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android / platform / external / chromium_org / 03be8d5 / . / content / browser / indexed_db / indexed_db_backing_store.cc
blob: b60a55f703f95a4eafce45916f6c1f82e8269874 [file] [log] [blame]
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/indexed_db/indexed_db_backing_store.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/format_macros.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/indexed_db/indexed_db_blob_info.h"
#include "content/browser/indexed_db/indexed_db_class_factory.h"
#include "content/browser/indexed_db/indexed_db_database_error.h"
#include "content/browser/indexed_db/indexed_db_leveldb_coding.h"
#include "content/browser/indexed_db/indexed_db_metadata.h"
#include "content/browser/indexed_db/indexed_db_tracing.h"
#include "content/browser/indexed_db/indexed_db_value.h"
#include "content/browser/indexed_db/leveldb/leveldb_comparator.h"
#include "content/browser/indexed_db/leveldb/leveldb_database.h"
#include "content/browser/indexed_db/leveldb/leveldb_factory.h"
#include "content/browser/indexed_db/leveldb/leveldb_iterator.h"
#include "content/browser/indexed_db/leveldb/leveldb_transaction.h"
#include "content/common/indexed_db/indexed_db_key.h"
#include "content/common/indexed_db/indexed_db_key_path.h"
#include "content/common/indexed_db/indexed_db_key_range.h"
#include "content/public/browser/browser_thread.h"
#include "net/url_request/url_request_context.h"
#include "third_party/WebKit/public/platform/WebIDBTypes.h"
#include "third_party/WebKit/public/web/WebSerializedScriptValueVersion.h"
#include "third_party/leveldatabase/env_chromium.h"
#include "webkit/browser/blob/blob_data_handle.h"
#include "webkit/browser/fileapi/file_stream_writer.h"
#include "webkit/browser/fileapi/file_writer_delegate.h"
#include "webkit/browser/fileapi/local_file_stream_writer.h"
#include "webkit/common/database/database_identifier.h"
using base::FilePath;
using base::StringPiece;
using fileapi::FileWriterDelegate;
namespace content {
namespace {
FilePath GetBlobDirectoryName(const FilePath& pathBase, int64 database_id) {
return pathBase.AppendASCII(base::StringPrintf("%" PRIx64, database_id));
}
FilePath GetBlobDirectoryNameForKey(const FilePath& pathBase,
int64 database_id,
int64 key) {
FilePath path = GetBlobDirectoryName(pathBase, database_id);
path = path.AppendASCII(base::StringPrintf(
"%02x", static_cast<int>(key & 0x000000000000ff00) >> 8));
return path;
}
FilePath GetBlobFileNameForKey(const FilePath& pathBase,
int64 database_id,
int64 key) {
FilePath path = GetBlobDirectoryNameForKey(pathBase, database_id, key);
path = path.AppendASCII(base::StringPrintf("%" PRIx64, key));
return path;
}
bool MakeIDBBlobDirectory(const FilePath& pathBase,
int64 database_id,
int64 key) {
FilePath path = GetBlobDirectoryNameForKey(pathBase, database_id, key);
return base::CreateDirectory(path);
}
static std::string ComputeOriginIdentifier(const GURL& origin_url) {
return webkit_database::GetIdentifierFromOrigin(origin_url) + "@1";
}
static base::FilePath ComputeFileName(const GURL& origin_url) {
return base::FilePath()
.AppendASCII(webkit_database::GetIdentifierFromOrigin(origin_url))
.AddExtension(FILE_PATH_LITERAL(".indexeddb.leveldb"));
}
static base::FilePath ComputeBlobPath(const GURL& origin_url) {
return base::FilePath()
.AppendASCII(webkit_database::GetIdentifierFromOrigin(origin_url))
.AddExtension(FILE_PATH_LITERAL(".indexeddb.blob"));
}
static base::FilePath ComputeCorruptionFileName(const GURL& origin_url) {
return ComputeFileName(origin_url)
.Append(FILE_PATH_LITERAL("corruption_info.json"));
}
} // namespace
static const int64 kKeyGeneratorInitialNumber =
1; // From the IndexedDB specification.
enum IndexedDBBackingStoreErrorSource {
// 0 - 2 are no longer used.
FIND_KEY_IN_INDEX = 3,
GET_IDBDATABASE_METADATA,
GET_INDEXES,
GET_KEY_GENERATOR_CURRENT_NUMBER,
GET_OBJECT_STORES,
GET_RECORD,
KEY_EXISTS_IN_OBJECT_STORE,
LOAD_CURRENT_ROW,
SET_UP_METADATA,
GET_PRIMARY_KEY_VIA_INDEX,
KEY_EXISTS_IN_INDEX,
VERSION_EXISTS,
DELETE_OBJECT_STORE,
SET_MAX_OBJECT_STORE_ID,
SET_MAX_INDEX_ID,
GET_NEW_DATABASE_ID,
GET_NEW_VERSION_NUMBER,
CREATE_IDBDATABASE_METADATA,
DELETE_DATABASE,
TRANSACTION_COMMIT_METHOD, // TRANSACTION_COMMIT is a WinNT.h macro
GET_DATABASE_NAMES,
DELETE_INDEX,
CLEAR_OBJECT_STORE,
READ_BLOB_JOURNAL,
DECODE_BLOB_JOURNAL,
GET_BLOB_KEY_GENERATOR_CURRENT_NUMBER,
GET_BLOB_INFO_FOR_RECORD,
INTERNAL_ERROR_MAX,
};
static void RecordInternalError(const char* type,
IndexedDBBackingStoreErrorSource location) {
std::string name;
name.append("WebCore.IndexedDB.BackingStore.").append(type).append("Error");
base::Histogram::FactoryGet(name,
1,
INTERNAL_ERROR_MAX,
INTERNAL_ERROR_MAX + 1,
base::HistogramBase::kUmaTargetedHistogramFlag)
->Add(location);
}
// Use to signal conditions caused by data corruption.
// A macro is used instead of an inline function so that the assert and log
// report the line number.
#define REPORT_ERROR(type, location) \
do { \
LOG(ERROR) << "IndexedDB " type " Error: " #location; \
RecordInternalError(type, location); \
} while (0)
#define INTERNAL_READ_ERROR(location) REPORT_ERROR("Read", location)
#define INTERNAL_CONSISTENCY_ERROR(location) \
REPORT_ERROR("Consistency", location)
#define INTERNAL_WRITE_ERROR(location) REPORT_ERROR("Write", location)
// Use to signal conditions that usually indicate developer error, but
// could be caused by data corruption. A macro is used instead of an
// inline function so that the assert and log report the line number.
// TODO(cmumford): Improve test coverage so that all error conditions are
// "tested" and then delete this macro.
#define REPORT_ERROR_UNTESTED(type, location) \
do { \
LOG(ERROR) << "IndexedDB " type " Error: " #location; \
NOTREACHED(); \
RecordInternalError(type, location); \
} while (0)
#define INTERNAL_READ_ERROR_UNTESTED(location) \
REPORT_ERROR_UNTESTED("Read", location)
#define INTERNAL_CONSISTENCY_ERROR_UNTESTED(location) \
REPORT_ERROR_UNTESTED("Consistency", location)
#define INTERNAL_WRITE_ERROR_UNTESTED(location) \
REPORT_ERROR_UNTESTED("Write", location)
static void PutBool(LevelDBTransaction* transaction,
const StringPiece& key,
bool value) {
std::string buffer;
EncodeBool(value, &buffer);
transaction->Put(key, &buffer);
}
// Was able to use LevelDB to read the data w/o error, but the data read was not
// in the expected format.
static leveldb::Status InternalInconsistencyStatus() {
return leveldb::Status::Corruption("Internal inconsistency");
}
static leveldb::Status InvalidDBKeyStatus() {
return leveldb::Status::InvalidArgument("Invalid database key ID");
}
static leveldb::Status IOErrorStatus() {
return leveldb::Status::IOError("IO Error");
}
template <typename DBOrTransaction>
static leveldb::Status GetInt(DBOrTransaction* db,
const StringPiece& key,
int64* found_int,
bool* found) {
std::string result;
leveldb::Status s = db->Get(key, &result, found);
if (!s.ok())
return s;
if (!*found)
return leveldb::Status::OK();
StringPiece slice(result);
if (DecodeInt(&slice, found_int) && slice.empty())
return s;
return InternalInconsistencyStatus();
}
static void PutInt(LevelDBTransaction* transaction,
const StringPiece& key,
int64 value) {
DCHECK_GE(value, 0);
std::string buffer;
EncodeInt(value, &buffer);
transaction->Put(key, &buffer);
}
template <typename DBOrTransaction>
WARN_UNUSED_RESULT static leveldb::Status GetVarInt(DBOrTransaction* db,
const StringPiece& key,
int64* found_int,
bool* found) {
std::string result;
leveldb::Status s = db->Get(key, &result, found);
if (!s.ok())
return s;
if (!*found)
return leveldb::Status::OK();
StringPiece slice(result);
if (DecodeVarInt(&slice, found_int) && slice.empty())
return s;
return InternalInconsistencyStatus();
}
static void PutVarInt(LevelDBTransaction* transaction,
const StringPiece& key,
int64 value) {
std::string buffer;
EncodeVarInt(value, &buffer);
transaction->Put(key, &buffer);
}
template <typename DBOrTransaction>
WARN_UNUSED_RESULT static leveldb::Status GetString(
DBOrTransaction* db,
const StringPiece& key,
base::string16* found_string,
bool* found) {
std::string result;
*found = false;
leveldb::Status s = db->Get(key, &result, found);
if (!s.ok())
return s;
if (!*found)
return leveldb::Status::OK();
StringPiece slice(result);
if (DecodeString(&slice, found_string) && slice.empty())
return s;
return InternalInconsistencyStatus();
}
static void PutString(LevelDBTransaction* transaction,
const StringPiece& key,
const base::string16& value) {
std::string buffer;
EncodeString(value, &buffer);
transaction->Put(key, &buffer);
}
static void PutIDBKeyPath(LevelDBTransaction* transaction,
const StringPiece& key,
const IndexedDBKeyPath& value) {
std::string buffer;
EncodeIDBKeyPath(value, &buffer);
transaction->Put(key, &buffer);
}
static int CompareKeys(const StringPiece& a, const StringPiece& b) {
return Compare(a, b, false /*index_keys*/);
}
static int CompareIndexKeys(const StringPiece& a, const StringPiece& b) {
return Compare(a, b, true /*index_keys*/);
}
int IndexedDBBackingStore::Comparator::Compare(const StringPiece& a,
const StringPiece& b) const {
return content::Compare(a, b, false /*index_keys*/);
}
const char* IndexedDBBackingStore::Comparator::Name() const {
return "idb_cmp1";
}
// 0 - Initial version.
// 1 - Adds UserIntVersion to DatabaseMetaData.
// 2 - Adds DataVersion to to global metadata.
// 3 - Adds metadata needed for blob support.
static const int64 kLatestKnownSchemaVersion = 3;
WARN_UNUSED_RESULT static bool IsSchemaKnown(LevelDBDatabase* db, bool* known) {
int64 db_schema_version = 0;
bool found = false;
leveldb::Status s =
GetInt(db, SchemaVersionKey::Encode(), &db_schema_version, &found);
if (!s.ok())
return false;
if (!found) {
*known = true;
return true;
}
if (db_schema_version > kLatestKnownSchemaVersion) {
*known = false;
return true;
}
const uint32 latest_known_data_version =
blink::kSerializedScriptValueVersion;
int64 db_data_version = 0;
s = GetInt(db, DataVersionKey::Encode(), &db_data_version, &found);
if (!s.ok())
return false;
if (!found) {
*known = true;
return true;
}
if (db_data_version > latest_known_data_version) {
*known = false;
return true;
}
*known = true;
return true;
}
// TODO(ericu): Move this down into the member section of this file. I'm
// leaving it here for this CL as it's easier to see the diffs in place.
WARN_UNUSED_RESULT leveldb::Status IndexedDBBackingStore::SetUpMetadata() {
const uint32 latest_known_data_version =
blink::kSerializedScriptValueVersion;
const std::string schema_version_key = SchemaVersionKey::Encode();
const std::string data_version_key = DataVersionKey::Encode();
scoped_refptr<LevelDBTransaction> transaction =
IndexedDBClassFactory::Get()->CreateLevelDBTransaction(db_.get());
int64 db_schema_version = 0;
int64 db_data_version = 0;
bool found = false;
leveldb::Status s =
GetInt(transaction.get(), schema_version_key, &db_schema_version, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(SET_UP_METADATA);
return s;
}
if (!found) {
// Initialize new backing store.
db_schema_version = kLatestKnownSchemaVersion;
PutInt(transaction.get(), schema_version_key, db_schema_version);
db_data_version = latest_known_data_version;
PutInt(transaction.get(), data_version_key, db_data_version);
// If a blob directory already exists for this database, blow it away. It's
// leftover from a partially-purged previous generation of data.
if (!base::DeleteFile(blob_path_, true)) {
INTERNAL_WRITE_ERROR_UNTESTED(SET_UP_METADATA);
return IOErrorStatus();
}
} else {
// Upgrade old backing store.
DCHECK_LE(db_schema_version, kLatestKnownSchemaVersion);
if (db_schema_version < 1) {
db_schema_version = 1;
PutInt(transaction.get(), schema_version_key, db_schema_version);
const std::string start_key =
DatabaseNameKey::EncodeMinKeyForOrigin(origin_identifier_);
const std::string stop_key =
DatabaseNameKey::EncodeStopKeyForOrigin(origin_identifier_);
scoped_ptr<LevelDBIterator> it = db_->CreateIterator();
for (s = it->Seek(start_key);
s.ok() && it->IsValid() && CompareKeys(it->Key(), stop_key) < 0;
s = it->Next()) {
int64 database_id = 0;
found = false;
s = GetInt(transaction.get(), it->Key(), &database_id, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(SET_UP_METADATA);
return s;
}
if (!found) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(SET_UP_METADATA);
return InternalInconsistencyStatus();
}
std::string int_version_key = DatabaseMetaDataKey::Encode(
database_id, DatabaseMetaDataKey::USER_INT_VERSION);
PutVarInt(transaction.get(),
int_version_key,
IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION);
}
}
if (s.ok() && db_schema_version < 2) {
db_schema_version = 2;
PutInt(transaction.get(), schema_version_key, db_schema_version);
db_data_version = blink::kSerializedScriptValueVersion;
PutInt(transaction.get(), data_version_key, db_data_version);
}
if (db_schema_version < 3) {
db_schema_version = 3;
if (!base::DeleteFile(blob_path_, true)) {
INTERNAL_WRITE_ERROR_UNTESTED(SET_UP_METADATA);
return IOErrorStatus();
}
}
}
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(SET_UP_METADATA);
return s;
}
// All new values will be written using this serialization version.
found = false;
s = GetInt(transaction.get(), data_version_key, &db_data_version, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(SET_UP_METADATA);
return s;
}
if (!found) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(SET_UP_METADATA);
return InternalInconsistencyStatus();
}
if (db_data_version < latest_known_data_version) {
db_data_version = latest_known_data_version;
PutInt(transaction.get(), data_version_key, db_data_version);
}
DCHECK_EQ(db_schema_version, kLatestKnownSchemaVersion);
DCHECK_EQ(db_data_version, latest_known_data_version);
s = transaction->Commit();
if (!s.ok())
INTERNAL_WRITE_ERROR_UNTESTED(SET_UP_METADATA);
return s;
}
template <typename DBOrTransaction>
WARN_UNUSED_RESULT static leveldb::Status GetMaxObjectStoreId(
DBOrTransaction* db,
int64 database_id,
int64* max_object_store_id) {
const std::string max_object_store_id_key = DatabaseMetaDataKey::Encode(
database_id, DatabaseMetaDataKey::MAX_OBJECT_STORE_ID);
return GetMaxObjectStoreId(db, max_object_store_id_key, max_object_store_id);
}
template <typename DBOrTransaction>
WARN_UNUSED_RESULT static leveldb::Status GetMaxObjectStoreId(
DBOrTransaction* db,
const std::string& max_object_store_id_key,
int64* max_object_store_id) {
*max_object_store_id = -1;
bool found = false;
leveldb::Status s =
GetInt(db, max_object_store_id_key, max_object_store_id, &found);
if (!s.ok())
return s;
if (!found)
*max_object_store_id = 0;
DCHECK_GE(*max_object_store_id, 0);
return s;
}
class DefaultLevelDBFactory : public LevelDBFactory {
public:
DefaultLevelDBFactory() {}
virtual leveldb::Status OpenLevelDB(const base::FilePath& file_name,
const LevelDBComparator* comparator,
scoped_ptr<LevelDBDatabase>* db,
bool* is_disk_full) OVERRIDE {
return LevelDBDatabase::Open(file_name, comparator, db, is_disk_full);
}
virtual leveldb::Status DestroyLevelDB(const base::FilePath& file_name)
OVERRIDE {
return LevelDBDatabase::Destroy(file_name);
}
private:
DISALLOW_COPY_AND_ASSIGN(DefaultLevelDBFactory);
};
static bool GetBlobKeyGeneratorCurrentNumber(
LevelDBTransaction* leveldb_transaction,
int64 database_id,
int64* blob_key_generator_current_number) {
const std::string key_gen_key = DatabaseMetaDataKey::Encode(
database_id, DatabaseMetaDataKey::BLOB_KEY_GENERATOR_CURRENT_NUMBER);
// Default to initial number if not found.
int64 cur_number = DatabaseMetaDataKey::kBlobKeyGeneratorInitialNumber;
std::string data;
bool found = false;
bool ok = leveldb_transaction->Get(key_gen_key, &data, &found).ok();
if (!ok) {
INTERNAL_READ_ERROR_UNTESTED(GET_BLOB_KEY_GENERATOR_CURRENT_NUMBER);
return false;
}
if (found) {
StringPiece slice(data);
if (!DecodeVarInt(&slice, &cur_number) || !slice.empty() ||
!DatabaseMetaDataKey::IsValidBlobKey(cur_number)) {
INTERNAL_READ_ERROR_UNTESTED(GET_BLOB_KEY_GENERATOR_CURRENT_NUMBER);
return false;
}
}
*blob_key_generator_current_number = cur_number;
return true;
}
static bool UpdateBlobKeyGeneratorCurrentNumber(
LevelDBTransaction* leveldb_transaction,
int64 database_id,
int64 blob_key_generator_current_number) {
#ifndef NDEBUG
int64 old_number;
if (!GetBlobKeyGeneratorCurrentNumber(
leveldb_transaction, database_id, &old_number))
return false;
DCHECK_LT(old_number, blob_key_generator_current_number);
#endif
DCHECK(
DatabaseMetaDataKey::IsValidBlobKey(blob_key_generator_current_number));
const std::string key = DatabaseMetaDataKey::Encode(
database_id, DatabaseMetaDataKey::BLOB_KEY_GENERATOR_CURRENT_NUMBER);
PutVarInt(leveldb_transaction, key, blob_key_generator_current_number);
return true;
}
// TODO(ericu): Error recovery. If we persistently can't read the
// blob journal, the safe thing to do is to clear it and leak the blobs,
// though that may be costly. Still, database/directory deletion should always
// clean things up, and we can write an fsck that will do a full correction if
// need be.
template <typename T>
static leveldb::Status GetBlobJournal(const StringPiece& leveldb_key,
T* leveldb_transaction,
BlobJournalType* journal) {
std::string data;
bool found = false;
leveldb::Status s = leveldb_transaction->Get(leveldb_key, &data, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR(READ_BLOB_JOURNAL);
return s;
}
journal->clear();
if (!found || !data.size())
return leveldb::Status::OK();
StringPiece slice(data);
if (!DecodeBlobJournal(&slice, journal)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(DECODE_BLOB_JOURNAL);
s = InternalInconsistencyStatus();
}
return s;
}
static void ClearBlobJournal(LevelDBTransaction* leveldb_transaction,
const std::string& level_db_key) {
leveldb_transaction->Remove(level_db_key);
}
static void UpdatePrimaryJournalWithBlobList(
LevelDBTransaction* leveldb_transaction,
const BlobJournalType& journal) {
const std::string leveldb_key = BlobJournalKey::Encode();
std::string data;
EncodeBlobJournal(journal, &data);
leveldb_transaction->Put(leveldb_key, &data);
}
static void UpdateLiveBlobJournalWithBlobList(
LevelDBTransaction* leveldb_transaction,
const BlobJournalType& journal) {
const std::string leveldb_key = LiveBlobJournalKey::Encode();
std::string data;
EncodeBlobJournal(journal, &data);
leveldb_transaction->Put(leveldb_key, &data);
}
static leveldb::Status MergeBlobsIntoLiveBlobJournal(
LevelDBTransaction* leveldb_transaction,
const BlobJournalType& journal) {
BlobJournalType old_journal;
const std::string key = LiveBlobJournalKey::Encode();
leveldb::Status s = GetBlobJournal(key, leveldb_transaction, &old_journal);
if (!s.ok())
return s;
old_journal.insert(old_journal.end(), journal.begin(), journal.end());
UpdateLiveBlobJournalWithBlobList(leveldb_transaction, old_journal);
return leveldb::Status::OK();
}
static void UpdateBlobJournalWithDatabase(
LevelDBDirectTransaction* leveldb_transaction,
int64 database_id) {
BlobJournalType journal;
journal.push_back(
std::make_pair(database_id, DatabaseMetaDataKey::kAllBlobsKey));
const std::string key = BlobJournalKey::Encode();
std::string data;
EncodeBlobJournal(journal, &data);
leveldb_transaction->Put(key, &data);
}
static leveldb::Status MergeDatabaseIntoLiveBlobJournal(
LevelDBDirectTransaction* leveldb_transaction,
int64 database_id) {
BlobJournalType journal;
const std::string key = LiveBlobJournalKey::Encode();
leveldb::Status s = GetBlobJournal(key, leveldb_transaction, &journal);
if (!s.ok())
return s;
journal.push_back(
std::make_pair(database_id, DatabaseMetaDataKey::kAllBlobsKey));
std::string data;
EncodeBlobJournal(journal, &data);
leveldb_transaction->Put(key, &data);
return leveldb::Status::OK();
}
// Blob Data is encoded as a series of:
// { is_file [bool], key [int64 as varInt],
// type [string-with-length, may be empty],
// (for Blobs only) size [int64 as varInt]
// (for Files only) fileName [string-with-length]
// }
// There is no length field; just read until you run out of data.
static std::string EncodeBlobData(
const std::vector<IndexedDBBlobInfo*>& blob_info) {
std::string ret;
std::vector<IndexedDBBlobInfo*>::const_iterator iter;
for (iter = blob_info.begin(); iter != blob_info.end(); ++iter) {
const IndexedDBBlobInfo& info = **iter;
EncodeBool(info.is_file(), &ret);
EncodeVarInt(info.key(), &ret);
EncodeStringWithLength(info.type(), &ret);
if (info.is_file())
EncodeStringWithLength(info.file_name(), &ret);
else
EncodeVarInt(info.size(), &ret);
}
return ret;
}
static bool DecodeBlobData(const std::string& data,
std::vector<IndexedDBBlobInfo>* output) {
std::vector<IndexedDBBlobInfo> ret;
output->clear();
StringPiece slice(data);
while (!slice.empty()) {
bool is_file;
int64 key;
base::string16 type;
int64 size;
base::string16 file_name;
if (!DecodeBool(&slice, &is_file))
return false;
if (!DecodeVarInt(&slice, &key) ||
!DatabaseMetaDataKey::IsValidBlobKey(key))
return false;
if (!DecodeStringWithLength(&slice, &type))
return false;
if (is_file) {
if (!DecodeStringWithLength(&slice, &file_name))
return false;
ret.push_back(IndexedDBBlobInfo(key, type, file_name));
} else {
if (!DecodeVarInt(&slice, &size) || size < 0)
return false;
ret.push_back(IndexedDBBlobInfo(type, static_cast<uint64>(size), key));
}
}
output->swap(ret);
return true;
}
IndexedDBBackingStore::IndexedDBBackingStore(
IndexedDBFactory* indexed_db_factory,
const GURL& origin_url,
const base::FilePath& blob_path,
net::URLRequestContext* request_context,
scoped_ptr<LevelDBDatabase> db,
scoped_ptr<LevelDBComparator> comparator,
base::SequencedTaskRunner* task_runner)
: indexed_db_factory_(indexed_db_factory),
origin_url_(origin_url),
blob_path_(blob_path),
origin_identifier_(ComputeOriginIdentifier(origin_url)),
request_context_(request_context),
task_runner_(task_runner),
db_(db.Pass()),
comparator_(comparator.Pass()),
active_blob_registry_(this) {
}
IndexedDBBackingStore::~IndexedDBBackingStore() {
if (!blob_path_.empty() && !child_process_ids_granted_.empty()) {
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
std::set<int>::const_iterator iter;
for (iter = child_process_ids_granted_.begin();
iter != child_process_ids_granted_.end();
++iter) {
policy->RevokeAllPermissionsForFile(*iter, blob_path_);
}
}
STLDeleteContainerPairSecondPointers(incognito_blob_map_.begin(),
incognito_blob_map_.end());
// db_'s destructor uses comparator_. The order of destruction is important.
db_.reset();
comparator_.reset();
}
IndexedDBBackingStore::RecordIdentifier::RecordIdentifier(
const std::string& primary_key,
int64 version)
: primary_key_(primary_key), version_(version) {
DCHECK(!primary_key.empty());
}
IndexedDBBackingStore::RecordIdentifier::RecordIdentifier()
: primary_key_(), version_(-1) {}
IndexedDBBackingStore::RecordIdentifier::~RecordIdentifier() {}
IndexedDBBackingStore::Cursor::CursorOptions::CursorOptions() {}
IndexedDBBackingStore::Cursor::CursorOptions::~CursorOptions() {}
enum IndexedDBBackingStoreOpenResult {
INDEXED_DB_BACKING_STORE_OPEN_MEMORY_SUCCESS,
INDEXED_DB_BACKING_STORE_OPEN_SUCCESS,
INDEXED_DB_BACKING_STORE_OPEN_FAILED_DIRECTORY,
INDEXED_DB_BACKING_STORE_OPEN_FAILED_UNKNOWN_SCHEMA,
INDEXED_DB_BACKING_STORE_OPEN_CLEANUP_DESTROY_FAILED,
INDEXED_DB_BACKING_STORE_OPEN_CLEANUP_REOPEN_FAILED,
INDEXED_DB_BACKING_STORE_OPEN_CLEANUP_REOPEN_SUCCESS,
INDEXED_DB_BACKING_STORE_OPEN_FAILED_IO_ERROR_CHECKING_SCHEMA,
INDEXED_DB_BACKING_STORE_OPEN_FAILED_UNKNOWN_ERR,
INDEXED_DB_BACKING_STORE_OPEN_MEMORY_FAILED,
INDEXED_DB_BACKING_STORE_OPEN_ATTEMPT_NON_ASCII,
INDEXED_DB_BACKING_STORE_OPEN_DISK_FULL_DEPRECATED,
INDEXED_DB_BACKING_STORE_OPEN_ORIGIN_TOO_LONG,
INDEXED_DB_BACKING_STORE_OPEN_NO_RECOVERY,
INDEXED_DB_BACKING_STORE_OPEN_FAILED_PRIOR_CORRUPTION,
INDEXED_DB_BACKING_STORE_OPEN_FAILED_CLEANUP_JOURNAL_ERROR,
INDEXED_DB_BACKING_STORE_OPEN_MAX,
};
// static
scoped_refptr<IndexedDBBackingStore> IndexedDBBackingStore::Open(
IndexedDBFactory* indexed_db_factory,
const GURL& origin_url,
const base::FilePath& path_base,
net::URLRequestContext* request_context,
blink::WebIDBDataLoss* data_loss,
std::string* data_loss_message,
bool* disk_full,
base::SequencedTaskRunner* task_runner,
bool clean_journal,
leveldb::Status* status) {
*data_loss = blink::WebIDBDataLossNone;
DefaultLevelDBFactory leveldb_factory;
return IndexedDBBackingStore::Open(indexed_db_factory,
origin_url,
path_base,
request_context,
data_loss,
data_loss_message,
disk_full,
&leveldb_factory,
task_runner,
clean_journal,
status);
}
static std::string OriginToCustomHistogramSuffix(const GURL& origin_url) {
if (origin_url.host() == "docs.google.com")
return ".Docs";
return std::string();
}
static void HistogramOpenStatus(IndexedDBBackingStoreOpenResult result,
const GURL& origin_url) {
UMA_HISTOGRAM_ENUMERATION("WebCore.IndexedDB.BackingStore.OpenStatus",
result,
INDEXED_DB_BACKING_STORE_OPEN_MAX);
const std::string suffix = OriginToCustomHistogramSuffix(origin_url);
// Data from the WebCore.IndexedDB.BackingStore.OpenStatus histogram is used
// to generate a graph. So as not to alter the meaning of that graph,
// continue to collect all stats there (above) but also now collect docs stats
// separately (below).
if (!suffix.empty()) {
base::LinearHistogram::FactoryGet(
"WebCore.IndexedDB.BackingStore.OpenStatus" + suffix,
1,
INDEXED_DB_BACKING_STORE_OPEN_MAX,
INDEXED_DB_BACKING_STORE_OPEN_MAX + 1,
base::HistogramBase::kUmaTargetedHistogramFlag)->Add(result);
}
}
static bool IsPathTooLong(const base::FilePath& leveldb_dir) {
int limit = base::GetMaximumPathComponentLength(leveldb_dir.DirName());
if (limit == -1) {
DLOG(WARNING) << "GetMaximumPathComponentLength returned -1";
// In limited testing, ChromeOS returns 143, other OSes 255.
#if defined(OS_CHROMEOS)
limit = 143;
#else
limit = 255;
#endif
}
size_t component_length = leveldb_dir.BaseName().value().length();
if (component_length > static_cast<uint32_t>(limit)) {
DLOG(WARNING) << "Path component length (" << component_length
<< ") exceeds maximum (" << limit
<< ") allowed by this filesystem.";
const int min = 140;
const int max = 300;
const int num_buckets = 12;
UMA_HISTOGRAM_CUSTOM_COUNTS(
"WebCore.IndexedDB.BackingStore.OverlyLargeOriginLength",
component_length,
min,
max,
num_buckets);
return true;
}
return false;
}
leveldb::Status IndexedDBBackingStore::DestroyBackingStore(
const base::FilePath& path_base,
const GURL& origin_url) {
const base::FilePath file_path =
path_base.Append(ComputeFileName(origin_url));
DefaultLevelDBFactory leveldb_factory;
return leveldb_factory.DestroyLevelDB(file_path);
}
bool IndexedDBBackingStore::ReadCorruptionInfo(const base::FilePath& path_base,
const GURL& origin_url,
std::string* message) {
const base::FilePath info_path =
path_base.Append(ComputeCorruptionFileName(origin_url));
if (IsPathTooLong(info_path))
return false;
const int64 max_json_len = 4096;
int64 file_size(0);
if (!GetFileSize(info_path, &file_size) || file_size > max_json_len)
return false;
if (!file_size) {
NOTREACHED();
return false;
}
base::File file(info_path, base::File::FLAG_OPEN | base::File::FLAG_READ);
bool success = false;
if (file.IsValid()) {
std::vector<char> bytes(file_size);
if (file_size == file.Read(0, &bytes[0], file_size)) {
std::string input_js(&bytes[0], file_size);
base::JSONReader reader;
scoped_ptr<base::Value> val(reader.ReadToValue(input_js));
if (val && val->GetType() == base::Value::TYPE_DICTIONARY) {
base::DictionaryValue* dict_val =
static_cast<base::DictionaryValue*>(val.get());
success = dict_val->GetString("message", message);
}
}
file.Close();
}
base::DeleteFile(info_path, false);
return success;
}
bool IndexedDBBackingStore::RecordCorruptionInfo(
const base::FilePath& path_base,
const GURL& origin_url,
const std::string& message) {
const base::FilePath info_path =
path_base.Append(ComputeCorruptionFileName(origin_url));
if (IsPathTooLong(info_path))
return false;
base::DictionaryValue root_dict;
root_dict.SetString("message", message);
std::string output_js;
base::JSONWriter::Write(&root_dict, &output_js);
base::File file(info_path,
base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
if (!file.IsValid())
return false;
int written = file.Write(0, output_js.c_str(), output_js.length());
return size_t(written) == output_js.length();
}
// static
scoped_refptr<IndexedDBBackingStore> IndexedDBBackingStore::Open(
IndexedDBFactory* indexed_db_factory,
const GURL& origin_url,
const base::FilePath& path_base,
net::URLRequestContext* request_context,
blink::WebIDBDataLoss* data_loss,
std::string* data_loss_message,
bool* is_disk_full,
LevelDBFactory* leveldb_factory,
base::SequencedTaskRunner* task_runner,
bool clean_journal,
leveldb::Status* status) {
IDB_TRACE("IndexedDBBackingStore::Open");
DCHECK(!path_base.empty());
*data_loss = blink::WebIDBDataLossNone;
*data_loss_message = "";
*is_disk_full = false;
*status = leveldb::Status::OK();
scoped_ptr<LevelDBComparator> comparator(new Comparator());
if (!base::IsStringASCII(path_base.AsUTF8Unsafe())) {
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_ATTEMPT_NON_ASCII,
origin_url);
}
if (!base::CreateDirectory(path_base)) {
*status =
leveldb::Status::IOError("Unable to create IndexedDB database path");
LOG(ERROR) << status->ToString() << ": \"" << path_base.AsUTF8Unsafe()
<< "\"";
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_FAILED_DIRECTORY,
origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
const base::FilePath file_path =
path_base.Append(ComputeFileName(origin_url));
const base::FilePath blob_path =
path_base.Append(ComputeBlobPath(origin_url));
if (IsPathTooLong(file_path)) {
*status = leveldb::Status::IOError("File path too long");
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_ORIGIN_TOO_LONG,
origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
scoped_ptr<LevelDBDatabase> db;
*status = leveldb_factory->OpenLevelDB(
file_path, comparator.get(), &db, is_disk_full);
DCHECK(!db == !status->ok());
if (!status->ok()) {
if (leveldb_env::IndicatesDiskFull(*status)) {
*is_disk_full = true;
} else if (leveldb_env::IsCorruption(*status)) {
*data_loss = blink::WebIDBDataLossTotal;
*data_loss_message = leveldb_env::GetCorruptionMessage(*status);
}
}
bool is_schema_known = false;
if (db) {
std::string corruption_message;
if (ReadCorruptionInfo(path_base, origin_url, &corruption_message)) {
LOG(ERROR) << "IndexedDB recovering from a corrupted (and deleted) "
"database.";
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_FAILED_PRIOR_CORRUPTION,
origin_url);
db.reset();
*data_loss = blink::WebIDBDataLossTotal;
*data_loss_message =
"IndexedDB (database was corrupt): " + corruption_message;
} else if (!IsSchemaKnown(db.get(), &is_schema_known)) {
LOG(ERROR) << "IndexedDB had IO error checking schema, treating it as "
"failure to open";
HistogramOpenStatus(
INDEXED_DB_BACKING_STORE_OPEN_FAILED_IO_ERROR_CHECKING_SCHEMA,
origin_url);
db.reset();
*data_loss = blink::WebIDBDataLossTotal;
*data_loss_message = "I/O error checking schema";
} else if (!is_schema_known) {
LOG(ERROR) << "IndexedDB backing store had unknown schema, treating it "
"as failure to open";
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_FAILED_UNKNOWN_SCHEMA,
origin_url);
db.reset();
*data_loss = blink::WebIDBDataLossTotal;
*data_loss_message = "Unknown schema";
}
}
DCHECK(status->ok() || !is_schema_known || leveldb_env::IsIOError(*status) ||
leveldb_env::IsCorruption(*status));
if (db) {
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_SUCCESS, origin_url);
} else if (leveldb_env::IsIOError(*status)) {
LOG(ERROR) << "Unable to open backing store, not trying to recover - "
<< status->ToString();
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_NO_RECOVERY, origin_url);
return scoped_refptr<IndexedDBBackingStore>();
} else {
DCHECK(!is_schema_known || leveldb_env::IsCorruption(*status));
LOG(ERROR) << "IndexedDB backing store open failed, attempting cleanup";
*status = leveldb_factory->DestroyLevelDB(file_path);
if (!status->ok()) {
LOG(ERROR) << "IndexedDB backing store cleanup failed";
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_CLEANUP_DESTROY_FAILED,
origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
LOG(ERROR) << "IndexedDB backing store cleanup succeeded, reopening";
leveldb_factory->OpenLevelDB(file_path, comparator.get(), &db, NULL);
if (!db) {
LOG(ERROR) << "IndexedDB backing store reopen after recovery failed";
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_CLEANUP_REOPEN_FAILED,
origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_CLEANUP_REOPEN_SUCCESS,
origin_url);
}
if (!db) {
NOTREACHED();
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_FAILED_UNKNOWN_ERR,
origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
scoped_refptr<IndexedDBBackingStore> backing_store =
Create(indexed_db_factory,
origin_url,
blob_path,
request_context,
db.Pass(),
comparator.Pass(),
task_runner,
status);
if (clean_journal && backing_store &&
!backing_store->CleanUpBlobJournal(LiveBlobJournalKey::Encode()).ok()) {
HistogramOpenStatus(
INDEXED_DB_BACKING_STORE_OPEN_FAILED_CLEANUP_JOURNAL_ERROR, origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
return backing_store;
}
// static
scoped_refptr<IndexedDBBackingStore> IndexedDBBackingStore::OpenInMemory(
const GURL& origin_url,
base::SequencedTaskRunner* task_runner,
leveldb::Status* status) {
DefaultLevelDBFactory leveldb_factory;
return IndexedDBBackingStore::OpenInMemory(
origin_url, &leveldb_factory, task_runner, status);
}
// static
scoped_refptr<IndexedDBBackingStore> IndexedDBBackingStore::OpenInMemory(
const GURL& origin_url,
LevelDBFactory* leveldb_factory,
base::SequencedTaskRunner* task_runner,
leveldb::Status* status) {
IDB_TRACE("IndexedDBBackingStore::OpenInMemory");
scoped_ptr<LevelDBComparator> comparator(new Comparator());
scoped_ptr<LevelDBDatabase> db =
LevelDBDatabase::OpenInMemory(comparator.get());
if (!db) {
LOG(ERROR) << "LevelDBDatabase::OpenInMemory failed.";
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_MEMORY_FAILED,
origin_url);
return scoped_refptr<IndexedDBBackingStore>();
}
HistogramOpenStatus(INDEXED_DB_BACKING_STORE_OPEN_MEMORY_SUCCESS, origin_url);
return Create(NULL /* indexed_db_factory */,
origin_url,
base::FilePath(),
NULL /* request_context */,
db.Pass(),
comparator.Pass(),
task_runner,
status);
}
// static
scoped_refptr<IndexedDBBackingStore> IndexedDBBackingStore::Create(
IndexedDBFactory* indexed_db_factory,
const GURL& origin_url,
const base::FilePath& blob_path,
net::URLRequestContext* request_context,
scoped_ptr<LevelDBDatabase> db,
scoped_ptr<LevelDBComparator> comparator,
base::SequencedTaskRunner* task_runner,
leveldb::Status* status) {
// TODO(jsbell): Handle comparator name changes.
scoped_refptr<IndexedDBBackingStore> backing_store(
new IndexedDBBackingStore(indexed_db_factory,
origin_url,
blob_path,
request_context,
db.Pass(),
comparator.Pass(),
task_runner));
*status = backing_store->SetUpMetadata();
if (!status->ok())
return scoped_refptr<IndexedDBBackingStore>();
return backing_store;
}
void IndexedDBBackingStore::GrantChildProcessPermissions(int child_process_id) {
if (!child_process_ids_granted_.count(child_process_id)) {
child_process_ids_granted_.insert(child_process_id);
ChildProcessSecurityPolicyImpl::GetInstance()->GrantReadFile(
child_process_id, blob_path_);
}
}
std::vector<base::string16> IndexedDBBackingStore::GetDatabaseNames(
leveldb::Status* s) {
*s = leveldb::Status::OK();
std::vector<base::string16> found_names;
const std::string start_key =
DatabaseNameKey::EncodeMinKeyForOrigin(origin_identifier_);
const std::string stop_key =
DatabaseNameKey::EncodeStopKeyForOrigin(origin_identifier_);
DCHECK(found_names.empty());
scoped_ptr<LevelDBIterator> it = db_->CreateIterator();
for (*s = it->Seek(start_key);
s->ok() && it->IsValid() && CompareKeys(it->Key(), stop_key) < 0;
*s = it->Next()) {
// Decode database name (in iterator key).
StringPiece slice(it->Key());
DatabaseNameKey database_name_key;
if (!DatabaseNameKey::Decode(&slice, &database_name_key) ||
!slice.empty()) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_DATABASE_NAMES);
continue;
}
// Decode database id (in iterator value).
int64 database_id = 0;
StringPiece valueSlice(it->Value());
if (!DecodeInt(&valueSlice, &database_id) || !valueSlice.empty()) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_DATABASE_NAMES);
continue;
}
// Look up version by id.
bool found = false;
int64 database_version = IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION;
*s = GetVarInt(db_.get(),
DatabaseMetaDataKey::Encode(
database_id, DatabaseMetaDataKey::USER_INT_VERSION),
&database_version,
&found);
if (!s->ok() || !found) {
INTERNAL_READ_ERROR_UNTESTED(GET_DATABASE_NAMES);
continue;
}
// Ignore stale metadata from failed initial opens.
if (database_version != IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION)
found_names.push_back(database_name_key.database_name());
}
if (!s->ok())
INTERNAL_READ_ERROR(GET_DATABASE_NAMES);
return found_names;
}
leveldb::Status IndexedDBBackingStore::GetIDBDatabaseMetaData(
const base::string16& name,
IndexedDBDatabaseMetadata* metadata,
bool* found) {
const std::string key = DatabaseNameKey::Encode(origin_identifier_, name);
*found = false;
leveldb::Status s = GetInt(db_.get(), key, &metadata->id, found);
if (!s.ok()) {
INTERNAL_READ_ERROR(GET_IDBDATABASE_METADATA);
return s;
}
if (!*found)
return leveldb::Status::OK();
s = GetString(db_.get(),
DatabaseMetaDataKey::Encode(metadata->id,
DatabaseMetaDataKey::USER_VERSION),
&metadata->version,
found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return s;
}
if (!*found) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return InternalInconsistencyStatus();
}
s = GetVarInt(db_.get(),
DatabaseMetaDataKey::Encode(
metadata->id, DatabaseMetaDataKey::USER_INT_VERSION),
&metadata->int_version,
found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return s;
}
if (!*found) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return InternalInconsistencyStatus();
}
if (metadata->int_version == IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION)
metadata->int_version = IndexedDBDatabaseMetadata::NO_INT_VERSION;
s = GetMaxObjectStoreId(
db_.get(), metadata->id, &metadata->max_object_store_id);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
}
// We don't cache this, we just check it if it's there.
int64 blob_key_generator_current_number =
DatabaseMetaDataKey::kInvalidBlobKey;
s = GetVarInt(
db_.get(),
DatabaseMetaDataKey::Encode(
metadata->id, DatabaseMetaDataKey::BLOB_KEY_GENERATOR_CURRENT_NUMBER),
&blob_key_generator_current_number,
found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return s;
}
if (!*found) {
// This database predates blob support.
*found = true;
} else if (!DatabaseMetaDataKey::IsValidBlobKey(
blob_key_generator_current_number)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return InternalInconsistencyStatus();
}
return s;
}
WARN_UNUSED_RESULT static leveldb::Status GetNewDatabaseId(
LevelDBTransaction* transaction,
int64* new_id) {
*new_id = -1;
int64 max_database_id = -1;
bool found = false;
leveldb::Status s =
GetInt(transaction, MaxDatabaseIdKey::Encode(), &max_database_id, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_NEW_DATABASE_ID);
return s;
}
if (!found)
max_database_id = 0;
DCHECK_GE(max_database_id, 0);
int64 database_id = max_database_id + 1;
PutInt(transaction, MaxDatabaseIdKey::Encode(), database_id);
*new_id = database_id;
return leveldb::Status::OK();
}
leveldb::Status IndexedDBBackingStore::CreateIDBDatabaseMetaData(
const base::string16& name,
const base::string16& version,
int64 int_version,
int64* row_id) {
// TODO(jsbell): Don't persist metadata if open fails. http://crbug.com/395472
scoped_refptr<LevelDBTransaction> transaction =
IndexedDBClassFactory::Get()->CreateLevelDBTransaction(db_.get());
leveldb::Status s = GetNewDatabaseId(transaction.get(), row_id);
if (!s.ok())
return s;
DCHECK_GE(*row_id, 0);
if (int_version == IndexedDBDatabaseMetadata::NO_INT_VERSION)
int_version = IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION;
PutInt(transaction.get(),
DatabaseNameKey::Encode(origin_identifier_, name),
*row_id);
PutString(
transaction.get(),
DatabaseMetaDataKey::Encode(*row_id, DatabaseMetaDataKey::USER_VERSION),
version);
PutVarInt(transaction.get(),
DatabaseMetaDataKey::Encode(*row_id,
DatabaseMetaDataKey::USER_INT_VERSION),
int_version);
PutVarInt(
transaction.get(),
DatabaseMetaDataKey::Encode(
*row_id, DatabaseMetaDataKey::BLOB_KEY_GENERATOR_CURRENT_NUMBER),
DatabaseMetaDataKey::kBlobKeyGeneratorInitialNumber);
s = transaction->Commit();
if (!s.ok())
INTERNAL_WRITE_ERROR_UNTESTED(CREATE_IDBDATABASE_METADATA);
return s;
}
bool IndexedDBBackingStore::UpdateIDBDatabaseIntVersion(
IndexedDBBackingStore::Transaction* transaction,
int64 row_id,
int64 int_version) {
if (int_version == IndexedDBDatabaseMetadata::NO_INT_VERSION)
int_version = IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION;
DCHECK_GE(int_version, 0) << "int_version was " << int_version;
PutVarInt(transaction->transaction(),
DatabaseMetaDataKey::Encode(row_id,
DatabaseMetaDataKey::USER_INT_VERSION),
int_version);
return true;
}
// If you're deleting a range that contains user keys that have blob info, this
// won't clean up the blobs.
static leveldb::Status DeleteRangeBasic(LevelDBTransaction* transaction,
const std::string& begin,
const std::string& end,
bool upper_open) {
scoped_ptr<LevelDBIterator> it = transaction->CreateIterator();
leveldb::Status s;
for (s = it->Seek(begin); s.ok() && it->IsValid() &&
(upper_open ? CompareKeys(it->Key(), end) < 0
: CompareKeys(it->Key(), end) <= 0);
s = it->Next())
transaction->Remove(it->Key());
return s;
}
static leveldb::Status DeleteBlobsInRange(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const std::string& start_key,
const std::string& end_key,
bool upper_open) {
scoped_ptr<LevelDBIterator> it = transaction->transaction()->CreateIterator();
leveldb::Status s = it->Seek(start_key);
for (; s.ok() && it->IsValid() &&
(upper_open ? CompareKeys(it->Key(), end_key) < 0
: CompareKeys(it->Key(), end_key) <= 0);
s = it->Next()) {
StringPiece key_piece(it->Key());
std::string user_key =
BlobEntryKey::ReencodeToObjectStoreDataKey(&key_piece);
if (!user_key.size()) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_IDBDATABASE_METADATA);
return InternalInconsistencyStatus();
}
transaction->PutBlobInfo(
database_id, object_store_id, user_key, NULL, NULL);
}
return s;
}
static leveldb::Status DeleteBlobsInObjectStore(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id) {
std::string start_key, stop_key;
start_key =
BlobEntryKey::EncodeMinKeyForObjectStore(database_id, object_store_id);
stop_key =
BlobEntryKey::EncodeStopKeyForObjectStore(database_id, object_store_id);
return DeleteBlobsInRange(
transaction, database_id, object_store_id, start_key, stop_key, true);
}
leveldb::Status IndexedDBBackingStore::DeleteDatabase(
const base::string16& name) {
IDB_TRACE("IndexedDBBackingStore::DeleteDatabase");
scoped_ptr<LevelDBDirectTransaction> transaction =
LevelDBDirectTransaction::Create(db_.get());
leveldb::Status s;
s = CleanUpBlobJournal(BlobJournalKey::Encode());
if (!s.ok())
return s;
IndexedDBDatabaseMetadata metadata;
bool success = false;
s = GetIDBDatabaseMetaData(name, &metadata, &success);
if (!s.ok())
return s;
if (!success)
return leveldb::Status::OK();
const std::string start_key = DatabaseMetaDataKey::Encode(
metadata.id, DatabaseMetaDataKey::ORIGIN_NAME);
const std::string stop_key = DatabaseMetaDataKey::Encode(
metadata.id + 1, DatabaseMetaDataKey::ORIGIN_NAME);
scoped_ptr<LevelDBIterator> it = db_->CreateIterator();
for (s = it->Seek(start_key);
s.ok() && it->IsValid() && CompareKeys(it->Key(), stop_key) < 0;
s = it->Next())
transaction->Remove(it->Key());
if (!s.ok()) {
INTERNAL_WRITE_ERROR_UNTESTED(DELETE_DATABASE);
return s;
}
const std::string key = DatabaseNameKey::Encode(origin_identifier_, name);
transaction->Remove(key);
bool need_cleanup = false;
if (active_blob_registry()->MarkDeletedCheckIfUsed(
metadata.id, DatabaseMetaDataKey::kAllBlobsKey)) {
s = MergeDatabaseIntoLiveBlobJournal(transaction.get(), metadata.id);
if (!s.ok())
return s;
} else {
UpdateBlobJournalWithDatabase(transaction.get(), metadata.id);
need_cleanup = true;
}
s = transaction->Commit();
if (!s.ok()) {
INTERNAL_WRITE_ERROR_UNTESTED(DELETE_DATABASE);
return s;
}
if (need_cleanup)
CleanUpBlobJournal(BlobJournalKey::Encode());
db_->Compact(start_key, stop_key);
return s;
}
static bool CheckObjectStoreAndMetaDataType(const LevelDBIterator* it,
const std::string& stop_key,
int64 object_store_id,
int64 meta_data_type) {
if (!it->IsValid() || CompareKeys(it->Key(), stop_key) >= 0)
return false;
StringPiece slice(it->Key());
ObjectStoreMetaDataKey meta_data_key;
bool ok =
ObjectStoreMetaDataKey::Decode(&slice, &meta_data_key) && slice.empty();
DCHECK(ok);
if (meta_data_key.ObjectStoreId() != object_store_id)
return false;
if (meta_data_key.MetaDataType() != meta_data_type)
return false;
return ok;
}
// TODO(jsbell): This should do some error handling rather than
// plowing ahead when bad data is encountered.
leveldb::Status IndexedDBBackingStore::GetObjectStores(
int64 database_id,
IndexedDBDatabaseMetadata::ObjectStoreMap* object_stores) {
IDB_TRACE("IndexedDBBackingStore::GetObjectStores");
if (!KeyPrefix::IsValidDatabaseId(database_id))
return InvalidDBKeyStatus();
const std::string start_key =
ObjectStoreMetaDataKey::Encode(database_id, 1, 0);
const std::string stop_key =
ObjectStoreMetaDataKey::EncodeMaxKey(database_id);
DCHECK(object_stores->empty());
scoped_ptr<LevelDBIterator> it = db_->CreateIterator();
leveldb::Status s = it->Seek(start_key);
while (s.ok() && it->IsValid() && CompareKeys(it->Key(), stop_key) < 0) {
StringPiece slice(it->Key());
ObjectStoreMetaDataKey meta_data_key;
bool ok =
ObjectStoreMetaDataKey::Decode(&slice, &meta_data_key) && slice.empty();
DCHECK(ok);
if (!ok || meta_data_key.MetaDataType() != ObjectStoreMetaDataKey::NAME) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
// Possible stale metadata, but don't fail the load.
s = it->Next();
if (!s.ok())
break;
continue;
}
int64 object_store_id = meta_data_key.ObjectStoreId();
// TODO(jsbell): Do this by direct key lookup rather than iteration, to
// simplify.
base::string16 object_store_name;
{
StringPiece slice(it->Value());
if (!DecodeString(&slice, &object_store_name) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
}
s = it->Next();
if (!s.ok())
break;
if (!CheckObjectStoreAndMetaDataType(it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::KEY_PATH)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
break;
}
IndexedDBKeyPath key_path;
{
StringPiece slice(it->Value());
if (!DecodeIDBKeyPath(&slice, &key_path) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
}
s = it->Next();
if (!s.ok())
break;
if (!CheckObjectStoreAndMetaDataType(
it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::AUTO_INCREMENT)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
break;
}
bool auto_increment;
{
StringPiece slice(it->Value());
if (!DecodeBool(&slice, &auto_increment) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
}
s = it->Next(); // Is evictable.
if (!s.ok())
break;
if (!CheckObjectStoreAndMetaDataType(it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::EVICTABLE)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
break;
}
s = it->Next(); // Last version.
if (!s.ok())
break;
if (!CheckObjectStoreAndMetaDataType(
it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::LAST_VERSION)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
break;
}
s = it->Next(); // Maximum index id allocated.
if (!s.ok())
break;
if (!CheckObjectStoreAndMetaDataType(
it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::MAX_INDEX_ID)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
break;
}
int64 max_index_id;
{
StringPiece slice(it->Value());
if (!DecodeInt(&slice, &max_index_id) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
}
s = it->Next(); // [optional] has key path (is not null)
if (!s.ok())
break;
if (CheckObjectStoreAndMetaDataType(it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::HAS_KEY_PATH)) {
bool has_key_path;
{
StringPiece slice(it->Value());
if (!DecodeBool(&slice, &has_key_path))
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
}
// This check accounts for two layers of legacy coding:
// (1) Initially, has_key_path was added to distinguish null vs. string.
// (2) Later, null vs. string vs. array was stored in the key_path itself.
// So this check is only relevant for string-type key_paths.
if (!has_key_path &&
(key_path.type() == blink::WebIDBKeyPathTypeString &&
!key_path.string().empty())) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
break;
}
if (!has_key_path)
key_path = IndexedDBKeyPath();
s = it->Next();
if (!s.ok())
break;
}
int64 key_generator_current_number = -1;
if (CheckObjectStoreAndMetaDataType(
it.get(),
stop_key,
object_store_id,
ObjectStoreMetaDataKey::KEY_GENERATOR_CURRENT_NUMBER)) {
StringPiece slice(it->Value());
if (!DecodeInt(&slice, &key_generator_current_number) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_OBJECT_STORES);
// TODO(jsbell): Return key_generator_current_number, cache in
// object store, and write lazily to backing store. For now,
// just assert that if it was written it was valid.
DCHECK_GE(key_generator_current_number, kKeyGeneratorInitialNumber);
s = it->Next();
if (!s.ok())
break;
}
IndexedDBObjectStoreMetadata metadata(object_store_name,
object_store_id,
key_path,
auto_increment,
max_index_id);
s = GetIndexes(database_id, object_store_id, &metadata.indexes);
if (!s.ok())
break;
(*object_stores)[object_store_id] = metadata;
}
if (!s.ok())
INTERNAL_READ_ERROR_UNTESTED(GET_OBJECT_STORES);
return s;
}
WARN_UNUSED_RESULT static leveldb::Status SetMaxObjectStoreId(
LevelDBTransaction* transaction,
int64 database_id,
int64 object_store_id) {
const std::string max_object_store_id_key = DatabaseMetaDataKey::Encode(
database_id, DatabaseMetaDataKey::MAX_OBJECT_STORE_ID);
int64 max_object_store_id = -1;
leveldb::Status s = GetMaxObjectStoreId(
transaction, max_object_store_id_key, &max_object_store_id);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(SET_MAX_OBJECT_STORE_ID);
return s;
}
if (object_store_id <= max_object_store_id) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(SET_MAX_OBJECT_STORE_ID);
return InternalInconsistencyStatus();
}
PutInt(transaction, max_object_store_id_key, object_store_id);
return s;
}
void IndexedDBBackingStore::Compact() { db_->CompactAll(); }
leveldb::Status IndexedDBBackingStore::CreateObjectStore(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const base::string16& name,
const IndexedDBKeyPath& key_path,
bool auto_increment) {
IDB_TRACE("IndexedDBBackingStore::CreateObjectStore");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
leveldb::Status s =
SetMaxObjectStoreId(leveldb_transaction, database_id, object_store_id);
if (!s.ok())
return s;
const std::string name_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::NAME);
const std::string key_path_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::KEY_PATH);
const std::string auto_increment_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::AUTO_INCREMENT);
const std::string evictable_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::EVICTABLE);
const std::string last_version_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::LAST_VERSION);
const std::string max_index_id_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::MAX_INDEX_ID);
const std::string has_key_path_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::HAS_KEY_PATH);
const std::string key_generator_current_number_key =
ObjectStoreMetaDataKey::Encode(
database_id,
object_store_id,
ObjectStoreMetaDataKey::KEY_GENERATOR_CURRENT_NUMBER);
const std::string names_key = ObjectStoreNamesKey::Encode(database_id, name);
PutString(leveldb_transaction, name_key, name);
PutIDBKeyPath(leveldb_transaction, key_path_key, key_path);
PutInt(leveldb_transaction, auto_increment_key, auto_increment);
PutInt(leveldb_transaction, evictable_key, false);
PutInt(leveldb_transaction, last_version_key, 1);
PutInt(leveldb_transaction, max_index_id_key, kMinimumIndexId);
PutBool(leveldb_transaction, has_key_path_key, !key_path.IsNull());
PutInt(leveldb_transaction,
key_generator_current_number_key,
kKeyGeneratorInitialNumber);
PutInt(leveldb_transaction, names_key, object_store_id);
return s;
}
leveldb::Status IndexedDBBackingStore::DeleteObjectStore(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id) {
IDB_TRACE("IndexedDBBackingStore::DeleteObjectStore");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
base::string16 object_store_name;
bool found = false;
leveldb::Status s =
GetString(leveldb_transaction,
ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::NAME),
&object_store_name,
&found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(DELETE_OBJECT_STORE);
return s;
}
if (!found) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(DELETE_OBJECT_STORE);
return InternalInconsistencyStatus();
}
s = DeleteBlobsInObjectStore(transaction, database_id, object_store_id);
if (!s.ok()) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(DELETE_OBJECT_STORE);
return s;
}
s = DeleteRangeBasic(
leveldb_transaction,
ObjectStoreMetaDataKey::Encode(database_id, object_store_id, 0),
ObjectStoreMetaDataKey::EncodeMaxKey(database_id, object_store_id),
true);
if (s.ok()) {
leveldb_transaction->Remove(
ObjectStoreNamesKey::Encode(database_id, object_store_name));
s = DeleteRangeBasic(
leveldb_transaction,
IndexFreeListKey::Encode(database_id, object_store_id, 0),
IndexFreeListKey::EncodeMaxKey(database_id, object_store_id),
true);
}
if (s.ok()) {
s = DeleteRangeBasic(
leveldb_transaction,
IndexMetaDataKey::Encode(database_id, object_store_id, 0, 0),
IndexMetaDataKey::EncodeMaxKey(database_id, object_store_id),
true);
}
if (!s.ok()) {
INTERNAL_WRITE_ERROR_UNTESTED(DELETE_OBJECT_STORE);
return s;
}
return ClearObjectStore(transaction, database_id, object_store_id);
}
leveldb::Status IndexedDBBackingStore::GetRecord(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKey& key,
IndexedDBValue* record) {
IDB_TRACE("IndexedDBBackingStore::GetRecord");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
const std::string leveldb_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, key);
std::string data;
record->clear();
bool found = false;
leveldb::Status s = leveldb_transaction->Get(leveldb_key, &data, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR(GET_RECORD);
return s;
}
if (!found)
return s;
if (data.empty()) {
INTERNAL_READ_ERROR_UNTESTED(GET_RECORD);
return leveldb::Status::NotFound("Record contained no data");
}
int64 version;
StringPiece slice(data);
if (!DecodeVarInt(&slice, &version)) {
INTERNAL_READ_ERROR_UNTESTED(GET_RECORD);
return InternalInconsistencyStatus();
}
record->bits = slice.as_string();
return transaction->GetBlobInfoForRecord(database_id, leveldb_key, record);
}
WARN_UNUSED_RESULT static leveldb::Status GetNewVersionNumber(
LevelDBTransaction* transaction,
int64 database_id,
int64 object_store_id,
int64* new_version_number) {
const std::string last_version_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::LAST_VERSION);
*new_version_number = -1;
int64 last_version = -1;
bool found = false;
leveldb::Status s =
GetInt(transaction, last_version_key, &last_version, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_NEW_VERSION_NUMBER);
return s;
}
if (!found)
last_version = 0;
DCHECK_GE(last_version, 0);
int64 version = last_version + 1;
PutInt(transaction, last_version_key, version);
// TODO(jsbell): Think about how we want to handle the overflow scenario.
DCHECK(version > last_version);
*new_version_number = version;
return s;
}
leveldb::Status IndexedDBBackingStore::PutRecord(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKey& key,
IndexedDBValue* value,
ScopedVector<webkit_blob::BlobDataHandle>* handles,
RecordIdentifier* record_identifier) {
IDB_TRACE("IndexedDBBackingStore::PutRecord");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
DCHECK(key.IsValid());
LevelDBTransaction* leveldb_transaction = transaction->transaction();
int64 version = -1;
leveldb::Status s = GetNewVersionNumber(
leveldb_transaction, database_id, object_store_id, &version);
if (!s.ok())
return s;
DCHECK_GE(version, 0);
const std::string object_store_data_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, key);
std::string v;
EncodeVarInt(version, &v);
v.append(value->bits);
leveldb_transaction->Put(object_store_data_key, &v);
s = transaction->PutBlobInfoIfNeeded(database_id,
object_store_id,
object_store_data_key,
&value->blob_info,
handles);
if (!s.ok())
return s;
DCHECK(!handles->size());
const std::string exists_entry_key =
ExistsEntryKey::Encode(database_id, object_store_id, key);
std::string version_encoded;
EncodeInt(version, &version_encoded);
leveldb_transaction->Put(exists_entry_key, &version_encoded);
std::string key_encoded;
EncodeIDBKey(key, &key_encoded);
record_identifier->Reset(key_encoded, version);
return s;
}
leveldb::Status IndexedDBBackingStore::ClearObjectStore(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id) {
IDB_TRACE("IndexedDBBackingStore::ClearObjectStore");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
const std::string start_key =
KeyPrefix(database_id, object_store_id).Encode();
const std::string stop_key =
KeyPrefix(database_id, object_store_id + 1).Encode();
leveldb::Status s =
DeleteRangeBasic(transaction->transaction(), start_key, stop_key, true);
if (!s.ok()) {
INTERNAL_WRITE_ERROR(CLEAR_OBJECT_STORE);
return s;
}
return DeleteBlobsInObjectStore(transaction, database_id, object_store_id);
}
leveldb::Status IndexedDBBackingStore::DeleteRecord(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const RecordIdentifier& record_identifier) {
IDB_TRACE("IndexedDBBackingStore::DeleteRecord");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
const std::string object_store_data_key = ObjectStoreDataKey::Encode(
database_id, object_store_id, record_identifier.primary_key());
leveldb_transaction->Remove(object_store_data_key);
leveldb::Status s = transaction->PutBlobInfoIfNeeded(
database_id, object_store_id, object_store_data_key, NULL, NULL);
if (!s.ok())
return s;
const std::string exists_entry_key = ExistsEntryKey::Encode(
database_id, object_store_id, record_identifier.primary_key());
leveldb_transaction->Remove(exists_entry_key);
return leveldb::Status::OK();
}
leveldb::Status IndexedDBBackingStore::DeleteRange(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKeyRange& key_range) {
leveldb::Status s;
scoped_ptr<IndexedDBBackingStore::Cursor> start_cursor =
OpenObjectStoreCursor(transaction,
database_id,
object_store_id,
key_range,
blink::WebIDBCursorDirectionNext,
&s);
if (!s.ok())
return s;
if (!start_cursor)
return leveldb::Status::OK(); // Empty range == delete success.
scoped_ptr<IndexedDBBackingStore::Cursor> end_cursor =
OpenObjectStoreCursor(transaction,
database_id,
object_store_id,
key_range,
blink::WebIDBCursorDirectionPrev,
&s);
if (!s.ok())
return s;
if (!end_cursor)
return leveldb::Status::OK(); // Empty range == delete success.
BlobEntryKey start_blob_key, end_blob_key;
std::string start_key = ObjectStoreDataKey::Encode(
database_id, object_store_id, start_cursor->key());
base::StringPiece start_key_piece(start_key);
if (!BlobEntryKey::FromObjectStoreDataKey(&start_key_piece, &start_blob_key))
return InternalInconsistencyStatus();
std::string stop_key = ObjectStoreDataKey::Encode(
database_id, object_store_id, end_cursor->key());
base::StringPiece stop_key_piece(stop_key);
if (!BlobEntryKey::FromObjectStoreDataKey(&stop_key_piece, &end_blob_key))
return InternalInconsistencyStatus();
s = DeleteBlobsInRange(transaction,
database_id,
object_store_id,
start_blob_key.Encode(),
end_blob_key.Encode(),
false);
if (!s.ok())
return s;
s = DeleteRangeBasic(transaction->transaction(), start_key, stop_key, false);
if (!s.ok())
return s;
start_key =
ExistsEntryKey::Encode(database_id, object_store_id, start_cursor->key());
stop_key =
ExistsEntryKey::Encode(database_id, object_store_id, end_cursor->key());
return DeleteRangeBasic(
transaction->transaction(), start_key, stop_key, false);
}
leveldb::Status IndexedDBBackingStore::GetKeyGeneratorCurrentNumber(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64* key_generator_current_number) {
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
const std::string key_generator_current_number_key =
ObjectStoreMetaDataKey::Encode(
database_id,
object_store_id,
ObjectStoreMetaDataKey::KEY_GENERATOR_CURRENT_NUMBER);
*key_generator_current_number = -1;
std::string data;
bool found = false;
leveldb::Status s =
leveldb_transaction->Get(key_generator_current_number_key, &data, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_KEY_GENERATOR_CURRENT_NUMBER);
return s;
}
if (found && !data.empty()) {
StringPiece slice(data);
if (!DecodeInt(&slice, key_generator_current_number) || !slice.empty()) {
INTERNAL_READ_ERROR_UNTESTED(GET_KEY_GENERATOR_CURRENT_NUMBER);
return InternalInconsistencyStatus();
}
return s;
}
// Previously, the key generator state was not stored explicitly
// but derived from the maximum numeric key present in existing
// data. This violates the spec as the data may be cleared but the
// key generator state must be preserved.
// TODO(jsbell): Fix this for all stores on database open?
const std::string start_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, MinIDBKey());
const std::string stop_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, MaxIDBKey());
scoped_ptr<LevelDBIterator> it = leveldb_transaction->CreateIterator();
int64 max_numeric_key = 0;
for (s = it->Seek(start_key);
s.ok() && it->IsValid() && CompareKeys(it->Key(), stop_key) < 0;
s = it->Next()) {
StringPiece slice(it->Key());
ObjectStoreDataKey data_key;
if (!ObjectStoreDataKey::Decode(&slice, &data_key) || !slice.empty()) {
INTERNAL_READ_ERROR_UNTESTED(GET_KEY_GENERATOR_CURRENT_NUMBER);
return InternalInconsistencyStatus();
}
scoped_ptr<IndexedDBKey> user_key = data_key.user_key();
if (user_key->type() == blink::WebIDBKeyTypeNumber) {
int64 n = static_cast<int64>(user_key->number());
if (n > max_numeric_key)
max_numeric_key = n;
}
}
if (s.ok())
*key_generator_current_number = max_numeric_key + 1;
else
INTERNAL_READ_ERROR_UNTESTED(GET_KEY_GENERATOR_CURRENT_NUMBER);
return s;
}
leveldb::Status IndexedDBBackingStore::MaybeUpdateKeyGeneratorCurrentNumber(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 new_number,
bool check_current) {
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
if (check_current) {
int64 current_number;
leveldb::Status s = GetKeyGeneratorCurrentNumber(
transaction, database_id, object_store_id, &current_number);
if (!s.ok())
return s;
if (new_number <= current_number)
return s;
}
const std::string key_generator_current_number_key =
ObjectStoreMetaDataKey::Encode(
database_id,
object_store_id,
ObjectStoreMetaDataKey::KEY_GENERATOR_CURRENT_NUMBER);
PutInt(
transaction->transaction(), key_generator_current_number_key, new_number);
return leveldb::Status::OK();
}
leveldb::Status IndexedDBBackingStore::KeyExistsInObjectStore(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKey& key,
RecordIdentifier* found_record_identifier,
bool* found) {
IDB_TRACE("IndexedDBBackingStore::KeyExistsInObjectStore");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
*found = false;
const std::string leveldb_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, key);
std::string data;
leveldb::Status s =
transaction->transaction()->Get(leveldb_key, &data, found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(KEY_EXISTS_IN_OBJECT_STORE);
return s;
}
if (!*found)
return leveldb::Status::OK();
if (!data.size()) {
INTERNAL_READ_ERROR_UNTESTED(KEY_EXISTS_IN_OBJECT_STORE);
return InternalInconsistencyStatus();
}
int64 version;
StringPiece slice(data);
if (!DecodeVarInt(&slice, &version))
return InternalInconsistencyStatus();
std::string encoded_key;
EncodeIDBKey(key, &encoded_key);
found_record_identifier->Reset(encoded_key, version);
return s;
}
class IndexedDBBackingStore::Transaction::ChainedBlobWriterImpl
: public IndexedDBBackingStore::Transaction::ChainedBlobWriter {
public:
typedef IndexedDBBackingStore::Transaction::WriteDescriptorVec
WriteDescriptorVec;
ChainedBlobWriterImpl(
int64 database_id,
IndexedDBBackingStore* backing_store,
WriteDescriptorVec* blobs,
scoped_refptr<IndexedDBBackingStore::BlobWriteCallback> callback)
: waiting_for_callback_(false),
database_id_(database_id),
backing_store_(backing_store),
callback_(callback),
aborted_(false) {
blobs_.swap(*blobs);
iter_ = blobs_.begin();
backing_store->task_runner()->PostTask(
FROM_HERE, base::Bind(&ChainedBlobWriterImpl::WriteNextFile, this));
}
virtual void set_delegate(scoped_ptr<FileWriterDelegate> delegate) OVERRIDE {
delegate_.reset(delegate.release());
}
virtual void ReportWriteCompletion(bool succeeded,
int64 bytes_written) OVERRIDE {
DCHECK(waiting_for_callback_);
DCHECK(!succeeded || bytes_written >= 0);
waiting_for_callback_ = false;
if (delegate_.get()) // Only present for Blob, not File.
content::BrowserThread::DeleteSoon(
content::BrowserThread::IO, FROM_HERE, delegate_.release());
if (aborted_) {
self_ref_ = NULL;
return;
}
if (iter_->size() != -1 && iter_->size() != bytes_written)
succeeded = false;
if (succeeded) {
++iter_;
WriteNextFile();
} else {
callback_->Run(false);
}
}
virtual void Abort() OVERRIDE {
if (!waiting_for_callback_)
return;
self_ref_ = this;
aborted_ = true;
}
private:
virtual ~ChainedBlobWriterImpl() {}
void WriteNextFile() {
DCHECK(!waiting_for_callback_);
DCHECK(!aborted_);
if (iter_ == blobs_.end()) {
DCHECK(!self_ref_);
callback_->Run(true);
return;
} else {
if (!backing_store_->WriteBlobFile(database_id_, *iter_, this)) {
callback_->Run(false);
return;
}
waiting_for_callback_ = true;
}
}
bool waiting_for_callback_;
scoped_refptr<ChainedBlobWriterImpl> self_ref_;
WriteDescriptorVec blobs_;
WriteDescriptorVec::const_iterator iter_;
int64 database_id_;
IndexedDBBackingStore* backing_store_;
scoped_refptr<IndexedDBBackingStore::BlobWriteCallback> callback_;
scoped_ptr<FileWriterDelegate> delegate_;
bool aborted_;
DISALLOW_COPY_AND_ASSIGN(ChainedBlobWriterImpl);
};
class LocalWriteClosure : public FileWriterDelegate::DelegateWriteCallback,
public base::RefCountedThreadSafe<LocalWriteClosure> {
public:
LocalWriteClosure(IndexedDBBackingStore::Transaction::ChainedBlobWriter*
chained_blob_writer,
base::SequencedTaskRunner* task_runner)
: chained_blob_writer_(chained_blob_writer),
task_runner_(task_runner),
bytes_written_(0) {}
void Run(base::File::Error rv,
int64 bytes,
FileWriterDelegate::WriteProgressStatus write_status) {
DCHECK_GE(bytes, 0);
bytes_written_ += bytes;
if (write_status == FileWriterDelegate::SUCCESS_IO_PENDING)
return; // We don't care about progress events.
if (rv == base::File::FILE_OK) {
DCHECK_EQ(write_status, FileWriterDelegate::SUCCESS_COMPLETED);
} else {
DCHECK(write_status == FileWriterDelegate::ERROR_WRITE_STARTED ||
write_status == FileWriterDelegate::ERROR_WRITE_NOT_STARTED);
}
task_runner_->PostTask(
FROM_HERE,
base::Bind(&IndexedDBBackingStore::Transaction::ChainedBlobWriter::
ReportWriteCompletion,
chained_blob_writer_,
write_status == FileWriterDelegate::SUCCESS_COMPLETED,
bytes_written_));
}
void writeBlobToFileOnIOThread(const FilePath& file_path,
const GURL& blob_url,
net::URLRequestContext* request_context) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
scoped_ptr<fileapi::FileStreamWriter> writer(
fileapi::FileStreamWriter::CreateForLocalFile(
task_runner_, file_path, 0,
fileapi::FileStreamWriter::CREATE_NEW_FILE));
scoped_ptr<FileWriterDelegate> delegate(
new FileWriterDelegate(writer.Pass(),
FileWriterDelegate::FLUSH_ON_COMPLETION));
DCHECK(blob_url.is_valid());
scoped_ptr<net::URLRequest> blob_request(request_context->CreateRequest(
blob_url, net::DEFAULT_PRIORITY, delegate.get(), NULL));
delegate->Start(blob_request.Pass(),
base::Bind(&LocalWriteClosure::Run, this));
chained_blob_writer_->set_delegate(delegate.Pass());
}
private:
virtual ~LocalWriteClosure() {
// Make sure the last reference to a ChainedBlobWriter is released (and
// deleted) on the IDB thread since it owns a transaction which has thread
// affinity.
IndexedDBBackingStore::Transaction::ChainedBlobWriter* raw_tmp =
chained_blob_writer_.get();
raw_tmp->AddRef();
chained_blob_writer_ = NULL;
task_runner_->ReleaseSoon(FROM_HERE, raw_tmp);
}
friend class base::RefCountedThreadSafe<LocalWriteClosure>;
scoped_refptr<IndexedDBBackingStore::Transaction::ChainedBlobWriter>
chained_blob_writer_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
int64 bytes_written_;
DISALLOW_COPY_AND_ASSIGN(LocalWriteClosure);
};
bool IndexedDBBackingStore::WriteBlobFile(
int64 database_id,
const Transaction::WriteDescriptor& descriptor,
Transaction::ChainedBlobWriter* chained_blob_writer) {
if (!MakeIDBBlobDirectory(blob_path_, database_id, descriptor.key()))
return false;
FilePath path = GetBlobFileName(database_id, descriptor.key());
if (descriptor.is_file()) {
DCHECK(!descriptor.file_path().empty());
if (!base::CopyFile(descriptor.file_path(), path))
return false;
base::File::Info info;
if (base::GetFileInfo(descriptor.file_path(), &info)) {
if (descriptor.size() != -1) {
if (descriptor.size() != info.size)
return false;
// The round-trip can be lossy; round to nearest millisecond.
int64 delta = (descriptor.last_modified() -
info.last_modified).InMilliseconds();
if (std::abs(delta) > 1)
return false;
}
if (!base::TouchFile(path, info.last_accessed, info.last_modified)) {
// TODO(ericu): Complain quietly; timestamp's probably not vital.
}
} else {
// TODO(ericu): Complain quietly; timestamp's probably not vital.
}
task_runner_->PostTask(
FROM_HERE,
base::Bind(&Transaction::ChainedBlobWriter::ReportWriteCompletion,
chained_blob_writer,
true,
info.size));
} else {
DCHECK(descriptor.url().is_valid());
scoped_refptr<LocalWriteClosure> write_closure(
new LocalWriteClosure(chained_blob_writer, task_runner_));
content::BrowserThread::PostTask(
content::BrowserThread::IO,
FROM_HERE,
base::Bind(&LocalWriteClosure::writeBlobToFileOnIOThread,
write_closure.get(),
path,
descriptor.url(),
request_context_));
}
return true;
}
void IndexedDBBackingStore::ReportBlobUnused(int64 database_id,
int64 blob_key) {
DCHECK(KeyPrefix::IsValidDatabaseId(database_id));
bool all_blobs = blob_key == DatabaseMetaDataKey::kAllBlobsKey;
DCHECK(all_blobs || DatabaseMetaDataKey::IsValidBlobKey(blob_key));
scoped_refptr<LevelDBTransaction> transaction =
IndexedDBClassFactory::Get()->CreateLevelDBTransaction(db_.get());
std::string live_blob_key = LiveBlobJournalKey::Encode();
BlobJournalType live_blob_journal;
if (!GetBlobJournal(live_blob_key, transaction.get(), &live_blob_journal)
.ok())
return;
DCHECK(live_blob_journal.size());
std::string primary_key = BlobJournalKey::Encode();
BlobJournalType primary_journal;
if (!GetBlobJournal(primary_key, transaction.get(), &primary_journal).ok())
return;
// There are several cases to handle. If blob_key is kAllBlobsKey, we want to
// remove all entries with database_id from the live_blob journal and add only
// kAllBlobsKey to the primary journal. Otherwise if IsValidBlobKey(blob_key)
// and we hit kAllBlobsKey for the right database_id in the journal, we leave
// the kAllBlobsKey entry in the live_blob journal but add the specific blob
// to the primary. Otherwise if IsValidBlobKey(blob_key) and we find a
// matching (database_id, blob_key) tuple, we should move it to the primary
// journal.
BlobJournalType new_live_blob_journal;
for (BlobJournalType::iterator journal_iter = live_blob_journal.begin();
journal_iter != live_blob_journal.end();
++journal_iter) {
int64 current_database_id = journal_iter->first;
int64 current_blob_key = journal_iter->second;
bool current_all_blobs =
current_blob_key == DatabaseMetaDataKey::kAllBlobsKey;
DCHECK(KeyPrefix::IsValidDatabaseId(current_database_id) ||
current_all_blobs);
if (current_database_id == database_id &&
(all_blobs || current_all_blobs || blob_key == current_blob_key)) {
if (!all_blobs) {
primary_journal.push_back(
std::make_pair(database_id, current_blob_key));
if (current_all_blobs)
new_live_blob_journal.push_back(*journal_iter);
new_live_blob_journal.insert(new_live_blob_journal.end(),
++journal_iter,
live_blob_journal.end()); // All the rest.
break;
}
} else {
new_live_blob_journal.push_back(*journal_iter);
}
}
if (all_blobs) {
primary_journal.push_back(
std::make_pair(database_id, DatabaseMetaDataKey::kAllBlobsKey));
}
UpdatePrimaryJournalWithBlobList(transaction.get(), primary_journal);
UpdateLiveBlobJournalWithBlobList(transaction.get(), new_live_blob_journal);
transaction->Commit();
// We could just do the deletions/cleaning here, but if there are a lot of
// blobs about to be garbage collected, it'd be better to wait and do them all
// at once.
StartJournalCleaningTimer();
}
// The this reference is a raw pointer that's declared Unretained inside the
// timer code, so this won't confuse IndexedDBFactory's check for
// HasLastBackingStoreReference. It's safe because if the backing store is
// deleted, the timer will automatically be canceled on destruction.
void IndexedDBBackingStore::StartJournalCleaningTimer() {
journal_cleaning_timer_.Start(
FROM_HERE,
base::TimeDelta::FromSeconds(5),
this,
&IndexedDBBackingStore::CleanPrimaryJournalIgnoreReturn);
}
// This assumes a file path of dbId/second-to-LSB-of-counter/counter.
FilePath IndexedDBBackingStore::GetBlobFileName(int64 database_id, int64 key) {
return GetBlobFileNameForKey(blob_path_, database_id, key);
}
static bool CheckIndexAndMetaDataKey(const LevelDBIterator* it,
const std::string& stop_key,
int64 index_id,
unsigned char meta_data_type) {
if (!it->IsValid() || CompareKeys(it->Key(), stop_key) >= 0)
return false;
StringPiece slice(it->Key());
IndexMetaDataKey meta_data_key;
bool ok = IndexMetaDataKey::Decode(&slice, &meta_data_key);
DCHECK(ok);
if (meta_data_key.IndexId() != index_id)
return false;
if (meta_data_key.meta_data_type() != meta_data_type)
return false;
return true;
}
// TODO(jsbell): This should do some error handling rather than plowing ahead
// when bad data is encountered.
leveldb::Status IndexedDBBackingStore::GetIndexes(
int64 database_id,
int64 object_store_id,
IndexedDBObjectStoreMetadata::IndexMap* indexes) {
IDB_TRACE("IndexedDBBackingStore::GetIndexes");
if (!KeyPrefix::ValidIds(database_id, object_store_id))
return InvalidDBKeyStatus();
const std::string start_key =
IndexMetaDataKey::Encode(database_id, object_store_id, 0, 0);
const std::string stop_key =
IndexMetaDataKey::Encode(database_id, object_store_id + 1, 0, 0);
DCHECK(indexes->empty());
scoped_ptr<LevelDBIterator> it = db_->CreateIterator();
leveldb::Status s = it->Seek(start_key);
while (s.ok() && it->IsValid() && CompareKeys(it->Key(), stop_key) < 0) {
StringPiece slice(it->Key());
IndexMetaDataKey meta_data_key;
bool ok = IndexMetaDataKey::Decode(&slice, &meta_data_key);
DCHECK(ok);
if (meta_data_key.meta_data_type() != IndexMetaDataKey::NAME) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
// Possible stale metadata due to http://webkit.org/b/85557 but don't fail
// the load.
s = it->Next();
if (!s.ok())
break;
continue;
}
// TODO(jsbell): Do this by direct key lookup rather than iteration, to
// simplify.
int64 index_id = meta_data_key.IndexId();
base::string16 index_name;
{
StringPiece slice(it->Value());
if (!DecodeString(&slice, &index_name) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
}
s = it->Next(); // unique flag
if (!s.ok())
break;
if (!CheckIndexAndMetaDataKey(
it.get(), stop_key, index_id, IndexMetaDataKey::UNIQUE)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
break;
}
bool index_unique;
{
StringPiece slice(it->Value());
if (!DecodeBool(&slice, &index_unique) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
}
s = it->Next(); // key_path
if (!s.ok())
break;
if (!CheckIndexAndMetaDataKey(
it.get(), stop_key, index_id, IndexMetaDataKey::KEY_PATH)) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
break;
}
IndexedDBKeyPath key_path;
{
StringPiece slice(it->Value());
if (!DecodeIDBKeyPath(&slice, &key_path) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
}
s = it->Next(); // [optional] multi_entry flag
if (!s.ok())
break;
bool index_multi_entry = false;
if (CheckIndexAndMetaDataKey(
it.get(), stop_key, index_id, IndexMetaDataKey::MULTI_ENTRY)) {
StringPiece slice(it->Value());
if (!DecodeBool(&slice, &index_multi_entry) || !slice.empty())
INTERNAL_CONSISTENCY_ERROR_UNTESTED(GET_INDEXES);
s = it->Next();
if (!s.ok())
break;
}
(*indexes)[index_id] = IndexedDBIndexMetadata(
index_name, index_id, key_path, index_unique, index_multi_entry);
}
if (!s.ok())
INTERNAL_READ_ERROR_UNTESTED(GET_INDEXES);
return s;
}
bool IndexedDBBackingStore::RemoveBlobFile(int64 database_id, int64 key) {
FilePath fileName = GetBlobFileName(database_id, key);
return base::DeleteFile(fileName, false);
}
bool IndexedDBBackingStore::RemoveBlobDirectory(int64 database_id) {
FilePath dirName = GetBlobDirectoryName(blob_path_, database_id);
return base::DeleteFile(dirName, true);
}
leveldb::Status IndexedDBBackingStore::CleanUpBlobJournal(
const std::string& level_db_key) {
scoped_refptr<LevelDBTransaction> journal_transaction =
IndexedDBClassFactory::Get()->CreateLevelDBTransaction(db_.get());
BlobJournalType journal;
leveldb::Status s =
GetBlobJournal(level_db_key, journal_transaction.get(), &journal);
if (!s.ok())
return s;
if (!journal.size())
return leveldb::Status::OK();
BlobJournalType::iterator journal_iter;
for (journal_iter = journal.begin(); journal_iter != journal.end();
++journal_iter) {
int64 database_id = journal_iter->first;
int64 blob_key = journal_iter->second;
DCHECK(KeyPrefix::IsValidDatabaseId(database_id));
if (blob_key == DatabaseMetaDataKey::kAllBlobsKey) {
if (!RemoveBlobDirectory(database_id))
return IOErrorStatus();
} else {
DCHECK(DatabaseMetaDataKey::IsValidBlobKey(blob_key));
if (!RemoveBlobFile(database_id, blob_key))
return IOErrorStatus();
}
}
ClearBlobJournal(journal_transaction.get(), level_db_key);
return journal_transaction->Commit();
}
leveldb::Status IndexedDBBackingStore::Transaction::GetBlobInfoForRecord(
int64 database_id,
const std::string& object_store_data_key,
IndexedDBValue* value) {
BlobChangeRecord* change_record = NULL;
BlobChangeMap::const_iterator blob_iter =
blob_change_map_.find(object_store_data_key);
if (blob_iter != blob_change_map_.end()) {
change_record = blob_iter->second;
} else {
blob_iter = incognito_blob_map_.find(object_store_data_key);
if (blob_iter != incognito_blob_map_.end())
change_record = blob_iter->second;
}
if (change_record) {
// Either we haven't written the blob to disk yet or we're in incognito
// mode, so we have to send back the one they sent us. This change record
// includes the original UUID.
value->blob_info = change_record->blob_info();
return leveldb::Status::OK();
}
BlobEntryKey blob_entry_key;
StringPiece leveldb_key_piece(object_store_data_key);
if (!BlobEntryKey::FromObjectStoreDataKey(&leveldb_key_piece,
&blob_entry_key)) {
NOTREACHED();
return InternalInconsistencyStatus();
}
scoped_ptr<LevelDBIterator> it = transaction()->CreateIterator();
std::string encoded_key = blob_entry_key.Encode();
leveldb::Status s = it->Seek(encoded_key);
if (!s.ok())
return s;
if (it->IsValid() && CompareKeys(it->Key(), encoded_key) == 0) {
if (!DecodeBlobData(it->Value().as_string(), &value->blob_info)) {
INTERNAL_READ_ERROR(GET_BLOB_INFO_FOR_RECORD);
return InternalInconsistencyStatus();
}
std::vector<IndexedDBBlobInfo>::iterator iter;
for (iter = value->blob_info.begin(); iter != value->blob_info.end();
++iter) {
iter->set_file_path(
backing_store_->GetBlobFileName(database_id, iter->key()));
iter->set_mark_used_callback(
backing_store_->active_blob_registry()->GetAddBlobRefCallback(
database_id, iter->key()));
iter->set_release_callback(
backing_store_->active_blob_registry()->GetFinalReleaseCallback(
database_id, iter->key()));
if (iter->is_file()) {
base::File::Info info;
if (base::GetFileInfo(iter->file_path(), &info)) {
// This should always work, but it isn't fatal if it doesn't; it just
// means a potential slow synchronous call from the renderer later.
iter->set_last_modified(info.last_modified);
iter->set_size(info.size);
}
}
}
}
return leveldb::Status::OK();
}
void IndexedDBBackingStore::CleanPrimaryJournalIgnoreReturn() {
CleanUpBlobJournal(BlobJournalKey::Encode());
}
WARN_UNUSED_RESULT static leveldb::Status SetMaxIndexId(
LevelDBTransaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id) {
int64 max_index_id = -1;
const std::string max_index_id_key = ObjectStoreMetaDataKey::Encode(
database_id, object_store_id, ObjectStoreMetaDataKey::MAX_INDEX_ID);
bool found = false;
leveldb::Status s =
GetInt(transaction, max_index_id_key, &max_index_id, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(SET_MAX_INDEX_ID);
return s;
}
if (!found)
max_index_id = kMinimumIndexId;
if (index_id <= max_index_id) {
INTERNAL_CONSISTENCY_ERROR_UNTESTED(SET_MAX_INDEX_ID);
return InternalInconsistencyStatus();
}
PutInt(transaction, max_index_id_key, index_id);
return s;
}
leveldb::Status IndexedDBBackingStore::CreateIndex(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const base::string16& name,
const IndexedDBKeyPath& key_path,
bool is_unique,
bool is_multi_entry) {
IDB_TRACE("IndexedDBBackingStore::CreateIndex");
if (!KeyPrefix::ValidIds(database_id, object_store_id, index_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
leveldb::Status s = SetMaxIndexId(
leveldb_transaction, database_id, object_store_id, index_id);
if (!s.ok())
return s;
const std::string name_key = IndexMetaDataKey::Encode(
database_id, object_store_id, index_id, IndexMetaDataKey::NAME);
const std::string unique_key = IndexMetaDataKey::Encode(
database_id, object_store_id, index_id, IndexMetaDataKey::UNIQUE);
const std::string key_path_key = IndexMetaDataKey::Encode(
database_id, object_store_id, index_id, IndexMetaDataKey::KEY_PATH);
const std::string multi_entry_key = IndexMetaDataKey::Encode(
database_id, object_store_id, index_id, IndexMetaDataKey::MULTI_ENTRY);
PutString(leveldb_transaction, name_key, name);
PutBool(leveldb_transaction, unique_key, is_unique);
PutIDBKeyPath(leveldb_transaction, key_path_key, key_path);
PutBool(leveldb_transaction, multi_entry_key, is_multi_entry);
return s;
}
leveldb::Status IndexedDBBackingStore::DeleteIndex(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id) {
IDB_TRACE("IndexedDBBackingStore::DeleteIndex");
if (!KeyPrefix::ValidIds(database_id, object_store_id, index_id))
return InvalidDBKeyStatus();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
const std::string index_meta_data_start =
IndexMetaDataKey::Encode(database_id, object_store_id, index_id, 0);
const std::string index_meta_data_end =
IndexMetaDataKey::EncodeMaxKey(database_id, object_store_id, index_id);
leveldb::Status s = DeleteRangeBasic(
leveldb_transaction, index_meta_data_start, index_meta_data_end, true);
if (s.ok()) {
const std::string index_data_start =
IndexDataKey::EncodeMinKey(database_id, object_store_id, index_id);
const std::string index_data_end =
IndexDataKey::EncodeMaxKey(database_id, object_store_id, index_id);
s = DeleteRangeBasic(
leveldb_transaction, index_data_start, index_data_end, true);
}
if (!s.ok())
INTERNAL_WRITE_ERROR_UNTESTED(DELETE_INDEX);
return s;
}
leveldb::Status IndexedDBBackingStore::PutIndexDataForRecord(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKey& key,
const RecordIdentifier& record_identifier) {
IDB_TRACE("IndexedDBBackingStore::PutIndexDataForRecord");
DCHECK(key.IsValid());
if (!KeyPrefix::ValidIds(database_id, object_store_id, index_id))
return InvalidDBKeyStatus();
std::string encoded_key;
EncodeIDBKey(key, &encoded_key);
const std::string index_data_key =
IndexDataKey::Encode(database_id,
object_store_id,
index_id,
encoded_key,
record_identifier.primary_key(),
0);
std::string data;
EncodeVarInt(record_identifier.version(), &data);
data.append(record_identifier.primary_key());
transaction->transaction()->Put(index_data_key, &data);
return leveldb::Status::OK();
}
static bool FindGreatestKeyLessThanOrEqual(LevelDBTransaction* transaction,
const std::string& target,
std::string* found_key,
leveldb::Status* s) {
scoped_ptr<LevelDBIterator> it = transaction->CreateIterator();
*s = it->Seek(target);
if (!s->ok())
return false;
if (!it->IsValid()) {
*s = it->SeekToLast();
if (!s->ok() || !it->IsValid())
return false;
}
while (CompareIndexKeys(it->Key(), target) > 0) {
*s = it->Prev();
if (!s->ok() || !it->IsValid())
return false;
}
do {
*found_key = it->Key().as_string();
// There can be several index keys that compare equal. We want the last one.
*s = it->Next();
} while (s->ok() && it->IsValid() && !CompareIndexKeys(it->Key(), target));
return true;
}
static leveldb::Status VersionExists(LevelDBTransaction* transaction,
int64 database_id,
int64 object_store_id,
int64 version,
const std::string& encoded_primary_key,
bool* exists) {
const std::string key =
ExistsEntryKey::Encode(database_id, object_store_id, encoded_primary_key);
std::string data;
leveldb::Status s = transaction->Get(key, &data, exists);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(VERSION_EXISTS);
return s;
}
if (!*exists)
return s;
StringPiece slice(data);
int64 decoded;
if (!DecodeInt(&slice, &decoded) || !slice.empty())
return InternalInconsistencyStatus();
*exists = (decoded == version);
return s;
}
leveldb::Status IndexedDBBackingStore::FindKeyInIndex(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKey& key,
std::string* found_encoded_primary_key,
bool* found) {
IDB_TRACE("IndexedDBBackingStore::FindKeyInIndex");
DCHECK(KeyPrefix::ValidIds(database_id, object_store_id, index_id));
DCHECK(found_encoded_primary_key->empty());
*found = false;
LevelDBTransaction* leveldb_transaction = transaction->transaction();
const std::string leveldb_key =
IndexDataKey::Encode(database_id, object_store_id, index_id, key);
scoped_ptr<LevelDBIterator> it = leveldb_transaction->CreateIterator();
leveldb::Status s = it->Seek(leveldb_key);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(FIND_KEY_IN_INDEX);
return s;
}
for (;;) {
if (!it->IsValid())
return leveldb::Status::OK();
if (CompareIndexKeys(it->Key(), leveldb_key) > 0)
return leveldb::Status::OK();
StringPiece slice(it->Value());
int64 version;
if (!DecodeVarInt(&slice, &version)) {
INTERNAL_READ_ERROR_UNTESTED(FIND_KEY_IN_INDEX);
return InternalInconsistencyStatus();
}
*found_encoded_primary_key = slice.as_string();
bool exists = false;
s = VersionExists(leveldb_transaction,
database_id,
object_store_id,
version,
*found_encoded_primary_key,
&exists);
if (!s.ok())
return s;
if (!exists) {
// Delete stale index data entry and continue.
leveldb_transaction->Remove(it->Key());
s = it->Next();
continue;
}
*found = true;
return s;
}
}
leveldb::Status IndexedDBBackingStore::GetPrimaryKeyViaIndex(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKey& key,
scoped_ptr<IndexedDBKey>* primary_key) {
IDB_TRACE("IndexedDBBackingStore::GetPrimaryKeyViaIndex");
if (!KeyPrefix::ValidIds(database_id, object_store_id, index_id))
return InvalidDBKeyStatus();
bool found = false;
std::string found_encoded_primary_key;
leveldb::Status s = FindKeyInIndex(transaction,
database_id,
object_store_id,
index_id,
key,
&found_encoded_primary_key,
&found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(GET_PRIMARY_KEY_VIA_INDEX);
return s;
}
if (!found)
return s;
if (!found_encoded_primary_key.size()) {
INTERNAL_READ_ERROR_UNTESTED(GET_PRIMARY_KEY_VIA_INDEX);
return InvalidDBKeyStatus();
}
StringPiece slice(found_encoded_primary_key);
if (DecodeIDBKey(&slice, primary_key) && slice.empty())
return s;
else
return InvalidDBKeyStatus();
}
leveldb::Status IndexedDBBackingStore::KeyExistsInIndex(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKey& index_key,
scoped_ptr<IndexedDBKey>* found_primary_key,
bool* exists) {
IDB_TRACE("IndexedDBBackingStore::KeyExistsInIndex");
if (!KeyPrefix::ValidIds(database_id, object_store_id, index_id))
return InvalidDBKeyStatus();
*exists = false;
std::string found_encoded_primary_key;
leveldb::Status s = FindKeyInIndex(transaction,
database_id,
object_store_id,
index_id,
index_key,
&found_encoded_primary_key,
exists);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(KEY_EXISTS_IN_INDEX);
return s;
}
if (!*exists)
return leveldb::Status::OK();
if (found_encoded_primary_key.empty()) {
INTERNAL_READ_ERROR_UNTESTED(KEY_EXISTS_IN_INDEX);
return InvalidDBKeyStatus();
}
StringPiece slice(found_encoded_primary_key);
if (DecodeIDBKey(&slice, found_primary_key) && slice.empty())
return s;
else
return InvalidDBKeyStatus();
}
IndexedDBBackingStore::Cursor::Cursor(
const IndexedDBBackingStore::Cursor* other)
: backing_store_(other->backing_store_),
transaction_(other->transaction_),
database_id_(other->database_id_),
cursor_options_(other->cursor_options_),
current_key_(new IndexedDBKey(*other->current_key_)) {
if (other->iterator_) {
iterator_ = transaction_->transaction()->CreateIterator();
if (other->iterator_->IsValid()) {
leveldb::Status s = iterator_->Seek(other->iterator_->Key());
// TODO(cmumford): Handle this error (crbug.com/363397)
DCHECK(iterator_->IsValid());
}
}
}
IndexedDBBackingStore::Cursor::Cursor(
scoped_refptr<IndexedDBBackingStore> backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
const CursorOptions& cursor_options)
: backing_store_(backing_store),
transaction_(transaction),
database_id_(database_id),
cursor_options_(cursor_options) {
}
IndexedDBBackingStore::Cursor::~Cursor() {}
bool IndexedDBBackingStore::Cursor::FirstSeek(leveldb::Status* s) {
iterator_ = transaction_->transaction()->CreateIterator();
if (cursor_options_.forward)
*s = iterator_->Seek(cursor_options_.low_key);
else
*s = iterator_->Seek(cursor_options_.high_key);
if (!s->ok())
return false;
return Continue(0, READY, s);
}
bool IndexedDBBackingStore::Cursor::Advance(uint32 count, leveldb::Status* s) {
*s = leveldb::Status::OK();
while (count--) {
if (!Continue(s))
return false;
}
return true;
}
bool IndexedDBBackingStore::Cursor::Continue(const IndexedDBKey* key,
const IndexedDBKey* primary_key,
IteratorState next_state,
leveldb::Status* s) {
DCHECK(!key || key->IsValid());
DCHECK(!primary_key || primary_key->IsValid());
*s = leveldb::Status::OK();
// TODO(alecflett): avoid a copy here?
IndexedDBKey previous_key = current_key_ ? *current_key_ : IndexedDBKey();
// When iterating with PrevNoDuplicate, spec requires that the
// value we yield for each key is the first duplicate in forwards
// order.
IndexedDBKey last_duplicate_key;
bool forward = cursor_options_.forward;
bool first_iteration_forward = forward;
bool flipped = false;
for (;;) {
if (next_state == SEEK) {
// TODO(jsbell): Optimize seeking for reverse cursors as well.
if (first_iteration_forward && key) {
first_iteration_forward = false;
std::string leveldb_key;
if (primary_key) {
leveldb_key = EncodeKey(*key, *primary_key);
} else {
leveldb_key = EncodeKey(*key);
}
*s = iterator_->Seek(leveldb_key);
} else if (forward) {
*s = iterator_->Next();
} else {
*s = iterator_->Prev();
}
if (!s->ok())
return false;
} else {
next_state = SEEK; // for subsequent iterations
}
if (!iterator_->IsValid()) {
if (!forward && last_duplicate_key.IsValid()) {
// We need to walk forward because we hit the end of
// the data.
forward = true;
flipped = true;
continue;
}
return false;
}
if (IsPastBounds()) {
if (!forward && last_duplicate_key.IsValid()) {
// We need to walk forward because now we're beyond the
// bounds defined by the cursor.
forward = true;
flipped = true;
continue;
}
return false;
}
if (!HaveEnteredRange())
continue;
// The row may not load because there's a stale entry in the
// index. This is not fatal.
if (!LoadCurrentRow())
continue;
if (key) {
if (forward) {
if (primary_key && current_key_->Equals(*key) &&
this->primary_key().IsLessThan(*primary_key))
continue;
if (!flipped && current_key_->IsLessThan(*key))
continue;
} else {
if (primary_key && key->Equals(*current_key_) &&
primary_key->IsLessThan(this->primary_key()))
continue;
if (key->IsLessThan(*current_key_))
continue;
}
}
if (cursor_options_.unique) {
if (previous_key.IsValid() && current_key_->Equals(previous_key)) {
// We should never be able to walk forward all the way
// to the previous key.
DCHECK(!last_duplicate_key.IsValid());
continue;
}
if (!forward) {
if (!last_duplicate_key.IsValid()) {
last_duplicate_key = *current_key_;
continue;
}
// We need to walk forward because we hit the boundary
// between key ranges.
if (!last_duplicate_key.Equals(*current_key_)) {
forward = true;
flipped = true;
continue;
}
continue;
}
}
break;
}
DCHECK(!last_duplicate_key.IsValid() ||
(forward && last_duplicate_key.Equals(*current_key_)));
return true;
}
bool IndexedDBBackingStore::Cursor::HaveEnteredRange() const {
if (cursor_options_.forward) {
int compare = CompareIndexKeys(iterator_->Key(), cursor_options_.low_key);
if (cursor_options_.low_open) {
return compare > 0;
}
return compare >= 0;
}
int compare = CompareIndexKeys(iterator_->Key(), cursor_options_.high_key);
if (cursor_options_.high_open) {
return compare < 0;
}
return compare <= 0;
}
bool IndexedDBBackingStore::Cursor::IsPastBounds() const {
if (cursor_options_.forward) {
int compare = CompareIndexKeys(iterator_->Key(), cursor_options_.high_key);
if (cursor_options_.high_open) {
return compare >= 0;
}
return compare > 0;
}
int compare = CompareIndexKeys(iterator_->Key(), cursor_options_.low_key);
if (cursor_options_.low_open) {
return compare <= 0;
}
return compare < 0;
}
const IndexedDBKey& IndexedDBBackingStore::Cursor::primary_key() const {
return *current_key_;
}
const IndexedDBBackingStore::RecordIdentifier&
IndexedDBBackingStore::Cursor::record_identifier() const {
return record_identifier_;
}
class ObjectStoreKeyCursorImpl : public IndexedDBBackingStore::Cursor {
public:
ObjectStoreKeyCursorImpl(
scoped_refptr<IndexedDBBackingStore> backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
const IndexedDBBackingStore::Cursor::CursorOptions& cursor_options)
: IndexedDBBackingStore::Cursor(backing_store,
transaction,
database_id,
cursor_options) {}
virtual Cursor* Clone() OVERRIDE {
return new ObjectStoreKeyCursorImpl(this);
}
// IndexedDBBackingStore::Cursor
virtual IndexedDBValue* value() OVERRIDE {
NOTREACHED();
return NULL;
}
virtual bool LoadCurrentRow() OVERRIDE;
protected:
virtual std::string EncodeKey(const IndexedDBKey& key) OVERRIDE {
return ObjectStoreDataKey::Encode(
cursor_options_.database_id, cursor_options_.object_store_id, key);
}
virtual std::string EncodeKey(const IndexedDBKey& key,
const IndexedDBKey& primary_key) OVERRIDE {
NOTREACHED();
return std::string();
}
private:
explicit ObjectStoreKeyCursorImpl(const ObjectStoreKeyCursorImpl* other)
: IndexedDBBackingStore::Cursor(other) {}
DISALLOW_COPY_AND_ASSIGN(ObjectStoreKeyCursorImpl);
};
bool ObjectStoreKeyCursorImpl::LoadCurrentRow() {
StringPiece slice(iterator_->Key());
ObjectStoreDataKey object_store_data_key;
if (!ObjectStoreDataKey::Decode(&slice, &object_store_data_key)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
current_key_ = object_store_data_key.user_key();
int64 version;
slice = StringPiece(iterator_->Value());
if (!DecodeVarInt(&slice, &version)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
// TODO(jsbell): This re-encodes what was just decoded; try and optimize.
std::string encoded_key;
EncodeIDBKey(*current_key_, &encoded_key);
record_identifier_.Reset(encoded_key, version);
return true;
}
class ObjectStoreCursorImpl : public IndexedDBBackingStore::Cursor {
public:
ObjectStoreCursorImpl(
scoped_refptr<IndexedDBBackingStore> backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
const IndexedDBBackingStore::Cursor::CursorOptions& cursor_options)
: IndexedDBBackingStore::Cursor(backing_store,
transaction,
database_id,
cursor_options) {}
virtual Cursor* Clone() OVERRIDE { return new ObjectStoreCursorImpl(this); }
// IndexedDBBackingStore::Cursor
virtual IndexedDBValue* value() OVERRIDE { return &current_value_; }
virtual bool LoadCurrentRow() OVERRIDE;
protected:
virtual std::string EncodeKey(const IndexedDBKey& key) OVERRIDE {
return ObjectStoreDataKey::Encode(
cursor_options_.database_id, cursor_options_.object_store_id, key);
}
virtual std::string EncodeKey(const IndexedDBKey& key,
const IndexedDBKey& primary_key) OVERRIDE {
NOTREACHED();
return std::string();
}
private:
explicit ObjectStoreCursorImpl(const ObjectStoreCursorImpl* other)
: IndexedDBBackingStore::Cursor(other),
current_value_(other->current_value_) {}
IndexedDBValue current_value_;
DISALLOW_COPY_AND_ASSIGN(ObjectStoreCursorImpl);
};
bool ObjectStoreCursorImpl::LoadCurrentRow() {
StringPiece key_slice(iterator_->Key());
ObjectStoreDataKey object_store_data_key;
if (!ObjectStoreDataKey::Decode(&key_slice, &object_store_data_key)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
current_key_ = object_store_data_key.user_key();
int64 version;
StringPiece value_slice = StringPiece(iterator_->Value());
if (!DecodeVarInt(&value_slice, &version)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
// TODO(jsbell): This re-encodes what was just decoded; try and optimize.
std::string encoded_key;
EncodeIDBKey(*current_key_, &encoded_key);
record_identifier_.Reset(encoded_key, version);
if (!transaction_->GetBlobInfoForRecord(database_id_,
iterator_->Key().as_string(),
&current_value_).ok()) {
return false;
}
current_value_.bits = value_slice.as_string();
return true;
}
class IndexKeyCursorImpl : public IndexedDBBackingStore::Cursor {
public:
IndexKeyCursorImpl(
scoped_refptr<IndexedDBBackingStore> backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
const IndexedDBBackingStore::Cursor::CursorOptions& cursor_options)
: IndexedDBBackingStore::Cursor(backing_store,
transaction,
database_id,
cursor_options) {}
virtual Cursor* Clone() OVERRIDE { return new IndexKeyCursorImpl(this); }
// IndexedDBBackingStore::Cursor
virtual IndexedDBValue* value() OVERRIDE {
NOTREACHED();
return NULL;
}
virtual const IndexedDBKey& primary_key() const OVERRIDE {
return *primary_key_;
}
virtual const IndexedDBBackingStore::RecordIdentifier& record_identifier()
const OVERRIDE {
NOTREACHED();
return record_identifier_;
}
virtual bool LoadCurrentRow() OVERRIDE;
protected:
virtual std::string EncodeKey(const IndexedDBKey& key) OVERRIDE {
return IndexDataKey::Encode(cursor_options_.database_id,
cursor_options_.object_store_id,
cursor_options_.index_id,
key);
}
virtual std::string EncodeKey(const IndexedDBKey& key,
const IndexedDBKey& primary_key) OVERRIDE {
return IndexDataKey::Encode(cursor_options_.database_id,
cursor_options_.object_store_id,
cursor_options_.index_id,
key,
primary_key);
}
private:
explicit IndexKeyCursorImpl(const IndexKeyCursorImpl* other)
: IndexedDBBackingStore::Cursor(other),
primary_key_(new IndexedDBKey(*other->primary_key_)) {}
scoped_ptr<IndexedDBKey> primary_key_;
DISALLOW_COPY_AND_ASSIGN(IndexKeyCursorImpl);
};
bool IndexKeyCursorImpl::LoadCurrentRow() {
StringPiece slice(iterator_->Key());
IndexDataKey index_data_key;
if (!IndexDataKey::Decode(&slice, &index_data_key)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
current_key_ = index_data_key.user_key();
DCHECK(current_key_);
slice = StringPiece(iterator_->Value());
int64 index_data_version;
if (!DecodeVarInt(&slice, &index_data_version)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
if (!DecodeIDBKey(&slice, &primary_key_) || !slice.empty()) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
std::string primary_leveldb_key =
ObjectStoreDataKey::Encode(index_data_key.DatabaseId(),
index_data_key.ObjectStoreId(),
*primary_key_);
std::string result;
bool found = false;
leveldb::Status s =
transaction_->transaction()->Get(primary_leveldb_key, &result, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
if (!found) {
transaction_->transaction()->Remove(iterator_->Key());
return false;
}
if (!result.size()) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
int64 object_store_data_version;
slice = StringPiece(result);
if (!DecodeVarInt(&slice, &object_store_data_version)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
if (object_store_data_version != index_data_version) {
transaction_->transaction()->Remove(iterator_->Key());
return false;
}
return true;
}
class IndexCursorImpl : public IndexedDBBackingStore::Cursor {
public:
IndexCursorImpl(
scoped_refptr<IndexedDBBackingStore> backing_store,
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
const IndexedDBBackingStore::Cursor::CursorOptions& cursor_options)
: IndexedDBBackingStore::Cursor(backing_store,
transaction,
database_id,
cursor_options) {}
virtual Cursor* Clone() OVERRIDE { return new IndexCursorImpl(this); }
// IndexedDBBackingStore::Cursor
virtual IndexedDBValue* value() OVERRIDE { return &current_value_; }
virtual const IndexedDBKey& primary_key() const OVERRIDE {
return *primary_key_;
}
virtual const IndexedDBBackingStore::RecordIdentifier& record_identifier()
const OVERRIDE {
NOTREACHED();
return record_identifier_;
}
virtual bool LoadCurrentRow() OVERRIDE;
protected:
virtual std::string EncodeKey(const IndexedDBKey& key) OVERRIDE {
return IndexDataKey::Encode(cursor_options_.database_id,
cursor_options_.object_store_id,
cursor_options_.index_id,
key);
}
virtual std::string EncodeKey(const IndexedDBKey& key,
const IndexedDBKey& primary_key) OVERRIDE {
return IndexDataKey::Encode(cursor_options_.database_id,
cursor_options_.object_store_id,
cursor_options_.index_id,
key,
primary_key);
}
private:
explicit IndexCursorImpl(const IndexCursorImpl* other)
: IndexedDBBackingStore::Cursor(other),
primary_key_(new IndexedDBKey(*other->primary_key_)),
current_value_(other->current_value_),
primary_leveldb_key_(other->primary_leveldb_key_) {}
scoped_ptr<IndexedDBKey> primary_key_;
IndexedDBValue current_value_;
std::string primary_leveldb_key_;
DISALLOW_COPY_AND_ASSIGN(IndexCursorImpl);
};
bool IndexCursorImpl::LoadCurrentRow() {
StringPiece slice(iterator_->Key());
IndexDataKey index_data_key;
if (!IndexDataKey::Decode(&slice, &index_data_key)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
current_key_ = index_data_key.user_key();
DCHECK(current_key_);
slice = StringPiece(iterator_->Value());
int64 index_data_version;
if (!DecodeVarInt(&slice, &index_data_version)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
if (!DecodeIDBKey(&slice, &primary_key_)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
DCHECK_EQ(index_data_key.DatabaseId(), database_id_);
primary_leveldb_key_ =
ObjectStoreDataKey::Encode(index_data_key.DatabaseId(),
index_data_key.ObjectStoreId(),
*primary_key_);
std::string result;
bool found = false;
leveldb::Status s =
transaction_->transaction()->Get(primary_leveldb_key_, &result, &found);
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
if (!found) {
transaction_->transaction()->Remove(iterator_->Key());
return false;
}
if (!result.size()) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
int64 object_store_data_version;
slice = StringPiece(result);
if (!DecodeVarInt(&slice, &object_store_data_version)) {
INTERNAL_READ_ERROR_UNTESTED(LOAD_CURRENT_ROW);
return false;
}
if (object_store_data_version != index_data_version) {
transaction_->transaction()->Remove(iterator_->Key());
return false;
}
current_value_.bits = slice.as_string();
return transaction_->GetBlobInfoForRecord(database_id_,
primary_leveldb_key_,
&current_value_).ok();
}
bool ObjectStoreCursorOptions(
LevelDBTransaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKeyRange& range,
blink::WebIDBCursorDirection direction,
IndexedDBBackingStore::Cursor::CursorOptions* cursor_options) {
cursor_options->database_id = database_id;
cursor_options->object_store_id = object_store_id;
bool lower_bound = range.lower().IsValid();
bool upper_bound = range.upper().IsValid();
cursor_options->forward =
(direction == blink::WebIDBCursorDirectionNextNoDuplicate ||
direction == blink::WebIDBCursorDirectionNext);
cursor_options->unique =
(direction == blink::WebIDBCursorDirectionNextNoDuplicate ||
direction == blink::WebIDBCursorDirectionPrevNoDuplicate);
if (!lower_bound) {
cursor_options->low_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, MinIDBKey());
cursor_options->low_open = true; // Not included.
} else {
cursor_options->low_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, range.lower());
cursor_options->low_open = range.lowerOpen();
}
leveldb::Status s;
if (!upper_bound) {
cursor_options->high_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, MaxIDBKey());
if (cursor_options->forward) {
cursor_options->high_open = true; // Not included.
} else {
// We need a key that exists.
// TODO(cmumford): Handle this error (crbug.com/363397)
if (!FindGreatestKeyLessThanOrEqual(transaction,
cursor_options->high_key,
&cursor_options->high_key,
&s))
return false;
cursor_options->high_open = false;
}
} else {
cursor_options->high_key =
ObjectStoreDataKey::Encode(database_id, object_store_id, range.upper());
cursor_options->high_open = range.upperOpen();
if (!cursor_options->forward) {
// For reverse cursors, we need a key that exists.
std::string found_high_key;
// TODO(cmumford): Handle this error (crbug.com/363397)
if (!FindGreatestKeyLessThanOrEqual(
transaction, cursor_options->high_key, &found_high_key, &s))
return false;
// If the target key should not be included, but we end up with a smaller
// key, we should include that.
if (cursor_options->high_open &&
CompareIndexKeys(found_high_key, cursor_options->high_key) < 0)
cursor_options->high_open = false;
cursor_options->high_key = found_high_key;
}
}
return true;
}
bool IndexCursorOptions(
LevelDBTransaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKeyRange& range,
blink::WebIDBCursorDirection direction,
IndexedDBBackingStore::Cursor::CursorOptions* cursor_options) {
DCHECK(transaction);
if (!KeyPrefix::ValidIds(database_id, object_store_id, index_id))
return false;
cursor_options->database_id = database_id;
cursor_options->object_store_id = object_store_id;
cursor_options->index_id = index_id;
bool lower_bound = range.lower().IsValid();
bool upper_bound = range.upper().IsValid();
cursor_options->forward =
(direction == blink::WebIDBCursorDirectionNextNoDuplicate ||
direction == blink::WebIDBCursorDirectionNext);
cursor_options->unique =
(direction == blink::WebIDBCursorDirectionNextNoDuplicate ||
direction == blink::WebIDBCursorDirectionPrevNoDuplicate);
if (!lower_bound) {
cursor_options->low_key =
IndexDataKey::EncodeMinKey(database_id, object_store_id, index_id);
cursor_options->low_open = false; // Included.
} else {
cursor_options->low_key = IndexDataKey::Encode(
database_id, object_store_id, index_id, range.lower());
cursor_options->low_open = range.lowerOpen();
}
leveldb::Status s;
if (!upper_bound) {
cursor_options->high_key =
IndexDataKey::EncodeMaxKey(database_id, object_store_id, index_id);
cursor_options->high_open = false; // Included.
if (!cursor_options->forward) { // We need a key that exists.
if (!FindGreatestKeyLessThanOrEqual(transaction,
cursor_options->high_key,
&cursor_options->high_key,
&s))
return false;
cursor_options->high_open = false;
}
} else {
cursor_options->high_key = IndexDataKey::Encode(
database_id, object_store_id, index_id, range.upper());
cursor_options->high_open = range.upperOpen();
std::string found_high_key;
// Seek to the *last* key in the set of non-unique keys
// TODO(cmumford): Handle this error (crbug.com/363397)
if (!FindGreatestKeyLessThanOrEqual(
transaction, cursor_options->high_key, &found_high_key, &s))
return false;
// If the target key should not be included, but we end up with a smaller
// key, we should include that.
if (cursor_options->high_open &&
CompareIndexKeys(found_high_key, cursor_options->high_key) < 0)
cursor_options->high_open = false;
cursor_options->high_key = found_high_key;
}
return true;
}
scoped_ptr<IndexedDBBackingStore::Cursor>
IndexedDBBackingStore::OpenObjectStoreCursor(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKeyRange& range,
blink::WebIDBCursorDirection direction,
leveldb::Status* s) {
IDB_TRACE("IndexedDBBackingStore::OpenObjectStoreCursor");
*s = leveldb::Status::OK();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
IndexedDBBackingStore::Cursor::CursorOptions cursor_options;
if (!ObjectStoreCursorOptions(leveldb_transaction,
database_id,
object_store_id,
range,
direction,
&cursor_options))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
scoped_ptr<ObjectStoreCursorImpl> cursor(new ObjectStoreCursorImpl(
this, transaction, database_id, cursor_options));
if (!cursor->FirstSeek(s))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
return cursor.PassAs<IndexedDBBackingStore::Cursor>();
}
scoped_ptr<IndexedDBBackingStore::Cursor>
IndexedDBBackingStore::OpenObjectStoreKeyCursor(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
const IndexedDBKeyRange& range,
blink::WebIDBCursorDirection direction,
leveldb::Status* s) {
IDB_TRACE("IndexedDBBackingStore::OpenObjectStoreKeyCursor");
*s = leveldb::Status::OK();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
IndexedDBBackingStore::Cursor::CursorOptions cursor_options;
if (!ObjectStoreCursorOptions(leveldb_transaction,
database_id,
object_store_id,
range,
direction,
&cursor_options))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
scoped_ptr<ObjectStoreKeyCursorImpl> cursor(new ObjectStoreKeyCursorImpl(
this, transaction, database_id, cursor_options));
if (!cursor->FirstSeek(s))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
return cursor.PassAs<IndexedDBBackingStore::Cursor>();
}
scoped_ptr<IndexedDBBackingStore::Cursor>
IndexedDBBackingStore::OpenIndexKeyCursor(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKeyRange& range,
blink::WebIDBCursorDirection direction,
leveldb::Status* s) {
IDB_TRACE("IndexedDBBackingStore::OpenIndexKeyCursor");
*s = leveldb::Status::OK();
LevelDBTransaction* leveldb_transaction = transaction->transaction();
IndexedDBBackingStore::Cursor::CursorOptions cursor_options;
if (!IndexCursorOptions(leveldb_transaction,
database_id,
object_store_id,
index_id,
range,
direction,
&cursor_options))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
scoped_ptr<IndexKeyCursorImpl> cursor(
new IndexKeyCursorImpl(this, transaction, database_id, cursor_options));
if (!cursor->FirstSeek(s))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
return cursor.PassAs<IndexedDBBackingStore::Cursor>();
}
scoped_ptr<IndexedDBBackingStore::Cursor>
IndexedDBBackingStore::OpenIndexCursor(
IndexedDBBackingStore::Transaction* transaction,
int64 database_id,
int64 object_store_id,
int64 index_id,
const IndexedDBKeyRange& range,
blink::WebIDBCursorDirection direction,
leveldb::Status* s) {
IDB_TRACE("IndexedDBBackingStore::OpenIndexCursor");
LevelDBTransaction* leveldb_transaction = transaction->transaction();
IndexedDBBackingStore::Cursor::CursorOptions cursor_options;
if (!IndexCursorOptions(leveldb_transaction,
database_id,
object_store_id,
index_id,
range,
direction,
&cursor_options))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
scoped_ptr<IndexCursorImpl> cursor(
new IndexCursorImpl(this, transaction, database_id, cursor_options));
if (!cursor->FirstSeek(s))
return scoped_ptr<IndexedDBBackingStore::Cursor>();
return cursor.PassAs<IndexedDBBackingStore::Cursor>();
}
IndexedDBBackingStore::Transaction::Transaction(
IndexedDBBackingStore* backing_store)
: backing_store_(backing_store), database_id_(-1) {
}
IndexedDBBackingStore::Transaction::~Transaction() {
STLDeleteContainerPairSecondPointers(
blob_change_map_.begin(), blob_change_map_.end());
STLDeleteContainerPairSecondPointers(incognito_blob_map_.begin(),
incognito_blob_map_.end());
}
void IndexedDBBackingStore::Transaction::Begin() {
IDB_TRACE("IndexedDBBackingStore::Transaction::Begin");
DCHECK(!transaction_.get());
transaction_ = IndexedDBClassFactory::Get()->CreateLevelDBTransaction(
backing_store_->db_.get());
// If incognito, this snapshots blobs just as the above transaction_
// constructor snapshots the leveldb.
BlobChangeMap::const_iterator iter;
for (iter = backing_store_->incognito_blob_map_.begin();
iter != backing_store_->incognito_blob_map_.end();
++iter)
incognito_blob_map_[iter->first] = iter->second->Clone().release();
}
static GURL getURLFromUUID(const string& uuid) {
return GURL("blob:uuid/" + uuid);
}
leveldb::Status IndexedDBBackingStore::Transaction::HandleBlobPreTransaction(
BlobEntryKeyValuePairVec* new_blob_entries,
WriteDescriptorVec* new_files_to_write) {
if (backing_store_->is_incognito())
return leveldb::Status::OK();
BlobChangeMap::iterator iter = blob_change_map_.begin();
new_blob_entries->clear();
new_files_to_write->clear();
if (iter != blob_change_map_.end()) {
// Create LevelDBTransaction for the name generator seed and add-journal.
scoped_refptr<LevelDBTransaction> pre_transaction =
IndexedDBClassFactory::Get()->CreateLevelDBTransaction(
backing_store_->db_.get());
BlobJournalType journal;
for (; iter != blob_change_map_.end(); ++iter) {
std::vector<IndexedDBBlobInfo>::iterator info_iter;
std::vector<IndexedDBBlobInfo*> new_blob_keys;
for (info_iter = iter->second->mutable_blob_info().begin();
info_iter != iter->second->mutable_blob_info().end();
++info_iter) {
int64 next_blob_key = -1;
bool result = GetBlobKeyGeneratorCurrentNumber(
pre_transaction.get(), database_id_, &next_blob_key);
if (!result || next_blob_key < 0)
return InternalInconsistencyStatus();
BlobJournalEntryType journal_entry =
std::make_pair(database_id_, next_blob_key);
journal.push_back(journal_entry);
if (info_iter->is_file()) {
new_files_to_write->push_back(
WriteDescriptor(info_iter->file_path(),
next_blob_key,
info_iter->size(),
info_iter->last_modified()));
} else {
new_files_to_write->push_back(
WriteDescriptor(getURLFromUUID(info_iter->uuid()),
next_blob_key,
info_iter->size()));
}
info_iter->set_key(next_blob_key);
new_blob_keys.push_back(&*info_iter);
result = UpdateBlobKeyGeneratorCurrentNumber(
pre_transaction.get(), database_id_, next_blob_key + 1);
if (!result)
return InternalInconsistencyStatus();
}
BlobEntryKey blob_entry_key;
StringPiece key_piece(iter->second->key());
if (!BlobEntryKey::FromObjectStoreDataKey(&key_piece, &blob_entry_key)) {
NOTREACHED();
return InternalInconsistencyStatus();
}
new_blob_entries->push_back(
std::make_pair(blob_entry_key, EncodeBlobData(new_blob_keys)));
}
UpdatePrimaryJournalWithBlobList(pre_transaction.get(), journal);
leveldb::Status s = pre_transaction->Commit();
if (!s.ok())
return InternalInconsistencyStatus();
}
return leveldb::Status::OK();
}
bool IndexedDBBackingStore::Transaction::CollectBlobFilesToRemove() {
if (backing_store_->is_incognito())
return true;
BlobChangeMap::const_iterator iter = blob_change_map_.begin();
// Look up all old files to remove as part of the transaction, store their
// names in blobs_to_remove_, and remove their old blob data entries.
if (iter != blob_change_map_.end()) {
scoped_ptr<LevelDBIterator> db_iter = transaction_->CreateIterator();
for (; iter != blob_change_map_.end(); ++iter) {
BlobEntryKey blob_entry_key;
StringPiece key_piece(iter->second->key());
if (!BlobEntryKey::FromObjectStoreDataKey(&key_piece, &blob_entry_key)) {
NOTREACHED();
INTERNAL_WRITE_ERROR_UNTESTED(TRANSACTION_COMMIT_METHOD);
transaction_ = NULL;
return false;
}
if (database_id_ < 0)
database_id_ = blob_entry_key.database_id();
else
DCHECK_EQ(database_id_, blob_entry_key.database_id());
std::string blob_entry_key_bytes = blob_entry_key.Encode();
db_iter->Seek(blob_entry_key_bytes);
if (db_iter->IsValid() &&
!CompareKeys(db_iter->Key(), blob_entry_key_bytes)) {
std::vector<IndexedDBBlobInfo> blob_info;
if (!DecodeBlobData(db_iter->Value().as_string(), &blob_info)) {
INTERNAL_READ_ERROR_UNTESTED(TRANSACTION_COMMIT_METHOD);
transaction_ = NULL;
return false;
}
std::vector<IndexedDBBlobInfo>::iterator blob_info_iter;
for (blob_info_iter = blob_info.begin();
blob_info_iter != blob_info.end();
++blob_info_iter)
blobs_to_remove_.push_back(
std::make_pair(database_id_, blob_info_iter->key()));
transaction_->Remove(blob_entry_key_bytes);
}
}
}
return true;
}
leveldb::Status IndexedDBBackingStore::Transaction::SortBlobsToRemove() {
IndexedDBActiveBlobRegistry* registry =
backing_store_->active_blob_registry();
BlobJournalType::iterator iter;
BlobJournalType primary_journal, live_blob_journal;
for (iter = blobs_to_remove_.begin(); iter != blobs_to_remove_.end();
++iter) {
if (registry->MarkDeletedCheckIfUsed(iter->first, iter->second))
live_blob_journal.push_back(*iter);
else
primary_journal.push_back(*iter);
}
UpdatePrimaryJournalWithBlobList(transaction_.get(), primary_journal);
leveldb::Status s =
MergeBlobsIntoLiveBlobJournal(transaction_.get(), live_blob_journal);
if (!s.ok())
return s;
// To signal how many blobs need attention right now.
blobs_to_remove_.swap(primary_journal);
return leveldb::Status::OK();
}
leveldb::Status IndexedDBBackingStore::Transaction::CommitPhaseOne(
scoped_refptr<BlobWriteCallback> callback) {
IDB_TRACE("IndexedDBBackingStore::Transaction::CommitPhaseOne");
DCHECK(transaction_);
DCHECK(backing_store_->task_runner()->RunsTasksOnCurrentThread());
leveldb::Status s;
s = backing_store_->CleanUpBlobJournal(BlobJournalKey::Encode());
if (!s.ok()) {
INTERNAL_WRITE_ERROR(TRANSACTION_COMMIT_METHOD);
transaction_ = NULL;
return s;
}
BlobEntryKeyValuePairVec new_blob_entries;
WriteDescriptorVec new_files_to_write;
s = HandleBlobPreTransaction(&new_blob_entries, &new_files_to_write);
if (!s.ok()) {
INTERNAL_WRITE_ERROR_UNTESTED(TRANSACTION_COMMIT_METHOD);
transaction_ = NULL;
return s;
}
DCHECK(!new_files_to_write.size() ||
KeyPrefix::IsValidDatabaseId(database_id_));
if (!CollectBlobFilesToRemove()) {
INTERNAL_WRITE_ERROR_UNTESTED(TRANSACTION_COMMIT_METHOD);
transaction_ = NULL;
return InternalInconsistencyStatus();
}
if (new_files_to_write.size()) {
// This kicks off the writes of the new blobs, if any.
// This call will zero out new_blob_entries and new_files_to_write.
WriteNewBlobs(&new_blob_entries, &new_files_to_write, callback);
// Remove the add journal, if any; once the blobs are written, and we
// commit, this will do the cleanup.
ClearBlobJournal(transaction_.get(), BlobJournalKey::Encode());
} else {
callback->Run(true);
}
return leveldb::Status::OK();
}
leveldb::Status IndexedDBBackingStore::Transaction::CommitPhaseTwo() {
IDB_TRACE("IndexedDBBackingStore::Transaction::CommitPhaseTwo");
leveldb::Status s;
if (blobs_to_remove_.size()) {
s = SortBlobsToRemove();
if (!s.ok()) {
INTERNAL_READ_ERROR_UNTESTED(TRANSACTION_COMMIT_METHOD);
transaction_ = NULL;
return s;
}
}
s = transaction_->Commit();
transaction_ = NULL;
if (s.ok() && backing_store_->is_incognito() && !blob_change_map_.empty()) {
BlobChangeMap& target_map = backing_store_->incognito_blob_map_;
BlobChangeMap::iterator iter;
for (iter = blob_change_map_.begin(); iter != blob_change_map_.end();
++iter) {
BlobChangeMap::iterator target_record = target_map.find(iter->first);
if (target_record != target_map.end()) {
delete target_record->second;
target_map.erase(target_record);
}
if (iter->second) {
target_map[iter->first] = iter->second;
iter->second = NULL;
}
}
}
if (!s.ok())
INTERNAL_WRITE_ERROR(TRANSACTION_COMMIT_METHOD);
else if (blobs_to_remove_.size())
s = backing_store_->CleanUpBlobJournal(BlobJournalKey::Encode());
return s;
}
class IndexedDBBackingStore::Transaction::BlobWriteCallbackWrapper
: public IndexedDBBackingStore::BlobWriteCallback {
public:
BlobWriteCallbackWrapper(IndexedDBBackingStore::Transaction* transaction,
scoped_refptr<BlobWriteCallback> callback)
: transaction_(transaction), callback_(callback) {}
virtual void Run(bool succeeded) OVERRIDE {
callback_->Run(succeeded);
if (succeeded) // Else it's already been deleted during rollback.
transaction_->chained_blob_writer_ = NULL;
}
private:
virtual ~BlobWriteCallbackWrapper() {}
friend class base::RefCounted<IndexedDBBackingStore::BlobWriteCallback>;
IndexedDBBackingStore::Transaction* transaction_;
scoped_refptr<BlobWriteCallback> callback_;
DISALLOW_COPY_AND_ASSIGN(BlobWriteCallbackWrapper);
};
void IndexedDBBackingStore::Transaction::WriteNewBlobs(
BlobEntryKeyValuePairVec* new_blob_entries,
WriteDescriptorVec* new_files_to_write,
scoped_refptr<BlobWriteCallback> callback) {
DCHECK_GT(new_files_to_write->size(), 0UL);
DCHECK_GT(database_id_, 0);
BlobEntryKeyValuePairVec::iterator blob_entry_iter;
for (blob_entry_iter = new_blob_entries->begin();
blob_entry_iter != new_blob_entries->end();
++blob_entry_iter) {
// Add the new blob-table entry for each blob to the main transaction, or
// remove any entry that may exist if there's no new one.
if (!blob_entry_iter->second.size())
transaction_->Remove(blob_entry_iter->first.Encode());
else
transaction_->Put(blob_entry_iter->first.Encode(),
&blob_entry_iter->second);
}
// Creating the writer will start it going asynchronously.
chained_blob_writer_ =
new ChainedBlobWriterImpl(database_id_,
backing_store_,
new_files_to_write,
new BlobWriteCallbackWrapper(this, callback));
}
void IndexedDBBackingStore::Transaction::Rollback() {
IDB_TRACE("IndexedDBBackingStore::Transaction::Rollback");
if (chained_blob_writer_) {
chained_blob_writer_->Abort();
chained_blob_writer_ = NULL;
}
if (transaction_.get() == NULL)
return;
transaction_->Rollback();
transaction_ = NULL;
}
IndexedDBBackingStore::BlobChangeRecord::BlobChangeRecord(
const std::string& key,
int64 object_store_id)
: key_(key), object_store_id_(object_store_id) {
}
IndexedDBBackingStore::BlobChangeRecord::~BlobChangeRecord() {
}
void IndexedDBBackingStore::BlobChangeRecord::SetBlobInfo(
std::vector<IndexedDBBlobInfo>* blob_info) {
blob_info_.clear();
if (blob_info)
blob_info_.swap(*blob_info);
}
void IndexedDBBackingStore::BlobChangeRecord::SetHandles(
ScopedVector<webkit_blob::BlobDataHandle>* handles) {
handles_.clear();
if (handles)
handles_.swap(*handles);
}
scoped_ptr<IndexedDBBackingStore::BlobChangeRecord>
IndexedDBBackingStore::BlobChangeRecord::Clone() const {
scoped_ptr<IndexedDBBackingStore::BlobChangeRecord> record(
new BlobChangeRecord(key_, object_store_id_));
record->blob_info_ = blob_info_;
ScopedVector<webkit_blob::BlobDataHandle>::const_iterator iter;
for (iter = handles_.begin(); iter != handles_.end(); ++iter)
record->handles_.push_back(new webkit_blob::BlobDataHandle(**iter));
return record.Pass();
}
leveldb::Status IndexedDBBackingStore::Transaction::PutBlobInfoIfNeeded(
int64 database_id,
int64 object_store_id,
const std::string& object_store_data_key,
std::vector<IndexedDBBlobInfo>* blob_info,
ScopedVector<webkit_blob::BlobDataHandle>* handles) {
if (!blob_info || blob_info->empty()) {
blob_change_map_.erase(object_store_data_key);
incognito_blob_map_.erase(object_store_data_key);
BlobEntryKey blob_entry_key;
StringPiece leveldb_key_piece(object_store_data_key);
if (!BlobEntryKey::FromObjectStoreDataKey(&leveldb_key_piece,
&blob_entry_key)) {
NOTREACHED();
return InternalInconsistencyStatus();
}
std::string value;
bool found = false;
leveldb::Status s =
transaction()->Get(blob_entry_key.Encode(), &value, &found);
if (!s.ok())
return s;
if (!found)
return leveldb::Status::OK();
}
PutBlobInfo(
database_id, object_store_id, object_store_data_key, blob_info, handles);
return leveldb::Status::OK();
}
// This is storing an info, even if empty, even if the previous key had no blob
// info that we know of. It duplicates a bunch of information stored in the
// leveldb transaction, but only w.r.t. the user keys altered--we don't keep the
// changes to exists or index keys here.
void IndexedDBBackingStore::Transaction::PutBlobInfo(
int64 database_id,
int64 object_store_id,
const std::string& object_store_data_key,
std::vector<IndexedDBBlobInfo>* blob_info,
ScopedVector<webkit_blob::BlobDataHandle>* handles) {
DCHECK_GT(object_store_data_key.size(), 0UL);
if (database_id_ < 0)
database_id_ = database_id;
DCHECK_EQ(database_id_, database_id);
BlobChangeMap::iterator it = blob_change_map_.find(object_store_data_key);
BlobChangeRecord* record = NULL;
if (it == blob_change_map_.end()) {
record = new BlobChangeRecord(object_store_data_key, object_store_id);
blob_change_map_[object_store_data_key] = record;
} else {
record = it->second;
}
DCHECK_EQ(record->object_store_id(), object_store_id);
record->SetBlobInfo(blob_info);
record->SetHandles(handles);
DCHECK(!handles || !handles->size());
}
IndexedDBBackingStore::Transaction::WriteDescriptor::WriteDescriptor(
const GURL& url,
int64_t key,
int64_t size)
: is_file_(false), url_(url), key_(key), size_(size) {
}
IndexedDBBackingStore::Transaction::WriteDescriptor::WriteDescriptor(
const FilePath& file_path,
int64_t key,
int64_t size,
base::Time last_modified)
: is_file_(true),
file_path_(file_path),
key_(key),
size_(size),
last_modified_(last_modified) {
}
} // namespace content