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alazhar
2020-01-02 22:20:31 +07:00
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administrator/components/com_media/helpers/media.php Normal file
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<?php
/**
* @package Joomla.Administrator
* @subpackage com_media
*
* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
/**
* @package Joomla.Administrator
* @subpackage com_media
* @since 1.5
*/
abstract class MediaHelper
{
/**
* Checks if the file is an image
* @param string The filename
* @return boolean
*/
public static function isImage($fileName)
{
static $imageTypes = 'xcf|odg|gif|jpg|png|bmp';
return preg_match("/\.(?:$imageTypes)$/i", $fileName);
}
/**
* Checks if the file is an image
* @param string The filename
* @return boolean
*/
public static function getTypeIcon($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
*/
public static function canUpload($file, &$err)
{
$params = JComponentHelper::getParams('com_media');
if (empty($file['name']))
{
$err = 'COM_MEDIA_ERROR_UPLOAD_INPUT';
return false;
}
jimport('joomla.filesystem.file');
if ($file['name'] !== JFile::makesafe($file['name']))
{
$err = 'COM_MEDIA_ERROR_WARNFILENAME';
return false;
}
$format = strtolower(JFile::getExt($file['name']));
$allowable = explode(',', $params->get('upload_extensions'));
$ignored = explode(',', $params->get('ignore_extensions'));
if ($format == '' || $format == false || (!in_array($format, $allowable) && !in_array($format, $ignored)))
{
$err = 'COM_MEDIA_ERROR_WARNFILETYPE';
return false;
}
$maxSize = (int) ($params->get('upload_maxsize', 0) * 1024 * 1024);
if ($maxSize > 0 && (int) $file['size'] > $maxSize)
{
$err = 'COM_MEDIA_ERROR_WARNFILETOOLARGE';
return false;
}
$user = JFactory::getUser();
$imginfo = null;
if ($params->get('restrict_uploads', 1))
{
$images = explode(',', $params->get('image_extensions'));
if (in_array($format, $images)) { // if its an image run it through getimagesize
// if tmp_name is empty, then the file was bigger than the PHP limit
if (!empty($file['tmp_name']))
{
if (($imginfo = getimagesize($file['tmp_name'])) === false)
{
$err = 'COM_MEDIA_ERROR_WARNINVALID_IMG';
return false;
}
} else {
$err = 'COM_MEDIA_ERROR_WARNFILETOOLARGE';
return false;
}
} elseif (!in_array($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))
{
$err = 'COM_MEDIA_ERROR_WARNINVALID_MIME';
return false;
}
finfo_close($finfo);
} elseif (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))
{
$err = 'COM_MEDIA_ERROR_WARNINVALID_MIME';
return false;
}
} elseif (!$user->authorise('core.manage'))
{
$err = 'COM_MEDIA_ERROR_WARNNOTADMIN';
return false;
}
}
}
$xss_check = file_get_contents($file['tmp_name'], false, null, -1, 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 = 'COM_MEDIA_ERROR_WARNIEXSS';
return false;
}
}
return true;
}
/**
* Method to parse a file size
*
* @param integer $size The file size in bytes
*
* @return string The converted file size
*
* @since 1.6
* @deprecated 4.0 Use JHtmlNumber::bytes() instead
*/
public static function parseSize($size)
{
JLog::add('MediaHelper::parseSize() is deprecated. Use JHtmlNumber::bytes() instead.', JLog::WARNING, 'deprecated');
return JHtml::_('number.bytes', $size);
}
public static function imageResize($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, $height);
}
public static function countFiles($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);
}
}