Mercurial > hg > orthanc-stone
annotate Framework/Oracle/WebAssemblyOracle.cpp @ 959:13e078adfb94 toa2019082301
Better error log in fetch failure callback +
timeout 600sec in OrthancRestApiCommand +
guard against dead controller access in PanSceneTracker +
relaxed DicomStructureSet AddReferenceSlice method to accept extraneous adds
of the same slice (while trying to understand how it happens in the first place)
| author | Benjamin Golinvaux <bgo@osimis.io> |
|---|---|
| date | Fri, 23 Aug 2019 14:16:45 +0200 |
| parents | a7351ad54960 |
| children | 91f827272c1f |
| rev | line source |
|---|---|
| 825 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "WebAssemblyOracle.h" | |
| 23 | |
| 24 #include "SleepOracleCommand.h" | |
| 25 | |
| 26 #include <Core/OrthancException.h> | |
| 27 #include <Core/Toolbox.h> | |
| 28 | |
| 29 #include <emscripten.h> | |
| 30 #include <emscripten/html5.h> | |
| 31 #include <emscripten/fetch.h> | |
| 32 | |
| 33 | |
| 34 namespace OrthancStone | |
| 35 { | |
| 36 class WebAssemblyOracle::TimeoutContext | |
| 37 { | |
| 38 private: | |
| 39 WebAssemblyOracle& oracle_; | |
| 40 const IObserver& receiver_; | |
| 41 std::auto_ptr<SleepOracleCommand> command_; | |
| 42 | |
| 43 public: | |
| 44 TimeoutContext(WebAssemblyOracle& oracle, | |
| 45 const IObserver& receiver, | |
| 46 IOracleCommand* command) : | |
| 47 oracle_(oracle), | |
| 48 receiver_(receiver) | |
| 49 { | |
| 50 if (command == NULL) | |
| 51 { | |
| 52 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 53 } | |
| 54 else | |
| 55 { | |
| 56 command_.reset(dynamic_cast<SleepOracleCommand*>(command)); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 void EmitMessage() | |
| 61 { | |
| 62 SleepOracleCommand::TimeoutMessage message(*command_); | |
| 63 oracle_.EmitMessage(receiver_, message); | |
| 64 } | |
| 65 | |
| 66 static void Callback(void *userData) | |
| 67 { | |
| 68 std::auto_ptr<TimeoutContext> context(reinterpret_cast<TimeoutContext*>(userData)); | |
| 69 context->EmitMessage(); | |
| 70 } | |
| 71 }; | |
| 72 | |
| 73 | |
| 74 class WebAssemblyOracle::Emitter : public IMessageEmitter | |
| 75 { | |
| 76 private: | |
| 77 WebAssemblyOracle& oracle_; | |
| 78 | |
| 79 public: | |
| 80 Emitter(WebAssemblyOracle& oracle) : | |
| 81 oracle_(oracle) | |
| 82 { | |
| 83 } | |
| 84 | |
| 85 virtual void EmitMessage(const IObserver& receiver, | |
| 86 const IMessage& message) | |
| 87 { | |
| 88 oracle_.EmitMessage(receiver, message); | |
| 89 } | |
| 90 }; | |
| 91 | |
| 92 | |
| 93 class WebAssemblyOracle::FetchContext : public boost::noncopyable | |
| 94 { | |
| 95 private: | |
| 96 Emitter emitter_; | |
| 97 const IObserver& receiver_; | |
| 98 std::auto_ptr<IOracleCommand> command_; | |
| 99 std::string expectedContentType_; | |
| 100 | |
| 101 public: | |
| 102 FetchContext(WebAssemblyOracle& oracle, | |
| 103 const IObserver& receiver, | |
| 104 IOracleCommand* command, | |
| 105 const std::string& expectedContentType) : | |
| 106 emitter_(oracle), | |
| 107 receiver_(receiver), | |
| 108 command_(command), | |
| 109 expectedContentType_(expectedContentType) | |
| 110 { | |
| 111 if (command == NULL) | |
| 112 { | |
| 113 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 const std::string& GetExpectedContentType() const | |
| 118 { | |
| 119 return expectedContentType_; | |
| 120 } | |
| 121 | |
| 122 void EmitMessage(const IMessage& message) | |
| 123 { | |
| 124 emitter_.EmitMessage(receiver_, message); | |
| 125 } | |
| 126 | |
| 127 IMessageEmitter& GetEmitter() | |
| 128 { | |
| 129 return emitter_; | |
| 130 } | |
| 131 | |
| 132 const IObserver& GetReceiver() const | |
| 133 { | |
| 134 return receiver_; | |
| 135 } | |
| 136 | |
| 137 IOracleCommand& GetCommand() const | |
| 138 { | |
| 139 return *command_; | |
| 140 } | |
| 141 | |
| 142 template <typename T> | |
| 143 const T& GetTypedCommand() const | |
| 144 { | |
| 145 return dynamic_cast<T&>(*command_); | |
| 146 } | |
| 147 | |
| 148 static void SuccessCallback(emscripten_fetch_t *fetch) | |
| 149 { | |
| 150 /** | |
| 151 * Firstly, make a local copy of the fetched information, and | |
| 152 * free data associated with the fetch. | |
| 153 **/ | |
| 154 | |
| 155 std::auto_ptr<FetchContext> context(reinterpret_cast<FetchContext*>(fetch->userData)); | |
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156 if (fetch->userData == NULL) |
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157 { |
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158 LOG(ERROR) << "WebAssemblyOracle::FetchContext::SuccessCallback fetch->userData is NULL!!!!!!!"; |
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159 } |
| 825 | 160 |
| 161 std::string answer; | |
| 162 if (fetch->numBytes > 0) | |
| 163 { | |
| 164 answer.assign(fetch->data, fetch->numBytes); | |
| 165 } | |
| 166 | |
| 167 /** | |
| 168 * TODO - HACK - As of emscripten-1.38.31, the fetch API does | |
| 169 * not contain a way to retrieve the HTTP headers of the | |
| 170 * answer. We make the assumption that the "Content-Type" header | |
| 171 * of the response is the same as the "Accept" header of the | |
| 172 * query. This should be fixed in future versions of emscripten. | |
| 173 * https://github.com/emscripten-core/emscripten/pull/8486 | |
| 174 **/ | |
| 175 | |
| 176 HttpHeaders headers; | |
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177 if (fetch->userData != NULL) |
| 825 | 178 { |
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179 if (!context->GetExpectedContentType().empty()) |
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180 { |
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181 headers["Content-Type"] = context->GetExpectedContentType(); |
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182 } |
| 825 | 183 } |
| 184 | |
| 185 emscripten_fetch_close(fetch); | |
| 186 | |
| 187 | |
| 188 /** | |
| 189 * Secondly, use the retrieved data. | |
| 190 **/ | |
| 191 | |
| 192 try | |
| 193 { | |
| 194 if (context.get() == NULL) | |
| 195 { | |
| 196 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 197 } | |
| 198 else | |
| 199 { | |
| 200 switch (context->GetCommand().GetType()) | |
| 201 { | |
| 202 case IOracleCommand::Type_OrthancRestApi: | |
| 203 { | |
| 204 OrthancRestApiCommand::SuccessMessage message | |
| 205 (context->GetTypedCommand<OrthancRestApiCommand>(), headers, answer); | |
| 206 context->EmitMessage(message); | |
| 207 break; | |
| 208 } | |
| 209 | |
| 210 case IOracleCommand::Type_GetOrthancImage: | |
| 211 { | |
| 212 context->GetTypedCommand<GetOrthancImageCommand>().ProcessHttpAnswer | |
| 213 (context->GetEmitter(), context->GetReceiver(), answer, headers); | |
| 214 break; | |
| 215 } | |
| 216 | |
| 217 case IOracleCommand::Type_GetOrthancWebViewerJpeg: | |
| 218 { | |
| 219 context->GetTypedCommand<GetOrthancWebViewerJpegCommand>().ProcessHttpAnswer | |
| 220 (context->GetEmitter(), context->GetReceiver(), answer); | |
| 221 break; | |
| 222 } | |
| 223 | |
| 224 default: | |
| 225 LOG(ERROR) << "Command type not implemented by the WebAssembly Oracle: " | |
| 226 << context->GetCommand().GetType(); | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 catch (Orthanc::OrthancException& e) | |
| 231 { | |
| 232 LOG(ERROR) << "Error while processing a fetch answer in the oracle: " << e.What(); | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 static void FailureCallback(emscripten_fetch_t *fetch) | |
| 237 { | |
| 238 std::auto_ptr<FetchContext> context(reinterpret_cast<FetchContext*>(fetch->userData)); | |
| 239 | |
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240 const size_t kEmscriptenStatusTextSize = sizeof(emscripten_fetch_t::statusText); |
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241 char message[kEmscriptenStatusTextSize + 1]; |
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242 memcpy(message, fetch->statusText, kEmscriptenStatusTextSize); |
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243 message[kEmscriptenStatusTextSize] = 0; |
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244 |
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245 LOG(ERROR) << "Fetching " << fetch->url |
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246 << " failed, HTTP failure status code: " << fetch->status |
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247 << " | statusText = " << message |
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248 << " | numBytes = " << fetch->numBytes |
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249 << " | totalBytes = " << fetch->totalBytes |
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250 << " | readyState = " << fetch->readyState; |
| 825 | 251 |
| 252 /** | |
| 253 * TODO - The following code leads to an infinite recursion, at | |
| 254 * least with Firefox running on incognito mode => WHY? | |
| 255 **/ | |
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256 emscripten_fetch_close(fetch); // Also free data on failure. |
| 825 | 257 } |
| 258 }; | |
| 259 | |
| 260 | |
| 261 | |
| 262 class WebAssemblyOracle::FetchCommand : public boost::noncopyable | |
| 263 { | |
| 264 private: | |
| 265 WebAssemblyOracle& oracle_; | |
| 266 const IObserver& receiver_; | |
| 267 std::auto_ptr<IOracleCommand> command_; | |
| 268 Orthanc::HttpMethod method_; | |
| 269 std::string uri_; | |
| 270 std::string body_; | |
| 271 HttpHeaders headers_; | |
| 272 unsigned int timeout_; | |
| 273 std::string expectedContentType_; | |
| 274 | |
| 275 public: | |
| 276 FetchCommand(WebAssemblyOracle& oracle, | |
| 277 const IObserver& receiver, | |
| 278 IOracleCommand* command) : | |
| 279 oracle_(oracle), | |
| 280 receiver_(receiver), | |
| 281 command_(command), | |
| 282 method_(Orthanc::HttpMethod_Get), | |
| 283 timeout_(0) | |
| 284 { | |
| 285 if (command == NULL) | |
| 286 { | |
| 287 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 288 } | |
| 289 } | |
| 290 | |
| 291 void SetMethod(Orthanc::HttpMethod method) | |
| 292 { | |
| 293 method_ = method; | |
| 294 } | |
| 295 | |
| 296 void SetUri(const std::string& uri) | |
| 297 { | |
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298 uri_ = oracle_.orthancRoot_ + uri; |
| 825 | 299 } |
| 300 | |
| 301 void SetBody(std::string& body /* will be swapped */) | |
| 302 { | |
| 303 body_.swap(body); | |
| 304 } | |
| 305 | |
| 306 void SetHttpHeaders(const HttpHeaders& headers) | |
| 307 { | |
| 308 headers_ = headers; | |
| 309 } | |
| 310 | |
| 311 void SetTimeout(unsigned int timeout) | |
| 312 { | |
| 313 timeout_ = timeout; | |
| 314 } | |
| 315 | |
| 316 void Execute() | |
| 317 { | |
| 318 if (command_.get() == NULL) | |
| 319 { | |
| 320 // Cannot call Execute() twice | |
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321 LOG(ERROR) << "WebAssemblyOracle::Execute(): (command_.get() == NULL)"; |
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322 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
| 825 | 323 } |
| 324 | |
| 325 emscripten_fetch_attr_t attr; | |
| 326 emscripten_fetch_attr_init(&attr); | |
| 327 | |
| 328 const char* method; | |
| 329 | |
| 330 switch (method_) | |
| 331 { | |
| 332 case Orthanc::HttpMethod_Get: | |
| 333 method = "GET"; | |
| 334 break; | |
| 335 | |
| 336 case Orthanc::HttpMethod_Post: | |
| 337 method = "POST"; | |
| 338 break; | |
| 339 | |
| 340 case Orthanc::HttpMethod_Delete: | |
| 341 method = "DELETE"; | |
| 342 break; | |
| 343 | |
| 344 case Orthanc::HttpMethod_Put: | |
| 345 method = "PUT"; | |
| 346 break; | |
| 347 | |
| 348 default: | |
| 349 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 350 } | |
| 351 | |
| 352 strcpy(attr.requestMethod, method); | |
| 353 | |
| 354 attr.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY; | |
| 355 attr.onsuccess = FetchContext::SuccessCallback; | |
| 356 attr.onerror = FetchContext::FailureCallback; | |
| 357 attr.timeoutMSecs = timeout_ * 1000; | |
| 358 | |
| 359 std::vector<const char*> headers; | |
| 360 headers.reserve(2 * headers_.size() + 1); | |
| 361 | |
| 362 std::string expectedContentType; | |
| 363 | |
| 364 for (HttpHeaders::const_iterator it = headers_.begin(); it != headers_.end(); ++it) | |
| 365 { | |
| 366 std::string key; | |
| 367 Orthanc::Toolbox::ToLowerCase(key, it->first); | |
| 368 | |
| 369 if (key == "accept") | |
| 370 { | |
| 371 expectedContentType = it->second; | |
| 372 } | |
| 373 | |
| 374 if (key != "accept-encoding") // Web browsers forbid the modification of this HTTP header | |
| 375 { | |
| 376 headers.push_back(it->first.c_str()); | |
| 377 headers.push_back(it->second.c_str()); | |
| 378 } | |
| 379 } | |
| 380 | |
| 381 headers.push_back(NULL); // Termination of the array of HTTP headers | |
| 382 | |
| 383 attr.requestHeaders = &headers[0]; | |
| 384 | |
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385 char* requestData = NULL; |
| 825 | 386 if (!body_.empty()) |
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387 requestData = reinterpret_cast<char*>(malloc(body_.size())); |
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388 |
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389 try |
| 825 | 390 { |
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391 if (!body_.empty()) |
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392 { |
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393 memcpy(requestData, &(body_[0]), body_.size()); |
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394 attr.requestDataSize = body_.size(); |
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395 attr.requestData = requestData; |
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396 } |
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397 attr.userData = new FetchContext(oracle_, receiver_, command_.release(), expectedContentType); |
| 825 | 398 |
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399 // Must be the last call to prevent memory leak on error |
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400 emscripten_fetch(&attr, uri_.c_str()); |
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401 } |
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402 catch(...) |
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403 { |
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404 if(requestData != NULL) |
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405 free(requestData); |
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406 throw; |
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407 } |
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408 } |
| 825 | 409 }; |
| 410 | |
| 411 void WebAssemblyOracle::Execute(const IObserver& receiver, | |
| 412 OrthancRestApiCommand* command) | |
| 413 { | |
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414 try |
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415 { |
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416 //LOG(TRACE) << "*********** WebAssemblyOracle::Execute."; |
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417 //LOG(TRACE) << "WebAssemblyOracle::Execute | command = " << command; |
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418 FetchCommand fetch(*this, receiver, command); |
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419 |
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420 fetch.SetMethod(command->GetMethod()); |
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421 fetch.SetUri(command->GetUri()); |
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422 fetch.SetHttpHeaders(command->GetHttpHeaders()); |
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423 fetch.SetTimeout(command->GetTimeout()); |
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424 |
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425 if (command->GetMethod() == Orthanc::HttpMethod_Post || |
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426 command->GetMethod() == Orthanc::HttpMethod_Put) |
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427 { |
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428 std::string body; |
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429 command->SwapBody(body); |
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430 fetch.SetBody(body); |
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431 } |
| 825 | 432 |
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433 fetch.Execute(); |
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434 //LOG(TRACE) << "*********** successful end of WebAssemblyOracle::Execute."; |
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435 } |
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436 catch (const Orthanc::OrthancException& e) |
| 825 | 437 { |
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438 if (e.HasDetails()) |
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439 { |
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440 LOG(ERROR) << "OrthancException in WebAssemblyOracle::Execute: " << e.What() << " Details: " << e.GetDetails(); |
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441 } |
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442 else |
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443 { |
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444 LOG(ERROR) << "OrthancException in WebAssemblyOracle::Execute: " << e.What(); |
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445 } |
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446 //LOG(TRACE) << "*********** failing end of WebAssemblyOracle::Execute."; |
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447 throw; |
| 825 | 448 } |
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449 catch (const std::exception& e) |
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450 { |
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451 LOG(ERROR) << "std::exception in WebAssemblyOracle::Execute: " << e.what(); |
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452 // LOG(TRACE) << "*********** failing end of WebAssemblyOracle::Execute."; |
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453 throw; |
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454 } |
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455 catch (...) |
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456 { |
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457 LOG(ERROR) << "Unknown exception in WebAssemblyOracle::Execute"; |
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458 // LOG(TRACE) << "*********** failing end of WebAssemblyOracle::Execute."; |
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459 throw; |
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460 } |
| 825 | 461 } |
| 462 | |
| 463 | |
| 464 void WebAssemblyOracle::Execute(const IObserver& receiver, | |
| 465 GetOrthancImageCommand* command) | |
| 466 { | |
| 467 FetchCommand fetch(*this, receiver, command); | |
| 468 | |
| 469 fetch.SetUri(command->GetUri()); | |
| 470 fetch.SetHttpHeaders(command->GetHttpHeaders()); | |
| 471 fetch.SetTimeout(command->GetTimeout()); | |
| 472 | |
| 473 fetch.Execute(); | |
| 474 } | |
| 475 | |
| 476 | |
| 477 void WebAssemblyOracle::Execute(const IObserver& receiver, | |
| 478 GetOrthancWebViewerJpegCommand* command) | |
| 479 { | |
| 480 FetchCommand fetch(*this, receiver, command); | |
| 481 | |
| 482 fetch.SetUri(command->GetUri()); | |
| 483 fetch.SetHttpHeaders(command->GetHttpHeaders()); | |
| 484 fetch.SetTimeout(command->GetTimeout()); | |
| 485 | |
| 486 fetch.Execute(); | |
| 487 } | |
| 488 | |
| 489 | |
| 490 | |
| 491 void WebAssemblyOracle::Schedule(const IObserver& receiver, | |
| 492 IOracleCommand* command) | |
| 493 { | |
| 494 std::auto_ptr<IOracleCommand> protection(command); | |
| 495 | |
| 496 if (command == NULL) | |
| 497 { | |
| 498 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 499 } | |
| 500 | |
| 501 switch (command->GetType()) | |
| 502 { | |
| 503 case IOracleCommand::Type_OrthancRestApi: | |
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504 //// DIAGNOSTIC. PLEASE REMOVE IF IT HAS BEEN COMMITTED BY MISTAKE |
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505 //{ |
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506 // const IObserver* pReceiver = &receiver; |
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507 // LOG(TRACE) << "WebAssemblyOracle::Schedule | pReceiver is " << pReceiver; |
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508 // LOG(TRACE) << "WebAssemblyOracle::Schedule | command = " << command; |
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509 // OrthancRestApiCommand* rac = dynamic_cast<OrthancRestApiCommand*>(protection.get()); |
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510 // LOG(TRACE) << "WebAssemblyOracle::Schedule | typed command = " << rac; |
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511 // LOG(TRACE) << "WebAssemblyOracle::Schedule" << rac->GetUri(); |
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512 //} |
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513 //// END OF BLOCK TO REMOVE |
| 825 | 514 Execute(receiver, dynamic_cast<OrthancRestApiCommand*>(protection.release())); |
| 515 break; | |
| 516 | |
| 517 case IOracleCommand::Type_GetOrthancImage: | |
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518 //// DIAGNOSTIC. PLEASE REMOVE IF IT HAS BEEN COMMITTED BY MISTAKE |
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519 //{ |
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520 // GetOrthancImageCommand* rac = dynamic_cast<GetOrthancImageCommand*>(protection.get()); |
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521 // LOG(TRACE) << "WebAssemblyOracle::Schedule" << rac->GetUri(); |
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522 //} |
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523 //// END OF BLOCK TO REMOVE |
| 825 | 524 Execute(receiver, dynamic_cast<GetOrthancImageCommand*>(protection.release())); |
| 525 break; | |
| 526 | |
| 527 case IOracleCommand::Type_GetOrthancWebViewerJpeg: | |
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528 //// DIAGNOSTIC. PLEASE REMOVE IF IT HAS BEEN COMMITTED BY MISTAKE |
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529 //{ |
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530 // GetOrthancWebViewerJpegCommand* rac = dynamic_cast<GetOrthancWebViewerJpegCommand*>(protection.get()); |
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531 // LOG(TRACE) << "WebAssemblyOracle::Schedule" << rac->GetUri(); |
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532 //} |
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533 //// END OF BLOCK TO REMOVE |
| 825 | 534 Execute(receiver, dynamic_cast<GetOrthancWebViewerJpegCommand*>(protection.release())); |
| 535 break; | |
| 536 | |
| 537 case IOracleCommand::Type_Sleep: | |
| 538 { | |
| 539 unsigned int timeoutMS = dynamic_cast<SleepOracleCommand*>(command)->GetDelay(); | |
| 540 emscripten_set_timeout(TimeoutContext::Callback, timeoutMS, | |
| 541 new TimeoutContext(*this, receiver, protection.release())); | |
| 542 break; | |
| 543 } | |
| 544 | |
| 545 default: | |
| 546 LOG(ERROR) << "Command type not implemented by the WebAssembly Oracle: " << command->GetType(); | |
| 547 } | |
| 548 } | |
| 549 } |