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annotate Core/FileStorage/StorageAccessor.cpp @ 2157:f75611abd407

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cmake option USE_DCMTK_361_PRIVATE_DIC
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 17 Nov 2016 15:39:10 +0100
parents 5a8840920121
children 84d1d392a9ab
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 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 "StorageAccessor.h"
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35
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36 #include "../Compression/ZlibCompressor.h"
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37 #include "../OrthancException.h"
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38 #include "../HttpServer/HttpStreamTranscoder.h"
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39 #include "../Toolbox.h"
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40
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41 namespace Orthanc
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42 {
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43 FileInfo StorageAccessor::Write(const void* data,
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44 size_t size,
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45 FileContentType type,
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46 CompressionType compression,
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47 bool storeMd5)
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48 {
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49 std::string uuid = Toolbox::GenerateUuid();
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50
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51 std::string md5;
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52
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53 if (storeMd5)
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54 {
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55 Toolbox::ComputeMD5(md5, data, size);
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56 }
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57
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58 switch (compression)
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59 {
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60 case CompressionType_None:
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61 {
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62 area_.Create(uuid, data, size, type);
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63 return FileInfo(uuid, type, size, md5);
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64 }
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65
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66 case CompressionType_ZlibWithSize:
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67 {
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68 ZlibCompressor zlib;
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69
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70 std::string compressed;
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71 zlib.Compress(compressed, data, size);
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72
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73 std::string compressedMD5;
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74
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75 if (storeMd5)
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76 {
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77 Toolbox::ComputeMD5(compressedMD5, compressed);
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78 }
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79
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80 if (compressed.size() > 0)
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81 {
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82 area_.Create(uuid, &compressed[0], compressed.size(), type);
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83 }
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84 else
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85 {
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86 area_.Create(uuid, NULL, 0, type);
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87 }
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88
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89 return FileInfo(uuid, type, size, md5,
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90 CompressionType_ZlibWithSize, compressed.size(), compressedMD5);
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91 }
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92
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93 default:
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94 throw OrthancException(ErrorCode_NotImplemented);
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95 }
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96 }
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97
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98
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99 void StorageAccessor::Read(std::string& content,
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100 const FileInfo& info)
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101 {
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102 switch (info.GetCompressionType())
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103 {
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104 case CompressionType_None:
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105 {
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106 area_.Read(content, info.GetUuid(), info.GetContentType());
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107 break;
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108 }
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109
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110 case CompressionType_ZlibWithSize:
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111 {
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112 ZlibCompressor zlib;
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113
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114 std::string compressed;
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115 area_.Read(compressed, info.GetUuid(), info.GetContentType());
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116 IBufferCompressor::Uncompress(content, zlib, compressed);
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117 break;
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118 }
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119
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120 default:
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121 {
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122 throw OrthancException(ErrorCode_NotImplemented);
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123 }
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124 }
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125
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126 // TODO Check the validity of the uncompressed MD5?
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127 }
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128
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129
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130 void StorageAccessor::Read(Json::Value& content,
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131 const FileInfo& info)
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132 {
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133 std::string s;
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134 Read(s, info);
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135
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136 Json::Reader reader;
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137 if (!reader.parse(s, content))
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138 {
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139 throw OrthancException(ErrorCode_BadFileFormat);
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140 }
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141 }
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142
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143
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144 void StorageAccessor::SetupSender(BufferHttpSender& sender,
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145 const FileInfo& info,
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146 const std::string& mime)
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147 {
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148 area_.Read(sender.GetBuffer(), info.GetUuid(), info.GetContentType());
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149 sender.SetContentType(mime);
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150
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151 const char* extension;
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152 switch (info.GetContentType())
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153 {
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154 case FileContentType_Dicom:
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155 extension = ".dcm";
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156 break;
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157
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158 case FileContentType_DicomAsJson:
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159 extension = ".json";
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160 break;
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161
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162 default:
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163 // Non-standard content type
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164 extension = "";
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165 }
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166
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167 sender.SetContentFilename(info.GetUuid() + std::string(extension));
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168 }
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169
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170
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171 void StorageAccessor::AnswerFile(HttpOutput& output,
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172 const FileInfo& info,
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173 const std::string& mime)
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174 {
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175 BufferHttpSender sender;
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176 SetupSender(sender, info, mime);
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177
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178 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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179 output.Answer(transcoder);
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180 }
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181
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182
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183 void StorageAccessor::AnswerFile(RestApiOutput& output,
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184 const FileInfo& info,
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185 const std::string& mime)
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186 {
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187 BufferHttpSender sender;
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188 SetupSender(sender, info, mime);
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189
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190 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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191 output.AnswerStream(transcoder);
221
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192 }
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193 }