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File: includes/getid3/extension.cache.mysql.php

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  Classes of Karl Holz  >  WaldScan  >  includes/getid3/extension.cache.mysql.php  >  Download  
File: includes/getid3/extension.cache.mysql.php
Role: Auxiliary script
Content type: text/plain
Description: getID3 dependency
Class: WaldScan
Scan directories for files with certain extensions
Author: By
Last change:
Date: 2 years ago
Size: 6,219 bytes
 

Contents

Class file image Download
<?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 <ahĜartemis*dk> //
// Table name mod by Carlo Capocasa <calroĜcarlocapocasa*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);
    }
}

?>