diff options
Diffstat (limited to 'kohana/libraries/drivers/Cache/File.php')
| -rw-r--r-- | kohana/libraries/drivers/Cache/File.php | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/kohana/libraries/drivers/Cache/File.php b/kohana/libraries/drivers/Cache/File.php deleted file mode 100644 index 01d6c383..00000000 --- a/kohana/libraries/drivers/Cache/File.php +++ /dev/null @@ -1,245 +0,0 @@ -<?php defined('SYSPATH') or die('No direct script access.'); -/** - * File-based Cache driver. - * - * $Id$ - * - * @package Cache - * @author Kohana Team - * @copyright (c) 2007-2008 Kohana Team - * @license http://kohanaphp.com/license.html - */ -class Cache_File_Driver implements Cache_Driver { - - protected $directory = ''; - - /** - * Tests that the storage location is a directory and is writable. - */ - public function __construct($directory) - { - // Find the real path to the directory - $directory = str_replace('\\', '/', realpath($directory)).'/'; - - // Make sure the cache directory is writable - if ( ! is_dir($directory) OR ! is_writable($directory)) - throw new Kohana_Exception('cache.unwritable', $directory); - - // Directory is valid - $this->directory = $directory; - } - - /** - * Finds an array of files matching the given id or tag. - * - * @param string cache id or tag - * @param bool search for tags - * @return array of filenames matching the id or tag - * @return void if no matching files are found - */ - public function exists($id, $tag = FALSE) - { - if ($id === TRUE) - { - // Find all the files - $files = glob($this->directory.'*~*~*'); - } - elseif ($tag == TRUE) - { - // Find all the files that have the tag name - $files = glob($this->directory.'*~*'.$id.'*~*'); - - // Find all tags matching the given tag - foreach ($files as $i => $file) - { - // Split the files - $tags = explode('~', $file); - - // Find valid tags - if (count($tags) !== 3 OR empty($tags[1])) - continue; - - // Split the tags by plus signs, used to separate tags - $tags = explode('+', $tags[1]); - - if ( ! in_array($tag, $tags)) - { - // This entry does not match the tag - unset($files[$i]); - } - } - } - else - { - // Find all the files matching the given id - $files = glob($this->directory.$id.'~*'); - } - - return empty($files) ? NULL : $files; - } - - /** - * Sets a cache item to the given data, tags, and lifetime. - * - * @param string cache id to set - * @param string data in the cache - * @param array cache tags - * @param integer lifetime - * @return bool - */ - public function set($id, $data, $tags, $lifetime) - { - // Remove old cache files - $this->delete($id); - - // Cache File driver expects unix timestamp - if ($lifetime !== 0) - { - $lifetime += time(); - } - - // Construct the filename - $filename = $id.'~'.implode('+', $tags).'~'.$lifetime; - - // Write the file, appending the sha1 signature to the beginning of the data - return (bool) file_put_contents($this->directory.$filename, sha1($data).$data); - } - - /** - * Finds an array of ids for a given tag. - * - * @param string tag name - * @return array of ids that match the tag - */ - public function find($tag) - { - if ($files = $this->exists($tag, TRUE)) - { - // Length of directory name - $offset = strlen($this->directory); - - // Find all the files with the given tag - $array = array(); - foreach ($files as $file) - { - // Get the id from the filename - $array[] = substr(current(explode('~', $file)), $offset); - } - - return $array; - } - - return FALSE; - } - - /** - * Fetches a cache item. This will delete the item if it is expired or if - * the hash does not match the stored hash. - * - * @param string cache id - * @return mixed|NULL - */ - public function get($id) - { - if ($file = $this->exists($id)) - { - // Always process the first result - $file = current($file); - - // Validate that the cache has not expired - if ($this->expired($file)) - { - // Remove this cache, it has expired - $this->delete($id); - } - else - { - $data = file_get_contents($file); - - // Find the hash of the data - $hash = substr($data, 0, 40); - - // Remove the hash from the data - $data = substr($data, 40); - - if ($hash !== sha1($data)) - { - // Remove this cache, it doesn't validate - $this->delete($id); - - // Unset data to prevent it from being returned - unset($data); - } - } - } - - // Return NULL if there is no data - return isset($data) ? $data : NULL; - } - - /** - * Deletes a cache item by id or tag - * - * @param string cache id or tag, or TRUE for "all items" - * @param boolean use tags - * @return boolean - */ - public function delete($id, $tag = FALSE) - { - $files = $this->exists($id, $tag); - - if (empty($files)) - return FALSE; - - // Disable all error reporting while deleting - $ER = error_reporting(0); - - foreach ($files as $file) - { - // Remove the cache file - if ( ! unlink($file)) - Kohana::log('error', 'Cache: Unable to delete cache file: '.$file); - } - - // Turn on error reporting again - error_reporting($ER); - - return TRUE; - } - - /** - * Deletes all cache files that are older than the current time. - * - * @return void - */ - public function delete_expired() - { - if ($files = $this->exists(TRUE)) - { - foreach ($files as $file) - { - if ($this->expired($file)) - { - // The cache file has already expired, delete it - @unlink($file) or Kohana::log('error', 'Cache: Unable to delete cache file: '.$file); - } - } - } - } - - /** - * Check if a cache file has expired by filename. - * - * @param string filename - * @return bool - */ - protected function expired($file) - { - // Get the expiration time - $expires = (int) substr($file, strrpos($file, '~') + 1); - - // Expirations of 0 are "never expire" - return ($expires !== 0 AND $expires <= time()); - } - -} // End Cache File Driver
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