Mercurial > hg > orthanc
annotate OrthancFramework/Sources/RestApi/RestApiHierarchy.cpp @ 4300:b30a8de92ad9
abi continued
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 05 Nov 2020 19:33:18 +0100 |
| parents | 4d42408da117 |
| children | 44b53a2c0a13 |
| rev | line source |
|---|---|
| 969 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
| 969 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
| 969 | 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 | |
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15 * Lesser General Public License for more details. |
| 969 | 16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
| 969 | 20 **/ |
| 21 | |
| 22 | |
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23 #include "../PrecompiledHeaders.h" |
| 969 | 24 #include "RestApiHierarchy.h" |
| 25 | |
| 975 | 26 #include "../OrthancException.h" |
| 27 | |
| 969 | 28 #include <cassert> |
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29 #include <stdio.h> |
| 969 | 30 |
| 31 namespace Orthanc | |
| 32 { | |
| 978 | 33 RestApiHierarchy::Resource::Resource() : |
| 972 | 34 getHandler_(NULL), |
| 35 postHandler_(NULL), | |
| 36 putHandler_(NULL), | |
| 37 deleteHandler_(NULL) | |
| 38 { | |
| 39 } | |
| 40 | |
| 41 | |
| 978 | 42 bool RestApiHierarchy::Resource::HasHandler(HttpMethod method) const |
| 972 | 43 { |
| 44 switch (method) | |
| 45 { | |
| 46 case HttpMethod_Get: | |
| 47 return getHandler_ != NULL; | |
| 48 | |
| 49 case HttpMethod_Post: | |
| 50 return postHandler_ != NULL; | |
| 51 | |
| 52 case HttpMethod_Put: | |
| 53 return putHandler_ != NULL; | |
| 54 | |
| 55 case HttpMethod_Delete: | |
| 56 return deleteHandler_ != NULL; | |
| 57 | |
| 58 default: | |
| 59 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 | |
| 4300 | 64 void RestApiHierarchy::Resource::Register(RestApiGetCall::Handler handler) |
| 65 { | |
| 66 getHandler_ = handler; | |
| 67 } | |
| 68 | |
| 69 void RestApiHierarchy::Resource::Register(RestApiPutCall::Handler handler) | |
| 70 { | |
| 71 putHandler_ = handler; | |
| 72 } | |
| 73 | |
| 74 void RestApiHierarchy::Resource::Register(RestApiPostCall::Handler handler) | |
| 75 { | |
| 76 postHandler_ = handler; | |
| 77 } | |
| 78 | |
| 79 void RestApiHierarchy::Resource::Register(RestApiDeleteCall::Handler handler) | |
| 80 { | |
| 81 deleteHandler_ = handler; | |
| 82 } | |
| 83 | |
| 84 | |
| 978 | 85 bool RestApiHierarchy::Resource::IsEmpty() const |
| 969 | 86 { |
| 972 | 87 return (getHandler_ == NULL && |
| 88 postHandler_ == NULL && | |
| 89 putHandler_ == NULL && | |
| 90 deleteHandler_ == NULL); | |
| 91 } | |
| 92 | |
| 93 | |
| 969 | 94 RestApiHierarchy& RestApiHierarchy::AddChild(Children& children, |
| 95 const std::string& name) | |
| 96 { | |
| 97 Children::iterator it = children.find(name); | |
| 98 | |
| 99 if (it == children.end()) | |
| 100 { | |
| 101 // Create new child | |
| 102 RestApiHierarchy *child = new RestApiHierarchy; | |
| 103 children[name] = child; | |
| 104 return *child; | |
| 105 } | |
| 106 else | |
| 107 { | |
| 108 return *it->second; | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 | |
| 978 | 113 |
| 114 bool RestApiHierarchy::Resource::Handle(RestApiGetCall& call) const | |
| 115 { | |
| 116 if (getHandler_ != NULL) | |
| 117 { | |
| 118 getHandler_(call); | |
| 119 return true; | |
| 120 } | |
| 121 else | |
| 122 { | |
| 123 return false; | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 | |
| 128 bool RestApiHierarchy::Resource::Handle(RestApiPutCall& call) const | |
| 129 { | |
| 130 if (putHandler_ != NULL) | |
| 131 { | |
| 132 putHandler_(call); | |
| 133 return true; | |
| 134 } | |
| 135 else | |
| 136 { | |
| 137 return false; | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 | |
| 142 bool RestApiHierarchy::Resource::Handle(RestApiPostCall& call) const | |
| 143 { | |
| 144 if (postHandler_ != NULL) | |
| 145 { | |
| 146 postHandler_(call); | |
| 147 return true; | |
| 148 } | |
| 149 else | |
| 150 { | |
| 151 return false; | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 | |
| 156 bool RestApiHierarchy::Resource::Handle(RestApiDeleteCall& call) const | |
| 157 { | |
| 158 if (deleteHandler_ != NULL) | |
| 159 { | |
| 160 deleteHandler_(call); | |
| 161 return true; | |
| 162 } | |
| 163 else | |
| 164 { | |
| 165 return false; | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 | |
| 4300 | 170 RestApiHierarchy::IVisitor::~IVisitor() |
| 171 { | |
| 172 } | |
| 173 | |
| 978 | 174 |
| 969 | 175 void RestApiHierarchy::DeleteChildren(Children& children) |
| 176 { | |
| 177 for (Children::iterator it = children.begin(); | |
| 1303 | 178 it != children.end(); ++it) |
| 969 | 179 { |
| 180 delete it->second; | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 | |
| 185 template <typename Handler> | |
| 186 void RestApiHierarchy::RegisterInternal(const RestApiPath& path, | |
| 187 Handler handler, | |
| 188 size_t level) | |
| 189 { | |
| 190 if (path.GetLevelCount() == level) | |
| 191 { | |
| 192 if (path.IsUniversalTrailing()) | |
| 193 { | |
| 194 universalHandlers_.Register(handler); | |
| 195 } | |
| 196 else | |
| 197 { | |
| 198 handlers_.Register(handler); | |
| 199 } | |
| 200 } | |
| 201 else | |
| 202 { | |
| 203 RestApiHierarchy* child; | |
| 204 if (path.IsWildcardLevel(level)) | |
| 205 { | |
| 206 child = &AddChild(wildcardChildren_, path.GetWildcardName(level)); | |
| 207 } | |
| 208 else | |
| 209 { | |
| 210 child = &AddChild(children_, path.GetLevelName(level)); | |
| 211 } | |
| 212 | |
| 213 child->RegisterInternal(path, handler, level + 1); | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 | |
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218 bool RestApiHierarchy::LookupResource(IHttpHandler::Arguments& components, |
| 969 | 219 const UriComponents& uri, |
| 978 | 220 IVisitor& visitor, |
| 221 size_t level) | |
| 969 | 222 { |
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223 if (uri.size() != 0 && |
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224 level > uri.size()) |
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225 { |
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226 return false; |
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227 } |
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228 |
| 969 | 229 UriComponents trailing; |
| 230 | |
| 231 // Look for an exact match on the resource of interest | |
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232 if (uri.size() == 0 || |
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233 level == uri.size()) |
| 969 | 234 { |
| 235 if (!handlers_.IsEmpty() && | |
| 978 | 236 visitor.Visit(handlers_, uri, components, trailing)) |
| 969 | 237 { |
| 238 return true; | |
| 239 } | |
| 240 } | |
| 241 | |
| 242 | |
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243 if (level < uri.size()) // A recursive call is possible |
| 969 | 244 { |
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245 // Try and go down in the hierarchy, using an exact match for the child |
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246 Children::const_iterator child = children_.find(uri[level]); |
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247 if (child != children_.end()) |
| 969 | 248 { |
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249 if (child->second->LookupResource(components, uri, visitor, level + 1)) |
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250 { |
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251 return true; |
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252 } |
| 969 | 253 } |
| 254 | |
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255 // Try and go down in the hierarchy, using wildcard rules for children |
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256 for (child = wildcardChildren_.begin(); |
| 1303 | 257 child != wildcardChildren_.end(); ++child) |
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258 { |
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259 IHttpHandler::Arguments subComponents = components; |
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260 subComponents[child->first] = uri[level]; |
| 969 | 261 |
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262 if (child->second->LookupResource(subComponents, uri, visitor, level + 1)) |
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263 { |
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264 return true; |
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265 } |
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266 } |
| 969 | 267 } |
| 268 | |
| 269 | |
| 270 // As a last resort, call the universal handlers, if any | |
| 271 if (!universalHandlers_.IsEmpty()) | |
| 272 { | |
| 273 trailing.resize(uri.size() - level); | |
| 274 size_t pos = 0; | |
| 275 for (size_t i = level; i < uri.size(); i++, pos++) | |
| 276 { | |
| 277 trailing[pos] = uri[i]; | |
| 278 } | |
| 279 | |
| 280 assert(pos == trailing.size()); | |
| 281 | |
| 978 | 282 if (visitor.Visit(universalHandlers_, uri, components, trailing)) |
| 969 | 283 { |
| 284 return true; | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 return false; | |
| 289 } | |
| 290 | |
| 291 | |
| 978 | 292 bool RestApiHierarchy::CanGenerateDirectory() const |
| 293 { | |
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294 return (universalHandlers_.IsEmpty() && |
| 1303 | 295 wildcardChildren_.empty()); |
| 978 | 296 } |
| 297 | |
| 298 | |
| 969 | 299 bool RestApiHierarchy::GetDirectory(Json::Value& result, |
| 300 const UriComponents& uri, | |
| 301 size_t level) | |
| 302 { | |
| 303 if (uri.size() == level) | |
| 304 { | |
| 978 | 305 if (CanGenerateDirectory()) |
| 969 | 306 { |
| 307 result = Json::arrayValue; | |
| 308 | |
| 309 for (Children::const_iterator it = children_.begin(); | |
| 1303 | 310 it != children_.end(); ++it) |
| 969 | 311 { |
| 312 result.append(it->first); | |
| 313 } | |
| 314 | |
| 315 return true; | |
| 316 } | |
| 317 else | |
| 318 { | |
| 319 return false; | |
| 320 } | |
| 321 } | |
| 322 | |
| 323 Children::const_iterator child = children_.find(uri[level]); | |
| 324 if (child != children_.end()) | |
| 325 { | |
| 326 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 327 { | |
| 328 return true; | |
| 329 } | |
| 330 } | |
| 331 | |
| 332 for (child = wildcardChildren_.begin(); | |
| 1303 | 333 child != wildcardChildren_.end(); ++child) |
| 969 | 334 { |
| 335 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 336 { | |
| 337 return true; | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 return false; | |
| 342 } | |
| 343 | |
| 344 | |
| 345 RestApiHierarchy::~RestApiHierarchy() | |
| 346 { | |
| 347 DeleteChildren(children_); | |
| 348 DeleteChildren(wildcardChildren_); | |
| 349 } | |
| 350 | |
| 970 | 351 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 352 RestApiGetCall::Handler handler) |
| 969 | 353 { |
| 970 | 354 RestApiPath path(uri); |
| 969 | 355 RegisterInternal(path, handler, 0); |
| 356 } | |
| 357 | |
| 970 | 358 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 359 RestApiPutCall::Handler handler) |
| 969 | 360 { |
| 970 | 361 RestApiPath path(uri); |
| 969 | 362 RegisterInternal(path, handler, 0); |
| 363 } | |
| 364 | |
| 970 | 365 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 366 RestApiPostCall::Handler handler) |
| 969 | 367 { |
| 970 | 368 RestApiPath path(uri); |
| 969 | 369 RegisterInternal(path, handler, 0); |
| 370 } | |
| 371 | |
| 970 | 372 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 373 RestApiDeleteCall::Handler handler) |
| 969 | 374 { |
| 970 | 375 RestApiPath path(uri); |
| 969 | 376 RegisterInternal(path, handler, 0); |
| 377 } | |
| 378 | |
| 379 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const | |
| 380 { | |
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381 target = Json::objectValue; |
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382 |
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383 /*std::string s = " "; |
| 972 | 384 if (handlers_.HasHandler(HttpMethod_Get)) |
| 969 | 385 { |
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386 s += "GET "; |
| 969 | 387 } |
| 388 | |
| 972 | 389 if (handlers_.HasHandler(HttpMethod_Post)) |
| 969 | 390 { |
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391 s += "POST "; |
| 969 | 392 } |
| 393 | |
| 972 | 394 if (handlers_.HasHandler(HttpMethod_Put)) |
| 969 | 395 { |
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396 s += "PUT "; |
| 969 | 397 } |
| 398 | |
| 972 | 399 if (handlers_.HasHandler(HttpMethod_Delete)) |
| 969 | 400 { |
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401 s += "DELETE "; |
| 969 | 402 } |
| 403 | |
| 978 | 404 target = s;*/ |
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405 |
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406 for (Children::const_iterator it = children_.begin(); |
| 1303 | 407 it != children_.end(); ++it) |
| 969 | 408 { |
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409 it->second->CreateSiteMap(target[it->first]); |
| 969 | 410 } |
| 411 | |
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412 for (Children::const_iterator it = wildcardChildren_.begin(); |
| 1303 | 413 it != wildcardChildren_.end(); ++it) |
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414 { |
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415 it->second->CreateSiteMap(target["<" + it->first + ">"]); |
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416 } |
| 969 | 417 } |
| 418 | |
| 4300 | 419 bool RestApiHierarchy::GetDirectory(Json::Value &result, const UriComponents &uri) |
| 420 { | |
| 421 return GetDirectory(result, uri, 0); | |
| 422 } | |
| 423 | |
| 978 | 424 |
| 425 bool RestApiHierarchy::LookupResource(const UriComponents& uri, | |
| 426 IVisitor& visitor) | |
| 969 | 427 { |
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428 IHttpHandler::Arguments components; |
| 978 | 429 return LookupResource(components, uri, visitor, 0); |
| 969 | 430 } |
| 431 | |
| 978 | 432 |
| 433 | |
| 434 namespace | |
| 435 { | |
| 436 // Anonymous namespace to avoid clashes between compilation modules | |
| 437 | |
| 438 class AcceptedMethodsVisitor : public RestApiHierarchy::IVisitor | |
| 439 { | |
| 440 private: | |
| 441 std::set<HttpMethod>& methods_; | |
| 442 | |
| 443 public: | |
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444 explicit AcceptedMethodsVisitor(std::set<HttpMethod>& methods) : |
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445 methods_(methods) |
| 978 | 446 { |
| 447 } | |
| 448 | |
| 449 virtual bool Visit(const RestApiHierarchy::Resource& resource, | |
| 450 const UriComponents& uri, | |
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451 const IHttpHandler::Arguments& components, |
| 978 | 452 const UriComponents& trailing) |
| 453 { | |
| 454 if (trailing.size() == 0) // Ignore universal handlers | |
| 455 { | |
| 456 if (resource.HasHandler(HttpMethod_Get)) | |
| 457 { | |
| 458 methods_.insert(HttpMethod_Get); | |
| 459 } | |
| 460 | |
| 461 if (resource.HasHandler(HttpMethod_Post)) | |
| 462 { | |
| 463 methods_.insert(HttpMethod_Post); | |
| 464 } | |
| 465 | |
| 466 if (resource.HasHandler(HttpMethod_Put)) | |
| 467 { | |
| 468 methods_.insert(HttpMethod_Put); | |
| 469 } | |
| 470 | |
| 471 if (resource.HasHandler(HttpMethod_Delete)) | |
| 472 { | |
| 473 methods_.insert(HttpMethod_Delete); | |
| 474 } | |
| 475 } | |
| 476 | |
| 477 return false; // Continue to check all the possible ways to access this URI | |
| 478 } | |
| 479 }; | |
| 480 } | |
| 481 | |
| 482 void RestApiHierarchy::GetAcceptedMethods(std::set<HttpMethod>& methods, | |
| 483 const UriComponents& uri) | |
| 969 | 484 { |
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485 IHttpHandler::Arguments components; |
| 978 | 486 AcceptedMethodsVisitor visitor(methods); |
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487 if (LookupResource(components, uri, visitor, 0)) |
| 978 | 488 { |
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489 Json::Value d; |
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490 if (GetDirectory(d, uri)) |
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491 { |
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492 methods.insert(HttpMethod_Get); |
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493 } |
| 978 | 494 } |
| 495 } | |
| 4300 | 496 |
| 969 | 497 } |