[3318] | 1 | <?php |
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| 2 | // +----------------------------------------------------------------------+ |
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| 3 | // | PHP version 5 | |
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| 4 | // +----------------------------------------------------------------------+ |
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| 5 | // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | |
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| 6 | // +----------------------------------------------------------------------+ |
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| 7 | // | This source file is subject to version 2 of the GPL license, | |
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| 8 | // | that is bundled with this package in the file license.txt and is | |
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| 9 | // | available through the world-wide-web at the following url: | |
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| 10 | // | http://www.gnu.org/copyleft/gpl.html | |
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| 11 | // +----------------------------------------------------------------------+ |
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| 12 | // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | |
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| 13 | // +----------------------------------------------------------------------+ |
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| 14 | // | Authors: James Heinrich <infoØgetid3*org> | |
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| 15 | // | Allan Hansen <ahØartemis*dk> | |
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| 16 | // +----------------------------------------------------------------------+ |
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| 17 | // | extension.cache.mysql.php | |
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| 18 | // | MySQL Cache Extension. | |
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| 19 | // | dependencies: getid3. | |
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| 20 | // +----------------------------------------------------------------------+ |
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| 21 | // |
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| 22 | // $Id: extension.cache.mysql.php 3318 2009-05-20 21:54:10Z vdigital $ |
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| 23 | |
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| 24 | |
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| 25 | /** |
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| 26 | * This is a caching extension for getID3(). It works the exact same |
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| 27 | * way as the getID3 class, but return cached information very fast |
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| 28 | * |
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| 29 | * Example: (see also demo.cache.mysql.php in /demo/) |
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| 30 | * |
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| 31 | * Normal getID3 usage (example): |
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| 32 | * |
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| 33 | * require_once 'getid3/getid3.php'; |
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| 34 | * $getid3 = new getid3; |
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| 35 | * $getid3->encoding = 'UTF-8'; |
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| 36 | * try { |
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| 37 | * $info1 = $getid3->Analyse('file1.flac'); |
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| 38 | * $info2 = $getid3->Analyse('file2.wv'); |
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| 39 | * .... |
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| 40 | * |
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| 41 | * getID3_cached usage: |
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| 42 | * |
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| 43 | * require_once 'getid3/getid3.php'; |
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| 44 | * require_once 'getid3/getid3/extension.cache.mysql.php'; |
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| 45 | * $getid3 = new getid3_cached_mysql('localhost', 'database', 'username', 'password'); |
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| 46 | * $getid3->encoding = 'UTF-8'; |
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| 47 | * try { |
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| 48 | * $info1 = $getid3->analyse('file1.flac'); |
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| 49 | * $info2 = $getid3->analyse('file2.wv'); |
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| 50 | * ... |
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| 51 | * |
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| 52 | * |
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| 53 | * Supported Cache Types (this extension) |
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| 54 | * |
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| 55 | * SQL Databases: |
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| 56 | * |
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| 57 | * cache_type cache_options |
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| 58 | * ------------------------------------------------------------------- |
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| 59 | * mysql host, database, username, password |
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| 60 | * |
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| 61 | * |
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| 62 | * DBM-Style Databases: (use extension.cache.dbm) |
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| 63 | * |
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| 64 | * cache_type cache_options |
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| 65 | * ------------------------------------------------------------------- |
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| 66 | * gdbm dbm_filename, lock_filename |
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| 67 | * ndbm dbm_filename, lock_filename |
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| 68 | * db2 dbm_filename, lock_filename |
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| 69 | * db3 dbm_filename, lock_filename |
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| 70 | * db4 dbm_filename, lock_filename (PHP5 required) |
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| 71 | * |
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| 72 | * PHP must have write access to both dbm_filename and lock_filename. |
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| 73 | * |
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| 74 | * |
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| 75 | * Recommended Cache Types |
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| 76 | * |
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| 77 | * Infrequent updates, many reads any DBM |
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| 78 | * Frequent updates mysql |
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| 79 | */ |
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| 80 | |
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| 81 | |
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| 82 | class getid3_cached_mysql extends getID3 |
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| 83 | { |
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| 84 | |
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| 85 | private $cursor; |
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| 86 | private $connection; |
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| 87 | |
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| 88 | |
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| 89 | public function __construct($host, $database, $username, $password) { |
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| 90 | |
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| 91 | // Check for mysql support |
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| 92 | if (!function_exists('mysql_pconnect')) { |
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| 93 | throw new getid3_exception('PHP not compiled with mysql support.'); |
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| 94 | } |
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| 95 | |
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| 96 | // Connect to database |
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| 97 | $this->connection = @mysql_pconnect($host, $username, $password); |
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| 98 | if (!$this->connection) { |
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| 99 | throw new getid3_exception('mysql_pconnect() failed - check permissions and spelling.'); |
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| 100 | } |
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| 101 | |
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| 102 | // Select database |
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| 103 | if (!@mysql_select_db($database, $this->connection)) { |
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| 104 | throw new getid3_exception('Cannot use database '.$database); |
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| 105 | } |
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| 106 | |
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| 107 | // Create cache table if not exists |
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| 108 | $this->create_table(); |
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| 109 | |
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| 110 | // Check version number and clear cache if changed |
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| 111 | $this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename` = '".getid3::VERSION."') AND (`filesize` = '-1') AND (`filetime` = '-1') AND (`analyzetime` = '-1')", $this->connection); |
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| 112 | list($version) = @mysql_fetch_array($this->cursor); |
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| 113 | if ($version != getid3::VERSION) { |
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| 114 | $this->clear_cache(); |
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| 115 | } |
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| 116 | |
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| 117 | parent::__construct(); |
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| 118 | } |
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| 119 | |
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| 120 | |
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| 121 | |
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| 122 | public function clear_cache() { |
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| 123 | |
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| 124 | $this->cursor = mysql_query("DELETE FROM `getid3_cache`", $this->connection); |
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| 125 | $this->cursor = mysql_query("INSERT INTO `getid3_cache` VALUES ('".getid3::VERSION."', -1, -1, -1, '".getid3::VERSION."')", $this->connection); |
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| 126 | } |
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| 127 | |
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| 128 | |
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| 129 | |
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| 130 | public function Analyze($filename) { |
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| 131 | |
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| 132 | if (file_exists($filename)) { |
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| 133 | |
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| 134 | // Short-hands |
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| 135 | $filetime = filemtime($filename); |
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| 136 | $filesize = filesize($filename); |
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| 137 | $filenam2 = mysql_escape_string($filename); |
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| 138 | |
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| 139 | // Loopup file |
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| 140 | $this->cursor = mysql_query("SELECT `value` FROM `getid3_cache` WHERE (`filename`='".$filenam2."') AND (`filesize`='".$filesize."') AND (`filetime`='".$filetime."')", $this->connection); |
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| 141 | list($result) = @mysql_fetch_array($this->cursor); |
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| 142 | |
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| 143 | // Hit |
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| 144 | if ($result) { |
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| 145 | return unserialize($result); |
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| 146 | } |
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| 147 | } |
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| 148 | |
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| 149 | // Miss |
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| 150 | $result = parent::Analyze($filename); |
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| 151 | |
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| 152 | // Save result |
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| 153 | if (file_exists($filename)) { |
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| 154 | $res2 = mysql_escape_string(serialize($result)); |
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| 155 | $this->cursor = mysql_query("INSERT INTO `getid3_cache` (`filename`, `filesize`, `filetime`, `analyzetime`, `value`) VALUES ('".$filenam2."', '".$filesize."', '".$filetime."', '".time()."', '".$res2."')", $this->connection); |
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| 156 | } |
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| 157 | return $result; |
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| 158 | } |
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| 159 | |
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| 160 | |
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| 161 | |
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| 162 | // (re)create sql table |
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| 163 | private function create_table($drop = false) { |
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| 164 | |
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| 165 | $this->cursor = mysql_query("CREATE TABLE IF NOT EXISTS `getid3_cache` ( |
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| 166 | `filename` VARCHAR(255) NOT NULL DEFAULT '', |
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| 167 | `filesize` INT(11) NOT NULL DEFAULT '0', |
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| 168 | `filetime` INT(11) NOT NULL DEFAULT '0', |
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| 169 | `analyzetime` INT(11) NOT NULL DEFAULT '0', |
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| 170 | `value` TEXT NOT NULL, |
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| 171 | PRIMARY KEY (`filename`,`filesize`,`filetime`)) TYPE=MyISAM", $this->connection); |
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| 172 | echo mysql_error($this->connection); |
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| 173 | } |
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| 174 | } |
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| 175 | |
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| 176 | |
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| 177 | ?> |
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