262 lines
8.1 KiB
PHP
262 lines
8.1 KiB
PHP
<?php
|
|
/**
|
|
* @author Andreas Fischer <bantu@owncloud.com>
|
|
* @author Bart Visscher <bartv@thisnet.nl>
|
|
* @author Dan Bartram <daneybartram@gmail.com>
|
|
* @author Joas Schilling <nickvergessen@owncloud.com>
|
|
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
|
|
* @author Morris Jobke <hey@morrisjobke.de>
|
|
* @author Robin Appelman <icewind@owncloud.com>
|
|
* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
|
|
* @author Thomas Müller <thomas.mueller@tmit.eu>
|
|
* @author Tom Needham <tom@owncloud.com>
|
|
* @author Vincent Petry <pvince81@owncloud.com>
|
|
*
|
|
* @copyright Copyright (c) 2015, ownCloud, Inc.
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* This class manages the access to the database. It basically is a wrapper for
|
|
* Doctrine with some adaptions.
|
|
*/
|
|
class OC_DB {
|
|
|
|
/**
|
|
* get MDB2 schema manager
|
|
*
|
|
* @return \OC\DB\MDB2SchemaManager
|
|
*/
|
|
private static function getMDB2SchemaManager() {
|
|
return new \OC\DB\MDB2SchemaManager(\OC::$server->getDatabaseConnection());
|
|
}
|
|
|
|
/**
|
|
* Prepare a SQL query
|
|
* @param string $query Query string
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @param bool $isManipulation
|
|
* @throws \OC\DatabaseException
|
|
* @return OC_DB_StatementWrapper prepared SQL query
|
|
*
|
|
* SQL query via Doctrine prepare(), needs to be execute()'d!
|
|
*/
|
|
static public function prepare( $query , $limit = null, $offset = null, $isManipulation = null) {
|
|
$connection = \OC::$server->getDatabaseConnection();
|
|
|
|
if ($isManipulation === null) {
|
|
//try to guess, so we return the number of rows on manipulations
|
|
$isManipulation = self::isManipulation($query);
|
|
}
|
|
|
|
// return the result
|
|
try {
|
|
$result =$connection->prepare($query, $limit, $offset);
|
|
} catch (\Doctrine\DBAL\DBALException $e) {
|
|
throw new \OC\DatabaseException($e->getMessage(), $query);
|
|
}
|
|
// differentiate between query and manipulation
|
|
$result = new OC_DB_StatementWrapper($result, $isManipulation);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* tries to guess the type of statement based on the first 10 characters
|
|
* the current check allows some whitespace but does not work with IF EXISTS or other more complex statements
|
|
*
|
|
* @param string $sql
|
|
* @return bool
|
|
*/
|
|
static public function isManipulation( $sql ) {
|
|
$selectOccurrence = stripos($sql, 'SELECT');
|
|
if ($selectOccurrence !== false && $selectOccurrence < 10) {
|
|
return false;
|
|
}
|
|
$insertOccurrence = stripos($sql, 'INSERT');
|
|
if ($insertOccurrence !== false && $insertOccurrence < 10) {
|
|
return true;
|
|
}
|
|
$updateOccurrence = stripos($sql, 'UPDATE');
|
|
if ($updateOccurrence !== false && $updateOccurrence < 10) {
|
|
return true;
|
|
}
|
|
$deleteOccurrence = stripos($sql, 'DELETE');
|
|
if ($deleteOccurrence !== false && $deleteOccurrence < 10) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* execute a prepared statement, on error write log and throw exception
|
|
* @param mixed $stmt OC_DB_StatementWrapper,
|
|
* an array with 'sql' and optionally 'limit' and 'offset' keys
|
|
* .. or a simple sql query string
|
|
* @param array $parameters
|
|
* @return OC_DB_StatementWrapper
|
|
* @throws \OC\DatabaseException
|
|
*/
|
|
static public function executeAudited( $stmt, array $parameters = null) {
|
|
if (is_string($stmt)) {
|
|
// convert to an array with 'sql'
|
|
if (stripos($stmt, 'LIMIT') !== false) { //OFFSET requires LIMIT, so we only need to check for LIMIT
|
|
// TODO try to convert LIMIT OFFSET notation to parameters
|
|
$message = 'LIMIT and OFFSET are forbidden for portability reasons,'
|
|
. ' pass an array with \'limit\' and \'offset\' instead';
|
|
throw new \OC\DatabaseException($message);
|
|
}
|
|
$stmt = array('sql' => $stmt, 'limit' => null, 'offset' => null);
|
|
}
|
|
if (is_array($stmt)) {
|
|
// convert to prepared statement
|
|
if ( ! array_key_exists('sql', $stmt) ) {
|
|
$message = 'statement array must at least contain key \'sql\'';
|
|
throw new \OC\DatabaseException($message);
|
|
}
|
|
if ( ! array_key_exists('limit', $stmt) ) {
|
|
$stmt['limit'] = null;
|
|
}
|
|
if ( ! array_key_exists('limit', $stmt) ) {
|
|
$stmt['offset'] = null;
|
|
}
|
|
$stmt = self::prepare($stmt['sql'], $stmt['limit'], $stmt['offset']);
|
|
}
|
|
self::raiseExceptionOnError($stmt, 'Could not prepare statement');
|
|
if ($stmt instanceof OC_DB_StatementWrapper) {
|
|
$result = $stmt->execute($parameters);
|
|
self::raiseExceptionOnError($result, 'Could not execute statement');
|
|
} else {
|
|
if (is_object($stmt)) {
|
|
$message = 'Expected a prepared statement or array got ' . get_class($stmt);
|
|
} else {
|
|
$message = 'Expected a prepared statement or array got ' . gettype($stmt);
|
|
}
|
|
throw new \OC\DatabaseException($message);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* saves database schema to xml file
|
|
* @param string $file name of file
|
|
* @param int $mode
|
|
* @return bool
|
|
*
|
|
* TODO: write more documentation
|
|
*/
|
|
public static function getDbStructure($file) {
|
|
$schemaManager = self::getMDB2SchemaManager();
|
|
return $schemaManager->getDbStructure($file);
|
|
}
|
|
|
|
/**
|
|
* Creates tables from XML file
|
|
* @param string $file file to read structure from
|
|
* @return bool
|
|
*
|
|
* TODO: write more documentation
|
|
*/
|
|
public static function createDbFromStructure( $file ) {
|
|
$schemaManager = self::getMDB2SchemaManager();
|
|
$result = $schemaManager->createDbFromStructure($file);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* update the database schema
|
|
* @param string $file file to read structure from
|
|
* @throws Exception
|
|
* @return string|boolean
|
|
*/
|
|
public static function updateDbFromStructure($file) {
|
|
$schemaManager = self::getMDB2SchemaManager();
|
|
try {
|
|
$result = $schemaManager->updateDbFromStructure($file);
|
|
} catch (Exception $e) {
|
|
\OCP\Util::writeLog('core', 'Failed to update database structure ('.$e.')', \OCP\Util::FATAL);
|
|
throw $e;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* simulate the database schema update
|
|
* @param string $file file to read structure from
|
|
* @throws Exception
|
|
* @return string|boolean
|
|
*/
|
|
public static function simulateUpdateDbFromStructure($file) {
|
|
$schemaManager = self::getMDB2SchemaManager();
|
|
try {
|
|
$result = $schemaManager->simulateUpdateDbFromStructure($file);
|
|
} catch (Exception $e) {
|
|
\OCP\Util::writeLog('core', 'Simulated database structure update failed ('.$e.')', \OCP\Util::FATAL);
|
|
throw $e;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* remove all tables defined in a database structure xml file
|
|
* @param string $file the xml file describing the tables
|
|
*/
|
|
public static function removeDBStructure($file) {
|
|
$schemaManager = self::getMDB2SchemaManager();
|
|
$schemaManager->removeDBStructure($file);
|
|
}
|
|
|
|
/**
|
|
* check if a result is an error and throws an exception, works with \Doctrine\DBAL\DBALException
|
|
* @param mixed $result
|
|
* @param string $message
|
|
* @return void
|
|
* @throws \OC\DatabaseException
|
|
*/
|
|
public static function raiseExceptionOnError($result, $message = null) {
|
|
if($result === false) {
|
|
if ($message === null) {
|
|
$message = self::getErrorMessage();
|
|
} else {
|
|
$message .= ', Root cause:' . self::getErrorMessage();
|
|
}
|
|
throw new \OC\DatabaseException($message, \OC::$server->getDatabaseConnection()->errorCode());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* returns the error code and message as a string for logging
|
|
* works with DoctrineException
|
|
* @return string
|
|
*/
|
|
public static function getErrorMessage() {
|
|
$connection = \OC::$server->getDatabaseConnection();
|
|
return $connection->getError();
|
|
}
|
|
|
|
/**
|
|
* Checks if a table exists in the database - the database prefix will be prepended
|
|
*
|
|
* @param string $table
|
|
* @return bool
|
|
* @throws \OC\DatabaseException
|
|
*/
|
|
public static function tableExists($table) {
|
|
$connection = \OC::$server->getDatabaseConnection();
|
|
return $connection->tableExists($table);
|
|
}
|
|
}
|