AbstractDatabase.cpp [plain text]
#include "config.h"
#include "AbstractDatabase.h"
#if ENABLE(DATABASE)
#include "DatabaseAuthorizer.h"
#include "DatabaseTracker.h"
#include "Logging.h"
#include "SQLiteStatement.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
static bool retrieveTextResultFromDatabase(SQLiteDatabase& db, const String& query, String& resultString)
{
SQLiteStatement statement(db, query);
int result = statement.prepare();
if (result != SQLResultOk) {
LOG_ERROR("Error (%i) preparing statement to read text result from database (%s)", result, query.ascii().data());
return false;
}
result = statement.step();
if (result == SQLResultRow) {
resultString = statement.getColumnText(0);
return true;
}
if (result == SQLResultDone) {
resultString = String();
return true;
}
LOG_ERROR("Error (%i) reading text result from database (%s)", result, query.ascii().data());
return false;
}
static bool setTextValueInDatabase(SQLiteDatabase& db, const String& query, const String& value)
{
SQLiteStatement statement(db, query);
int result = statement.prepare();
if (result != SQLResultOk) {
LOG_ERROR("Failed to prepare statement to set value in database (%s)", query.ascii().data());
return false;
}
statement.bindText(1, value);
result = statement.step();
if (result != SQLResultDone) {
LOG_ERROR("Failed to step statement to set value in database (%s)", query.ascii().data());
return false;
}
return true;
}
static Mutex& guidMutex()
{
DEFINE_STATIC_LOCAL(Mutex, mutex, ());
return mutex;
}
typedef HashMap<int, String> GuidVersionMap;
static GuidVersionMap& guidToVersionMap()
{
DEFINE_STATIC_LOCAL(GuidVersionMap, map, ());
return map;
}
static inline void updateGuidVersionMap(int guid, String newVersion)
{
ASSERT(!guidMutex().tryLock());
guidToVersionMap().set(guid, newVersion.isEmpty() ? String() : newVersion.threadsafeCopy());
}
typedef HashMap<int, HashSet<AbstractDatabase*>*> GuidDatabaseMap;
static GuidDatabaseMap& guidToDatabaseMap()
{
DEFINE_STATIC_LOCAL(GuidDatabaseMap, map, ());
return map;
}
static int guidForOriginAndName(const String& origin, const String& name)
{
String stringID = origin + "/" + name;
DEFINE_STATIC_LOCAL(Mutex, stringIdentifierMutex, ());
MutexLocker locker(stringIdentifierMutex);
typedef HashMap<String, int> IDGuidMap;
DEFINE_STATIC_LOCAL(IDGuidMap, stringIdentifierToGUIDMap, ());
int guid = stringIdentifierToGUIDMap.get(stringID);
if (!guid) {
static int currentNewGUID = 1;
guid = currentNewGUID++;
stringIdentifierToGUIDMap.set(stringID, guid);
}
return guid;
}
static bool isDatabaseAvailable = true;
bool AbstractDatabase::isAvailable()
{
return isDatabaseAvailable;
}
void AbstractDatabase::setIsAvailable(bool available)
{
isDatabaseAvailable = available;
}
const String& AbstractDatabase::databaseInfoTableName()
{
DEFINE_STATIC_LOCAL(String, name, ("__WebKitDatabaseInfoTable__"));
return name;
}
AbstractDatabase::AbstractDatabase(ScriptExecutionContext* context, const String& name, const String& expectedVersion,
const String& displayName, unsigned long estimatedSize)
: m_scriptExecutionContext(context)
, m_name(name.crossThreadString())
, m_expectedVersion(expectedVersion.crossThreadString())
, m_displayName(displayName.crossThreadString())
, m_estimatedSize(estimatedSize)
, m_guid(0)
, m_opened(false)
, m_new(false)
{
ASSERT(context->isContextThread());
m_contextThreadSecurityOrigin = m_scriptExecutionContext->securityOrigin();
m_databaseAuthorizer = DatabaseAuthorizer::create(databaseInfoTableName());
if (m_name.isNull())
m_name = "";
m_guid = guidForOriginAndName(securityOrigin()->toString(), name);
{
MutexLocker locker(guidMutex());
HashSet<AbstractDatabase*>* hashSet = guidToDatabaseMap().get(m_guid);
if (!hashSet) {
hashSet = new HashSet<AbstractDatabase*>;
guidToDatabaseMap().set(m_guid, hashSet);
}
hashSet->add(this);
}
m_filename = DatabaseTracker::tracker().fullPathForDatabase(securityOrigin(), m_name);
DatabaseTracker::tracker().addOpenDatabase(this);
}
AbstractDatabase::~AbstractDatabase()
{
}
void AbstractDatabase::closeDatabase()
{
if (!m_opened)
return;
m_sqliteDatabase.close();
m_opened = false;
{
MutexLocker locker(guidMutex());
HashSet<AbstractDatabase*>* hashSet = guidToDatabaseMap().get(m_guid);
ASSERT(hashSet);
ASSERT(hashSet->contains(this));
hashSet->remove(this);
if (hashSet->isEmpty()) {
guidToDatabaseMap().remove(m_guid);
delete hashSet;
guidToVersionMap().remove(m_guid);
}
}
}
String AbstractDatabase::version() const
{
MutexLocker locker(guidMutex());
return guidToVersionMap().get(m_guid).threadsafeCopy();
}
static const int maxSqliteBusyWaitTime = 30000;
bool AbstractDatabase::performOpenAndVerify(bool shouldSetVersionInNewDatabase, ExceptionCode& ec)
{
if (!m_sqliteDatabase.open(m_filename, true)) {
LOG_ERROR("Unable to open database at path %s", m_filename.ascii().data());
ec = INVALID_STATE_ERR;
return false;
}
if (!m_sqliteDatabase.turnOnIncrementalAutoVacuum())
LOG_ERROR("Unable to turn on incremental auto-vacuum for database %s", m_filename.ascii().data());
ASSERT(m_databaseAuthorizer);
m_sqliteDatabase.setAuthorizer(m_databaseAuthorizer);
m_sqliteDatabase.setBusyTimeout(maxSqliteBusyWaitTime);
String currentVersion;
{
MutexLocker locker(guidMutex());
GuidVersionMap::iterator entry = guidToVersionMap().find(m_guid);
if (entry != guidToVersionMap().end()) {
currentVersion = entry->second.isNull() ? String("") : entry->second;
LOG(StorageAPI, "Current cached version for guid %i is %s", m_guid, currentVersion.ascii().data());
} else {
LOG(StorageAPI, "No cached version for guid %i", m_guid);
if (!m_sqliteDatabase.tableExists(databaseInfoTableName())) {
m_new = true;
if (!m_sqliteDatabase.executeCommand("CREATE TABLE " + databaseInfoTableName() + " (key TEXT NOT NULL ON CONFLICT FAIL UNIQUE ON CONFLICT REPLACE,value TEXT NOT NULL ON CONFLICT FAIL);")) {
LOG_ERROR("Unable to create table %s in database %s", databaseInfoTableName().ascii().data(), databaseDebugName().ascii().data());
ec = INVALID_STATE_ERR;
m_sqliteDatabase.close();
return false;
}
}
if (!getVersionFromDatabase(currentVersion)) {
LOG_ERROR("Failed to get current version from database %s", databaseDebugName().ascii().data());
ec = INVALID_STATE_ERR;
m_sqliteDatabase.close();
return false;
}
if (currentVersion.length()) {
LOG(StorageAPI, "Retrieved current version %s from database %s", currentVersion.ascii().data(), databaseDebugName().ascii().data());
} else if (!m_new || shouldSetVersionInNewDatabase) {
LOG(StorageAPI, "Setting version %s in database %s that was just created", m_expectedVersion.ascii().data(), databaseDebugName().ascii().data());
if (!setVersionInDatabase(m_expectedVersion)) {
LOG_ERROR("Failed to set version %s in database %s", m_expectedVersion.ascii().data(), databaseDebugName().ascii().data());
ec = INVALID_STATE_ERR;
m_sqliteDatabase.close();
return false;
}
currentVersion = m_expectedVersion;
}
updateGuidVersionMap(m_guid, currentVersion);
}
}
if (currentVersion.isNull()) {
LOG(StorageAPI, "Database %s does not have its version set", databaseDebugName().ascii().data());
currentVersion = "";
}
if ((!m_new || shouldSetVersionInNewDatabase) && m_expectedVersion.length() && m_expectedVersion != currentVersion) {
LOG(StorageAPI, "page expects version %s from database %s, which actually has version name %s - openDatabase() call will fail", m_expectedVersion.ascii().data(),
databaseDebugName().ascii().data(), currentVersion.ascii().data());
ec = INVALID_STATE_ERR;
m_sqliteDatabase.close();
return false;
}
m_opened = true;
return true;
}
ScriptExecutionContext* AbstractDatabase::scriptExecutionContext() const
{
return m_scriptExecutionContext.get();
}
SecurityOrigin* AbstractDatabase::securityOrigin() const
{
return m_contextThreadSecurityOrigin.get();
}
String AbstractDatabase::stringIdentifier() const
{
return m_name.threadsafeCopy();
}
String AbstractDatabase::displayName() const
{
return m_displayName.threadsafeCopy();
}
unsigned long AbstractDatabase::estimatedSize() const
{
return m_estimatedSize;
}
String AbstractDatabase::fileName() const
{
return m_filename.threadsafeCopy();
}
const String& AbstractDatabase::databaseVersionKey()
{
DEFINE_STATIC_LOCAL(String, key, ("WebKitDatabaseVersionKey"));
return key;
}
bool AbstractDatabase::getVersionFromDatabase(String& version)
{
DEFINE_STATIC_LOCAL(String, getVersionQuery, ("SELECT value FROM " + databaseInfoTableName() + " WHERE key = '" + databaseVersionKey() + "';"));
m_databaseAuthorizer->disable();
bool result = retrieveTextResultFromDatabase(m_sqliteDatabase, getVersionQuery.threadsafeCopy(), version);
if (!result)
LOG_ERROR("Failed to retrieve version from database %s", databaseDebugName().ascii().data());
m_databaseAuthorizer->enable();
return result;
}
bool AbstractDatabase::setVersionInDatabase(const String& version)
{
DEFINE_STATIC_LOCAL(String, setVersionQuery, ("INSERT INTO " + databaseInfoTableName() + " (key, value) VALUES ('" + databaseVersionKey() + "', ?);"));
m_databaseAuthorizer->disable();
bool result = setTextValueInDatabase(m_sqliteDatabase, setVersionQuery.threadsafeCopy(), version);
if (!result)
LOG_ERROR("Failed to set version %s in database (%s)", version.ascii().data(), setVersionQuery.ascii().data());
m_databaseAuthorizer->enable();
return result;
}
bool AbstractDatabase::versionMatchesExpected() const
{
if (!m_expectedVersion.isEmpty()) {
MutexLocker locker(guidMutex());
return m_expectedVersion == guidToVersionMap().get(m_guid);
}
return true;
}
void AbstractDatabase::setExpectedVersion(const String& version)
{
m_expectedVersion = version.threadsafeCopy();
MutexLocker locker(guidMutex());
updateGuidVersionMap(m_guid, version);
}
void AbstractDatabase::disableAuthorizer()
{
ASSERT(m_databaseAuthorizer);
m_databaseAuthorizer->disable();
}
void AbstractDatabase::enableAuthorizer()
{
ASSERT(m_databaseAuthorizer);
m_databaseAuthorizer->enable();
}
void AbstractDatabase::setAuthorizerReadOnly()
{
ASSERT(m_databaseAuthorizer);
m_databaseAuthorizer->setReadOnly();
}
void AbstractDatabase::setAuthorizerPermissions(int permissions)
{
ASSERT(m_databaseAuthorizer);
m_databaseAuthorizer->setPermissions(permissions);
}
bool AbstractDatabase::lastActionChangedDatabase()
{
ASSERT(m_databaseAuthorizer);
return m_databaseAuthorizer->lastActionChangedDatabase();
}
bool AbstractDatabase::lastActionWasInsert()
{
ASSERT(m_databaseAuthorizer);
return m_databaseAuthorizer->lastActionWasInsert();
}
void AbstractDatabase::resetDeletes()
{
ASSERT(m_databaseAuthorizer);
m_databaseAuthorizer->resetDeletes();
}
bool AbstractDatabase::hadDeletes()
{
ASSERT(m_databaseAuthorizer);
return m_databaseAuthorizer->hadDeletes();
}
void AbstractDatabase::resetAuthorizer()
{
if (m_databaseAuthorizer)
m_databaseAuthorizer->reset();
}
unsigned long long AbstractDatabase::maximumSize() const
{
return DatabaseTracker::tracker().getMaxSizeForDatabase(this);
}
void AbstractDatabase::incrementalVacuumIfNeeded()
{
int64_t freeSpaceSize = m_sqliteDatabase.freeSpaceSize();
int64_t totalSize = m_sqliteDatabase.totalSize();
if (totalSize <= 10 * freeSpaceSize)
m_sqliteDatabase.runIncrementalVacuumCommand();
}
void AbstractDatabase::interrupt()
{
m_sqliteDatabase.interrupt();
}
bool AbstractDatabase::isInterrupted()
{
MutexLocker locker(m_sqliteDatabase.databaseMutex());
return m_sqliteDatabase.isInterrupted();
}
}
#endif // ENABLE(DATABASE)