File indexing completed on 2024-12-22 05:33:09

 <?php
 /////////////////////////////////////////////////////////////////
 /// getID3() by James Heinrich <info@getid3.org>               //
 //  available at http://getid3.sourceforge.net                 //
 //            or http://www.getid3.org                         //
 //          also https://github.com/JamesHeinrich/getID3       //
 /////////////////////////////////////////////////////////////////
 //                                                             //
 // 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
   private $cursor;
   private $connection;
 
 
   // public: constructor - see top of this file for cache type and cache_options
   public 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 = '';
     $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();
   }
 
 
 
   // public: 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);
   }
 
 
 
   // public: analyze file
   public function analyze($filename) {
 
     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);
 
     // 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;
   }
 
 
 
   // private: (re)create sql table
   private function create_table($drop=false) {
 
     $SQLquery  = 'CREATE TABLE IF NOT EXISTS `'.mysql_real_escape_string($this->table).'` (';
     $SQLquery .=   '`filename` VARCHAR(255) 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` TEXT NOT NULL';
     $SQLquery .= ', PRIMARY KEY (`filename`, `filesize`, `filetime`)) ENGINE=MyISAM';
     $this->cursor = mysql_query($SQLquery, $this->connection);
     echo mysql_error($this->connection);
   }
 }