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<?php
namespace Coderatio\Curler\Services;
use RuntimeException;
/**
* This class is used by cURL class, use case:
*
* $c = new CurlService(array('cache'=>true), 'module_cache'=>'repository');
* $ret = $c->get('http://www.google.com');
*
* @copyright Coderatio
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
*/
class CurlerCacheService
{
/** @var string */
public $dir = '';
/**
*
* @param string @module which module is using curl_cache
*
*/
public function __construct()
{
$this->dir = '/tmp/';
if (!file_exists($this->dir) && !mkdir($concurrentDirectory = $this->dir, 0700, true) && !is_dir($concurrentDirectory)) {
throw new RuntimeException(sprintf('Directory "%s" was not created', $concurrentDirectory));
}
$this->ttl = 1200;
}
/**
* Get cached value
*
* @param mixed $param
* @return bool|string
*/
public function get($param)
{
$this->cleanup($this->ttl);
$filename = 'u_' . md5(serialize($param));
if (file_exists($this->dir . $filename)) {
$lasttime = filemtime($this->dir . $filename);
if (time() - $lasttime > $this->ttl) {
return false;
}
$fp = fopen($this->dir . $filename, 'rb');
$size = filesize($this->dir . $filename);
$content = fread($fp, $size);
return unserialize($content);
}
return false;
}
/**
* Set cache value
*
* @param mixed $param
* @param mixed $val
*/
public function set($param, $val): void
{
$filename = 'u_' . md5(serialize($param));
$fp = fopen($this->dir . $filename, 'wb');
fwrite($fp, serialize($val));
fclose($fp);
}
/**
* Remove cache files
*
* @param int $expire The number os seconds before expiry
*/
public function cleanup($expire): void
{
if ($dir = opendir($this->dir)) {
while (false !== ($file = readdir($dir))) {
if ($file !== '.' && $file !== '..' && !is_dir($file)) {
$lasttime = @filemtime($this->dir . $file);
if (time() - $lasttime > $expire) {
@unlink($this->dir . $file);
}
}
}
}
}
/**
* delete current user's cache file
*
*/
public function refresh(): void
{
if ($dir = opendir($this->dir)) {
while (false !== ($file = readdir($dir))) {
if ($file !== '.' && $file !== '..' && !is_dir($file) && strpos($file, 'u_') !== false) {
@unlink($this->dir . $file);
}
}
}
}
}