source/carddav/carddav-serveretag.cpp

   1 // carddav-serveretag.cpp - CardDAV Object - Server ETag subroutines.
   2 //
   3 // (c) 2012-2015 Xestia Software Development.
   4 //
   5 // This file is part of Xestia Address Book.
   6 //
   7 // Xestia Address Book is free software: you can redistribute it and/or modify
   8 // it under the terms of the GNU General Public License as published by the
   9 // Free Software Foundation, version 3 of the license.
  10 //
  11 // Xestia Address Book is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with Xestia Address Book. If not, see <http://www.gnu.org/licenses/>
  18
  19 #include "carddav.h"
  20 #include "../version.h"
  21 #include <wx/wx.h>
  22 #include <wx/tokenzr.h>
  23 #include <wx/ffile.h>
  24 #include <libxml/parser.h>
  25 #include <libxml/tree.h>
  26 #include <map>
  27 #include <thread>
  28 #include "../vcard/vcard.h"
  29 #include "../common/dirs.h"
  30
  31 void CardDAV::GetServerETagValueThread()
  32 {
  33
  34         // Get the server etag value (threaded).
  35
  36         PageData.Clear();
  37         PageHeader.Clear();
  38
  39         SSLStatus = TRUE;
  40         AuthPassed = TRUE;
  41         AbortConnection = FALSE;
  42
  43         bool FilenameIsDirectory = FALSE;
  44         CURL *conn;
  45         CURLcode conncode;
  46         wxString ServerAddressURL;
  47         wxString ServerAuth;
  48         wxString ServerAddressSSL;
  49         wxString ServerAddressNormal;
  50
  51         conn = curl_easy_init();
  52
  53 #if defined(__APPLE__)
  54
  55         SetConnectionObject(conn);
  56
  57 #endif
  58
  59         struct CardDAVCURLPasser {
  60
  61                 CardDAV *Data;
  62                 bool HeaderMode = TRUE;
  63
  64         } CardDAVHeader, CardDAVFooter;
  65
  66         CardDAVHeader.Data = this;
  67         CardDAVHeader.HeaderMode = TRUE;
  68
  69         CardDAVFooter.Data = this;
  70         CardDAVFooter.HeaderMode = FALSE;
  71
  72         wxString Data1;
  73         wxString Data2;
  74
  75         ServerAddressURL = ServerAddress + wxT(":") + wxString::Format(wxT("%i"), ServerPort) + ServerPrefix + ServerFilenameLocation;
  76         ServerAddressSSL = wxT("https://") + ServerAddressURL;
  77         ServerAddressNormal = wxT("http://") + ServerAddressURL;
  78
  79         ServerAuth = ServerUser + wxT(":") + ServerPass;
  80
  81         std::map<int,int>::iterator ActIter;
  82         struct UploadDataStruc UploadData;
  83
  84
  85         ActIter = ActivityListPtr->find((int)ItemIndex);
  86
  87         static const char* query =
  88         "<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
  89         "<C:addressbook-query xmlns:D=\"DAV:\""
  90         "       xmlns:C=\"urn:ietf:params:xml:ns:carddav\">"
  91         "<D:prop><D:getetag/>"
  92         "</D:prop>"
  93         "<C:filter/>"
  94         "</C:addressbook-query>";
  95
  96         if (ServerSSL){
  97
  98                 wxString ServerCertFilename;
  99                 bool MatchingCert = FALSE;
 100
 101                 curl_easy_setopt(conn, CURLOPT_URL, (const char*)ServerAddressSSL.mb_str(wxConvUTF8));
 102                 curl_easy_setopt(conn, CURLOPT_NOPROGRESS, 0);
 103                 curl_easy_setopt(conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 104                 curl_easy_setopt(conn, CURLOPT_TIMEOUT, 60);
 105                 curl_easy_setopt(conn, CURLOPT_FAILONERROR, TRUE);
 106                 curl_easy_setopt(conn, CURLOPT_USERAGENT, XSDAB_USERAGENT);
 107                 curl_easy_setopt(conn, CURLOPT_USERPWD, (const char*)ServerAuth.mb_str(wxConvUTF8));
 108                 curl_easy_setopt(conn, CURLOPT_WRITEFUNCTION, WritebackFunc);
 109                 curl_easy_setopt(conn, CURLOPT_WRITEDATA, &PageData);
 110                 curl_easy_setopt(conn, CURLOPT_WRITEHEADER, &PageHeader);
 111                 curl_easy_setopt(conn, CURLOPT_PROGRESSDATA, this);
 112                 curl_easy_setopt(conn, CURLOPT_PROGRESSFUNCTION, ProgressFunc);
 113                 curl_easy_setopt(conn, CURLOPT_CUSTOMREQUEST, "REPORT");
 114                 curl_easy_setopt(conn, CURLOPT_NOSIGNAL, 1);
 115                 curl_easy_setopt(conn, CURLOPT_POSTFIELDS, query);
 116                 curl_easy_setopt(conn, CURLOPT_POSTFIELDSIZE, strlen(query));
 117
 118 #if defined(__APPLE__) || defined(__WIN32__)
 119
 120 #else
 121
 122                 ServerCertFilename = GetAccountDir(ServerAccount, TRUE);
 123
 124                 if (wxFile::Exists(ServerCertFilename) == TRUE){
 125
 126                         curl_easy_setopt(conn, CURLOPT_SSL_VERIFYPEER, 1);
 127                         curl_easy_setopt(conn, CURLOPT_SSL_VERIFYHOST, 2);
 128                         curl_easy_setopt(conn, CURLOPT_CAINFO, (const char*)ServerCertFilename.mb_str(wxConvUTF8));
 129
 130                 }
 131
 132 #endif
 133
 134                 claconncode = (curl_easy_perform(conn));
 135
 136                 // If CURLE_PEER_FAILED_VERIFICATION is returned, retry without
 137                 // the local certificate in use.
 138
 139                 if (claconncode == CURLE_PEER_FAILED_VERIFICATION){
 140
 141                         curl_easy_cleanup(conn);
 142                         conn = curl_easy_init();
 143
 144                         curl_easy_setopt(conn, CURLOPT_URL, (const char*)ServerAddressSSL.mb_str(wxConvUTF8));
 145                         curl_easy_setopt(conn, CURLOPT_NOPROGRESS, 0);
 146                         curl_easy_setopt(conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 147                         curl_easy_setopt(conn, CURLOPT_TIMEOUT, 60);
 148                         curl_easy_setopt(conn, CURLOPT_FAILONERROR, TRUE);
 149                         curl_easy_setopt(conn, CURLOPT_USERAGENT, XSDAB_USERAGENT);
 150                         curl_easy_setopt(conn, CURLOPT_USERPWD, (const char*)ServerAuth.mb_str(wxConvUTF8));
 151                         curl_easy_setopt(conn, CURLOPT_WRITEFUNCTION, WritebackFunc);
 152                         curl_easy_setopt(conn, CURLOPT_WRITEDATA, &PageData);
 153                         curl_easy_setopt(conn, CURLOPT_WRITEHEADER, &PageHeader);
 154                         curl_easy_setopt(conn, CURLOPT_PROGRESSDATA, this);
 155                         curl_easy_setopt(conn, CURLOPT_PROGRESSFUNCTION, ProgressFunc);
 156                         curl_easy_setopt(conn, CURLOPT_CUSTOMREQUEST, "REPORT");
 157                         curl_easy_setopt(conn, CURLOPT_NOSIGNAL, 1);
 158                         curl_easy_setopt(conn, CURLOPT_POSTFIELDS, query);
 159                         curl_easy_setopt(conn, CURLOPT_POSTFIELDSIZE, strlen(query));
 160
 161                         claconncode = (curl_easy_perform(conn));
 162
 163                         // If claconncode is CURLE_OK then delete the certificate file as that
 164                         // is no longer needed.
 165
 166                         if (claconncode == CURLE_OK){
 167
 168                                 // Delete the certificate file.
 169
 170                                 wxRemoveFile(ServerCertFilename);
 171
 172                         }
 173
 174                 }
 175
 176                 // Check if it fails with a CURLE_SSL_CACERT then compare
 177                 // the certificates as PEM files.
 178
 179 #if defined(__APPLE__)
 180
 181 #else
 182
 183                 if (claconncode == CURLE_SSL_CACERT && wxFile::Exists(ServerCertFilename) == TRUE){
 184
 185                         CURL *sslerrconn;
 186                         sslerrconn = curl_easy_init();
 187                         CURLcode sslerrconncode;
 188
 189                         wxString ServerAddressOnly = wxT("https://") + ServerAddress + wxT(":") + wxString::Format(wxT("%i"), ServerPort) + wxT("/");
 190
 191                         PageData.clear();
 192                         PageHeader.clear();
 193
 194                         curl_easy_setopt(sslerrconn, CURLOPT_URL, (const char*)ServerAddressOnly.mb_str(wxConvUTF8));
 195                         curl_easy_setopt(sslerrconn, CURLOPT_NOPROGRESS, 0);
 196                         curl_easy_setopt(sslerrconn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 197                         curl_easy_setopt(sslerrconn, CURLOPT_TIMEOUT, 60);
 198                         curl_easy_setopt(sslerrconn, CURLOPT_FAILONERROR, TRUE);
 199                         curl_easy_setopt(sslerrconn, CURLOPT_USERAGENT, XSDAB_USERAGENT);
 200                         curl_easy_setopt(sslerrconn, CURLOPT_WRITEFUNCTION, WritebackFunc);
 201                         curl_easy_setopt(sslerrconn, CURLOPT_WRITEDATA, &PageData);
 202                         curl_easy_setopt(sslerrconn, CURLOPT_WRITEHEADER, &PageHeader);
 203                         curl_easy_setopt(sslerrconn, CURLOPT_PROGRESSDATA, this);
 204                         curl_easy_setopt(sslerrconn, CURLOPT_PROGRESSFUNCTION, ProgressFunc);
 205                         curl_easy_setopt(sslerrconn, CURLOPT_NOSIGNAL, 1);
 206                         curl_easy_setopt(sslerrconn, CURLOPT_SSL_VERIFYPEER, 0);
 207                         curl_easy_setopt(sslerrconn, CURLOPT_CERTINFO, 1);
 208                         curl_easy_setopt(sslerrconn, CURLOPT_SSL_VERIFYPEER, 1);
 209                         curl_easy_setopt(sslerrconn, CURLOPT_SSL_VERIFYHOST, 2);
 210                         curl_easy_setopt(sslerrconn, CURLOPT_CAINFO, (const char*)ServerCertFilename.mb_str(wxConvUTF8));
 211
 212                         wxString SSLLocalData;
 213                         wxString SSLServerData;
 214
 215                         sslerrconncode = (curl_easy_perform(sslerrconn));
 216
 217                         SSLCertCol = BuildSSLCollection(sslerrconn);
 218                         std::map<int, SSLCertData>::iterator SSLCDIter = SSLCertCol.SSLCollection.find(0);
 219                         std::multimap<wxString,wxString>::iterator SSLDataIter = SSLCDIter->second.CertData.find(wxT("Cert"));
 220
 221                         wxFFile SSLLocalFile;
 222
 223 #if wxABI_VERSION < 20900
 224                         SSLLocalFile.Open(ServerCertFilename.c_str(), wxT("r"));
 225 #else
 226                         SSLLocalFile.Open(ServerCertFilename, wxT("r"));
 227 #endif
 228
 229                         // Load the recovery database for tasks not done.
 230
 231                         if (SSLLocalFile.IsOpened() == TRUE){
 232
 233                         // Check if we are using wxWidgets version 2.8 or less and
 234                         // execute the required command accordingly.
 235
 236                                 SSLLocalFile.ReadAll(&SSLLocalData, wxConvAuto());
 237
 238
 239                         }
 240
 241                         SSLServerData = SSLDataIter->second;
 242
 243                         if (SSLLocalData == SSLServerData){
 244
 245                                 // Server key matches with local key so retry with CURLOPT_SSL_VERIFYPEER
 246                                 // and CURLOPT_SSL_VERIFYHOST off.
 247
 248                                 curl_easy_cleanup(conn);
 249                                 conn = curl_easy_init();
 250
 251                                 PageData.clear();
 252                                 PageHeader.clear();
 253
 254                                 curl_easy_setopt(conn, CURLOPT_URL, (const char*)ServerAddressSSL.mb_str(wxConvUTF8));
 255                                 curl_easy_setopt(conn, CURLOPT_NOPROGRESS, 0);
 256                                 curl_easy_setopt(conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 257                                 curl_easy_setopt(conn, CURLOPT_TIMEOUT, 60);
 258                                 curl_easy_setopt(conn, CURLOPT_FAILONERROR, TRUE);
 259                                 curl_easy_setopt(conn, CURLOPT_USERAGENT, XSDAB_USERAGENT);
 260                                 curl_easy_setopt(conn, CURLOPT_USERPWD, (const char*)ServerAuth.mb_str(wxConvUTF8));
 261                                 curl_easy_setopt(conn, CURLOPT_WRITEFUNCTION, WritebackFunc);
 262                                 curl_easy_setopt(conn, CURLOPT_WRITEDATA, &PageData);
 263                                 curl_easy_setopt(conn, CURLOPT_WRITEHEADER, &PageHeader);
 264                                 curl_easy_setopt(conn, CURLOPT_PROGRESSDATA, this);
 265                                 curl_easy_setopt(conn, CURLOPT_PROGRESSFUNCTION, ProgressFunc);
 266                                 curl_easy_setopt(conn, CURLOPT_CUSTOMREQUEST, "REPORT");
 267                                 curl_easy_setopt(conn, CURLOPT_NOSIGNAL, 1);
 268                                 curl_easy_setopt(conn, CURLOPT_POSTFIELDS, query);
 269                                 curl_easy_setopt(conn, CURLOPT_POSTFIELDSIZE, strlen(query));
 270                                 curl_easy_setopt(conn, CURLOPT_SSL_VERIFYPEER, 0);
 271                                 curl_easy_setopt(conn, CURLOPT_SSL_VERIFYHOST, 0);
 272
 273                                 claconncode = (curl_easy_perform(conn));
 274
 275                                 MatchingCert = TRUE;
 276
 277                         }
 278
 279                         if (MatchingCert == FALSE){
 280
 281                                 claconncode = CURLE_SSL_CACERT;
 282                                 return;
 283
 284                         }
 285
 286                         curl_easy_cleanup(sslerrconn);
 287
 288                 }
 289
 290 #endif
 291
 292                 // Sort out SSL error.
 293
 294                 // When SSL cert error occurs, connect again and fetch certificates.
 295                 // Display a message to the user explaining that an invalid
 296                 // certificate has been given and let the user decide what
 297                 // to do next.
 298
 299                 if (claconncode == CURLE_OK){
 300
 301                 } else if (claconncode == CURLE_SSL_CACERT || claconncode == CURLE_PEER_FAILED_VERIFICATION){
 302
 303                         CURL *sslerrconn;
 304                         sslerrconn = curl_easy_init();
 305                         CURLcode sslerrconncode;
 306
 307                         wxString ServerAddressOnly = wxT("https://") + ServerAddress + wxT(":") + wxString::Format(wxT("%i"), ServerPort) + wxT("/");
 308
 309                         // Replace conn with sslerrconn!
 310
 311                         curl_easy_setopt(sslerrconn, CURLOPT_URL, (const char*)ServerAddressOnly.mb_str(wxConvUTF8));
 312                         curl_easy_setopt(sslerrconn, CURLOPT_NOPROGRESS, 0);
 313                         curl_easy_setopt(sslerrconn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 314                         curl_easy_setopt(sslerrconn, CURLOPT_TIMEOUT, 60);
 315                         curl_easy_setopt(sslerrconn, CURLOPT_FAILONERROR, TRUE);
 316                         curl_easy_setopt(sslerrconn, CURLOPT_USERAGENT, XSDAB_USERAGENT);
 317                         curl_easy_setopt(sslerrconn, CURLOPT_WRITEFUNCTION, WritebackFunc);
 318                         curl_easy_setopt(sslerrconn, CURLOPT_WRITEDATA, &PageData);
 319                         curl_easy_setopt(sslerrconn, CURLOPT_WRITEHEADER, &PageHeader);
 320                         curl_easy_setopt(sslerrconn, CURLOPT_PROGRESSDATA, this);
 321                         curl_easy_setopt(sslerrconn, CURLOPT_PROGRESSFUNCTION, ProgressFunc);
 322                         curl_easy_setopt(sslerrconn, CURLOPT_NOSIGNAL, 1);
 323                         curl_easy_setopt(sslerrconn, CURLOPT_SSL_VERIFYPEER, 0);
 324                         curl_easy_setopt(sslerrconn, CURLOPT_CERTINFO, 1);
 325
 326                         sslerrconncode = (curl_easy_perform(sslerrconn));
 327
 328 #if defined(__APPLE__)
 329
 330                         SetConnectionObject(sslerrconn);
 331
 332 #endif
 333
 334                         SSLCertCol = BuildSSLCollection(sslerrconn);
 335                         SSLCertCol.SuccessCode = 1;
 336
 337                         curl_easy_cleanup(conn);
 338                         curl_easy_cleanup(sslerrconn);
 339
 340                         return;
 341
 342                 } else if (claconncode == CURLE_HTTP_RETURNED_ERROR){
 343
 344                         fprintf(stderr, "GetServerETagValueThread(): curl_easy_perform() failed: %s\n",
 345                                         curl_easy_strerror(claconncode));
 346                         int http_code = 0;
 347                         curl_easy_getinfo(conn, CURLINFO_RESPONSE_CODE, &http_code);
 348                         fprintf(stderr, "Error code was: %d\n", http_code);
 349
 350                         curl_easy_cleanup(conn);
 351
 352                         return;
 353
 354                 } else {
 355
 356                         fprintf(stderr, "GetServerETagValueThread(): curl_easy_perform() failed: %s\n",
 357                                         curl_easy_strerror(claconncode));
 358                         int http_code = 0;
 359                         curl_easy_getinfo(conn, CURLINFO_RESPONSE_CODE, &http_code);
 360                         fprintf(stderr, "Error code was: %d\n", http_code);
 361
 362                         curl_easy_cleanup(conn);
 363
 364                         return;
 365
 366                 }
 367
 368         } else {
 369
 370                 // No SSL.
 371
 372                 wxString EmptyString;
 373
 374                 curl_easy_setopt(conn, CURLOPT_URL, (const char*)ServerAddressNormal.mb_str(wxConvUTF8));
 375                 curl_easy_setopt(conn, CURLOPT_NOPROGRESS, 0);
 376                 curl_easy_setopt(conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 377                 curl_easy_setopt(conn, CURLOPT_TIMEOUT, 60);
 378                 curl_easy_setopt(conn, CURLOPT_FAILONERROR, TRUE);
 379                 curl_easy_setopt(conn, CURLOPT_USERAGENT, XSDAB_USERAGENT);
 380                 curl_easy_setopt(conn, CURLOPT_USERPWD, (const char*)ServerAuth.mb_str(wxConvUTF8));
 381                 curl_easy_setopt(conn, CURLOPT_WRITEFUNCTION, WritebackFunc);
 382                 curl_easy_setopt(conn, CURLOPT_WRITEDATA, &PageData);
 383                 curl_easy_setopt(conn, CURLOPT_WRITEHEADER, &PageHeader);
 384                 curl_easy_setopt(conn, CURLOPT_PROGRESSDATA, this);
 385                 curl_easy_setopt(conn, CURLOPT_PROGRESSFUNCTION, ProgressFunc);
 386                 curl_easy_setopt(conn, CURLOPT_CUSTOMREQUEST, "REPORT");
 387                 curl_easy_setopt(conn, CURLOPT_NOSIGNAL, 1);
 388                 curl_easy_setopt(conn, CURLOPT_POSTFIELDS, query);
 389                 curl_easy_setopt(conn, CURLOPT_POSTFIELDSIZE, strlen(query));
 390
 391                 PageData.Clear();
 392                 PageHeader.Clear();
 393
 394                 conncode = (curl_easy_perform(conn));
 395
 396                 if (conncode == CURLE_OK){
 397
 398                 } else if (conncode == CURLE_HTTP_RETURNED_ERROR){
 399
 400                         fprintf(stderr, "curl_easy_perform() failed: %s\n",
 401                                         curl_easy_strerror(conncode));
 402
 403                         return;
 404
 405                 } else {
 406
 407                         fprintf(stderr, "curl_easy_perform() failed: %s\n",
 408                                         curl_easy_strerror(conncode));
 409
 410                         return;
 411
 412                 }
 413
 414         }
 415
 416         xmlDocPtr xmlCardDAVDoc;
 417
 418         xmlCardDAVDoc = xmlReadMemory(PageData.mb_str(wxConvUTF8), (int)PageData.Len(), "noname.xml", NULL, 0);
 419
 420         xmlNodePtr nodeLevel1;
 421         xmlNodePtr nodeLevel2;
 422         xmlNodePtr nodeLevel3;
 423         xmlNodePtr nodeLevel4;
 424         xmlNodePtr nodeLevel5;
 425         xmlNodePtr nodeLevel6;
 426
 427         std::map<wxString,wxString> xmlDataMap;
 428
 429         wxString DataFilename;
 430         wxString ETagData;
 431
 432         std::string xmlStringSafe;
 433
 434         // Tranverse through the catacombs of the response to get our ETag for the file.
 435
 436         for (nodeLevel1 = xmlCardDAVDoc->children;
 437                 nodeLevel1 != NULL;
 438                 nodeLevel1 = nodeLevel1->next)
 439         {
 440
 441                 bool HREFFound = FALSE;
 442                 bool ETagFound = FALSE;
 443
 444                 for (nodeLevel2 = nodeLevel1->children;
 445                         nodeLevel2 != NULL;
 446                         nodeLevel2 = nodeLevel2->next)
 447                 {
 448
 449                         for (nodeLevel3 = nodeLevel2->children;
 450                         nodeLevel3 != NULL;
 451                         nodeLevel3 = nodeLevel3->next)
 452                         {
 453
 454                                 if (!xmlStrcmp(nodeLevel3->name, (const xmlChar *)"href") ||
 455                                 !xmlStrcmp(nodeLevel3->name, (const xmlChar *)"d:href") ||
 456                                 !xmlStrcmp(nodeLevel3->name, (const xmlChar *)"D:href")
 457                                 ){
 458
 459                                         // Get the filename.
 460
 461                                         for (nodeLevel4 = nodeLevel3->children;
 462                                         nodeLevel4 != NULL;
 463                                         nodeLevel4 = nodeLevel4->next)
 464                                         {
 465
 466                                                 if (!xmlStrcmp(nodeLevel4->name, (const xmlChar *)"text") ||
 467                                                 !xmlStrcmp(nodeLevel4->name, (const xmlChar *)"d:text") ||
 468                                                 !xmlStrcmp(nodeLevel4->name, (const xmlChar *)"D:text")
 469                                                 ){
 470
 471                                                         DataFilename = wxString::FromUTF8((const char*)nodeLevel4->content);
 472                                                         wxStringTokenizer wSTDFilename(DataFilename, wxT("/"));
 473
 474                                                         while (wSTDFilename.HasMoreTokens()){
 475
 476                                                                 DataFilename = wSTDFilename.GetNextToken();
 477
 478                                                         }
 479
 480                                                         HREFFound = TRUE;
 481
 482                                                 }
 483
 484
 485
 486                                         }
 487
 488                                 } else {
 489
 490                                         for (nodeLevel4 = nodeLevel3->children;
 491                                         nodeLevel4 != NULL;
 492                                         nodeLevel4 = nodeLevel4->next)
 493                                         {
 494
 495                                                         for (nodeLevel5 = nodeLevel4->children;
 496                                                         nodeLevel5 != NULL;
 497                                                         nodeLevel5 = nodeLevel5->next)
 498                                                         {
 499
 500                                                                 if (!xmlStrcmp(nodeLevel5->name, (const xmlChar *)"getetag") ||
 501                                                                 !xmlStrcmp(nodeLevel5->name, (const xmlChar *)"d:getetag") ||
 502                                                                 !xmlStrcmp(nodeLevel5->name, (const xmlChar *)"D:getetag")
 503                                                                 ){
 504
 505                                                                         for (nodeLevel6 = nodeLevel5->children;
 506                                                                         nodeLevel6 != NULL;
 507                                                                         nodeLevel6 = nodeLevel6->next)
 508                                                                         {
 509
 510                                                                                 // Strip the quotes from the ETag.
 511
 512                                                                                 ETagData = wxString::FromUTF8((const char*)nodeLevel6->content);
 513                                                                                 if (ETagData.Mid(0, 1) == wxT("\"") && ETagData.Mid((ETagData.Len() - 1), 1) == wxT("\"")){
 514
 515                                                                                         ETagData.Remove(0, 1);
 516                                                                                         ETagData.RemoveLast();
 517
 518                                                                                 }
 519
 520                                                                                 ETagFound = TRUE;
 521
 522                                                                         }
 523
 524                                                                 }
 525
 526                                                         }
 527
 528                                         }
 529
 530                                 }
 531
 532                         }
 533
 534                 }
 535
 536                 if (HREFFound == TRUE && ETagFound == TRUE){
 537
 538                         // Add to the map data.
 539
 540                         xmlDataMap.insert(std::make_pair(DataFilename, ETagData));
 541
 542                         HREFFound = FALSE;
 543                         ETagFound = FALSE;
 544
 545                 }
 546
 547
 548         }
 549
 550         xmlFreeDoc(xmlCardDAVDoc);
 551
 552         // Get the first result.
 553
 554         for (std::map<wxString,wxString>::iterator iter = xmlDataMap.begin();
 555                 iter != xmlDataMap.end(); ++iter){
 556
 557                 ETagResult = iter->second;
 558                 break;
 559
 560         }
 561
 562         if (ETagResult.IsEmpty()){
 563
 564                 return;
 565
 566         }
 567
 568         return;
 569
 570 }
 571
 572 void CardDAV::GetServerETagValue(){
 573
 574         // Get the server etag value.
 575
 576         std::thread ConnectThread(&CardDAV::GetServerETagValueThread, this);
 577         ConnectThread.detach();
 578
 579 }