetStorageArea().Create(uuid.c_str(), data, size, type);
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64 return FileInfo(uuid, type, size, md5);
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65 }
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66
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67 case CompressionType_Zlib:
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68 {
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69 std::string compressed;
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70 zlib_.Compress(compressed, data, size);
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71
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72 std::string compressedMD5;
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73
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74 if (storeMD5_)
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75 {
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76 Toolbox::ComputeMD5(compressedMD5, compressed);
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77 }
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78
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79 if (compressed.size() > 0)
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80 {
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81 GetStorageArea().Create(uuid.c_str(), &compressed[0], compressed.size(), type);
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82 }
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83 else
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84 {
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85 GetStorageArea().Create(uuid.c_str(), NULL, 0, type);
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86 }
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87
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88 return FileInfo(uuid, type, size, md5,
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89 CompressionType_Zlib, compressed.size(), compressedMD5);
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90 }
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91
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92 default:
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93 throw OrthancException(ErrorCode_NotImplemented);
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94 }
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95 }
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96
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97
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98 CompressedFileStorageAccessor::CompressedFileStorageAccessor() :
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99 storage_(NULL),
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100 compressionType_(CompressionType_None)
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101 {
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102 }
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103
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104
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105 CompressedFileStorageAccessor::CompressedFileStorageAccessor(IStorageArea& storage) :
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106 storage_(&storage),
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107 compressionType_(CompressionType_None)
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108 {
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109 }
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110
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111
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112 IStorageArea& CompressedFileStorageAccessor::GetStorageArea()
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113 {
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114 if (storage_ == NULL)
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115 {
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116 LOG(ERROR) << "No storage area is currently available";
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117 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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118 }
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119
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120 return *storage_;
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121 }
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122
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123
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124 void CompressedFileStorageAccessor::Read(std::string& content,
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125 const std::string& uuid,
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126 FileContentType type)
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127 {
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128 switch (compressionType_)
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129 {
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130 case CompressionType_None:
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131 GetStorageArea().Read(content, uuid, type);
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132 break;
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133
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134 case CompressionType_Zlib:
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135 {
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136 std::string compressed;
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137 GetStorageArea().Read(compressed, uuid, type);
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138 zlib_.Uncompress(content, compressed);
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139 break;
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140 }
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141
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142 default:
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143 throw OrthancException(ErrorCode_NotImplemented);
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144 }
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145 }
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146
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147 HttpFileSender* CompressedFileStorageAccessor::ConstructHttpFileSender(const std::string& uuid,
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148 FileContentType type)
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149 {
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150 switch (compressionType_)
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151 {
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152 case CompressionType_None:
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153 {
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154 FileStorageAccessor uncompressedAccessor(GetStorageArea());
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155 return uncompressedAccessor.ConstructHttpFileSender(uuid, type);
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156 }
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157
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158 case CompressionType_Zlib:
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159 {
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160 std::string compressed;
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161 GetStorageArea().Read(compressed, uuid, type);
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162
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163 std::auto_ptr<BufferHttpSender> sender(new BufferHttpSender);
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164 zlib_.Uncompress(sender->GetBuffer(), compressed);
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165
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166 return sender.release();
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167 }
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168
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169 default:
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170 throw OrthancException(ErrorCode_NotImplemented);
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171 }
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172 }
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173
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174
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175 void CompressedFileStorageAccessor::Remove(const std::string& uuid,
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176 FileContentType type)
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177 {
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178 GetStorageArea().Remove(uuid, type);
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179 }
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180 }