Joomla-Sermon-Distributor/site/controllers/download.php

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<?php
/*--------------------------------------------------------------------------------------------------------| www.vdm.io |------/
__ __ _ _____ _ _ __ __ _ _ _
\ \ / / | | | __ \ | | | | | \/ | | | | | | |
\ \ / /_ _ ___| |_ | | | | _____ _____| | ___ _ __ _ __ ___ ___ _ __ | |_ | \ / | ___| |_| |__ ___ __| |
\ \/ / _` / __| __| | | | |/ _ \ \ / / _ \ |/ _ \| '_ \| '_ ` _ \ / _ \ '_ \| __| | |\/| |/ _ \ __| '_ \ / _ \ / _` |
\ / (_| \__ \ |_ | |__| | __/\ V / __/ | (_) | |_) | | | | | | __/ | | | |_ | | | | __/ |_| | | | (_) | (_| |
\/ \__,_|___/\__| |_____/ \___| \_/ \___|_|\___/| .__/|_| |_| |_|\___|_| |_|\__| |_| |_|\___|\__|_| |_|\___/ \__,_|
| |
|_|
/-------------------------------------------------------------------------------------------------------------------------------/
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@version 1.3.4
@build 31st October, 2016
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@created 22nd October, 2015
@package Sermon Distributor
@subpackage download.php
@author Llewellyn van der Merwe <https://www.vdm.io/>
@copyright Copyright (C) 2015. All Rights Reserved
@license GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
A sermon distributor that links to Dropbox.
/-----------------------------------------------------------------------------------------------------------------------------*/
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// No direct access to this file
defined('_JEXEC') or die('Restricted access');
// import Joomla controllerform library
jimport('joomla.application.component.controller');
/**
* Sermondistributor Download Controller
*/
class SermondistributorControllerDownload extends JControllerLegacy
{
public function __construct($config)
{
parent::__construct($config);
// load the tasks
$this->registerTask('file', 'download');
}
public function download()
{
$jinput = JFactory::getApplication()->input;
// Check Token!
$token = JSession::getFormToken();
$call_token = $jinput->get('token', 0, 'ALNUM');
if($token == $call_token)
{
$task = $this->getTask();
switch($task)
{
case 'file':
$keys = $jinput->get('key', NULL, 'BASE64');
$enUrl = $jinput->get('link', NULL, 'BASE64');
$filename = $jinput->get('filename', NULL, 'CMD');
if((base64_encode(base64_decode($enUrl, true)) === $enUrl) && (base64_encode(base64_decode($keys, true)) === $keys) && $filename)
{
// we must first count this download
if (SermondistributorHelper::countDownload($keys,$filename))
{
// get Site name
$config = JFactory::getConfig();
$vendor = $config->get('sitename');
$name = SermondistributorHelper::safeString($filename, 'Ww');
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// Get local key
$localkey = SermondistributorHelper::getLocalKey();
$opener = new FOFEncryptAes($localkey, 128);
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$link = rtrim($opener->decryptString(base64_decode($enUrl)));
$info = $this->getContentInfo($link);
// set headers
$app = JFactory::getApplication();
$app->setHeader('Accept-ranges', 'bytes', true);
$app->setHeader('Connection', 'keep-alive', true);
$app->setHeader('Content-Encoding', 'none', true);
$app->setHeader('Content-disposition', 'attachment; filename="'.$filename.'";', true);
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if (isset($info['type']) && $info['type'])
{
$app->setHeader('Content-Type', $info['type'], true);
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}
elseif (strpos($filename, '.mp3') !== false)
{
$app->setHeader('Content-Type', 'audio/mpeg', true);
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}
else
{
$app->setHeader('Content-Type', 'application/octet-stream', true);
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}
// important to have the file size.
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if (isset($info['filesize']) && $info['filesize'])
{
$app->setHeader('Content-Length', (int) $info['filesize'], true);
$app->setHeader('Content-Size', (int) $info['filesize'], true);
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}
$app->setHeader('Content-security-policy', 'referrer no-referrer', true);
$app->setHeader('Content-Name', '"'.$name.'"', true);
$app->setHeader('Content-Version', '1.0', true);
$app->setHeader('Content-Vendor', '"'.$vendor.'"', true);
$app->setHeader('Content-URL', '"'.JUri::getInstance().'"', true);
$app->setHeader('etag', md5($enUrl), true);
$app->setHeader('Pragma', 'public', true);
$app->setHeader('cache-control', 'max-age=0', true);
$app->setHeader('x-robots-tag', 'noindex, nofollow, noimageindex', true);
$app->setHeader('x-content-security-policy', 'referrer no-referrer', true);
$app->setHeader('x-webkit-csp', 'referrer no-referrer', true);
$app->setHeader('x-content-security-policy', 'referrer no-referrer', true);
// get the file
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readfile($link);
$app->sendHeaders();
$app->close();
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jexit();
}
}
break;
}
}
return false;
}
protected function getContentInfo($url)
{
// we first try the curl option
if ($this->_isCurl())
{
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$data = curl_exec($ch);
curl_close($ch);
}
else
{
// then we try getheaders (this is slower)
stream_context_set_default( array('http' => array('method' => 'HEAD')));
$headers = get_headers($url);
if (SermondistributorHelper::checkArray($headers))
{
$data = implode("\n", $headers);
}
}
// get the Content Length
if (preg_match('/Content-Length: (\d+)/', $data, $matches))
{
// Contains file size in bytes
$found['filesize'] = (int) $matches[1];
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}
// get the Content Type
if (preg_match_all('/Content-Type: (.+)/', $data, $matches))
{
foreach ($matches[1] as $match)
{
// not the html
if (strpos( $match, 'text/html') === false)
{
$found['type'] = $match;
break;
}
}
}
// return found values
if (isset($found) && SermondistributorHelper::checkArray($found))
{
return $found;
}
return false;
}
protected function _isCurl()
{
return function_exists('curl_version');
}
}