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<?php
/**
* @version $Id: media.php 10381 2008-06-01 03:35:53Z pasamio $
* @package Joomla
* @subpackage Media
* @copyright Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant to the
* GNU General Public License, and as distributed it includes or is derivative
* of works licensed under the GNU General Public License or other free or open
* source software licenses. See COPYRIGHT.php for copyright notices and
* details.
*/
/**
* @package Joomla
* @subpackage Media
*/
class MediaHelper
{
/**
* Checks if the file is an image
* @param string The filename
* @return boolean
*/
function isImage( $fileName )
{
static $imageTypes = 'xcf|odg|gif|jpg|png|bmp';
return preg_match("/$imageTypes/i",$fileName);
}
/**
* Checks if the file is an image
* @param string The filename
* @return boolean
*/
function getTypeIcon( $fileName )
{
// Get file extension
return strtolower(substr($fileName, strrpos($fileName, '.') + 1));
}
/**
* Checks if the file can be uploaded
*
* @param array File information
* @param string An error message to be returned
* @return boolean
*/
function canUpload( $file, &$err )
{
$params = &JComponentHelper::getParams( 'com_media' );
if(empty($file['name'])) {
$err = 'Please input a file for upload';
return false;
}
jimport('joomla.filesystem.file');
if ($file['name'] !== JFile::makesafe($file['name'])) {
$err = 'WARNFILENAME';
return false;
}
$format = strtolower(JFile::getExt($file['name']));
$allowable = explode( ',', $params->get( 'upload_extensions' ));
$ignored = explode(',', $params->get( 'ignore_extensions' ));
if (!in_array($format, $allowable) && !in_array($format,$ignored))
{
$err = 'WARNFILETYPE';
return false;
}
$maxSize = (int) $params->get( 'upload_maxsize', 0 );
if ($maxSize > 0 && (int) $file['size'] > $maxSize)
{
$err = 'WARNFILETOOLARGE';
return false;
}
$user = JFactory::getUser();
$imginfo = null;
if($params->get('restrict_uploads',1) ) {
$images = explode( ',', $params->get( 'image_extensions' ));
if(in_array($format, $images)) { // if its an image run it through getimagesize
if(($imginfo = getimagesize($file['tmp_name'])) === FALSE) {
$err = 'WARNINVALIDIMG';
return false;
}
} else if(!in_array($format, $ignored)) {
// if its not an image...and we're not ignoring it
$allowed_mime = explode(',', $params->get('upload_mime'));
$illegal_mime = explode(',', $params->get('upload_mime_illegal'));
if(function_exists('finfo_open') && $params->get('check_mime',1)) {
// We have fileinfo
$finfo = finfo_open(FILEINFO_MIME);
$type = finfo_file($finfo, $file['tmp_name']);
if(strlen($type) && !in_array($type, $allowed_mime) && in_array($type, $illegal_mime)) {
$err = 'WARNINVALIDMIME';
return false;
}
finfo_close($finfo);
} else if(function_exists('mime_content_type') && $params->get('check_mime',1)) {
// we have mime magic
$type = mime_content_type($file['tmp_name']);
if(strlen($type) && !in_array($type, $allowed_mime) && in_array($type, $illegal_mime)) {
$err = 'WARNINVALIDMIME';
return false;
}
} else if(!$user->authorize( 'login', 'administrator' )) {
$err = 'WARNNOTADMIN';
return false;
}
}
}
$xss_check = JFile::read($file['tmp_name'],false,256);
$html_tags = array('abbr','acronym','address','applet','area','audioscope','base','basefont','bdo','bgsound','big','blackface','blink','blockquote','body','bq','br','button','caption','center','cite','code','col','colgroup','comment','custom','dd','del','dfn','dir','div','dl','dt','em','embed','fieldset','fn','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','iframe','ilayer','img','input','ins','isindex','keygen','kbd','label','layer','legend','li','limittext','link','listing','map','marquee','menu','meta','multicol','nobr','noembed','noframes','noscript','nosmartquotes','object','ol','optgroup','option','param','plaintext','pre','rt','ruby','s','samp','script','select','server','shadow','sidebar','small','spacer','span','strike','strong','style','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','ul','var','wbr','xml','xmp','!DOCTYPE', '!--');
foreach($html_tags as $tag) {
// A tag is '<tagname ', so we need to add < and a space or '<tagname>'
if(stristr($xss_check, '<'.$tag.' ') || stristr($xss_check, '<'.$tag.'>')) {
$err = 'WARNIEXSS';
return false;
}
}
return true;
}
function parseSize($size)
{
if ($size < 1024) {
return $size . ' bytes';
}
else
{
if ($size >= 1024 && $size < 1024 * 1024) {
return sprintf('%01.2f', $size / 1024.0) . ' Kb';
} else {
return sprintf('%01.2f', $size / (1024.0 * 1024)) . ' Mb';
}
}
}
function imageResize($width, $height, $target)
{
//takes the larger size of the width and height and applies the
//formula accordingly...this is so this script will work
//dynamically with any size image
if ($width > $height) {
$percentage = ($target / $width);
} else {
$percentage = ($target / $height);
}
//gets the new value and applies the percentage, then rounds the value
$width = round($width * $percentage);
$height = round($height * $percentage);
return array($width, $height);
}
function countFiles( $dir )
{
$total_file = 0;
$total_dir = 0;
if (is_dir($dir)) {
$d = dir($dir);
while (false !== ($entry = $d->read())) {
if (substr($entry, 0, 1) != '.' && is_file($dir . DIRECTORY_SEPARATOR . $entry) && strpos($entry, '.html') === false && strpos($entry, '.php') === false) {
$total_file++;
}
if (substr($entry, 0, 1) != '.' && is_dir($dir . DIRECTORY_SEPARATOR . $entry)) {
$total_dir++;
}
}
$d->close();
}
return array ( $total_file, $total_dir );
}
}