264 lines
8.6 KiB
PHP
264 lines
8.6 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 https://github.com/JamesHeinrich/getID3 //
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// or https://www.getid3.org //
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// or http://getid3.sourceforge.net //
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// //
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// extension.cache.mysqli.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 <ahØartemis*dk> //
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// Table name mod by Carlo Capocasa <calroØcarlocapocasa*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.mysqli.php';
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* // 5th parameter (tablename) is optional, default is 'getid3_cache'
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* $getID3 = new getID3_cached_mysqli('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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* mysqli 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 mysqli
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*/
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class getID3_cached_mysqli extends getID3
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{
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/**
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* @var mysqli
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*/
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private $mysqli;
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/**
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* @var mysqli_result
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*/
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private $cursor;
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/**
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* @var string
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*/
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private $table;
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/**
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* @var bool
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*/
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private $db_structure_check;
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/**
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* constructor - see top of this file for cache type and cache_options
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*
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* @param string $host
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* @param string $database
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* @param string $username
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* @param string $password
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* @param string $table
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*
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* @throws Exception
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* @throws getid3_exception
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*/
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public function __construct($host, $database, $username, $password, $table='getid3_cache') {
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// Check for mysqli support
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if (!function_exists('mysqli_connect')) {
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throw new Exception('PHP not compiled with mysqli support.');
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}
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// Connect to database
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$this->mysqli = new mysqli($host, $username, $password);
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if ($this->mysqli->connect_error) {
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throw new Exception('Connect Error (' . $this->mysqli->connect_errno . ') ' . $this->mysqli->connect_error);
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}
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// Select database
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if (!$this->mysqli->select_db($database)) {
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throw new Exception('Cannot use database '.$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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$this->db_structure_check = true; // set to false if you know your table structure has already been migrated to use `hash` as the primary key to avoid
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$this->migrate_db_structure();
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// Check version number and clear cache if changed
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$version = '';
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$SQLquery = 'SELECT `value`';
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$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
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$SQLquery .= ' WHERE (`filename` = \''.$this->mysqli->real_escape_string(getID3::VERSION).'\')';
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$SQLquery .= ' AND (`hash` = \'getID3::VERSION\')';
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if ($this->cursor = $this->mysqli->query($SQLquery)) {
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list($version) = $this->cursor->fetch_array();
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}
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if ($version != getID3::VERSION) {
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$this->clear_cache();
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}
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parent::__construct();
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}
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/**
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* clear cache
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*/
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public function clear_cache() {
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$this->mysqli->query('TRUNCATE TABLE `'.$this->mysqli->real_escape_string($this->table).'`');
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$this->mysqli->query('INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (\'getID3::VERSION\', \''.getID3::VERSION.'\', -1, -1, -1, \''.getID3::VERSION.'\')');
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}
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/**
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* migrate database structure if needed
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*/
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public function migrate_db_structure() {
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// Check for table structure
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if ($this->db_structure_check) {
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$SQLquery = 'SHOW COLUMNS';
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$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
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$SQLquery .= ' LIKE \'hash\'';
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$this->cursor = $this->mysqli->query($SQLquery);
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if ($this->cursor->num_rows == 0) {
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// table has not been migrated, add column, add hashes, change index
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$SQLquery = 'ALTER TABLE `getid3_cache` DROP PRIMARY KEY, ADD `hash` CHAR(32) NOT NULL DEFAULT \'\' FIRST, ADD PRIMARY KEY(`hash`)';
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$this->mysqli->query($SQLquery);
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$SQLquery = 'UPDATE `getid3_cache` SET';
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$SQLquery .= ' `hash` = MD5(`filename`, `filesize`, `filetime`)';
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$SQLquery .= ' WHERE (`filesize` > -1)';
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$this->mysqli->query($SQLquery);
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$SQLquery = 'UPDATE `getid3_cache` SET';
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$SQLquery .= ' `hash` = \'getID3::VERSION\'';
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$SQLquery .= ' WHERE (`filesize` = -1)';
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$SQLquery .= ' AND (`filetime` = -1)';
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$SQLquery .= ' AND (`filetime` = -1)';
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$this->mysqli->query($SQLquery);
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}
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}
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}
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/**
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* analyze file
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*
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* @param string $filename
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* @param int $filesize
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* @param string $original_filename
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* @param resource $fp
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*
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* @return mixed
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*/
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public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {
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$filetime = 0;
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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($filename);
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// Lookup file
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$SQLquery = 'SELECT `value`';
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$SQLquery .= ' FROM `'.$this->mysqli->real_escape_string($this->table).'`';
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$SQLquery .= ' WHERE (`hash` = \''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\')';
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$this->cursor = $this->mysqli->query($SQLquery);
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if ($this->cursor->num_rows > 0) {
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// Hit
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list($result) = $this->cursor->fetch_array();
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return unserialize(base64_decode($result));
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}
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}
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// Miss
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$analysis = parent::analyze($filename, $filesize, $original_filename, $fp);
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// Save result
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if (file_exists($filename)) {
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$SQLquery = 'INSERT INTO `'.$this->mysqli->real_escape_string($this->table).'` (`hash`, `filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES (';
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$SQLquery .= '\''.$this->mysqli->real_escape_string(md5($filename.$filesize.$filetime)).'\'';
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$SQLquery .= ', \''.$this->mysqli->real_escape_string($filename).'\'';
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$SQLquery .= ', \''.$this->mysqli->real_escape_string($filesize).'\'';
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$SQLquery .= ', \''.$this->mysqli->real_escape_string($filetime).'\'';
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$SQLquery .= ', UNIX_TIMESTAMP()';
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$SQLquery .= ', \''.$this->mysqli->real_escape_string(base64_encode(serialize($analysis))).'\'';
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$SQLquery .= ')';
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$this->cursor = $this->mysqli->query($SQLquery);
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}
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return $analysis;
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}
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/**
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* (re)create mysqli table
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*
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* @param bool $drop
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*/
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private function create_table($drop=false) {
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if ($drop) {
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$SQLquery = 'DROP TABLE IF EXISTS `'.$this->mysqli->real_escape_string($this->table).'`';
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$this->mysqli->query($SQLquery);
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}
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$SQLquery = 'CREATE TABLE IF NOT EXISTS `'.$this->mysqli->real_escape_string($this->table).'` (';
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$SQLquery .= '`hash` CHAR(32) NOT NULL DEFAULT \'\'';
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$SQLquery .= ', `filename` VARCHAR(1000) NOT NULL DEFAULT \'\'';
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$SQLquery .= ', `filesize` INT(11) NOT NULL DEFAULT \'0\'';
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$SQLquery .= ', `filetime` INT(11) NOT NULL DEFAULT \'0\'';
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$SQLquery .= ', `analyzetime` INT(11) NOT NULL DEFAULT \'0\'';
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$SQLquery .= ', `value` LONGTEXT NOT NULL';
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$SQLquery .= ', PRIMARY KEY (`hash`))';
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$this->cursor = $this->mysqli->query($SQLquery);
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echo $this->mysqli->error;
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}
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}
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