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annotate Core/HttpServer/MongooseServer.cpp @ 43:9be852ad33d2
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 04 Sep 2012 09:59:34 +0200 |
| parents | 96e57b863dd9 |
| children | a15e90e5d6fc |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Palantir - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012 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 * This program is distributed in the hope that it will be useful, but | |
| 12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License | |
| 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 **/ | |
| 19 | |
| 20 | |
| 21 // http://en.highscore.de/cpp/boost/stringhandling.html | |
| 22 | |
| 23 #include "MongooseServer.h" | |
| 24 | |
| 25 #include <algorithm> | |
| 26 #include <string.h> | |
| 27 #include <boost/lexical_cast.hpp> | |
| 28 #include <boost/algorithm/string.hpp> | |
| 29 #include <iostream> | |
| 30 #include <string.h> | |
| 31 #include <stdio.h> | |
| 32 #include <boost/thread.hpp> | |
| 33 | |
| 34 #include "../PalantirException.h" | |
| 35 #include "../ChunkedBuffer.h" | |
| 36 #include "mongoose.h" | |
| 37 | |
| 38 | |
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39 #define PALANTIR_REALM "Palantir Secure Area" |
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40 |
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41 static const long LOCALHOST = (127ll << 24) + 1ll; |
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42 |
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43 |
| 0 | 44 namespace Palantir |
| 45 { | |
| 46 static const char multipart[] = "multipart/form-data; boundary="; | |
| 47 static unsigned int multipartLength = sizeof(multipart) / sizeof(char) - 1; | |
| 48 | |
| 49 | |
| 50 namespace | |
| 51 { | |
| 52 // Anonymous namespace to avoid clashes between compilation modules | |
| 53 class MongooseOutput : public HttpOutput | |
| 54 { | |
| 55 private: | |
| 56 struct mg_connection* connection_; | |
| 57 | |
| 58 public: | |
| 59 MongooseOutput(struct mg_connection* connection) : connection_(connection) | |
| 60 { | |
| 61 } | |
| 62 | |
| 63 virtual void Send(const void* buffer, size_t length) | |
| 64 { | |
| 65 mg_write(connection_, buffer, length); | |
| 66 } | |
| 67 }; | |
| 68 | |
| 69 | |
| 70 enum PostDataStatus | |
| 71 { | |
| 72 PostDataStatus_Success, | |
| 73 PostDataStatus_NoLength, | |
| 74 PostDataStatus_Pending, | |
| 75 PostDataStatus_Failure | |
| 76 }; | |
| 77 } | |
| 78 | |
| 79 | |
| 80 // TODO Move this to external file | |
| 81 | |
| 82 | |
| 83 class ChunkedFile : public ChunkedBuffer | |
| 84 { | |
| 85 private: | |
| 86 std::string filename_; | |
| 87 | |
| 88 public: | |
| 89 ChunkedFile(const std::string& filename) : | |
| 90 filename_(filename) | |
| 91 { | |
| 92 } | |
| 93 | |
| 94 const std::string& GetFilename() const | |
| 95 { | |
| 96 return filename_; | |
| 97 } | |
| 98 }; | |
| 99 | |
| 100 | |
| 101 | |
| 102 class ChunkStore | |
| 103 { | |
| 104 private: | |
| 105 typedef std::list<ChunkedFile*> Content; | |
| 106 Content content_; | |
| 107 unsigned int numPlaces_; | |
| 108 | |
| 109 boost::mutex mutex_; | |
| 110 std::set<std::string> discardedFiles_; | |
| 111 | |
| 112 void Clear() | |
| 113 { | |
| 114 for (Content::iterator it = content_.begin(); | |
| 115 it != content_.end(); it++) | |
| 116 { | |
| 117 delete *it; | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 Content::iterator Find(const std::string& filename) | |
| 122 { | |
| 123 for (Content::iterator it = content_.begin(); | |
| 124 it != content_.end(); it++) | |
| 125 { | |
| 126 if ((*it)->GetFilename() == filename) | |
| 127 { | |
| 128 return it; | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 return content_.end(); | |
| 133 } | |
| 134 | |
| 135 void Remove(const std::string& filename) | |
| 136 { | |
| 137 Content::iterator it = Find(filename); | |
| 138 if (it != content_.end()) | |
| 139 { | |
| 140 delete *it; | |
| 141 content_.erase(it); | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 public: | |
| 146 ChunkStore() | |
| 147 { | |
| 148 numPlaces_ = 10; | |
| 149 } | |
| 150 | |
| 151 ~ChunkStore() | |
| 152 { | |
| 153 Clear(); | |
| 154 } | |
| 155 | |
| 156 PostDataStatus Store(std::string& completed, | |
| 157 const char* chunkData, | |
| 158 size_t chunkSize, | |
| 159 const std::string& filename, | |
| 160 size_t filesize) | |
| 161 { | |
| 162 boost::mutex::scoped_lock lock(mutex_); | |
| 163 | |
| 164 std::set<std::string>::iterator wasDiscarded = discardedFiles_.find(filename); | |
| 165 if (wasDiscarded != discardedFiles_.end()) | |
| 166 { | |
| 167 discardedFiles_.erase(wasDiscarded); | |
| 168 return PostDataStatus_Failure; | |
| 169 } | |
| 170 | |
| 171 ChunkedFile* f; | |
| 172 Content::iterator it = Find(filename); | |
| 173 if (it == content_.end()) | |
| 174 { | |
| 175 f = new ChunkedFile(filename); | |
| 176 | |
| 177 // Make some room | |
| 178 if (content_.size() >= numPlaces_) | |
| 179 { | |
| 180 discardedFiles_.insert(content_.front()->GetFilename()); | |
| 181 delete content_.front(); | |
| 182 content_.pop_front(); | |
| 183 } | |
| 184 | |
| 185 content_.push_back(f); | |
| 186 } | |
| 187 else | |
| 188 { | |
| 189 f = *it; | |
| 190 } | |
| 191 | |
| 192 f->AddChunk(chunkData, chunkSize); | |
| 193 | |
| 194 if (f->GetNumBytes() > filesize) | |
| 195 { | |
| 196 Remove(filename); | |
| 197 } | |
| 198 else if (f->GetNumBytes() == filesize) | |
| 199 { | |
| 200 f->Flatten(completed); | |
| 201 Remove(filename); | |
| 202 return PostDataStatus_Success; | |
| 203 } | |
| 204 | |
| 205 return PostDataStatus_Pending; | |
| 206 } | |
| 207 | |
| 208 /*void Print() | |
| 209 { | |
| 210 boost::mutex::scoped_lock lock(mutex_); | |
| 211 | |
| 212 printf("ChunkStore status:\n"); | |
| 213 for (Content::const_iterator i = content_.begin(); | |
| 214 i != content_.end(); i++) | |
| 215 { | |
| 216 printf(" [%s]: %d\n", (*i)->GetFilename().c_str(), (*i)->GetNumBytes()); | |
| 217 } | |
| 218 printf("-----\n"); | |
| 219 }*/ | |
| 220 }; | |
| 221 | |
| 222 | |
| 223 struct MongooseServer::PImpl | |
| 224 { | |
| 225 struct mg_context *context_; | |
| 226 ChunkStore chunkStore_; | |
| 227 }; | |
| 228 | |
| 229 | |
| 230 ChunkStore& MongooseServer::GetChunkStore() | |
| 231 { | |
| 232 return pimpl_->chunkStore_; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 | |
| 237 HttpHandler* MongooseServer::FindHandler(const UriComponents& forUri) const | |
| 238 { | |
| 239 for (Handlers::const_iterator it = | |
| 240 handlers_.begin(); it != handlers_.end(); it++) | |
| 241 { | |
| 242 if ((*it)->IsServedUri(forUri)) | |
| 243 { | |
| 244 return *it; | |
| 245 } | |
| 246 } | |
| 247 | |
| 248 return NULL; | |
| 249 } | |
| 250 | |
| 251 | |
| 252 | |
| 253 | |
| 254 static PostDataStatus ReadPostData(std::string& postData, | |
| 255 struct mg_connection *connection, | |
| 256 const HttpHandler::Arguments& headers) | |
| 257 { | |
| 258 HttpHandler::Arguments::const_iterator cs = headers.find("content-length"); | |
| 259 if (cs == headers.end()) | |
| 260 { | |
| 261 return PostDataStatus_NoLength; | |
| 262 } | |
| 263 | |
| 264 int length; | |
| 265 try | |
| 266 { | |
| 267 length = boost::lexical_cast<int>(cs->second); | |
| 268 } | |
| 269 catch (boost::bad_lexical_cast) | |
| 270 { | |
| 271 return PostDataStatus_NoLength; | |
| 272 } | |
| 273 | |
| 274 if (length < 0) | |
| 275 { | |
| 276 length = 0; | |
| 277 } | |
| 278 | |
| 279 postData.resize(length); | |
| 280 | |
| 281 size_t pos = 0; | |
| 282 while (length > 0) | |
| 283 { | |
| 284 int r = mg_read(connection, &postData[pos], length); | |
| 285 if (r <= 0) | |
| 286 { | |
| 287 return PostDataStatus_Failure; | |
| 288 } | |
| 8 | 289 assert(r <= length); |
| 0 | 290 length -= r; |
| 291 pos += r; | |
| 292 } | |
| 293 | |
| 294 return PostDataStatus_Success; | |
| 295 } | |
| 296 | |
| 297 | |
| 298 | |
| 299 static PostDataStatus ParseMultipartPost(std::string &completedFile, | |
| 300 struct mg_connection *connection, | |
| 301 const HttpHandler::Arguments& headers, | |
| 302 const std::string& contentType, | |
| 303 ChunkStore& chunkStore) | |
| 304 { | |
| 305 std::string boundary = "--" + contentType.substr(multipartLength); | |
| 306 | |
| 307 std::string postData; | |
| 308 PostDataStatus status = ReadPostData(postData, connection, headers); | |
| 309 | |
| 310 if (status != PostDataStatus_Success) | |
| 311 { | |
| 312 return status; | |
| 313 } | |
| 314 | |
| 315 /*for (HttpHandler::Arguments::const_iterator i = headers.begin(); i != headers.end(); i++) | |
| 316 { | |
| 317 std::cout << "Header [" << i->first << "] = " << i->second << "\n"; | |
| 318 } | |
| 319 printf("CHUNK\n");*/ | |
| 320 | |
| 321 typedef HttpHandler::Arguments::const_iterator ArgumentIterator; | |
| 322 | |
| 323 ArgumentIterator requestedWith = headers.find("x-requested-with"); | |
| 324 ArgumentIterator fileName = headers.find("x-file-name"); | |
| 325 ArgumentIterator fileSizeStr = headers.find("x-file-size"); | |
| 326 | |
| 327 if (requestedWith == headers.end() || | |
| 328 requestedWith->second != "XMLHttpRequest") | |
| 329 { | |
| 330 return PostDataStatus_Failure; | |
| 331 } | |
| 332 | |
| 333 size_t fileSize = 0; | |
| 334 if (fileSizeStr != headers.end()) | |
| 335 { | |
| 336 try | |
| 337 { | |
| 338 fileSize = boost::lexical_cast<size_t>(fileSizeStr->second); | |
| 339 } | |
| 340 catch (boost::bad_lexical_cast) | |
| 341 { | |
| 342 return PostDataStatus_Failure; | |
| 343 } | |
| 344 } | |
| 345 | |
| 346 typedef boost::find_iterator<std::string::iterator> FindIterator; | |
| 10 | 347 typedef boost::iterator_range<char*> Range; |
| 0 | 348 |
| 349 //chunkStore.Print(); | |
| 350 | |
| 351 try | |
| 352 { | |
| 353 FindIterator last; | |
| 354 for (FindIterator it = | |
| 355 make_find_iterator(postData, boost::first_finder(boundary)); | |
| 356 it!=FindIterator(); | |
| 357 ++it) | |
| 358 { | |
| 359 if (last != FindIterator()) | |
| 360 { | |
| 10 | 361 Range part(&last->back(), &it->front()); |
| 0 | 362 Range content = boost::find_first(part, "\r\n\r\n"); |
| 363 if (content != Range()) | |
| 364 { | |
| 365 Range c(&content.back() + 1, &it->front() - 2); | |
| 366 size_t chunkSize = c.size(); | |
| 367 | |
| 368 if (chunkSize > 0) | |
| 369 { | |
| 370 const char* chunkData = &c.front(); | |
| 371 | |
| 372 if (fileName == headers.end()) | |
| 373 { | |
| 374 // This file is stored in a single chunk | |
| 375 completedFile.resize(chunkSize); | |
| 376 if (chunkSize > 0) | |
| 377 { | |
| 378 memcpy(&completedFile[0], chunkData, chunkSize); | |
| 379 } | |
| 380 return PostDataStatus_Success; | |
| 381 } | |
| 382 else | |
| 383 { | |
| 384 return chunkStore.Store(completedFile, chunkData, chunkSize, fileName->second, fileSize); | |
| 385 } | |
| 386 } | |
| 10 | 387 } |
| 0 | 388 } |
| 389 | |
| 390 last = it; | |
| 391 } | |
| 392 } | |
| 393 catch (std::length_error) | |
| 394 { | |
| 395 return PostDataStatus_Failure; | |
| 396 } | |
| 397 | |
| 398 return PostDataStatus_Pending; | |
| 399 } | |
| 400 | |
| 401 | |
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402 static void SendUnauthorized(HttpOutput& output) |
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403 { |
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404 std::string s = "HTTP/1.1 401 Unauthorized\r\n" |
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405 "WWW-Authenticate: Basic realm=\"" PALANTIR_REALM "\"" |
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406 "\r\n\r\n"; |
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407 output.Send(&s[0], s.size()); |
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408 } |
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409 |
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410 |
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411 static bool Authorize(const MongooseServer& that, |
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412 const HttpHandler::Arguments& headers, |
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413 HttpOutput& output) |
| 23 | 414 { |
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415 bool granted = false; |
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416 |
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417 HttpHandler::Arguments::const_iterator auth = headers.find("authorization"); |
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418 if (auth != headers.end()) |
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419 { |
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420 std::string s = auth->second; |
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421 if (s.substr(0, 6) == "Basic ") |
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422 { |
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423 std::string b64 = s.substr(6); |
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424 granted = that.IsValidBasicHttpAuthentication(b64); |
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425 } |
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426 } |
| 23 | 427 |
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428 if (!granted) |
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429 { |
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430 SendUnauthorized(output); |
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431 return false; |
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432 } |
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433 else |
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434 { |
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435 return true; |
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436 } |
| 23 | 437 } |
| 438 | |
| 439 | |
| 0 | 440 |
| 441 static void* Callback(enum mg_event event, | |
| 442 struct mg_connection *connection, | |
| 443 const struct mg_request_info *request) | |
| 444 { | |
| 445 if (event == MG_NEW_REQUEST) | |
| 446 { | |
| 447 MongooseServer* that = (MongooseServer*) (request->user_data); | |
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448 MongooseOutput output(connection); |
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449 |
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450 if (!that->IsRemoteAccessAllowed() && |
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451 request->remote_ip != LOCALHOST) |
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452 { |
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453 SendUnauthorized(output); |
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454 return (void*) ""; |
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455 } |
| 0 | 456 |
| 457 HttpHandler::Arguments arguments, headers; | |
| 458 | |
| 459 for (int i = 0; i < request->num_headers; i++) | |
| 460 { | |
| 461 std::string name = request->http_headers[i].name; | |
| 462 std::transform(name.begin(), name.end(), name.begin(), ::tolower); | |
| 463 headers.insert(std::make_pair(name, request->http_headers[i].value)); | |
| 464 } | |
| 465 | |
| 23 | 466 // Authenticate this connection |
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467 if (that->IsAuthenticationEnabled() && |
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468 !Authorize(*that, headers, output)) |
| 23 | 469 { |
| 470 return (void*) ""; | |
| 471 } | |
| 472 | |
| 0 | 473 std::string postData; |
| 474 | |
| 475 if (!strcmp(request->request_method, "GET")) | |
| 476 { | |
| 477 HttpHandler::ParseGetQuery(arguments, request->query_string); | |
| 478 } | |
| 479 else if (!strcmp(request->request_method, "POST")) | |
| 480 { | |
| 481 HttpHandler::Arguments::const_iterator ct = headers.find("content-type"); | |
| 482 if (ct == headers.end()) | |
| 483 { | |
| 43 | 484 output.SendHeader(Palantir_HttpStatus_400_BadRequest); |
| 0 | 485 return (void*) ""; |
| 486 } | |
| 487 | |
| 488 PostDataStatus status; | |
| 489 | |
| 490 std::string contentType = ct->second; | |
| 491 if (contentType.size() >= multipartLength && | |
| 492 !memcmp(contentType.c_str(), multipart, multipartLength)) | |
| 493 { | |
| 494 status = ParseMultipartPost(postData, connection, headers, contentType, that->GetChunkStore()); | |
| 495 } | |
| 496 else | |
| 497 { | |
| 498 status = ReadPostData(postData, connection, headers); | |
| 499 } | |
| 500 | |
| 501 switch (status) | |
| 502 { | |
| 503 case PostDataStatus_NoLength: | |
| 43 | 504 output.SendHeader(Palantir_HttpStatus_411_LengthRequired); |
| 0 | 505 return (void*) ""; |
| 506 | |
| 507 case PostDataStatus_Failure: | |
| 43 | 508 output.SendHeader(Palantir_HttpStatus_400_BadRequest); |
| 0 | 509 return (void*) ""; |
| 510 | |
| 511 case PostDataStatus_Pending: | |
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512 output.AnswerBuffer(""); |
| 0 | 513 return (void*) ""; |
| 514 | |
| 515 default: | |
| 516 break; | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 UriComponents uri; | |
| 521 Toolbox::SplitUriComponents(uri, request->uri); | |
| 522 | |
| 523 HttpHandler* handler = that->FindHandler(uri); | |
| 524 if (handler) | |
| 525 { | |
| 526 try | |
| 527 { | |
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528 handler->Handle(output, std::string(request->request_method), |
| 0 | 529 uri, headers, arguments, postData); |
| 530 } | |
| 531 catch (PalantirException& e) | |
| 532 { | |
| 533 std::cerr << "MongooseServer Exception [" << e.What() << "]" << std::endl; | |
| 43 | 534 output.SendHeader(Palantir_HttpStatus_500_InternalServerError); |
| 0 | 535 } |
| 536 } | |
| 537 else | |
| 538 { | |
| 43 | 539 output.SendHeader(Palantir_HttpStatus_404_NotFound); |
| 0 | 540 } |
| 541 | |
| 542 // Mark as processed | |
| 543 return (void*) ""; | |
| 544 } | |
| 545 else | |
| 546 { | |
| 547 return NULL; | |
| 548 } | |
| 549 } | |
| 550 | |
| 551 | |
| 552 bool MongooseServer::IsRunning() const | |
| 553 { | |
| 554 return (pimpl_->context_ != NULL); | |
| 555 } | |
| 556 | |
| 557 | |
| 558 MongooseServer::MongooseServer() : pimpl_(new PImpl) | |
| 559 { | |
| 560 pimpl_->context_ = NULL; | |
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561 remoteAllowed_ = false; |
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562 authentication_ = false; |
| 23 | 563 ssl_ = false; |
| 0 | 564 port_ = 8000; |
| 565 } | |
| 566 | |
| 567 | |
| 568 MongooseServer::~MongooseServer() | |
| 569 { | |
| 570 Stop(); | |
| 571 ClearHandlers(); | |
| 572 } | |
| 573 | |
| 574 | |
| 575 void MongooseServer::SetPort(uint16_t port) | |
| 576 { | |
| 577 Stop(); | |
| 578 port_ = port; | |
| 579 } | |
| 580 | |
| 581 void MongooseServer::Start() | |
| 582 { | |
| 583 if (!IsRunning()) | |
| 584 { | |
| 585 std::string port = boost::lexical_cast<std::string>(port_); | |
| 586 | |
| 23 | 587 if (ssl_) |
| 588 { | |
| 589 port += "s"; | |
| 590 } | |
| 591 | |
| 0 | 592 const char *options[] = { |
| 593 "listening_ports", port.c_str(), | |
| 23 | 594 ssl_ ? "ssl_certificate" : NULL, |
| 595 certificate_.c_str(), | |
| 0 | 596 NULL |
| 597 }; | |
| 598 | |
| 599 pimpl_->context_ = mg_start(&Callback, this, options); | |
| 600 if (!pimpl_->context_) | |
| 601 { | |
| 602 throw PalantirException("Unable to launch the Mongoose server"); | |
| 603 } | |
| 604 } | |
| 605 } | |
| 606 | |
| 607 void MongooseServer::Stop() | |
| 608 { | |
| 609 if (IsRunning()) | |
| 610 { | |
| 611 mg_stop(pimpl_->context_); | |
| 612 pimpl_->context_ = NULL; | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 | |
| 617 void MongooseServer::RegisterHandler(HttpHandler* handler) | |
| 618 { | |
| 619 Stop(); | |
| 620 | |
| 621 handlers_.push_back(handler); | |
| 622 } | |
| 623 | |
| 624 | |
| 625 void MongooseServer::ClearHandlers() | |
| 626 { | |
| 627 Stop(); | |
| 628 | |
| 629 for (Handlers::iterator it = | |
| 630 handlers_.begin(); it != handlers_.end(); it++) | |
| 631 { | |
| 632 delete *it; | |
| 633 } | |
| 634 } | |
| 635 | |
| 23 | 636 |
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637 void MongooseServer::ClearUsers() |
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638 { |
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639 Stop(); |
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640 registeredUsers_.clear(); |
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641 } |
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642 |
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643 |
| 23 | 644 void MongooseServer::RegisterUser(const char* username, |
| 645 const char* password) | |
| 646 { | |
| 647 Stop(); | |
| 24 | 648 |
| 649 std::string tag = std::string(username) + ":" + std::string(password); | |
| 650 registeredUsers_.insert(Toolbox::EncodeBase64(tag)); | |
| 23 | 651 } |
| 652 | |
| 653 void MongooseServer::SetSslEnabled(bool enabled) | |
| 654 { | |
| 655 Stop(); | |
| 656 | |
| 657 #if PALANTIR_SSL_ENABLED == 0 | |
| 658 if (enabled) | |
| 659 { | |
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660 throw PalantirException("Palantir has been built without SSL support"); |
| 23 | 661 } |
| 662 else | |
| 663 { | |
| 664 ssl_ = false; | |
| 665 } | |
| 666 #else | |
| 667 ssl_ = enabled; | |
| 668 #endif | |
| 669 } | |
| 670 | |
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671 void MongooseServer::SetAuthenticationEnabled(bool enabled) |
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672 { |
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673 Stop(); |
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674 authentication_ = enabled; |
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675 } |
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676 |
| 23 | 677 void MongooseServer::SetSslCertificate(const char* path) |
| 678 { | |
| 679 Stop(); | |
| 680 certificate_ = path; | |
| 681 } | |
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682 |
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683 void MongooseServer::SetRemoteAccessAllowed(bool allowed) |
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684 { |
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685 Stop(); |
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686 remoteAllowed_ = allowed; |
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687 } |
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688 |
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689 |
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690 bool MongooseServer::IsValidBasicHttpAuthentication(const std::string& basic) const |
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691 { |
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692 return registeredUsers_.find(basic) != registeredUsers_.end(); |
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693 } |
| 0 | 694 } |