/usr/share/simpleid/www/cache.inc is in simpleid 0.8.1-14.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* SimpleID
*
* Copyright (C) Kelvin Mo 2007-9
*
* Includes code Drupal OpenID module (http://drupal.org/project/openid)
* Rowan Kerr <rowan@standardinteractive.com>
* James Walker <james@bryght.com>
*
* Copyright (C) Rowan Kerr and James Walker
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: cache.inc 216 2009-10-29 12:04:47Z kmo $
*/
/**
* Functions for caching and persistence.
*
* @package simpleid
* @filesource
*/
/**
* Stores data into the cache.
*
* @param string $type the type of data in the cache
* @param string $key an identifier
* @param mixed $data the data to store
* @param int $time if present, sets the modification time of the cache file to this
* time
*/
function cache_set($type, $key, $data, $time = NULL) {
$filename = _cache_get_name($type, $key);
$file = fopen($filename, 'w');
fwrite($file, serialize($data));
fclose($file);
if ($time != NULL) {
touch($filename, $time);
}
}
/**
* Obtains data from the cache.
*
* @param string $type the type of data in the cache
* @param string $key an identifier
* @return mixed the data associated with the type and key, or NULL if the cache
* does not contain the requested data.
*/
function cache_get($type, $key) {
$filename = _cache_get_name($type, $key);
if (!file_exists($filename)) return NULL;
return unserialize(file_get_contents($filename));
}
/**
* Obtains all data of a particular type from the cache.
*
* @param string $type the type of data in the cache
* @return mixed an array of data associated with the type, or NULL if the cache
* does not contain the requested data.
*/
function cache_get_all($type) {
$r = array();
$dir = opendir(CACHE_DIR);
while (($file = readdir($dir)) !== false) {
$filename = CACHE_DIR . '/' . $file;
if ((filetype($filename) != "file") || (strpos($file, $type . '-') !== 0)) continue;
$r[] = unserialize(file_get_contents($filename));
}
closedir($dir);
return $r;
}
/**
* Deletes data from the cache.
*
* @param string $type the type of data in the cache
* @param string $key an identifier
*/
function cache_delete($type, $key) {
$filename = _cache_get_name($type, $key);
if (file_exists($filename)) unlink($filename);
}
/**
* Garbage collects data stored the cache. Data is deleted if it was stored
* for longer than the specified expiry
*
* @param int $expiry the expiry time, in seconds, after which data will be deleted
* @param string $type the type of data in the cache
*/
function cache_gc($expiry, $type = NULL) {
$dir = opendir(CACHE_DIR);
while (($file = readdir($dir)) !== false) {
$filename = CACHE_DIR . '/' . $file;
if (($type != NULL) && (strpos($file, $type . '-') !== 0)) continue;
if ((filetype($filename) == "file") && (filectime($filename) < time() - $expiry)) {
unlink($filename);
}
}
closedir($dir);
}
/**
* Returns the time remaining, in seconds, before the data associated with the
* type and key become subject to garbage collection by {@link cache_gc()}.
*
* @param string $type the type of data in the cache
* @param string $key an identifier
* @param int $expiry the expiry time, in seconds, which would be passed onto the
* {@link cache_gc()} function
* @return int the time remaining before expiry, rounded downwards,
* or zero if the cache does not contain the requested data
* @since 0.8
*/
function cache_ttl($type, $key, $expiry) {
$filename = _cache_get_name($type, $key);
if (!file_exists($filename)) return 0;
return filectime($filename) - (time() - $expiry) - 1;
}
/**
* Returns the name of the cache data file, given a type and an identifier.
*
* @param string $type the type of data in the cache
* @param string $key an identifier
* @return string a file name
*/
function _cache_get_name($type, $key) {
return CACHE_DIR . '/' . $type . '-' . md5($key) . '.cache';
}
?>
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