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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.mysqli.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.mysqli.php';
* // 5th parameter (tablename) is optional, default is 'getid3_cache'
* $getID3 = new getID3_cached_mysqli('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
* -------------------------------------------------------------------
* mysqli 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 mysqli
*/
class getID3_cached_mysqli extends getID3
{
/**
* @var mysqli
*/
private $mysqli;
/**
* @var mysqli_result
*/
private $cursor;
/**
* @var string
*/
private $table;
/**
* @var bool
*/
private $db_structure_check;
/**
* 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 mysqli support
if (!function_exists('mysqli_connect')) {
throw new Exception('PHP not compiled with mysqli support.');
}
// Connect to database
$this->mysqli = new mysqli($host, $username, $password);
if ($this->mysqli->connect_error) {
throw new Exception('Connect Error (' . $this->mysqli->connect_errno . ') ' . $this->mysqli->connect_error);
}
// Select database
if (!$this->mysqli->select_db($database)) {
throw new Exception('Cannot use database '.$database);
}
// Set table
$this->table = $table;
// Create cache table if not exists
$this->create_table();
$this->db_structure_check = true; // set to false if you know your table structure has already been migrated to use `hash` as the primary key to avoid
$this->migrate_db_structure();
// Check version number and clear cache if changed
$version = '';
$SQLquery = 'SELECT `value`';
$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
$SQLquery .= ' WHERE (`filename` = \''.$this->mysqli->real_escape_string(getID3::VERSION).'\')';
$SQLquery .= ' AND (`hash` = \'getID3::VERSION\')';
if ($this->cursor = $this->mysqli->query($SQLquery)) {
list($version) = $this->cursor->fetch_array();
}
if ($version != getID3::VERSION) {
$this->clear_cache();
}
parent::__construct();
}
/**
* clear cache
*/
public function clear_cache() {
$this->mysqli->query('TRUNCATE TABLE `'.$this->mysqli->real_escape_string($this->table).'`');
$this->mysqli->query('INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (\'getID3::VERSION\', \''.getID3::VERSION.'\', -1, -1, -1, \''.getID3::VERSION.'\')');
}
/**
* migrate database structure if needed
*/
public function migrate_db_structure() {
// Check for table structure
if ($this->db_structure_check) {
$SQLquery = 'SHOW COLUMNS';
$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
$SQLquery .= ' LIKE \'hash\'';
$this->cursor = $this->mysqli->query($SQLquery);
if ($this->cursor->num_rows == 0) {
// table has not been migrated, add column, add hashes, change index
$SQLquery = 'ALTER TABLE `getid3_cache` DROP PRIMARY KEY, ADD `hash` CHAR(32) NOT NULL DEFAULT \'\' FIRST, ADD PRIMARY KEY(`hash`)';
$this->mysqli->query($SQLquery);
$SQLquery = 'UPDATE `getid3_cache` SET';
$SQLquery .= ' `hash` = MD5(`filename`, `filesize`, `filetime`)';
$SQLquery .= ' WHERE (`filesize` > -1)';
$this->mysqli->query($SQLquery);
$SQLquery = 'UPDATE `getid3_cache` SET';
$SQLquery .= ' `hash` = \'getID3::VERSION\'';
$SQLquery .= ' WHERE (`filesize` = -1)';
$SQLquery .= ' AND (`filetime` = -1)';
$SQLquery .= ' AND (`filetime` = -1)';
$this->mysqli->query($SQLquery);
}
}
}
/**
* 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`';
$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
$SQLquery .= ' WHERE (`hash` = \''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\')';
$this->cursor = $this->mysqli->query($SQLquery);
if ($this->cursor->num_rows > 0) {
// Hit
list($result) = $this->cursor->fetch_array();
return unserialize(base64_decode($result));
}
}
// Miss
$analysis = parent::analyze($filename, $filesize, $original_filename, $fp);
// Save result
if (file_exists($filename)) {
$SQLquery = 'INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (';
$SQLquery .= '\''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\'';
$SQLquery .= ', \''.$this->mysqli->real_escape_string($filename).'\'';
$SQLquery .= ', \''.$this->mysqli->real_escape_string($filesize).'\'';
$SQLquery .= ', \''.$this->mysqli->real_escape_string($filetime).'\'';
$SQLquery .= ', UNIX_TIMESTAMP()';
$SQLquery .= ', \''.$this->mysqli->real_escape_string(base64_encode(serialize($analysis))).'\'';
$SQLquery .= ')';
$this->cursor = $this->mysqli->query($SQLquery);
}
return $analysis;
}
/**
* (re)create mysqli table
*
* @param bool $drop
*/
private function create_table($drop=false) {
if ($drop) {
$SQLquery = 'DROP TABLE IF EXISTS `'.$this->mysqli->real_escape_string($this->table).'`';
$this->mysqli->query($SQLquery);
}
$SQLquery = 'CREATE TABLE IF NOT EXISTS `'.$this->mysqli->real_escape_string($this->table).'` (';
$SQLquery .= '`hash` CHAR(32) NOT NULL DEFAULT \'\'';
$SQLquery .= ', `filename` VARCHAR(1000) 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 (`hash`))';
$this->cursor = $this->mysqli->query($SQLquery);
echo $this->mysqli->error;
}
}
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