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1 /**
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2 * SPDX-FileCopyrightText: 2023 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 * OHIF plugin for Orthanc
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8 * Copyright (C) 2023 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 "../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
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26
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27 #include <Logging.h>
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28 #include <SystemToolbox.h>
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29
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30 #include <EmbeddedResources.h>
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31
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32 #include <boost/thread/shared_mutex.hpp>
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33
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34 // Forward declaration
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35 void ReadStaticAsset(std::string& target,
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36 const std::string& path);
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37
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38
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39 /**
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40 * As the OHIF static assets are gzipped by the "EmbedStaticAssets.py"
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41 * script, we use a cache to maintain the uncompressed assets in order
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42 * to avoid multiple gzip decodings.
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43 **/
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44 class ResourcesCache : public boost::noncopyable
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45 {
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46 private:
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47 typedef std::map<std::string, std::string*> Content;
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48
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49 boost::shared_mutex mutex_;
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50 Content content_;
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51
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52 public:
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53 ~ResourcesCache()
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54 {
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55 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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56 {
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57 assert(it->second != NULL);
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58 delete it->second;
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59 }
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60 }
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61
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62 void Answer(OrthancPluginContext* context,
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63 OrthancPluginRestOutput* output,
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64 const std::string& path)
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65 {
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66 const std::string mime = Orthanc::EnumerationToString(Orthanc::SystemToolbox::AutodetectMimeType(path));
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67
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68 {
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69 // Check whether the cache already contains the resource
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70 boost::shared_lock<boost::shared_mutex> lock(mutex_);
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71
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72 Content::const_iterator found = content_.find(path);
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73
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74 if (found != content_.end())
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75 {
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76 assert(found->second != NULL);
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77 OrthancPluginAnswerBuffer(context, output, found->second->c_str(), found->second->size(), mime.c_str());
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78 return;
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79 }
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80 }
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81
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82 // This resource has not been cached yet
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83
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84 std::unique_ptr<std::string> item(new std::string);
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85 ReadStaticAsset(*item, path);
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86 OrthancPluginAnswerBuffer(context, output, item->c_str(), item->size(), mime.c_str());
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87
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88 {
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89 // Store the resource into the cache
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90 boost::unique_lock<boost::shared_mutex> lock(mutex_);
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91
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92 if (content_.find(path) == content_.end())
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93 {
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94 content_[path] = item.release();
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95 }
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96 }
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97 }
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98 };
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99
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100
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101 static ResourcesCache cache_;
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102
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103 void ServeFile(OrthancPluginRestOutput* output,
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104 const char* url,
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105 const OrthancPluginHttpRequest* request)
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106 {
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107 OrthancPluginContext* context = OrthancPlugins::GetGlobalContext();
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108
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109 // The next 3 HTTP headers are required to enable SharedArrayBuffer
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110 // (https://web.dev/coop-coep/)
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111 OrthancPluginSetHttpHeader(context, output, "Cross-Origin-Embedder-Policy", "require-corp");
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112 OrthancPluginSetHttpHeader(context, output, "Cross-Origin-Opener-Policy", "same-origin");
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113 OrthancPluginSetHttpHeader(context, output, "Cross-Origin-Resource-Policy", "same-origin");
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114
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115 std::string uri = request->groups[0];
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116
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117 if (uri == "app-config.js")
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118 {
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119 std::string system, user;
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120 Orthanc::EmbeddedResources::GetFileResource(system, Orthanc::EmbeddedResources::APP_CONFIG_SYSTEM);
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121 Orthanc::EmbeddedResources::GetFileResource(user, Orthanc::EmbeddedResources::APP_CONFIG_USER);
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122
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123 std::string s = (user + "\n" + system);
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124 OrthancPluginAnswerBuffer(context, output, s.c_str(), s.size(), "application/json");
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125 }
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126 else if (uri == "viewer")
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127 {
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128 cache_.Answer(context, output, "index.html");
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129 }
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130 else
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131 {
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132 cache_.Answer(context, output, uri);
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133 }
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134 }
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135
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136
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137 OrthancPluginErrorCode OnChangeCallback(OrthancPluginChangeType changeType,
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138 OrthancPluginResourceType resourceType,
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139 const char* resourceId)
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140 {
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141 try
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142 {
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143 if (changeType == OrthancPluginChangeType_OrthancStarted)
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144 {
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145 Json::Value info;
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146 if (!OrthancPlugins::RestApiGet(info, "/plugins/dicom-web", false))
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147 {
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148 throw Orthanc::OrthancException(
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149 Orthanc::ErrorCode_InternalError,
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150 "The OHIF plugin requires the DICOMweb plugin to be installed");
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151 }
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152
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153 if (info.type() != Json::objectValue ||
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154 !info.isMember("ID") ||
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155 !info.isMember("Version") ||
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156 info["ID"].type() != Json::stringValue ||
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157 info["Version"].type() != Json::stringValue ||
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158 info["ID"].asString() != "dicom-web")
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159 {
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160 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError,
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161 "The DICOMweb plugin is not properly installed");
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162 }
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163 }
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164 }
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165 catch (Orthanc::OrthancException& e)
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166 {
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167 LOG(ERROR) << "Exception: " << e.What();
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168 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode());
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169 }
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170
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171 return OrthancPluginErrorCode_Success;
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172 }
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173
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174
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175 extern "C"
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176 {
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177 ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* context)
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178 {
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179 OrthancPlugins::SetGlobalContext(context);
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180
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181 /* Check the version of the Orthanc core */
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182 if (OrthancPluginCheckVersion(context) == 0)
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183 {
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184 char info[1024];
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185 sprintf(info, "Your version of Orthanc (%s) must be above %d.%d.%d to run this plugin",
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186 context->orthancVersion,
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187 ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
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188 ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
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189 ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER);
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190 OrthancPluginLogError(context, info);
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191 return -1;
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192 }
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193
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194 #if ORTHANC_FRAMEWORK_VERSION_IS_ABOVE(1, 7, 2)
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195 Orthanc::Logging::InitializePluginContext(context);
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196 #else
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197 Orthanc::Logging::Initialize(context);
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198 #endif
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199
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200 OrthancPluginSetDescription(context, "OHIF plugin for Orthanc.");
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201
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202 OrthancPlugins::RegisterRestCallback<ServeFile>("/ohif/(.*)", true);
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203
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204 OrthancPluginRegisterOnChangeCallback(context, OnChangeCallback);
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205
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206 // Extend the default Orthanc Explorer with custom JavaScript for OHIF
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207 std::string explorer;
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208 Orthanc::EmbeddedResources::GetFileResource(explorer, Orthanc::EmbeddedResources::ORTHANC_EXPLORER);
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209 OrthancPluginExtendOrthancExplorer(context, explorer.c_str());
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210
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211 return 0;
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212 }
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213
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214
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215 ORTHANC_PLUGINS_API void OrthancPluginFinalize()
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216 {
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217 }
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218
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219
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220 ORTHANC_PLUGINS_API const char* OrthancPluginGetName()
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221 {
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222 return "ohif";
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223 }
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224
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225
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226 ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion()
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227 {
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228 return ORTHANC_OHIF_VERSION;
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229 }
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230 }
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