<?php /** * TSafeHtml class file * * @author Wei Zhuo <weizhuo[at]gmail[dot]com> * @link http://www.pradosoft.com/ * @copyright Copyright © 2005 PradoSoft * @license http://www.pradosoft.com/license/ * @version $Revision: $ $Date: $ * @package System.Web.UI.WebControls */ /** * TSafeHtml class * * TSafeHtml is a control that strips down all potentially dangerous * HTML content. It is mainly a wrapper of {@link http://pixel-apes.com/safehtml/ SafeHTML} * project. According to the SafeHTML project, it tries to safeguard * the following situations when the string is to be displayed to end-users, * - Opening tag without its closing tag * - closing tag without its opening tag * - any of these tags: base, basefont, head, html, body, applet, object, * iframe, frame, frameset, script, layer, ilayer, embed, bgsound, link, * meta, style, title, blink, xml, etc. * - any of these attributes: on*, data*, dynsrc * - javascript:/vbscript:/about: etc. protocols * - expression/behavior etc. in styles * - any other active content. * * To use TSafeHtml, simply enclose the content to be secured within * the body of TSafeHtml in a template. * * @author Wei Zhuo <weizhuo[at]gmail[dot]com> * @version $Revision: $ $Date: $ * @package System.Web.UI.WebControls * @since 3.0 */ class TSafeHtml extends TControl { /** * Renders body content. * This method overrides parent implementation by removing * malicious javascript code from the body content * @param THtmlWriter writer */ public function render($writer) { $textWriter=new TTextWriter; parent::render(new THtmlWriter($textWriter)); $writer->write($this->parseSafeHtml($textWriter->flush())); } /** * Use SafeHTML to remove malicous javascript from the HTML content. * @param string HTML content * @return string safer HTML content */ protected function parseSafeHtml($text) { $renderer = Prado::createComponent('System.3rdParty.SafeHtml.TSafeHtmlParser'); return $renderer->parse($text); } } ?>