/
cache-fs.php
executable file
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/
cache-fs.php
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<?php
/**
* cache_fs
*
* @package Semiologic Cache
**/
class cache_fs {
private static $base_dir;
/**
* start()
*
* @return void
**/
static function start() {
if ( strpos($_SERVER['HTTP_HOST'], '/') !== false )
trigger_error(sprintf('%s is not a valid hostname', $_SERVER['HTTP_HOST']), E_USER_ERROR);
self::$base_dir = defined('SUBDOMAIN_INSTALL') && SUBDOMAIN_INSTALL
? WP_CONTENT_DIR . '/cache/' . $_SERVER['HTTP_HOST']
: WP_CONTENT_DIR . '/cache';
} # start()
/**
* path_join()
*
* @param string $file
* @return string $file
**/
static protected function path_join($file) {
return rtrim(self::$base_dir . '/' . ltrim($file, '/'), '/');
} # path_join()
/**
* exists()
*
* @param string $file
* @param bool|int $timeout
* @return bool $valid
*/
static function exists($file, $timeout = false) {
$file = self::path_join($file);
return file_exists($file)
&& ( !$timeout || ( filemtime($file) + $timeout >= time() ) );
} # exists()
/**
* get_contents()
*
* @param string $file
* @return string $contents
**/
static function get_contents($file) {
$file = self::path_join($file);
return file_get_contents($file);
} # get_contents()
/**
* readfile()
*
* @param string $file
* @return int $bytes
**/
static function readfile($file) {
$file = self::path_join($file);
return readfile($file);
} # readfile()
/**
* put_contents()
*
* @param $file
* @param $contents
* @return bool $success
*/
static function put_contents($file, $contents) {
$file = self::path_join($file);
# bail if the file was concurrently built
if ( self::exists($file, 300) )
return true;
$dir = dirname($file);
if ( !wp_mkdir_p($dir) )
return false;
$perms = stat($dir);
$perms = $perms['mode'] & 0000666;
# work on a temporary file to bypass file locking requirements
$tmp = tempnam($dir, 'new_');
if ( !file_put_contents($tmp, $contents) ) {
unlink($tmp);
return false;
}
if ( !chmod($tmp, $perms) || !rename($tmp, $file) ) {
unlink($tmp);
return false;
}
return true;
} # put_contents()
/**
* flush()
*
* @param string $dir
* @param bool|int $timeout
* @param bool $recursive
* @return bool $success
*/
static function flush($dir = '/', $timeout = false, $recursive = true) {
if ( function_exists('is_multisite') && is_multisite() )
return false;
return self::rm(self::path_join($dir), $timeout, $recursive);
} # flush()
/**
* rm()
*
* @param string $dir
* @param bool|int $timeout
* @param bool $recursive
* @return bool $success
*/
static protected function rm($dir, $timeout = false, $recursive = true) {
$dir = rtrim($dir, '/');
if ( empty($dir) )
return true;
if ( !file_exists($dir) )
return true;
if ( !is_dir($dir) ) {
$success = true;
if ( $timeout !== false ) {
$filemtime = @filemtime($dir);
if ( $filemtime && (time() - $filemtime >= $timeout) )
$success = @unlink($dir);
}
else // no timeout so just delete
$success = @unlink($dir);
clearstatcache();
return $success;
}
elseif ( !$recursive )
return is_file("$dir/index.html") ? self::rm("$dir/index.html", $timeout, $recursive) : true;
if ( !( $handle = opendir($dir) ) )
return false;
$success = true;
while ( ( $file = readdir($handle) ) !== false ) {
if ( in_array($file, array('.', '..')) )
continue;
$success &= self::rm("$dir/$file", $timeout, $recursive);
}
closedir($handle);
return $timeout || @rmdir($dir) && $success;
} # rm()
/**
* stats()
*
* @param string $dir
* @param bool $timeout
* @param null $bucket
* @return array($total_pages, $expired_pages)
*/
static function stats($dir = '/', $timeout = false, $bucket = null) {
static $total_pages = 0;
static $expired_pages = 0;
if ( !isset($bucket) ) {
$bucket = $dir;
$total_pages = 0;
$expired_pages = 0;
$dir = self::path_join($bucket);
}
# asset files never expire
if ( $dir == self::$base_dir . '/assets' )
$timeout = false;
if ( !file_exists($dir) ) {
return array($total_pages, $expired_pages);
} elseif ( is_file($dir) ) {
$total_pages++;
if ( $timeout && ( filemtime($dir) + $timeout < time() ) )
$expired_pages++;
return array($total_pages, $expired_pages);
} else {
if ( !( $handle = opendir($dir) ) )
return array($total_pages, $expired_pages);
while ( ( $file = readdir($handle) ) !== false ) {
if ( in_array($file, array('.', '..', '.DS_Store')) )
continue;
self::stats("$dir/$file", $timeout, $bucket);
}
closedir($handle);
return array($total_pages, $expired_pages);
}
} # stats()
} # cache_fs
cache_fs::start();