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Diffstat (limited to 'getid3/extension.cache.dbm.php')
| -rw-r--r-- | getid3/extension.cache.dbm.php | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/getid3/extension.cache.dbm.php b/getid3/extension.cache.dbm.php deleted file mode 100644 index 051bb1f..0000000 --- a/getid3/extension.cache.dbm.php +++ /dev/null @@ -1,222 +0,0 @@ -<?php -///////////////////////////////////////////////////////////////// -/// getID3() by James Heinrich <info@getid3.org> // -// available at http://getid3.sourceforge.net // -// or http://www.getid3.org // -///////////////////////////////////////////////////////////////// -// // -// extension.cache.dbm.php - part of getID3() // -// Please see readme.txt for more information // -// /// -///////////////////////////////////////////////////////////////// -// // -// This extension written by Allan Hansen <ahØartemis*dk> // -// /// -///////////////////////////////////////////////////////////////// - - -/** -* This is a caching extension for getID3(). It works the exact same -* way as the getID3 class, but return cached information very fast -* -* Example: -* -* 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.dbm.php'; -* $getID3 = new getID3_cached('db3', '/tmp/getid3_cache.dbm', -* '/tmp/getid3_cache.lock'); -* $getID3->encoding = 'UTF-8'; -* $info1 = $getID3->analyze('file1.flac'); -* $info2 = $getID3->analyze('file2.wv'); -* -* -* Supported Cache Types -* -* SQL Databases: (use extension.cache.mysql) -* -* cache_type cache_options -* ------------------------------------------------------------------- -* mysql host, database, username, password -* -* -* DBM-Style Databases: (this extension) -* -* cache_type cache_options -* ------------------------------------------------------------------- -* gdbm dbm_filename, lock_filename -* ndbm dbm_filename, lock_filename -* db2 dbm_filename, lock_filename -* db3 dbm_filename, lock_filename -* db4 dbm_filename, lock_filename (PHP5 required) -* -* PHP must have write access to both dbm_filename and lock_filename. -* -* -* Recommended Cache Types -* -* Infrequent updates, many reads any DBM -* Frequent updates mysql -*/ - - -class getID3_cached_dbm extends getID3 -{ - - // public: constructor - see top of this file for cache type and cache_options - function getID3_cached_dbm($cache_type, $dbm_filename, $lock_filename) { - - // Check for dba extension - if (!extension_loaded('dba')) { - die('PHP is not compiled with dba support, required to use DBM style cache.'); - } - - // Check for specific dba driver - if (function_exists('dba_handlers')) { // PHP 4.3.0+ - if (!in_array('db3', dba_handlers())) { - die('PHP is not compiled --with '.$cache_type.' support, required to use DBM style cache.'); - } - } - else { // PHP <= 4.2.3 - ob_start(); // nasty, buy the only way to check... - phpinfo(); - $contents = ob_get_contents(); - ob_end_clean(); - if (!strstr($contents, $cache_type)) { - die('PHP is not compiled --with '.$cache_type.' support, required to use DBM style cache.'); - } - } - - // Create lock file if needed - if (!file_exists($lock_filename)) { - if (!touch($lock_filename)) { - die('failed to create lock file: ' . $lock_filename); - } - } - - // Open lock file for writing - if (!is_writeable($lock_filename)) { - die('lock file: ' . $lock_filename . ' is not writable'); - } - $this->lock = fopen($lock_filename, 'w'); - - // Acquire exclusive write lock to lock file - flock($this->lock, LOCK_EX); - - // Create dbm-file if needed - if (!file_exists($dbm_filename)) { - if (!touch($dbm_filename)) { - die('failed to create dbm file: ' . $dbm_filename); - } - } - - // Try to open dbm file for writing - $this->dba = @dba_open($dbm_filename, 'w', $cache_type); - if (!$this->dba) { - - // Failed - create new dbm file - $this->dba = dba_open($dbm_filename, 'n', $cache_type); - - if (!$this->dba) { - die('failed to create dbm file: ' . $dbm_filename); - } - - // Insert getID3 version number - dba_insert(GETID3_VERSION, GETID3_VERSION, $this->dba); - } - - // Init misc values - $this->cache_type = $cache_type; - $this->dbm_filename = $dbm_filename; - - // Register destructor - register_shutdown_function(array($this, '__destruct')); - - // Check version number and clear cache if changed - if (dba_fetch(GETID3_VERSION, $this->dba) != GETID3_VERSION) { - $this->clear_cache(); - } - - parent::getID3(); - } - - - - // public: destuctor - function __destruct() { - - // Close dbm file - @dba_close($this->dba); - - // Release exclusive lock - @flock($this->lock, LOCK_UN); - - // Close lock file - @fclose($this->lock); - } - - - - // public: clear cache - function clear_cache() { - - // Close dbm file - dba_close($this->dba); - - // Create new dbm file - $this->dba = dba_open($this->dbm_filename, 'n', $this->cache_type); - - if (!$this->dba) { - die('failed to clear cache/recreate dbm file: ' . $this->dbm_filename); - } - - // Insert getID3 version number - dba_insert(GETID3_VERSION, GETID3_VERSION, $this->dba); - - // Reregister shutdown function - register_shutdown_function(array($this, '__destruct')); - } - - - - // public: analyze file - function analyze($filename) { - - if (file_exists($filename)) { - - // Calc key filename::mod_time::size - should be unique - $key = $filename . '::' . filemtime($filename) . '::' . filesize($filename); - - // Loopup key - $result = dba_fetch($key, $this->dba); - - // Hit - if ($result !== false) { - return unserialize($result); - } - } - - // Miss - $result = parent::analyze($filename); - - // Save result - if (file_exists($filename)) { - dba_insert($key, serialize($result), $this->dba); - } - - return $result; - } - -} - - -?>
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