Mercurial > hg > orthanc
annotate Core/RestApi/RestApiHierarchy.cpp @ 980:f1ff2a2f06cd plugins
use RestApiHierarchy inside RestApi
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 30 Jun 2014 17:41:40 +0200 |
| parents | ce3106e5843f |
| children | 0332e6e8c679 |
| rev | line source |
|---|---|
| 969 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, | |
| 4 * Belgium | |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 10 * | |
| 11 * In addition, as a special exception, the copyright holders of this | |
| 12 * program give permission to link the code of its release with the | |
| 13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 14 * that use the same license as the "OpenSSL" library), and distribute | |
| 15 * the linked executables. You must obey the GNU General Public License | |
| 16 * in all respects for all of the code used other than "OpenSSL". If you | |
| 17 * modify file(s) with this exception, you may extend this exception to | |
| 18 * your version of the file(s), but you are not obligated to do so. If | |
| 19 * you do not wish to do so, delete this exception statement from your | |
| 20 * version. If you delete this exception statement from all source files | |
| 21 * in the program, then also delete it here. | |
| 22 * | |
| 23 * This program is distributed in the hope that it will be useful, but | |
| 24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 26 * General Public License for more details. | |
| 27 * | |
| 28 * You should have received a copy of the GNU General Public License | |
| 29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 30 **/ | |
| 31 | |
| 32 | |
| 33 #include "RestApiHierarchy.h" | |
| 34 | |
| 975 | 35 #include "../OrthancException.h" |
| 36 | |
| 969 | 37 #include <cassert> |
| 38 | |
| 39 namespace Orthanc | |
| 40 { | |
| 978 | 41 RestApiHierarchy::Resource::Resource() : |
| 972 | 42 getHandler_(NULL), |
| 43 postHandler_(NULL), | |
| 44 putHandler_(NULL), | |
| 45 deleteHandler_(NULL) | |
| 46 { | |
| 47 } | |
| 48 | |
| 49 | |
| 978 | 50 bool RestApiHierarchy::Resource::HasHandler(HttpMethod method) const |
| 972 | 51 { |
| 52 switch (method) | |
| 53 { | |
| 54 case HttpMethod_Get: | |
| 55 return getHandler_ != NULL; | |
| 56 | |
| 57 case HttpMethod_Post: | |
| 58 return postHandler_ != NULL; | |
| 59 | |
| 60 case HttpMethod_Put: | |
| 61 return putHandler_ != NULL; | |
| 62 | |
| 63 case HttpMethod_Delete: | |
| 64 return deleteHandler_ != NULL; | |
| 65 | |
| 66 default: | |
| 67 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 | |
| 978 | 72 bool RestApiHierarchy::Resource::IsEmpty() const |
| 969 | 73 { |
| 972 | 74 return (getHandler_ == NULL && |
| 75 postHandler_ == NULL && | |
| 76 putHandler_ == NULL && | |
| 77 deleteHandler_ == NULL); | |
| 78 } | |
| 79 | |
| 80 | |
| 969 | 81 RestApiHierarchy& RestApiHierarchy::AddChild(Children& children, |
| 82 const std::string& name) | |
| 83 { | |
| 84 Children::iterator it = children.find(name); | |
| 85 | |
| 86 if (it == children.end()) | |
| 87 { | |
| 88 // Create new child | |
| 89 RestApiHierarchy *child = new RestApiHierarchy; | |
| 90 children[name] = child; | |
| 91 return *child; | |
| 92 } | |
| 93 else | |
| 94 { | |
| 95 return *it->second; | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 | |
| 978 | 100 |
| 101 bool RestApiHierarchy::Resource::Handle(RestApiGetCall& call) const | |
| 102 { | |
| 103 if (getHandler_ != NULL) | |
| 104 { | |
| 105 getHandler_(call); | |
| 106 return true; | |
| 107 } | |
| 108 else | |
| 109 { | |
| 110 return false; | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 | |
| 115 bool RestApiHierarchy::Resource::Handle(RestApiPutCall& call) const | |
| 116 { | |
| 117 if (putHandler_ != NULL) | |
| 118 { | |
| 119 putHandler_(call); | |
| 120 return true; | |
| 121 } | |
| 122 else | |
| 123 { | |
| 124 return false; | |
| 125 } | |
| 126 } | |
| 127 | |
| 128 | |
| 129 bool RestApiHierarchy::Resource::Handle(RestApiPostCall& call) const | |
| 130 { | |
| 131 if (postHandler_ != NULL) | |
| 132 { | |
| 133 postHandler_(call); | |
| 134 return true; | |
| 135 } | |
| 136 else | |
| 137 { | |
| 138 return false; | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 | |
| 143 bool RestApiHierarchy::Resource::Handle(RestApiDeleteCall& call) const | |
| 144 { | |
| 145 if (deleteHandler_ != NULL) | |
| 146 { | |
| 147 deleteHandler_(call); | |
| 148 return true; | |
| 149 } | |
| 150 else | |
| 151 { | |
| 152 return false; | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 | |
| 157 | |
| 969 | 158 void RestApiHierarchy::DeleteChildren(Children& children) |
| 159 { | |
| 160 for (Children::iterator it = children.begin(); | |
| 161 it != children.end(); it++) | |
| 162 { | |
| 163 delete it->second; | |
| 164 } | |
| 165 } | |
| 166 | |
| 167 | |
| 168 template <typename Handler> | |
| 169 void RestApiHierarchy::RegisterInternal(const RestApiPath& path, | |
| 170 Handler handler, | |
| 171 size_t level) | |
| 172 { | |
| 173 if (path.GetLevelCount() == level) | |
| 174 { | |
| 175 if (path.IsUniversalTrailing()) | |
| 176 { | |
| 177 universalHandlers_.Register(handler); | |
| 178 } | |
| 179 else | |
| 180 { | |
| 181 handlers_.Register(handler); | |
| 182 } | |
| 183 } | |
| 184 else | |
| 185 { | |
| 186 RestApiHierarchy* child; | |
| 187 if (path.IsWildcardLevel(level)) | |
| 188 { | |
| 189 child = &AddChild(wildcardChildren_, path.GetWildcardName(level)); | |
| 190 } | |
| 191 else | |
| 192 { | |
| 193 child = &AddChild(children_, path.GetLevelName(level)); | |
| 194 } | |
| 195 | |
| 196 child->RegisterInternal(path, handler, level + 1); | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 | |
| 978 | 201 bool RestApiHierarchy::LookupResource(HttpHandler::Arguments& components, |
| 969 | 202 const UriComponents& uri, |
| 978 | 203 IVisitor& visitor, |
| 204 size_t level) | |
| 969 | 205 { |
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206 if (uri.size() != 0 && |
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207 level > uri.size()) |
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208 { |
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209 return false; |
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210 } |
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211 |
| 969 | 212 UriComponents trailing; |
| 213 | |
| 214 // Look for an exact match on the resource of interest | |
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215 if (uri.size() == 0 || |
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216 level == uri.size()) |
| 969 | 217 { |
| 218 if (!handlers_.IsEmpty() && | |
| 978 | 219 visitor.Visit(handlers_, uri, components, trailing)) |
| 969 | 220 { |
| 221 return true; | |
| 222 } | |
| 223 } | |
| 224 | |
| 225 | |
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226 if (level < uri.size()) // A recursive call is possible |
| 969 | 227 { |
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228 // Try and go down in the hierarchy, using an exact match for the child |
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229 Children::const_iterator child = children_.find(uri[level]); |
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230 if (child != children_.end()) |
| 969 | 231 { |
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232 if (child->second->LookupResource(components, uri, visitor, level + 1)) |
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233 { |
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234 return true; |
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235 } |
| 969 | 236 } |
| 237 | |
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238 // Try and go down in the hierarchy, using wildcard rules for children |
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239 for (child = wildcardChildren_.begin(); |
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240 child != wildcardChildren_.end(); child++) |
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241 { |
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242 HttpHandler::Arguments subComponents = components; |
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243 subComponents[child->first] = uri[level]; |
| 969 | 244 |
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245 if (child->second->LookupResource(subComponents, uri, visitor, level + 1)) |
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246 { |
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247 return true; |
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248 } |
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249 } |
| 969 | 250 } |
| 251 | |
| 252 | |
| 253 // As a last resort, call the universal handlers, if any | |
| 254 if (!universalHandlers_.IsEmpty()) | |
| 255 { | |
| 256 trailing.resize(uri.size() - level); | |
| 257 size_t pos = 0; | |
| 258 for (size_t i = level; i < uri.size(); i++, pos++) | |
| 259 { | |
| 260 trailing[pos] = uri[i]; | |
| 261 } | |
| 262 | |
| 263 assert(pos == trailing.size()); | |
| 264 | |
| 978 | 265 if (visitor.Visit(universalHandlers_, uri, components, trailing)) |
| 969 | 266 { |
| 267 return true; | |
| 268 } | |
| 269 } | |
| 270 | |
| 271 return false; | |
| 272 } | |
| 273 | |
| 274 | |
| 978 | 275 bool RestApiHierarchy::CanGenerateDirectory() const |
| 276 { | |
| 277 return (!handlers_.HasHandler(HttpMethod_Get) && | |
| 278 universalHandlers_.IsEmpty() && | |
| 279 wildcardChildren_.size() == 0); | |
| 280 } | |
| 281 | |
| 282 | |
| 969 | 283 bool RestApiHierarchy::GetDirectory(Json::Value& result, |
| 284 const UriComponents& uri, | |
| 285 size_t level) | |
| 286 { | |
| 287 if (uri.size() == level) | |
| 288 { | |
| 978 | 289 if (CanGenerateDirectory()) |
| 969 | 290 { |
| 291 result = Json::arrayValue; | |
| 292 | |
| 293 for (Children::const_iterator it = children_.begin(); | |
| 294 it != children_.end(); it++) | |
| 295 { | |
| 296 result.append(it->first); | |
| 297 } | |
| 298 | |
| 299 return true; | |
| 300 } | |
| 301 else | |
| 302 { | |
| 303 return false; | |
| 304 } | |
| 305 } | |
| 306 | |
| 307 Children::const_iterator child = children_.find(uri[level]); | |
| 308 if (child != children_.end()) | |
| 309 { | |
| 310 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 311 { | |
| 312 return true; | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 for (child = wildcardChildren_.begin(); | |
| 317 child != wildcardChildren_.end(); child++) | |
| 318 { | |
| 319 if (child->second->GetDirectory(result, uri, level + 1)) | |
| 320 { | |
| 321 return true; | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 return false; | |
| 326 } | |
| 327 | |
| 328 | |
| 329 RestApiHierarchy::~RestApiHierarchy() | |
| 330 { | |
| 331 DeleteChildren(children_); | |
| 332 DeleteChildren(wildcardChildren_); | |
| 333 } | |
| 334 | |
| 970 | 335 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 336 RestApiGetCall::Handler handler) |
| 969 | 337 { |
| 970 | 338 RestApiPath path(uri); |
| 969 | 339 RegisterInternal(path, handler, 0); |
| 340 } | |
| 341 | |
| 970 | 342 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 343 RestApiPutCall::Handler handler) |
| 969 | 344 { |
| 970 | 345 RestApiPath path(uri); |
| 969 | 346 RegisterInternal(path, handler, 0); |
| 347 } | |
| 348 | |
| 970 | 349 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 350 RestApiPostCall::Handler handler) |
| 969 | 351 { |
| 970 | 352 RestApiPath path(uri); |
| 969 | 353 RegisterInternal(path, handler, 0); |
| 354 } | |
| 355 | |
| 970 | 356 void RestApiHierarchy::Register(const std::string& uri, |
| 974 | 357 RestApiDeleteCall::Handler handler) |
| 969 | 358 { |
| 970 | 359 RestApiPath path(uri); |
| 969 | 360 RegisterInternal(path, handler, 0); |
| 361 } | |
| 362 | |
| 363 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const | |
| 364 { | |
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365 target = Json::objectValue; |
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366 |
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367 /*std::string s = " "; |
| 972 | 368 if (handlers_.HasHandler(HttpMethod_Get)) |
| 969 | 369 { |
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370 s += "GET "; |
| 969 | 371 } |
| 372 | |
| 972 | 373 if (handlers_.HasHandler(HttpMethod_Post)) |
| 969 | 374 { |
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375 s += "POST "; |
| 969 | 376 } |
| 377 | |
| 972 | 378 if (handlers_.HasHandler(HttpMethod_Put)) |
| 969 | 379 { |
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380 s += "PUT "; |
| 969 | 381 } |
| 382 | |
| 972 | 383 if (handlers_.HasHandler(HttpMethod_Delete)) |
| 969 | 384 { |
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385 s += "DELETE "; |
| 969 | 386 } |
| 387 | |
| 978 | 388 target = s;*/ |
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389 |
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390 for (Children::const_iterator it = children_.begin(); |
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391 it != children_.end(); it++) |
| 969 | 392 { |
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393 it->second->CreateSiteMap(target[it->first]); |
| 969 | 394 } |
| 395 | |
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396 for (Children::const_iterator it = wildcardChildren_.begin(); |
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397 it != wildcardChildren_.end(); it++) |
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398 { |
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399 it->second->CreateSiteMap(target["<" + it->first + ">"]); |
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400 } |
| 969 | 401 } |
| 402 | |
| 978 | 403 |
| 404 bool RestApiHierarchy::LookupResource(const UriComponents& uri, | |
| 405 IVisitor& visitor) | |
| 969 | 406 { |
| 975 | 407 HttpHandler::Arguments components; |
| 978 | 408 return LookupResource(components, uri, visitor, 0); |
| 969 | 409 } |
| 410 | |
| 978 | 411 |
| 412 | |
| 413 namespace | |
| 414 { | |
| 415 // Anonymous namespace to avoid clashes between compilation modules | |
| 416 | |
| 417 class AcceptedMethodsVisitor : public RestApiHierarchy::IVisitor | |
| 418 { | |
| 419 private: | |
| 420 std::set<HttpMethod>& methods_; | |
| 421 | |
| 422 public: | |
| 423 AcceptedMethodsVisitor(std::set<HttpMethod>& methods) : methods_(methods) | |
| 424 { | |
| 425 } | |
| 426 | |
| 427 virtual bool Visit(const RestApiHierarchy::Resource& resource, | |
| 428 const UriComponents& uri, | |
| 429 const HttpHandler::Arguments& components, | |
| 430 const UriComponents& trailing) | |
| 431 { | |
| 432 if (trailing.size() == 0) // Ignore universal handlers | |
| 433 { | |
| 434 if (resource.HasHandler(HttpMethod_Get)) | |
| 435 { | |
| 436 methods_.insert(HttpMethod_Get); | |
| 437 } | |
| 438 | |
| 439 if (resource.HasHandler(HttpMethod_Post)) | |
| 440 { | |
| 441 methods_.insert(HttpMethod_Post); | |
| 442 } | |
| 443 | |
| 444 if (resource.HasHandler(HttpMethod_Put)) | |
| 445 { | |
| 446 methods_.insert(HttpMethod_Put); | |
| 447 } | |
| 448 | |
| 449 if (resource.HasHandler(HttpMethod_Delete)) | |
| 450 { | |
| 451 methods_.insert(HttpMethod_Delete); | |
| 452 } | |
| 453 } | |
| 454 | |
| 455 return false; // Continue to check all the possible ways to access this URI | |
| 456 } | |
| 457 }; | |
| 458 } | |
| 459 | |
| 460 void RestApiHierarchy::GetAcceptedMethods(std::set<HttpMethod>& methods, | |
| 461 const UriComponents& uri) | |
| 969 | 462 { |
| 975 | 463 HttpHandler::Arguments components; |
| 978 | 464 AcceptedMethodsVisitor visitor(methods); |
| 465 LookupResource(components, uri, visitor, 0); | |
| 969 | 466 |
| 978 | 467 Json::Value d; |
| 468 if (GetDirectory(d, uri)) | |
| 469 { | |
| 470 methods.insert(HttpMethod_Get); | |
| 471 } | |
| 472 } | |
| 969 | 473 } |