/administrator/components/com_media/helpers/media.php
PHP | 184 lines | 128 code | 21 blank | 35 comment | 36 complexity | fa3f42bdbbad5db8e998afa8cbb2b79b MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause, LGPL-2.1, MIT, LGPL-3.0, LGPL-2.0, JSON
- <?php
- /**
- * @copyright Copyright (C) 2005 - 2012 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
- */
- 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(',', $params->get('ignore_extensions'));
- if (!in_array($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;
- }
- }
- }
- $xss_check = JFile::read($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.'>')) {
- $err = 'COM_MEDIA_ERROR_WARNIEXSS';
- return false;
- }
- }
- return true;
- }
- public static function parseSize($size)
- {
- if ($size < 1024) {
- return JText::sprintf('COM_MEDIA_FILESIZE_BYTES', $size);
- }
- elseif ($size < 1024 * 1024) {
- return JText::sprintf('COM_MEDIA_FILESIZE_KILOBYTES', sprintf('%01.2f', $size / 1024.0));
- }
- else {
- return JText::sprintf('COM_MEDIA_FILESIZE_MEGABYTES', sprintf('%01.2f', $size / (1024.0 * 1024)));
- }
- }
- public static function imageResize($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);
- }
- }