set('Core.Encoding', 'UTF-8');
$config->set('CSS.AllowTricky', true);
$config->set('Attr.EnableID', true); // 允许id
$config->set('HTML.Trusted', true); // 影响iframe过滤;
$config->set('Cache.SerializerPath', TEMP_PATH);// 缓存目录;
$config->set('Cache.DefinitionImpl', null);
// $config->set('HTML.SafeIframe',true);// iframe包含页面白名单;
// $config->set('URI.SafeIframeRegexp', '%^https://(*)%');
// 设置保留的标签
$config->set('HTML.Allowed','*[id|style|class|title|type|border|width|height|alt|data|data-exp|contenteditable|aria-hidden],div,b,strong,i,em,a[href],ul,ol,ol[start],li,p,br,span,img[src],pre,hr,code,h1,h2,h3,h4,h5,h6,blockquote,del,table,thead,tbody,tr,th,td,s,sub,sup,wbr,nav,article,aside,header,footer,ins,del,address,hgrop,figure,figcaption,video[src|controls|posterh],source[src],iframe[frameborder|src|allowfullscreen|scrolling]');
// 不限制css的key;
// $config->set('CSS.AllowedProperties','font,font-size,font-weight,font-style,font-family,margin,width,height,text-decoration,padding-left,padding-top,padding-right,padding-top,padding-bottom,line-height,color,background-color,text-align,border-collapse,list-style-type,list-style');
$config->set('HTML.TargetBlank', TRUE);
$cleanObj = new HTMLPurifier($config);
return $cleanObj->purify($data);
}
public static function onlyImage($data){
require_once SDK_DIR.'HtmlPurifier/HTMLPurifier.auto.php';
$config = HTMLPurifier_Config::createDefault();
$config->set('Cache.SerializerPath', TEMP_PATH);// 缓存目录;
$config->set('Cache.DefinitionImpl', null);
$config->set('HTML.Allowed','img[src|alt]');
$cleanObj = new HTMLPurifier($config);
return $cleanObj->purify($data);
}
public static function clearSVG($content){
return self::removeXXS($content);
}
// 正则替换掉onload,等属性; style无法保留
public static function removeXXS($val){
// remove all non-printable characters. CR(0a) and LF(0b) and TAB(9) are allowed
// this prevents some character re-spacing such as
// note that you have to handle splits with \n, \r, and \t later since they *are* allowed in some inputs
$val = preg_replace('/([\x00-\x08\x0b-\x0c\x0e-\x19])/', '', $val);// 去除逗号;
// straight replacements, the user should never need these since they're normal characters
// this prevents like )
$search = 'abcdefghijklmnopqrstuvwxyz';
$search .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$search .= '1234567890!@#$%^&*()';
$search .= '~`";:?+/={}[]-_|\'\\';
for ($i = 0; $i < strlen($search); $i++) {
// ;? matches the ;, which is optional
// 0{0,7} matches any padded zeros, which are optional and go up to 8 chars
// @ @ search for the hex values
$val = preg_replace('/(&#[xX]0{0,8}' . dechex(ord($search[$i])) . ';?)/i', $search[$i], $val); // with a ;
// @ @ 0{0,7} matches '0' zero to seven times
$val = preg_replace('/(�{0,8}' . ord($search[$i]) . ';?)/', $search[$i], $val); // with a ;
}
// now the only remaining whitespace attacks are \t, \n, and \r
$ra1 = array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'style', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');
$ra1 = array('javascript', 'vbscript', 'expression','script');// 过多,误判
$ra2 = array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload');
$ra = array_merge($ra1, $ra2);
$found = true; // keep replacing as long as the previous round replaced something
while ($found == true) {
$val_before = $val;
for ($i = 0; $i < sizeof($ra); $i++) {
$pattern = '/';
for ($j = 0; $j < strlen($ra[$i]); $j++) {
if ($j > 0) {
$pattern .= '(';
$pattern .= '(&#[xX]0{0,8}([9ab]);)';
$pattern .= '|';
$pattern .= '|(�{0,8}([9|10|13]);)';
$pattern .= ')*';
}
$pattern .= $ra[$i][$j];
}
$pattern .= '/i';
$replacement = substr($ra[$i], 0, 2) . '_' . substr($ra[$i], 2); // add in <> to nerf the tag
$val = preg_replace($pattern, $replacement, $val); // filter out the hex tags
if ($val_before == $val) {
// no replacements were made, so exit the loop
$found = false;
}
}
}
return $val;
}
}