chrome/utility/importer/firefox_importer.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/utility/importer/firefox_importer.h"
   6
   7 #include <set>
   8
   9 #include "base/files/file_enumerator.h"
  10 #include "base/files/file_util.h"
  11 #include "base/json/json_file_value_serializer.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "base/stl_util.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "chrome/common/importer/firefox_importer_utils.h"
  18 #include "chrome/common/importer/imported_bookmark_entry.h"
  19 #include "chrome/common/importer/importer_autofill_form_data_entry.h"
  20 #include "chrome/common/importer/importer_bridge.h"
  21 #include "chrome/common/importer/importer_url_row.h"
  22 #include "chrome/grit/generated_resources.h"
  23 #include "chrome/utility/importer/bookmark_html_reader.h"
  24 #include "chrome/utility/importer/favicon_reencode.h"
  25 #include "chrome/utility/importer/nss_decryptor.h"
  26 #include "components/autofill/core/common/password_form.h"
  27 #include "sql/connection.h"
  28 #include "sql/statement.h"
  29 #include "url/gurl.h"
  30
  31 namespace {
  32
  33 // Original definition is in http://mxr.mozilla.org/firefox/source/toolkit/
  34 //  components/places/public/nsINavBookmarksService.idl
  35 enum BookmarkItemType {
  36   TYPE_BOOKMARK = 1,
  37   TYPE_FOLDER = 2,
  38   TYPE_SEPARATOR = 3,
  39   TYPE_DYNAMIC_CONTAINER = 4
  40 };
  41
  42 // Loads the default bookmarks in the Firefox installed at |app_path|,
  43 // and stores their locations in |urls|.
  44 void LoadDefaultBookmarks(const base::FilePath& app_path,
  45                           std::set<GURL>* urls) {
  46   base::FilePath file = app_path.AppendASCII("defaults")
  47       .AppendASCII("profile")
  48       .AppendASCII("bookmarks.html");
  49   urls->clear();
  50
  51   std::vector<ImportedBookmarkEntry> bookmarks;
  52   std::vector<importer::SearchEngineInfo> search_engines;
  53   bookmark_html_reader::ImportBookmarksFile(base::Callback<bool(void)>(),
  54                                             base::Callback<bool(const GURL&)>(),
  55                                             file,
  56                                             &bookmarks,
  57                                             &search_engines,
  58                                             NULL);
  59   for (size_t i = 0; i < bookmarks.size(); ++i)
  60     urls->insert(bookmarks[i].url);
  61 }
  62
  63 // Returns true if |url| has a valid scheme that we allow to import. We
  64 // filter out the URL with a unsupported scheme.
  65 bool CanImportURL(const GURL& url) {
  66   // The URL is not valid.
  67   if (!url.is_valid())
  68     return false;
  69
  70   // Filter out the URLs with unsupported schemes.
  71   const char* const kInvalidSchemes[] = {"wyciwyg", "place", "about", "chrome"};
  72   for (size_t i = 0; i < arraysize(kInvalidSchemes); ++i) {
  73     if (url.SchemeIs(kInvalidSchemes[i]))
  74       return false;
  75   }
  76
  77   return true;
  78 }
  79
  80 }  // namespace
  81
  82 struct FirefoxImporter::BookmarkItem {
  83   int parent;
  84   int id;
  85   GURL url;
  86   base::string16 title;
  87   BookmarkItemType type;
  88   std::string keyword;
  89   base::Time date_added;
  90   int64 favicon;
  91   bool empty_folder;
  92 };
  93
  94 FirefoxImporter::FirefoxImporter() {
  95 }
  96
  97 FirefoxImporter::~FirefoxImporter() {
  98 }
  99
 100 void FirefoxImporter::StartImport(
 101     const importer::SourceProfile& source_profile,
 102     uint16 items,
 103     ImporterBridge* bridge) {
 104   bridge_ = bridge;
 105   source_path_ = source_profile.source_path;
 106   app_path_ = source_profile.app_path;
 107
 108 #if defined(OS_POSIX)
 109   locale_ = source_profile.locale;
 110 #endif
 111
 112   // The order here is important!
 113   bridge_->NotifyStarted();
 114   if ((items & importer::HOME_PAGE) && !cancelled()) {
 115     bridge_->NotifyItemStarted(importer::HOME_PAGE);
 116     ImportHomepage();  // Doesn't have a UI item.
 117     bridge_->NotifyItemEnded(importer::HOME_PAGE);
 118   }
 119
 120   // Note history should be imported before bookmarks because bookmark import
 121   // will also import favicons and we store favicon for a URL only if the URL
 122   // exist in history or bookmarks.
 123   if ((items & importer::HISTORY) && !cancelled()) {
 124     bridge_->NotifyItemStarted(importer::HISTORY);
 125     ImportHistory();
 126     bridge_->NotifyItemEnded(importer::HISTORY);
 127   }
 128
 129   if ((items & importer::FAVORITES) && !cancelled()) {
 130     bridge_->NotifyItemStarted(importer::FAVORITES);
 131     ImportBookmarks();
 132     bridge_->NotifyItemEnded(importer::FAVORITES);
 133   }
 134   if ((items & importer::SEARCH_ENGINES) && !cancelled()) {
 135     bridge_->NotifyItemStarted(importer::SEARCH_ENGINES);
 136     ImportSearchEngines();
 137     bridge_->NotifyItemEnded(importer::SEARCH_ENGINES);
 138   }
 139   if ((items & importer::PASSWORDS) && !cancelled()) {
 140     bridge_->NotifyItemStarted(importer::PASSWORDS);
 141     ImportPasswords();
 142     bridge_->NotifyItemEnded(importer::PASSWORDS);
 143   }
 144   if ((items & importer::AUTOFILL_FORM_DATA) && !cancelled()) {
 145     bridge_->NotifyItemStarted(importer::AUTOFILL_FORM_DATA);
 146     ImportAutofillFormData();
 147     bridge_->NotifyItemEnded(importer::AUTOFILL_FORM_DATA);
 148   }
 149   bridge_->NotifyEnded();
 150 }
 151
 152 void FirefoxImporter::ImportHistory() {
 153   base::FilePath file = source_path_.AppendASCII("places.sqlite");
 154   if (!base::PathExists(file))
 155     return;
 156
 157   sql::Connection db;
 158   if (!db.Open(file))
 159     return;
 160
 161   // |visit_type| represent the transition type of URLs (typed, click,
 162   // redirect, bookmark, etc.) We eliminate some URLs like sub-frames and
 163   // redirects, since we don't want them to appear in history.
 164   // Firefox transition types are defined in:
 165   //   toolkit/components/places/public/nsINavHistoryService.idl
 166   const char query[] =
 167       "SELECT h.url, h.title, h.visit_count, "
 168       "h.hidden, h.typed, v.visit_date "
 169       "FROM moz_places h JOIN moz_historyvisits v "
 170       "ON h.id = v.place_id "
 171       "WHERE v.visit_type <= 3";
 172
 173   sql::Statement s(db.GetUniqueStatement(query));
 174
 175   std::vector<ImporterURLRow> rows;
 176   while (s.Step() && !cancelled()) {
 177     GURL url(s.ColumnString(0));
 178
 179     // Filter out unwanted URLs.
 180     if (!CanImportURL(url))
 181       continue;
 182
 183     ImporterURLRow row(url);
 184     row.title = s.ColumnString16(1);
 185     row.visit_count = s.ColumnInt(2);
 186     row.hidden = s.ColumnInt(3) == 1;
 187     row.typed_count = s.ColumnInt(4);
 188     row.last_visit = base::Time::FromTimeT(s.ColumnInt64(5)/1000000);
 189
 190     rows.push_back(row);
 191   }
 192
 193   if (!rows.empty() && !cancelled())
 194     bridge_->SetHistoryItems(rows, importer::VISIT_SOURCE_FIREFOX_IMPORTED);
 195 }
 196
 197 void FirefoxImporter::ImportBookmarks() {
 198   base::FilePath file = source_path_.AppendASCII("places.sqlite");
 199   if (!base::PathExists(file))
 200     return;
 201
 202   sql::Connection db;
 203   if (!db.Open(file))
 204     return;
 205
 206   // Get the bookmark folders that we are interested in.
 207   int toolbar_folder_id = -1;
 208   int menu_folder_id = -1;
 209   int unsorted_folder_id = -1;
 210   LoadRootNodeID(&db, &toolbar_folder_id, &menu_folder_id, &unsorted_folder_id);
 211
 212   // Load livemark IDs.
 213   std::set<int> livemark_id;
 214   LoadLivemarkIDs(&db, &livemark_id);
 215
 216   // Load the default bookmarks.
 217   std::set<GURL> default_urls;
 218   LoadDefaultBookmarks(app_path_, &default_urls);
 219
 220   BookmarkList list;
 221   GetTopBookmarkFolder(&db, toolbar_folder_id, &list);
 222   GetTopBookmarkFolder(&db, menu_folder_id, &list);
 223   GetTopBookmarkFolder(&db, unsorted_folder_id, &list);
 224   size_t count = list.size();
 225   for (size_t i = 0; i < count; ++i)
 226     GetWholeBookmarkFolder(&db, &list, i, NULL);
 227
 228   std::vector<ImportedBookmarkEntry> bookmarks;
 229   std::vector<importer::SearchEngineInfo> search_engines;
 230   FaviconMap favicon_map;
 231
 232   // TODO(jcampan): http://b/issue?id=1196285 we do not support POST based
 233   //                keywords yet.  We won't include them in the list.
 234   std::set<int> post_keyword_ids;
 235   const char query[] =
 236       "SELECT b.id FROM moz_bookmarks b "
 237       "INNER JOIN moz_items_annos ia ON ia.item_id = b.id "
 238       "INNER JOIN moz_anno_attributes aa ON ia.anno_attribute_id = aa.id "
 239       "WHERE aa.name = 'bookmarkProperties/POSTData'";
 240   sql::Statement s(db.GetUniqueStatement(query));
 241
 242   if (!s.is_valid())
 243     return;
 244
 245   while (s.Step() && !cancelled())
 246     post_keyword_ids.insert(s.ColumnInt(0));
 247
 248   for (size_t i = 0; i < list.size(); ++i) {
 249     BookmarkItem* item = list[i];
 250
 251     // Folders are added implicitly on adding children, so we only explicitly
 252     // add empty folders.
 253     if (item->type != TYPE_BOOKMARK &&
 254         ((item->type != TYPE_FOLDER) || !item->empty_folder))
 255       continue;
 256
 257     if (CanImportURL(item->url)) {
 258       // Skip the default bookmarks and unwanted URLs.
 259       if (default_urls.find(item->url) != default_urls.end() ||
 260           post_keyword_ids.find(item->id) != post_keyword_ids.end())
 261         continue;
 262
 263       // Find the bookmark path by tracing their links to parent folders.
 264       std::vector<base::string16> path;
 265       BookmarkItem* child = item;
 266       bool found_path = false;
 267       bool is_in_toolbar = false;
 268       while (child->parent >= 0) {
 269         BookmarkItem* parent = list[child->parent];
 270         if (livemark_id.find(parent->id) != livemark_id.end()) {
 271           // Don't import live bookmarks.
 272           break;
 273         }
 274
 275         if (parent->id != menu_folder_id) {
 276           // To avoid excessive nesting, omit the name for the bookmarks menu
 277           // folder.
 278           path.insert(path.begin(), parent->title);
 279         }
 280
 281         if (parent->id == toolbar_folder_id)
 282           is_in_toolbar = true;
 283
 284         if (parent->id == toolbar_folder_id ||
 285             parent->id == menu_folder_id ||
 286             parent->id == unsorted_folder_id) {
 287           // We've reached a root node, hooray!
 288           found_path = true;
 289           break;
 290         }
 291
 292         child = parent;
 293       }
 294
 295       if (!found_path)
 296         continue;
 297
 298       ImportedBookmarkEntry entry;
 299       entry.creation_time = item->date_added;
 300       entry.title = item->title;
 301       entry.url = item->url;
 302       entry.path = path;
 303       entry.in_toolbar = is_in_toolbar;
 304       entry.is_folder = item->type == TYPE_FOLDER;
 305
 306       bookmarks.push_back(entry);
 307     }
 308
 309     if (item->type == TYPE_BOOKMARK) {
 310       if (item->favicon)
 311         favicon_map[item->favicon].insert(item->url);
 312
 313       // Import this bookmark as a search engine if it has a keyword and its URL
 314       // is usable as a search engine URL. (Even if the URL doesn't allow
 315       // substitution, importing as a "search engine" allows users to trigger
 316       // the bookmark by entering its keyword in the omnibox.)
 317       if (item->keyword.empty())
 318         continue;
 319       importer::SearchEngineInfo search_engine_info;
 320       std::string search_engine_url;
 321       if (item->url.is_valid())
 322         search_engine_info.url = base::UTF8ToUTF16(item->url.spec());
 323       else if (bookmark_html_reader::CanImportURLAsSearchEngine(
 324                    item->url,
 325                    &search_engine_url))
 326         search_engine_info.url = base::UTF8ToUTF16(search_engine_url);
 327       else
 328         continue;
 329       search_engine_info.keyword = base::UTF8ToUTF16(item->keyword);
 330       search_engine_info.display_name = item->title;
 331       search_engines.push_back(search_engine_info);
 332     }
 333   }
 334
 335   STLDeleteElements(&list);
 336
 337   // Write into profile.
 338   if (!bookmarks.empty() && !cancelled()) {
 339     const base::string16& first_folder_name =
 340         bridge_->GetLocalizedString(IDS_BOOKMARK_GROUP_FROM_FIREFOX);
 341     bridge_->AddBookmarks(bookmarks, first_folder_name);
 342   }
 343   if (!search_engines.empty() && !cancelled()) {
 344     bridge_->SetKeywords(search_engines, false);
 345   }
 346   if (!favicon_map.empty() && !cancelled()) {
 347     favicon_base::FaviconUsageDataList favicons;
 348     LoadFavicons(&db, favicon_map, &favicons);
 349     bridge_->SetFavicons(favicons);
 350   }
 351 }
 352
 353 void FirefoxImporter::ImportPasswords() {
 354   // Initializes NSS3.
 355   NSSDecryptor decryptor;
 356   if (!decryptor.Init(source_path_, source_path_) &&
 357       !decryptor.Init(app_path_, source_path_)) {
 358     return;
 359   }
 360
 361   std::vector<autofill::PasswordForm> forms;
 362   base::FilePath source_path = source_path_;
 363   base::FilePath file = source_path.AppendASCII("signons.sqlite");
 364   if (base::PathExists(file)) {
 365     // Since Firefox 3.1, passwords are in signons.sqlite db.
 366     decryptor.ReadAndParseSignons(file, &forms);
 367   } else {
 368     // Firefox 3.0 uses signons3.txt to store the passwords.
 369     file = source_path.AppendASCII("signons3.txt");
 370     if (!base::PathExists(file))
 371       file = source_path.AppendASCII("signons2.txt");
 372
 373     std::string content;
 374     base::ReadFileToString(file, &content);
 375     decryptor.ParseSignons(content, &forms);
 376   }
 377
 378   if (!cancelled()) {
 379     for (size_t i = 0; i < forms.size(); ++i) {
 380       if (!forms[i].username_value.empty() ||
 381           !forms[i].password_value.empty() ||
 382           forms[i].blacklisted_by_user) {
 383         bridge_->SetPasswordForm(forms[i]);
 384       }
 385     }
 386   }
 387 }
 388
 389 void FirefoxImporter::ImportSearchEngines() {
 390   std::vector<std::string> search_engine_data;
 391   GetSearchEnginesXMLData(&search_engine_data);
 392
 393   bridge_->SetFirefoxSearchEnginesXMLData(search_engine_data);
 394 }
 395
 396 void FirefoxImporter::ImportHomepage() {
 397   GURL home_page = GetHomepage(source_path_);
 398   if (home_page.is_valid() && !IsDefaultHomepage(home_page, app_path_)) {
 399     bridge_->AddHomePage(home_page);
 400   }
 401 }
 402
 403 void FirefoxImporter::ImportAutofillFormData() {
 404   base::FilePath file = source_path_.AppendASCII("formhistory.sqlite");
 405   if (!base::PathExists(file))
 406     return;
 407
 408   sql::Connection db;
 409   if (!db.Open(file))
 410     return;
 411
 412   const char query[] =
 413       "SELECT fieldname, value, timesUsed, firstUsed, lastUsed FROM "
 414       "moz_formhistory";
 415
 416   sql::Statement s(db.GetUniqueStatement(query));
 417
 418   std::vector<ImporterAutofillFormDataEntry> form_entries;
 419   while (s.Step() && !cancelled()) {
 420     ImporterAutofillFormDataEntry form_entry;
 421     form_entry.name = s.ColumnString16(0);
 422     form_entry.value = s.ColumnString16(1);
 423     form_entry.times_used = s.ColumnInt(2);
 424     form_entry.first_used = base::Time::FromTimeT(s.ColumnInt64(3) / 1000000);
 425     form_entry.last_used = base::Time::FromTimeT(s.ColumnInt64(4) / 1000000);
 426
 427     // Don't import search bar history.
 428     if (base::UTF16ToUTF8(form_entry.name) == "searchbar-history")
 429       continue;
 430
 431     form_entries.push_back(form_entry);
 432   }
 433
 434   if (!form_entries.empty() && !cancelled())
 435     bridge_->SetAutofillFormData(form_entries);
 436 }
 437
 438 void FirefoxImporter::GetSearchEnginesXMLData(
 439     std::vector<std::string>* search_engine_data) {
 440   base::FilePath file = source_path_.AppendASCII("search.sqlite");
 441   if (!base::PathExists(file)) {
 442     // Since Firefox 3.5, search engines are no longer stored in search.sqlite.
 443     // Instead, search.json is used for storing search engines.
 444     GetSearchEnginesXMLDataFromJSON(search_engine_data);
 445     return;
 446   }
 447
 448   sql::Connection db;
 449   if (!db.Open(file))
 450     return;
 451
 452   const char query[] =
 453       "SELECT engineid FROM engine_data "
 454       "WHERE engineid NOT IN "
 455       "(SELECT engineid FROM engine_data "
 456       "WHERE name='hidden') "
 457       "ORDER BY value ASC";
 458
 459   sql::Statement s(db.GetUniqueStatement(query));
 460   if (!s.is_valid())
 461     return;
 462
 463   const base::FilePath searchplugins_path(FILE_PATH_LITERAL("searchplugins"));
 464   // Search engine definitions are XMLs stored in two directories. Default
 465   // engines are in the app directory (app_path_) and custom engines are
 466   // in the profile directory (source_path_).
 467
 468   // Since Firefox 21, app_path_ engines are in 'browser' subdirectory:
 469   base::FilePath app_path =
 470       app_path_.AppendASCII("browser").Append(searchplugins_path);
 471   if (!base::PathExists(app_path)) {
 472     // This might be an older Firefox, try old location without the 'browser'
 473     // path component:
 474     app_path = app_path_.Append(searchplugins_path);
 475   }
 476
 477   base::FilePath profile_path = source_path_.Append(searchplugins_path);
 478
 479   // Firefox doesn't store a search engine in its sqlite database unless the
 480   // user has added a engine. So we get search engines from sqlite db as well
 481   // as from the file system.
 482   if (s.Step()) {
 483     const std::string kAppPrefix("[app]/");
 484     const std::string kProfilePrefix("[profile]/");
 485     do {
 486       base::FilePath file;
 487       std::string engine(s.ColumnString(0));
 488
 489       // The string contains [app]/<name>.xml or [profile]/<name>.xml where
 490       // the [app] and [profile] need to be replaced with the actual app or
 491       // profile path.
 492       size_t index = engine.find(kAppPrefix);
 493       if (index != std::string::npos) {
 494         // Remove '[app]/'.
 495         file = app_path.AppendASCII(engine.substr(index + kAppPrefix.length()));
 496       } else if ((index = engine.find(kProfilePrefix)) != std::string::npos) {
 497         // Remove '[profile]/'.
 498           file = profile_path.AppendASCII(
 499               engine.substr(index + kProfilePrefix.length()));
 500       } else {
 501         // Looks like absolute path to the file.
 502         file = base::FilePath::FromUTF8Unsafe(engine);
 503       }
 504       std::string file_data;
 505       base::ReadFileToString(file, &file_data);
 506       search_engine_data->push_back(file_data);
 507     } while (s.Step() && !cancelled());
 508   }
 509
 510 #if defined(OS_POSIX)
 511   // Ubuntu-flavored Firefox supports locale-specific search engines via
 512   // locale-named subdirectories. They fall back to en-US.
 513   // See http://crbug.com/53899
 514   // TODO(jshin): we need to make sure our locale code matches that of
 515   // Firefox.
 516   DCHECK(!locale_.empty());
 517   base::FilePath locale_app_path = app_path.AppendASCII(locale_);
 518   base::FilePath default_locale_app_path = app_path.AppendASCII("en-US");
 519   if (base::DirectoryExists(locale_app_path))
 520     app_path = locale_app_path;
 521   else if (base::DirectoryExists(default_locale_app_path))
 522     app_path = default_locale_app_path;
 523 #endif
 524
 525   // Get search engine definition from file system.
 526   base::FileEnumerator engines(app_path, false, base::FileEnumerator::FILES);
 527   for (base::FilePath engine_path = engines.Next();
 528        !engine_path.value().empty(); engine_path = engines.Next()) {
 529     std::string file_data;
 530     base::ReadFileToString(file, &file_data);
 531     search_engine_data->push_back(file_data);
 532   }
 533 }
 534
 535 void FirefoxImporter::GetSearchEnginesXMLDataFromJSON(
 536     std::vector<std::string>* search_engine_data) {
 537   // search-metadata.json contains keywords for search engines. This
 538   // file exists only if the user has set keywords for search engines.
 539   base::FilePath search_metadata_json_file =
 540       source_path_.AppendASCII("search-metadata.json");
 541   JSONFileValueDeserializer metadata_deserializer(search_metadata_json_file);
 542   scoped_ptr<base::Value> metadata_root(
 543       metadata_deserializer.Deserialize(NULL, NULL));
 544   const base::DictionaryValue* search_metadata_root = NULL;
 545   if (metadata_root)
 546     metadata_root->GetAsDictionary(&search_metadata_root);
 547
 548   // search.json contains information about search engines to import.
 549   base::FilePath search_json_file = source_path_.AppendASCII("search.json");
 550   if (!base::PathExists(search_json_file))
 551     return;
 552
 553   JSONFileValueDeserializer deserializer(search_json_file);
 554   scoped_ptr<base::Value> root(deserializer.Deserialize(NULL, NULL));
 555   const base::DictionaryValue* search_root = NULL;
 556   if (!root || !root->GetAsDictionary(&search_root))
 557     return;
 558
 559   const std::string kDirectories("directories");
 560   const base::DictionaryValue* search_directories = NULL;
 561   if (!search_root->GetDictionary(kDirectories, &search_directories))
 562     return;
 563
 564   // Dictionary |search_directories| contains a list of search engines
 565   // (default and installed). The list can be found from key <engines>
 566   // of the dictionary. Key <engines> is a grandchild of key <directories>.
 567   // However, key <engines> parent's key is dynamic which depends on
 568   // operating systems. For example,
 569   //   Ubuntu (for default search engine):
 570   //     /usr/lib/firefox/distribution/searchplugins/locale/en-US
 571   //   Ubuntu (for installed search engines):
 572   //     /home/<username>/.mozilla/firefox/lcd50n4n.default/searchplugins
 573   //   Windows (for default search engine):
 574   //     C:\\Program Files (x86)\\Mozilla Firefox\\browser\\searchplugins
 575   // Therefore, it needs to be retrieved by searching.
 576
 577   for (base::DictionaryValue::Iterator it(*search_directories); !it.IsAtEnd();
 578        it.Advance()) {
 579     // The key of |it| may contains dot (.) which cannot be used as <key>
 580     // for retrieving <engines>. Hence, it is needed to get |it| as dictionary.
 581     // The resulted dictionary can be used for retrieving <engines>.
 582     const std::string kEngines("engines");
 583     const base::DictionaryValue* search_directory = NULL;
 584     if (!it.value().GetAsDictionary(&search_directory))
 585       continue;
 586
 587     const base::ListValue* search_engines = NULL;
 588     if (!search_directory->GetList(kEngines, &search_engines))
 589       continue;
 590
 591     const std::string kFilePath("filePath");
 592     const std::string kHidden("_hidden");
 593     for (size_t i = 0; i < search_engines->GetSize(); ++i) {
 594       const base::DictionaryValue* engine_info = NULL;
 595       if (!search_engines->GetDictionary(i, &engine_info))
 596         continue;
 597
 598       bool is_hidden = false;
 599       std::string file_path;
 600       if (!engine_info->GetBoolean(kHidden, &is_hidden) ||
 601           !engine_info->GetString(kFilePath, &file_path))
 602         continue;
 603
 604       if (!is_hidden) {
 605         const std::string kAppPrefix("[app]/");
 606         const std::string kProfilePrefix("[profile]/");
 607         base::FilePath xml_file = base::FilePath::FromUTF8Unsafe(file_path);
 608
 609         // If |file_path| contains [app] or [profile] then they need to be
 610         // replaced with the actual app or profile path.
 611         size_t index = file_path.find(kAppPrefix);
 612         if (index != std::string::npos) {
 613           // Replace '[app]/' with actual app path.
 614           xml_file = app_path_.AppendASCII("searchplugins").AppendASCII(
 615               file_path.substr(index + kAppPrefix.length()));
 616         } else if ((index = file_path.find(kProfilePrefix)) !=
 617                    std::string::npos) {
 618           // Replace '[profile]/' with actual profile path.
 619           xml_file = source_path_.AppendASCII("searchplugins").AppendASCII(
 620               file_path.substr(index + kProfilePrefix.length()));
 621         }
 622
 623         std::string file_data;
 624         base::ReadFileToString(xml_file, &file_data);
 625
 626         // If a keyword is mentioned for this search engine, then add
 627         // it to the XML string as an <Alias> element and use this updated
 628         // string.
 629         const base::DictionaryValue* search_xml_path = NULL;
 630         if (search_metadata_root && search_metadata_root->HasKey(file_path) &&
 631             search_metadata_root->GetDictionaryWithoutPathExpansion(
 632                 file_path, &search_xml_path)) {
 633           std::string alias;
 634           search_xml_path->GetString("alias", &alias);
 635
 636           // Add <Alias> element as the last child element.
 637           size_t end_of_parent = file_data.find("</SearchPlugin>");
 638           if (end_of_parent != std::string::npos && !alias.empty())
 639             file_data.insert(end_of_parent, "<Alias>" + alias + "</Alias> \n");
 640         }
 641         search_engine_data->push_back(file_data);
 642       }
 643     }
 644   }
 645 }
 646
 647 void FirefoxImporter::LoadRootNodeID(sql::Connection* db,
 648                                       int* toolbar_folder_id,
 649                                       int* menu_folder_id,
 650                                       int* unsorted_folder_id) {
 651   static const char kToolbarFolderName[] = "toolbar";
 652   static const char kMenuFolderName[] = "menu";
 653   static const char kUnsortedFolderName[] = "unfiled";
 654
 655   const char query[] = "SELECT root_name, folder_id FROM moz_bookmarks_roots";
 656   sql::Statement s(db->GetUniqueStatement(query));
 657
 658   while (s.Step()) {
 659     std::string folder = s.ColumnString(0);
 660     int id = s.ColumnInt(1);
 661     if (folder == kToolbarFolderName)
 662       *toolbar_folder_id = id;
 663     else if (folder == kMenuFolderName)
 664       *menu_folder_id = id;
 665     else if (folder == kUnsortedFolderName)
 666       *unsorted_folder_id = id;
 667   }
 668 }
 669
 670 void FirefoxImporter::LoadLivemarkIDs(sql::Connection* db,
 671                                        std::set<int>* livemark) {
 672   static const char kFeedAnnotation[] = "livemark/feedURI";
 673   livemark->clear();
 674
 675   const char query[] =
 676       "SELECT b.item_id "
 677       "FROM moz_anno_attributes a "
 678       "JOIN moz_items_annos b ON a.id = b.anno_attribute_id "
 679       "WHERE a.name = ? ";
 680   sql::Statement s(db->GetUniqueStatement(query));
 681   s.BindString(0, kFeedAnnotation);
 682
 683   while (s.Step() && !cancelled())
 684     livemark->insert(s.ColumnInt(0));
 685 }
 686
 687 void FirefoxImporter::GetTopBookmarkFolder(sql::Connection* db,
 688                                             int folder_id,
 689                                             BookmarkList* list) {
 690   const char query[] =
 691       "SELECT b.title "
 692       "FROM moz_bookmarks b "
 693       "WHERE b.type = 2 AND b.id = ? "
 694       "ORDER BY b.position";
 695   sql::Statement s(db->GetUniqueStatement(query));
 696   s.BindInt(0, folder_id);
 697
 698   if (s.Step()) {
 699     BookmarkItem* item = new BookmarkItem;
 700     item->parent = -1;  // The top level folder has no parent.
 701     item->id = folder_id;
 702     item->title = s.ColumnString16(0);
 703     item->type = TYPE_FOLDER;
 704     item->favicon = 0;
 705     item->empty_folder = true;
 706     list->push_back(item);
 707   }
 708 }
 709
 710 void FirefoxImporter::GetWholeBookmarkFolder(sql::Connection* db,
 711                                               BookmarkList* list,
 712                                               size_t position,
 713                                               bool* empty_folder) {
 714   if (position >= list->size()) {
 715     NOTREACHED();
 716     return;
 717   }
 718
 719   const char query[] =
 720       "SELECT b.id, h.url, COALESCE(b.title, h.title), "
 721       "b.type, k.keyword, b.dateAdded, h.favicon_id "
 722       "FROM moz_bookmarks b "
 723       "LEFT JOIN moz_places h ON b.fk = h.id "
 724       "LEFT JOIN moz_keywords k ON k.id = b.keyword_id "
 725       "WHERE b.type IN (1,2) AND b.parent = ? "
 726       "ORDER BY b.position";
 727   sql::Statement s(db->GetUniqueStatement(query));
 728   s.BindInt(0, (*list)[position]->id);
 729
 730   BookmarkList temp_list;
 731   while (s.Step()) {
 732     BookmarkItem* item = new BookmarkItem;
 733     item->parent = static_cast<int>(position);
 734     item->id = s.ColumnInt(0);
 735     item->url = GURL(s.ColumnString(1));
 736     item->title = s.ColumnString16(2);
 737     item->type = static_cast<BookmarkItemType>(s.ColumnInt(3));
 738     item->keyword = s.ColumnString(4);
 739     item->date_added = base::Time::FromTimeT(s.ColumnInt64(5)/1000000);
 740     item->favicon = s.ColumnInt64(6);
 741     item->empty_folder = true;
 742
 743     temp_list.push_back(item);
 744     if (empty_folder != NULL)
 745       *empty_folder = false;
 746   }
 747
 748   // Appends all items to the list.
 749   for (BookmarkList::iterator i = temp_list.begin();
 750        i != temp_list.end(); ++i) {
 751     list->push_back(*i);
 752     // Recursive add bookmarks in sub-folders.
 753     if ((*i)->type == TYPE_FOLDER)
 754       GetWholeBookmarkFolder(db, list, list->size() - 1, &(*i)->empty_folder);
 755   }
 756 }
 757
 758 void FirefoxImporter::LoadFavicons(
 759     sql::Connection* db,
 760     const FaviconMap& favicon_map,
 761     favicon_base::FaviconUsageDataList* favicons) {
 762   const char query[] = "SELECT url, data FROM moz_favicons WHERE id=?";
 763   sql::Statement s(db->GetUniqueStatement(query));
 764
 765   if (!s.is_valid())
 766     return;
 767
 768   for (FaviconMap::const_iterator i = favicon_map.begin();
 769        i != favicon_map.end(); ++i) {
 770     s.BindInt64(0, i->first);
 771     if (s.Step()) {
 772       favicon_base::FaviconUsageData usage;
 773
 774       usage.favicon_url = GURL(s.ColumnString(0));
 775       if (!usage.favicon_url.is_valid())
 776         continue;  // Don't bother importing favicons with invalid URLs.
 777
 778       std::vector<unsigned char> data;
 779       s.ColumnBlobAsVector(1, &data);
 780       if (data.empty())
 781         continue;  // Data definitely invalid.
 782
 783       if (!importer::ReencodeFavicon(&data[0], data.size(), &usage.png_data))
 784         continue;  // Unable to decode.
 785
 786       usage.urls = i->second;
 787       favicons->push_back(usage);
 788     }
 789     s.Reset(true);
 790   }
 791 }