400 lines
11 KiB
PHP
400 lines
11 KiB
PHP
<?php
|
|
/**
|
|
* ownCloud
|
|
*
|
|
* @author Frank Karlitschek
|
|
* @copyright 2010 Frank Karlitschek karlitschek@kde.org
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
|
|
* License as published by the Free Software Foundation; either
|
|
* version 3 of the License, or any later version.
|
|
*
|
|
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* This class manages the access to the database. It basically is a wrapper for
|
|
* MDB2 with some adaptions.
|
|
*/
|
|
class OC_DB {
|
|
static private $DBConnection=false;
|
|
static private $schema=false;
|
|
static private $affected=0;
|
|
static private $result=false;
|
|
|
|
/**
|
|
* @brief connects to the database
|
|
* @returns true if connection can be established or nothing (die())
|
|
*
|
|
* Connects to the database as specified in config.php
|
|
*/
|
|
static public function connect(){
|
|
// The global data we need
|
|
$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );;
|
|
$CONFIG_DBHOST = OC_Config::getValue( "dbhost", "" );;
|
|
$CONFIG_DBUSER = OC_Config::getValue( "dbuser", "" );;
|
|
$CONFIG_DBPASSWORD = OC_Config::getValue( "dbpassword", "" );;
|
|
$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );;
|
|
global $SERVERROOT;
|
|
$datadir=OC_Config::getValue( "datadirectory", "$SERVERROOT/data" );
|
|
|
|
// do nothing if the connection already has been established
|
|
if(!self::$DBConnection){
|
|
// Require MDB2.php (not required in the head of the file so we only load it when needed)
|
|
require_once('MDB2.php');
|
|
|
|
// Prepare options array
|
|
$options = array(
|
|
'portability' => MDB2_PORTABILITY_ALL,
|
|
'log_line_break' => '<br>',
|
|
'idxname_format' => '%s',
|
|
'debug' => true,
|
|
'quote_identifier' => true );
|
|
|
|
// Add the dsn according to the database type
|
|
if( $CONFIG_DBTYPE == 'sqlite' or $CONFIG_DBTYPE == 'sqlite3' ){
|
|
// sqlite
|
|
$dsn = array(
|
|
'phptype' => $CONFIG_DBTYPE,
|
|
'database' => "$datadir/$CONFIG_DBNAME.db",
|
|
'mode' => '0644' );
|
|
}
|
|
elseif( $CONFIG_DBTYPE == 'mysql' ){
|
|
// MySQL
|
|
$dsn = array(
|
|
'phptype' => 'mysql',
|
|
'username' => $CONFIG_DBUSER,
|
|
'password' => $CONFIG_DBPASSWORD,
|
|
'hostspec' => $CONFIG_DBHOST,
|
|
'database' => $CONFIG_DBNAME );
|
|
}
|
|
elseif( $CONFIG_DBTYPE == 'pgsql' ){
|
|
// PostgreSQL
|
|
$dsn = array(
|
|
'phptype' => 'pgsql',
|
|
'username' => $CONFIG_DBUSER,
|
|
'password' => $CONFIG_DBPASSWORD,
|
|
'hostspec' => $CONFIG_DBHOST,
|
|
'database' => $CONFIG_DBNAME );
|
|
}
|
|
|
|
// Try to establish connection
|
|
self::$DBConnection = MDB2::factory( $dsn, $options );
|
|
|
|
// Die if we could not connect
|
|
if( PEAR::isError( self::$DBConnection )){
|
|
echo( '<b>can not connect to database, using '.$CONFIG_DBTYPE.'. ('.self::$DBConnection->getUserInfo().')</center>');
|
|
$error = self::$DBConnection->getMessage();
|
|
error_log( $error);
|
|
error_log( self::$DBConnection->getUserInfo());
|
|
die( $error );
|
|
}
|
|
|
|
// We always, really always want associative arrays
|
|
self::$DBConnection->setFetchMode(MDB2_FETCHMODE_ASSOC);
|
|
|
|
//we need to function module for query pre-procesing
|
|
self::$DBConnection->loadModule('Function');
|
|
}
|
|
|
|
// we are done. great!
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief SQL query
|
|
* @param $query Query string
|
|
* @returns result as MDB2_Result
|
|
*
|
|
* SQL query via MDB2 query()
|
|
*/
|
|
static public function query( $query ){
|
|
// Optimize the query
|
|
$query = self::processQuery( $query );
|
|
|
|
self::connect();
|
|
//fix differences between sql versions
|
|
|
|
// return the result
|
|
$result = self::$DBConnection->exec( $query );
|
|
|
|
// Die if we have an error (error means: bad query, not 0 results!)
|
|
if( PEAR::isError($result)) {
|
|
$entry = 'DB Error: "'.$result->getMessage().'"<br />';
|
|
$entry .= 'Offending command was: '.$cmd.'<br />';
|
|
error_log( $entry );
|
|
die( $entry );
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @brief Prepare a SQL query
|
|
* @param $query Query string
|
|
* @returns prepared SQL query
|
|
*
|
|
* SQL query via MDB2 prepare(), needs to be execute()'d!
|
|
*/
|
|
static public function prepare( $query ){
|
|
// Optimize the query
|
|
$query = self::processQuery( $query );
|
|
|
|
self::connect();
|
|
// return the result
|
|
$result = self::$DBConnection->prepare( $query );
|
|
|
|
// Die if we have an error (error means: bad query, not 0 results!)
|
|
if( PEAR::isError($result)) {
|
|
$entry = 'DB Error: "'.$result->getMessage().'"<br />';
|
|
$entry .= 'Offending command was: '.$query.'<br />';
|
|
error_log( $entry );
|
|
die( $entry );
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @brief gets last value of autoincrement
|
|
* @returns id
|
|
*
|
|
* MDB2 lastInsertID()
|
|
*
|
|
* Call this method right after the insert command or other functions may
|
|
* cause trouble!
|
|
*/
|
|
public static function insertid(){
|
|
self::connect();
|
|
return self::$DBConnection->lastInsertID();
|
|
}
|
|
|
|
/**
|
|
* @brief Disconnect
|
|
* @returns true/false
|
|
*
|
|
* This is good bye, good bye, yeah!
|
|
*/
|
|
public static function disconnect(){
|
|
// Cut connection if required
|
|
if(self::$DBConnection){
|
|
self::$DBConnection->disconnect();
|
|
self::$DBConnection=false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Escapes bad characters
|
|
* @param $string string with dangerous characters
|
|
* @returns escaped string
|
|
*
|
|
* MDB2 escape()
|
|
*/
|
|
public static function escape( $string ){
|
|
self::connect();
|
|
return self::$DBConnection->escape( $string );
|
|
}
|
|
|
|
/**
|
|
* @brief saves database scheme to xml file
|
|
* @param $file name of file
|
|
* @returns true/false
|
|
*
|
|
* TODO: write more documentation
|
|
*/
|
|
public static function getDbStructure( $file ){
|
|
self::connectScheme();
|
|
|
|
// write the scheme
|
|
$definition = self::$schema->getDefinitionFromDatabase();
|
|
$dump_options = array(
|
|
'output_mode' => 'file',
|
|
'output' => $file,
|
|
'end_of_line' => "\n"
|
|
);
|
|
self::$schema->dumpDatabase( $definition, $dump_options, MDB2_SCHEMA_DUMP_STRUCTURE );
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Creates tables from XML file
|
|
* @param $file file to read structure from
|
|
* @returns true/false
|
|
*
|
|
* TODO: write more documentation
|
|
*/
|
|
public static function createDbFromStructure( $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( sys_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 );
|
|
|
|
// Try to create tables
|
|
$definition = self::$schema->parseDatabaseDefinitionFile( $file2 );
|
|
|
|
// Delete our temporary file
|
|
unlink( $file2 );
|
|
|
|
// Die in case something went wrong
|
|
if( $definition instanceof MDB2_Schema_Error ){
|
|
die( $definition->getMessage().': '.$definition->getUserInfo());
|
|
}
|
|
// if(OC_Config::getValue('dbtype','sqlite')=='sqlite'){
|
|
// $definition['overwrite']=true;//always overwrite for sqlite
|
|
// }
|
|
$ret=self::$schema->createDatabase( $definition );
|
|
|
|
// Die in case something went wrong
|
|
if( $ret instanceof MDB2_Error ){
|
|
die ($ret->getMessage() . ': ' . $ret->getUserInfo());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief connects to a MDB2 database scheme
|
|
* @returns true/false
|
|
*
|
|
* Connects to a MDB2 database scheme
|
|
*/
|
|
private static function connectScheme(){
|
|
// We need a database connection
|
|
self::connect();
|
|
|
|
// Connect if this did not happen before
|
|
if(!self::$schema){
|
|
require_once('MDB2/Schema.php');
|
|
self::$schema=MDB2_Schema::factory(self::$DBConnection);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief does minor chages to query
|
|
* @param $query Query string
|
|
* @returns corrected query string
|
|
*
|
|
* This function replaces *PREFIX* with the value of $CONFIG_DBTABLEPREFIX
|
|
* and replaces the ` woth ' or " according to the database driver.
|
|
*/
|
|
private static function processQuery( $query ){
|
|
self::connect();
|
|
// We need Database type and table prefix
|
|
$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
|
|
$CONFIG_DBTABLEPREFIX = OC_Config::getValue( "dbtableprefix", "oc_" );
|
|
|
|
// differences is getting the current timestamp
|
|
$query = str_replace( 'NOW()', self::$DBConnection->now(), $query );
|
|
$query = str_replace( 'now()', self::$DBConnection->now(), $query );
|
|
|
|
// differences in escaping of table names (` for mysql)
|
|
// Problem: what if there is a ` in the value we want to insert?
|
|
if( $CONFIG_DBTYPE == 'sqlite' ){
|
|
$query = str_replace( '`', '\'', $query );
|
|
}
|
|
elseif( $CONFIG_DBTYPE == 'pgsql' ){
|
|
$query = str_replace( '`', '"', $query );
|
|
}
|
|
|
|
// replace table name prefix
|
|
$query = str_replace( '*PREFIX*', $CONFIG_DBTABLEPREFIX, $query );
|
|
|
|
return $query;
|
|
}
|
|
|
|
/**
|
|
* @brief drop a table
|
|
* @param string $tableNamme the table to drop
|
|
*/
|
|
public static function dropTable($tableName){
|
|
self::connect();
|
|
self::$DBConnection->loadModule('Manager');
|
|
self::$DBConnection->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( sys_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( $file2 );
|
|
foreach($definition['tables'] as $name=>$table){
|
|
self::dropTable($name);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Start a transaction or set a savepoint.
|
|
* @param string $savePoint (optional) name of the savepoint to set
|
|
*/
|
|
public static function beginTransaction($savePoint=''){
|
|
self::connect();
|
|
if (!self::$DBConnection->supports('transactions')) {
|
|
return false;
|
|
}
|
|
if($savePoint && !self::$DBConnection->supports('savepoints')){
|
|
return false;
|
|
}
|
|
if($savePoint){
|
|
self::$DBConnection->beginTransaction($savePoint);
|
|
}else{
|
|
self::$DBConnection->beginTransaction();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Commit the database changes done during a transaction that is in progress or release a savepoint.
|
|
* @param string $savePoint (optional) name of the savepoint to commit
|
|
*/
|
|
public static function commit($savePoint=''){
|
|
self::connect();
|
|
if(!self::$DBConnection->inTransaction()){
|
|
return false;
|
|
}
|
|
if($savePoint){
|
|
self::$DBConnection->commit($savePoint);
|
|
}else{
|
|
self::$DBConnection->commit();
|
|
}
|
|
}
|
|
}
|