history_backend.cc revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1
1// Copyright (c) 2012 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/browser/history/history_backend.h" 6 7#include <algorithm> 8#include <functional> 9#include <list> 10#include <map> 11#include <set> 12#include <vector> 13 14#include "base/basictypes.h" 15#include "base/bind.h" 16#include "base/compiler_specific.h" 17#include "base/files/file_enumerator.h" 18#include "base/memory/scoped_ptr.h" 19#include "base/memory/scoped_vector.h" 20#include "base/message_loop/message_loop.h" 21#include "base/metrics/histogram.h" 22#include "base/rand_util.h" 23#include "base/strings/string_util.h" 24#include "base/strings/utf_string_conversions.h" 25#include "base/time/time.h" 26#include "chrome/browser/autocomplete/history_url_provider.h" 27#include "chrome/browser/chrome_notification_types.h" 28#include "chrome/browser/favicon/favicon_changed_details.h" 29#include "chrome/browser/history/download_row.h" 30#include "chrome/browser/history/history_db_task.h" 31#include "chrome/browser/history/history_notifications.h" 32#include "chrome/browser/history/in_memory_history_backend.h" 33#include "chrome/browser/history/page_usage_data.h" 34#include "chrome/browser/history/top_sites.h" 35#include "chrome/browser/history/typed_url_syncable_service.h" 36#include "chrome/browser/history/visit_filter.h" 37#include "chrome/common/chrome_constants.h" 38#include "chrome/common/importer/imported_favicon_usage.h" 39#include "chrome/common/url_constants.h" 40#include "components/bookmarks/core/browser/bookmark_service.h" 41#include "components/favicon_base/select_favicon_frames.h" 42#include "grit/chromium_strings.h" 43#include "grit/generated_resources.h" 44#include "net/base/registry_controlled_domains/registry_controlled_domain.h" 45#include "sql/error_delegate_util.h" 46#include "url/gurl.h" 47 48#if defined(OS_ANDROID) 49#include "chrome/browser/history/android/android_provider_backend.h" 50#endif 51 52using base::Time; 53using base::TimeDelta; 54using base::TimeTicks; 55 56/* The HistoryBackend consists of a number of components: 57 58 HistoryDatabase (stores past 3 months of history) 59 URLDatabase (stores a list of URLs) 60 DownloadDatabase (stores a list of downloads) 61 VisitDatabase (stores a list of visits for the URLs) 62 VisitSegmentDatabase (stores groups of URLs for the most visited view). 63 64 ArchivedDatabase (stores history older than 3 months) 65 URLDatabase (stores a list of URLs) 66 DownloadDatabase (stores a list of downloads) 67 VisitDatabase (stores a list of visits for the URLs) 68 69 (this does not store visit segments as they expire after 3 mos.) 70 71 ExpireHistoryBackend (manages moving things from HistoryDatabase to 72 the ArchivedDatabase and deleting) 73*/ 74 75namespace history { 76 77// How long we keep segment data for in days. Currently 3 months. 78// This value needs to be greater or equal to 79// MostVisitedModel::kMostVisitedScope but we don't want to introduce a direct 80// dependency between MostVisitedModel and the history backend. 81const int kSegmentDataRetention = 90; 82 83// How long we'll wait to do a commit, so that things are batched together. 84const int kCommitIntervalSeconds = 10; 85 86// The amount of time before we re-fetch the favicon. 87const int kFaviconRefetchDays = 7; 88 89// The maximum number of items we'll allow in the redirect list before 90// deleting some. 91const int kMaxRedirectCount = 32; 92 93// The number of days old a history entry can be before it is considered "old" 94// and is archived. 95const int kArchiveDaysThreshold = 90; 96 97#if defined(OS_ANDROID) 98// The maximum number of top sites to track when recording top page visit stats. 99const size_t kPageVisitStatsMaxTopSites = 50; 100#endif 101 102// Converts from PageUsageData to MostVisitedURL. |redirects| is a 103// list of redirects for this URL. Empty list means no redirects. 104MostVisitedURL MakeMostVisitedURL(const PageUsageData& page_data, 105 const RedirectList& redirects) { 106 MostVisitedURL mv; 107 mv.url = page_data.GetURL(); 108 mv.title = page_data.GetTitle(); 109 if (redirects.empty()) { 110 // Redirects must contain at least the target url. 111 mv.redirects.push_back(mv.url); 112 } else { 113 mv.redirects = redirects; 114 if (mv.redirects[mv.redirects.size() - 1] != mv.url) { 115 // The last url must be the target url. 116 mv.redirects.push_back(mv.url); 117 } 118 } 119 return mv; 120} 121 122// This task is run on a timer so that commits happen at regular intervals 123// so they are batched together. The important thing about this class is that 124// it supports canceling of the task so the reference to the backend will be 125// freed. The problem is that when history is shutting down, there is likely 126// to be one of these commits still pending and holding a reference. 127// 128// The backend can call Cancel to have this task release the reference. The 129// task will still run (if we ever get to processing the event before 130// shutdown), but it will not do anything. 131// 132// Note that this is a refcounted object and is not a task in itself. It should 133// be assigned to a RunnableMethod. 134// 135// TODO(brettw): bug 1165182: This should be replaced with a 136// base::WeakPtrFactory which will handle everything automatically (like we do 137// in ExpireHistoryBackend). 138class CommitLaterTask : public base::RefCounted<CommitLaterTask> { 139 public: 140 explicit CommitLaterTask(HistoryBackend* history_backend) 141 : history_backend_(history_backend) { 142 } 143 144 // The backend will call this function if it is being destroyed so that we 145 // release our reference. 146 void Cancel() { 147 history_backend_ = NULL; 148 } 149 150 void RunCommit() { 151 if (history_backend_.get()) 152 history_backend_->Commit(); 153 } 154 155 private: 156 friend class base::RefCounted<CommitLaterTask>; 157 158 ~CommitLaterTask() {} 159 160 scoped_refptr<HistoryBackend> history_backend_; 161}; 162 163// HistoryBackend -------------------------------------------------------------- 164 165HistoryBackend::HistoryBackend(const base::FilePath& history_dir, 166 Delegate* delegate, 167 BookmarkService* bookmark_service) 168 : delegate_(delegate), 169 history_dir_(history_dir), 170 scheduled_kill_db_(false), 171 expirer_(this, bookmark_service), 172 recent_redirects_(kMaxRedirectCount), 173 backend_destroy_message_loop_(NULL), 174 segment_queried_(false), 175 bookmark_service_(bookmark_service) { 176} 177 178HistoryBackend::~HistoryBackend() { 179 DCHECK(!scheduled_commit_.get()) << "Deleting without cleanup"; 180 ReleaseDBTasks(); 181 182#if defined(OS_ANDROID) 183 // Release AndroidProviderBackend before other objects. 184 android_provider_backend_.reset(); 185#endif 186 187 // First close the databases before optionally running the "destroy" task. 188 CloseAllDatabases(); 189 190 if (!backend_destroy_task_.is_null()) { 191 // Notify an interested party (typically a unit test) that we're done. 192 DCHECK(backend_destroy_message_loop_); 193 backend_destroy_message_loop_->PostTask(FROM_HERE, backend_destroy_task_); 194 } 195 196#if defined(OS_ANDROID) 197 sql::Connection::Delete(GetAndroidCacheFileName()); 198#endif 199} 200 201void HistoryBackend::Init(const std::string& languages, bool force_fail) { 202 if (!force_fail) 203 InitImpl(languages); 204 delegate_->DBLoaded(); 205 typed_url_syncable_service_.reset(new TypedUrlSyncableService(this)); 206 memory_pressure_listener_.reset(new base::MemoryPressureListener( 207 base::Bind(&HistoryBackend::OnMemoryPressure, base::Unretained(this)))); 208#if defined(OS_ANDROID) 209 PopulateMostVisitedURLMap(); 210#endif 211} 212 213void HistoryBackend::SetOnBackendDestroyTask(base::MessageLoop* message_loop, 214 const base::Closure& task) { 215 if (!backend_destroy_task_.is_null()) 216 DLOG(WARNING) << "Setting more than one destroy task, overriding"; 217 backend_destroy_message_loop_ = message_loop; 218 backend_destroy_task_ = task; 219} 220 221void HistoryBackend::Closing() { 222 // Any scheduled commit will have a reference to us, we must make it 223 // release that reference before we can be destroyed. 224 CancelScheduledCommit(); 225 226 // Release our reference to the delegate, this reference will be keeping the 227 // history service alive. 228 delegate_.reset(); 229} 230 231void HistoryBackend::NotifyRenderProcessHostDestruction(const void* host) { 232 tracker_.NotifyRenderProcessHostDestruction(host); 233} 234 235base::FilePath HistoryBackend::GetThumbnailFileName() const { 236 return history_dir_.Append(chrome::kThumbnailsFilename); 237} 238 239base::FilePath HistoryBackend::GetFaviconsFileName() const { 240 return history_dir_.Append(chrome::kFaviconsFilename); 241} 242 243base::FilePath HistoryBackend::GetArchivedFileName() const { 244 return history_dir_.Append(chrome::kArchivedHistoryFilename); 245} 246 247#if defined(OS_ANDROID) 248base::FilePath HistoryBackend::GetAndroidCacheFileName() const { 249 return history_dir_.Append(chrome::kAndroidCacheFilename); 250} 251#endif 252 253SegmentID HistoryBackend::GetLastSegmentID(VisitID from_visit) { 254 // Set is used to detect referrer loops. Should not happen, but can 255 // if the database is corrupt. 256 std::set<VisitID> visit_set; 257 VisitID visit_id = from_visit; 258 while (visit_id) { 259 VisitRow row; 260 if (!db_->GetRowForVisit(visit_id, &row)) 261 return 0; 262 if (row.segment_id) 263 return row.segment_id; // Found a visit in this change with a segment. 264 265 // Check the referrer of this visit, if any. 266 visit_id = row.referring_visit; 267 268 if (visit_set.find(visit_id) != visit_set.end()) { 269 NOTREACHED() << "Loop in referer chain, giving up"; 270 break; 271 } 272 visit_set.insert(visit_id); 273 } 274 return 0; 275} 276 277SegmentID HistoryBackend::UpdateSegments( 278 const GURL& url, 279 VisitID from_visit, 280 VisitID visit_id, 281 content::PageTransition transition_type, 282 const Time ts) { 283 if (!db_) 284 return 0; 285 286 // We only consider main frames. 287 if (!content::PageTransitionIsMainFrame(transition_type)) 288 return 0; 289 290 SegmentID segment_id = 0; 291 content::PageTransition t = 292 content::PageTransitionStripQualifier(transition_type); 293 294 // Are we at the beginning of a new segment? 295 // Note that navigating to an existing entry (with back/forward) reuses the 296 // same transition type. We are not adding it as a new segment in that case 297 // because if this was the target of a redirect, we might end up with 298 // 2 entries for the same final URL. Ex: User types google.net, gets 299 // redirected to google.com. A segment is created for google.net. On 300 // google.com users navigates through a link, then press back. That last 301 // navigation is for the entry google.com transition typed. We end up adding 302 // a segment for that one as well. So we end up with google.net and google.com 303 // in the segment table, showing as 2 entries in the NTP. 304 // Note also that we should still be updating the visit count for that segment 305 // which we are not doing now. It should be addressed when 306 // http://crbug.com/96860 is fixed. 307 if ((t == content::PAGE_TRANSITION_TYPED || 308 t == content::PAGE_TRANSITION_AUTO_BOOKMARK) && 309 (transition_type & content::PAGE_TRANSITION_FORWARD_BACK) == 0) { 310 // If so, create or get the segment. 311 std::string segment_name = db_->ComputeSegmentName(url); 312 URLID url_id = db_->GetRowForURL(url, NULL); 313 if (!url_id) 314 return 0; 315 316 if (!(segment_id = db_->GetSegmentNamed(segment_name))) { 317 if (!(segment_id = db_->CreateSegment(url_id, segment_name))) { 318 NOTREACHED(); 319 return 0; 320 } 321 } else { 322 // Note: if we update an existing segment, we update the url used to 323 // represent that segment in order to minimize stale most visited 324 // images. 325 db_->UpdateSegmentRepresentationURL(segment_id, url_id); 326 } 327 } else { 328 // Note: it is possible there is no segment ID set for this visit chain. 329 // This can happen if the initial navigation wasn't AUTO_BOOKMARK or 330 // TYPED. (For example GENERATED). In this case this visit doesn't count 331 // toward any segment. 332 if (!(segment_id = GetLastSegmentID(from_visit))) 333 return 0; 334 } 335 336 // Set the segment in the visit. 337 if (!db_->SetSegmentID(visit_id, segment_id)) { 338 NOTREACHED(); 339 return 0; 340 } 341 342 // Finally, increase the counter for that segment / day. 343 if (!db_->IncreaseSegmentVisitCount(segment_id, ts, 1)) { 344 NOTREACHED(); 345 return 0; 346 } 347 return segment_id; 348} 349 350void HistoryBackend::UpdateWithPageEndTime(const void* host, 351 int32 page_id, 352 const GURL& url, 353 Time end_ts) { 354 // Will be filled with the URL ID and the visit ID of the last addition. 355 VisitID visit_id = tracker_.GetLastVisit(host, page_id, url); 356 UpdateVisitDuration(visit_id, end_ts); 357} 358 359void HistoryBackend::UpdateVisitDuration(VisitID visit_id, const Time end_ts) { 360 if (!db_) 361 return; 362 363 // Get the starting visit_time for visit_id. 364 VisitRow visit_row; 365 if (db_->GetRowForVisit(visit_id, &visit_row)) { 366 // We should never have a negative duration time even when time is skewed. 367 visit_row.visit_duration = end_ts > visit_row.visit_time ? 368 end_ts - visit_row.visit_time : TimeDelta::FromMicroseconds(0); 369 db_->UpdateVisitRow(visit_row); 370 } 371} 372 373void HistoryBackend::AddPage(const HistoryAddPageArgs& request) { 374 if (!db_) 375 return; 376 377 // Will be filled with the URL ID and the visit ID of the last addition. 378 std::pair<URLID, VisitID> last_ids(0, tracker_.GetLastVisit( 379 request.id_scope, request.page_id, request.referrer)); 380 381 VisitID from_visit_id = last_ids.second; 382 383 // If a redirect chain is given, we expect the last item in that chain to be 384 // the final URL. 385 DCHECK(request.redirects.empty() || 386 request.redirects.back() == request.url); 387 388 // If the user is adding older history, we need to make sure our times 389 // are correct. 390 if (request.time < first_recorded_time_) 391 first_recorded_time_ = request.time; 392 393 content::PageTransition request_transition = request.transition; 394 content::PageTransition stripped_transition = 395 content::PageTransitionStripQualifier(request_transition); 396 bool is_keyword_generated = 397 (stripped_transition == content::PAGE_TRANSITION_KEYWORD_GENERATED); 398 399 // If the user is navigating to a not-previously-typed intranet hostname, 400 // change the transition to TYPED so that the omnibox will learn that this is 401 // a known host. 402 bool has_redirects = request.redirects.size() > 1; 403 if (content::PageTransitionIsMainFrame(request_transition) && 404 (stripped_transition != content::PAGE_TRANSITION_TYPED) && 405 !is_keyword_generated) { 406 const GURL& origin_url(has_redirects ? 407 request.redirects[0] : request.url); 408 if (origin_url.SchemeIs(content::kHttpScheme) || 409 origin_url.SchemeIs(content::kHttpsScheme) || 410 origin_url.SchemeIs(content::kFtpScheme)) { 411 std::string host(origin_url.host()); 412 size_t registry_length = 413 net::registry_controlled_domains::GetRegistryLength( 414 host, 415 net::registry_controlled_domains::EXCLUDE_UNKNOWN_REGISTRIES, 416 net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES); 417 if (registry_length == 0 && !db_->IsTypedHost(host)) { 418 stripped_transition = content::PAGE_TRANSITION_TYPED; 419 request_transition = 420 content::PageTransitionFromInt( 421 stripped_transition | 422 content::PageTransitionGetQualifier(request_transition)); 423 } 424 } 425 } 426 427 if (!has_redirects) { 428 // The single entry is both a chain start and end. 429 content::PageTransition t = content::PageTransitionFromInt( 430 request_transition | 431 content::PAGE_TRANSITION_CHAIN_START | 432 content::PAGE_TRANSITION_CHAIN_END); 433 434 // No redirect case (one element means just the page itself). 435 last_ids = AddPageVisit(request.url, request.time, 436 last_ids.second, t, request.visit_source); 437 438 // Update the segment for this visit. KEYWORD_GENERATED visits should not 439 // result in changing most visited, so we don't update segments (most 440 // visited db). 441 if (!is_keyword_generated) { 442 UpdateSegments(request.url, from_visit_id, last_ids.second, t, 443 request.time); 444 445 // Update the referrer's duration. 446 UpdateVisitDuration(from_visit_id, request.time); 447 } 448 } else { 449 // Redirect case. Add the redirect chain. 450 451 content::PageTransition redirect_info = 452 content::PAGE_TRANSITION_CHAIN_START; 453 454 RedirectList redirects = request.redirects; 455 if (redirects[0].SchemeIs(content::kAboutScheme)) { 456 // When the redirect source + referrer is "about" we skip it. This 457 // happens when a page opens a new frame/window to about:blank and then 458 // script sets the URL to somewhere else (used to hide the referrer). It 459 // would be nice to keep all these redirects properly but we don't ever 460 // see the initial about:blank load, so we don't know where the 461 // subsequent client redirect came from. 462 // 463 // In this case, we just don't bother hooking up the source of the 464 // redirects, so we remove it. 465 redirects.erase(redirects.begin()); 466 } else if (request_transition & content::PAGE_TRANSITION_CLIENT_REDIRECT) { 467 redirect_info = content::PAGE_TRANSITION_CLIENT_REDIRECT; 468 // The first entry in the redirect chain initiated a client redirect. 469 // We don't add this to the database since the referrer is already 470 // there, so we skip over it but change the transition type of the first 471 // transition to client redirect. 472 // 473 // The referrer is invalid when restoring a session that features an 474 // https tab that redirects to a different host or to http. In this 475 // case we don't need to reconnect the new redirect with the existing 476 // chain. 477 if (request.referrer.is_valid()) { 478 DCHECK(request.referrer == redirects[0]); 479 redirects.erase(redirects.begin()); 480 481 // If the navigation entry for this visit has replaced that for the 482 // first visit, remove the CHAIN_END marker from the first visit. This 483 // can be called a lot, for example, the page cycler, and most of the 484 // time we won't have changed anything. 485 VisitRow visit_row; 486 if (request.did_replace_entry && 487 db_->GetRowForVisit(last_ids.second, &visit_row) && 488 visit_row.transition & content::PAGE_TRANSITION_CHAIN_END) { 489 visit_row.transition = content::PageTransitionFromInt( 490 visit_row.transition & ~content::PAGE_TRANSITION_CHAIN_END); 491 db_->UpdateVisitRow(visit_row); 492 } 493 } 494 } 495 496 for (size_t redirect_index = 0; redirect_index < redirects.size(); 497 redirect_index++) { 498 content::PageTransition t = 499 content::PageTransitionFromInt(stripped_transition | redirect_info); 500 501 // If this is the last transition, add a CHAIN_END marker 502 if (redirect_index == (redirects.size() - 1)) { 503 t = content::PageTransitionFromInt( 504 t | content::PAGE_TRANSITION_CHAIN_END); 505 } 506 507 // Record all redirect visits with the same timestamp. We don't display 508 // them anyway, and if we ever decide to, we can reconstruct their order 509 // from the redirect chain. 510 last_ids = AddPageVisit(redirects[redirect_index], 511 request.time, last_ids.second, 512 t, request.visit_source); 513 if (t & content::PAGE_TRANSITION_CHAIN_START) { 514 // Update the segment for this visit. 515 UpdateSegments(redirects[redirect_index], 516 from_visit_id, last_ids.second, t, request.time); 517 518 // Update the visit_details for this visit. 519 UpdateVisitDuration(from_visit_id, request.time); 520 } 521 522 // Subsequent transitions in the redirect list must all be server 523 // redirects. 524 redirect_info = content::PAGE_TRANSITION_SERVER_REDIRECT; 525 } 526 527 // Last, save this redirect chain for later so we can set titles & favicons 528 // on the redirected pages properly. 529 recent_redirects_.Put(request.url, redirects); 530 } 531 532 // TODO(brettw) bug 1140015: Add an "add page" notification so the history 533 // views can keep in sync. 534 535 // Add the last visit to the tracker so we can get outgoing transitions. 536 // TODO(evanm): Due to http://b/1194536 we lose the referrers of a subframe 537 // navigation anyway, so last_visit_id is always zero for them. But adding 538 // them here confuses main frame history, so we skip them for now. 539 if (stripped_transition != content::PAGE_TRANSITION_AUTO_SUBFRAME && 540 stripped_transition != content::PAGE_TRANSITION_MANUAL_SUBFRAME && 541 !is_keyword_generated) { 542 tracker_.AddVisit(request.id_scope, request.page_id, request.url, 543 last_ids.second); 544 } 545 546 ScheduleCommit(); 547} 548 549void HistoryBackend::InitImpl(const std::string& languages) { 550 DCHECK(!db_) << "Initializing HistoryBackend twice"; 551 // In the rare case where the db fails to initialize a dialog may get shown 552 // the blocks the caller, yet allows other messages through. For this reason 553 // we only set db_ to the created database if creation is successful. That 554 // way other methods won't do anything as db_ is still NULL. 555 556 TimeTicks beginning_time = TimeTicks::Now(); 557 558 // Compute the file names. 559 base::FilePath history_name = history_dir_.Append(chrome::kHistoryFilename); 560 base::FilePath thumbnail_name = GetFaviconsFileName(); 561 base::FilePath archived_name = GetArchivedFileName(); 562 563 // Delete the old index database files which are no longer used. 564 DeleteFTSIndexDatabases(); 565 566 // History database. 567 db_.reset(new HistoryDatabase()); 568 569 // Unretained to avoid a ref loop with db_. 570 db_->set_error_callback( 571 base::Bind(&HistoryBackend::DatabaseErrorCallback, 572 base::Unretained(this))); 573 574 sql::InitStatus status = db_->Init(history_name); 575 switch (status) { 576 case sql::INIT_OK: 577 break; 578 case sql::INIT_FAILURE: { 579 // A NULL db_ will cause all calls on this object to notice this error 580 // and to not continue. If the error callback scheduled killing the 581 // database, the task it posted has not executed yet. Try killing the 582 // database now before we close it. 583 bool kill_db = scheduled_kill_db_; 584 if (kill_db) 585 KillHistoryDatabase(); 586 UMA_HISTOGRAM_BOOLEAN("History.AttemptedToFixProfileError", kill_db); 587 delegate_->NotifyProfileError(status); 588 db_.reset(); 589 return; 590 } 591 default: 592 NOTREACHED(); 593 } 594 595 // Fill the in-memory database and send it back to the history service on the 596 // main thread. 597 { 598 scoped_ptr<InMemoryHistoryBackend> mem_backend(new InMemoryHistoryBackend); 599 if (mem_backend->Init(history_name, db_.get())) 600 delegate_->SetInMemoryBackend(mem_backend.Pass()); 601 } 602 db_->BeginExclusiveMode(); // Must be after the mem backend read the data. 603 604 // Thumbnail database. 605 // TODO(shess): "thumbnail database" these days only stores 606 // favicons. Thumbnails are stored in "top sites". Consider 607 // renaming "thumbnail" references to "favicons" or something of the 608 // sort. 609 thumbnail_db_.reset(new ThumbnailDatabase()); 610 if (thumbnail_db_->Init(thumbnail_name) != sql::INIT_OK) { 611 // Unlike the main database, we don't error out when the database is too 612 // new because this error is much less severe. Generally, this shouldn't 613 // happen since the thumbnail and main database versions should be in sync. 614 // We'll just continue without thumbnails & favicons in this case or any 615 // other error. 616 LOG(WARNING) << "Could not initialize the thumbnail database."; 617 thumbnail_db_.reset(); 618 } 619 620 // Archived database. 621 if (db_->needs_version_17_migration()) { 622 // See needs_version_17_migration() decl for more. In this case, we want 623 // to delete the archived database and need to do so before we try to 624 // open the file. We can ignore any error (maybe the file doesn't exist). 625 sql::Connection::Delete(archived_name); 626 } 627 archived_db_.reset(new ArchivedDatabase()); 628 if (!archived_db_->Init(archived_name)) { 629 LOG(WARNING) << "Could not initialize the archived database."; 630 archived_db_.reset(); 631 } 632 633 // Generate the history and thumbnail database metrics only after performing 634 // any migration work. 635 if (base::RandInt(1, 100) == 50) { 636 // Only do this computation sometimes since it can be expensive. 637 db_->ComputeDatabaseMetrics(history_name); 638 if (thumbnail_db_) 639 thumbnail_db_->ComputeDatabaseMetrics(); 640 } 641 642 // Tell the expiration module about all the nice databases we made. This must 643 // happen before db_->Init() is called since the callback ForceArchiveHistory 644 // may need to expire stuff. 645 // 646 // *sigh*, this can all be cleaned up when that migration code is removed. 647 // The main DB initialization should intuitively be first (not that it 648 // actually matters) and the expirer should be set last. 649 expirer_.SetDatabases(db_.get(), archived_db_.get(), thumbnail_db_.get()); 650 651 // Open the long-running transaction. 652 db_->BeginTransaction(); 653 if (thumbnail_db_) 654 thumbnail_db_->BeginTransaction(); 655 if (archived_db_) 656 archived_db_->BeginTransaction(); 657 658 // Get the first item in our database. 659 db_->GetStartDate(&first_recorded_time_); 660 661 // Start expiring old stuff. 662 expirer_.StartArchivingOldStuff(TimeDelta::FromDays(kArchiveDaysThreshold)); 663 664#if defined(OS_ANDROID) 665 if (thumbnail_db_) { 666 android_provider_backend_.reset(new AndroidProviderBackend( 667 GetAndroidCacheFileName(), db_.get(), thumbnail_db_.get(), 668 bookmark_service_, delegate_.get())); 669 } 670#endif 671 672 HISTOGRAM_TIMES("History.InitTime", 673 TimeTicks::Now() - beginning_time); 674} 675 676void HistoryBackend::OnMemoryPressure( 677 base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) { 678 bool trim_aggressively = memory_pressure_level == 679 base::MemoryPressureListener::MEMORY_PRESSURE_CRITICAL; 680 if (db_) 681 db_->TrimMemory(trim_aggressively); 682 if (thumbnail_db_) 683 thumbnail_db_->TrimMemory(trim_aggressively); 684 if (archived_db_) 685 archived_db_->TrimMemory(trim_aggressively); 686} 687 688void HistoryBackend::CloseAllDatabases() { 689 if (db_) { 690 // Commit the long-running transaction. 691 db_->CommitTransaction(); 692 db_.reset(); 693 // Forget the first recorded time since the database is closed. 694 first_recorded_time_ = base::Time(); 695 } 696 if (thumbnail_db_) { 697 thumbnail_db_->CommitTransaction(); 698 thumbnail_db_.reset(); 699 } 700 if (archived_db_) { 701 archived_db_->CommitTransaction(); 702 archived_db_.reset(); 703 } 704} 705 706std::pair<URLID, VisitID> HistoryBackend::AddPageVisit( 707 const GURL& url, 708 Time time, 709 VisitID referring_visit, 710 content::PageTransition transition, 711 VisitSource visit_source) { 712 // Top-level frame navigations are visible, everything else is hidden 713 bool new_hidden = !content::PageTransitionIsMainFrame(transition); 714 715 // NOTE: This code must stay in sync with 716 // ExpireHistoryBackend::ExpireURLsForVisits(). 717 // TODO(pkasting): http://b/1148304 We shouldn't be marking so many URLs as 718 // typed, which would eliminate the need for this code. 719 int typed_increment = 0; 720 content::PageTransition transition_type = 721 content::PageTransitionStripQualifier(transition); 722 if ((transition_type == content::PAGE_TRANSITION_TYPED && 723 !content::PageTransitionIsRedirect(transition)) || 724 transition_type == content::PAGE_TRANSITION_KEYWORD_GENERATED) 725 typed_increment = 1; 726 727#if defined(OS_ANDROID) 728 // Only count the page visit if it came from user browsing and only count it 729 // once when cycling through a redirect chain. 730 if (visit_source == SOURCE_BROWSED && 731 (transition & content::PAGE_TRANSITION_CHAIN_END) != 0) { 732 RecordTopPageVisitStats(url); 733 } 734#endif 735 736 // See if this URL is already in the DB. 737 URLRow url_info(url); 738 URLID url_id = db_->GetRowForURL(url, &url_info); 739 if (url_id) { 740 // Update of an existing row. 741 if (content::PageTransitionStripQualifier(transition) != 742 content::PAGE_TRANSITION_RELOAD) 743 url_info.set_visit_count(url_info.visit_count() + 1); 744 if (typed_increment) 745 url_info.set_typed_count(url_info.typed_count() + typed_increment); 746 if (url_info.last_visit() < time) 747 url_info.set_last_visit(time); 748 749 // Only allow un-hiding of pages, never hiding. 750 if (!new_hidden) 751 url_info.set_hidden(false); 752 753 db_->UpdateURLRow(url_id, url_info); 754 } else { 755 // Addition of a new row. 756 url_info.set_visit_count(1); 757 url_info.set_typed_count(typed_increment); 758 url_info.set_last_visit(time); 759 url_info.set_hidden(new_hidden); 760 761 url_id = db_->AddURL(url_info); 762 if (!url_id) { 763 NOTREACHED() << "Adding URL failed."; 764 return std::make_pair(0, 0); 765 } 766 url_info.id_ = url_id; 767 } 768 769 // Add the visit with the time to the database. 770 VisitRow visit_info(url_id, time, referring_visit, transition, 0); 771 VisitID visit_id = db_->AddVisit(&visit_info, visit_source); 772 NotifyVisitObservers(visit_info); 773 774 if (visit_info.visit_time < first_recorded_time_) 775 first_recorded_time_ = visit_info.visit_time; 776 777 // Broadcast a notification of the visit. 778 if (visit_id) { 779 if (typed_url_syncable_service_.get()) 780 typed_url_syncable_service_->OnUrlVisited(transition, &url_info); 781 782 scoped_ptr<URLVisitedDetails> details(new URLVisitedDetails); 783 details->transition = transition; 784 details->row = url_info; 785 // TODO(meelapshah) Disabled due to potential PageCycler regression. 786 // Re-enable this. 787 // GetMostRecentRedirectsTo(url, &details->redirects); 788 BroadcastNotifications(chrome::NOTIFICATION_HISTORY_URL_VISITED, 789 details.PassAs<HistoryDetails>()); 790 } else { 791 VLOG(0) << "Failed to build visit insert statement: " 792 << "url_id = " << url_id; 793 } 794 795 return std::make_pair(url_id, visit_id); 796} 797 798void HistoryBackend::AddPagesWithDetails(const URLRows& urls, 799 VisitSource visit_source) { 800 if (!db_) 801 return; 802 803 scoped_ptr<URLsModifiedDetails> modified(new URLsModifiedDetails); 804 scoped_ptr<URLsModifiedDetails> modified_in_archive(new URLsModifiedDetails); 805 for (URLRows::const_iterator i = urls.begin(); i != urls.end(); ++i) { 806 DCHECK(!i->last_visit().is_null()); 807 808 // We will add to either the archived database or the main one depending on 809 // the date of the added visit. 810 URLDatabase* url_database = NULL; 811 VisitDatabase* visit_database = NULL; 812 if (IsExpiredVisitTime(i->last_visit())) { 813 if (!archived_db_) 814 return; // No archived database to save it to, just forget this. 815 url_database = archived_db_.get(); 816 visit_database = archived_db_.get(); 817 } else { 818 url_database = db_.get(); 819 visit_database = db_.get(); 820 } 821 822 URLRow existing_url; 823 URLID url_id = url_database->GetRowForURL(i->url(), &existing_url); 824 if (!url_id) { 825 // Add the page if it doesn't exist. 826 url_id = url_database->AddURL(*i); 827 if (!url_id) { 828 NOTREACHED() << "Could not add row to DB"; 829 return; 830 } 831 832 if (i->typed_count() > 0) { 833 // Collect expired URLs that belong to |archived_db_| separately; we 834 // want to fire NOTIFICATION_HISTORY_URLS_MODIFIED only for changes that 835 // take place in the main |db_|. 836 if (url_database == db_.get()) { 837 modified->changed_urls.push_back(*i); 838 modified->changed_urls.back().set_id(url_id); // i->id_ is likely 0. 839 } else { 840 modified_in_archive->changed_urls.push_back(*i); 841 modified_in_archive->changed_urls.back().set_id(url_id); 842 } 843 } 844 } 845 846 // Sync code manages the visits itself. 847 if (visit_source != SOURCE_SYNCED) { 848 // Make up a visit to correspond to the last visit to the page. 849 VisitRow visit_info(url_id, i->last_visit(), 0, 850 content::PageTransitionFromInt( 851 content::PAGE_TRANSITION_LINK | 852 content::PAGE_TRANSITION_CHAIN_START | 853 content::PAGE_TRANSITION_CHAIN_END), 0); 854 if (!visit_database->AddVisit(&visit_info, visit_source)) { 855 NOTREACHED() << "Adding visit failed."; 856 return; 857 } 858 NotifyVisitObservers(visit_info); 859 860 if (visit_info.visit_time < first_recorded_time_) 861 first_recorded_time_ = visit_info.visit_time; 862 } 863 } 864 865 if (typed_url_syncable_service_.get()) { 866 typed_url_syncable_service_->OnUrlsModified( 867 &modified_in_archive->changed_urls); 868 typed_url_syncable_service_->OnUrlsModified(&modified->changed_urls); 869 } 870 871 // Broadcast a notification for typed URLs that have been modified. This 872 // will be picked up by the in-memory URL database on the main thread. 873 // 874 // TODO(brettw) bug 1140015: Add an "add page" notification so the history 875 // views can keep in sync. 876 BroadcastNotifications(chrome::NOTIFICATION_HISTORY_URLS_MODIFIED, 877 modified.PassAs<HistoryDetails>()); 878 879 ScheduleCommit(); 880} 881 882bool HistoryBackend::IsExpiredVisitTime(const base::Time& time) { 883 return time < expirer_.GetCurrentArchiveTime(); 884} 885 886void HistoryBackend::SetPageTitle(const GURL& url, 887 const base::string16& title) { 888 if (!db_) 889 return; 890 891 // Search for recent redirects which should get the same title. We make a 892 // dummy list containing the exact URL visited if there are no redirects so 893 // the processing below can be the same. 894 history::RedirectList dummy_list; 895 history::RedirectList* redirects; 896 RedirectCache::iterator iter = recent_redirects_.Get(url); 897 if (iter != recent_redirects_.end()) { 898 redirects = &iter->second; 899 900 // This redirect chain should have the destination URL as the last item. 901 DCHECK(!redirects->empty()); 902 DCHECK(redirects->back() == url); 903 } else { 904 // No redirect chain stored, make up one containing the URL we want so we 905 // can use the same logic below. 906 dummy_list.push_back(url); 907 redirects = &dummy_list; 908 } 909 910 scoped_ptr<URLsModifiedDetails> details(new URLsModifiedDetails); 911 for (size_t i = 0; i < redirects->size(); i++) { 912 URLRow row; 913 URLID row_id = db_->GetRowForURL(redirects->at(i), &row); 914 if (row_id && row.title() != title) { 915 row.set_title(title); 916 db_->UpdateURLRow(row_id, row); 917 details->changed_urls.push_back(row); 918 } 919 } 920 921 // Broadcast notifications for any URLs that have changed. This will 922 // update the in-memory database and the InMemoryURLIndex. 923 if (!details->changed_urls.empty()) { 924 if (typed_url_syncable_service_.get()) 925 typed_url_syncable_service_->OnUrlsModified(&details->changed_urls); 926 BroadcastNotifications(chrome::NOTIFICATION_HISTORY_URLS_MODIFIED, 927 details.PassAs<HistoryDetails>()); 928 ScheduleCommit(); 929 } 930} 931 932void HistoryBackend::AddPageNoVisitForBookmark(const GURL& url, 933 const base::string16& title) { 934 if (!db_) 935 return; 936 937 URLRow url_info(url); 938 URLID url_id = db_->GetRowForURL(url, &url_info); 939 if (url_id) { 940 // URL is already known, nothing to do. 941 return; 942 } 943 944 if (!title.empty()) { 945 url_info.set_title(title); 946 } else { 947 url_info.set_title(base::UTF8ToUTF16(url.spec())); 948 } 949 950 url_info.set_last_visit(Time::Now()); 951 // Mark the page hidden. If the user types it in, it'll unhide. 952 url_info.set_hidden(true); 953 954 db_->AddURL(url_info); 955} 956 957void HistoryBackend::IterateURLs( 958 const scoped_refptr<visitedlink::VisitedLinkDelegate::URLEnumerator>& 959 iterator) { 960 if (db_) { 961 HistoryDatabase::URLEnumerator e; 962 if (db_->InitURLEnumeratorForEverything(&e)) { 963 URLRow info; 964 while (e.GetNextURL(&info)) { 965 iterator->OnURL(info.url()); 966 } 967 iterator->OnComplete(true); // Success. 968 return; 969 } 970 } 971 iterator->OnComplete(false); // Failure. 972} 973 974bool HistoryBackend::GetAllTypedURLs(URLRows* urls) { 975 if (db_) 976 return db_->GetAllTypedUrls(urls); 977 return false; 978} 979 980bool HistoryBackend::GetVisitsForURL(URLID id, VisitVector* visits) { 981 if (db_) 982 return db_->GetVisitsForURL(id, visits); 983 return false; 984} 985 986bool HistoryBackend::GetMostRecentVisitsForURL(URLID id, 987 int max_visits, 988 VisitVector* visits) { 989 if (db_) 990 return db_->GetMostRecentVisitsForURL(id, max_visits, visits); 991 return false; 992} 993 994bool HistoryBackend::UpdateURL(URLID id, const history::URLRow& url) { 995 if (db_) 996 return db_->UpdateURLRow(id, url); 997 return false; 998} 999 1000bool HistoryBackend::AddVisits(const GURL& url, 1001 const std::vector<VisitInfo>& visits, 1002 VisitSource visit_source) { 1003 if (db_) { 1004 for (std::vector<VisitInfo>::const_iterator visit = visits.begin(); 1005 visit != visits.end(); ++visit) { 1006 if (!AddPageVisit( 1007 url, visit->first, 0, visit->second, visit_source).first) { 1008 return false; 1009 } 1010 } 1011 ScheduleCommit(); 1012 return true; 1013 } 1014 return false; 1015} 1016 1017bool HistoryBackend::RemoveVisits(const VisitVector& visits) { 1018 if (!db_) 1019 return false; 1020 1021 expirer_.ExpireVisits(visits); 1022 ScheduleCommit(); 1023 return true; 1024} 1025 1026bool HistoryBackend::GetVisitsSource(const VisitVector& visits, 1027 VisitSourceMap* sources) { 1028 if (!db_) 1029 return false; 1030 1031 db_->GetVisitsSource(visits, sources); 1032 return true; 1033} 1034 1035bool HistoryBackend::GetURL(const GURL& url, history::URLRow* url_row) { 1036 if (db_) 1037 return db_->GetRowForURL(url, url_row) != 0; 1038 return false; 1039} 1040 1041void HistoryBackend::QueryURL(scoped_refptr<QueryURLRequest> request, 1042 const GURL& url, 1043 bool want_visits) { 1044 if (request->canceled()) 1045 return; 1046 1047 bool success = false; 1048 URLRow* row = &request->value.a; 1049 VisitVector* visits = &request->value.b; 1050 if (db_) { 1051 if (db_->GetRowForURL(url, row)) { 1052 // Have a row. 1053 success = true; 1054 1055 // Optionally query the visits. 1056 if (want_visits) 1057 db_->GetVisitsForURL(row->id(), visits); 1058 } 1059 } 1060 request->ForwardResult(request->handle(), success, row, visits); 1061} 1062 1063TypedUrlSyncableService* HistoryBackend::GetTypedUrlSyncableService() const { 1064 return typed_url_syncable_service_.get(); 1065} 1066 1067// Segment usage --------------------------------------------------------------- 1068 1069void HistoryBackend::DeleteOldSegmentData() { 1070 if (db_) 1071 db_->DeleteSegmentData(Time::Now() - 1072 TimeDelta::FromDays(kSegmentDataRetention)); 1073} 1074 1075void HistoryBackend::QuerySegmentUsage( 1076 scoped_refptr<QuerySegmentUsageRequest> request, 1077 const Time from_time, 1078 int max_result_count) { 1079 if (request->canceled()) 1080 return; 1081 1082 if (db_) { 1083 db_->QuerySegmentUsage(from_time, max_result_count, &request->value.get()); 1084 1085 // If this is the first time we query segments, invoke 1086 // DeleteOldSegmentData asynchronously. We do this to cleanup old 1087 // entries. 1088 if (!segment_queried_) { 1089 segment_queried_ = true; 1090 base::MessageLoop::current()->PostTask( 1091 FROM_HERE, 1092 base::Bind(&HistoryBackend::DeleteOldSegmentData, this)); 1093 } 1094 } 1095 request->ForwardResult(request->handle(), &request->value.get()); 1096} 1097 1098// Keyword visits -------------------------------------------------------------- 1099 1100void HistoryBackend::SetKeywordSearchTermsForURL(const GURL& url, 1101 TemplateURLID keyword_id, 1102 const base::string16& term) { 1103 if (!db_) 1104 return; 1105 1106 // Get the ID for this URL. 1107 URLRow row; 1108 if (!db_->GetRowForURL(url, &row)) { 1109 // There is a small possibility the url was deleted before the keyword 1110 // was added. Ignore the request. 1111 return; 1112 } 1113 1114 db_->SetKeywordSearchTermsForURL(row.id(), keyword_id, term); 1115 1116 BroadcastNotifications( 1117 chrome::NOTIFICATION_HISTORY_KEYWORD_SEARCH_TERM_UPDATED, 1118 scoped_ptr<HistoryDetails>( 1119 new KeywordSearchUpdatedDetails(row, keyword_id, term))); 1120 ScheduleCommit(); 1121} 1122 1123void HistoryBackend::DeleteAllSearchTermsForKeyword( 1124 TemplateURLID keyword_id) { 1125 if (!db_) 1126 return; 1127 1128 db_->DeleteAllSearchTermsForKeyword(keyword_id); 1129 // TODO(sky): bug 1168470. Need to move from archive dbs too. 1130 ScheduleCommit(); 1131} 1132 1133void HistoryBackend::GetMostRecentKeywordSearchTerms( 1134 scoped_refptr<GetMostRecentKeywordSearchTermsRequest> request, 1135 TemplateURLID keyword_id, 1136 const base::string16& prefix, 1137 int max_count) { 1138 if (request->canceled()) 1139 return; 1140 1141 if (db_) { 1142 db_->GetMostRecentKeywordSearchTerms(keyword_id, prefix, max_count, 1143 &(request->value)); 1144 } 1145 request->ForwardResult(request->handle(), &request->value); 1146} 1147 1148void HistoryBackend::DeleteKeywordSearchTermForURL(const GURL& url) { 1149 if (!db_) 1150 return; 1151 1152 URLID url_id = db_->GetRowForURL(url, NULL); 1153 if (!url_id) 1154 return; 1155 db_->DeleteKeywordSearchTermForURL(url_id); 1156 1157 BroadcastNotifications( 1158 chrome::NOTIFICATION_HISTORY_KEYWORD_SEARCH_TERM_DELETED, 1159 scoped_ptr<HistoryDetails>(new KeywordSearchDeletedDetails(url_id))); 1160 ScheduleCommit(); 1161} 1162 1163void HistoryBackend::DeleteMatchingURLsForKeyword(TemplateURLID keyword_id, 1164 const base::string16& term) { 1165 if (!db_) 1166 return; 1167 1168 std::vector<KeywordSearchTermRow> rows; 1169 if (db_->GetKeywordSearchTermRows(term, &rows)) { 1170 std::vector<GURL> items_to_delete; 1171 URLRow row; 1172 for (std::vector<KeywordSearchTermRow>::iterator it = rows.begin(); 1173 it != rows.end(); ++it) { 1174 if ((it->keyword_id == keyword_id) && db_->GetURLRow(it->url_id, &row)) 1175 items_to_delete.push_back(row.url()); 1176 } 1177 DeleteURLs(items_to_delete); 1178 } 1179} 1180 1181// Downloads ------------------------------------------------------------------- 1182 1183uint32 HistoryBackend::GetNextDownloadId() { 1184 return db_ ? db_->GetNextDownloadId() : content::DownloadItem::kInvalidId; 1185} 1186 1187// Get all the download entries from the database. 1188void HistoryBackend::QueryDownloads(std::vector<DownloadRow>* rows) { 1189 if (db_) 1190 db_->QueryDownloads(rows); 1191} 1192 1193// Update a particular download entry. 1194void HistoryBackend::UpdateDownload(const history::DownloadRow& data) { 1195 if (!db_) 1196 return; 1197 db_->UpdateDownload(data); 1198 ScheduleCommit(); 1199} 1200 1201bool HistoryBackend::CreateDownload(const history::DownloadRow& history_info) { 1202 if (!db_) 1203 return false; 1204 bool success = db_->CreateDownload(history_info); 1205 ScheduleCommit(); 1206 return success; 1207} 1208 1209void HistoryBackend::RemoveDownloads(const std::set<uint32>& ids) { 1210 if (!db_) 1211 return; 1212 size_t downloads_count_before = db_->CountDownloads(); 1213 base::TimeTicks started_removing = base::TimeTicks::Now(); 1214 // HistoryBackend uses a long-running Transaction that is committed 1215 // periodically, so this loop doesn't actually hit the disk too hard. 1216 for (std::set<uint32>::const_iterator it = ids.begin(); 1217 it != ids.end(); ++it) { 1218 db_->RemoveDownload(*it); 1219 } 1220 ScheduleCommit(); 1221 base::TimeTicks finished_removing = base::TimeTicks::Now(); 1222 size_t downloads_count_after = db_->CountDownloads(); 1223 1224 DCHECK_LE(downloads_count_after, downloads_count_before); 1225 if (downloads_count_after > downloads_count_before) 1226 return; 1227 size_t num_downloads_deleted = downloads_count_before - downloads_count_after; 1228 UMA_HISTOGRAM_COUNTS("Download.DatabaseRemoveDownloadsCount", 1229 num_downloads_deleted); 1230 base::TimeDelta micros = (1000 * (finished_removing - started_removing)); 1231 UMA_HISTOGRAM_TIMES("Download.DatabaseRemoveDownloadsTime", micros); 1232 if (num_downloads_deleted > 0) { 1233 UMA_HISTOGRAM_TIMES("Download.DatabaseRemoveDownloadsTimePerRecord", 1234 (1000 * micros) / num_downloads_deleted); 1235 } 1236 DCHECK_GE(ids.size(), num_downloads_deleted); 1237 if (ids.size() < num_downloads_deleted) 1238 return; 1239 UMA_HISTOGRAM_COUNTS("Download.DatabaseRemoveDownloadsCountNotRemoved", 1240 ids.size() - num_downloads_deleted); 1241} 1242 1243void HistoryBackend::QueryHistory(scoped_refptr<QueryHistoryRequest> request, 1244 const base::string16& text_query, 1245 const QueryOptions& options) { 1246 if (request->canceled()) 1247 return; 1248 1249 TimeTicks beginning_time = TimeTicks::Now(); 1250 1251 if (db_) { 1252 if (text_query.empty()) { 1253 // Basic history query for the main database. 1254 QueryHistoryBasic(db_.get(), db_.get(), options, &request->value); 1255 1256 // Now query the archived database. This is a bit tricky because we don't 1257 // want to query it if the queried time range isn't going to find anything 1258 // in it. 1259 // TODO(brettw) bug 1171036: do blimpie querying for the archived database 1260 // as well. 1261 // if (archived_db_.get() && 1262 // expirer_.GetCurrentArchiveTime() - TimeDelta::FromDays(7)) { 1263 } else { 1264 // Text history query. 1265 QueryHistoryText(db_.get(), db_.get(), text_query, options, 1266 &request->value); 1267 if (archived_db_.get() && 1268 expirer_.GetCurrentArchiveTime() >= options.begin_time) { 1269 QueryHistoryText(archived_db_.get(), archived_db_.get(), text_query, 1270 options, &request->value); 1271 } 1272 } 1273 } 1274 1275 request->ForwardResult(request->handle(), &request->value); 1276 1277 UMA_HISTOGRAM_TIMES("History.QueryHistory", 1278 TimeTicks::Now() - beginning_time); 1279} 1280 1281// Basic time-based querying of history. 1282void HistoryBackend::QueryHistoryBasic(URLDatabase* url_db, 1283 VisitDatabase* visit_db, 1284 const QueryOptions& options, 1285 QueryResults* result) { 1286 // First get all visits. 1287 VisitVector visits; 1288 bool has_more_results = visit_db->GetVisibleVisitsInRange(options, &visits); 1289 DCHECK(static_cast<int>(visits.size()) <= options.EffectiveMaxCount()); 1290 1291 // Now add them and the URL rows to the results. 1292 URLResult url_result; 1293 for (size_t i = 0; i < visits.size(); i++) { 1294 const VisitRow visit = visits[i]; 1295 1296 // Add a result row for this visit, get the URL info from the DB. 1297 if (!url_db->GetURLRow(visit.url_id, &url_result)) { 1298 VLOG(0) << "Failed to get id " << visit.url_id 1299 << " from history.urls."; 1300 continue; // DB out of sync and URL doesn't exist, try to recover. 1301 } 1302 1303 if (!url_result.url().is_valid()) { 1304 VLOG(0) << "Got invalid URL from history.urls with id " 1305 << visit.url_id << ": " 1306 << url_result.url().possibly_invalid_spec(); 1307 continue; // Don't report invalid URLs in case of corruption. 1308 } 1309 1310 // The archived database may be out of sync with respect to starring, 1311 // titles, last visit date, etc. Therefore, we query the main DB if the 1312 // current URL database is not the main one. 1313 if (url_db == db_.get()) { 1314 // Currently querying the archived DB, update with the main database to 1315 // catch any interesting stuff. This will update it if it exists in the 1316 // main DB, and do nothing otherwise. 1317 db_->GetRowForURL(url_result.url(), &url_result); 1318 } 1319 1320 url_result.set_visit_time(visit.visit_time); 1321 1322 // Set whether the visit was blocked for a managed user by looking at the 1323 // transition type. 1324 url_result.set_blocked_visit( 1325 (visit.transition & content::PAGE_TRANSITION_BLOCKED) != 0); 1326 1327 // We don't set any of the query-specific parts of the URLResult, since 1328 // snippets and stuff don't apply to basic querying. 1329 result->AppendURLBySwapping(&url_result); 1330 } 1331 1332 if (!has_more_results && options.begin_time <= first_recorded_time_) 1333 result->set_reached_beginning(true); 1334} 1335 1336// Text-based querying of history. 1337void HistoryBackend::QueryHistoryText(URLDatabase* url_db, 1338 VisitDatabase* visit_db, 1339 const base::string16& text_query, 1340 const QueryOptions& options, 1341 QueryResults* result) { 1342 URLRows text_matches; 1343 url_db->GetTextMatches(text_query, &text_matches); 1344 1345 std::vector<URLResult> matching_visits; 1346 VisitVector visits; // Declare outside loop to prevent re-construction. 1347 for (size_t i = 0; i < text_matches.size(); i++) { 1348 const URLRow& text_match = text_matches[i]; 1349 // Get all visits for given URL match. 1350 visit_db->GetVisibleVisitsForURL(text_match.id(), options, &visits); 1351 for (size_t j = 0; j < visits.size(); j++) { 1352 URLResult url_result(text_match); 1353 url_result.set_visit_time(visits[j].visit_time); 1354 matching_visits.push_back(url_result); 1355 } 1356 } 1357 1358 std::sort(matching_visits.begin(), matching_visits.end(), 1359 URLResult::CompareVisitTime); 1360 1361 size_t max_results = options.max_count == 0 ? 1362 std::numeric_limits<size_t>::max() : static_cast<int>(options.max_count); 1363 for (std::vector<URLResult>::iterator it = matching_visits.begin(); 1364 it != matching_visits.end() && result->size() < max_results; ++it) { 1365 result->AppendURLBySwapping(&(*it)); 1366 } 1367 1368 if (matching_visits.size() == result->size() && 1369 options.begin_time <= first_recorded_time_) 1370 result->set_reached_beginning(true); 1371} 1372 1373// Frontend to GetMostRecentRedirectsFrom from the history thread. 1374void HistoryBackend::QueryRedirectsFrom( 1375 scoped_refptr<QueryRedirectsRequest> request, 1376 const GURL& url) { 1377 if (request->canceled()) 1378 return; 1379 bool success = GetMostRecentRedirectsFrom(url, &request->value); 1380 request->ForwardResult(request->handle(), url, success, &request->value); 1381} 1382 1383void HistoryBackend::QueryRedirectsTo( 1384 scoped_refptr<QueryRedirectsRequest> request, 1385 const GURL& url) { 1386 if (request->canceled()) 1387 return; 1388 bool success = GetMostRecentRedirectsTo(url, &request->value); 1389 request->ForwardResult(request->handle(), url, success, &request->value); 1390} 1391 1392void HistoryBackend::GetVisibleVisitCountToHost( 1393 scoped_refptr<GetVisibleVisitCountToHostRequest> request, 1394 const GURL& url) { 1395 if (request->canceled()) 1396 return; 1397 int count = 0; 1398 Time first_visit; 1399 const bool success = db_.get() && 1400 db_->GetVisibleVisitCountToHost(url, &count, &first_visit); 1401 request->ForwardResult(request->handle(), success, count, first_visit); 1402} 1403 1404void HistoryBackend::QueryTopURLsAndRedirects( 1405 scoped_refptr<QueryTopURLsAndRedirectsRequest> request, 1406 int result_count) { 1407 if (request->canceled()) 1408 return; 1409 1410 if (!db_) { 1411 request->ForwardResult(request->handle(), false, NULL, NULL); 1412 return; 1413 } 1414 1415 std::vector<GURL>* top_urls = &request->value.a; 1416 history::RedirectMap* redirects = &request->value.b; 1417 1418 ScopedVector<PageUsageData> data; 1419 db_->QuerySegmentUsage(base::Time::Now() - base::TimeDelta::FromDays(90), 1420 result_count, &data.get()); 1421 1422 for (size_t i = 0; i < data.size(); ++i) { 1423 top_urls->push_back(data[i]->GetURL()); 1424 RefCountedVector<GURL>* list = new RefCountedVector<GURL>; 1425 GetMostRecentRedirectsFrom(top_urls->back(), &list->data); 1426 (*redirects)[top_urls->back()] = list; 1427 } 1428 1429 request->ForwardResult(request->handle(), true, top_urls, redirects); 1430} 1431 1432// Will replace QueryTopURLsAndRedirectsRequest. 1433void HistoryBackend::QueryMostVisitedURLs( 1434 scoped_refptr<QueryMostVisitedURLsRequest> request, 1435 int result_count, 1436 int days_back) { 1437 if (request->canceled()) 1438 return; 1439 1440 if (!db_) { 1441 // No History Database - return an empty list. 1442 request->ForwardResult(request->handle(), MostVisitedURLList()); 1443 return; 1444 } 1445 1446 MostVisitedURLList* result = &request->value; 1447 QueryMostVisitedURLsImpl(result_count, days_back, result); 1448 request->ForwardResult(request->handle(), *result); 1449} 1450 1451void HistoryBackend::QueryFilteredURLs( 1452 scoped_refptr<QueryFilteredURLsRequest> request, 1453 int result_count, 1454 const history::VisitFilter& filter, 1455 bool extended_info) { 1456 if (request->canceled()) 1457 return; 1458 1459 base::Time request_start = base::Time::Now(); 1460 1461 if (!db_) { 1462 // No History Database - return an empty list. 1463 request->ForwardResult(request->handle(), FilteredURLList()); 1464 return; 1465 } 1466 1467 VisitVector visits; 1468 db_->GetDirectVisitsDuringTimes(filter, 0, &visits); 1469 1470 std::map<URLID, double> score_map; 1471 for (size_t i = 0; i < visits.size(); ++i) { 1472 score_map[visits[i].url_id] += filter.GetVisitScore(visits[i]); 1473 } 1474 1475 // TODO(georgey): experiment with visit_segment database granularity (it is 1476 // currently 24 hours) to use it directly instead of using visits database, 1477 // which is considerably slower. 1478 ScopedVector<PageUsageData> data; 1479 data.reserve(score_map.size()); 1480 for (std::map<URLID, double>::iterator it = score_map.begin(); 1481 it != score_map.end(); ++it) { 1482 PageUsageData* pud = new PageUsageData(it->first); 1483 pud->SetScore(it->second); 1484 data.push_back(pud); 1485 } 1486 1487 // Limit to the top |result_count| results. 1488 std::sort(data.begin(), data.end(), PageUsageData::Predicate); 1489 if (result_count && implicit_cast<int>(data.size()) > result_count) 1490 data.resize(result_count); 1491 1492 for (size_t i = 0; i < data.size(); ++i) { 1493 URLRow info; 1494 if (db_->GetURLRow(data[i]->GetID(), &info)) { 1495 data[i]->SetURL(info.url()); 1496 data[i]->SetTitle(info.title()); 1497 } 1498 } 1499 1500 FilteredURLList& result = request->value; 1501 for (size_t i = 0; i < data.size(); ++i) { 1502 PageUsageData* current_data = data[i]; 1503 FilteredURL url(*current_data); 1504 1505 if (extended_info) { 1506 VisitVector visits; 1507 db_->GetVisitsForURL(current_data->GetID(), &visits); 1508 if (visits.size() > 0) { 1509 url.extended_info.total_visits = visits.size(); 1510 for (size_t i = 0; i < visits.size(); ++i) { 1511 url.extended_info.duration_opened += 1512 visits[i].visit_duration.InSeconds(); 1513 if (visits[i].visit_time > url.extended_info.last_visit_time) { 1514 url.extended_info.last_visit_time = visits[i].visit_time; 1515 } 1516 } 1517 // TODO(macourteau): implement the url.extended_info.visits stat. 1518 } 1519 } 1520 result.push_back(url); 1521 } 1522 1523 int delta_time = std::max(1, std::min(999, 1524 static_cast<int>((base::Time::Now() - request_start).InMilliseconds()))); 1525 STATIC_HISTOGRAM_POINTER_BLOCK( 1526 "NewTabPage.SuggestedSitesLoadTime", 1527 Add(delta_time), 1528 base::LinearHistogram::FactoryGet("NewTabPage.SuggestedSitesLoadTime", 1529 1, 1000, 100, base::Histogram::kUmaTargetedHistogramFlag)); 1530 1531 request->ForwardResult(request->handle(), result); 1532} 1533 1534void HistoryBackend::QueryMostVisitedURLsImpl(int result_count, 1535 int days_back, 1536 MostVisitedURLList* result) { 1537 if (!db_) 1538 return; 1539 1540 ScopedVector<PageUsageData> data; 1541 db_->QuerySegmentUsage(base::Time::Now() - 1542 base::TimeDelta::FromDays(days_back), 1543 result_count, &data.get()); 1544 1545 for (size_t i = 0; i < data.size(); ++i) { 1546 PageUsageData* current_data = data[i]; 1547 RedirectList redirects; 1548 GetMostRecentRedirectsFrom(current_data->GetURL(), &redirects); 1549 MostVisitedURL url = MakeMostVisitedURL(*current_data, redirects); 1550 result->push_back(url); 1551 } 1552} 1553 1554void HistoryBackend::GetRedirectsFromSpecificVisit( 1555 VisitID cur_visit, history::RedirectList* redirects) { 1556 // Follow any redirects from the given visit and add them to the list. 1557 // It *should* be impossible to get a circular chain here, but we check 1558 // just in case to avoid infinite loops. 1559 GURL cur_url; 1560 std::set<VisitID> visit_set; 1561 visit_set.insert(cur_visit); 1562 while (db_->GetRedirectFromVisit(cur_visit, &cur_visit, &cur_url)) { 1563 if (visit_set.find(cur_visit) != visit_set.end()) { 1564 NOTREACHED() << "Loop in visit chain, giving up"; 1565 return; 1566 } 1567 visit_set.insert(cur_visit); 1568 redirects->push_back(cur_url); 1569 } 1570} 1571 1572void HistoryBackend::GetRedirectsToSpecificVisit( 1573 VisitID cur_visit, 1574 history::RedirectList* redirects) { 1575 // Follow redirects going to cur_visit. These are added to |redirects| in 1576 // the order they are found. If a redirect chain looks like A -> B -> C and 1577 // |cur_visit| = C, redirects will be {B, A} in that order. 1578 if (!db_) 1579 return; 1580 1581 GURL cur_url; 1582 std::set<VisitID> visit_set; 1583 visit_set.insert(cur_visit); 1584 while (db_->GetRedirectToVisit(cur_visit, &cur_visit, &cur_url)) { 1585 if (visit_set.find(cur_visit) != visit_set.end()) { 1586 NOTREACHED() << "Loop in visit chain, giving up"; 1587 return; 1588 } 1589 visit_set.insert(cur_visit); 1590 redirects->push_back(cur_url); 1591 } 1592} 1593 1594bool HistoryBackend::GetMostRecentRedirectsFrom( 1595 const GURL& from_url, 1596 history::RedirectList* redirects) { 1597 redirects->clear(); 1598 if (!db_) 1599 return false; 1600 1601 URLID from_url_id = db_->GetRowForURL(from_url, NULL); 1602 VisitID cur_visit = db_->GetMostRecentVisitForURL(from_url_id, NULL); 1603 if (!cur_visit) 1604 return false; // No visits for URL. 1605 1606 GetRedirectsFromSpecificVisit(cur_visit, redirects); 1607 return true; 1608} 1609 1610bool HistoryBackend::GetMostRecentRedirectsTo( 1611 const GURL& to_url, 1612 history::RedirectList* redirects) { 1613 redirects->clear(); 1614 if (!db_) 1615 return false; 1616 1617 URLID to_url_id = db_->GetRowForURL(to_url, NULL); 1618 VisitID cur_visit = db_->GetMostRecentVisitForURL(to_url_id, NULL); 1619 if (!cur_visit) 1620 return false; // No visits for URL. 1621 1622 GetRedirectsToSpecificVisit(cur_visit, redirects); 1623 return true; 1624} 1625 1626void HistoryBackend::ScheduleAutocomplete(HistoryURLProvider* provider, 1627 HistoryURLProviderParams* params) { 1628 // ExecuteWithDB should handle the NULL database case. 1629 provider->ExecuteWithDB(this, db_.get(), params); 1630} 1631 1632void HistoryBackend::DeleteFTSIndexDatabases() { 1633 // Find files on disk matching the text databases file pattern so we can 1634 // quickly test for and delete them. 1635 base::FilePath::StringType filepattern = 1636 FILE_PATH_LITERAL("History Index *"); 1637 base::FileEnumerator enumerator( 1638 history_dir_, false, base::FileEnumerator::FILES, filepattern); 1639 int num_databases_deleted = 0; 1640 base::FilePath current_file; 1641 while (!(current_file = enumerator.Next()).empty()) { 1642 if (sql::Connection::Delete(current_file)) 1643 num_databases_deleted++; 1644 } 1645 UMA_HISTOGRAM_COUNTS("History.DeleteFTSIndexDatabases", 1646 num_databases_deleted); 1647} 1648 1649void HistoryBackend::GetFavicons( 1650 const std::vector<GURL>& icon_urls, 1651 int icon_types, 1652 int desired_size_in_dip, 1653 const std::vector<ui::ScaleFactor>& desired_scale_factors, 1654 std::vector<favicon_base::FaviconBitmapResult>* bitmap_results) { 1655 UpdateFaviconMappingsAndFetchImpl(NULL, icon_urls, icon_types, 1656 desired_size_in_dip, desired_scale_factors, 1657 bitmap_results); 1658} 1659 1660void HistoryBackend::GetLargestFaviconForURL( 1661 const GURL& page_url, 1662 const std::vector<int>& icon_types, 1663 int minimum_size_in_pixels, 1664 favicon_base::FaviconBitmapResult* favicon_bitmap_result) { 1665 DCHECK(favicon_bitmap_result); 1666 1667 if (!db_ || !thumbnail_db_) 1668 return; 1669 1670 TimeTicks beginning_time = TimeTicks::Now(); 1671 1672 std::vector<IconMapping> icon_mappings; 1673 if (!thumbnail_db_->GetIconMappingsForPageURL(page_url, &icon_mappings) || 1674 icon_mappings.empty()) 1675 return; 1676 1677 int required_icon_types = 0; 1678 for (std::vector<int>::const_iterator i = icon_types.begin(); 1679 i != icon_types.end(); ++i) { 1680 required_icon_types |= *i; 1681 } 1682 1683 // Find the largest bitmap for each IconType placing in 1684 // |largest_favicon_bitmaps|. 1685 std::map<favicon_base::IconType, FaviconBitmap> largest_favicon_bitmaps; 1686 for (std::vector<IconMapping>::const_iterator i = icon_mappings.begin(); 1687 i != icon_mappings.end(); ++i) { 1688 if (!(i->icon_type & required_icon_types)) 1689 continue; 1690 std::vector<FaviconBitmapIDSize> bitmap_id_sizes; 1691 thumbnail_db_->GetFaviconBitmapIDSizes(i->icon_id, &bitmap_id_sizes); 1692 FaviconBitmap& largest = largest_favicon_bitmaps[i->icon_type]; 1693 for (std::vector<FaviconBitmapIDSize>::const_iterator j = 1694 bitmap_id_sizes.begin(); j != bitmap_id_sizes.end(); ++j) { 1695 if (largest.bitmap_id == 0 || 1696 (largest.pixel_size.width() < j->pixel_size.width() && 1697 largest.pixel_size.height() < j->pixel_size.height())) { 1698 largest.icon_id = i->icon_id; 1699 largest.bitmap_id = j->bitmap_id; 1700 largest.pixel_size = j->pixel_size; 1701 } 1702 } 1703 } 1704 if (largest_favicon_bitmaps.empty()) 1705 return; 1706 1707 // Find an icon which is larger than minimum_size_in_pixels in the order of 1708 // icon_types. 1709 FaviconBitmap largest_icon; 1710 for (std::vector<int>::const_iterator t = icon_types.begin(); 1711 t != icon_types.end(); ++t) { 1712 for (std::map<favicon_base::IconType, FaviconBitmap>::const_iterator f = 1713 largest_favicon_bitmaps.begin(); 1714 f != largest_favicon_bitmaps.end(); 1715 ++f) { 1716 if (f->first & *t && 1717 (largest_icon.bitmap_id == 0 || 1718 (largest_icon.pixel_size.height() < f->second.pixel_size.height() && 1719 largest_icon.pixel_size.width() < f->second.pixel_size.width()))) { 1720 largest_icon = f->second; 1721 } 1722 } 1723 if (largest_icon.pixel_size.width() > minimum_size_in_pixels && 1724 largest_icon.pixel_size.height() > minimum_size_in_pixels) 1725 break; 1726 } 1727 1728 GURL icon_url; 1729 favicon_base::IconType icon_type; 1730 if (!thumbnail_db_->GetFaviconHeader(largest_icon.icon_id, &icon_url, 1731 &icon_type)) { 1732 return; 1733 } 1734 1735 base::Time last_updated; 1736 favicon_base::FaviconBitmapResult bitmap_result; 1737 bitmap_result.icon_url = icon_url; 1738 bitmap_result.icon_type = icon_type; 1739 if (!thumbnail_db_->GetFaviconBitmap(largest_icon.bitmap_id, 1740 &last_updated, 1741 &bitmap_result.bitmap_data, 1742 &bitmap_result.pixel_size)) { 1743 return; 1744 } 1745 1746 bitmap_result.expired = (Time::Now() - last_updated) > 1747 TimeDelta::FromDays(kFaviconRefetchDays); 1748 if (bitmap_result.is_valid()) 1749 *favicon_bitmap_result = bitmap_result; 1750 1751 HISTOGRAM_TIMES("History.GetLargestFaviconForURL", 1752 TimeTicks::Now() - beginning_time); 1753} 1754 1755void HistoryBackend::GetFaviconsForURL( 1756 const GURL& page_url, 1757 int icon_types, 1758 int desired_size_in_dip, 1759 const std::vector<ui::ScaleFactor>& desired_scale_factors, 1760 std::vector<favicon_base::FaviconBitmapResult>* bitmap_results) { 1761 DCHECK(bitmap_results); 1762 GetFaviconsFromDB(page_url, icon_types, desired_size_in_dip, 1763 desired_scale_factors, bitmap_results); 1764} 1765 1766void HistoryBackend::GetFaviconForID( 1767 favicon_base::FaviconID favicon_id, 1768 int desired_size_in_dip, 1769 ui::ScaleFactor desired_scale_factor, 1770 std::vector<favicon_base::FaviconBitmapResult>* bitmap_results) { 1771 std::vector<favicon_base::FaviconID> favicon_ids; 1772 favicon_ids.push_back(favicon_id); 1773 std::vector<ui::ScaleFactor> desired_scale_factors; 1774 desired_scale_factors.push_back(desired_scale_factor); 1775 1776 // Get results from DB. 1777 GetFaviconBitmapResultsForBestMatch(favicon_ids, 1778 desired_size_in_dip, 1779 desired_scale_factors, 1780 bitmap_results); 1781} 1782 1783void HistoryBackend::UpdateFaviconMappingsAndFetch( 1784 const GURL& page_url, 1785 const std::vector<GURL>& icon_urls, 1786 int icon_types, 1787 int desired_size_in_dip, 1788 const std::vector<ui::ScaleFactor>& desired_scale_factors, 1789 std::vector<favicon_base::FaviconBitmapResult>* bitmap_results) { 1790 UpdateFaviconMappingsAndFetchImpl(&page_url, icon_urls, icon_types, 1791 desired_size_in_dip, desired_scale_factors, 1792 bitmap_results); 1793} 1794 1795void HistoryBackend::MergeFavicon( 1796 const GURL& page_url, 1797 const GURL& icon_url, 1798 favicon_base::IconType icon_type, 1799 scoped_refptr<base::RefCountedMemory> bitmap_data, 1800 const gfx::Size& pixel_size) { 1801 if (!thumbnail_db_ || !db_) 1802 return; 1803 1804 favicon_base::FaviconID favicon_id = 1805 thumbnail_db_->GetFaviconIDForFaviconURL(icon_url, icon_type, NULL); 1806 1807 if (!favicon_id) { 1808 // There is no favicon at |icon_url|, create it. 1809 favicon_id = thumbnail_db_->AddFavicon(icon_url, icon_type); 1810 } 1811 1812 std::vector<FaviconBitmapIDSize> bitmap_id_sizes; 1813 thumbnail_db_->GetFaviconBitmapIDSizes(favicon_id, &bitmap_id_sizes); 1814 1815 // If there is already a favicon bitmap of |pixel_size| at |icon_url|, 1816 // replace it. 1817 bool bitmap_identical = false; 1818 bool replaced_bitmap = false; 1819 for (size_t i = 0; i < bitmap_id_sizes.size(); ++i) { 1820 if (bitmap_id_sizes[i].pixel_size == pixel_size) { 1821 if (IsFaviconBitmapDataEqual(bitmap_id_sizes[i].bitmap_id, bitmap_data)) { 1822 thumbnail_db_->SetFaviconBitmapLastUpdateTime( 1823 bitmap_id_sizes[i].bitmap_id, base::Time::Now()); 1824 bitmap_identical = true; 1825 } else { 1826 thumbnail_db_->SetFaviconBitmap(bitmap_id_sizes[i].bitmap_id, 1827 bitmap_data, base::Time::Now()); 1828 replaced_bitmap = true; 1829 } 1830 break; 1831 } 1832 } 1833 1834 // Create a vector of the pixel sizes of the favicon bitmaps currently at 1835 // |icon_url|. 1836 std::vector<gfx::Size> favicon_sizes; 1837 for (size_t i = 0; i < bitmap_id_sizes.size(); ++i) 1838 favicon_sizes.push_back(bitmap_id_sizes[i].pixel_size); 1839 1840 if (!replaced_bitmap && !bitmap_identical) { 1841 // Set the preexisting favicon bitmaps as expired as the preexisting favicon 1842 // bitmaps are not consistent with the merged in data. 1843 thumbnail_db_->SetFaviconOutOfDate(favicon_id); 1844 1845 // Delete an arbitrary favicon bitmap to avoid going over the limit of 1846 // |kMaxFaviconBitmapsPerIconURL|. 1847 if (bitmap_id_sizes.size() >= kMaxFaviconBitmapsPerIconURL) { 1848 thumbnail_db_->DeleteFaviconBitmap(bitmap_id_sizes[0].bitmap_id); 1849 favicon_sizes.erase(favicon_sizes.begin()); 1850 } 1851 thumbnail_db_->AddFaviconBitmap(favicon_id, bitmap_data, base::Time::Now(), 1852 pixel_size); 1853 favicon_sizes.push_back(pixel_size); 1854 } 1855 1856 // A site may have changed the favicons that it uses for |page_url|. 1857 // Example Scenario: 1858 // page_url = news.google.com 1859 // Initial State: www.google.com/favicon.ico 16x16, 32x32 1860 // MergeFavicon(news.google.com, news.google.com/news_specific.ico, ..., 1861 // ..., 16x16) 1862 // 1863 // Difficulties: 1864 // 1. Sync requires that a call to GetFaviconsForURL() returns the 1865 // |bitmap_data| passed into MergeFavicon(). 1866 // - It is invalid for the 16x16 bitmap for www.google.com/favicon.ico to 1867 // stay mapped to news.google.com because it would be unclear which 16x16 1868 // bitmap should be returned via GetFaviconsForURL(). 1869 // 1870 // 2. www.google.com/favicon.ico may be mapped to more than just 1871 // news.google.com (eg www.google.com). 1872 // - The 16x16 bitmap cannot be deleted from www.google.com/favicon.ico 1873 // 1874 // To resolve these problems, we copy all of the favicon bitmaps previously 1875 // mapped to news.google.com (|page_url|) and add them to the favicon at 1876 // news.google.com/news_specific.ico (|icon_url|). The favicon sizes for 1877 // |icon_url| are set to default to indicate that |icon_url| has incomplete 1878 // / incorrect data. 1879 // Difficulty 1: All but news.google.com/news_specific.ico are unmapped from 1880 // news.google.com 1881 // Difficulty 2: The favicon bitmaps for www.google.com/favicon.ico are not 1882 // modified. 1883 1884 std::vector<IconMapping> icon_mappings; 1885 thumbnail_db_->GetIconMappingsForPageURL(page_url, icon_type, &icon_mappings); 1886 1887 // Copy the favicon bitmaps mapped to |page_url| to the favicon at |icon_url| 1888 // till the limit of |kMaxFaviconBitmapsPerIconURL| is reached. 1889 for (size_t i = 0; i < icon_mappings.size(); ++i) { 1890 if (favicon_sizes.size() >= kMaxFaviconBitmapsPerIconURL) 1891 break; 1892 1893 if (icon_mappings[i].icon_url == icon_url) 1894 continue; 1895 1896 std::vector<FaviconBitmap> bitmaps_to_copy; 1897 thumbnail_db_->GetFaviconBitmaps(icon_mappings[i].icon_id, 1898 &bitmaps_to_copy); 1899 for (size_t j = 0; j < bitmaps_to_copy.size(); ++j) { 1900 // Do not add a favicon bitmap at a pixel size for which there is already 1901 // a favicon bitmap mapped to |icon_url|. The one there is more correct 1902 // and having multiple equally sized favicon bitmaps for |page_url| is 1903 // ambiguous in terms of GetFaviconsForURL(). 1904 std::vector<gfx::Size>::iterator it = std::find(favicon_sizes.begin(), 1905 favicon_sizes.end(), bitmaps_to_copy[j].pixel_size); 1906 if (it != favicon_sizes.end()) 1907 continue; 1908 1909 // Add the favicon bitmap as expired as it is not consistent with the 1910 // merged in data. 1911 thumbnail_db_->AddFaviconBitmap(favicon_id, 1912 bitmaps_to_copy[j].bitmap_data, base::Time(), 1913 bitmaps_to_copy[j].pixel_size); 1914 favicon_sizes.push_back(bitmaps_to_copy[j].pixel_size); 1915 1916 if (favicon_sizes.size() >= kMaxFaviconBitmapsPerIconURL) 1917 break; 1918 } 1919 } 1920 1921 // Update the favicon mappings such that only |icon_url| is mapped to 1922 // |page_url|. 1923 bool mapping_changed = false; 1924 if (icon_mappings.size() != 1 || icon_mappings[0].icon_url != icon_url) { 1925 std::vector<favicon_base::FaviconID> favicon_ids; 1926 favicon_ids.push_back(favicon_id); 1927 SetFaviconMappingsForPageAndRedirects(page_url, icon_type, favicon_ids); 1928 mapping_changed = true; 1929 } 1930 1931 if (mapping_changed || !bitmap_identical) 1932 SendFaviconChangedNotificationForPageAndRedirects(page_url); 1933 ScheduleCommit(); 1934} 1935 1936void HistoryBackend::SetFavicons( 1937 const GURL& page_url, 1938 favicon_base::IconType icon_type, 1939 const std::vector<favicon_base::FaviconBitmapData>& favicon_bitmap_data) { 1940 if (!thumbnail_db_ || !db_) 1941 return; 1942 1943 DCHECK(ValidateSetFaviconsParams(favicon_bitmap_data)); 1944 1945 // Build map of FaviconBitmapData for each icon url. 1946 typedef std::map<GURL, std::vector<favicon_base::FaviconBitmapData> > 1947 BitmapDataByIconURL; 1948 BitmapDataByIconURL grouped_by_icon_url; 1949 for (size_t i = 0; i < favicon_bitmap_data.size(); ++i) { 1950 const GURL& icon_url = favicon_bitmap_data[i].icon_url; 1951 grouped_by_icon_url[icon_url].push_back(favicon_bitmap_data[i]); 1952 } 1953 1954 // Track whether the method modifies or creates any favicon bitmaps, favicons 1955 // or icon mappings. 1956 bool data_modified = false; 1957 1958 std::vector<favicon_base::FaviconID> icon_ids; 1959 for (BitmapDataByIconURL::const_iterator it = grouped_by_icon_url.begin(); 1960 it != grouped_by_icon_url.end(); ++it) { 1961 const GURL& icon_url = it->first; 1962 favicon_base::FaviconID icon_id = 1963 thumbnail_db_->GetFaviconIDForFaviconURL(icon_url, icon_type, NULL); 1964 1965 if (!icon_id) { 1966 // TODO(pkotwicz): Remove the favicon sizes attribute from 1967 // ThumbnailDatabase::AddFavicon(). 1968 icon_id = thumbnail_db_->AddFavicon(icon_url, icon_type); 1969 data_modified = true; 1970 } 1971 icon_ids.push_back(icon_id); 1972 1973 if (!data_modified) 1974 SetFaviconBitmaps(icon_id, it->second, &data_modified); 1975 else 1976 SetFaviconBitmaps(icon_id, it->second, NULL); 1977 } 1978 1979 data_modified |= 1980 SetFaviconMappingsForPageAndRedirects(page_url, icon_type, icon_ids); 1981 1982 if (data_modified) { 1983 // Send notification to the UI as an icon mapping, favicon, or favicon 1984 // bitmap was changed by this function. 1985 SendFaviconChangedNotificationForPageAndRedirects(page_url); 1986 } 1987 ScheduleCommit(); 1988} 1989 1990void HistoryBackend::SetFaviconsOutOfDateForPage(const GURL& page_url) { 1991 std::vector<IconMapping> icon_mappings; 1992 1993 if (!thumbnail_db_ || 1994 !thumbnail_db_->GetIconMappingsForPageURL(page_url, 1995 &icon_mappings)) 1996 return; 1997 1998 for (std::vector<IconMapping>::iterator m = icon_mappings.begin(); 1999 m != icon_mappings.end(); ++m) { 2000 thumbnail_db_->SetFaviconOutOfDate(m->icon_id); 2001 } 2002 ScheduleCommit(); 2003} 2004 2005void HistoryBackend::CloneFavicons(const GURL& old_page_url, 2006 const GURL& new_page_url) { 2007 if (!thumbnail_db_) 2008 return; 2009 2010 // Prevent cross-domain cloning. 2011 if (old_page_url.GetOrigin() != new_page_url.GetOrigin()) 2012 return; 2013 2014 thumbnail_db_->CloneIconMappings(old_page_url, new_page_url); 2015 ScheduleCommit(); 2016} 2017 2018void HistoryBackend::SetImportedFavicons( 2019 const std::vector<ImportedFaviconUsage>& favicon_usage) { 2020 if (!db_ || !thumbnail_db_) 2021 return; 2022 2023 Time now = Time::Now(); 2024 2025 // Track all URLs that had their favicons set or updated. 2026 std::set<GURL> favicons_changed; 2027 2028 for (size_t i = 0; i < favicon_usage.size(); i++) { 2029 favicon_base::FaviconID favicon_id = 2030 thumbnail_db_->GetFaviconIDForFaviconURL( 2031 favicon_usage[i].favicon_url, favicon_base::FAVICON, NULL); 2032 if (!favicon_id) { 2033 // This favicon doesn't exist yet, so we create it using the given data. 2034 // TODO(pkotwicz): Pass in real pixel size. 2035 favicon_id = thumbnail_db_->AddFavicon( 2036 favicon_usage[i].favicon_url, 2037 favicon_base::FAVICON, 2038 new base::RefCountedBytes(favicon_usage[i].png_data), 2039 now, 2040 gfx::Size()); 2041 } 2042 2043 // Save the mapping from all the URLs to the favicon. 2044 BookmarkService* bookmark_service = GetBookmarkService(); 2045 for (std::set<GURL>::const_iterator url = favicon_usage[i].urls.begin(); 2046 url != favicon_usage[i].urls.end(); ++url) { 2047 URLRow url_row; 2048 if (!db_->GetRowForURL(*url, &url_row)) { 2049 // If the URL is present as a bookmark, add the url in history to 2050 // save the favicon mapping. This will match with what history db does 2051 // for regular bookmarked URLs with favicons - when history db is 2052 // cleaned, we keep an entry in the db with 0 visits as long as that 2053 // url is bookmarked. 2054 if (bookmark_service && bookmark_service_->IsBookmarked(*url)) { 2055 URLRow url_info(*url); 2056 url_info.set_visit_count(0); 2057 url_info.set_typed_count(0); 2058 url_info.set_last_visit(base::Time()); 2059 url_info.set_hidden(false); 2060 db_->AddURL(url_info); 2061 thumbnail_db_->AddIconMapping(*url, favicon_id); 2062 favicons_changed.insert(*url); 2063 } 2064 } else { 2065 if (!thumbnail_db_->GetIconMappingsForPageURL( 2066 *url, favicon_base::FAVICON, NULL)) { 2067 // URL is present in history, update the favicon *only* if it is not 2068 // set already. 2069 thumbnail_db_->AddIconMapping(*url, favicon_id); 2070 favicons_changed.insert(*url); 2071 } 2072 } 2073 } 2074 } 2075 2076 if (!favicons_changed.empty()) { 2077 // Send the notification about the changed favicon URLs. 2078 scoped_ptr<FaviconChangedDetails> changed_details( 2079 new FaviconChangedDetails); 2080 changed_details->urls.swap(favicons_changed); 2081 BroadcastNotifications(chrome::NOTIFICATION_FAVICON_CHANGED, 2082 changed_details.PassAs<HistoryDetails>()); 2083 } 2084} 2085 2086void HistoryBackend::UpdateFaviconMappingsAndFetchImpl( 2087 const GURL* page_url, 2088 const std::vector<GURL>& icon_urls, 2089 int icon_types, 2090 int desired_size_in_dip, 2091 const std::vector<ui::ScaleFactor>& desired_scale_factors, 2092 std::vector<favicon_base::FaviconBitmapResult>* bitmap_results) { 2093 // If |page_url| is specified, |icon_types| must be either a single icon 2094 // type or icon types which are equivalent. 2095 DCHECK(!page_url || icon_types == favicon_base::FAVICON || 2096 icon_types == favicon_base::TOUCH_ICON || 2097 icon_types == favicon_base::TOUCH_PRECOMPOSED_ICON || 2098 icon_types == 2099 (favicon_base::TOUCH_ICON | favicon_base::TOUCH_PRECOMPOSED_ICON)); 2100 bitmap_results->clear(); 2101 2102 if (!thumbnail_db_) { 2103 return; 2104 } 2105 2106 std::vector<favicon_base::FaviconID> favicon_ids; 2107 2108 // The icon type for which the mappings will the updated and data will be 2109 // returned. 2110 favicon_base::IconType selected_icon_type = favicon_base::INVALID_ICON; 2111 2112 for (size_t i = 0; i < icon_urls.size(); ++i) { 2113 const GURL& icon_url = icon_urls[i]; 2114 favicon_base::IconType icon_type_out; 2115 const favicon_base::FaviconID favicon_id = 2116 thumbnail_db_->GetFaviconIDForFaviconURL( 2117 icon_url, icon_types, &icon_type_out); 2118 2119 if (favicon_id) { 2120 // Return and update icon mappings only for the largest icon type. As 2121 // |icon_urls| is not sorted in terms of icon type, clear |favicon_ids| 2122 // if an |icon_url| with a larger icon type is found. 2123 if (icon_type_out > selected_icon_type) { 2124 selected_icon_type = icon_type_out; 2125 favicon_ids.clear(); 2126 } 2127 if (icon_type_out == selected_icon_type) 2128 favicon_ids.push_back(favicon_id); 2129 } 2130 } 2131 2132 if (page_url && !favicon_ids.empty()) { 2133 bool mappings_updated = 2134 SetFaviconMappingsForPageAndRedirects(*page_url, selected_icon_type, 2135 favicon_ids); 2136 if (mappings_updated) { 2137 SendFaviconChangedNotificationForPageAndRedirects(*page_url); 2138 ScheduleCommit(); 2139 } 2140 } 2141 2142 GetFaviconBitmapResultsForBestMatch(favicon_ids, desired_size_in_dip, 2143 desired_scale_factors, bitmap_results); 2144} 2145 2146void HistoryBackend::SetFaviconBitmaps( 2147 favicon_base::FaviconID icon_id, 2148 const std::vector<favicon_base::FaviconBitmapData>& favicon_bitmap_data, 2149 bool* favicon_bitmaps_changed) { 2150 if (favicon_bitmaps_changed) 2151 *favicon_bitmaps_changed = false; 2152 2153 std::vector<FaviconBitmapIDSize> bitmap_id_sizes; 2154 thumbnail_db_->GetFaviconBitmapIDSizes(icon_id, &bitmap_id_sizes); 2155 2156 std::vector<favicon_base::FaviconBitmapData> to_add = favicon_bitmap_data; 2157 2158 for (size_t i = 0; i < bitmap_id_sizes.size(); ++i) { 2159 const gfx::Size& pixel_size = bitmap_id_sizes[i].pixel_size; 2160 std::vector<favicon_base::FaviconBitmapData>::iterator match_it = 2161 to_add.end(); 2162 for (std::vector<favicon_base::FaviconBitmapData>::iterator it = 2163 to_add.begin(); 2164 it != to_add.end(); 2165 ++it) { 2166 if (it->pixel_size == pixel_size) { 2167 match_it = it; 2168 break; 2169 } 2170 } 2171 2172 FaviconBitmapID bitmap_id = bitmap_id_sizes[i].bitmap_id; 2173 if (match_it == to_add.end()) { 2174 thumbnail_db_->DeleteFaviconBitmap(bitmap_id); 2175 2176 if (favicon_bitmaps_changed) 2177 *favicon_bitmaps_changed = true; 2178 } else { 2179 if (favicon_bitmaps_changed && 2180 !*favicon_bitmaps_changed && 2181 IsFaviconBitmapDataEqual(bitmap_id, match_it->bitmap_data)) { 2182 thumbnail_db_->SetFaviconBitmapLastUpdateTime( 2183 bitmap_id, base::Time::Now()); 2184 } else { 2185 thumbnail_db_->SetFaviconBitmap(bitmap_id, match_it->bitmap_data, 2186 base::Time::Now()); 2187 2188 if (favicon_bitmaps_changed) 2189 *favicon_bitmaps_changed = true; 2190 } 2191 to_add.erase(match_it); 2192 } 2193 } 2194 2195 for (size_t i = 0; i < to_add.size(); ++i) { 2196 thumbnail_db_->AddFaviconBitmap(icon_id, to_add[i].bitmap_data, 2197 base::Time::Now(), to_add[i].pixel_size); 2198 2199 if (favicon_bitmaps_changed) 2200 *favicon_bitmaps_changed = true; 2201 } 2202} 2203 2204bool HistoryBackend::ValidateSetFaviconsParams(const std::vector< 2205 favicon_base::FaviconBitmapData>& favicon_bitmap_data) const { 2206 typedef std::map<GURL, size_t> BitmapsPerIconURL; 2207 BitmapsPerIconURL num_bitmaps_per_icon_url; 2208 for (size_t i = 0; i < favicon_bitmap_data.size(); ++i) { 2209 if (!favicon_bitmap_data[i].bitmap_data.get()) 2210 return false; 2211 2212 const GURL& icon_url = favicon_bitmap_data[i].icon_url; 2213 if (!num_bitmaps_per_icon_url.count(icon_url)) 2214 num_bitmaps_per_icon_url[icon_url] = 1u; 2215 else 2216 ++num_bitmaps_per_icon_url[icon_url]; 2217 } 2218 2219 if (num_bitmaps_per_icon_url.size() > kMaxFaviconsPerPage) 2220 return false; 2221 2222 for (BitmapsPerIconURL::const_iterator it = num_bitmaps_per_icon_url.begin(); 2223 it != num_bitmaps_per_icon_url.end(); ++it) { 2224 if (it->second > kMaxFaviconBitmapsPerIconURL) 2225 return false; 2226 } 2227 return true; 2228} 2229 2230bool HistoryBackend::IsFaviconBitmapDataEqual( 2231 FaviconBitmapID bitmap_id, 2232 const scoped_refptr<base::RefCountedMemory>& new_bitmap_data) { 2233 if (!new_bitmap_data.get()) 2234 return false; 2235 2236 scoped_refptr<base::RefCountedMemory> original_bitmap_data; 2237 thumbnail_db_->GetFaviconBitmap(bitmap_id, 2238 NULL, 2239 &original_bitmap_data, 2240 NULL); 2241 return new_bitmap_data->Equals(original_bitmap_data); 2242} 2243 2244bool HistoryBackend::GetFaviconsFromDB( 2245 const GURL& page_url, 2246 int icon_types, 2247 int desired_size_in_dip, 2248 const std::vector<ui::ScaleFactor>& desired_scale_factors, 2249 std::vector<favicon_base::FaviconBitmapResult>* favicon_bitmap_results) { 2250 DCHECK(favicon_bitmap_results); 2251 favicon_bitmap_results->clear(); 2252 2253 if (!db_ || !thumbnail_db_) 2254 return false; 2255 2256 // Time the query. 2257 TimeTicks beginning_time = TimeTicks::Now(); 2258 2259 // Get FaviconIDs for |page_url| and one of |icon_types|. 2260 std::vector<IconMapping> icon_mappings; 2261 thumbnail_db_->GetIconMappingsForPageURL(page_url, icon_types, 2262 &icon_mappings); 2263 std::vector<favicon_base::FaviconID> favicon_ids; 2264 for (size_t i = 0; i < icon_mappings.size(); ++i) 2265 favicon_ids.push_back(icon_mappings[i].icon_id); 2266 2267 // Populate |favicon_bitmap_results| and |icon_url_sizes|. 2268 bool success = GetFaviconBitmapResultsForBestMatch(favicon_ids, 2269 desired_size_in_dip, desired_scale_factors, favicon_bitmap_results); 2270 UMA_HISTOGRAM_TIMES("History.GetFavIconFromDB", // historical name 2271 TimeTicks::Now() - beginning_time); 2272 return success && !favicon_bitmap_results->empty(); 2273} 2274 2275bool HistoryBackend::GetFaviconBitmapResultsForBestMatch( 2276 const std::vector<favicon_base::FaviconID>& candidate_favicon_ids, 2277 int desired_size_in_dip, 2278 const std::vector<ui::ScaleFactor>& desired_scale_factors, 2279 std::vector<favicon_base::FaviconBitmapResult>* favicon_bitmap_results) { 2280 favicon_bitmap_results->clear(); 2281 2282 if (candidate_favicon_ids.empty()) 2283 return true; 2284 2285 // Find the FaviconID and the FaviconBitmapIDs which best match 2286 // |desired_size_in_dip| and |desired_scale_factors|. 2287 // TODO(pkotwicz): Select bitmap results from multiple favicons once 2288 // content::FaviconStatus supports multiple icon URLs. 2289 favicon_base::FaviconID best_favicon_id = 0; 2290 std::vector<FaviconBitmapID> best_bitmap_ids; 2291 float highest_score = kSelectFaviconFramesInvalidScore; 2292 for (size_t i = 0; i < candidate_favicon_ids.size(); ++i) { 2293 std::vector<FaviconBitmapIDSize> bitmap_id_sizes; 2294 thumbnail_db_->GetFaviconBitmapIDSizes(candidate_favicon_ids[i], 2295 &bitmap_id_sizes); 2296 2297 // Build vector of gfx::Size from |bitmap_id_sizes|. 2298 std::vector<gfx::Size> sizes; 2299 for (size_t j = 0; j < bitmap_id_sizes.size(); ++j) 2300 sizes.push_back(bitmap_id_sizes[j].pixel_size); 2301 2302 std::vector<size_t> candidate_bitmap_indices; 2303 float score = 0; 2304 SelectFaviconFrameIndices(sizes, 2305 desired_scale_factors, 2306 desired_size_in_dip, 2307 &candidate_bitmap_indices, 2308 &score); 2309 if (score > highest_score) { 2310 highest_score = score; 2311 best_favicon_id = candidate_favicon_ids[i], 2312 best_bitmap_ids.clear(); 2313 for (size_t j = 0; j < candidate_bitmap_indices.size(); ++j) { 2314 size_t candidate_index = candidate_bitmap_indices[j]; 2315 best_bitmap_ids.push_back( 2316 bitmap_id_sizes[candidate_index].bitmap_id); 2317 } 2318 } 2319 } 2320 2321 // Construct FaviconBitmapResults from |best_favicon_id| and 2322 // |best_bitmap_ids|. 2323 GURL icon_url; 2324 favicon_base::IconType icon_type; 2325 if (!thumbnail_db_->GetFaviconHeader(best_favicon_id, &icon_url, 2326 &icon_type)) { 2327 return false; 2328 } 2329 2330 for (size_t i = 0; i < best_bitmap_ids.size(); ++i) { 2331 base::Time last_updated; 2332 favicon_base::FaviconBitmapResult bitmap_result; 2333 bitmap_result.icon_url = icon_url; 2334 bitmap_result.icon_type = icon_type; 2335 if (!thumbnail_db_->GetFaviconBitmap(best_bitmap_ids[i], 2336 &last_updated, 2337 &bitmap_result.bitmap_data, 2338 &bitmap_result.pixel_size)) { 2339 return false; 2340 } 2341 2342 bitmap_result.expired = (Time::Now() - last_updated) > 2343 TimeDelta::FromDays(kFaviconRefetchDays); 2344 if (bitmap_result.is_valid()) 2345 favicon_bitmap_results->push_back(bitmap_result); 2346 } 2347 return true; 2348} 2349 2350bool HistoryBackend::SetFaviconMappingsForPageAndRedirects( 2351 const GURL& page_url, 2352 favicon_base::IconType icon_type, 2353 const std::vector<favicon_base::FaviconID>& icon_ids) { 2354 if (!thumbnail_db_) 2355 return false; 2356 2357 // Find all the pages whose favicons we should set, we want to set it for 2358 // all the pages in the redirect chain if it redirected. 2359 history::RedirectList redirects; 2360 GetCachedRecentRedirects(page_url, &redirects); 2361 2362 bool mappings_changed = false; 2363 2364 // Save page <-> favicon associations. 2365 for (history::RedirectList::const_iterator i(redirects.begin()); 2366 i != redirects.end(); ++i) { 2367 mappings_changed |= SetFaviconMappingsForPage(*i, icon_type, icon_ids); 2368 } 2369 return mappings_changed; 2370} 2371 2372bool HistoryBackend::SetFaviconMappingsForPage( 2373 const GURL& page_url, 2374 favicon_base::IconType icon_type, 2375 const std::vector<favicon_base::FaviconID>& icon_ids) { 2376 DCHECK_LE(icon_ids.size(), kMaxFaviconsPerPage); 2377 bool mappings_changed = false; 2378 2379 // Two icon types are considered 'equivalent' if one of the icon types is 2380 // TOUCH_ICON and the other is TOUCH_PRECOMPOSED_ICON. 2381 // 2382 // Sets the icon mappings from |page_url| for |icon_type| to the favicons 2383 // with |icon_ids|. Mappings for |page_url| to favicons of type |icon_type| 2384 // whose FaviconID is not in |icon_ids| are removed. All icon mappings for 2385 // |page_url| to favicons of a type equivalent to |icon_type| are removed. 2386 // Remove any favicons which are orphaned as a result of the removal of the 2387 // icon mappings. 2388 2389 std::vector<favicon_base::FaviconID> unmapped_icon_ids = icon_ids; 2390 2391 std::vector<IconMapping> icon_mappings; 2392 thumbnail_db_->GetIconMappingsForPageURL(page_url, &icon_mappings); 2393 2394 for (std::vector<IconMapping>::iterator m = icon_mappings.begin(); 2395 m != icon_mappings.end(); ++m) { 2396 std::vector<favicon_base::FaviconID>::iterator icon_id_it = std::find( 2397 unmapped_icon_ids.begin(), unmapped_icon_ids.end(), m->icon_id); 2398 2399 // If the icon mapping already exists, avoid removing it and adding it back. 2400 if (icon_id_it != unmapped_icon_ids.end()) { 2401 unmapped_icon_ids.erase(icon_id_it); 2402 continue; 2403 } 2404 2405 if ((icon_type == favicon_base::TOUCH_ICON && 2406 m->icon_type == favicon_base::TOUCH_PRECOMPOSED_ICON) || 2407 (icon_type == favicon_base::TOUCH_PRECOMPOSED_ICON && 2408 m->icon_type == favicon_base::TOUCH_ICON) || 2409 (icon_type == m->icon_type)) { 2410 thumbnail_db_->DeleteIconMapping(m->mapping_id); 2411 2412 // Removing the icon mapping may have orphaned the associated favicon so 2413 // we must recheck it. This is not super fast, but this case will get 2414 // triggered rarely, since normally a page will always map to the same 2415 // favicon IDs. It will mostly happen for favicons we import. 2416 if (!thumbnail_db_->HasMappingFor(m->icon_id)) 2417 thumbnail_db_->DeleteFavicon(m->icon_id); 2418 mappings_changed = true; 2419 } 2420 } 2421 2422 for (size_t i = 0; i < unmapped_icon_ids.size(); ++i) { 2423 thumbnail_db_->AddIconMapping(page_url, unmapped_icon_ids[i]); 2424 mappings_changed = true; 2425 } 2426 return mappings_changed; 2427} 2428 2429void HistoryBackend::GetCachedRecentRedirects( 2430 const GURL& page_url, 2431 history::RedirectList* redirect_list) { 2432 RedirectCache::iterator iter = recent_redirects_.Get(page_url); 2433 if (iter != recent_redirects_.end()) { 2434 *redirect_list = iter->second; 2435 2436 // The redirect chain should have the destination URL as the last item. 2437 DCHECK(!redirect_list->empty()); 2438 DCHECK(redirect_list->back() == page_url); 2439 } else { 2440 // No known redirects, construct mock redirect chain containing |page_url|. 2441 redirect_list->push_back(page_url); 2442 } 2443} 2444 2445void HistoryBackend::SendFaviconChangedNotificationForPageAndRedirects( 2446 const GURL& page_url) { 2447 history::RedirectList redirect_list; 2448 GetCachedRecentRedirects(page_url, &redirect_list); 2449 2450 scoped_ptr<FaviconChangedDetails> changed_details(new FaviconChangedDetails); 2451 for (size_t i = 0; i < redirect_list.size(); ++i) 2452 changed_details->urls.insert(redirect_list[i]); 2453 2454 BroadcastNotifications(chrome::NOTIFICATION_FAVICON_CHANGED, 2455 changed_details.PassAs<HistoryDetails>()); 2456} 2457 2458void HistoryBackend::Commit() { 2459 if (!db_) 2460 return; 2461 2462 // Note that a commit may not actually have been scheduled if a caller 2463 // explicitly calls this instead of using ScheduleCommit. Likewise, we 2464 // may reset the flag written by a pending commit. But this is OK! It 2465 // will merely cause extra commits (which is kind of the idea). We 2466 // could optimize more for this case (we may get two extra commits in 2467 // some cases) but it hasn't been important yet. 2468 CancelScheduledCommit(); 2469 2470 db_->CommitTransaction(); 2471 DCHECK(db_->transaction_nesting() == 0) << "Somebody left a transaction open"; 2472 db_->BeginTransaction(); 2473 2474 if (thumbnail_db_) { 2475 thumbnail_db_->CommitTransaction(); 2476 DCHECK(thumbnail_db_->transaction_nesting() == 0) << 2477 "Somebody left a transaction open"; 2478 thumbnail_db_->BeginTransaction(); 2479 } 2480 2481 if (archived_db_) { 2482 archived_db_->CommitTransaction(); 2483 archived_db_->BeginTransaction(); 2484 } 2485} 2486 2487void HistoryBackend::ScheduleCommit() { 2488 if (scheduled_commit_.get()) 2489 return; 2490 scheduled_commit_ = new CommitLaterTask(this); 2491 base::MessageLoop::current()->PostDelayedTask( 2492 FROM_HERE, 2493 base::Bind(&CommitLaterTask::RunCommit, scheduled_commit_.get()), 2494 base::TimeDelta::FromSeconds(kCommitIntervalSeconds)); 2495} 2496 2497void HistoryBackend::CancelScheduledCommit() { 2498 if (scheduled_commit_.get()) { 2499 scheduled_commit_->Cancel(); 2500 scheduled_commit_ = NULL; 2501 } 2502} 2503 2504void HistoryBackend::ProcessDBTaskImpl() { 2505 if (!db_) { 2506 // db went away, release all the refs. 2507 ReleaseDBTasks(); 2508 return; 2509 } 2510 2511 // Remove any canceled tasks. 2512 while (!db_task_requests_.empty() && db_task_requests_.front()->canceled()) { 2513 db_task_requests_.front()->Release(); 2514 db_task_requests_.pop_front(); 2515 } 2516 if (db_task_requests_.empty()) 2517 return; 2518 2519 // Run the first task. 2520 HistoryDBTaskRequest* request = db_task_requests_.front(); 2521 db_task_requests_.pop_front(); 2522 if (request->value->RunOnDBThread(this, db_.get())) { 2523 // The task is done. Notify the callback. 2524 request->ForwardResult(); 2525 // We AddRef'd the request before adding, need to release it now. 2526 request->Release(); 2527 } else { 2528 // Tasks wants to run some more. Schedule it at the end of current tasks. 2529 db_task_requests_.push_back(request); 2530 // And process it after an invoke later. 2531 base::MessageLoop::current()->PostTask( 2532 FROM_HERE, base::Bind(&HistoryBackend::ProcessDBTaskImpl, this)); 2533 } 2534} 2535 2536void HistoryBackend::ReleaseDBTasks() { 2537 for (std::list<HistoryDBTaskRequest*>::iterator i = 2538 db_task_requests_.begin(); i != db_task_requests_.end(); ++i) { 2539 (*i)->Release(); 2540 } 2541 db_task_requests_.clear(); 2542} 2543 2544//////////////////////////////////////////////////////////////////////////////// 2545// 2546// Generic operations 2547// 2548//////////////////////////////////////////////////////////////////////////////// 2549 2550void HistoryBackend::DeleteURLs(const std::vector<GURL>& urls) { 2551 expirer_.DeleteURLs(urls); 2552 2553 db_->GetStartDate(&first_recorded_time_); 2554 // Force a commit, if the user is deleting something for privacy reasons, we 2555 // want to get it on disk ASAP. 2556 Commit(); 2557} 2558 2559void HistoryBackend::DeleteURL(const GURL& url) { 2560 expirer_.DeleteURL(url); 2561 2562 db_->GetStartDate(&first_recorded_time_); 2563 // Force a commit, if the user is deleting something for privacy reasons, we 2564 // want to get it on disk ASAP. 2565 Commit(); 2566} 2567 2568void HistoryBackend::ExpireHistoryBetween( 2569 const std::set<GURL>& restrict_urls, 2570 Time begin_time, 2571 Time end_time) { 2572 if (!db_) 2573 return; 2574 2575 if (begin_time.is_null() && (end_time.is_null() || end_time.is_max()) && 2576 restrict_urls.empty()) { 2577 // Special case deleting all history so it can be faster and to reduce the 2578 // possibility of an information leak. 2579 DeleteAllHistory(); 2580 } else { 2581 // Clearing parts of history, have the expirer do the depend 2582 expirer_.ExpireHistoryBetween(restrict_urls, begin_time, end_time); 2583 2584 // Force a commit, if the user is deleting something for privacy reasons, 2585 // we want to get it on disk ASAP. 2586 Commit(); 2587 } 2588 2589 if (begin_time <= first_recorded_time_) 2590 db_->GetStartDate(&first_recorded_time_); 2591} 2592 2593void HistoryBackend::ExpireHistoryForTimes( 2594 const std::set<base::Time>& times, 2595 base::Time begin_time, base::Time end_time) { 2596 if (times.empty() || !db_) 2597 return; 2598 2599 DCHECK(*times.begin() >= begin_time) 2600 << "Min time is before begin time: " 2601 << times.begin()->ToJsTime() << " v.s. " << begin_time.ToJsTime(); 2602 DCHECK(*times.rbegin() < end_time) 2603 << "Max time is after end time: " 2604 << times.rbegin()->ToJsTime() << " v.s. " << end_time.ToJsTime(); 2605 2606 history::QueryOptions options; 2607 options.begin_time = begin_time; 2608 options.end_time = end_time; 2609 options.duplicate_policy = QueryOptions::KEEP_ALL_DUPLICATES; 2610 QueryResults results; 2611 QueryHistoryBasic(db_.get(), db_.get(), options, &results); 2612 2613 // 1st pass: find URLs that are visited at one of |times|. 2614 std::set<GURL> urls; 2615 for (size_t i = 0; i < results.size(); ++i) { 2616 if (times.count(results[i].visit_time()) > 0) 2617 urls.insert(results[i].url()); 2618 } 2619 if (urls.empty()) 2620 return; 2621 2622 // 2nd pass: collect all visit times of those URLs. 2623 std::vector<base::Time> times_to_expire; 2624 for (size_t i = 0; i < results.size(); ++i) { 2625 if (urls.count(results[i].url())) 2626 times_to_expire.push_back(results[i].visit_time()); 2627 } 2628 2629 // Put the times in reverse chronological order and remove 2630 // duplicates (for expirer_.ExpireHistoryForTimes()). 2631 std::sort(times_to_expire.begin(), times_to_expire.end(), 2632 std::greater<base::Time>()); 2633 times_to_expire.erase( 2634 std::unique(times_to_expire.begin(), times_to_expire.end()), 2635 times_to_expire.end()); 2636 2637 // Expires by times and commit. 2638 DCHECK(!times_to_expire.empty()); 2639 expirer_.ExpireHistoryForTimes(times_to_expire); 2640 Commit(); 2641 2642 DCHECK(times_to_expire.back() >= first_recorded_time_); 2643 // Update |first_recorded_time_| if we expired it. 2644 if (times_to_expire.back() == first_recorded_time_) 2645 db_->GetStartDate(&first_recorded_time_); 2646} 2647 2648void HistoryBackend::ExpireHistory( 2649 const std::vector<history::ExpireHistoryArgs>& expire_list) { 2650 if (db_) { 2651 bool update_first_recorded_time = false; 2652 2653 for (std::vector<history::ExpireHistoryArgs>::const_iterator it = 2654 expire_list.begin(); it != expire_list.end(); ++it) { 2655 expirer_.ExpireHistoryBetween(it->urls, it->begin_time, it->end_time); 2656 2657 if (it->begin_time < first_recorded_time_) 2658 update_first_recorded_time = true; 2659 } 2660 Commit(); 2661 2662 // Update |first_recorded_time_| if any deletion might have affected it. 2663 if (update_first_recorded_time) 2664 db_->GetStartDate(&first_recorded_time_); 2665 } 2666} 2667 2668void HistoryBackend::URLsNoLongerBookmarked(const std::set<GURL>& urls) { 2669 if (!db_) 2670 return; 2671 2672 for (std::set<GURL>::const_iterator i = urls.begin(); i != urls.end(); ++i) { 2673 URLRow url_row; 2674 if (!db_->GetRowForURL(*i, &url_row)) 2675 continue; // The URL isn't in the db; nothing to do. 2676 2677 VisitVector visits; 2678 db_->GetVisitsForURL(url_row.id(), &visits); 2679 2680 if (visits.empty()) 2681 expirer_.DeleteURL(*i); // There are no more visits; nuke the URL. 2682 } 2683} 2684 2685void HistoryBackend::DatabaseErrorCallback(int error, sql::Statement* stmt) { 2686 if (!scheduled_kill_db_ && sql::IsErrorCatastrophic(error)) { 2687 scheduled_kill_db_ = true; 2688 // Don't just do the close/delete here, as we are being called by |db| and 2689 // that seems dangerous. 2690 // TODO(shess): Consider changing KillHistoryDatabase() to use 2691 // RazeAndClose(). Then it can be cleared immediately. 2692 base::MessageLoop::current()->PostTask( 2693 FROM_HERE, 2694 base::Bind(&HistoryBackend::KillHistoryDatabase, this)); 2695 } 2696} 2697 2698void HistoryBackend::KillHistoryDatabase() { 2699 scheduled_kill_db_ = false; 2700 if (!db_) 2701 return; 2702 2703 // Rollback transaction because Raze() cannot be called from within a 2704 // transaction. 2705 db_->RollbackTransaction(); 2706 bool success = db_->Raze(); 2707 UMA_HISTOGRAM_BOOLEAN("History.KillHistoryDatabaseResult", success); 2708 2709#if defined(OS_ANDROID) 2710 // Release AndroidProviderBackend before other objects. 2711 android_provider_backend_.reset(); 2712#endif 2713 2714 // The expirer keeps tabs on the active databases. Tell it about the 2715 // databases which will be closed. 2716 expirer_.SetDatabases(NULL, NULL, NULL); 2717 2718 // Reopen a new transaction for |db_| for the sake of CloseAllDatabases(). 2719 db_->BeginTransaction(); 2720 CloseAllDatabases(); 2721} 2722 2723void HistoryBackend::ProcessDBTask( 2724 scoped_refptr<HistoryDBTaskRequest> request) { 2725 DCHECK(request.get()); 2726 if (request->canceled()) 2727 return; 2728 2729 bool task_scheduled = !db_task_requests_.empty(); 2730 // Make sure we up the refcount of the request. ProcessDBTaskImpl will 2731 // release when done with the task. 2732 request->AddRef(); 2733 db_task_requests_.push_back(request.get()); 2734 if (!task_scheduled) { 2735 // No other tasks are scheduled. Process request now. 2736 ProcessDBTaskImpl(); 2737 } 2738} 2739 2740void HistoryBackend::BroadcastNotifications( 2741 int type, 2742 scoped_ptr<HistoryDetails> details) { 2743 // |delegate_| may be NULL if |this| is in the process of closing (closed by 2744 // HistoryService -> HistoryBackend::Closing(). 2745 if (delegate_) 2746 delegate_->BroadcastNotifications(type, details.Pass()); 2747} 2748 2749void HistoryBackend::NotifySyncURLsModified(URLRows* rows) { 2750 if (typed_url_syncable_service_.get()) 2751 typed_url_syncable_service_->OnUrlsModified(rows); 2752} 2753 2754void HistoryBackend::NotifySyncURLsDeleted(bool all_history, 2755 bool archived, 2756 URLRows* rows) { 2757 if (typed_url_syncable_service_.get()) 2758 typed_url_syncable_service_->OnUrlsDeleted(all_history, archived, rows); 2759} 2760 2761// Deleting -------------------------------------------------------------------- 2762 2763void HistoryBackend::DeleteAllHistory() { 2764 // Our approach to deleting all history is: 2765 // 1. Copy the bookmarks and their dependencies to new tables with temporary 2766 // names. 2767 // 2. Delete the original tables. Since tables can not share pages, we know 2768 // that any data we don't want to keep is now in an unused page. 2769 // 3. Renaming the temporary tables to match the original. 2770 // 4. Vacuuming the database to delete the unused pages. 2771 // 2772 // Since we are likely to have very few bookmarks and their dependencies 2773 // compared to all history, this is also much faster than just deleting from 2774 // the original tables directly. 2775 2776 // Get the bookmarked URLs. 2777 std::vector<BookmarkService::URLAndTitle> starred_urls; 2778 BookmarkService* bookmark_service = GetBookmarkService(); 2779 if (bookmark_service) 2780 bookmark_service_->GetBookmarks(&starred_urls); 2781 2782 URLRows kept_urls; 2783 for (size_t i = 0; i < starred_urls.size(); i++) { 2784 URLRow row; 2785 if (!db_->GetRowForURL(starred_urls[i].url, &row)) 2786 continue; 2787 2788 // Clear the last visit time so when we write these rows they are "clean." 2789 row.set_last_visit(Time()); 2790 row.set_visit_count(0); 2791 row.set_typed_count(0); 2792 kept_urls.push_back(row); 2793 } 2794 2795 // Clear thumbnail and favicon history. The favicons for the given URLs will 2796 // be kept. 2797 if (!ClearAllThumbnailHistory(kept_urls)) { 2798 LOG(ERROR) << "Thumbnail history could not be cleared"; 2799 // We continue in this error case. If the user wants to delete their 2800 // history, we should delete as much as we can. 2801 } 2802 2803 // ClearAllMainHistory will change the IDs of the URLs in kept_urls. 2804 // Therefore, we clear the list afterwards to make sure nobody uses this 2805 // invalid data. 2806 if (!ClearAllMainHistory(kept_urls)) 2807 LOG(ERROR) << "Main history could not be cleared"; 2808 kept_urls.clear(); 2809 2810 // Delete archived history. 2811 if (archived_db_) { 2812 // Close the database and delete the file. 2813 archived_db_.reset(); 2814 base::FilePath archived_file_name = GetArchivedFileName(); 2815 sql::Connection::Delete(archived_file_name); 2816 2817 // Now re-initialize the database (which may fail). 2818 archived_db_.reset(new ArchivedDatabase()); 2819 if (!archived_db_->Init(archived_file_name)) { 2820 LOG(WARNING) << "Could not initialize the archived database."; 2821 archived_db_.reset(); 2822 } else { 2823 // Open our long-running transaction on this database. 2824 archived_db_->BeginTransaction(); 2825 } 2826 } 2827 2828 db_->GetStartDate(&first_recorded_time_); 2829 2830 // Send out the notification that history is cleared. The in-memory database 2831 // will pick this up and clear itself. 2832 scoped_ptr<URLsDeletedDetails> details(new URLsDeletedDetails); 2833 details->all_history = true; 2834 NotifySyncURLsDeleted(true, false, NULL); 2835 BroadcastNotifications(chrome::NOTIFICATION_HISTORY_URLS_DELETED, 2836 details.PassAs<HistoryDetails>()); 2837} 2838 2839bool HistoryBackend::ClearAllThumbnailHistory(const URLRows& kept_urls) { 2840 if (!thumbnail_db_) { 2841 // When we have no reference to the thumbnail database, maybe there was an 2842 // error opening it. In this case, we just try to blow it away to try to 2843 // fix the error if it exists. This may fail, in which case either the 2844 // file doesn't exist or there's no more we can do. 2845 sql::Connection::Delete(GetFaviconsFileName()); 2846 2847 // Older version of the database. 2848 sql::Connection::Delete(GetThumbnailFileName()); 2849 return true; 2850 } 2851 2852 // Urls to retain mappings for. 2853 std::vector<GURL> urls_to_keep; 2854 for (URLRows::const_iterator i = kept_urls.begin(); 2855 i != kept_urls.end(); ++i) { 2856 urls_to_keep.push_back(i->url()); 2857 } 2858 2859 // Isolate from any long-running transaction. 2860 thumbnail_db_->CommitTransaction(); 2861 thumbnail_db_->BeginTransaction(); 2862 2863 // TODO(shess): If this fails, perhaps the database should be razed 2864 // or deleted. 2865 if (!thumbnail_db_->RetainDataForPageUrls(urls_to_keep)) { 2866 thumbnail_db_->RollbackTransaction(); 2867 thumbnail_db_->BeginTransaction(); 2868 return false; 2869 } 2870 2871#if defined(OS_ANDROID) 2872 // TODO (michaelbai): Add the unit test once AndroidProviderBackend is 2873 // avaliable in HistoryBackend. 2874 db_->ClearAndroidURLRows(); 2875#endif 2876 2877 // Vacuum to remove all the pages associated with the dropped tables. There 2878 // must be no transaction open on the table when we do this. We assume that 2879 // our long-running transaction is open, so we complete it and start it again. 2880 DCHECK(thumbnail_db_->transaction_nesting() == 1); 2881 thumbnail_db_->CommitTransaction(); 2882 thumbnail_db_->Vacuum(); 2883 thumbnail_db_->BeginTransaction(); 2884 return true; 2885} 2886 2887bool HistoryBackend::ClearAllMainHistory(const URLRows& kept_urls) { 2888 // Create the duplicate URL table. We will copy the kept URLs into this. 2889 if (!db_->CreateTemporaryURLTable()) 2890 return false; 2891 2892 // Insert the URLs into the temporary table. 2893 for (URLRows::const_iterator i = kept_urls.begin(); i != kept_urls.end(); 2894 ++i) { 2895 db_->AddTemporaryURL(*i); 2896 } 2897 2898 // Replace the original URL table with the temporary one. 2899 if (!db_->CommitTemporaryURLTable()) 2900 return false; 2901 2902 // Delete the old tables and recreate them empty. 2903 db_->RecreateAllTablesButURL(); 2904 2905 // Vacuum to reclaim the space from the dropped tables. This must be done 2906 // when there is no transaction open, and we assume that our long-running 2907 // transaction is currently open. 2908 db_->CommitTransaction(); 2909 db_->Vacuum(); 2910 db_->BeginTransaction(); 2911 db_->GetStartDate(&first_recorded_time_); 2912 2913 return true; 2914} 2915 2916BookmarkService* HistoryBackend::GetBookmarkService() { 2917 if (bookmark_service_) 2918 bookmark_service_->BlockTillLoaded(); 2919 return bookmark_service_; 2920} 2921 2922void HistoryBackend::NotifyVisitObservers(const VisitRow& visit) { 2923 BriefVisitInfo info; 2924 info.url_id = visit.url_id; 2925 info.time = visit.visit_time; 2926 info.transition = visit.transition; 2927 // If we don't have a delegate yet during setup or shutdown, we will drop 2928 // these notifications. 2929 if (delegate_) 2930 delegate_->NotifyVisitDBObserversOnAddVisit(info); 2931} 2932 2933#if defined(OS_ANDROID) 2934void HistoryBackend::PopulateMostVisitedURLMap() { 2935 MostVisitedURLList most_visited_urls; 2936 QueryMostVisitedURLsImpl(kPageVisitStatsMaxTopSites, kSegmentDataRetention, 2937 &most_visited_urls); 2938 2939 DCHECK_LE(most_visited_urls.size(), kPageVisitStatsMaxTopSites); 2940 for (size_t i = 0; i < most_visited_urls.size(); ++i) { 2941 most_visited_urls_map_[most_visited_urls[i].url] = i; 2942 for (size_t j = 0; j < most_visited_urls[i].redirects.size(); ++j) 2943 most_visited_urls_map_[most_visited_urls[i].redirects[j]] = i; 2944 } 2945} 2946 2947void HistoryBackend::RecordTopPageVisitStats(const GURL& url) { 2948 int rank = kPageVisitStatsMaxTopSites; 2949 std::map<GURL, int>::const_iterator it = most_visited_urls_map_.find(url); 2950 if (it != most_visited_urls_map_.end()) 2951 rank = (*it).second; 2952 UMA_HISTOGRAM_ENUMERATION("History.TopSitesVisitsByRank", 2953 rank, kPageVisitStatsMaxTopSites + 1); 2954} 2955#endif 2956 2957} // namespace history 2958