<?php
/**
* Class Minify_Cache_File
* @package Minify
*/
class Minify_Cache_File {
public function __construct($path = '', $fileLocking = false)
{
if (! $path) {
$path = self::tmp();
}
$this->_locking = $fileLocking;
$this->_path = $path;
}
/**
* Write data to cache.
*
* @param string $id cache id (e.g. a filename)
*
* @param string $data
*
* @return bool success
*/
public function store($id, $data)
{
$flag = $this->_locking
? LOCK_EX
: null;
$file = $this->_path . '/' . $id;
if (! @file_put_contents($file, $data, $flag)) {
$this->_log("Minify_Cache_File: Write failed to '$file'");
}
// write control
if ($data !== $this->fetch($id)) {
@unlink($file);
$this->_log("Minify_Cache_File: Post-write read failed for '$file'");
return false;
}
return true;
}
/**
* Get the size of a cache entry
*
* @param string $id cache id (e.g. a filename)
*
* @return int size in bytes
*/
public function getSize($id)
{
return filesize($this->_path . '/' . $id);
}
/**
* Does a valid cache entry exist?
*
* @param string $id cache id (e.g. a filename)
*
* @param int $srcMtime mtime of the original source file(s)
*
* @return bool exists
*/
public function isValid($id, $srcMtime)
{
$file = $this->_path . '/' . $id;
return (is_file($file) && (filemtime($file) >= $srcMtime));
}
/**
* Send the cached content to output
*
* @param string $id cache id (e.g. a filename)
*/
public function display($id)
{
if ($this->_locking) {
$fp = fopen($this->_path . '/' . $id, 'rb');
flock($fp, LOCK_SH);
fpassthru($fp);
flock($fp, LOCK_UN);
fclose($fp);
} else {
readfile($this->_path . '/' . $id);
}
}
/**
* Fetch the cached content
*
* @param string $id cache id (e.g. a filename)
*
* @return string
*/
public function fetch($id)
{
if ($this->_locking) {
$fp = fopen($this->_path . '/' . $id, 'rb');
if (!$fp) {
return false;
}
flock($fp, LOCK_SH);
$ret = stream_get_contents($fp);
flock($fp, LOCK_UN);
fclose($fp);
return $ret;
} else {
return file_get_contents($this->_path . '/' . $id);
}
}
/**
* Fetch the cache path used
*
* @return string
*/
public function getPath()
{
return $this->_path;
}
/**
* Get a usable temp directory
*
* Adapted from Solar/Dir.php
* @author Paul M. Jones <pmjones@solarphp.com>
* @license http://opensource.org/licenses/bsd-license.php BSD
* @link http://solarphp.com/trac/core/browser/trunk/Solar/Dir.php
*
* @return string
*/
public static function tmp()
{
static $tmp = null;
if (! $tmp) {
$tmp = function_exists('sys_get_temp_dir')
? sys_get_temp_dir()
: self::_tmp();
$tmp = rtrim($tmp, DIRECTORY_SEPARATOR);
}
return $tmp;
}
/**
* Returns the OS-specific directory for temporary files
*
* @author Paul M. Jones <pmjones@solarphp.com>
* @license http://opensource.org/licenses/bsd-license.php BSD
* @link http://solarphp.com/trac/core/browser/trunk/Solar/Dir.php
*
* @return string
*/
protected static function _tmp()
{
// non-Windows system?
if (strtolower(substr(PHP_OS, 0, 3)) != 'win') {
$tmp = empty($_ENV['TMPDIR']) ? getenv('TMPDIR') : $_ENV['TMPDIR'];
if ($tmp) {
return $tmp;
} else {
return '/tmp';
}
}
// Windows 'TEMP'
$tmp = empty($_ENV['TEMP']) ? getenv('TEMP') : $_ENV['TEMP'];
if ($tmp) {
return $tmp;
}
// Windows 'TMP'
$tmp = empty($_ENV['TMP']) ? getenv('TMP') : $_ENV['TMP'];
if ($tmp) {
return $tmp;
}
// Windows 'windir'
$tmp = empty($_ENV['windir']) ? getenv('windir') : $_ENV['windir'];
if ($tmp) {
return $tmp;
}
// final fallback for Windows
return getenv('SystemRoot') . '\\temp';
}
/**
* Send message to the Minify logger
* @param string $msg
* @return null
*/
protected function _log($msg)
{
Minify_Logger::log($msg);
}
private $_path = null;
private $_locking = null;
}