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<?php |
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/* Copyright (C) NAVER <http://www.navercorp.com> */ |
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class Purifier |
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{ |
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private $_cacheDir; |
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private $_htmlPurifier; |
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private $_config; |
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private $_def; |
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public function Purifier() |
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{ |
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$this->_checkCacheDir(); |
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// purifier setting |
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require_once _XE_PATH_ . 'classes/security/htmlpurifier/library/HTMLPurifier.auto.php'; |
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require_once 'HTMLPurifier.func.php'; |
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$this->_setConfig(); |
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} |
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public function getInstance() |
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{ |
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if(!isset($GLOBALS['__PURIFIER_INSTANCE__'])) |
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{ |
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$GLOBALS['__PURIFIER_INSTANCE__'] = new Purifier(); |
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} |
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return $GLOBALS['__PURIFIER_INSTANCE__']; |
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} |
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private function _setConfig() |
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{ |
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$whiteDomainRegex = $this->_getWhiteDomainRegx(); |
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//$allowdClasses = array('emoticon'); |
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$this->_config = HTMLPurifier_Config::createDefault(); |
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$this->_config->autoFinalize = false; |
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$this->_config->set('HTML.TidyLevel', 'light'); |
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$this->_config->set('Output.FlashCompat', TRUE); |
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$this->_config->set('HTML.SafeObject', TRUE); |
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$this->_config->set('HTML.SafeEmbed', TRUE); |
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$this->_config->set('HTML.SafeIframe', TRUE); |
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$this->_config->set('URI.SafeIframeRegexp', $whiteDomainRegex); |
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$this->_config->set('Cache.SerializerPath', $this->_cacheDir); |
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$this->_config->set('Attr.AllowedFrameTargets', array('_blank')); |
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// @see https://github.com/xpressengine/xe-core/issues/2138 |
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$this->_config->set('Attr.IDPrefix', 'user_content_'); |
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$this->_def = $this->_config->getHTMLDefinition(TRUE); |
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$this->_def->addAttribute('iframe', 'allowfullscreen', 'Text'); |
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} |
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public function setConfig($name, $value) |
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{ |
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if($this->_config->isFinalized()) return; |
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$this->_config->set($name, $value); |
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} |
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private function _setDefinition(&$content) |
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{ |
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// add attribute for edit component |
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$editComponentAttrs = $this->_searchEditComponent($content); |
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if(is_array($editComponentAttrs)) |
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{ |
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foreach($editComponentAttrs AS $k => $v) |
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{ |
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$this->_def->addAttribute('img', $v, 'CDATA'); |
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$this->_def->addAttribute('div', $v, 'CDATA'); |
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} |
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} |
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// add attribute for widget component |
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$widgetAttrs = $this->_searchWidget($content); |
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if(is_array($widgetAttrs)) |
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{ |
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foreach($widgetAttrs AS $k => $v) |
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{ |
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$this->_def->addAttribute('img', $v, 'CDATA'); |
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} |
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} |
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} |
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/** |
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* Search attribute of edit component tag |
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* @param string $content |
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* @return array |
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*/ |
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private function _searchEditComponent($content) |
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{ |
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preg_match_all('!<(?:(div)|img)([^>]*)editor_component=([^>]*)>(?(1)(.*?)</div>)!is', $content, $m); |
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$attributeList = array(); |
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if(is_array($m[2])) |
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{ |
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foreach($m[2] as $key => $value) |
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{ |
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unset($script, $m2); |
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$script = " {$m[2][$key]} editor_component={$m[3][$key]}"; |
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View Code Duplication |
if(preg_match_all('/([a-z0-9_-]+)="([^"]+)"/is', $script, $m2)) |
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{ |
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foreach($m2[1] as $value2) |
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{ |
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//SECISSUE check style attr |
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if($value2 == 'style') |
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{ |
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continue; |
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} |
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$attributeList[] = $value2; |
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} |
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} |
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} |
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} |
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return array_unique($attributeList); |
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} |
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/** |
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* Search edit component tag |
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* @param string $content |
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* @return array |
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*/ |
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private function _searchWidget(&$content) |
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{ |
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preg_match_all('!<(?:(div)|img)([^>]*)class="zbxe_widget_output"([^>]*)>(?(1)(.*?)</div>)!is', $content, $m); |
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$attributeList = array(); |
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if(is_array($m[3])) |
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{ |
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$content = str_replace('<img class="zbxe_widget_output"', '<img src="" class="zbxe_widget_output"', $content); |
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foreach($m[3] as $key => $value) |
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{ |
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View Code Duplication |
if (preg_match_all('/([a-z0-9_-]+)="([^"]+)"/is', $m[3][$key], $m2)) |
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{ |
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foreach($m2[1] as $value2) |
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{ |
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//SECISSUE check style attr |
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if($value2 == 'style') |
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{ |
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continue; |
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} |
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$attributeList[] = $value2; |
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} |
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} |
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} |
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} |
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return array_unique($attributeList); |
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} |
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private function _getWhiteDomainRegx() |
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{ |
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$oEmbedFilter = EmbedFilter::getInstance(); |
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$whiteIframeUrlList = $oEmbedFilter->getWhiteIframeUrlList(); |
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$whiteDomain = array(); |
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foreach($whiteIframeUrlList as $value) |
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{ |
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$whiteDomain[] = preg_quote($value, '%'); |
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} |
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$whiteDomainRegex = '%^(' . implode('|', $whiteDomain) . ')%'; |
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return $whiteDomainRegex; |
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} |
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private function _checkCacheDir() |
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{ |
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// check htmlpurifier cache directory |
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$this->_cacheDir = _XE_PATH_ . 'files/cache/htmlpurifier'; |
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FileHandler::makeDir($this->_cacheDir); |
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} |
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public function purify(&$content) |
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{ |
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$this->_setDefinition($content); |
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$this->_htmlPurifier = new HTMLPurifier($this->_config); |
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$content = $this->_htmlPurifier->purify($content); |
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} |
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} |
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/* End of file : Purifier.class.php */ |
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/* Location: ./classes/security/Purifier.class.php */ |
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xpressengine /
xe-core
