Mercurial > hg > orthanc-stone
annotate Framework/Oracle/WebAssemblyOracle.cpp @ 841:266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
in WebAssemblyOracle + support for LookupTableTextureSceneLayer in OpenGL (NOT
using shaders!) (2 new files) + a few small non-functional changes
| author | Benjamin Golinvaux <bgo@osimis.io> |
|---|---|
| date | Tue, 11 Jun 2019 15:41:21 +0200 |
| parents | d71cf8504159 |
| children | 67f9c27214c5 |
| 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)); | |
| 156 | |
| 157 std::string answer; | |
| 158 if (fetch->numBytes > 0) | |
| 159 { | |
| 160 answer.assign(fetch->data, fetch->numBytes); | |
| 161 } | |
| 162 | |
| 163 /** | |
| 164 * TODO - HACK - As of emscripten-1.38.31, the fetch API does | |
| 165 * not contain a way to retrieve the HTTP headers of the | |
| 166 * answer. We make the assumption that the "Content-Type" header | |
| 167 * of the response is the same as the "Accept" header of the | |
| 168 * query. This should be fixed in future versions of emscripten. | |
| 169 * https://github.com/emscripten-core/emscripten/pull/8486 | |
| 170 **/ | |
| 171 | |
| 172 HttpHeaders headers; | |
| 173 if (!context->GetExpectedContentType().empty()) | |
| 174 { | |
| 175 headers["Content-Type"] = context->GetExpectedContentType(); | |
| 176 } | |
| 177 | |
| 178 | |
| 179 emscripten_fetch_close(fetch); | |
| 180 | |
| 181 | |
| 182 /** | |
| 183 * Secondly, use the retrieved data. | |
| 184 **/ | |
| 185 | |
| 186 try | |
| 187 { | |
| 188 if (context.get() == NULL) | |
| 189 { | |
| 190 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 191 } | |
| 192 else | |
| 193 { | |
| 194 switch (context->GetCommand().GetType()) | |
| 195 { | |
| 196 case IOracleCommand::Type_OrthancRestApi: | |
| 197 { | |
| 198 OrthancRestApiCommand::SuccessMessage message | |
| 199 (context->GetTypedCommand<OrthancRestApiCommand>(), headers, answer); | |
| 200 context->EmitMessage(message); | |
| 201 break; | |
| 202 } | |
| 203 | |
| 204 case IOracleCommand::Type_GetOrthancImage: | |
| 205 { | |
| 206 context->GetTypedCommand<GetOrthancImageCommand>().ProcessHttpAnswer | |
| 207 (context->GetEmitter(), context->GetReceiver(), answer, headers); | |
| 208 break; | |
| 209 } | |
| 210 | |
| 211 case IOracleCommand::Type_GetOrthancWebViewerJpeg: | |
| 212 { | |
| 213 context->GetTypedCommand<GetOrthancWebViewerJpegCommand>().ProcessHttpAnswer | |
| 214 (context->GetEmitter(), context->GetReceiver(), answer); | |
| 215 break; | |
| 216 } | |
| 217 | |
| 218 default: | |
| 219 LOG(ERROR) << "Command type not implemented by the WebAssembly Oracle: " | |
| 220 << context->GetCommand().GetType(); | |
| 221 } | |
| 222 } | |
| 223 } | |
| 224 catch (Orthanc::OrthancException& e) | |
| 225 { | |
| 226 LOG(ERROR) << "Error while processing a fetch answer in the oracle: " << e.What(); | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 static void FailureCallback(emscripten_fetch_t *fetch) | |
| 231 { | |
| 232 std::auto_ptr<FetchContext> context(reinterpret_cast<FetchContext*>(fetch->userData)); | |
| 233 | |
| 234 LOG(ERROR) << "Fetching " << fetch->url << " failed, HTTP failure status code: " << fetch->status; | |
| 235 | |
| 236 /** | |
| 237 * TODO - The following code leads to an infinite recursion, at | |
| 238 * least with Firefox running on incognito mode => WHY? | |
| 239 **/ | |
| 240 //emscripten_fetch_close(fetch); // Also free data on failure. | |
| 241 } | |
| 242 }; | |
| 243 | |
| 244 | |
| 245 | |
| 246 class WebAssemblyOracle::FetchCommand : public boost::noncopyable | |
| 247 { | |
| 248 private: | |
| 249 WebAssemblyOracle& oracle_; | |
| 250 const IObserver& receiver_; | |
| 251 std::auto_ptr<IOracleCommand> command_; | |
| 252 Orthanc::HttpMethod method_; | |
| 253 std::string uri_; | |
| 254 std::string body_; | |
| 255 HttpHeaders headers_; | |
| 256 unsigned int timeout_; | |
| 257 std::string expectedContentType_; | |
| 258 | |
| 259 public: | |
| 260 FetchCommand(WebAssemblyOracle& oracle, | |
| 261 const IObserver& receiver, | |
| 262 IOracleCommand* command) : | |
| 263 oracle_(oracle), | |
| 264 receiver_(receiver), | |
| 265 command_(command), | |
| 266 method_(Orthanc::HttpMethod_Get), | |
| 267 timeout_(0) | |
| 268 { | |
| 269 if (command == NULL) | |
| 270 { | |
| 271 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 272 } | |
| 273 } | |
| 274 | |
| 275 void SetMethod(Orthanc::HttpMethod method) | |
| 276 { | |
| 277 method_ = method; | |
| 278 } | |
| 279 | |
| 280 void SetUri(const std::string& uri) | |
| 281 { | |
|
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handling of GET arguments
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282 uri_ = oracle_.orthancRoot_ + uri; |
| 825 | 283 } |
| 284 | |
| 285 void SetBody(std::string& body /* will be swapped */) | |
| 286 { | |
|
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
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287 if (body != "") |
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288 { |
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289 LOG(ERROR) << "Setting non-empty body. body size = " << body.size() << " body = " << body; |
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parents:
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diff
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290 } |
| 825 | 291 body_.swap(body); |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
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parents:
831
diff
changeset
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292 LOG(ERROR) << "After setting non-empty body. body_ size = " << body_.size() << " body_ = " << body_; |
| 825 | 293 } |
| 294 | |
| 295 void SetHttpHeaders(const HttpHeaders& headers) | |
| 296 { | |
| 297 headers_ = headers; | |
| 298 } | |
| 299 | |
| 300 void SetTimeout(unsigned int timeout) | |
| 301 { | |
| 302 timeout_ = timeout; | |
| 303 } | |
| 304 | |
| 305 void Execute() | |
| 306 { | |
| 307 if (command_.get() == NULL) | |
| 308 { | |
| 309 // Cannot call Execute() twice | |
| 310 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 311 } | |
| 312 | |
| 313 emscripten_fetch_attr_t attr; | |
| 314 emscripten_fetch_attr_init(&attr); | |
| 315 | |
| 316 const char* method; | |
| 317 | |
| 318 switch (method_) | |
| 319 { | |
| 320 case Orthanc::HttpMethod_Get: | |
| 321 method = "GET"; | |
| 322 break; | |
| 323 | |
| 324 case Orthanc::HttpMethod_Post: | |
| 325 method = "POST"; | |
| 326 break; | |
| 327 | |
| 328 case Orthanc::HttpMethod_Delete: | |
| 329 method = "DELETE"; | |
| 330 break; | |
| 331 | |
| 332 case Orthanc::HttpMethod_Put: | |
| 333 method = "PUT"; | |
| 334 break; | |
| 335 | |
| 336 default: | |
| 337 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 338 } | |
| 339 | |
| 340 strcpy(attr.requestMethod, method); | |
| 341 | |
| 342 attr.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY; | |
| 343 attr.onsuccess = FetchContext::SuccessCallback; | |
| 344 attr.onerror = FetchContext::FailureCallback; | |
| 345 attr.timeoutMSecs = timeout_ * 1000; | |
| 346 | |
| 347 std::vector<const char*> headers; | |
| 348 headers.reserve(2 * headers_.size() + 1); | |
| 349 | |
| 350 std::string expectedContentType; | |
| 351 | |
| 352 for (HttpHeaders::const_iterator it = headers_.begin(); it != headers_.end(); ++it) | |
| 353 { | |
| 354 std::string key; | |
| 355 Orthanc::Toolbox::ToLowerCase(key, it->first); | |
| 356 | |
| 357 if (key == "accept") | |
| 358 { | |
| 359 expectedContentType = it->second; | |
| 360 } | |
| 361 | |
| 362 if (key != "accept-encoding") // Web browsers forbid the modification of this HTTP header | |
| 363 { | |
| 364 headers.push_back(it->first.c_str()); | |
| 365 headers.push_back(it->second.c_str()); | |
| 366 } | |
| 367 } | |
| 368 | |
| 369 headers.push_back(NULL); // Termination of the array of HTTP headers | |
| 370 | |
| 371 attr.requestHeaders = &headers[0]; | |
| 372 | |
|
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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373 char* requestData = NULL; |
| 825 | 374 if (!body_.empty()) |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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375 requestData = reinterpret_cast<char*>(malloc(body_.size())); |
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parents:
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376 |
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parents:
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diff
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377 try |
| 825 | 378 { |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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379 if (!body_.empty()) |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
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diff
changeset
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380 { |
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parents:
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diff
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381 memcpy(requestData, &(body_[0]), body_.size()); |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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382 attr.requestDataSize = body_.size(); |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
383 attr.requestData = requestData; |
|
266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
384 } |
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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385 attr.userData = new FetchContext(oracle_, receiver_, command_.release(), expectedContentType); |
| 825 | 386 |
|
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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387 // Must be the last call to prevent memory leak on error |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
388 emscripten_fetch(&attr, uri_.c_str()); |
|
266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
389 } |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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390 catch(...) |
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
391 { |
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
392 if(requestData != NULL) |
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better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
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393 free(requestData); |
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
394 throw; |
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266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
395 } |
|
266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
396 } |
| 825 | 397 }; |
| 398 | |
| 399 void WebAssemblyOracle::Execute(const IObserver& receiver, | |
| 400 OrthancRestApiCommand* command) | |
| 401 { | |
| 402 FetchCommand fetch(*this, receiver, command); | |
| 403 | |
| 404 fetch.SetMethod(command->GetMethod()); | |
| 405 fetch.SetUri(command->GetUri()); | |
| 406 fetch.SetHttpHeaders(command->GetHttpHeaders()); | |
| 407 fetch.SetTimeout(command->GetTimeout()); | |
| 408 | |
|
841
266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
409 if (command->GetMethod() == Orthanc::HttpMethod_Post || |
| 825 | 410 command->GetMethod() == Orthanc::HttpMethod_Put) |
| 411 { | |
| 412 std::string body; | |
| 413 command->SwapBody(body); | |
| 414 fetch.SetBody(body); | |
| 415 } | |
|
841
266e2b0b9abc
better error reporting in DicomStructureSetLoader + fixed POST request logic
Benjamin Golinvaux <bgo@osimis.io>
parents:
831
diff
changeset
|
416 |
| 825 | 417 fetch.Execute(); |
| 418 } | |
| 419 | |
| 420 | |
| 421 void WebAssemblyOracle::Execute(const IObserver& receiver, | |
| 422 GetOrthancImageCommand* command) | |
| 423 { | |
| 424 FetchCommand fetch(*this, receiver, command); | |
| 425 | |
| 426 fetch.SetUri(command->GetUri()); | |
| 427 fetch.SetHttpHeaders(command->GetHttpHeaders()); | |
| 428 fetch.SetTimeout(command->GetTimeout()); | |
| 429 | |
| 430 fetch.Execute(); | |
| 431 } | |
| 432 | |
| 433 | |
| 434 void WebAssemblyOracle::Execute(const IObserver& receiver, | |
| 435 GetOrthancWebViewerJpegCommand* command) | |
| 436 { | |
| 437 FetchCommand fetch(*this, receiver, command); | |
| 438 | |
| 439 fetch.SetUri(command->GetUri()); | |
| 440 fetch.SetHttpHeaders(command->GetHttpHeaders()); | |
| 441 fetch.SetTimeout(command->GetTimeout()); | |
| 442 | |
| 443 fetch.Execute(); | |
| 444 } | |
| 445 | |
| 446 | |
| 447 | |
| 448 void WebAssemblyOracle::Schedule(const IObserver& receiver, | |
| 449 IOracleCommand* command) | |
| 450 { | |
| 451 std::auto_ptr<IOracleCommand> protection(command); | |
| 452 | |
| 453 if (command == NULL) | |
| 454 { | |
| 455 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
| 456 } | |
| 457 | |
| 458 switch (command->GetType()) | |
| 459 { | |
| 460 case IOracleCommand::Type_OrthancRestApi: | |
| 461 Execute(receiver, dynamic_cast<OrthancRestApiCommand*>(protection.release())); | |
| 462 break; | |
| 463 | |
| 464 case IOracleCommand::Type_GetOrthancImage: | |
| 465 Execute(receiver, dynamic_cast<GetOrthancImageCommand*>(protection.release())); | |
| 466 break; | |
| 467 | |
| 468 case IOracleCommand::Type_GetOrthancWebViewerJpeg: | |
| 469 Execute(receiver, dynamic_cast<GetOrthancWebViewerJpegCommand*>(protection.release())); | |
| 470 break; | |
| 471 | |
| 472 case IOracleCommand::Type_Sleep: | |
| 473 { | |
| 474 unsigned int timeoutMS = dynamic_cast<SleepOracleCommand*>(command)->GetDelay(); | |
| 475 emscripten_set_timeout(TimeoutContext::Callback, timeoutMS, | |
| 476 new TimeoutContext(*this, receiver, protection.release())); | |
| 477 break; | |
| 478 } | |
| 479 | |
| 480 default: | |
| 481 LOG(ERROR) << "Command type not implemented by the WebAssembly Oracle: " << command->GetType(); | |
| 482 } | |
| 483 } | |
| 484 } |