154 lines
4.0 KiB
PHP
154 lines
4.0 KiB
PHP
<?php
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/**
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*
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* @version 2.0.0 - September 03, 2014
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* @package Component Builder
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* @author Llewellyn van de Merwe <http://www.vdm.io>
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* @copyright Copyright (C) 2014. All Rights Reserved
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* @license GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
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*
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**/
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// No direct access to this file
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defined('_JEXEC') or die('Restricted access');
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?>
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###BOM###
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// No direct access to this file
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defined('_JEXEC') or die('Restricted access');
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// import Joomla controllerform library
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jimport('joomla.application.component.controller');
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/**
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* ###Component### Download Controller
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*/
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class ###Component###ControllerDownload extends JControllerLegacy
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{
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public function __construct($config)
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{
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parent::__construct($config);
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// load the tasks
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$this->registerTask('file', 'download');
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}
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public function download()
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{
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$user = JFactory::getUser();
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$jinput = JFactory::getApplication()->input;
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// Check Token!
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$token = JSession::getFormToken();
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$call_token = $jinput->get('token', 0, 'ALNUM');
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$userAllowed = $jinput->get('key', NULL, 'INT');
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if($user->id != 0 && $userAllowed == $user->id && $token == $call_token)
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{
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$task = $this->getTask();
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switch($task)
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{
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case 'file':
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$enUrl = $jinput->get('link', NULL, 'BASE64');
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$filename = $jinput->get('filename', NULL, 'CMD');
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if(base64_encode(base64_decode($enUrl, true)) === $enUrl && $filename)
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{
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// Get local key
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$localkey = md5(JComponentHelper::getParams('com_###component###')->get('basic_key', 'localKey34fdWEkl'));
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$opener = new FOFEncryptAes($localkey, 256);
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$link = rtrim($opener->decryptString(base64_decode($enUrl)));
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$info = $this->getContentInfo($link);
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// set headers
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if (isset($info['type']) && $info['type'])
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{
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header('Content-Type: '.$info['type']);
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}
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elseif (strpos($filename, '.mp3') !== false)
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{
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header('Content-Type: audio/mpeg');
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}
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else
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{
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header('Content-Type: application/octet-stream');
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}
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header("Content-Transfer-Encoding: Binary");
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header("Content-disposition: attachment; filename=\"" . $filename . "\"");
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header('Expires: 0');
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header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
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header('Pragma: public');
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if (isset($info['filesize']) && $info['filesize'])
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{
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header('Content-Length: ' . $info['filesize']);
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}
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ob_clean();
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flush();
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// this is faster but expose the dropbox url
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// header("Location: $link");
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// this is slower but better much more secure
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readfile($link);
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jexit();
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}
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break;
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}
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}
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return false;
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}
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protected function getContentInfo($url)
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{
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// we first try the curl option
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if ($this->_isCurl())
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{
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_NOBODY, true);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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$data = curl_exec($ch);
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curl_close($ch);
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}
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else
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{
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// then we try getheaders (this is slower)
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stream_context_set_default( array('http' => array('method' => 'HEAD')));
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$headers = get_headers($url);
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if (###Component###Helper::checkArray($headers))
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{
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$data = implode("\n", $headers);
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}
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}
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// get the Content Length
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if (preg_match('/Content-Length: (\d+)/', $data, $matches))
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{
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// Contains file size in bytes
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$found['filesize'] = (int)$matches[1];
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}
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// get the Content Type
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if (preg_match_all('/Content-Type: (.+)/', $data, $matches))
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{
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foreach ($matches[1] as $match)
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{
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// not the html
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if (strpos( $match, 'text/html') === false)
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{
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$found['type'] = $match;
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break;
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}
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}
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}
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// return found values
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if (isset($found) && ###Component###Helper::checkArray($found))
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{
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return $found;
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}
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return false;
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}
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protected function _isCurl()
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{
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return function_exists('curl_version');
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}
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}
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