1164 lines
34 KiB
PHP
1164 lines
34 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Frank Karlitschek
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* @copyright 2012 Frank Karlitschek frank@owncloud.org
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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class DatabaseException extends Exception{
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private $query;
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//FIXME getQuery seems to be unused, maybe use parent constructor with $message, $code and $previous
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public function __construct($message, $query = null){
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parent::__construct($message);
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$this->query = $query;
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}
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public function getQuery(){
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return $this->query;
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}
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}
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/**
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* This class manages the access to the database. It basically is a wrapper for
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* MDB2 with some adaptions.
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*/
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class OC_DB {
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const BACKEND_PDO=0;
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const BACKEND_MDB2=1;
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static private $preparedQueries = array();
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static private $cachingEnabled = true;
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/**
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* @var MDB2_Driver_Common
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*/
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static private $connection; //the prefered connection to use, either PDO or MDB2
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static private $backend=null;
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/**
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* @var MDB2_Driver_Common
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*/
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static private $MDB2=null;
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/**
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* @var PDO
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*/
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static private $PDO=null;
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/**
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* @var MDB2_Schema
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*/
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static private $schema=null;
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static private $inTransaction=false;
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static private $prefix=null;
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static private $type=null;
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/**
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* check which backend we should use
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* @return int BACKEND_MDB2 or BACKEND_PDO
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*/
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private static function getDBBackend() {
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//check if we can use PDO, else use MDB2 (installation always needs to be done my mdb2)
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if(class_exists('PDO') && OC_Config::getValue('installed', false)) {
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$type = OC_Config::getValue( "dbtype", "sqlite" );
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if($type=='oci') { //oracle also always needs mdb2
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return self::BACKEND_MDB2;
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}
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if($type=='sqlite3') $type='sqlite';
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$drivers=PDO::getAvailableDrivers();
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if(array_search($type, $drivers)!==false) {
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return self::BACKEND_PDO;
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}
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}
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return self::BACKEND_MDB2;
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}
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/**
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* @brief connects to the database
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* @param int $backend
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* @return bool true if connection can be established or false on error
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*
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* Connects to the database as specified in config.php
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*/
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public static function connect($backend=null) {
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if(self::$connection) {
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return true;
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}
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if(is_null($backend)) {
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$backend=self::getDBBackend();
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}
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if($backend==self::BACKEND_PDO) {
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$success = self::connectPDO();
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self::$connection=self::$PDO;
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self::$backend=self::BACKEND_PDO;
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}else{
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$success = self::connectMDB2();
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self::$connection=self::$MDB2;
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self::$backend=self::BACKEND_MDB2;
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}
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return $success;
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}
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/**
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* connect to the database using pdo
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*
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* @return bool
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*/
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public static function connectPDO() {
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if(self::$connection) {
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if(self::$backend==self::BACKEND_MDB2) {
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self::disconnect();
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}else{
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return true;
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}
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}
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self::$preparedQueries = array();
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// The global data we need
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$name = OC_Config::getValue( "dbname", "owncloud" );
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$host = OC_Config::getValue( "dbhost", "" );
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$user = OC_Config::getValue( "dbuser", "" );
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$pass = OC_Config::getValue( "dbpassword", "" );
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$type = OC_Config::getValue( "dbtype", "sqlite" );
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if(strpos($host, ':')) {
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list($host, $port)=explode(':', $host, 2);
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}else{
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$port=false;
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}
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$opts = array();
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$datadir=OC_Config::getValue( "datadirectory", OC::$SERVERROOT.'/data' );
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// do nothing if the connection already has been established
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if(!self::$PDO) {
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// Add the dsn according to the database type
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switch($type) {
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case 'sqlite':
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$dsn='sqlite2:'.$datadir.'/'.$name.'.db';
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break;
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case 'sqlite3':
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$dsn='sqlite:'.$datadir.'/'.$name.'.db';
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break;
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case 'mysql':
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if($port) {
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$dsn='mysql:dbname='.$name.';host='.$host.';port='.$port;
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}else{
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$dsn='mysql:dbname='.$name.';host='.$host;
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}
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$opts[PDO::MYSQL_ATTR_INIT_COMMAND] = "SET NAMES 'UTF8'";
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break;
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case 'pgsql':
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if($port) {
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$dsn='pgsql:dbname='.$name.';host='.$host.';port='.$port;
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}else{
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$dsn='pgsql:dbname='.$name.';host='.$host;
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}
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/**
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* Ugly fix for pg connections pbm when password use spaces
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*/
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$e_user = addslashes($user);
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$e_password = addslashes($pass);
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$pass = $user = null;
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$dsn .= ";user='$e_user';password='$e_password'";
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/** END OF FIX***/
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break;
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case 'oci': // Oracle with PDO is unsupported
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if ($port) {
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$dsn = 'oci:dbname=//' . $host . ':' . $port . '/' . $name;
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} else {
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$dsn = 'oci:dbname=//' . $host . '/' . $name;
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}
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break;
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case 'mssql':
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if ($port) {
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$dsn='sqlsrv:Server='.$host.','.$port.';Database='.$name;
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} else {
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$dsn='sqlsrv:Server='.$host.';Database='.$name;
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}
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break;
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default:
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return false;
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}
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try{
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self::$PDO=new PDO($dsn, $user, $pass, $opts);
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}catch(PDOException $e) {
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OC_Log::write('core', $e->getMessage(), OC_Log::FATAL);
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OC_User::setUserId(null);
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// send http status 503
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header('HTTP/1.1 503 Service Temporarily Unavailable');
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header('Status: 503 Service Temporarily Unavailable');
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OC_Template::printErrorPage('Failed to connect to database');
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die();
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}
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// We always, really always want associative arrays
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self::$PDO->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
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self::$PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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}
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return true;
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}
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/**
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* connect to the database using mdb2
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*/
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public static function connectMDB2() {
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if(self::$connection) {
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if(self::$backend==self::BACKEND_PDO) {
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self::disconnect();
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}else{
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return true;
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}
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}
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self::$preparedQueries = array();
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// The global data we need
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$name = OC_Config::getValue( "dbname", "owncloud" );
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$host = OC_Config::getValue( "dbhost", "" );
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$user = OC_Config::getValue( "dbuser", "" );
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$pass = OC_Config::getValue( "dbpassword", "" );
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$type = OC_Config::getValue( "dbtype", "sqlite" );
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$SERVERROOT=OC::$SERVERROOT;
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$datadir=OC_Config::getValue( "datadirectory", "$SERVERROOT/data" );
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// do nothing if the connection already has been established
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if(!self::$MDB2) {
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// Require MDB2.php (not required in the head of the file so we only load it when needed)
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require_once 'MDB2.php';
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// Prepare options array
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$options = array(
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'portability' => MDB2_PORTABILITY_ALL - MDB2_PORTABILITY_FIX_CASE,
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'log_line_break' => '<br>',
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'idxname_format' => '%s',
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'debug' => true,
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'quote_identifier' => true
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);
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// Add the dsn according to the database type
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switch($type) {
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case 'sqlite':
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case 'sqlite3':
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$dsn = array(
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'phptype' => $type,
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'database' => "$datadir/$name.db",
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'mode' => '0644'
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);
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break;
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case 'mysql':
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$dsn = array(
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'phptype' => 'mysql',
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'username' => $user,
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'password' => $pass,
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'hostspec' => $host,
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'database' => $name
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);
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break;
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case 'pgsql':
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$dsn = array(
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'phptype' => 'pgsql',
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'username' => $user,
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'password' => $pass,
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'hostspec' => $host,
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'database' => $name
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);
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break;
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case 'oci':
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$dsn = array(
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'phptype' => 'oci8',
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'username' => $user,
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'password' => $pass,
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'service' => $name,
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'hostspec' => $host,
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'charset' => 'AL32UTF8',
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);
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break;
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case 'mssql':
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$dsn = array(
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'phptype' => 'sqlsrv',
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'username' => $user,
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'password' => $pass,
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'hostspec' => $host,
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'database' => $name,
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'charset' => 'UTF-8'
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);
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$options['portability'] = $options['portability'] - MDB2_PORTABILITY_EMPTY_TO_NULL;
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break;
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default:
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return false;
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}
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// Try to establish connection
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self::$MDB2 = MDB2::factory( $dsn, $options );
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// Die if we could not connect
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if( PEAR::isError( self::$MDB2 )) {
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OC_Log::write('core', self::$MDB2->getUserInfo(), OC_Log::FATAL);
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OC_Log::write('core', self::$MDB2->getMessage(), OC_Log::FATAL);
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OC_User::setUserId(null);
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// send http status 503
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header('HTTP/1.1 503 Service Temporarily Unavailable');
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header('Status: 503 Service Temporarily Unavailable');
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OC_Template::printErrorPage('Failed to connect to database');
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die();
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}
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// We always, really always want associative arrays
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self::$MDB2->setFetchMode(MDB2_FETCHMODE_ASSOC);
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}
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// we are done. great!
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return true;
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}
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/**
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* @brief Prepare a SQL query
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* @param string $query Query string
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* @param int $limit
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* @param int $offset
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* @return MDB2_Statement_Common prepared SQL query
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*
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* SQL query via MDB2 prepare(), needs to be execute()'d!
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*/
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static public function prepare( $query , $limit=null, $offset=null ) {
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if (!is_null($limit) && $limit != -1) {
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if (self::$backend == self::BACKEND_MDB2) {
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//MDB2 uses or emulates limits & offset internally
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self::$MDB2->setLimit($limit, $offset);
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} else {
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//PDO does not handle limit and offset.
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//FIXME: check limit notation for other dbs
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//the following sql thus might needs to take into account db ways of representing it
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//(oracle has no LIMIT / OFFSET)
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$limit = (int)$limit;
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$limitsql = ' LIMIT ' . $limit;
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if (!is_null($offset)) {
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$offset = (int)$offset;
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$limitsql .= ' OFFSET ' . $offset;
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}
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//insert limitsql
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if (substr($query, -1) == ';') { //if query ends with ;
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$query = substr($query, 0, -1) . $limitsql . ';';
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} else {
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$query.=$limitsql;
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}
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}
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} else {
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if (isset(self::$preparedQueries[$query]) and self::$cachingEnabled) {
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return self::$preparedQueries[$query];
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}
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}
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$rawQuery = $query;
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// Optimize the query
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$query = self::processQuery( $query );
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if(OC_Config::getValue( "log_query", false)) {
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OC_Log::write('core', 'DB prepare : '.$query, OC_Log::DEBUG);
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}
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self::connect();
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// return the result
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if(self::$backend==self::BACKEND_MDB2) {
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$result = self::$connection->prepare( $query );
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// Die if we have an error (error means: bad query, not 0 results!)
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if( PEAR::isError($result)) {
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throw new DatabaseException($result->getMessage(), $query);
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}
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}else{
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try{
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$result=self::$connection->prepare($query);
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}catch(PDOException $e) {
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throw new DatabaseException($e->getMessage(), $query);
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}
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$result=new PDOStatementWrapper($result);
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}
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if ((is_null($limit) || $limit == -1) and self::$cachingEnabled ) {
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$type = OC_Config::getValue( "dbtype", "sqlite" );
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if( $type != 'sqlite' && $type != 'sqlite3' ) {
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self::$preparedQueries[$rawQuery] = $result;
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}
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}
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return $result;
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}
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/**
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* @brief execute a prepared statement, on error write log and throw exception
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* @param mixed $stmt PDOStatementWrapper | MDB2_Statement_Common ,
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* an array with 'sql' and optionally 'limit' and 'offset' keys
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* .. or a simple sql query string
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* @param array $parameters
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* @return result
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* @throws DatabaseException
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*/
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static public function executeAudited( $stmt, array $parameters = null) {
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if (is_string($stmt)) {
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// convert to an array with 'sql'
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if (stripos($stmt,'LIMIT') !== false) { //OFFSET requires LIMIT, se we only neet to check for LIMIT
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// TODO try to convert LIMIT OFFSET notation to parameters, see fixLimitClauseForMSSQL
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$message = 'LIMIT and OFFSET are forbidden for portability reasons,'
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. ' pass an array with \'limit\' and \'offset\' instead';
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throw new DatabaseException($message);
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}
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$stmt = array('sql' => $stmt, 'limit' => null, 'offset' => null);
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}
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if (is_array($stmt)){
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// convert to prepared statement
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if ( ! array_key_exists('sql', $stmt) ) {
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$message = 'statement array must at least contain key \'sql\'';
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throw new DatabaseException($message);
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}
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if ( ! array_key_exists('limit', $stmt) ) {
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$stmt['limit'] = null;
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}
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if ( ! array_key_exists('limit', $stmt) ) {
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$stmt['offset'] = null;
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}
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$stmt = self::prepare($stmt['sql'], $stmt['limit'], $stmt['offset']);
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}
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self::raiseExceptionOnError($stmt, 'Could not prepare statement');
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if ($stmt instanceof PDOStatementWrapper || $stmt instanceof MDB2_Statement_Common) {
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$result = $stmt->execute($parameters);
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self::raiseExceptionOnError($result, 'Could not execute statement');
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} else {
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if (is_object($stmt)) {
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$message = 'Expected a prepared statement or array got ' . get_class($stmt);
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} else {
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$message = 'Expected a prepared statement or array got ' . gettype($stmt);
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}
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throw new DatabaseException($message);
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}
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return $result;
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}
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|
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/**
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* @brief gets last value of autoincrement
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* @param string $table The optional table name (will replace *PREFIX*) and add sequence suffix
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* @return int id
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* @throws DatabaseException
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*
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* MDB2 lastInsertID()
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*
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* Call this method right after the insert command or other functions may
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* cause trouble!
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*/
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public static function insertid($table=null) {
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self::connect();
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$type = OC_Config::getValue( "dbtype", "sqlite" );
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if( $type === 'pgsql' ) {
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$result = self::executeAudited('SELECT lastval() AS id');
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$row = $result->fetchRow();
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self::raiseExceptionOnError($row, 'fetching row for insertid failed');
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return $row['id'];
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} else if( $type === 'mssql' || $type === 'oci') {
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if($table !== null) {
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$prefix = OC_Config::getValue( "dbtableprefix", "oc_" );
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$table = str_replace( '*PREFIX*', $prefix, $table );
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}
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$result = self::$connection->lastInsertId($table);
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} else {
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if($table !== null) {
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$prefix = OC_Config::getValue( "dbtableprefix", "oc_" );
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$suffix = OC_Config::getValue( "dbsequencesuffix", "_id_seq" );
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$table = str_replace( '*PREFIX*', $prefix, $table ).$suffix;
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}
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$result = self::$connection->lastInsertId($table);
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}
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self::raiseExceptionOnError($result, 'insertid failed');
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return $result;
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}
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|
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/**
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* @brief Disconnect
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* @return bool
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*
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* This is good bye, good bye, yeah!
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*/
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public static function disconnect() {
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// Cut connection if required
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if(self::$connection) {
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if(self::$backend==self::BACKEND_MDB2) {
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self::$connection->disconnect();
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}
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self::$connection=false;
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self::$MDB2=false;
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self::$PDO=false;
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}
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return true;
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}
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|
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/**
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* @brief saves database scheme to xml file
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* @param string $file name of file
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* @param int $mode
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* @return bool
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*
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* TODO: write more documentation
|
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*/
|
|
public static function getDbStructure( $file, $mode=MDB2_SCHEMA_DUMP_STRUCTURE) {
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self::connectScheme();
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|
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// write the scheme
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|
$definition = self::$schema->getDefinitionFromDatabase();
|
|
$dump_options = array(
|
|
'output_mode' => 'file',
|
|
'output' => $file,
|
|
'end_of_line' => "\n"
|
|
);
|
|
self::$schema->dumpDatabase( $definition, $dump_options, $mode );
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Creates tables from XML file
|
|
* @param string $file file to read structure from
|
|
* @return bool
|
|
*
|
|
* TODO: write more documentation
|
|
*/
|
|
public static function createDbFromStructure( $file ) {
|
|
$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );
|
|
$CONFIG_DBTABLEPREFIX = OC_Config::getValue( "dbtableprefix", "oc_" );
|
|
$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
|
|
|
|
// cleanup the cached queries
|
|
self::$preparedQueries = array();
|
|
|
|
self::connectScheme();
|
|
|
|
// read file
|
|
$content = file_get_contents( $file );
|
|
|
|
// Make changes and save them to an in-memory file
|
|
$file2 = 'static://db_scheme';
|
|
$content = str_replace( '*dbname*', $CONFIG_DBNAME, $content );
|
|
$content = str_replace( '*dbprefix*', $CONFIG_DBTABLEPREFIX, $content );
|
|
/* FIXME: use CURRENT_TIMESTAMP for all databases. mysql supports it as a default for DATETIME since 5.6.5 [1]
|
|
* as a fallback we could use <default>0000-01-01 00:00:00</default> everywhere
|
|
* [1] http://bugs.mysql.com/bug.php?id=27645
|
|
* http://dev.mysql.com/doc/refman/5.0/en/timestamp-initialization.html
|
|
* http://www.postgresql.org/docs/8.1/static/functions-datetime.html
|
|
* http://www.sqlite.org/lang_createtable.html
|
|
* http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions037.htm
|
|
*/
|
|
if( $CONFIG_DBTYPE == 'pgsql' ) { //mysql support it too but sqlite doesn't
|
|
$content = str_replace( '<default>0000-00-00 00:00:00</default>',
|
|
'<default>CURRENT_TIMESTAMP</default>', $content );
|
|
}
|
|
|
|
file_put_contents( $file2, $content );
|
|
|
|
// Try to create tables
|
|
$definition = self::$schema->parseDatabaseDefinitionFile( $file2 );
|
|
|
|
//clean up memory
|
|
unlink( $file2 );
|
|
|
|
self::raiseExceptionOnError($definition,'Failed to parse the database definition');
|
|
|
|
if(OC_Config::getValue('dbtype', 'sqlite')==='oci') {
|
|
unset($definition['charset']); //or MDB2 tries SHUTDOWN IMMEDIATE
|
|
$oldname = $definition['name'];
|
|
$definition['name']=OC_Config::getValue( "dbuser", $oldname );
|
|
}
|
|
|
|
// we should never drop a database
|
|
$definition['overwrite'] = false;
|
|
|
|
$ret=self::$schema->createDatabase( $definition );
|
|
|
|
self::raiseExceptionOnError($ret,'Failed to create the database structure');
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief update the database scheme
|
|
* @param string $file file to read structure from
|
|
* @return bool
|
|
*/
|
|
public static function updateDbFromStructure($file) {
|
|
$CONFIG_DBTABLEPREFIX = OC_Config::getValue( "dbtableprefix", "oc_" );
|
|
$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
|
|
|
|
self::connectScheme();
|
|
|
|
if(OC_Config::getValue('dbtype', 'sqlite')==='oci') {
|
|
//set dbname, it is unset because oci uses 'service' to connect
|
|
self::$schema->db->database_name=self::$schema->db->dsn['username'];
|
|
}
|
|
|
|
// read file
|
|
$content = file_get_contents( $file );
|
|
|
|
$previousSchema = self::$schema->getDefinitionFromDatabase();
|
|
self::raiseExceptionOnError($previousSchema,'Failed to get existing database structure for updating');
|
|
|
|
// Make changes and save them to an in-memory file
|
|
$file2 = 'static://db_scheme';
|
|
$content = str_replace( '*dbname*', $previousSchema['name'], $content );
|
|
$content = str_replace( '*dbprefix*', $CONFIG_DBTABLEPREFIX, $content );
|
|
/* FIXME: use CURRENT_TIMESTAMP for all databases. mysql supports it as a default for DATETIME since 5.6.5 [1]
|
|
* as a fallback we could use <default>0000-01-01 00:00:00</default> everywhere
|
|
* [1] http://bugs.mysql.com/bug.php?id=27645
|
|
* http://dev.mysql.com/doc/refman/5.0/en/timestamp-initialization.html
|
|
* http://www.postgresql.org/docs/8.1/static/functions-datetime.html
|
|
* http://www.sqlite.org/lang_createtable.html
|
|
* http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions037.htm
|
|
*/
|
|
if( $CONFIG_DBTYPE == 'pgsql' ) { //mysql support it too but sqlite doesn't
|
|
$content = str_replace( '<default>0000-00-00 00:00:00</default>',
|
|
'<default>CURRENT_TIMESTAMP</default>', $content );
|
|
}
|
|
if(OC_Config::getValue('dbtype', 'sqlite')==='oci') {
|
|
unset($previousSchema['charset']); //or MDB2 tries SHUTDOWN IMMEDIATE
|
|
$oldname = $previousSchema['name'];
|
|
$previousSchema['name']=OC_Config::getValue( "dbuser", $oldname );
|
|
//TODO check identifiers are at most 30 chars long
|
|
}
|
|
file_put_contents( $file2, $content );
|
|
$op = self::$schema->updateDatabase($file2, $previousSchema, array(), false);
|
|
|
|
//clean up memory
|
|
unlink( $file2 );
|
|
|
|
self::raiseExceptionOnError($op,'Failed to update database structure');
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief connects to a MDB2 database scheme
|
|
* @returns bool
|
|
*
|
|
* Connects to a MDB2 database scheme
|
|
*/
|
|
private static function connectScheme() {
|
|
// We need a mdb2 database connection
|
|
self::connectMDB2();
|
|
self::$MDB2->loadModule('Manager');
|
|
self::$MDB2->loadModule('Reverse');
|
|
|
|
// Connect if this did not happen before
|
|
if(!self::$schema) {
|
|
require_once 'MDB2/Schema.php';
|
|
self::$schema=MDB2_Schema::factory(self::$MDB2);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Insert a row if a matching row doesn't exists.
|
|
* @param string $table. The table to insert into in the form '*PREFIX*tableName'
|
|
* @param array $input. An array of fieldname/value pairs
|
|
* @returns The return value from PDOStatementWrapper->execute()
|
|
*/
|
|
public static function insertIfNotExist($table, $input) {
|
|
self::connect();
|
|
$prefix = OC_Config::getValue( "dbtableprefix", "oc_" );
|
|
$table = str_replace( '*PREFIX*', $prefix, $table );
|
|
|
|
if(is_null(self::$type)) {
|
|
self::$type=OC_Config::getValue( "dbtype", "sqlite" );
|
|
}
|
|
$type = self::$type;
|
|
|
|
$query = '';
|
|
$inserts = array_values($input);
|
|
// differences in escaping of table names ('`' for mysql) and getting the current timestamp
|
|
if( $type == 'sqlite' || $type == 'sqlite3' ) {
|
|
// NOTE: For SQLite we have to use this clumsy approach
|
|
// otherwise all fieldnames used must have a unique key.
|
|
$query = 'SELECT * FROM `' . $table . '` WHERE ';
|
|
foreach($input as $key => $value) {
|
|
$query .= '`' . $key . '` = ? AND ';
|
|
}
|
|
$query = substr($query, 0, strlen($query) - 5);
|
|
try {
|
|
$result = self::executeAudited($query, $inserts);
|
|
} catch(DatabaseException $e) {
|
|
OC_Template::printExceptionErrorPage( $e );
|
|
}
|
|
|
|
if((int)$result->numRows() === 0) {
|
|
$query = 'INSERT INTO `' . $table . '` (`'
|
|
. implode('`,`', array_keys($input)) . '`) VALUES('
|
|
. str_repeat('?,', count($input)-1).'? ' . ')';
|
|
} else {
|
|
return true;
|
|
}
|
|
} elseif( $type == 'pgsql' || $type == 'oci' || $type == 'mysql' || $type == 'mssql') {
|
|
$query = 'INSERT INTO `' .$table . '` (`'
|
|
. implode('`,`', array_keys($input)) . '`) SELECT '
|
|
. str_repeat('?,', count($input)-1).'? ' // Is there a prettier alternative?
|
|
. 'FROM `' . $table . '` WHERE ';
|
|
|
|
foreach($input as $key => $value) {
|
|
$query .= '`' . $key . '` = ? AND ';
|
|
}
|
|
$query = substr($query, 0, strlen($query) - 5);
|
|
$query .= ' HAVING COUNT(*) = 0';
|
|
$inserts = array_merge($inserts, $inserts);
|
|
}
|
|
|
|
try {
|
|
$result = self::executeAudited($query, $inserts);
|
|
} catch(PDOException $e) {
|
|
OC_Template::printExceptionErrorPage( $e );
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @brief does minor changes to query
|
|
* @param string $query Query string
|
|
* @return string corrected query string
|
|
*
|
|
* This function replaces *PREFIX* with the value of $CONFIG_DBTABLEPREFIX
|
|
* and replaces the ` with ' or " according to the database driver.
|
|
*/
|
|
private static function processQuery( $query ) {
|
|
self::connect();
|
|
// We need Database type and table prefix
|
|
if(is_null(self::$type)) {
|
|
self::$type=OC_Config::getValue( "dbtype", "sqlite" );
|
|
}
|
|
$type = self::$type;
|
|
if(is_null(self::$prefix)) {
|
|
self::$prefix=OC_Config::getValue( "dbtableprefix", "oc_" );
|
|
}
|
|
$prefix = self::$prefix;
|
|
|
|
// differences in escaping of table names ('`' for mysql) and getting the current timestamp
|
|
if( $type == 'sqlite' || $type == 'sqlite3' ) {
|
|
$query = str_replace( '`', '"', $query );
|
|
$query = str_ireplace( 'NOW()', 'datetime(\'now\')', $query );
|
|
$query = str_ireplace( 'UNIX_TIMESTAMP()', 'strftime(\'%s\',\'now\')', $query );
|
|
}elseif( $type == 'pgsql' ) {
|
|
$query = str_replace( '`', '"', $query );
|
|
$query = str_ireplace( 'UNIX_TIMESTAMP()', 'cast(extract(epoch from current_timestamp) as integer)',
|
|
$query );
|
|
}elseif( $type == 'oci' ) {
|
|
$query = str_replace( '`', '"', $query );
|
|
$query = str_ireplace( 'NOW()', 'CURRENT_TIMESTAMP', $query );
|
|
}elseif( $type == 'mssql' ) {
|
|
$query = preg_replace( "/\`(.*?)`/", "[$1]", $query );
|
|
$query = str_replace( 'NOW()', 'CURRENT_TIMESTAMP', $query );
|
|
$query = str_replace( 'now()', 'CURRENT_TIMESTAMP', $query );
|
|
$query = str_replace( 'LENGTH(', 'LEN(', $query );
|
|
$query = str_replace( 'SUBSTR(', 'SUBSTRING(', $query );
|
|
|
|
$query = self::fixLimitClauseForMSSQL($query);
|
|
}
|
|
|
|
// replace table name prefix
|
|
$query = str_replace( '*PREFIX*', $prefix, $query );
|
|
|
|
return $query;
|
|
}
|
|
|
|
private static function fixLimitClauseForMSSQL($query) {
|
|
$limitLocation = stripos ($query, "LIMIT");
|
|
|
|
if ( $limitLocation === false ) {
|
|
return $query;
|
|
}
|
|
|
|
// total == 0 means all results - not zero results
|
|
//
|
|
// First number is either total or offset, locate it by first space
|
|
//
|
|
$offset = substr ($query, $limitLocation + 5);
|
|
$offset = substr ($offset, 0, stripos ($offset, ' '));
|
|
$offset = trim ($offset);
|
|
|
|
// check for another parameter
|
|
if (stripos ($offset, ',') === false) {
|
|
// no more parameters
|
|
$offset = 0;
|
|
$total = intval ($offset);
|
|
} else {
|
|
// found another parameter
|
|
$offset = intval ($offset);
|
|
|
|
$total = substr ($query, $limitLocation + 5);
|
|
$total = substr ($total, stripos ($total, ','));
|
|
|
|
$total = substr ($total, 0, stripos ($total, ' '));
|
|
$total = intval ($total);
|
|
}
|
|
|
|
$query = trim (substr ($query, 0, $limitLocation));
|
|
|
|
if ($offset == 0 && $total !== 0) {
|
|
if (strpos($query, "SELECT") === false) {
|
|
$query = "TOP {$total} " . $query;
|
|
} else {
|
|
$query = preg_replace('/SELECT(\s*DISTINCT)?/Dsi', 'SELECT$1 TOP '.$total, $query);
|
|
}
|
|
} else if ($offset > 0) {
|
|
$query = preg_replace('/SELECT(\s*DISTINCT)?/Dsi', 'SELECT$1 TOP(10000000) ', $query);
|
|
$query = 'SELECT *
|
|
FROM (SELECT sub2.*, ROW_NUMBER() OVER(ORDER BY sub2.line2) AS line3
|
|
FROM (SELECT 1 AS line2, sub1.* FROM (' . $query . ') AS sub1) as sub2) AS sub3';
|
|
|
|
if ($total > 0) {
|
|
$query .= ' WHERE line3 BETWEEN ' . ($offset + 1) . ' AND ' . ($offset + $total);
|
|
} else {
|
|
$query .= ' WHERE line3 > ' . $offset;
|
|
}
|
|
}
|
|
return $query;
|
|
}
|
|
|
|
/**
|
|
* @brief drop a table
|
|
* @param string $tableName the table to drop
|
|
*/
|
|
public static function dropTable($tableName) {
|
|
self::connectMDB2();
|
|
self::$MDB2->loadModule('Manager');
|
|
self::$MDB2->dropTable($tableName);
|
|
}
|
|
|
|
/**
|
|
* remove all tables defined in a database structure xml file
|
|
* @param string $file the xml file describing the tables
|
|
*/
|
|
public static function removeDBStructure($file) {
|
|
$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );
|
|
$CONFIG_DBTABLEPREFIX = OC_Config::getValue( "dbtableprefix", "oc_" );
|
|
self::connectScheme();
|
|
|
|
// read file
|
|
$content = file_get_contents( $file );
|
|
|
|
// Make changes and save them to a temporary file
|
|
$file2 = tempnam( get_temp_dir(), 'oc_db_scheme_' );
|
|
$content = str_replace( '*dbname*', $CONFIG_DBNAME, $content );
|
|
$content = str_replace( '*dbprefix*', $CONFIG_DBTABLEPREFIX, $content );
|
|
file_put_contents( $file2, $content );
|
|
|
|
// get the tables
|
|
$definition = self::$schema->parseDatabaseDefinitionFile( $file2 );
|
|
|
|
// Delete our temporary file
|
|
unlink( $file2 );
|
|
$tables=array_keys($definition['tables']);
|
|
foreach($tables as $table) {
|
|
self::dropTable($table);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief replaces the owncloud tables with a new set
|
|
* @param $file string path to the MDB2 xml db export file
|
|
*/
|
|
public static function replaceDB( $file ) {
|
|
$apps = OC_App::getAllApps();
|
|
self::beginTransaction();
|
|
// Delete the old tables
|
|
self::removeDBStructure( OC::$SERVERROOT . '/db_structure.xml' );
|
|
|
|
foreach($apps as $app) {
|
|
$path = OC_App::getAppPath($app).'/appinfo/database.xml';
|
|
if(file_exists($path)) {
|
|
self::removeDBStructure( $path );
|
|
}
|
|
}
|
|
|
|
// Create new tables
|
|
self::createDBFromStructure( $file );
|
|
self::commit();
|
|
}
|
|
|
|
/**
|
|
* Start a transaction
|
|
* @return bool
|
|
*/
|
|
public static function beginTransaction() {
|
|
self::connect();
|
|
if (self::$backend==self::BACKEND_MDB2 && !self::$connection->supports('transactions')) {
|
|
return false;
|
|
}
|
|
self::$connection->beginTransaction();
|
|
self::$inTransaction=true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Commit the database changes done during a transaction that is in progress
|
|
* @return bool
|
|
*/
|
|
public static function commit() {
|
|
self::connect();
|
|
if(!self::$inTransaction) {
|
|
return false;
|
|
}
|
|
self::$connection->commit();
|
|
self::$inTransaction=false;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* check if a result is an error, works with MDB2 and PDOException
|
|
* @param mixed $result
|
|
* @return bool
|
|
*/
|
|
public static function isError($result) {
|
|
if(!$result) {
|
|
return true;
|
|
}elseif(self::$backend==self::BACKEND_MDB2 and PEAR::isError($result)) {
|
|
return true;
|
|
}else{
|
|
return false;
|
|
}
|
|
}
|
|
/**
|
|
* check if a result is an error and throws an exception, works with MDB2 and PDOException
|
|
* @param mixed $result
|
|
* @param string message
|
|
* @return void
|
|
* @throws DatabaseException
|
|
*/
|
|
public static function raiseExceptionOnError($result, $message = null) {
|
|
if(self::isError($result)) {
|
|
if ($message === null) {
|
|
$message = self::getErrorMessage($result);
|
|
} else {
|
|
$message .= ', Root cause:' . self::getErrorMessage($result);
|
|
}
|
|
throw new DatabaseException($message, self::getErrorCode($result));
|
|
}
|
|
}
|
|
|
|
public static function getErrorCode($error) {
|
|
if ( self::$backend==self::BACKEND_MDB2 and PEAR::isError($error) ) {
|
|
$code = $error->getCode();
|
|
} elseif ( self::$backend==self::BACKEND_PDO and self::$PDO ) {
|
|
$code = self::$PDO->errorCode();
|
|
}
|
|
return $code;
|
|
}
|
|
/**
|
|
* returns the error code and message as a string for logging
|
|
* works with MDB2 and PDOException
|
|
* @param mixed $error
|
|
* @return string
|
|
*/
|
|
public static function getErrorMessage($error) {
|
|
if ( self::$backend==self::BACKEND_MDB2 and PEAR::isError($error) ) {
|
|
$msg = $error->getCode() . ': ' . $error->getMessage();
|
|
$msg .= ' (' . $error->getDebugInfo() . ')';
|
|
} elseif (self::$backend==self::BACKEND_PDO and self::$PDO) {
|
|
$msg = self::$PDO->errorCode() . ': ';
|
|
$errorInfo = self::$PDO->errorInfo();
|
|
if (is_array($errorInfo)) {
|
|
$msg .= 'SQLSTATE = '.$errorInfo[0] . ', ';
|
|
$msg .= 'Driver Code = '.$errorInfo[1] . ', ';
|
|
$msg .= 'Driver Message = '.$errorInfo[2];
|
|
}else{
|
|
$msg = '';
|
|
}
|
|
}else{
|
|
$msg = '';
|
|
}
|
|
return $msg;
|
|
}
|
|
|
|
/**
|
|
* @param bool $enabled
|
|
*/
|
|
static public function enableCaching($enabled) {
|
|
if (!$enabled) {
|
|
self::$preparedQueries = array();
|
|
}
|
|
self::$cachingEnabled = $enabled;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* small wrapper around PDOStatement to make it behave ,more like an MDB2 Statement
|
|
*/
|
|
class PDOStatementWrapper{
|
|
/**
|
|
* @var PDOStatement
|
|
*/
|
|
private $statement=null;
|
|
private $lastArguments=array();
|
|
|
|
public function __construct($statement) {
|
|
$this->statement=$statement;
|
|
}
|
|
|
|
/**
|
|
* make execute return the result instead of a bool
|
|
*/
|
|
public function execute($input=array()) {
|
|
if(OC_Config::getValue( "log_query", false)) {
|
|
$params_str = str_replace("\n"," ",var_export($input,true));
|
|
OC_Log::write('core', 'DB execute with arguments : '.$params_str, OC_Log::DEBUG);
|
|
}
|
|
$this->lastArguments = $input;
|
|
if (count($input) > 0) {
|
|
|
|
if (!isset($type)) {
|
|
$type = OC_Config::getValue( "dbtype", "sqlite" );
|
|
}
|
|
|
|
if ($type == 'mssql') {
|
|
$input = $this->tryFixSubstringLastArgumentDataForMSSQL($input);
|
|
}
|
|
|
|
$result=$this->statement->execute($input);
|
|
} else {
|
|
$result=$this->statement->execute();
|
|
}
|
|
|
|
if ($result) {
|
|
return $this;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private function tryFixSubstringLastArgumentDataForMSSQL($input) {
|
|
$query = $this->statement->queryString;
|
|
$pos = stripos ($query, 'SUBSTRING');
|
|
|
|
if ( $pos === false) {
|
|
return;
|
|
}
|
|
|
|
try {
|
|
$newQuery = '';
|
|
|
|
$cArg = 0;
|
|
|
|
$inSubstring = false;
|
|
|
|
// Create new query
|
|
for ($i = 0; $i < strlen ($query); $i++) {
|
|
if ($inSubstring == false) {
|
|
// Defines when we should start inserting values
|
|
if (substr ($query, $i, 9) == 'SUBSTRING') {
|
|
$inSubstring = true;
|
|
}
|
|
} else {
|
|
// Defines when we should stop inserting values
|
|
if (substr ($query, $i, 1) == ')') {
|
|
$inSubstring = false;
|
|
}
|
|
}
|
|
|
|
if (substr ($query, $i, 1) == '?') {
|
|
// We found a question mark
|
|
if ($inSubstring) {
|
|
$newQuery .= $input[$cArg];
|
|
|
|
//
|
|
// Remove from input array
|
|
//
|
|
array_splice ($input, $cArg, 1);
|
|
} else {
|
|
$newQuery .= substr ($query, $i, 1);
|
|
$cArg++;
|
|
}
|
|
} else {
|
|
$newQuery .= substr ($query, $i, 1);
|
|
}
|
|
}
|
|
|
|
// The global data we need
|
|
$name = OC_Config::getValue( "dbname", "owncloud" );
|
|
$host = OC_Config::getValue( "dbhost", "" );
|
|
$user = OC_Config::getValue( "dbuser", "" );
|
|
$pass = OC_Config::getValue( "dbpassword", "" );
|
|
if (strpos($host,':')) {
|
|
list($host, $port) = explode(':', $host, 2);
|
|
} else {
|
|
$port = false;
|
|
}
|
|
$opts = array();
|
|
|
|
if ($port) {
|
|
$dsn = 'sqlsrv:Server='.$host.','.$port.';Database='.$name;
|
|
} else {
|
|
$dsn = 'sqlsrv:Server='.$host.';Database='.$name;
|
|
}
|
|
|
|
$PDO = new PDO($dsn, $user, $pass, $opts);
|
|
$PDO->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
|
|
$PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
|
|
|
|
$this->statement = $PDO->prepare($newQuery);
|
|
|
|
$this->lastArguments = $input;
|
|
|
|
return $input;
|
|
} catch (PDOException $e){
|
|
$entry = 'PDO DB Error: "'.$e->getMessage().'"<br />';
|
|
$entry .= 'Offending command was: '.$this->statement->queryString .'<br />';
|
|
$entry .= 'Input parameters: ' .print_r($input, true).'<br />';
|
|
$entry .= 'Stack trace: ' .$e->getTraceAsString().'<br />';
|
|
OC_Log::write('core', $entry, OC_Log::FATAL);
|
|
OC_User::setUserId(null);
|
|
|
|
// send http status 503
|
|
header('HTTP/1.1 503 Service Temporarily Unavailable');
|
|
header('Status: 503 Service Temporarily Unavailable');
|
|
OC_Template::printErrorPage('Failed to connect to database');
|
|
die ($entry);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* provide numRows
|
|
*/
|
|
public function numRows() {
|
|
$regex = '/^SELECT\s+(?:ALL\s+|DISTINCT\s+)?(?:.*?)\s+FROM\s+(.*)$/i';
|
|
if (preg_match($regex, $this->statement->queryString, $output) > 0) {
|
|
$query = OC_DB::prepare("SELECT COUNT(*) FROM {$output[1]}");
|
|
return $query->execute($this->lastArguments)->fetchColumn();
|
|
}else{
|
|
return $this->statement->rowCount();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* provide an alias for fetch
|
|
*/
|
|
public function fetchRow() {
|
|
return $this->statement->fetch();
|
|
}
|
|
|
|
/**
|
|
* pass all other function directly to the PDOStatement
|
|
*/
|
|
public function __call($name, $arguments) {
|
|
return call_user_func_array(array($this->statement, $name), $arguments);
|
|
}
|
|
|
|
/**
|
|
* Provide a simple fetchOne.
|
|
* fetch single column from the next row
|
|
* @param int $colnum the column number to fetch
|
|
*/
|
|
public function fetchOne($colnum = 0) {
|
|
return $this->statement->fetchColumn($colnum);
|
|
}
|
|
}
|