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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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73
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32 #include <boost/thread.hpp>
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33
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72
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34
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35 // Forward declaration
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36 void ReadStaticAsset(std::string& target,
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37 const std::string& path);
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38
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39
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40 class ResourcesCache::RestOutputHandler : public IHandler
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41 {
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42 private:
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43 OrthancPluginRestOutput* output_;
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44 std::string mime_;
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45
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46 public:
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47 RestOutputHandler(OrthancPluginRestOutput* output,
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48 const std::string& mime) :
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49 output_(output),
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50 mime_(mime)
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51 {
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52 }
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53
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54 virtual void Apply(const std::string& resource) ORTHANC_OVERRIDE
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55 {
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56 OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output_,
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57 resource.c_str(), resource.size(), mime_.c_str());
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58 }
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59 };
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60
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61
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62 class ResourcesCache::StoreResourceIntoString : public IHandler
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63 {
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64 private:
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65 std::string& target_;
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66
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67 public:
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68 StoreResourceIntoString(std::string& target) :
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69 target_(target)
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70 {
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71 }
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72
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73 virtual void Apply(const std::string& resource) ORTHANC_OVERRIDE
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74 {
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75 target_ = resource;
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76 }
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77 };
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78
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79
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80 ResourcesCache::~ResourcesCache()
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81 {
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82 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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83 {
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84 assert(it->second != NULL);
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85 delete it->second;
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86 }
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87 }
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88
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89
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90 void ResourcesCache::Apply(IHandler& handler,
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91 const std::string& path)
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92 {
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93 {
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94 // Check whether the cache already contains the resource
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95 boost::shared_lock<boost::shared_mutex> lock(mutex_);
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96
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97 Content::const_iterator found = content_.find(path);
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98
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99 if (found != content_.end())
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100 {
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101 assert(found->second != NULL);
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102 handler.Apply(*found->second);
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103 return;
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104 }
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105 }
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106
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107 // This resource has not been cached yet
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108
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109 std::unique_ptr<std::string> item(new std::string);
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110 ReadStaticAsset(*item, path);
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111 handler.Apply(*item);
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112
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113 {
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114 // Store the resource into the cache
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115 boost::unique_lock<boost::shared_mutex> lock(mutex_);
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116
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117 if (content_.find(path) == content_.end())
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118 {
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119 content_[path] = item.release();
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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
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125 void ResourcesCache::Answer(OrthancPluginRestOutput* output,
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126 const std::string& path)
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127 {
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128 const std::string mime = Orthanc::EnumerationToString(Orthanc::SystemToolbox::AutodetectMimeType(path));
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129
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130 RestOutputHandler handler(output, mime);
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131 Apply(handler, path);
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132 }
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133
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134
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135 void ResourcesCache::ReadResource(std::string& target,
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136 const std::string& path)
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137 {
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138 StoreResourceIntoString handler(target);
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139 Apply(handler, path);
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140 }
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