Viewing file:  Generic.php (7.32 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/**
* Generic file cache
*/
if (!defined('ABSPATH')) {
die();
}
w3_require_once(W3TC_INC_DIR . '/functions/file.php');
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/File.php');
/**
* Class W3_Cache_File_Generic
*/
class W3_Cache_File_Generic extends W3_Cache_File {
/**
* Expire
*
* @var integer
*/
var $_expire = 0;
/**
* PHP5-style constructor
*
* @param array $config
*/
function __construct($config = array()) {
parent::__construct($config);
$this->_expire = (isset($config['expire']) ? (int) $config['expire'] : 0);
if (!$this->_expire || $this->_expire > W3TC_CACHE_FILE_EXPIRE_MAX) {
$this->_expire = W3TC_CACHE_FILE_EXPIRE_MAX;
}
}
/**
* Sets data
*
* @param string $key
* @param string $var
* @param int $expire
* @param string $group Used to differentiate between groups of cache values
* @return boolean
*/
function set($key, $var, $expire = 0, $group = '') {
$key = $this->get_item_key($key);
$sub_path = $this->_get_path($key);
$path = $this->_cache_dir . '/' . $sub_path;
$dir = dirname($path);
if (!@is_dir($dir)) {
if (!w3_mkdir_from($dir, W3TC_CACHE_DIR))
return false;
}
$fp = @fopen($path, 'w');
if (!$fp)
return false;
if ($this->_locking)
@flock($fp, LOCK_EX);
@fputs($fp, $var['content']);
@fclose($fp);
if ($this->_locking)
@flock($fp, LOCK_UN);
// some hostings create files with restrictive permissions
// not allowing apache to read it later
@chmod($path, 0644);
$old_entry_path = $path . '.old';
@unlink($old_entry_path);
if (w3_is_apache() && isset($var['headers']) &&
isset($var['headers']['Content-Type']) &&
substr($var['headers']['Content-Type'], 0, 8) == 'text/xml') {
file_put_contents(dirname($path) . '/.htaccess',
"<IfModule mod_mime.c>\n" .
" RemoveType .html_gzip\n" .
" AddType text/xml .html_gzip\n" .
" RemoveType .html\n" .
" AddType text/xml .html\n".
"</IfModule>");
}
return true;
}
/**
* Returns data
*
* @param string $key
* @param string $group Used to differentiate between groups of cache values
* @return array
*/
function get_with_old($key, $group = '') {
$has_old_data = false;
$key = $this->get_item_key($key);
$path = $this->_cache_dir . '/' . $this->_get_path($key);
$data = $this->_read($path);
if ($data != null)
return array($data, $has_old_data);
$path_old = $path . '.old';
$too_old_time = time() - 30;
if ($exists = file_exists($path_old) ) {
$file_time = @filemtime($path_old);
if ($file_time) {
if ($file_time > $too_old_time) {
// return old data
$has_old_data = true;
return array($this->_read($path_old), $has_old_data);
}
@touch($path_old);
}
}
$has_old_data = $exists;
return array(null, $has_old_data);
}
/**
* Reads file
*
* @param string $path
* @return array
*/
private function _read($path) {
if (!is_readable($path))
return null;
$fp = @fopen($path, 'r');
if (!$fp)
return null;
if ($this->_locking)
@flock($fp, LOCK_SH);
$var = '';
while (!@feof($fp))
$var .= @fread($fp, 4096);
@fclose($fp);
if ($this->_locking)
@flock($fp, LOCK_UN);
return array(
'404' => false,
'headers' => array(),
'time' => null,
'content' => $var
);
}
/**
* Deletes data
*
* @param string $key
* @param string $group Used to differentiate between groups of cache values
* @return boolean
*/
function delete($key, $group = '') {
$key = $this->get_item_key($key);
$path = $this->_cache_dir . DIRECTORY_SEPARATOR . $this->_get_path($key);
if (!file_exists($path))
return true;
$old_entry_path = $path . '.old';
if (@rename($path, $old_entry_path))
return true;
// if we can delete old entry - do second attempt to store in old-entry file
if (@unlink($old_entry_path)) {
if (@rename($path, $old_entry_path))
return true;
}
return @unlink($path);
}
/**
* Key to delete, deletes .old and primary if exists.
* @param $key
* @return bool
*/
function hard_delete($key) {
$key = $this->get_item_key($key);
$path = $this->_cache_dir . DIRECTORY_SEPARATOR . $this->_get_path($key);
$old_entry_path = $path . '.old';
@unlink($old_entry_path);
if (!file_exists($path))
return true;
@unlink($path);
return true;
}
/**
* Flushes all data
*
* @param string $group Used to differentiate between groups of cache values
* @return boolean
*/
function flush($group = '') {
if ($group == 'sitemaps') {
$config = w3_instance('W3_Config');
$sitemap_regex = $config->get_string('pgcache.purge.sitemap_regex');
$this->_flush_based_on_regex($sitemap_regex);
} else {
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/File/Cleaner/Generic.php');
$c = new W3_Cache_File_Cleaner_Generic(array(
'cache_dir' => $this->_flush_dir,
'exclude' => $this->_exclude,
'clean_timelimit' => $this->_flush_timelimit
));
$c->clean();
}
}
/**
* Returns cache file path by key
*
* @param string $key
* @return string
*/
function _get_path($key) {
return $key;
}
function get_item_key($key) {
/**
* Allow to modify page key by W3TC plugins
*/
$key = w3tc_do_action('w3tc_' . $this->_module . '_cache_key', $key);
return $key;
}
/**
* Flush cache based on regex
* @param string $regex
*/
private function _flush_based_on_regex($regex) {
if (w3_is_multisite() && !w3_is_subdomain_install()) {
$domain = w3_get_home_url();
$parsed = parse_url($domain);
$host = $parsed['host'];
$path = isset($parsed['path']) ? '/' . trim($parsed['path'], '/') : '';
$flush_dir = W3TC_CACHE_PAGE_ENHANCED_DIR . '/' . $host . $path;
} else
$flush_dir = W3TC_CACHE_PAGE_ENHANCED_DIR . '/' . w3_get_domain(w3_get_host());
$dir = @opendir($flush_dir);
if ($dir) {
while (($entry = @readdir($dir)) !== false) {
if ($entry == '.' || $entry == '..') {
continue;
}
if (preg_match('/' . $regex . '/', basename($entry))) {
w3_rmdir($flush_dir . DIRECTORY_SEPARATOR . $entry);
}
}
@closedir($dir);
}
}
}
|