Http.php
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<?php
/**
* @package Regular Labs Library
* @version 18.2.10140
*
* @author Peter van Westen <info@regularlabs.com>
* @link http://www.regularlabs.com
* @copyright Copyright © 2018 Regular Labs All Rights Reserved
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
*/
namespace RegularLabs\Library;
defined('_JEXEC') or die;
use JFactory;
use JHttpFactory;
use RuntimeException;
/**
* Class Http
* @package RegularLabs\Library
*/
class Http
{
/**
* Get the contents of the given internal url
*
* @param string $url
* @param int $timeout
*
* @return string
*/
public static function get($url, $timeout = 20)
{
if (Uri::isExternal($url))
{
return '';
}
return self::getFromUrl($url, $timeout);
}
/**
* Get the contents of the given url
*
* @param string $url
* @param int $timeout
*
* @return string
*/
public static function getFromUrl($url, $timeout = 20)
{
$cache_id = 'getUrl_' . $url;
if (Cache::has($cache_id))
{
return Cache::get($cache_id);
}
if (JFactory::getApplication()->input->getInt('cache', 0)
&& $content = Cache::read($cache_id)
)
{
return $content;
}
$content = self::getContents($url, $timeout);
if (empty($content))
{
return '';
}
if ($ttl = JFactory::getApplication()->input->getInt('cache', 0))
{
return Cache::write($cache_id, $content, $ttl > 1 ? $ttl : 0);
}
return Cache::set($cache_id, $content);
}
/**
* Get the contents of the given external url from the Regular Labs server
*
* @param string $url
* @param int $timeout
*
* @return string
*/
public static function getFromServer($url, $timeout = 20)
{
$cache_id = 'getByUrl_' . $url;
if (Cache::has($cache_id))
{
return Cache::get($cache_id);
}
// only allow url calls from administrator
if ( ! Document::isClient('administrator'))
{
die;
}
// only allow when logged in
$user = JFactory::getUser();
if ( ! $user->id)
{
die;
}
if (substr($url, 0, 4) != 'http')
{
$url = 'http://' . $url;
}
// only allow url calls to regularlabs.com domain
if ( ! (RegEx::match('^https?://([^/]+\.)?regularlabs\.com/', $url)))
{
die;
}
// only allow url calls to certain files
if (
strpos($url, 'download.regularlabs.com/extensions.php') === false
&& strpos($url, 'download.regularlabs.com/extensions.json') === false
&& strpos($url, 'download.regularlabs.com/extensions.xml') === false
)
{
die;
}
$content = self::getContents($url, $timeout);
if (empty($content))
{
return '';
}
$format = (strpos($url, '.json') !== false || strpos($url, 'format=json') !== false)
? 'application/json'
: 'text/xml';
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-type: " . $format);
if ($ttl = JFactory::getApplication()->input->getInt('cache', 0))
{
return Cache::write($cache_id, $content, $ttl > 1 ? $ttl : 0);
}
return Cache::set($cache_id, $content);
}
/**
* Load the contents of the given url
*
* @param string $url
* @param int $timeout
*
* @return string
*/
private static function getContents($url, $timeout = 20)
{
try
{
$content = JHttpFactory::getHttp()->get($url, null, $timeout)->body;
}
catch (RuntimeException $e)
{
return '';
}
return $content;
}
}