Mercurial > hg > orthanc
annotate OrthancFramework/Sources/RestApi/RestApiHierarchy.cpp @ 4672:d9942d48fea7
ZipWriter::CancelStream(), ZipWriter::GetArchiveSize() and HttpOutput::AnswerWithoutBuffering()
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 02 Jun 2021 17:35:39 +0200 |
| parents | d9473bd5ed43 |
| children | 7053502fbf97 |
| 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) 2017-2021 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 | |
| 4400 | 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 | |
| 969 | 170 void RestApiHierarchy::DeleteChildren(Children& children) |
| 171 { | |
| 172 for (Children::iterator it = children.begin(); | |
| 1303 | 173 it != children.end(); ++it) |
| 969 | 174 { |
| 175 delete it->second; | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 | |
| 180 template <typename Handler> | |
| 181 void RestApiHierarchy::RegisterInternal(const RestApiPath& path, | |
| 182 Handler handler, | |
| 183 size_t level) | |
| 184 { | |
| 185 if (path.GetLevelCount() == level) | |
| 186 { | |
| 187 if (path.IsUniversalTrailing()) | |
| 188 { | |
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189 handlersWithTrailing_.Register(handler); |
| 969 | 190 } |
| 191 else | |
| 192 { | |
| 193 handlers_.Register(handler); | |
| 194 } | |
| 195 } | |
| 196 else | |
| 197 { | |
| 198 RestApiHierarchy* child; | |
| 199 if (path.IsWildcardLevel(level)) | |
| 200 { | |
| 201 child = &AddChild(wildcardChildren_, path.GetWildcardName(level)); | |
| 202 } | |
| 203 else | |
| 204 { | |
| 205 child = &AddChild(children_, path.GetLevelName(level)); | |
| 206 } | |
| 207 | |
| 208 child->RegisterInternal(path, handler, level + 1); | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 | |
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213 bool RestApiHierarchy::LookupResource(HttpToolbox::Arguments& components, |
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214 const UriComponents& uri, |
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215 IVisitor& visitor, |
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216 size_t level) |
| 969 | 217 { |
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218 if (uri.size() != 0 && |
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219 level > uri.size()) |
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220 { |
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221 return false; |
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222 } |
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223 |
| 969 | 224 // Look for an exact match on the resource of interest |
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225 if (uri.size() == 0 || |
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226 level == uri.size()) |
| 969 | 227 { |
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228 UriComponents noTrailing; |
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229 |
| 969 | 230 if (!handlers_.IsEmpty() && |
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231 visitor.Visit(handlers_, uri, false, components, noTrailing)) |
| 969 | 232 { |
| 233 return true; | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 | |
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238 if (level < uri.size()) // A recursive call is possible |
| 969 | 239 { |
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240 // Try and go down in the hierarchy, using an exact match for the child |
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241 Children::const_iterator child = children_.find(uri[level]); |
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242 if (child != children_.end()) |
| 969 | 243 { |
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244 if (child->second->LookupResource(components, uri, visitor, level + 1)) |
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245 { |
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246 return true; |
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247 } |
| 969 | 248 } |
| 249 | |
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250 // Try and go down in the hierarchy, using wildcard rules for children |
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251 for (child = wildcardChildren_.begin(); |
| 1303 | 252 child != wildcardChildren_.end(); ++child) |
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253 { |
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254 HttpToolbox::Arguments subComponents = components; |
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255 subComponents[child->first] = uri[level]; |
| 969 | 256 |
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257 if (child->second->LookupResource(subComponents, uri, visitor, level + 1)) |
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258 { |
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259 return true; |
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260 } |
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261 } |
| 969 | 262 } |
| 263 | |
| 264 | |
| 265 // As a last resort, call the universal handlers, if any | |
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266 if (!handlersWithTrailing_.IsEmpty()) |
| 969 | 267 { |
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268 UriComponents trailing; |
| 969 | 269 trailing.resize(uri.size() - level); |
| 270 size_t pos = 0; | |
| 271 for (size_t i = level; i < uri.size(); i++, pos++) | |
| 272 { | |
| 273 trailing[pos] = uri[i]; | |
| 274 } | |
| 275 | |
| 276 assert(pos == trailing.size()); | |
| 277 | |
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278 if (visitor.Visit(handlersWithTrailing_, uri, true, components, trailing)) |
| 969 | 279 { |
| 280 return true; | |
| 281 } | |
| 282 } | |
| 283 | |
| 284 return false; | |
| 285 } | |
| 286 | |
| 287 | |
| 978 | 288 bool RestApiHierarchy::CanGenerateDirectory() const |
| 289 { | |
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290 return (handlersWithTrailing_.IsEmpty() && |
| 1303 | 291 wildcardChildren_.empty()); |
| 978 | 292 } |
| 293 | |
| 294 | |
| 969 | 295 bool RestApiHierarchy::GetDirectory(Json::Value& result, |
| 296 const UriComponents& uri, | |
| 297 size_t level) | |
| 298 { | |
| 299 if (uri.size() == level) | |
| 300 { | |
| 978 | 301 if (CanGenerateDirectory()) |
| 969 | 302 { |
| 303 result = Json::arrayValue; | |
| 304 | |
| 305 for (Children::const_iterator it = children_.begin(); | |
| 1303 | 306 it != children_.end(); ++it) |
| 969 | 307 { |
| 308 result.append(it->first); | |
| 309 } | |
| 310 | |
| 311 return true; | |
| 312 } | |
| 313 else | |
| 314 { | |
| 315 return false; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 Children::const_iterator child = children_.find(uri[level]); | |
| 320 if (child != children_.end()) | |
| 321 { | |
| 322 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 323 { | |
| 324 return true; | |
| 325 } | |
| 326 } | |
| 327 | |
| 328 for (child = wildcardChildren_.begin(); | |
| 1303 | 329 child != wildcardChildren_.end(); ++child) |
| 969 | 330 { |
| 331 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 332 { | |
| 333 return true; | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 return false; | |
| 338 } | |
| 339 | |
| 340 | |
| 341 RestApiHierarchy::~RestApiHierarchy() | |
| 342 { | |
| 343 DeleteChildren(children_); | |
| 344 DeleteChildren(wildcardChildren_); | |
| 345 } | |
| 346 | |
| 970 | 347 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 348 RestApiGetCall::Handler handler) |
| 969 | 349 { |
| 970 | 350 RestApiPath path(uri); |
| 969 | 351 RegisterInternal(path, handler, 0); |
| 352 } | |
| 353 | |
| 970 | 354 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 355 RestApiPutCall::Handler handler) |
| 969 | 356 { |
| 970 | 357 RestApiPath path(uri); |
| 969 | 358 RegisterInternal(path, handler, 0); |
| 359 } | |
| 360 | |
| 970 | 361 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 362 RestApiPostCall::Handler handler) |
| 969 | 363 { |
| 970 | 364 RestApiPath path(uri); |
| 969 | 365 RegisterInternal(path, handler, 0); |
| 366 } | |
| 367 | |
| 970 | 368 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 369 RestApiDeleteCall::Handler handler) |
| 969 | 370 { |
| 970 | 371 RestApiPath path(uri); |
| 969 | 372 RegisterInternal(path, handler, 0); |
| 373 } | |
| 374 | |
| 375 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const | |
| 376 { | |
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377 target = Json::objectValue; |
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378 |
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379 /*std::string s = " "; |
| 4400 | 380 if (handlers_.HasHandler(HttpMethod_Get)) |
| 969 | 381 { |
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382 s += "GET "; |
| 969 | 383 } |
| 384 | |
| 4400 | 385 if (handlers_.HasHandler(HttpMethod_Post)) |
| 969 | 386 { |
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387 s += "POST "; |
| 969 | 388 } |
| 389 | |
| 4400 | 390 if (handlers_.HasHandler(HttpMethod_Put)) |
| 969 | 391 { |
|
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392 s += "PUT "; |
| 969 | 393 } |
| 394 | |
| 4400 | 395 if (handlers_.HasHandler(HttpMethod_Delete)) |
| 969 | 396 { |
|
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397 s += "DELETE "; |
| 969 | 398 } |
| 399 | |
| 978 | 400 target = s;*/ |
|
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401 |
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402 for (Children::const_iterator it = children_.begin(); |
| 1303 | 403 it != children_.end(); ++it) |
| 969 | 404 { |
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405 it->second->CreateSiteMap(target[it->first]); |
| 969 | 406 } |
| 407 | |
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408 for (Children::const_iterator it = wildcardChildren_.begin(); |
| 1303 | 409 it != wildcardChildren_.end(); ++it) |
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410 { |
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411 it->second->CreateSiteMap(target["<" + it->first + ">"]); |
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412 } |
| 969 | 413 } |
| 414 | |
| 4300 | 415 bool RestApiHierarchy::GetDirectory(Json::Value &result, const UriComponents &uri) |
| 416 { | |
| 417 return GetDirectory(result, uri, 0); | |
| 418 } | |
| 419 | |
| 978 | 420 |
| 421 bool RestApiHierarchy::LookupResource(const UriComponents& uri, | |
| 422 IVisitor& visitor) | |
| 969 | 423 { |
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424 HttpToolbox::Arguments components; |
| 978 | 425 return LookupResource(components, uri, visitor, 0); |
| 969 | 426 } |
| 427 | |
| 978 | 428 |
| 429 | |
| 430 namespace | |
| 431 { | |
| 432 // Anonymous namespace to avoid clashes between compilation modules | |
| 433 | |
| 434 class AcceptedMethodsVisitor : public RestApiHierarchy::IVisitor | |
| 435 { | |
| 436 private: | |
| 437 std::set<HttpMethod>& methods_; | |
| 438 | |
| 439 public: | |
|
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440 explicit AcceptedMethodsVisitor(std::set<HttpMethod>& methods) : |
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441 methods_(methods) |
| 978 | 442 { |
| 443 } | |
| 444 | |
| 445 virtual bool Visit(const RestApiHierarchy::Resource& resource, | |
| 446 const UriComponents& uri, | |
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447 bool hasTrailing, |
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448 const HttpToolbox::Arguments& components, |
| 978 | 449 const UriComponents& trailing) |
| 450 { | |
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451 if (!hasTrailing) // Ignore universal handlers |
| 978 | 452 { |
| 4400 | 453 if (resource.HasHandler(HttpMethod_Get)) |
| 978 | 454 { |
| 455 methods_.insert(HttpMethod_Get); | |
| 456 } | |
| 457 | |
| 4400 | 458 if (resource.HasHandler(HttpMethod_Post)) |
| 978 | 459 { |
| 460 methods_.insert(HttpMethod_Post); | |
| 461 } | |
| 462 | |
| 4400 | 463 if (resource.HasHandler(HttpMethod_Put)) |
| 978 | 464 { |
| 465 methods_.insert(HttpMethod_Put); | |
| 466 } | |
| 467 | |
| 4400 | 468 if (resource.HasHandler(HttpMethod_Delete)) |
| 978 | 469 { |
| 470 methods_.insert(HttpMethod_Delete); | |
| 471 } | |
| 472 } | |
| 473 | |
| 474 return false; // Continue to check all the possible ways to access this URI | |
| 475 } | |
| 476 }; | |
| 477 } | |
| 478 | |
| 479 void RestApiHierarchy::GetAcceptedMethods(std::set<HttpMethod>& methods, | |
| 480 const UriComponents& uri) | |
| 969 | 481 { |
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482 HttpToolbox::Arguments components; |
| 978 | 483 AcceptedMethodsVisitor visitor(methods); |
|
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484 if (LookupResource(components, uri, visitor, 0)) |
| 978 | 485 { |
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486 Json::Value d; |
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487 if (GetDirectory(d, uri)) |
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488 { |
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489 methods.insert(HttpMethod_Get); |
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490 } |
| 978 | 491 } |
| 492 } | |
| 4300 | 493 |
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494 void RestApiHierarchy::ExploreAllResources(IVisitor& visitor, |
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495 const UriComponents& path, |
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496 const std::set<std::string>& uriArguments) const |
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497 { |
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498 HttpToolbox::Arguments args; |
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499 |
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500 for (std::set<std::string>::const_iterator it = uriArguments.begin(); it != uriArguments.end(); ++it) |
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501 { |
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502 args[*it] = ""; |
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503 } |
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504 |
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505 if (!handlers_.IsEmpty()) |
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506 { |
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507 visitor.Visit(handlers_, path, false, args, UriComponents()); |
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508 } |
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509 |
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510 if (!handlersWithTrailing_.IsEmpty()) |
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511 { |
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512 visitor.Visit(handlersWithTrailing_, path, true, args, UriComponents()); |
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513 } |
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514 |
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515 for (Children::const_iterator |
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516 it = children_.begin(); it != children_.end(); ++it) |
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517 { |
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518 assert(it->second != NULL); |
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519 UriComponents c = path; |
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520 c.push_back(it->first); |
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521 it->second->ExploreAllResources(visitor, c, uriArguments); |
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522 } |
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523 |
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524 for (Children::const_iterator |
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525 it = wildcardChildren_.begin(); it != wildcardChildren_.end(); ++it) |
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526 { |
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527 if (uriArguments.find(it->first) != uriArguments.end()) |
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528 { |
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529 throw OrthancException(ErrorCode_InternalError, "Twice the same URI argument in a path: " + it->first); |
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530 } |
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531 |
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532 std::set<std::string> d = uriArguments; |
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533 d.insert(it->first); |
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534 |
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535 assert(it->second != NULL); |
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536 UriComponents c = path; |
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537 c.push_back("{" + it->first + "}"); |
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538 it->second->ExploreAllResources(visitor, c, d); |
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539 } |
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540 } |
| 969 | 541 } |