| | |
| | | * Roundcube Changes: |
| | | * - added $block_elements |
| | | * - changed $ignore_elements behaviour |
| | | * - added RFC2397 support |
| | | * - base URL support |
| | | * - invalid HTML comments removal before parsing |
| | | */ |
| | | |
| | | class washtml |
| | | { |
| | | /* Allowed HTML elements (default) */ |
| | | static $html_elements = array('a', 'abbr', 'acronym', 'address', 'area', 'b', 'basefont', 'bdo', 'big', 'blockquote', 'br', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dir', 'div', 'dl', 'dt', 'em', 'fieldset', 'font', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'ins', 'label', 'legend', 'li', 'map', 'menu', 'nobr', 'ol', 'p', 'pre', 'q', 's', 'samp', 'small', 'span', 'strike', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'u', 'ul', 'var', 'wbr', 'img'); |
| | | |
| | | static $html_elements = array('a', 'abbr', 'acronym', 'address', 'area', 'b', |
| | | 'basefont', 'bdo', 'big', 'blockquote', 'br', 'caption', 'center', |
| | | 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dir', 'div', 'dl', |
| | | 'dt', 'em', 'fieldset', 'font', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', |
| | | 'ins', 'label', 'legend', 'li', 'map', 'menu', 'nobr', 'ol', 'p', 'pre', 'q', |
| | | 's', 'samp', 'small', 'span', 'strike', 'strong', 'sub', 'sup', 'table', |
| | | 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'u', 'ul', 'var', 'wbr', 'img', |
| | | // form elements |
| | | 'button', 'input', 'textarea', 'select', 'option', 'optgroup' |
| | | ); |
| | | |
| | | /* Ignore these HTML tags and their content */ |
| | | static $ignore_elements = array('script', 'applet', 'embed', 'object', 'style'); |
| | | |
| | | |
| | | /* Allowed HTML attributes */ |
| | | static $html_attribs = array('name', 'class', 'title', 'alt', 'width', 'height', 'align', 'nowrap', 'col', 'row', 'id', 'rowspan', 'colspan', 'cellspacing', 'cellpadding', 'valign', 'bgcolor', 'color', 'border', 'bordercolorlight', 'bordercolordark', 'face', 'marginwidth', 'marginheight', 'axis', 'border', 'abbr', 'char', 'charoff', 'clear', 'compact', 'coords', 'vspace', 'hspace', 'cellborder', 'size', 'lang', 'dir'); |
| | | static $html_attribs = array('name', 'class', 'title', 'alt', 'width', 'height', |
| | | 'align', 'nowrap', 'col', 'row', 'id', 'rowspan', 'colspan', 'cellspacing', |
| | | 'cellpadding', 'valign', 'bgcolor', 'color', 'border', 'bordercolorlight', |
| | | 'bordercolordark', 'face', 'marginwidth', 'marginheight', 'axis', 'border', |
| | | 'abbr', 'char', 'charoff', 'clear', 'compact', 'coords', 'vspace', 'hspace', |
| | | 'cellborder', 'size', 'lang', 'dir', |
| | | // attributes of form elements |
| | | 'type', 'rows', 'cols', 'disabled', 'readonly', 'checked', 'multiple', 'value' |
| | | ); |
| | | |
| | | /* Block elements which could be empty but cannot be returned in short form (<tag />) */ |
| | | static $block_elements = array('div', 'p', 'pre', 'blockquote'); |
| | | |
| | | static $block_elements = array('div', 'p', 'pre', 'blockquote', 'a', 'font', 'center', |
| | | 'table', 'ul', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'ol', 'dl', 'strong', 'i', 'b', 'u'); |
| | | |
| | | /* State for linked objects in HTML */ |
| | | public $extlinks = false; |
| | | |
| | |
| | | |
| | | /* Registered callback functions for tags */ |
| | | private $handlers = array(); |
| | | |
| | | |
| | | /* Allowed HTML elements */ |
| | | private $_html_elements = array(); |
| | | |
| | |
| | | |
| | | /* Allowed HTML attributes */ |
| | | private $_html_attribs = array(); |
| | | |
| | | |
| | | |
| | | /* Constructor */ |
| | | public function __construct($p = array()) { |
| | |
| | | unset($p['html_elements'], $p['html_attribs'], $p['ignore_elements'], $p['block_elements']); |
| | | $this->config = $p + array('show_washed'=>true, 'allow_remote'=>false, 'cid_map'=>array()); |
| | | } |
| | | |
| | | |
| | | /* Register a callback function for a certain tag */ |
| | | public function add_callback($tagName, $callback) |
| | | { |
| | | $this->handlers[$tagName] = $callback; |
| | | } |
| | | |
| | | |
| | | /* Check CSS style */ |
| | | private function wash_style($style) { |
| | | $s = ''; |
| | | |
| | | foreach(explode(';', $style) as $declaration) { |
| | | if(preg_match('/^\s*([a-z\-]+)\s*:\s*(.*)\s*$/i', $declaration, $match)) { |
| | | foreach (explode(';', $style) as $declaration) { |
| | | if (preg_match('/^\s*([a-z\-]+)\s*:\s*(.*)\s*$/i', $declaration, $match)) { |
| | | $cssid = $match[1]; |
| | | $str = $match[2]; |
| | | $value = ''; |
| | | while(sizeof($str) > 0 && |
| | | while (sizeof($str) > 0 && |
| | | preg_match('/^(url\(\s*[\'"]?([^\'"\)]*)[\'"]?\s*\)'./*1,2*/ |
| | | '|rgb\(\s*[0-9]+\s*,\s*[0-9]+\s*,\s*[0-9]+\s*\)'. |
| | | '|-?[0-9.]+\s*(em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)?'. |
| | | '|#[0-9a-f]{3,6}|[a-z0-9\-]+'. |
| | | '|#[0-9a-f]{3,6}|[a-z0-9", -]+'. |
| | | ')\s*/i', $str, $match)) { |
| | | if($match[2]) { |
| | | if($src = $this->config['cid_map'][$match[2]]) |
| | | $value .= ' url(\''.htmlspecialchars($src, ENT_QUOTES) . '\')'; |
| | | else if(preg_match('/^(http|https|ftp):.*$/i', $match[2], $url)) { |
| | | if($this->config['allow_remote']) |
| | | $value .= ' url(\''.htmlspecialchars($url[0], ENT_QUOTES).'\')'; |
| | | if ($match[2]) { |
| | | if (($src = $this->config['cid_map'][$match[2]]) |
| | | || ($src = $this->config['cid_map'][$this->config['base_url'].$match[2]])) { |
| | | $value .= ' url('.htmlspecialchars($src, ENT_QUOTES) . ')'; |
| | | } |
| | | else if (preg_match('!^(https?:)?//[a-z0-9/._+-]+$!i', $match[2], $url)) { |
| | | if ($this->config['allow_remote']) |
| | | $value .= ' url('.htmlspecialchars($url[0], ENT_QUOTES).')'; |
| | | else |
| | | $this->extlinks = true; |
| | | } |
| | | } else if($match[0] != 'url' && $match[0] != 'rbg')//whitelist ? |
| | | else if (preg_match('/^data:.+/i', $match[2])) { // RFC2397 |
| | | $value .= ' url('.htmlspecialchars($match[2], ENT_QUOTES).')'; |
| | | } |
| | | } |
| | | else if ($match[0] != 'url' && $match[0] != 'rgb') //whitelist ? |
| | | $value .= ' ' . $match[0]; |
| | | |
| | | $str = substr($str, strlen($match[0])); |
| | | } |
| | | if($value) |
| | | if ($value) |
| | | $s .= ($s?' ':'') . $cssid . ':' . $value . ';'; |
| | | } |
| | | } |
| | |
| | | $t = ''; |
| | | $washed; |
| | | |
| | | foreach($node->attributes as $key => $plop) { |
| | | foreach ($node->attributes as $key => $plop) { |
| | | $key = strtolower($key); |
| | | $value = $node->getAttribute($key); |
| | | if(isset($this->_html_attribs[$key]) || |
| | | ($key == 'href' && preg_match('/^(http:|https:|ftp:|mailto:|#).+/i', $value))) |
| | | if (isset($this->_html_attribs[$key]) || |
| | | ($key == 'href' && preg_match('!^(http:|https:|ftp:|mailto:|//|#).+!i', $value))) |
| | | $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"'; |
| | | else if($key == 'style' && ($style = $this->wash_style($value))) |
| | | $t .= ' style="' . $style . '"'; |
| | | else if($key == 'background' || ($key == 'src' && strtolower($node->tagName) == 'img')) { //check tagName anyway |
| | | if($src = $this->config['cid_map'][$value]) { |
| | | else if ($key == 'style' && ($style = $this->wash_style($value))) { |
| | | $quot = strpos($style, '"') !== false ? "'" : '"'; |
| | | $t .= ' style=' . $quot . $style . $quot; |
| | | } |
| | | else if ($key == 'background' || ($key == 'src' && strtolower($node->tagName) == 'img')) { //check tagName anyway |
| | | if (($src = $this->config['cid_map'][$value]) |
| | | || ($src = $this->config['cid_map'][$this->config['base_url'].$value])) { |
| | | $t .= ' ' . $key . '="' . htmlspecialchars($src, ENT_QUOTES) . '"'; |
| | | } |
| | | else if(preg_match('/^(http|https|ftp):.+/i', $value)) { |
| | | if($this->config['allow_remote']) |
| | | else if (preg_match('/^(http|https|ftp):.+/i', $value)) { |
| | | if ($this->config['allow_remote']) |
| | | $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"'; |
| | | else { |
| | | $this->extlinks = true; |
| | | if ($this->config['blocked_src']) |
| | | $t .= ' ' . $key . '="' . htmlspecialchars($this->config['blocked_src'], ENT_QUOTES) . '"'; |
| | | } |
| | | } |
| | | else if (preg_match('/^data:.+/i', $value)) { // RFC2397 |
| | | $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"'; |
| | | } |
| | | } else |
| | | $washed .= ($washed?' ':'') . $key; |
| | |
| | | switch($node->nodeType) { |
| | | case XML_ELEMENT_NODE: //Check element |
| | | $tagName = strtolower($node->tagName); |
| | | if($callback = $this->handlers[$tagName]) { |
| | | $dump .= call_user_func($callback, $tagName, $this->wash_attribs($node), $this->dumpHtml($node)); |
| | | } else if(isset($this->_html_elements[$tagName])) { |
| | | if ($callback = $this->handlers[$tagName]) { |
| | | $dump .= call_user_func($callback, $tagName, $this->wash_attribs($node), $this->dumpHtml($node), $this); |
| | | } |
| | | else if (isset($this->_html_elements[$tagName])) { |
| | | $content = $this->dumpHtml($node); |
| | | $dump .= '<' . $tagName . $this->wash_attribs($node) . |
| | | ($content || isset($this->_block_elements[$tagName]) ? ">$content</$tagName>" : ' />'); |
| | | } else if(isset($this->_ignore_elements[$tagName])) { |
| | | // create closing tag for block elements, but also for elements |
| | | // with content or with some attributes (eg. style, class) (#1486812) |
| | | ($content != '' || $node->hasAttributes() || isset($this->_block_elements[$tagName]) ? ">$content</$tagName>" : ' />'); |
| | | } |
| | | else if (isset($this->_ignore_elements[$tagName])) { |
| | | $dump .= '<!-- ' . htmlspecialchars($tagName, ENT_QUOTES) . ' not allowed -->'; |
| | | } else { |
| | | } |
| | | else { |
| | | $dump .= '<!-- ' . htmlspecialchars($tagName, ENT_QUOTES) . ' ignored -->'; |
| | | $dump .= $this->dumpHtml($node); // ignore tags not its content |
| | | } |
| | | } |
| | | break; |
| | | case XML_CDATA_SECTION_NODE: |
| | | $dump .= $node->nodeValue; |
| | |
| | | |
| | | /* Main function, give it untrusted HTML, tell it if you allow loading |
| | | * remote images and give it a map to convert "cid:" urls. */ |
| | | public function wash($html) { |
| | | //Charset seems to be ignored (probably if defined in the HTML document) |
| | | public function wash($html) |
| | | { |
| | | // Charset seems to be ignored (probably if defined in the HTML document) |
| | | $node = new DOMDocument('1.0', $this->config['charset']); |
| | | $this->extlinks = false; |
| | | |
| | | // Find base URL for images |
| | | if (preg_match('/<base\s+href=[\'"]*([^\'"]+)/is', $html, $matches)) |
| | | $this->config['base_url'] = $matches[1]; |
| | | else |
| | | $this->config['base_url'] = ''; |
| | | |
| | | // Remove invalid HTML comments (#1487759) |
| | | // Don't remove valid conditional comments |
| | | $html = preg_replace('/<!--[^->[\n]*>/', '', $html); |
| | | |
| | | @$node->loadHTML($html); |
| | | return $this->dumpHtml($node); |
| | | } |
| | | |
| | | /** |
| | | * Getter for config parameters |
| | | */ |
| | | public function get_config($prop) |
| | | { |
| | | return $this->config[$prop]; |
| | | } |
| | | |
| | | } |
| | | |
| | | ?> |