Mercurial > hg > orthanc

annotate Core/FileStorage/FilesystemStorage.cpp @ 2099:bcbc9137a535

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refactoring
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 07 Oct 2016 11:13:41 +0200
parents e9e6ffbf0fd5
children 0c09d1af22f3
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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 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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32
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33 #include "../PrecompiledHeaders.h"
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34 #include "FilesystemStorage.h"
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36 // http://stackoverflow.com/questions/1576272/storing-large-number-of-files-in-file-system
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37 // http://stackoverflow.com/questions/446358/storing-a-large-number-of-images
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38
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39 #include "../Logging.h"
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40 #include "../OrthancException.h"
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41 #include "../Toolbox.h"
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42 #include "../Uuid.h"
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44 #include <boost/filesystem/fstream.hpp>
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45
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46
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47 static std::string ToString(const boost::filesystem::path& p)
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48 {
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49 #if BOOST_HAS_FILESYSTEM_V3 == 1
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50 return p.filename().string();
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51 #else
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52 return p.filename();
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53 #endif
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54 }
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56
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57 namespace Orthanc
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58 {
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59 boost::filesystem::path FilesystemStorage::GetPath(const std::string& uuid) const
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60 {
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61 namespace fs = boost::filesystem;
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62
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63 if (!Toolbox::IsUuid(uuid))
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64 {
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65 throw OrthancException(ErrorCode_ParameterOutOfRange);
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66 }
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68 fs::path path = root_;
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70 path /= std::string(&uuid[0], &uuid[2]);
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71 path /= std::string(&uuid[2], &uuid[4]);
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72 path /= uuid;
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73
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74 #if BOOST_HAS_FILESYSTEM_V3 == 1
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75 path.make_preferred();
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76 #endif
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78 return path;
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79 }
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80
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81 FilesystemStorage::FilesystemStorage(std::string root)
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82 {
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83 //root_ = boost::filesystem::absolute(root).string();
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84 root_ = root;
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85
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86 Toolbox::MakeDirectory(root);
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87 }
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91 static const char* GetDescriptionInternal(FileContentType content)
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92 {
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93 // This function is for logging only (internal use), a more
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94 // fully-featured version is available in ServerEnumerations.cpp
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95 switch (content)
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96 {
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97 case FileContentType_Unknown:
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98 return "Unknown";
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99
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100 case FileContentType_Dicom:
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101 return "DICOM";
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102
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103 case FileContentType_DicomAsJson:
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104 return "JSON summary of DICOM";
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105
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106 default:
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107 return "User-defined";
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108 }
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109 }
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111
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112 void FilesystemStorage::Create(const std::string& uuid,
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113 const void* content,
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114 size_t size,
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115 FileContentType type)
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116 {
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117 LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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118 << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)";
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119
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120 boost::filesystem::path path;
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121
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122 path = GetPath(uuid);
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123
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124 if (boost::filesystem::exists(path))
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125 {
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126 // Extremely unlikely case: This Uuid has already been created
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127 // in the past.
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128 throw OrthancException(ErrorCode_InternalError);
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129 }
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130
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131 if (boost::filesystem::exists(path.parent_path()))
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132 {
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133 if (!boost::filesystem::is_directory(path.parent_path()))
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134 {
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135 throw OrthancException(ErrorCode_DirectoryOverFile);
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136 }
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137 }
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138 else
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139 {
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140 if (!boost::filesystem::create_directories(path.parent_path()))
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141 {
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142 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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143 }
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144 }
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145
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146 Toolbox::WriteFile(content, size, path.string());
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147 }
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148
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149
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150 void FilesystemStorage::Read(std::string& content,
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151 const std::string& uuid,
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152 FileContentType type)
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153 {
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154 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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155 << "\" content type";
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156
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157 content.clear();
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158 Toolbox::ReadFile(content, GetPath(uuid).string());
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159 }
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160
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161
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162 uintmax_t FilesystemStorage::GetSize(const std::string& uuid) const
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163 {
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164 boost::filesystem::path path = GetPath(uuid);
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165 return boost::filesystem::file_size(path);
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166 }
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167
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168
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169
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170 void FilesystemStorage::ListAllFiles(std::set<std::string>& result) const
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171 {
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172 namespace fs = boost::filesystem;
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173
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174 result.clear();
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175
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176 if (fs::exists(root_) && fs::is_directory(root_))
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177 {
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178 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current)
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179 {
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180 if (Toolbox::IsRegularFile(current->path().string()))
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181 {
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182 try
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183 {
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184 fs::path d = current->path();
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185 std::string uuid = ToString(d);
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186 if (Toolbox::IsUuid(uuid))
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187 {
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188 fs::path p0 = d.parent_path().parent_path().parent_path();
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189 std::string p1 = ToString(d.parent_path().parent_path());
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190 std::string p2 = ToString(d.parent_path());
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191 if (p1.length() == 2 &&
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192 p2.length() == 2 &&
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193 p1 == uuid.substr(0, 2) &&
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194 p2 == uuid.substr(2, 2) &&
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195 p0 == root_)
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196 {
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197 result.insert(uuid);
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198 }
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199 }
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200 }
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201 catch (fs::filesystem_error)
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202 {
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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 void FilesystemStorage::Clear()
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211 {
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212 namespace fs = boost::filesystem;
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213 typedef std::set<std::string> List;
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214
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215 List result;
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216 ListAllFiles(result);
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217
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218 for (List::const_iterator it = result.begin(); it != result.end(); ++it)
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219 {
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220 Remove(*it, FileContentType_Unknown /*ignored in this class*/);
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221 }
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222 }
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223
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224
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225 void FilesystemStorage::Remove(const std::string& uuid,
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226 FileContentType /*type*/)
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227 {
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228 LOG(INFO) << "Deleting attachment \"" << uuid << "\"";
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229
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230 namespace fs = boost::filesystem;
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231
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232 fs::path p = GetPath(uuid);
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233
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234 try
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235 {
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236 fs::remove(p);
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237 }
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238 catch (...)
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239 {
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240 // Ignore the error
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241 }
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242
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243 // Remove the two parent directories, ignoring the error code if
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244 // these directories are not empty
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245
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246 try
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247 {
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248 #if BOOST_HAS_FILESYSTEM_V3 == 1
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249 boost::system::error_code err;
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250 fs::remove(p.parent_path(), err);
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251 fs::remove(p.parent_path().parent_path(), err);
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252 #else
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253 fs::remove(p.parent_path());
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254 fs::remove(p.parent_path().parent_path());
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255 #endif
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256 }
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257 catch (...)
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258 {
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259 // Ignore the error
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260 }
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261 }
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262
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263
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264 uintmax_t FilesystemStorage::GetCapacity() const
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265 {
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266 return boost::filesystem::space(root_).capacity;
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267 }
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268
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269 uintmax_t FilesystemStorage::GetAvailableSpace() const
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270 {
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271 return boost::filesystem::space(root_).available;
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272 }
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273 }