72
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1 /**
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2 * SPDX-FileCopyrightText: 2023-2024 Sebastien Jodogne, UCLouvain, Belgium
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3 * SPDX-License-Identifier: GPL-3.0-or-later
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4 */
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5
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6 /**
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7 * STL plugin for Orthanc
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8 * Copyright (C) 2023-2024 Sebastien Jodogne, UCLouvain, Belgium
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9 *
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10 * This program is free software: you can redistribute it and/or
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11 * modify it under the terms of the GNU General Public License as
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12 * published by the Free Software Foundation, either version 3 of the
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13 * License, or (at your option) any later version.
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14 *
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15 * This program is distributed in the hope that it will be useful, but
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16 * WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 * General Public License for more details.
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19 *
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20 * You should have received a copy of the GNU General Public License
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21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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22 **/
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23
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24
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25 #include "ResourcesCache.h"
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26
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27 #include "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
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28
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29 #include <Compatibility.h>
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30 #include <SystemToolbox.h>
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31
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32
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33 // Forward declaration
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34 void ReadStaticAsset(std::string& target,
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35 const std::string& path);
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36
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37
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38 class ResourcesCache::RestOutputHandler : public IHandler
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39 {
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40 private:
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41 OrthancPluginRestOutput* output_;
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42 std::string mime_;
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43
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44 public:
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45 RestOutputHandler(OrthancPluginRestOutput* output,
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46 const std::string& mime) :
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47 output_(output),
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48 mime_(mime)
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49 {
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50 }
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51
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52 virtual void Apply(const std::string& resource) ORTHANC_OVERRIDE
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53 {
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54 OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output_,
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55 resource.c_str(), resource.size(), mime_.c_str());
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56 }
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57 };
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58
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59
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60 class ResourcesCache::StoreResourceIntoString : public IHandler
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61 {
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62 private:
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63 std::string& target_;
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64
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65 public:
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66 StoreResourceIntoString(std::string& target) :
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67 target_(target)
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68 {
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69 }
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70
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71 virtual void Apply(const std::string& resource) ORTHANC_OVERRIDE
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72 {
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73 target_ = resource;
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74 }
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75 };
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76
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77
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78 ResourcesCache::~ResourcesCache()
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79 {
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80 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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81 {
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82 assert(it->second != NULL);
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83 delete it->second;
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84 }
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85 }
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86
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87
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88 void ResourcesCache::Apply(IHandler& handler,
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89 const std::string& path)
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90 {
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91 {
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92 // Check whether the cache already contains the resource
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93 boost::shared_lock<boost::shared_mutex> lock(mutex_);
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94
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95 Content::const_iterator found = content_.find(path);
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96
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97 if (found != content_.end())
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98 {
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99 assert(found->second != NULL);
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100 handler.Apply(*found->second);
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101 return;
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102 }
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103 }
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104
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105 // This resource has not been cached yet
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106
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107 std::unique_ptr<std::string> item(new std::string);
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108 ReadStaticAsset(*item, path);
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109 handler.Apply(*item);
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110
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111 {
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112 // Store the resource into the cache
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113 boost::unique_lock<boost::shared_mutex> lock(mutex_);
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114
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115 if (content_.find(path) == content_.end())
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116 {
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117 content_[path] = item.release();
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118 }
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119 }
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120 }
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121
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122
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123 void ResourcesCache::Answer(OrthancPluginRestOutput* output,
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124 const std::string& path)
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125 {
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126 const std::string mime = Orthanc::EnumerationToString(Orthanc::SystemToolbox::AutodetectMimeType(path));
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127
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128 RestOutputHandler handler(output, mime);
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129 Apply(handler, path);
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130 }
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131
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132
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133 void ResourcesCache::ReadResource(std::string& target,
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134 const std::string& path)
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135 {
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136 StoreResourceIntoString handler(target);
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137 Apply(handler, path);
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138 }
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