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annotate Core/RestApi/RestApiHierarchy.cpp @ 2419:f51e9e852299
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 06 Oct 2017 17:26:15 +0200 |
| parents | a3a65de1840f |
| children | 878b59270859 |
| 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 Osimis, Belgium |
| 969 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
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34 #include "../PrecompiledHeaders.h" |
| 969 | 35 #include "RestApiHierarchy.h" |
| 36 | |
| 975 | 37 #include "../OrthancException.h" |
| 38 | |
| 969 | 39 #include <cassert> |
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40 #include <stdio.h> |
| 969 | 41 |
| 42 namespace Orthanc | |
| 43 { | |
| 978 | 44 RestApiHierarchy::Resource::Resource() : |
| 972 | 45 getHandler_(NULL), |
| 46 postHandler_(NULL), | |
| 47 putHandler_(NULL), | |
| 48 deleteHandler_(NULL) | |
| 49 { | |
| 50 } | |
| 51 | |
| 52 | |
| 978 | 53 bool RestApiHierarchy::Resource::HasHandler(HttpMethod method) const |
| 972 | 54 { |
| 55 switch (method) | |
| 56 { | |
| 57 case HttpMethod_Get: | |
| 58 return getHandler_ != NULL; | |
| 59 | |
| 60 case HttpMethod_Post: | |
| 61 return postHandler_ != NULL; | |
| 62 | |
| 63 case HttpMethod_Put: | |
| 64 return putHandler_ != NULL; | |
| 65 | |
| 66 case HttpMethod_Delete: | |
| 67 return deleteHandler_ != NULL; | |
| 68 | |
| 69 default: | |
| 70 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 | |
| 978 | 75 bool RestApiHierarchy::Resource::IsEmpty() const |
| 969 | 76 { |
| 972 | 77 return (getHandler_ == NULL && |
| 78 postHandler_ == NULL && | |
| 79 putHandler_ == NULL && | |
| 80 deleteHandler_ == NULL); | |
| 81 } | |
| 82 | |
| 83 | |
| 969 | 84 RestApiHierarchy& RestApiHierarchy::AddChild(Children& children, |
| 85 const std::string& name) | |
| 86 { | |
| 87 Children::iterator it = children.find(name); | |
| 88 | |
| 89 if (it == children.end()) | |
| 90 { | |
| 91 // Create new child | |
| 92 RestApiHierarchy *child = new RestApiHierarchy; | |
| 93 children[name] = child; | |
| 94 return *child; | |
| 95 } | |
| 96 else | |
| 97 { | |
| 98 return *it->second; | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 | |
| 978 | 103 |
| 104 bool RestApiHierarchy::Resource::Handle(RestApiGetCall& call) const | |
| 105 { | |
| 106 if (getHandler_ != NULL) | |
| 107 { | |
| 108 getHandler_(call); | |
| 109 return true; | |
| 110 } | |
| 111 else | |
| 112 { | |
| 113 return false; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 | |
| 118 bool RestApiHierarchy::Resource::Handle(RestApiPutCall& call) const | |
| 119 { | |
| 120 if (putHandler_ != NULL) | |
| 121 { | |
| 122 putHandler_(call); | |
| 123 return true; | |
| 124 } | |
| 125 else | |
| 126 { | |
| 127 return false; | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 | |
| 132 bool RestApiHierarchy::Resource::Handle(RestApiPostCall& call) const | |
| 133 { | |
| 134 if (postHandler_ != NULL) | |
| 135 { | |
| 136 postHandler_(call); | |
| 137 return true; | |
| 138 } | |
| 139 else | |
| 140 { | |
| 141 return false; | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 | |
| 146 bool RestApiHierarchy::Resource::Handle(RestApiDeleteCall& call) const | |
| 147 { | |
| 148 if (deleteHandler_ != NULL) | |
| 149 { | |
| 150 deleteHandler_(call); | |
| 151 return true; | |
| 152 } | |
| 153 else | |
| 154 { | |
| 155 return false; | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 | |
| 160 | |
| 969 | 161 void RestApiHierarchy::DeleteChildren(Children& children) |
| 162 { | |
| 163 for (Children::iterator it = children.begin(); | |
| 1303 | 164 it != children.end(); ++it) |
| 969 | 165 { |
| 166 delete it->second; | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 | |
| 171 template <typename Handler> | |
| 172 void RestApiHierarchy::RegisterInternal(const RestApiPath& path, | |
| 173 Handler handler, | |
| 174 size_t level) | |
| 175 { | |
| 176 if (path.GetLevelCount() == level) | |
| 177 { | |
| 178 if (path.IsUniversalTrailing()) | |
| 179 { | |
| 180 universalHandlers_.Register(handler); | |
| 181 } | |
| 182 else | |
| 183 { | |
| 184 handlers_.Register(handler); | |
| 185 } | |
| 186 } | |
| 187 else | |
| 188 { | |
| 189 RestApiHierarchy* child; | |
| 190 if (path.IsWildcardLevel(level)) | |
| 191 { | |
| 192 child = &AddChild(wildcardChildren_, path.GetWildcardName(level)); | |
| 193 } | |
| 194 else | |
| 195 { | |
| 196 child = &AddChild(children_, path.GetLevelName(level)); | |
| 197 } | |
| 198 | |
| 199 child->RegisterInternal(path, handler, level + 1); | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 | |
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204 bool RestApiHierarchy::LookupResource(IHttpHandler::Arguments& components, |
| 969 | 205 const UriComponents& uri, |
| 978 | 206 IVisitor& visitor, |
| 207 size_t level) | |
| 969 | 208 { |
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209 if (uri.size() != 0 && |
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210 level > uri.size()) |
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211 { |
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212 return false; |
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213 } |
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214 |
| 969 | 215 UriComponents trailing; |
| 216 | |
| 217 // Look for an exact match on the resource of interest | |
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218 if (uri.size() == 0 || |
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219 level == uri.size()) |
| 969 | 220 { |
| 221 if (!handlers_.IsEmpty() && | |
| 978 | 222 visitor.Visit(handlers_, uri, components, trailing)) |
| 969 | 223 { |
| 224 return true; | |
| 225 } | |
| 226 } | |
| 227 | |
| 228 | |
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229 if (level < uri.size()) // A recursive call is possible |
| 969 | 230 { |
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231 // Try and go down in the hierarchy, using an exact match for the child |
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232 Children::const_iterator child = children_.find(uri[level]); |
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233 if (child != children_.end()) |
| 969 | 234 { |
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235 if (child->second->LookupResource(components, uri, visitor, level + 1)) |
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236 { |
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237 return true; |
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238 } |
| 969 | 239 } |
| 240 | |
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241 // Try and go down in the hierarchy, using wildcard rules for children |
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242 for (child = wildcardChildren_.begin(); |
| 1303 | 243 child != wildcardChildren_.end(); ++child) |
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244 { |
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245 IHttpHandler::Arguments subComponents = components; |
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246 subComponents[child->first] = uri[level]; |
| 969 | 247 |
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248 if (child->second->LookupResource(subComponents, uri, visitor, level + 1)) |
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249 { |
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250 return true; |
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251 } |
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252 } |
| 969 | 253 } |
| 254 | |
| 255 | |
| 256 // As a last resort, call the universal handlers, if any | |
| 257 if (!universalHandlers_.IsEmpty()) | |
| 258 { | |
| 259 trailing.resize(uri.size() - level); | |
| 260 size_t pos = 0; | |
| 261 for (size_t i = level; i < uri.size(); i++, pos++) | |
| 262 { | |
| 263 trailing[pos] = uri[i]; | |
| 264 } | |
| 265 | |
| 266 assert(pos == trailing.size()); | |
| 267 | |
| 978 | 268 if (visitor.Visit(universalHandlers_, uri, components, trailing)) |
| 969 | 269 { |
| 270 return true; | |
| 271 } | |
| 272 } | |
| 273 | |
| 274 return false; | |
| 275 } | |
| 276 | |
| 277 | |
| 978 | 278 bool RestApiHierarchy::CanGenerateDirectory() const |
| 279 { | |
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280 return (universalHandlers_.IsEmpty() && |
| 1303 | 281 wildcardChildren_.empty()); |
| 978 | 282 } |
| 283 | |
| 284 | |
| 969 | 285 bool RestApiHierarchy::GetDirectory(Json::Value& result, |
| 286 const UriComponents& uri, | |
| 287 size_t level) | |
| 288 { | |
| 289 if (uri.size() == level) | |
| 290 { | |
| 978 | 291 if (CanGenerateDirectory()) |
| 969 | 292 { |
| 293 result = Json::arrayValue; | |
| 294 | |
| 295 for (Children::const_iterator it = children_.begin(); | |
| 1303 | 296 it != children_.end(); ++it) |
| 969 | 297 { |
| 298 result.append(it->first); | |
| 299 } | |
| 300 | |
| 301 return true; | |
| 302 } | |
| 303 else | |
| 304 { | |
| 305 return false; | |
| 306 } | |
| 307 } | |
| 308 | |
| 309 Children::const_iterator child = children_.find(uri[level]); | |
| 310 if (child != children_.end()) | |
| 311 { | |
| 312 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 313 { | |
| 314 return true; | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 for (child = wildcardChildren_.begin(); | |
| 1303 | 319 child != wildcardChildren_.end(); ++child) |
| 969 | 320 { |
| 321 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 322 { | |
| 323 return true; | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 return false; | |
| 328 } | |
| 329 | |
| 330 | |
| 331 RestApiHierarchy::~RestApiHierarchy() | |
| 332 { | |
| 333 DeleteChildren(children_); | |
| 334 DeleteChildren(wildcardChildren_); | |
| 335 } | |
| 336 | |
| 970 | 337 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 338 RestApiGetCall::Handler handler) |
| 969 | 339 { |
| 970 | 340 RestApiPath path(uri); |
| 969 | 341 RegisterInternal(path, handler, 0); |
| 342 } | |
| 343 | |
| 970 | 344 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 345 RestApiPutCall::Handler handler) |
| 969 | 346 { |
| 970 | 347 RestApiPath path(uri); |
| 969 | 348 RegisterInternal(path, handler, 0); |
| 349 } | |
| 350 | |
| 970 | 351 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 352 RestApiPostCall::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 RestApiDeleteCall::Handler handler) |
| 969 | 360 { |
| 970 | 361 RestApiPath path(uri); |
| 969 | 362 RegisterInternal(path, handler, 0); |
| 363 } | |
| 364 | |
| 365 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const | |
| 366 { | |
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367 target = Json::objectValue; |
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368 |
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369 /*std::string s = " "; |
| 972 | 370 if (handlers_.HasHandler(HttpMethod_Get)) |
| 969 | 371 { |
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372 s += "GET "; |
| 969 | 373 } |
| 374 | |
| 972 | 375 if (handlers_.HasHandler(HttpMethod_Post)) |
| 969 | 376 { |
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377 s += "POST "; |
| 969 | 378 } |
| 379 | |
| 972 | 380 if (handlers_.HasHandler(HttpMethod_Put)) |
| 969 | 381 { |
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382 s += "PUT "; |
| 969 | 383 } |
| 384 | |
| 972 | 385 if (handlers_.HasHandler(HttpMethod_Delete)) |
| 969 | 386 { |
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387 s += "DELETE "; |
| 969 | 388 } |
| 389 | |
| 978 | 390 target = s;*/ |
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391 |
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392 for (Children::const_iterator it = children_.begin(); |
| 1303 | 393 it != children_.end(); ++it) |
| 969 | 394 { |
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395 it->second->CreateSiteMap(target[it->first]); |
| 969 | 396 } |
| 397 | |
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398 for (Children::const_iterator it = wildcardChildren_.begin(); |
| 1303 | 399 it != wildcardChildren_.end(); ++it) |
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400 { |
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401 it->second->CreateSiteMap(target["<" + it->first + ">"]); |
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402 } |
| 969 | 403 } |
| 404 | |
| 978 | 405 |
| 406 bool RestApiHierarchy::LookupResource(const UriComponents& uri, | |
| 407 IVisitor& visitor) | |
| 969 | 408 { |
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409 IHttpHandler::Arguments components; |
| 978 | 410 return LookupResource(components, uri, visitor, 0); |
| 969 | 411 } |
| 412 | |
| 978 | 413 |
| 414 | |
| 415 namespace | |
| 416 { | |
| 417 // Anonymous namespace to avoid clashes between compilation modules | |
| 418 | |
| 419 class AcceptedMethodsVisitor : public RestApiHierarchy::IVisitor | |
| 420 { | |
| 421 private: | |
| 422 std::set<HttpMethod>& methods_; | |
| 423 | |
| 424 public: | |
| 425 AcceptedMethodsVisitor(std::set<HttpMethod>& methods) : methods_(methods) | |
| 426 { | |
| 427 } | |
| 428 | |
| 429 virtual bool Visit(const RestApiHierarchy::Resource& resource, | |
| 430 const UriComponents& uri, | |
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431 const IHttpHandler::Arguments& components, |
| 978 | 432 const UriComponents& trailing) |
| 433 { | |
| 434 if (trailing.size() == 0) // Ignore universal handlers | |
| 435 { | |
| 436 if (resource.HasHandler(HttpMethod_Get)) | |
| 437 { | |
| 438 methods_.insert(HttpMethod_Get); | |
| 439 } | |
| 440 | |
| 441 if (resource.HasHandler(HttpMethod_Post)) | |
| 442 { | |
| 443 methods_.insert(HttpMethod_Post); | |
| 444 } | |
| 445 | |
| 446 if (resource.HasHandler(HttpMethod_Put)) | |
| 447 { | |
| 448 methods_.insert(HttpMethod_Put); | |
| 449 } | |
| 450 | |
| 451 if (resource.HasHandler(HttpMethod_Delete)) | |
| 452 { | |
| 453 methods_.insert(HttpMethod_Delete); | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 return false; // Continue to check all the possible ways to access this URI | |
| 458 } | |
| 459 }; | |
| 460 } | |
| 461 | |
| 462 void RestApiHierarchy::GetAcceptedMethods(std::set<HttpMethod>& methods, | |
| 463 const UriComponents& uri) | |
| 969 | 464 { |
|
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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465 IHttpHandler::Arguments components; |
| 978 | 466 AcceptedMethodsVisitor visitor(methods); |
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refactoring: OrthancHttpHandler inside OrthancServer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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changeset
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467 if (LookupResource(components, uri, visitor, 0)) |
| 978 | 468 { |
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refactoring: OrthancHttpHandler inside OrthancServer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1441
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changeset
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469 Json::Value d; |
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b2b09a3dbd8e
refactoring: OrthancHttpHandler inside OrthancServer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1441
diff
changeset
|
470 if (GetDirectory(d, uri)) |
|
b2b09a3dbd8e
refactoring: OrthancHttpHandler inside OrthancServer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1441
diff
changeset
|
471 { |
|
b2b09a3dbd8e
refactoring: OrthancHttpHandler inside OrthancServer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1441
diff
changeset
|
472 methods.insert(HttpMethod_Get); |
|
b2b09a3dbd8e
refactoring: OrthancHttpHandler inside OrthancServer
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1441
diff
changeset
|
473 } |
| 978 | 474 } |
| 475 } | |
| 969 | 476 } |