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annotate OrthancFramework/Sources/FileStorage/FilesystemStorage.cpp @ 4231:290ffcb0a147

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publishing the DICOM hierarchy as WebDAV bucket
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 06 Oct 2020 20:55:16 +0200
parents b289a1234822
children 0034f855c023
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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) 2017-2020 Osimis S.A., 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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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22
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23 #include "../PrecompiledHeaders.h"
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24 #include "FilesystemStorage.h"
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26 // http://stackoverflow.com/questions/1576272/storing-large-number-of-files-in-file-system
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27 // http://stackoverflow.com/questions/446358/storing-a-large-number-of-images
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28
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29 #include "../Logging.h"
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30 #include "../OrthancException.h"
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31 #include "../Toolbox.h"
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32 #include "../SystemToolbox.h"
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34 #include <boost/filesystem/fstream.hpp>
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35
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37 static std::string ToString(const boost::filesystem::path& p)
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38 {
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39 #if BOOST_HAS_FILESYSTEM_V3 == 1
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40 return p.filename().string();
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41 #else
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42 return p.filename();
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43 #endif
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44 }
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46
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47 namespace Orthanc
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48 {
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49 boost::filesystem::path FilesystemStorage::GetPath(const std::string& uuid) const
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50 {
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51 namespace fs = boost::filesystem;
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52
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53 if (!Toolbox::IsUuid(uuid))
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54 {
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55 throw OrthancException(ErrorCode_ParameterOutOfRange);
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56 }
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58 fs::path path = root_;
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60 path /= std::string(&uuid[0], &uuid[2]);
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61 path /= std::string(&uuid[2], &uuid[4]);
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62 path /= uuid;
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63
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64 #if BOOST_HAS_FILESYSTEM_V3 == 1
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65 path.make_preferred();
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66 #endif
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68 return path;
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69 }
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70
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71 void FilesystemStorage::Setup(const std::string& root)
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72 {
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73 //root_ = boost::filesystem::absolute(root).string();
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74 root_ = root;
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76 SystemToolbox::MakeDirectory(root);
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77 }
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81 static const char* GetDescriptionInternal(FileContentType content)
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82 {
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83 // This function is for logging only (internal use), a more
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84 // fully-featured version is available in ServerEnumerations.cpp
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85 switch (content)
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86 {
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87 case FileContentType_Unknown:
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88 return "Unknown";
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90 case FileContentType_Dicom:
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91 return "DICOM";
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93 case FileContentType_DicomAsJson:
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94 return "JSON summary of DICOM";
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96 default:
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97 return "User-defined";
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98 }
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99 }
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101
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102 void FilesystemStorage::Create(const std::string& uuid,
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103 const void* content,
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104 size_t size,
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105 FileContentType type)
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106 {
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107 LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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108 << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)";
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109
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110 boost::filesystem::path path;
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111
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112 path = GetPath(uuid);
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113
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114 if (boost::filesystem::exists(path))
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115 {
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116 // Extremely unlikely case: This Uuid has already been created
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117 // in the past.
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118 throw OrthancException(ErrorCode_InternalError);
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119 }
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120
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121 if (boost::filesystem::exists(path.parent_path()))
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122 {
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123 if (!boost::filesystem::is_directory(path.parent_path()))
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124 {
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125 throw OrthancException(ErrorCode_DirectoryOverFile);
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126 }
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127 }
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128 else
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129 {
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130 if (!boost::filesystem::create_directories(path.parent_path()))
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131 {
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132 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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133 }
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134 }
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135
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136 SystemToolbox::WriteFile(content, size, path.string(), fsyncOnWrite_);
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137 }
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138
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139
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140 void FilesystemStorage::Read(std::string& content,
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141 const std::string& uuid,
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142 FileContentType type)
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143 {
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144 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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145 << "\" content type";
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146
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147 content.clear();
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148 SystemToolbox::ReadFile(content, GetPath(uuid).string());
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149 }
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150
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151
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152 uintmax_t FilesystemStorage::GetSize(const std::string& uuid) const
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153 {
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154 boost::filesystem::path path = GetPath(uuid);
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155 return boost::filesystem::file_size(path);
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156 }
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157
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158
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159
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160 void FilesystemStorage::ListAllFiles(std::set<std::string>& result) const
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161 {
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162 namespace fs = boost::filesystem;
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163
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164 result.clear();
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165
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166 if (fs::exists(root_) && fs::is_directory(root_))
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167 {
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168 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current)
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169 {
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170 if (SystemToolbox::IsRegularFile(current->path().string()))
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171 {
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172 try
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173 {
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174 fs::path d = current->path();
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175 std::string uuid = ToString(d);
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176 if (Toolbox::IsUuid(uuid))
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177 {
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178 fs::path p0 = d.parent_path().parent_path().parent_path();
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179 std::string p1 = ToString(d.parent_path().parent_path());
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180 std::string p2 = ToString(d.parent_path());
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181 if (p1.length() == 2 &&
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182 p2.length() == 2 &&
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183 p1 == uuid.substr(0, 2) &&
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184 p2 == uuid.substr(2, 2) &&
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185 p0 == root_)
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186 {
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187 result.insert(uuid);
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188 }
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189 }
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190 }
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191 catch (fs::filesystem_error&)
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192 {
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193 }
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194 }
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195 }
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196 }
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197 }
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198
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199
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200 void FilesystemStorage::Clear()
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201 {
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202 namespace fs = boost::filesystem;
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203 typedef std::set<std::string> List;
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204
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205 List result;
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206 ListAllFiles(result);
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207
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208 for (List::const_iterator it = result.begin(); it != result.end(); ++it)
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209 {
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210 Remove(*it, FileContentType_Unknown /*ignored in this class*/);
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211 }
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212 }
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213
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214
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215 void FilesystemStorage::Remove(const std::string& uuid,
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216 FileContentType type)
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217 {
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218 LOG(INFO) << "Deleting attachment \"" << uuid << "\" of type " << static_cast<int>(type);
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219
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220 namespace fs = boost::filesystem;
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221
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222 fs::path p = GetPath(uuid);
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223
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224 try
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225 {
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226 fs::remove(p);
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227 }
148
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228 catch (...)
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229 {
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230 // Ignore the error
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231 }
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232
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233 // Remove the two parent directories, ignoring the error code if
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234 // these directories are not empty
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235
142
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236 try
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237 {
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238 #if BOOST_HAS_FILESYSTEM_V3 == 1
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239 boost::system::error_code err;
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240 fs::remove(p.parent_path(), err);
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241 fs::remove(p.parent_path().parent_path(), err);
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242 #else
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243 fs::remove(p.parent_path());
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244 fs::remove(p.parent_path().parent_path());
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245 #endif
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246 }
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247 catch (...)
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248 {
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249 // Ignore the error
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250 }
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251 }
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252
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253
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254 uintmax_t FilesystemStorage::GetCapacity() const
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255 {
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256 return boost::filesystem::space(root_).capacity;
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257 }
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258
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259 uintmax_t FilesystemStorage::GetAvailableSpace() const
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260 {
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261 return boost::filesystem::space(root_).available;
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262 }
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263 }