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annotate Core/FileStorage/FilesystemStorage.cpp @ 2421:d0fe5ec7eb05

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playing with dicomdir
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sun, 08 Oct 2017 11:13:56 +0200
parents a3a65de1840f
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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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "FilesystemStorage.h"
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37 // http://stackoverflow.com/questions/1576272/storing-large-number-of-files-in-file-system
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38 // http://stackoverflow.com/questions/446358/storing-a-large-number-of-images
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39
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40 #include "../Logging.h"
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41 #include "../OrthancException.h"
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42 #include "../Toolbox.h"
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43 #include "../SystemToolbox.h"
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45 #include <boost/filesystem/fstream.hpp>
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47
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48 static std::string ToString(const boost::filesystem::path& p)
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49 {
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50 #if BOOST_HAS_FILESYSTEM_V3 == 1
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51 return p.filename().string();
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52 #else
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53 return p.filename();
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54 #endif
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55 }
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57
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58 namespace Orthanc
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59 {
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60 boost::filesystem::path FilesystemStorage::GetPath(const std::string& uuid) const
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61 {
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62 namespace fs = boost::filesystem;
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64 if (!Toolbox::IsUuid(uuid))
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65 {
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66 throw OrthancException(ErrorCode_ParameterOutOfRange);
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67 }
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69 fs::path path = root_;
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71 path /= std::string(&uuid[0], &uuid[2]);
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72 path /= std::string(&uuid[2], &uuid[4]);
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73 path /= uuid;
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74
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75 #if BOOST_HAS_FILESYSTEM_V3 == 1
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76 path.make_preferred();
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77 #endif
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79 return path;
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80 }
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81
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82 FilesystemStorage::FilesystemStorage(std::string root)
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83 {
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84 //root_ = boost::filesystem::absolute(root).string();
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85 root_ = root;
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86
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87 SystemToolbox::MakeDirectory(root);
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88 }
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91
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92 static const char* GetDescriptionInternal(FileContentType content)
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93 {
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94 // This function is for logging only (internal use), a more
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95 // fully-featured version is available in ServerEnumerations.cpp
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96 switch (content)
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97 {
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98 case FileContentType_Unknown:
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99 return "Unknown";
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100
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101 case FileContentType_Dicom:
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102 return "DICOM";
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103
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104 case FileContentType_DicomAsJson:
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105 return "JSON summary of DICOM";
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106
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107 default:
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108 return "User-defined";
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109 }
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110 }
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112
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113 void FilesystemStorage::Create(const std::string& uuid,
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114 const void* content,
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115 size_t size,
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116 FileContentType type)
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117 {
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118 LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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119 << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)";
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120
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121 boost::filesystem::path path;
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122
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123 path = GetPath(uuid);
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124
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125 if (boost::filesystem::exists(path))
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126 {
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127 // Extremely unlikely case: This Uuid has already been created
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128 // in the past.
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129 throw OrthancException(ErrorCode_InternalError);
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130 }
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131
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132 if (boost::filesystem::exists(path.parent_path()))
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133 {
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134 if (!boost::filesystem::is_directory(path.parent_path()))
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135 {
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136 throw OrthancException(ErrorCode_DirectoryOverFile);
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137 }
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138 }
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139 else
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140 {
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141 if (!boost::filesystem::create_directories(path.parent_path()))
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142 {
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143 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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144 }
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145 }
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146
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147 SystemToolbox::WriteFile(content, size, path.string());
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148 }
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149
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150
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151 void FilesystemStorage::Read(std::string& content,
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152 const std::string& uuid,
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153 FileContentType type)
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154 {
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155 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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156 << "\" content type";
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157
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158 content.clear();
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159 SystemToolbox::ReadFile(content, GetPath(uuid).string());
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160 }
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161
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162
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163 uintmax_t FilesystemStorage::GetSize(const std::string& uuid) const
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164 {
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165 boost::filesystem::path path = GetPath(uuid);
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166 return boost::filesystem::file_size(path);
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167 }
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168
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169
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170
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171 void FilesystemStorage::ListAllFiles(std::set<std::string>& result) const
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172 {
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173 namespace fs = boost::filesystem;
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174
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175 result.clear();
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176
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177 if (fs::exists(root_) && fs::is_directory(root_))
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178 {
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179 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current)
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180 {
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181 if (SystemToolbox::IsRegularFile(current->path().string()))
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182 {
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183 try
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184 {
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185 fs::path d = current->path();
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186 std::string uuid = ToString(d);
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187 if (Toolbox::IsUuid(uuid))
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188 {
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189 fs::path p0 = d.parent_path().parent_path().parent_path();
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190 std::string p1 = ToString(d.parent_path().parent_path());
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191 std::string p2 = ToString(d.parent_path());
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192 if (p1.length() == 2 &&
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193 p2.length() == 2 &&
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194 p1 == uuid.substr(0, 2) &&
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195 p2 == uuid.substr(2, 2) &&
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196 p0 == root_)
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197 {
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198 result.insert(uuid);
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199 }
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200 }
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201 }
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202 catch (fs::filesystem_error)
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203 {
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204 }
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205 }
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206 }
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207 }
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208 }
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209
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210
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211 void FilesystemStorage::Clear()
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212 {
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213 namespace fs = boost::filesystem;
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214 typedef std::set<std::string> List;
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215
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216 List result;
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217 ListAllFiles(result);
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218
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219 for (List::const_iterator it = result.begin(); it != result.end(); ++it)
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220 {
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221 Remove(*it, FileContentType_Unknown /*ignored in this class*/);
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222 }
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223 }
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224
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225
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226 void FilesystemStorage::Remove(const std::string& uuid,
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227 FileContentType type)
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228 {
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229 LOG(INFO) << "Deleting attachment \"" << uuid << "\" of type " << static_cast<int>(type);
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230
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231 namespace fs = boost::filesystem;
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232
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233 fs::path p = GetPath(uuid);
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234
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235 try
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236 {
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237 fs::remove(p);
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238 }
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239 catch (...)
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240 {
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241 // Ignore the error
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242 }
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243
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244 // Remove the two parent directories, ignoring the error code if
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245 // these directories are not empty
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246
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247 try
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248 {
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249 #if BOOST_HAS_FILESYSTEM_V3 == 1
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250 boost::system::error_code err;
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251 fs::remove(p.parent_path(), err);
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252 fs::remove(p.parent_path().parent_path(), err);
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253 #else
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254 fs::remove(p.parent_path());
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255 fs::remove(p.parent_path().parent_path());
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256 #endif
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257 }
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258 catch (...)
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259 {
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260 // Ignore the error
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261 }
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262 }
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263
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264
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265 uintmax_t FilesystemStorage::GetCapacity() const
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266 {
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267 return boost::filesystem::space(root_).capacity;
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268 }
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269
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270 uintmax_t FilesystemStorage::GetAvailableSpace() const
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271 {
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272 return boost::filesystem::space(root_).available;
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273 }
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274 }