Mercurial > hg > orthanc
annotate Plugins/Engine/PluginsManager.cpp @ 1571:3232f1c995a5
provide the origin of the requests to HTTP handlers
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 25 Aug 2015 11:04:19 +0200 |
parents | f967bdf8534e |
children | 357c4bb15701 |
rev | line source |
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887 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
887 | 5 * |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
10 * | |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
22 * | |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
33 #include "PluginsManager.h" | |
34 | |
894 | 35 #include "../../Core/Toolbox.h" |
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36 #include "../../Core/HttpServer/HttpOutput.h" |
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37 #include "../../Core/Logging.h" |
894 | 38 |
887 | 39 #include <cassert> |
40 #include <memory> | |
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41 #include <boost/filesystem.hpp> |
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42 |
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43 #ifdef WIN32 |
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44 #define PLUGIN_EXTENSION ".dll" |
1337 | 45 #elif defined(__linux) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
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46 #define PLUGIN_EXTENSION ".so" |
1026 | 47 #elif defined(__APPLE__) && defined(__MACH__) |
48 #define PLUGIN_EXTENSION ".dylib" | |
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49 #else |
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50 #error Support your platform here |
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51 #endif |
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52 |
887 | 53 |
54 namespace Orthanc | |
55 { | |
56 static void CallInitialize(SharedLibrary& plugin, | |
57 const OrthancPluginContext& context) | |
58 { | |
59 typedef int32_t (*Initialize) (const OrthancPluginContext*); | |
60 | |
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61 #if defined(_WIN32) |
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62 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize"); |
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63 #else |
887 | 64 /** |
65 * gcc would complain about "ISO C++ forbids casting between | |
66 * pointer-to-function and pointer-to-object" without the trick | |
67 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum | |
68 * 1) workaround". See the man page of "dlsym()". | |
69 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/ | |
70 * http://stackoverflow.com/a/14543811/881731 | |
71 **/ | |
72 | |
73 Initialize initialize; | |
74 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize"); | |
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75 #endif |
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76 |
887 | 77 assert(initialize != NULL); |
78 int32_t error = initialize(&context); | |
79 | |
80 if (error != 0) | |
81 { | |
82 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath() | |
83 << " (code " << error << ")"; | |
84 throw OrthancException(ErrorCode_SharedLibrary); | |
85 } | |
86 } | |
87 | |
88 | |
89 static void CallFinalize(SharedLibrary& plugin) | |
90 { | |
91 typedef void (*Finalize) (); | |
92 | |
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93 #if defined(_WIN32) |
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94 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize"); |
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95 #else |
887 | 96 Finalize finalize; |
97 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize"); | |
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98 #endif |
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99 |
887 | 100 assert(finalize != NULL); |
101 finalize(); | |
102 } | |
103 | |
104 | |
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105 static const char* CallGetName(SharedLibrary& plugin) |
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106 { |
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107 typedef const char* (*GetName) (); |
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108 |
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109 #if defined(_WIN32) |
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110 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName"); |
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111 #else |
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112 GetName getName; |
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113 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName"); |
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114 #endif |
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115 |
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116 assert(getName != NULL); |
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117 return getName(); |
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118 } |
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119 |
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120 |
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121 static const char* CallGetVersion(SharedLibrary& plugin) |
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122 { |
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123 typedef const char* (*GetVersion) (); |
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124 |
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125 #if defined(_WIN32) |
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126 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion"); |
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127 #else |
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128 GetVersion getVersion; |
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129 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion"); |
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130 #endif |
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131 |
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132 assert(getVersion != NULL); |
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133 return getVersion(); |
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134 } |
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135 |
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136 |
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137 int32_t PluginsManager::InvokeService(OrthancPluginContext* context, |
907 | 138 _OrthancPluginService service, |
899 | 139 const void* params) |
887 | 140 { |
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141 switch (service) |
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142 { |
907 | 143 case _OrthancPluginService_LogError: |
899 | 144 LOG(ERROR) << reinterpret_cast<const char*>(params); |
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145 return 0; |
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146 |
907 | 147 case _OrthancPluginService_LogWarning: |
899 | 148 LOG(WARNING) << reinterpret_cast<const char*>(params); |
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149 return 0; |
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150 |
907 | 151 case _OrthancPluginService_LogInfo: |
899 | 152 LOG(INFO) << reinterpret_cast<const char*>(params); |
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153 return 0; |
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154 |
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155 default: |
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156 break; |
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157 } |
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158 |
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159 PluginsManager* that = reinterpret_cast<PluginsManager*>(context->pluginsManager); |
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160 bool error = false; |
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161 |
899 | 162 for (std::list<IPluginServiceProvider*>::iterator |
163 it = that->serviceProviders_.begin(); | |
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164 it != that->serviceProviders_.end(); ++it) |
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165 { |
899 | 166 try |
167 { | |
168 if ((*it)->InvokeService(service, params)) | |
169 { | |
170 return 0; | |
171 } | |
172 } | |
173 catch (OrthancException&) | |
174 { | |
175 // This service provider has failed, go to the next | |
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176 error = true; |
899 | 177 } |
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178 } |
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179 |
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180 if (error) |
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181 { |
1200 | 182 // LOG(ERROR) << "Exception when dealing with service " << service; |
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183 } |
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184 else |
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185 { |
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186 LOG(ERROR) << "Plugin invoking unknown service " << service; |
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187 } |
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188 |
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189 return -1; |
887 | 190 } |
191 | |
192 | |
899 | 193 PluginsManager::PluginsManager() |
887 | 194 { |
894 | 195 memset(&context_, 0, sizeof(context_)); |
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196 context_.pluginsManager = this; |
887 | 197 context_.orthancVersion = ORTHANC_VERSION; |
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198 context_.Free = ::free; |
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199 context_.InvokeService = InvokeService; |
887 | 200 } |
201 | |
202 PluginsManager::~PluginsManager() | |
203 { | |
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204 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it) |
887 | 205 { |
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206 if (it->second != NULL) |
887 | 207 { |
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208 LOG(WARNING) << "Unregistering plugin '" << it->first |
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209 << "' (version " << it->second->GetVersion() << ")"; |
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210 |
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211 CallFinalize(it->second->GetLibrary()); |
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212 delete it->second; |
887 | 213 } |
214 } | |
215 } | |
216 | |
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217 |
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218 static bool IsOrthancPlugin(SharedLibrary& library) |
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219 { |
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220 return (library.HasFunction("OrthancPluginInitialize") && |
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221 library.HasFunction("OrthancPluginFinalize") && |
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222 library.HasFunction("OrthancPluginGetName") && |
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223 library.HasFunction("OrthancPluginGetVersion")); |
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224 } |
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225 |
887 | 226 |
227 void PluginsManager::RegisterPlugin(const std::string& path) | |
228 { | |
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229 if (!boost::filesystem::exists(path)) |
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230 { |
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231 LOG(ERROR) << "Inexistent path to plugins: " << path; |
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232 return; |
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233 } |
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234 |
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235 if (boost::filesystem::is_directory(path)) |
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236 { |
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237 ScanFolderForPlugins(path, false); |
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238 return; |
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239 } |
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240 |
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241 std::auto_ptr<Plugin> plugin(new Plugin(path)); |
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243 if (!IsOrthancPlugin(plugin->GetLibrary())) |
887 | 244 { |
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245 LOG(ERROR) << "Plugin " << plugin->GetLibrary().GetPath() |
887 | 246 << " does not declare the proper entry functions"; |
247 throw OrthancException(ErrorCode_SharedLibrary); | |
248 } | |
249 | |
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250 std::string name(CallGetName(plugin->GetLibrary())); |
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251 if (plugins_.find(name) != plugins_.end()) |
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252 { |
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253 LOG(ERROR) << "Plugin '" << name << "' already registered"; |
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254 throw OrthancException(ErrorCode_SharedLibrary); |
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255 } |
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256 |
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257 plugin->SetVersion(CallGetVersion(plugin->GetLibrary())); |
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258 LOG(WARNING) << "Registering plugin '" << name |
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259 << "' (version " << plugin->GetVersion() << ")"; |
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261 CallInitialize(plugin->GetLibrary(), context_); |
887 | 262 |
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263 plugins_[name] = plugin.release(); |
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264 } |
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265 |
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266 |
889 | 267 void PluginsManager::ScanFolderForPlugins(const std::string& folder, |
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268 bool isRecursive) |
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269 { |
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270 using namespace boost::filesystem; |
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271 |
889 | 272 if (!exists(folder)) |
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273 { |
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274 return; |
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275 } |
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276 |
889 | 277 LOG(INFO) << "Scanning folder " << folder << " for plugins"; |
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278 |
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279 directory_iterator end_it; // default construction yields past-the-end |
889 | 280 for (directory_iterator it(folder); |
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281 it != end_it; |
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282 ++it) |
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283 { |
889 | 284 std::string path = it->path().string(); |
285 | |
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286 if (is_directory(it->status())) |
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287 { |
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288 if (isRecursive) |
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289 { |
889 | 290 ScanFolderForPlugins(path, true); |
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291 } |
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292 } |
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293 else |
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294 { |
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295 std::string extension = boost::filesystem::extension(it->path()); |
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296 Toolbox::ToLowerCase(extension); |
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297 |
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298 if (extension == PLUGIN_EXTENSION) |
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299 { |
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300 LOG(INFO) << "Found a shared library: " << it->path(); |
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301 |
1297 | 302 SharedLibrary plugin(path); |
303 if (IsOrthancPlugin(plugin)) | |
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304 { |
1297 | 305 RegisterPlugin(path); |
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306 } |
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307 } |
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308 } |
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309 } |
887 | 310 } |
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311 |
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312 |
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313 void PluginsManager::ListPlugins(std::list<std::string>& result) const |
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314 { |
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315 result.clear(); |
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316 |
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317 for (Plugins::const_iterator it = plugins_.begin(); |
1304 | 318 it != plugins_.end(); ++it) |
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319 { |
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320 result.push_back(it->first); |
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321 } |
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322 } |
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323 |
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324 |
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325 bool PluginsManager::HasPlugin(const std::string& name) const |
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326 { |
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327 return plugins_.find(name) != plugins_.end(); |
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328 } |
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329 |
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330 |
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331 const std::string& PluginsManager::GetPluginVersion(const std::string& name) const |
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332 { |
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333 Plugins::const_iterator it = plugins_.find(name); |
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334 if (it == plugins_.end()) |
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335 { |
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336 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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337 } |
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338 else |
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339 { |
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340 return it->second->GetVersion(); |
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341 } |
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342 } |
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343 |
887 | 344 } |