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annotate Core/FileStorage/StorageAccessor.cpp @ 2412:cad393b41bc3

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 29 Sep 2017 11:35:45 +0200
parents 75c779ca948c
children 878b59270859
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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 "../Toolbox.h"
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40 #include "../SystemToolbox.h"
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41
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42 #if ORTHANC_ENABLE_CIVETWEB == 1 || ORTHANC_ENABLE_MONGOOSE == 1
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43 # include "../HttpServer/HttpStreamTranscoder.h"
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44 #endif
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45
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46 namespace Orthanc
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47 {
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48 FileInfo StorageAccessor::Write(const void* data,
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49 size_t size,
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50 FileContentType type,
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51 CompressionType compression,
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52 bool storeMd5)
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53 {
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54 std::string uuid = SystemToolbox::GenerateUuid();
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55
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56 std::string md5;
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57
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58 if (storeMd5)
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59 {
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60 Toolbox::ComputeMD5(md5, data, size);
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61 }
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62
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63 switch (compression)
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64 {
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65 case CompressionType_None:
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66 {
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67 area_.Create(uuid, data, size, type);
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68 return FileInfo(uuid, type, size, md5);
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69 }
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70
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71 case CompressionType_ZlibWithSize:
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72 {
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73 ZlibCompressor zlib;
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74
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75 std::string compressed;
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76 zlib.Compress(compressed, data, size);
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77
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78 std::string compressedMD5;
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79
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80 if (storeMd5)
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81 {
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82 Toolbox::ComputeMD5(compressedMD5, compressed);
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83 }
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84
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85 if (compressed.size() > 0)
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86 {
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87 area_.Create(uuid, &compressed[0], compressed.size(), type);
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88 }
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89 else
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90 {
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91 area_.Create(uuid, NULL, 0, type);
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92 }
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93
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94 return FileInfo(uuid, type, size, md5,
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95 CompressionType_ZlibWithSize, compressed.size(), compressedMD5);
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96 }
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97
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98 default:
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99 throw OrthancException(ErrorCode_NotImplemented);
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100 }
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101 }
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102
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103
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104 void StorageAccessor::Read(std::string& content,
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105 const FileInfo& info)
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106 {
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107 switch (info.GetCompressionType())
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108 {
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109 case CompressionType_None:
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110 {
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111 area_.Read(content, info.GetUuid(), info.GetContentType());
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112 break;
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113 }
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114
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115 case CompressionType_ZlibWithSize:
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116 {
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117 ZlibCompressor zlib;
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118
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119 std::string compressed;
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120 area_.Read(compressed, info.GetUuid(), info.GetContentType());
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121 IBufferCompressor::Uncompress(content, zlib, compressed);
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122 break;
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123 }
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124
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125 default:
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126 {
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127 throw OrthancException(ErrorCode_NotImplemented);
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128 }
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129 }
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130
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131 // TODO Check the validity of the uncompressed MD5?
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132 }
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133
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134
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135 void StorageAccessor::Read(Json::Value& content,
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136 const FileInfo& info)
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137 {
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138 std::string s;
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139 Read(s, info);
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140
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141 Json::Reader reader;
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142 if (!reader.parse(s, content))
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143 {
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144 throw OrthancException(ErrorCode_BadFileFormat);
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145 }
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146 }
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147
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148
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149 #if ORTHANC_ENABLE_CIVETWEB == 1 || ORTHANC_ENABLE_MONGOOSE == 1
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150 void StorageAccessor::SetupSender(BufferHttpSender& sender,
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151 const FileInfo& info,
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152 const std::string& mime)
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153 {
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154 area_.Read(sender.GetBuffer(), info.GetUuid(), info.GetContentType());
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155 sender.SetContentType(mime);
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156
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157 const char* extension;
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158 switch (info.GetContentType())
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159 {
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160 case FileContentType_Dicom:
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161 extension = ".dcm";
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162 break;
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163
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164 case FileContentType_DicomAsJson:
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165 extension = ".json";
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166 break;
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167
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168 default:
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169 // Non-standard content type
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170 extension = "";
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171 }
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172
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173 sender.SetContentFilename(info.GetUuid() + std::string(extension));
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174 }
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175 #endif
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176
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177
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178 #if ORTHANC_ENABLE_CIVETWEB == 1 || ORTHANC_ENABLE_MONGOOSE == 1
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179 void StorageAccessor::AnswerFile(HttpOutput& output,
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180 const FileInfo& info,
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181 const std::string& mime)
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182 {
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183 BufferHttpSender sender;
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184 SetupSender(sender, info, mime);
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185
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186 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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187 output.Answer(transcoder);
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188 }
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189 #endif
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190
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191
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192 #if ORTHANC_ENABLE_CIVETWEB == 1 || ORTHANC_ENABLE_MONGOOSE == 1
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193 void StorageAccessor::AnswerFile(RestApiOutput& output,
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194 const FileInfo& info,
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195 const std::string& mime)
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196 {
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197 BufferHttpSender sender;
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198 SetupSender(sender, info, mime);
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199
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200 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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201 output.AnswerStream(transcoder);
221
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202 }
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203 #endif
221
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204 }