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annotate OrthancFramework/Sources/FileStorage/FilesystemStorage.cpp @ 4342:52166629239f

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SystemToolbox::ReadFileRange()
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 03 Dec 2020 18:48:06 +0100
parents b30a8de92ad9
children d9473bd5ed43
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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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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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36
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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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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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78
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79 FilesystemStorage::FilesystemStorage(const std::string &root) :
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80 fsyncOnWrite_(false)
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81 {
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82 Setup(root);
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83 }
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84
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85 FilesystemStorage::FilesystemStorage(const std::string &root,
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86 bool fsyncOnWrite) :
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87 fsyncOnWrite_(fsyncOnWrite)
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88 {
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89 Setup(root);
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90 }
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93
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94 static const char* GetDescriptionInternal(FileContentType content)
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95 {
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96 // This function is for logging only (internal use), a more
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97 // fully-featured version is available in ServerEnumerations.cpp
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98 switch (content)
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99 {
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100 case FileContentType_Unknown:
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101 return "Unknown";
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102
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103 case FileContentType_Dicom:
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104 return "DICOM";
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105
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106 case FileContentType_DicomAsJson:
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107 return "JSON summary of DICOM";
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108
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109 default:
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110 return "User-defined";
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111 }
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112 }
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113
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114
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115 void FilesystemStorage::Create(const std::string& uuid,
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116 const void* content,
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117 size_t size,
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118 FileContentType type)
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119 {
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120 LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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121 << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)";
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122
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123 boost::filesystem::path path;
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124
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125 path = GetPath(uuid);
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126
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127 if (boost::filesystem::exists(path))
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128 {
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129 // Extremely unlikely case: This Uuid has already been created
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130 // in the past.
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131 throw OrthancException(ErrorCode_InternalError);
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132 }
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133
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134 if (boost::filesystem::exists(path.parent_path()))
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135 {
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136 if (!boost::filesystem::is_directory(path.parent_path()))
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137 {
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138 throw OrthancException(ErrorCode_DirectoryOverFile);
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139 }
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140 }
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141 else
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142 {
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143 if (!boost::filesystem::create_directories(path.parent_path()))
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144 {
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145 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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146 }
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147 }
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148
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149 SystemToolbox::WriteFile(content, size, path.string(), fsyncOnWrite_);
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150 }
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151
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152
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153 void FilesystemStorage::Read(std::string& content,
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154 const std::string& uuid,
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155 FileContentType type)
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156 {
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157 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << GetDescriptionInternal(type)
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158 << "\" content type";
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159
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160 content.clear();
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161 SystemToolbox::ReadFile(content, GetPath(uuid).string());
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162 }
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163
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164
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165 uintmax_t FilesystemStorage::GetSize(const std::string& uuid) const
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166 {
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167 boost::filesystem::path path = GetPath(uuid);
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168 return boost::filesystem::file_size(path);
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169 }
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170
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171
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172
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173 void FilesystemStorage::ListAllFiles(std::set<std::string>& result) const
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174 {
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175 namespace fs = boost::filesystem;
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176
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177 result.clear();
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178
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179 if (fs::exists(root_) && fs::is_directory(root_))
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180 {
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181 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current)
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182 {
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183 if (SystemToolbox::IsRegularFile(current->path().string()))
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184 {
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185 try
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186 {
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187 fs::path d = current->path();
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188 std::string uuid = ToString(d);
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189 if (Toolbox::IsUuid(uuid))
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190 {
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191 fs::path p0 = d.parent_path().parent_path().parent_path();
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192 std::string p1 = ToString(d.parent_path().parent_path());
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193 std::string p2 = ToString(d.parent_path());
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194 if (p1.length() == 2 &&
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195 p2.length() == 2 &&
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196 p1 == uuid.substr(0, 2) &&
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197 p2 == uuid.substr(2, 2) &&
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198 p0 == root_)
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199 {
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200 result.insert(uuid);
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201 }
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202 }
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203 }
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204 catch (fs::filesystem_error&)
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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
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212
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213 void FilesystemStorage::Clear()
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214 {
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215 namespace fs = boost::filesystem;
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216 typedef std::set<std::string> List;
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217
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218 List result;
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219 ListAllFiles(result);
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220
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221 for (List::const_iterator it = result.begin(); it != result.end(); ++it)
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222 {
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223 Remove(*it, FileContentType_Unknown /*ignored in this class*/);
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224 }
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225 }
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226
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227
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228 void FilesystemStorage::Remove(const std::string& uuid,
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229 FileContentType type)
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230 {
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231 LOG(INFO) << "Deleting attachment \"" << uuid << "\" of type " << static_cast<int>(type);
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232
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233 namespace fs = boost::filesystem;
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234
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235 fs::path p = GetPath(uuid);
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236
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237 try
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238 {
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239 fs::remove(p);
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240 }
148
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241 catch (...)
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242 {
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243 // Ignore the error
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244 }
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245
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246 // Remove the two parent directories, ignoring the error code if
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247 // these directories are not empty
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248
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249 try
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250 {
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251 #if BOOST_HAS_FILESYSTEM_V3 == 1
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252 boost::system::error_code err;
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253 fs::remove(p.parent_path(), err);
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254 fs::remove(p.parent_path().parent_path(), err);
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255 #else
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256 fs::remove(p.parent_path());
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257 fs::remove(p.parent_path().parent_path());
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258 #endif
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259 }
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260 catch (...)
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261 {
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262 // Ignore the error
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263 }
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264 }
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265
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266
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267 uintmax_t FilesystemStorage::GetCapacity() const
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268 {
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269 return boost::filesystem::space(root_).capacity;
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270 }
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271
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272 uintmax_t FilesystemStorage::GetAvailableSpace() const
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273 {
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274 return boost::filesystem::space(root_).available;
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275 }
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276
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277
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278 #if ORTHANC_BUILDING_FRAMEWORK_LIBRARY == 1
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279 FilesystemStorage::FilesystemStorage(std::string root) :
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280 fsyncOnWrite_(false)
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281 {
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282 Setup(root);
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283 }
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284 #endif
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285 }