213 lines
6.4 KiB
PHP
213 lines
6.4 KiB
PHP
<?php
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/**
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* @package Joomla.Administrator
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* @subpackage com_media
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE.txt
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*/
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defined('_JEXEC') or die;
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/**
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* @package Joomla.Administrator
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* @subpackage com_media
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* @since 1.5
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*/
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abstract class MediaHelper
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{
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/**
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* Checks if the file is an image
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* @param string The filename
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* @return boolean
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*/
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public static function isImage($fileName)
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{
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static $imageTypes = 'xcf|odg|gif|jpg|png|bmp';
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return preg_match("/\.(?:$imageTypes)$/i", $fileName);
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}
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/**
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* Checks if the file is an image
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* @param string The filename
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* @return boolean
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*/
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public static function getTypeIcon($fileName)
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{
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// Get file extension
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return strtolower(substr($fileName, strrpos($fileName, '.') + 1));
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}
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/**
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* Checks if the file can be uploaded
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*
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* @param array File information
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* @param string An error message to be returned
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* @return boolean
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*/
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public static function canUpload($file, &$err)
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{
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$params = JComponentHelper::getParams('com_media');
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if (empty($file['name']))
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{
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$err = 'COM_MEDIA_ERROR_UPLOAD_INPUT';
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return false;
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}
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jimport('joomla.filesystem.file');
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if ($file['name'] !== JFile::makesafe($file['name']))
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{
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$err = 'COM_MEDIA_ERROR_WARNFILENAME';
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return false;
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}
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$format = strtolower(JFile::getExt($file['name']));
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$allowable = explode(',', $params->get('upload_extensions'));
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$ignored = explode(',', $params->get('ignore_extensions'));
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if ($format == '' || $format == false || (!in_array($format, $allowable) && !in_array($format, $ignored)))
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{
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$err = 'COM_MEDIA_ERROR_WARNFILETYPE';
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return false;
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}
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$maxSize = (int) ($params->get('upload_maxsize', 0) * 1024 * 1024);
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if ($maxSize > 0 && (int) $file['size'] > $maxSize)
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{
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$err = 'COM_MEDIA_ERROR_WARNFILETOOLARGE';
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return false;
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}
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$user = JFactory::getUser();
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$imginfo = null;
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if ($params->get('restrict_uploads', 1))
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{
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$images = explode(',', $params->get('image_extensions'));
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if (in_array($format, $images)) { // if its an image run it through getimagesize
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// if tmp_name is empty, then the file was bigger than the PHP limit
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if (!empty($file['tmp_name']))
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{
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if (($imginfo = getimagesize($file['tmp_name'])) === false)
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{
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$err = 'COM_MEDIA_ERROR_WARNINVALID_IMG';
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return false;
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}
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} else {
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$err = 'COM_MEDIA_ERROR_WARNFILETOOLARGE';
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return false;
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}
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} elseif (!in_array($format, $ignored))
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{
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// if its not an image...and we're not ignoring it
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$allowed_mime = explode(',', $params->get('upload_mime'));
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$illegal_mime = explode(',', $params->get('upload_mime_illegal'));
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if (function_exists('finfo_open') && $params->get('check_mime', 1))
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{
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// We have fileinfo
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$finfo = finfo_open(FILEINFO_MIME);
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$type = finfo_file($finfo, $file['tmp_name']);
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if (strlen($type) && !in_array($type, $allowed_mime) && in_array($type, $illegal_mime))
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{
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$err = 'COM_MEDIA_ERROR_WARNINVALID_MIME';
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return false;
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}
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finfo_close($finfo);
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} elseif (function_exists('mime_content_type') && $params->get('check_mime', 1))
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{
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// we have mime magic
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$type = mime_content_type($file['tmp_name']);
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if (strlen($type) && !in_array($type, $allowed_mime) && in_array($type, $illegal_mime))
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{
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$err = 'COM_MEDIA_ERROR_WARNINVALID_MIME';
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return false;
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}
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} elseif (!$user->authorise('core.manage'))
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{
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$err = 'COM_MEDIA_ERROR_WARNNOTADMIN';
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return false;
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}
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}
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}
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$xss_check = file_get_contents($file['tmp_name'], false, null, -1, 256);
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$html_tags = array('abbr', 'acronym', 'address', 'applet', 'area', 'audioscope', 'base', 'basefont', 'bdo', 'bgsound', 'big', 'blackface', 'blink', 'blockquote', 'body', 'bq', 'br', 'button', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'comment', 'custom', 'dd', 'del', 'dfn', 'dir', 'div', 'dl', 'dt', 'em', 'embed', 'fieldset', 'fn', 'font', 'form', 'frame', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'hr', 'html', 'iframe', 'ilayer', 'img', 'input', 'ins', 'isindex', 'keygen', 'kbd', 'label', 'layer', 'legend', 'li', 'limittext', 'link', 'listing', 'map', 'marquee', 'menu', 'meta', 'multicol', 'nobr', 'noembed', 'noframes', 'noscript', 'nosmartquotes', 'object', 'ol', 'optgroup', 'option', 'param', 'plaintext', 'pre', 'rt', 'ruby', 's', 'samp', 'script', 'select', 'server', 'shadow', 'sidebar', 'small', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'sup', 'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'thead', 'title', 'tr', 'tt', 'ul', 'var', 'wbr', 'xml', 'xmp', '!DOCTYPE', '!--');
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foreach ($html_tags as $tag)
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{
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// A tag is '<tagname ', so we need to add < and a space or '<tagname>'
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if (stristr($xss_check, '<'.$tag.' ') || stristr($xss_check, '<'.$tag.'>'))
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{
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$err = 'COM_MEDIA_ERROR_WARNIEXSS';
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return false;
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}
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}
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return true;
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}
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/**
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* Method to parse a file size
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*
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* @param integer $size The file size in bytes
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*
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* @return string The converted file size
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*
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* @since 1.6
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* @deprecated 4.0 Use JHtmlNumber::bytes() instead
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*/
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public static function parseSize($size)
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{
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JLog::add('MediaHelper::parseSize() is deprecated. Use JHtmlNumber::bytes() instead.', JLog::WARNING, 'deprecated');
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return JHtml::_('number.bytes', $size);
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}
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public static function imageResize($width, $height, $target)
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{
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//takes the larger size of the width and height and applies the
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//formula accordingly...this is so this script will work
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//dynamically with any size image
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if ($width > $height)
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{
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$percentage = ($target / $width);
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}
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else
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{
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$percentage = ($target / $height);
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}
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//gets the new value and applies the percentage, then rounds the value
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$width = round($width * $percentage);
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$height = round($height * $percentage);
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return array($width, $height);
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}
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public static function countFiles($dir)
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{
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$total_file = 0;
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$total_dir = 0;
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if (is_dir($dir))
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{
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$d = dir($dir);
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while (false !== ($entry = $d->read()))
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{
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if (substr($entry, 0, 1) != '.' && is_file($dir . DIRECTORY_SEPARATOR . $entry) && strpos($entry, '.html') === false && strpos($entry, '.php') === false)
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{
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$total_file++;
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}
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if (substr($entry, 0, 1) != '.' && is_dir($dir . DIRECTORY_SEPARATOR . $entry))
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{
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$total_dir++;
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}
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}
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$d->close();
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}
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return array ($total_file, $total_dir);
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}
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}
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