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annotate OrthancFramework/Sources/TemporaryFile.cpp @ 4764:cc02a2aa8bab

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integration Orthanc-1.9.6->mainline
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 09 Aug 2021 08:50:04 +0200
parents d9473bd5ed43
children 7053502fbf97
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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) 2017-2021 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 "TemporaryFile.h"
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26 #include "OrthancException.h"
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27 #include "SystemToolbox.h"
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28 #include "Toolbox.h"
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29
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30 #include <boost/filesystem.hpp>
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31 #include <boost/lexical_cast.hpp>
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32
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33 namespace Orthanc
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34 {
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35 static std::string CreateTemporaryPath(const char* temporaryDirectory,
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36 const char* extension)
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37 {
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38 boost::filesystem::path dir;
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39
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40 if (temporaryDirectory == NULL)
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41 {
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42 #if BOOST_HAS_FILESYSTEM_V3 == 1
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43 dir = boost::filesystem::temp_directory_path();
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44 #elif defined(__linux__)
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45 dir = "/tmp";
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46 #else
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47 # error Support your platform here
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48 #endif
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49 }
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50 else
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51 {
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52 dir = temporaryDirectory;
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53 }
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54
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55 // We use UUID to create unique path to temporary files
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56 const std::string uuid = Toolbox::GenerateUuid();
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58 // New in Orthanc 1.5.8: Prefix the process ID to the name of the
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59 // temporary files, in order to locate orphan temporary files that
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60 // were left by instances of Orthanc that exited in non-clean way
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61 // https://groups.google.com/d/msg/orthanc-users/MSJX53bw6Lw/d3S3lRRLAwAJ
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62 std::string filename = "Orthanc-" + boost::lexical_cast<std::string>(SystemToolbox::GetProcessId()) + "-" + uuid;
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63
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64 if (extension != NULL)
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65 {
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66 filename.append(extension);
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67 }
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68
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69 dir /= filename;
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70 return dir.string();
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71 }
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73
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74 TemporaryFile::TemporaryFile() :
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75 path_(CreateTemporaryPath(NULL, NULL))
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76 {
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77 }
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80 TemporaryFile::TemporaryFile(const std::string& temporaryDirectory,
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81 const std::string& extension) :
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82 path_(CreateTemporaryPath(temporaryDirectory.c_str(), extension.c_str()))
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83 {
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84 }
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86
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87 TemporaryFile::~TemporaryFile()
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88 {
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89 boost::filesystem::remove(path_);
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90 }
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91
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92 const std::string &TemporaryFile::GetPath() const
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93 {
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94 return path_;
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95 }
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96
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98 void TemporaryFile::Write(const std::string& content)
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99 {
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100 try
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101 {
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102 SystemToolbox::WriteFile(content, path_);
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103 }
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104 catch (OrthancException& e)
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105 {
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106 throw OrthancException(e.GetErrorCode(),
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107 "Can't create temporary file \"" + path_ +
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108 "\" with " + boost::lexical_cast<std::string>(content.size()) +
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109 " bytes: Check you have write access to the "
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110 "temporary directory and that it is not full");
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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 TemporaryFile::Read(std::string& content) const
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116 {
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117 try
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118 {
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119 SystemToolbox::ReadFile(content, path_);
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120 }
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121 catch (OrthancException& e)
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122 {
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123 throw OrthancException(e.GetErrorCode(),
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124 "Can't read temporary file \"" + path_ +
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125 "\": Another process has corrupted the temporary directory");
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126 }
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127 }
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128
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129
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130 void TemporaryFile::Touch()
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131 {
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132 std::string empty;
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133 Write(empty);
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134 }
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135
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136
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137 uint64_t TemporaryFile::GetFileSize() const
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138 {
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139 return SystemToolbox::GetFileSize(path_);
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140 }
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141
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142
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143 void TemporaryFile::ReadRange(std::string& content,
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144 uint64_t start,
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145 uint64_t end,
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146 bool throwIfOverflow) const
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147 {
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148 SystemToolbox::ReadFileRange(content, path_, start, end, throwIfOverflow);
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149 }
0
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150 }