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annotate OrthancFramework/Sources/TemporaryFile.cpp @ 4184:dbd74fa2f446

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Enable the access to raw frames in Philips ELSCINT1 proprietary compression
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 12 Sep 2020 16:03:48 +0200
parents bf7b9edf6b81
children b313a0001893
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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 "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
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32 namespace Orthanc
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33 {
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34 static std::string CreateTemporaryPath(const char* temporaryDirectory,
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35 const char* extension)
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36 {
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37 boost::filesystem::path dir;
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38
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39 if (temporaryDirectory == NULL)
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40 {
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41 #if BOOST_HAS_FILESYSTEM_V3 == 1
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42 dir = boost::filesystem::temp_directory_path();
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43 #elif defined(__linux__)
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44 dir = "/tmp";
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45 #else
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46 # error Support your platform here
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47 #endif
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48 }
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49 else
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50 {
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51 dir = temporaryDirectory;
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52 }
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53
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54 // We use UUID to create unique path to temporary files
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55 const std::string uuid = Orthanc::Toolbox::GenerateUuid();
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57 // New in Orthanc 1.5.8: Prefix the process ID to the name of the
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58 // temporary files, in order to locate orphan temporary files that
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59 // were left by instances of Orthanc that exited in non-clean way
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60 // https://groups.google.com/d/msg/orthanc-users/MSJX53bw6Lw/d3S3lRRLAwAJ
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61 std::string filename = "Orthanc-" + boost::lexical_cast<std::string>(SystemToolbox::GetProcessId()) + "-" + uuid;
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62
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63 if (extension != NULL)
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64 {
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65 filename.append(extension);
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66 }
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68 dir /= filename;
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69 return dir.string();
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70 }
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72
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73 TemporaryFile::TemporaryFile() :
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74 path_(CreateTemporaryPath(NULL, NULL))
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75 {
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76 }
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79 TemporaryFile::TemporaryFile(const std::string& temporaryDirectory,
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80 const std::string& extension) :
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81 path_(CreateTemporaryPath(temporaryDirectory.c_str(), extension.c_str()))
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82 {
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83 }
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85
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86 TemporaryFile::~TemporaryFile()
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87 {
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88 boost::filesystem::remove(path_);
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89 }
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92 void TemporaryFile::Write(const std::string& content)
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93 {
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94 try
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95 {
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96 SystemToolbox::WriteFile(content, path_);
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97 }
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98 catch (OrthancException& e)
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99 {
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100 throw OrthancException(e.GetErrorCode(),
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101 "Can't create temporary file \"" + path_ +
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102 "\" with " + boost::lexical_cast<std::string>(content.size()) +
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103 " bytes: Check you have write access to the "
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104 "temporary directory and that it is not full");
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105 }
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106 }
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108
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109 void TemporaryFile::Read(std::string& content) const
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110 {
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111 try
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112 {
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113 SystemToolbox::ReadFile(content, path_);
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114 }
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115 catch (OrthancException& e)
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116 {
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117 throw OrthancException(e.GetErrorCode(),
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118 "Can't read temporary file \"" + path_ +
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119 "\": Another process has corrupted the temporary directory");
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120 }
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121 }
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122
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123
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124 void TemporaryFile::Touch()
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125 {
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126 std::string empty;
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127 Write(empty);
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128 }
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129 }