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<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at https://github.com/JamesHeinrich/getID3 //
// or https://www.getid3.org //
// or http://getid3.sourceforge.net //
// //
// extension.cache.mysql.php - part of getID3() //
// Please see readme.txt for more information //
// ///
/////////////////////////////////////////////////////////////////
// //
// This extension written by Allan Hansen <ahØartemis*dk> //
// Table name mod by Carlo Capocasa <calroØcarlocapocasa*com> //
// ///
/////////////////////////////////////////////////////////////////
/**
* This is a caching extension for getID3(). It works the exact same
* way as the getID3 class, but return cached information very fast
*
* Example: (see also demo.cache.mysql.php in /demo/)
*
* Normal getID3 usage (example):
*
* require_once 'getid3/getid3.php';
* $getID3 = new getID3;
* $getID3->encoding = 'UTF-8';
* $info1 = $getID3->analyze('file1.flac');
* $info2 = $getID3->analyze('file2.wv');
*
* getID3_cached usage:
*
* require_once 'getid3/getid3.php';
* require_once 'getid3/getid3/extension.cache.mysql.php';
* // 5th parameter (tablename) is optional, default is 'getid3_cache'
* $getID3 = new getID3_cached_mysql('localhost', 'database', 'username', 'password', 'tablename');
* $getID3->encoding = 'UTF-8';
* $info1 = $getID3->analyze('file1.flac');
* $info2 = $getID3->analyze('file2.wv');
*
*
* Supported Cache Types (this extension)
*
* SQL Databases:
*
* cache_type cache_options
* -------------------------------------------------------------------
* mysql host, database, username, password
*
*
* DBM-Style Databases: (use extension.cache.dbm)
*
* cache_type cache_options
* -------------------------------------------------------------------
* gdbm dbm_filename, lock_filename
* ndbm dbm_filename, lock_filename
* db2 dbm_filename, lock_filename
* db3 dbm_filename, lock_filename
* db4 dbm_filename, lock_filename (PHP5 required)
*
* PHP must have write access to both dbm_filename and lock_filename.
*
*
* Recommended Cache Types
*
* Infrequent updates, many reads any DBM
* Frequent updates mysql
*/
class getID3_cached_mysql extends getID3
{
/**
* @var resource
*/
private $cursor;
/**
* @var resource
*/
private $connection;
/**
* @var string
*/
private $table;
/**
* constructor - see top of this file for cache type and cache_options
*
* @param string $host
* @param string $database
* @param string $username
* @param string $password
* @param string $table
*
* @throws Exception
* @throws getid3_exception
*/
public function __construct($host, $database, $username, $password, $table='getid3_cache') {
// Check for mysql support
if (!function_exists('mysql_pconnect')) {
throw new Exception('PHP not compiled with mysql support.');
}
// Connect to database
$this->connection = mysql_pconnect($host, $username, $password);
if (!$this->connection) {
throw new Exception('mysql_pconnect() failed - check permissions and spelling.');
}
// Select database
if (!mysql_select_db($database, $this->connection)) {
throw new Exception('Cannot use database '.$database);
}
// Set table
$this->table = $table;
// Create cache table if not exists
$this->create_table();
// Check version number and clear cache if changed
$version = '';
$SQLquery = 'SELECT `value`';
$SQLquery .= ' FROM `'.mysql_real_escape_string($this->table).'`';
$SQLquery .= ' WHERE (`filename` = \''.mysql_real_escape_string(getID3::VERSION).'\')';
$SQLquery .= ' AND (`filesize` = -1)';
$SQLquery .= ' AND (`filetime` = -1)';
$SQLquery .= ' AND (`analyzetime` = -1)';
if ($this->cursor = mysql_query($SQLquery, $this->connection)) {
list($version) = mysql_fetch_array($this->cursor);
}
if ($version != getID3::VERSION) {
$this->clear_cache();
}
parent::__construct();
}
/**
* clear cache
*/
public function clear_cache() {
$this->cursor = mysql_query('DELETE FROM `'.mysql_real_escape_string($this->table).'`', $this->connection);
$this->cursor = mysql_query('INSERT INTO `'.mysql_real_escape_string($this->table).'` VALUES (\''.getID3::VERSION.'\', -1, -1, -1, \''.getID3::VERSION.'\')', $this->connection);
}
/**
* analyze file
*
* @param string $filename
* @param int $filesize
* @param string $original_filename
* @param resource $fp
*
* @return mixed
*/
public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {
$filetime = 0;
if (file_exists($filename)) {
// Short-hands
$filetime = filemtime($filename);
$filesize = filesize($filename);
// Lookup file
$SQLquery = 'SELECT `value`';
$SQLquery .= ' FROM `'.mysql_real_escape_string($this->table).'`';
$SQLquery .= ' WHERE (`filename` = \''.mysql_real_escape_string($filename).'\')';
$SQLquery .= ' AND (`filesize` = \''.mysql_real_escape_string($filesize).'\')';
$SQLquery .= ' AND (`filetime` = \''.mysql_real_escape_string($filetime).'\')';
$this->cursor = mysql_query($SQLquery, $this->connection);
if (mysql_num_rows($this->cursor) > 0) {
// Hit
list($result) = mysql_fetch_array($this->cursor);
return unserialize(base64_decode($result));
}
}
// Miss
$analysis = parent::analyze($filename, $filesize, $original_filename, $fp);
// Save result
if (file_exists($filename)) {
$SQLquery = 'INSERT INTO `'.mysql_real_escape_string($this->table).'` (`filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (';
$SQLquery .= '\''.mysql_real_escape_string($filename).'\'';
$SQLquery .= ', \''.mysql_real_escape_string($filesize).'\'';
$SQLquery .= ', \''.mysql_real_escape_string($filetime).'\'';
$SQLquery .= ', \''.mysql_real_escape_string(time() ).'\'';
$SQLquery .= ', \''.mysql_real_escape_string(base64_encode(serialize($analysis))).'\')';
$this->cursor = mysql_query($SQLquery, $this->connection);
}
return $analysis;
}
/**
* (re)create sql table
*
* @param bool $drop
*/
private function create_table($drop=false) {
$SQLquery = 'CREATE TABLE IF NOT EXISTS `'.mysql_real_escape_string($this->table).'` (';
$SQLquery .= '`filename` VARCHAR(990) NOT NULL DEFAULT \'\'';
$SQLquery .= ', `filesize` INT(11) NOT NULL DEFAULT \'0\'';
$SQLquery .= ', `filetime` INT(11) NOT NULL DEFAULT \'0\'';
$SQLquery .= ', `analyzetime` INT(11) NOT NULL DEFAULT \'0\'';
$SQLquery .= ', `value` LONGTEXT NOT NULL';
$SQLquery .= ', PRIMARY KEY (`filename`, `filesize`, `filetime`))';
$this->cursor = mysql_query($SQLquery, $this->connection);
echo mysql_error($this->connection);
}
}