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annotate OrthancFramework/Sources/FileStorage/FilesystemStorage.cpp @ 5065:3f16204b4c8d

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 15 Aug 2022 14:11:42 +0200
parents 43e613a7756b
children d7274e43ea7c 0ea402b4d901
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "../PrecompiledHeaders.h"
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25 #include "FilesystemStorage.h"
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27 // http://stackoverflow.com/questions/1576272/storing-large-number-of-files-in-file-system
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28 // http://stackoverflow.com/questions/446358/storing-a-large-number-of-images
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29
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30 #include "../Logging.h"
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31 #include "../OrthancException.h"
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32 #include "../StringMemoryBuffer.h"
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33 #include "../SystemToolbox.h"
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34 #include "../Toolbox.h"
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36 #include <boost/filesystem/fstream.hpp>
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37
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38
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39 static std::string ToString(const boost::filesystem::path& p)
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40 {
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41 #if BOOST_HAS_FILESYSTEM_V3 == 1
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42 return p.filename().string();
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43 #else
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44 return p.filename();
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45 #endif
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46 }
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48
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49 namespace Orthanc
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50 {
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51 boost::filesystem::path FilesystemStorage::GetPath(const std::string& uuid) const
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52 {
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53 namespace fs = boost::filesystem;
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54
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55 if (!Toolbox::IsUuid(uuid))
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56 {
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57 throw OrthancException(ErrorCode_ParameterOutOfRange);
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58 }
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60 fs::path path = root_;
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61
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62 path /= std::string(&uuid[0], &uuid[2]);
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63 path /= std::string(&uuid[2], &uuid[4]);
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64 path /= uuid;
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65
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66 #if BOOST_HAS_FILESYSTEM_V3 == 1
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67 path.make_preferred();
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68 #endif
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70 return path;
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71 }
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72
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73 void FilesystemStorage::Setup(const std::string& root)
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74 {
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75 //root_ = boost::filesystem::absolute(root).string();
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76 root_ = root;
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77
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78 SystemToolbox::MakeDirectory(root);
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79 }
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80
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81 FilesystemStorage::FilesystemStorage(const std::string &root) :
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82 fsyncOnWrite_(false)
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83 {
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84 Setup(root);
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85 }
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86
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87 FilesystemStorage::FilesystemStorage(const std::string &root,
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88 bool fsyncOnWrite) :
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89 fsyncOnWrite_(fsyncOnWrite)
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90 {
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91 Setup(root);
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92 }
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96 static const char* GetDescriptionInternal(FileContentType content)
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97 {
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98 // This function is for logging only (internal use), a more
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99 // fully-featured version is available in ServerEnumerations.cpp
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100 switch (content)
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101 {
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102 case FileContentType_Unknown:
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103 return "Unknown";
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104
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105 case FileContentType_Dicom:
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106 return "DICOM";
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107
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108 case FileContentType_DicomAsJson:
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109 return "JSON summary of DICOM";
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110
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111 case FileContentType_DicomUntilPixelData:
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112 return "DICOM until pixel data";
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113
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114 default:
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115 return "User-defined";
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116 }
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117 }
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118
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119
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120 void FilesystemStorage::Create(const std::string& uuid,
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121 const void* content,
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122 size_t size,
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123 FileContentType type)
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124 {
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125 LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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126 << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)";
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127
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128 boost::filesystem::path path;
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129
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130 path = GetPath(uuid);
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131
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132 if (boost::filesystem::exists(path))
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133 {
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134 // Extremely unlikely case: This Uuid has already been created
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135 // in the past.
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136 throw OrthancException(ErrorCode_InternalError);
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137 }
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138
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139 if (boost::filesystem::exists(path.parent_path()))
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140 {
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141 if (!boost::filesystem::is_directory(path.parent_path()))
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142 {
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143 throw OrthancException(ErrorCode_DirectoryOverFile);
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144 }
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145 }
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146 else
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147 {
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148 if (!boost::filesystem::create_directories(path.parent_path()))
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149 {
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150 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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151 }
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152 }
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153
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154 SystemToolbox::WriteFile(content, size, path.string(), fsyncOnWrite_);
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155 }
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156
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157
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158 IMemoryBuffer* FilesystemStorage::Read(const std::string& uuid,
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159 FileContentType type)
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160 {
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161 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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162 << "\" content type";
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163
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164 std::string content;
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165 SystemToolbox::ReadFile(content, GetPath(uuid).string());
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166
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167 return StringMemoryBuffer::CreateFromSwap(content);
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168 }
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169
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170
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171 IMemoryBuffer* FilesystemStorage::ReadRange(const std::string& uuid,
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172 FileContentType type,
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173 uint64_t start /* inclusive */,
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174 uint64_t end /* exclusive */)
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175 {
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176 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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177 << "\" content type (range from " << start << " to " << end << ")";
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178
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179 std::string content;
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180 SystemToolbox::ReadFileRange(
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181 content, GetPath(uuid).string(), start, end, true /* throw if overflow */);
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182
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183 return StringMemoryBuffer::CreateFromSwap(content);
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184 }
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185
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186
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187 bool FilesystemStorage::HasReadRange() const
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188 {
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189 return true;
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190 }
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191
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192
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193 uintmax_t FilesystemStorage::GetSize(const std::string& uuid) const
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194 {
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195 boost::filesystem::path path = GetPath(uuid);
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196 return boost::filesystem::file_size(path);
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197 }
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198
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199
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200
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201 void FilesystemStorage::ListAllFiles(std::set<std::string>& result) const
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202 {
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203 namespace fs = boost::filesystem;
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204
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205 result.clear();
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206
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207 if (fs::exists(root_) && fs::is_directory(root_))
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208 {
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209 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current)
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210 {
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211 if (SystemToolbox::IsRegularFile(current->path().string()))
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212 {
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213 try
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214 {
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215 fs::path d = current->path();
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216 std::string uuid = ToString(d);
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217 if (Toolbox::IsUuid(uuid))
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218 {
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219 fs::path p0 = d.parent_path().parent_path().parent_path();
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220 std::string p1 = ToString(d.parent_path().parent_path());
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221 std::string p2 = ToString(d.parent_path());
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222 if (p1.length() == 2 &&
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223 p2.length() == 2 &&
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224 p1 == uuid.substr(0, 2) &&
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225 p2 == uuid.substr(2, 2) &&
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226 p0 == root_)
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227 {
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228 result.insert(uuid);
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229 }
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230 }
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231 }
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232 catch (fs::filesystem_error&)
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233 {
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234 }
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235 }
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236 }
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237 }
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238 }
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239
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240
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241 void FilesystemStorage::Clear()
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242 {
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243 namespace fs = boost::filesystem;
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244 typedef std::set<std::string> List;
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245
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246 List result;
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247 ListAllFiles(result);
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248
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249 for (List::const_iterator it = result.begin(); it != result.end(); ++it)
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250 {
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251 Remove(*it, FileContentType_Unknown /*ignored in this class*/);
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252 }
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253 }
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254
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255
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256 void FilesystemStorage::Remove(const std::string& uuid,
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257 FileContentType type)
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258 {
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259 LOG(INFO) << "Deleting attachment \"" << uuid << "\" of type " << static_cast<int>(type);
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260
0
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261 namespace fs = boost::filesystem;
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262
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263 fs::path p = GetPath(uuid);
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264
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265 try
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266 {
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267 fs::remove(p);
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268 }
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269 catch (...)
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270 {
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271 // Ignore the error
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272 }
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273
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274 // Remove the two parent directories, ignoring the error code if
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275 // these directories are not empty
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276
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277 try
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278 {
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279 #if BOOST_HAS_FILESYSTEM_V3 == 1
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280 boost::system::error_code err;
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281 fs::remove(p.parent_path(), err);
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282 fs::remove(p.parent_path().parent_path(), err);
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283 #else
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284 fs::remove(p.parent_path());
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285 fs::remove(p.parent_path().parent_path());
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286 #endif
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287 }
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288 catch (...)
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289 {
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290 // Ignore the error
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291 }
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292 }
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293
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294
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295 uintmax_t FilesystemStorage::GetCapacity() const
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296 {
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297 return boost::filesystem::space(root_).capacity;
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298 }
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299
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300 uintmax_t FilesystemStorage::GetAvailableSpace() const
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301 {
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302 return boost::filesystem::space(root_).available;
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303 }
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304
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305
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306 #if ORTHANC_BUILDING_FRAMEWORK_LIBRARY == 1
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307 FilesystemStorage::FilesystemStorage(std::string root) :
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308 fsyncOnWrite_(false)
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309 {
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310 Setup(root);
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311 }
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312 #endif
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313
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314
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315 #if ORTHANC_BUILDING_FRAMEWORK_LIBRARY == 1
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316 void FilesystemStorage::Read(std::string& content,
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317 const std::string& uuid,
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318 FileContentType type)
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319 {
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320 std::unique_ptr<IMemoryBuffer> buffer(Read(uuid, type));
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321 buffer->MoveToString(content);
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322 }
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323 #endif
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324 }