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annotate Core/FileStorage/StorageAccessor.cpp @ 2244:a3a65de1840f

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shared copyright with osimis
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 04 Jan 2017 12:09:40 +0100
parents 84d1d392a9ab
children 75c779ca948c
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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 * Copyright (C) 2017 Osimis, Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "StorageAccessor.h"
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36
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37 #include "../Compression/ZlibCompressor.h"
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38 #include "../OrthancException.h"
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39 #include "../HttpServer/HttpStreamTranscoder.h"
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40 #include "../Toolbox.h"
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41 #include "../SystemToolbox.h"
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42
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43 namespace Orthanc
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44 {
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45 FileInfo StorageAccessor::Write(const void* data,
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46 size_t size,
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47 FileContentType type,
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48 CompressionType compression,
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49 bool storeMd5)
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50 {
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51 std::string uuid = SystemToolbox::GenerateUuid();
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52
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53 std::string md5;
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54
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55 if (storeMd5)
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56 {
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57 Toolbox::ComputeMD5(md5, data, size);
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58 }
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59
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60 switch (compression)
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61 {
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62 case CompressionType_None:
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63 {
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64 area_.Create(uuid, data, size, type);
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65 return FileInfo(uuid, type, size, md5);
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66 }
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67
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68 case CompressionType_ZlibWithSize:
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69 {
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70 ZlibCompressor zlib;
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71
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72 std::string compressed;
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73 zlib.Compress(compressed, data, size);
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75 std::string compressedMD5;
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76
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77 if (storeMd5)
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78 {
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79 Toolbox::ComputeMD5(compressedMD5, compressed);
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80 }
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81
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82 if (compressed.size() > 0)
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83 {
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84 area_.Create(uuid, &compressed[0], compressed.size(), type);
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85 }
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86 else
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87 {
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88 area_.Create(uuid, NULL, 0, type);
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89 }
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90
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91 return FileInfo(uuid, type, size, md5,
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92 CompressionType_ZlibWithSize, compressed.size(), compressedMD5);
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93 }
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94
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95 default:
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96 throw OrthancException(ErrorCode_NotImplemented);
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97 }
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98 }
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99
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100
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101 void StorageAccessor::Read(std::string& content,
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102 const FileInfo& info)
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103 {
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104 switch (info.GetCompressionType())
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105 {
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106 case CompressionType_None:
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107 {
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108 area_.Read(content, info.GetUuid(), info.GetContentType());
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109 break;
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110 }
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111
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112 case CompressionType_ZlibWithSize:
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113 {
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114 ZlibCompressor zlib;
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115
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116 std::string compressed;
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117 area_.Read(compressed, info.GetUuid(), info.GetContentType());
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118 IBufferCompressor::Uncompress(content, zlib, compressed);
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119 break;
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120 }
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121
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122 default:
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123 {
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124 throw OrthancException(ErrorCode_NotImplemented);
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125 }
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126 }
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127
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128 // TODO Check the validity of the uncompressed MD5?
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129 }
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130
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131
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132 void StorageAccessor::Read(Json::Value& content,
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133 const FileInfo& info)
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134 {
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135 std::string s;
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136 Read(s, info);
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137
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138 Json::Reader reader;
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139 if (!reader.parse(s, content))
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140 {
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141 throw OrthancException(ErrorCode_BadFileFormat);
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142 }
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143 }
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144
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145
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146 void StorageAccessor::SetupSender(BufferHttpSender& sender,
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147 const FileInfo& info,
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148 const std::string& mime)
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149 {
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150 area_.Read(sender.GetBuffer(), info.GetUuid(), info.GetContentType());
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151 sender.SetContentType(mime);
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152
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153 const char* extension;
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154 switch (info.GetContentType())
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155 {
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156 case FileContentType_Dicom:
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157 extension = ".dcm";
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158 break;
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159
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160 case FileContentType_DicomAsJson:
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161 extension = ".json";
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162 break;
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163
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164 default:
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165 // Non-standard content type
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166 extension = "";
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167 }
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168
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169 sender.SetContentFilename(info.GetUuid() + std::string(extension));
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170 }
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171
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172
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173 void StorageAccessor::AnswerFile(HttpOutput& output,
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174 const FileInfo& info,
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175 const std::string& mime)
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176 {
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177 BufferHttpSender sender;
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178 SetupSender(sender, info, mime);
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179
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180 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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181 output.Answer(transcoder);
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182 }
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183
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184
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185 void StorageAccessor::AnswerFile(RestApiOutput& output,
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186 const FileInfo& info,
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187 const std::string& mime)
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188 {
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189 BufferHttpSender sender;
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190 SetupSender(sender, info, mime);
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191
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192 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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193 output.AnswerStream(transcoder);
221
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194 }
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195 }