Mercurial > hg > orthanc
annotate OrthancFramework/Sources/RestApi/RestApiHierarchy.cpp @ 4119:bf7b9edf6b81 framework-lgpl
re-licensing the OrthancFramework to LGPL, in order to license Stone of Orthanc under LGPL
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 07 Jul 2020 19:17:56 +0200 |
| parents | d25f4c0fa160 |
| children | 4d42408da117 |
| 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 | |
| 978 | 64 bool RestApiHierarchy::Resource::IsEmpty() const |
| 969 | 65 { |
| 972 | 66 return (getHandler_ == NULL && |
| 67 postHandler_ == NULL && | |
| 68 putHandler_ == NULL && | |
| 69 deleteHandler_ == NULL); | |
| 70 } | |
| 71 | |
| 72 | |
| 969 | 73 RestApiHierarchy& RestApiHierarchy::AddChild(Children& children, |
| 74 const std::string& name) | |
| 75 { | |
| 76 Children::iterator it = children.find(name); | |
| 77 | |
| 78 if (it == children.end()) | |
| 79 { | |
| 80 // Create new child | |
| 81 RestApiHierarchy *child = new RestApiHierarchy; | |
| 82 children[name] = child; | |
| 83 return *child; | |
| 84 } | |
| 85 else | |
| 86 { | |
| 87 return *it->second; | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 | |
| 978 | 92 |
| 93 bool RestApiHierarchy::Resource::Handle(RestApiGetCall& call) const | |
| 94 { | |
| 95 if (getHandler_ != NULL) | |
| 96 { | |
| 97 getHandler_(call); | |
| 98 return true; | |
| 99 } | |
| 100 else | |
| 101 { | |
| 102 return false; | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 | |
| 107 bool RestApiHierarchy::Resource::Handle(RestApiPutCall& call) const | |
| 108 { | |
| 109 if (putHandler_ != NULL) | |
| 110 { | |
| 111 putHandler_(call); | |
| 112 return true; | |
| 113 } | |
| 114 else | |
| 115 { | |
| 116 return false; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 | |
| 121 bool RestApiHierarchy::Resource::Handle(RestApiPostCall& call) const | |
| 122 { | |
| 123 if (postHandler_ != NULL) | |
| 124 { | |
| 125 postHandler_(call); | |
| 126 return true; | |
| 127 } | |
| 128 else | |
| 129 { | |
| 130 return false; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 | |
| 135 bool RestApiHierarchy::Resource::Handle(RestApiDeleteCall& call) const | |
| 136 { | |
| 137 if (deleteHandler_ != NULL) | |
| 138 { | |
| 139 deleteHandler_(call); | |
| 140 return true; | |
| 141 } | |
| 142 else | |
| 143 { | |
| 144 return false; | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 | |
| 149 | |
| 969 | 150 void RestApiHierarchy::DeleteChildren(Children& children) |
| 151 { | |
| 152 for (Children::iterator it = children.begin(); | |
| 1303 | 153 it != children.end(); ++it) |
| 969 | 154 { |
| 155 delete it->second; | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 | |
| 160 template <typename Handler> | |
| 161 void RestApiHierarchy::RegisterInternal(const RestApiPath& path, | |
| 162 Handler handler, | |
| 163 size_t level) | |
| 164 { | |
| 165 if (path.GetLevelCount() == level) | |
| 166 { | |
| 167 if (path.IsUniversalTrailing()) | |
| 168 { | |
| 169 universalHandlers_.Register(handler); | |
| 170 } | |
| 171 else | |
| 172 { | |
| 173 handlers_.Register(handler); | |
| 174 } | |
| 175 } | |
| 176 else | |
| 177 { | |
| 178 RestApiHierarchy* child; | |
| 179 if (path.IsWildcardLevel(level)) | |
| 180 { | |
| 181 child = &AddChild(wildcardChildren_, path.GetWildcardName(level)); | |
| 182 } | |
| 183 else | |
| 184 { | |
| 185 child = &AddChild(children_, path.GetLevelName(level)); | |
| 186 } | |
| 187 | |
| 188 child->RegisterInternal(path, handler, level + 1); | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 | |
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193 bool RestApiHierarchy::LookupResource(IHttpHandler::Arguments& components, |
| 969 | 194 const UriComponents& uri, |
| 978 | 195 IVisitor& visitor, |
| 196 size_t level) | |
| 969 | 197 { |
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198 if (uri.size() != 0 && |
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199 level > uri.size()) |
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200 { |
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201 return false; |
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202 } |
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203 |
| 969 | 204 UriComponents trailing; |
| 205 | |
| 206 // Look for an exact match on the resource of interest | |
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207 if (uri.size() == 0 || |
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208 level == uri.size()) |
| 969 | 209 { |
| 210 if (!handlers_.IsEmpty() && | |
| 978 | 211 visitor.Visit(handlers_, uri, components, trailing)) |
| 969 | 212 { |
| 213 return true; | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 | |
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218 if (level < uri.size()) // A recursive call is possible |
| 969 | 219 { |
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220 // Try and go down in the hierarchy, using an exact match for the child |
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221 Children::const_iterator child = children_.find(uri[level]); |
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222 if (child != children_.end()) |
| 969 | 223 { |
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224 if (child->second->LookupResource(components, uri, visitor, level + 1)) |
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225 { |
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226 return true; |
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227 } |
| 969 | 228 } |
| 229 | |
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230 // Try and go down in the hierarchy, using wildcard rules for children |
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231 for (child = wildcardChildren_.begin(); |
| 1303 | 232 child != wildcardChildren_.end(); ++child) |
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233 { |
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234 IHttpHandler::Arguments subComponents = components; |
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235 subComponents[child->first] = uri[level]; |
| 969 | 236 |
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237 if (child->second->LookupResource(subComponents, uri, visitor, level + 1)) |
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238 { |
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239 return true; |
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240 } |
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241 } |
| 969 | 242 } |
| 243 | |
| 244 | |
| 245 // As a last resort, call the universal handlers, if any | |
| 246 if (!universalHandlers_.IsEmpty()) | |
| 247 { | |
| 248 trailing.resize(uri.size() - level); | |
| 249 size_t pos = 0; | |
| 250 for (size_t i = level; i < uri.size(); i++, pos++) | |
| 251 { | |
| 252 trailing[pos] = uri[i]; | |
| 253 } | |
| 254 | |
| 255 assert(pos == trailing.size()); | |
| 256 | |
| 978 | 257 if (visitor.Visit(universalHandlers_, uri, components, trailing)) |
| 969 | 258 { |
| 259 return true; | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 return false; | |
| 264 } | |
| 265 | |
| 266 | |
| 978 | 267 bool RestApiHierarchy::CanGenerateDirectory() const |
| 268 { | |
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269 return (universalHandlers_.IsEmpty() && |
| 1303 | 270 wildcardChildren_.empty()); |
| 978 | 271 } |
| 272 | |
| 273 | |
| 969 | 274 bool RestApiHierarchy::GetDirectory(Json::Value& result, |
| 275 const UriComponents& uri, | |
| 276 size_t level) | |
| 277 { | |
| 278 if (uri.size() == level) | |
| 279 { | |
| 978 | 280 if (CanGenerateDirectory()) |
| 969 | 281 { |
| 282 result = Json::arrayValue; | |
| 283 | |
| 284 for (Children::const_iterator it = children_.begin(); | |
| 1303 | 285 it != children_.end(); ++it) |
| 969 | 286 { |
| 287 result.append(it->first); | |
| 288 } | |
| 289 | |
| 290 return true; | |
| 291 } | |
| 292 else | |
| 293 { | |
| 294 return false; | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 Children::const_iterator child = children_.find(uri[level]); | |
| 299 if (child != children_.end()) | |
| 300 { | |
| 301 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 302 { | |
| 303 return true; | |
| 304 } | |
| 305 } | |
| 306 | |
| 307 for (child = wildcardChildren_.begin(); | |
| 1303 | 308 child != wildcardChildren_.end(); ++child) |
| 969 | 309 { |
| 310 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 311 { | |
| 312 return true; | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 return false; | |
| 317 } | |
| 318 | |
| 319 | |
| 320 RestApiHierarchy::~RestApiHierarchy() | |
| 321 { | |
| 322 DeleteChildren(children_); | |
| 323 DeleteChildren(wildcardChildren_); | |
| 324 } | |
| 325 | |
| 970 | 326 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 327 RestApiGetCall::Handler handler) |
| 969 | 328 { |
| 970 | 329 RestApiPath path(uri); |
| 969 | 330 RegisterInternal(path, handler, 0); |
| 331 } | |
| 332 | |
| 970 | 333 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 334 RestApiPutCall::Handler handler) |
| 969 | 335 { |
| 970 | 336 RestApiPath path(uri); |
| 969 | 337 RegisterInternal(path, handler, 0); |
| 338 } | |
| 339 | |
| 970 | 340 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 341 RestApiPostCall::Handler handler) |
| 969 | 342 { |
| 970 | 343 RestApiPath path(uri); |
| 969 | 344 RegisterInternal(path, handler, 0); |
| 345 } | |
| 346 | |
| 970 | 347 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 348 RestApiDeleteCall::Handler handler) |
| 969 | 349 { |
| 970 | 350 RestApiPath path(uri); |
| 969 | 351 RegisterInternal(path, handler, 0); |
| 352 } | |
| 353 | |
| 354 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const | |
| 355 { | |
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356 target = Json::objectValue; |
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357 |
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358 /*std::string s = " "; |
| 972 | 359 if (handlers_.HasHandler(HttpMethod_Get)) |
| 969 | 360 { |
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361 s += "GET "; |
| 969 | 362 } |
| 363 | |
| 972 | 364 if (handlers_.HasHandler(HttpMethod_Post)) |
| 969 | 365 { |
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366 s += "POST "; |
| 969 | 367 } |
| 368 | |
| 972 | 369 if (handlers_.HasHandler(HttpMethod_Put)) |
| 969 | 370 { |
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371 s += "PUT "; |
| 969 | 372 } |
| 373 | |
| 972 | 374 if (handlers_.HasHandler(HttpMethod_Delete)) |
| 969 | 375 { |
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376 s += "DELETE "; |
| 969 | 377 } |
| 378 | |
| 978 | 379 target = s;*/ |
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380 |
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381 for (Children::const_iterator it = children_.begin(); |
| 1303 | 382 it != children_.end(); ++it) |
| 969 | 383 { |
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384 it->second->CreateSiteMap(target[it->first]); |
| 969 | 385 } |
| 386 | |
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387 for (Children::const_iterator it = wildcardChildren_.begin(); |
| 1303 | 388 it != wildcardChildren_.end(); ++it) |
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389 { |
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390 it->second->CreateSiteMap(target["<" + it->first + ">"]); |
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391 } |
| 969 | 392 } |
| 393 | |
| 978 | 394 |
| 395 bool RestApiHierarchy::LookupResource(const UriComponents& uri, | |
| 396 IVisitor& visitor) | |
| 969 | 397 { |
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398 IHttpHandler::Arguments components; |
| 978 | 399 return LookupResource(components, uri, visitor, 0); |
| 969 | 400 } |
| 401 | |
| 978 | 402 |
| 403 | |
| 404 namespace | |
| 405 { | |
| 406 // Anonymous namespace to avoid clashes between compilation modules | |
| 407 | |
| 408 class AcceptedMethodsVisitor : public RestApiHierarchy::IVisitor | |
| 409 { | |
| 410 private: | |
| 411 std::set<HttpMethod>& methods_; | |
| 412 | |
| 413 public: | |
| 414 AcceptedMethodsVisitor(std::set<HttpMethod>& methods) : methods_(methods) | |
| 415 { | |
| 416 } | |
| 417 | |
| 418 virtual bool Visit(const RestApiHierarchy::Resource& resource, | |
| 419 const UriComponents& uri, | |
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420 const IHttpHandler::Arguments& components, |
| 978 | 421 const UriComponents& trailing) |
| 422 { | |
| 423 if (trailing.size() == 0) // Ignore universal handlers | |
| 424 { | |
| 425 if (resource.HasHandler(HttpMethod_Get)) | |
| 426 { | |
| 427 methods_.insert(HttpMethod_Get); | |
| 428 } | |
| 429 | |
| 430 if (resource.HasHandler(HttpMethod_Post)) | |
| 431 { | |
| 432 methods_.insert(HttpMethod_Post); | |
| 433 } | |
| 434 | |
| 435 if (resource.HasHandler(HttpMethod_Put)) | |
| 436 { | |
| 437 methods_.insert(HttpMethod_Put); | |
| 438 } | |
| 439 | |
| 440 if (resource.HasHandler(HttpMethod_Delete)) | |
| 441 { | |
| 442 methods_.insert(HttpMethod_Delete); | |
| 443 } | |
| 444 } | |
| 445 | |
| 446 return false; // Continue to check all the possible ways to access this URI | |
| 447 } | |
| 448 }; | |
| 449 } | |
| 450 | |
| 451 void RestApiHierarchy::GetAcceptedMethods(std::set<HttpMethod>& methods, | |
| 452 const UriComponents& uri) | |
| 969 | 453 { |
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454 IHttpHandler::Arguments components; |
| 978 | 455 AcceptedMethodsVisitor visitor(methods); |
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456 if (LookupResource(components, uri, visitor, 0)) |
| 978 | 457 { |
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458 Json::Value d; |
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459 if (GetDirectory(d, uri)) |
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460 { |
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461 methods.insert(HttpMethod_Get); |
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462 } |
| 978 | 463 } |
| 464 } | |
| 969 | 465 } |