172 lines
6.1 KiB
PHP
172 lines
6.1 KiB
PHP
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<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// //
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// extension.cache.mysql.php - part of getID3() //
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// Please see readme.txt for more information //
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// ///
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/////////////////////////////////////////////////////////////////
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// //
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// This extension written by Allan Hansen <ah<61>artemis*dk> //
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// Table name mod by Carlo Capocasa <calro<72>carlocapocasa*com> //
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// ///
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/////////////////////////////////////////////////////////////////
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/**
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* This is a caching extension for getID3(). It works the exact same
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* way as the getID3 class, but return cached information very fast
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*
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* Example: (see also demo.cache.mysql.php in /demo/)
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*
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* Normal getID3 usage (example):
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*
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* require_once 'getid3/getid3.php';
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* $getID3 = new getID3;
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* $getID3->encoding = 'UTF-8';
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* $info1 = $getID3->analyze('file1.flac');
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* $info2 = $getID3->analyze('file2.wv');
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*
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* getID3_cached usage:
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*
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* require_once 'getid3/getid3.php';
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* require_once 'getid3/getid3/extension.cache.mysql.php';
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* // 5th parameter (tablename) is optional, default is 'getid3_cache'
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* $getID3 = new getID3_cached_mysql('localhost', 'database', 'username', 'password', 'tablename');
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* $getID3->encoding = 'UTF-8';
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* $info1 = $getID3->analyze('file1.flac');
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* $info2 = $getID3->analyze('file2.wv');
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*
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*
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* Supported Cache Types (this extension)
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*
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* SQL Databases:
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*
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* cache_type cache_options
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* -------------------------------------------------------------------
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* mysql host, database, username, password
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*
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*
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* DBM-Style Databases: (use extension.cache.dbm)
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*
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* cache_type cache_options
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* -------------------------------------------------------------------
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* gdbm dbm_filename, lock_filename
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* ndbm dbm_filename, lock_filename
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* db2 dbm_filename, lock_filename
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* db3 dbm_filename, lock_filename
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* db4 dbm_filename, lock_filename (PHP5 required)
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*
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* PHP must have write access to both dbm_filename and lock_filename.
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*
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*
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* Recommended Cache Types
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*
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* Infrequent updates, many reads any DBM
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* Frequent updates mysql
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*/
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class getID3_cached_mysql extends getID3
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{
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// private vars
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private $cursor;
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private $connection;
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// public: constructor - see top of this file for cache type and cache_options
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public function getID3_cached_mysql($host, $database, $username, $password, $table='getid3_cache') {
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// Check for mysql support
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if (!function_exists('mysql_pconnect')) {
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throw new Exception('PHP not compiled with mysql support.');
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}
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// Connect to database
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$this->connection = mysql_pconnect($host, $username, $password);
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if (!$this->connection) {
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throw new Exception('mysql_pconnect() failed - check permissions and spelling.');
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}
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// Select database
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if (!mysql_select_db($database, $this->connection)) {
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throw new Exception('Cannot use database '.$database);
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}
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// Set table
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$this->table = $table;
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// Create cache table if not exists
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$this->create_table();
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// Check version number and clear cache if changed
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$version = '';
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if ($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')", $this->connection)) {
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list($version) = mysql_fetch_array($this->cursor);
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}
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if ($version != getID3::VERSION) {
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$this->clear_cache();
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}
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parent::getID3();
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}
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// public: clear cache
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public function clear_cache() {
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$this->cursor = mysql_query("DELETE FROM `".mysql_real_escape_string($this->table)."`", $this->connection);
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$this->cursor = mysql_query("INSERT INTO `".mysql_real_escape_string($this->table)."` VALUES ('".getID3::VERSION."', -1, -1, -1, '".getID3::VERSION."')", $this->connection);
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}
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// public: analyze file
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public function analyze($filename) {
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if (file_exists($filename)) {
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// Short-hands
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$filetime = filemtime($filename);
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$filesize = filesize($filename);
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// Lookup file
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$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)."')", $this->connection);
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if (mysql_num_rows($this->cursor) > 0) {
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// Hit
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list($result) = mysql_fetch_array($this->cursor);
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return unserialize(base64_decode($result));
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}
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}
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// Miss
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$analysis = parent::analyze($filename);
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// Save result
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if (file_exists($filename)) {
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$this->cursor = mysql_query("INSERT INTO `".mysql_real_escape_string($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);
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}
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return $analysis;
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}
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// private: (re)create sql table
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private function create_table($drop=false) {
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$this->cursor = mysql_query("CREATE TABLE IF NOT EXISTS `".mysql_real_escape_string($this->table)."` (
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`filename` VARCHAR(255) NOT NULL DEFAULT '',
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`filesize` INT(11) NOT NULL DEFAULT '0',
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`filetime` INT(11) NOT NULL DEFAULT '0',
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`analyzetime` INT(11) NOT NULL DEFAULT '0',
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`value` TEXT NOT NULL,
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PRIMARY KEY (`filename`,`filesize`,`filetime`)) ENGINE=MyISAM", $this->connection);
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echo mysql_error($this->connection);
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}
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}
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