<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
/////////////////////////////////////////////////////////////////
// //
// 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
{
// private vars
var $cursor;
var $connection;
// public: constructor - see top of this file for cache type and cache_options
function getID3_cached_mysql($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
$version = '';
if ($this->cursor = mysql_query("SELECT `value` FROM `".mysql_real_escape_string($this->table)."` WHERE (`filename` = '".mysql_real_escape_string(getID3::VERSION)."') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')", $this->connection)) {
list($version) = mysql_fetch_array($this->cursor);
}
if ($version != getID3::VERSION) {
$this->clear_cache();
}
parent::getID3();
}
// public: clear cache
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."')", $this->connection);
}
// public: analyze file
function analyze($filename) {
if (file_exists($filename)) {
// Short-hands
$filetime = filemtime($filename);
$filesize = filesize($filename);
// Lookup file
$this->cursor = mysql_query("SELECT `value` FROM `".mysql_real_escape_string($this->table)."` WHERE (`filename` = '".mysql_real_escape_string($filename)."') AND (`filesize` = '".mysql_real_escape_string($filesize)."') AND (`filetime` = '".mysql_real_escape_string($filetime)."')", $this->connection);
if (mysql_num_rows($this->cursor) > 0) {
// Hit
list($result) = mysql_fetch_array($this->cursor);
return unserialize(base64_decode($result));
}
}
// Miss
$analysis = parent::analyze($filename);
// Save result
if (file_exists($filename)) {
$this->cursor = mysql_query("INSERT INTO `".mysql_real_escape_string($this->table)."` (`filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES ('".mysql_real_escape_string($filename)."', '".mysql_real_escape_string($filesize)."', '".mysql_real_escape_string($filetime)."', '".mysql_real_escape_string(time())."', '".mysql_real_escape_string(base64_encode(serialize($analysis)))."')", $this->connection);
}
return $analysis;
}
// private: (re)create sql table
function create_table($drop=false) {
$this->cursor = mysql_query("CREATE TABLE IF NOT EXISTS `".mysql_real_escape_string($this->table)."` (
`filename` VARCHAR(255) NOT NULL DEFAULT '',
`filesize` INT(11) NOT NULL DEFAULT '0',
`filetime` INT(11) NOT NULL DEFAULT '0',
`analyzetime` INT(11) NOT NULL DEFAULT '0',
`value` TEXT NOT NULL,
PRIMARY KEY (`filename`,`filesize`,`filetime`)) TYPE=MyISAM", $this->connection);
echo mysql_error($this->connection);
}
}
?>
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