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annotate OrthancFramework/Sources/TemporaryFile.cpp @ 5342:65d55cc86a41

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clarified error message
author Alain Mazy <am@osimis.io>
date Wed, 28 Jun 2023 11:54:41 +0200
parents 0ea402b4d901
children 48b8dae6dc77
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "PrecompiledHeaders.h"
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25 #include "TemporaryFile.h"
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27 #include "OrthancException.h"
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28 #include "SystemToolbox.h"
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29 #include "Toolbox.h"
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30
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31 #include <boost/filesystem.hpp>
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32 #include <boost/lexical_cast.hpp>
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33
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34 namespace Orthanc
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35 {
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36 static std::string CreateTemporaryPath(const char* temporaryDirectory,
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37 const char* extension)
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38 {
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39 boost::filesystem::path dir;
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41 if (temporaryDirectory == NULL)
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42 {
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43 #if BOOST_HAS_FILESYSTEM_V3 == 1
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44 dir = boost::filesystem::temp_directory_path();
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45 #elif defined(__linux__)
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46 dir = "/tmp";
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47 #else
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48 # error Support your platform here
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49 #endif
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50 }
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51 else
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52 {
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53 dir = temporaryDirectory;
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54 }
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55
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56 // We use UUID to create unique path to temporary files
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57 const std::string uuid = Toolbox::GenerateUuid();
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58
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59 // New in Orthanc 1.5.8: Prefix the process ID to the name of the
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60 // temporary files, in order to locate orphan temporary files that
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61 // were left by instances of Orthanc that exited in non-clean way
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62 // https://groups.google.com/d/msg/orthanc-users/MSJX53bw6Lw/d3S3lRRLAwAJ
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63 std::string filename = "Orthanc-" + boost::lexical_cast<std::string>(SystemToolbox::GetProcessId()) + "-" + uuid;
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64
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65 if (extension != NULL)
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66 {
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67 filename.append(extension);
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68 }
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69
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70 dir /= filename;
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71 return dir.string();
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72 }
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74
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75 TemporaryFile::TemporaryFile() :
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76 path_(CreateTemporaryPath(NULL, NULL))
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77 {
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78 }
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80
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81 TemporaryFile::TemporaryFile(const std::string& temporaryDirectory,
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82 const std::string& extension) :
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83 path_(CreateTemporaryPath(temporaryDirectory.c_str(), extension.c_str()))
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84 {
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85 }
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87
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88 TemporaryFile::~TemporaryFile()
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89 {
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90 boost::filesystem::remove(path_);
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91 }
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92
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93 const std::string &TemporaryFile::GetPath() const
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94 {
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95 return path_;
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96 }
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97
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99 void TemporaryFile::Write(const std::string& content)
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100 {
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101 try
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102 {
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103 SystemToolbox::WriteFile(content, path_);
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104 }
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105 catch (OrthancException& e)
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106 {
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107 throw OrthancException(e.GetErrorCode(),
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108 "Can't create temporary file \"" + path_ +
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109 "\" with " + boost::lexical_cast<std::string>(content.size()) +
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110 " bytes: Check you have write access to the "
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111 "temporary directory and that it is not full");
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112 }
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113 }
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114
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115
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116 void TemporaryFile::Read(std::string& content) const
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117 {
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118 try
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119 {
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120 SystemToolbox::ReadFile(content, path_);
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121 }
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122 catch (OrthancException& e)
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123 {
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124 throw OrthancException(e.GetErrorCode(),
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125 "Can't read temporary file \"" + path_ +
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126 "\": Another process has corrupted the temporary directory");
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127 }
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128 }
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129
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130
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131 void TemporaryFile::Touch()
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132 {
6fd38327e777 Fix issue #130 (Orthanc failed to start when /tmp partition was full)
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133 std::string empty;
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134 Write(empty);
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135 }
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136
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137
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138 uint64_t TemporaryFile::GetFileSize() const
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139 {
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140 return SystemToolbox::GetFileSize(path_);
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141 }
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142
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143
52166629239f SystemToolbox::ReadFileRange()
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144 void TemporaryFile::ReadRange(std::string& content,
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145 uint64_t start,
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146 uint64_t end,
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147 bool throwIfOverflow) const
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148 {
52166629239f SystemToolbox::ReadFileRange()
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149 SystemToolbox::ReadFileRange(content, path_, start, end, throwIfOverflow);
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150 }
0
3959d33612cc initial commit
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151 }