符合HTML5的HTML过滤器

Question

是否有一种简单的方法来为HTMLPurifier添加HTML5规则集？

可以将HP 配置为识别新标签:

// setup configurable HP instance
$config = HTMLPurifier_Config::createDefault();
$config->set('HTML.DefinitionID', 'html5 draft');
$config->set('HTML.DefinitionRev', 1);
$config->set('Cache.DefinitionImpl', null); // no caching
$def = $config->getHTMLDefinition(true);

// add a new tag
$form = $def->addElement(
  'article',   // name
  'Block',     // content set
  'Flow',      // allowed children
  'Common',    // attribute collection
  array(       // attributes
  )
);

// add a new attribute
$def->addAttribute('a', 'contextmenu', "ID");

然而,这显然有点工作.由于必须注册许多新的HTML5标签和属性.即使使用现有的HTML 4标记,新的全局属性也应该是可组合的.(从文档中判断如何增加核心规则很难判断).那么,是否有更有用的配置格式/数组结构将新的和更新的标记+属性+上下文配置(内联/块/空/流/ ...)提供给HTMLPurifier？

# mostly confused about how to extend existing tags:
$def->addAttribute('input', 'type', "...|...|...");

# or how to allow data-* attributes (if I actually wanted that):
$def->addAttribute("data-*", ...

当然,并非所有新的HTML5标签都适合不受限制的限额.HTMLPurifier就是内容过滤.定义价值约束就是它所处的位置.- <canvas>例如,当它出现在用户内容中时可能不是那么大的交易.因为没有Javascript(惠普已经过滤掉了),它最多也没用.但其他标签和属性可能是不受欢迎的; 因此,灵活的配置结构对于启用/禁用标签及其相关属性是必不可少的.

(猜猜我应该更新一些研究......).但是仍然没有适合HP配置的实用纲要/规范(不,XML DTD不是).

• http://simon.html5.org/html-elements
• http://www.w3.org/TR/html5-diff/#new-elements
• http://www.w3.org/TR/html5-diff/#new-attributes

(呃,HTML5不再是草稿了.)

Answer 1

php tidy扩展可以配置为识别html5标签. http://tidy.sourceforge.net/docs/quickref.html#new-blocklevel-tags

Answer 2

HTMLpurify的这种配置允许更新的HTML5标签.

资料来源:https://github.com/kennberg/php-htmlpurfier-html5

.

<?php
/**
 * Load HTMLPurifier with HTML5, TinyMCE, YouTube, Video support.
 *
 * Copyright 2014 Alex Kennberg (https://github.com/kennberg/php-htmlpurifier-html5)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

require_once(LIB_DIR . 'third-party/htmlpurifier/HTMLPurifier.safe-includes.php');


function load_htmlpurifier($allowed) {
  $config = HTMLPurifier_Config::createDefault();
  $config->set('HTML.Doctype', 'HTML 4.01 Transitional');
  $config->set('CSS.AllowTricky', true);
  $config->set('Cache.SerializerPath', '/tmp');

  // Allow iframes from:
  // o YouTube.com
  // o Vimeo.com
  $config->set('HTML.SafeIframe', true);
  $config->set('URI.SafeIframeRegexp', '%^(http:|https:)?//(www.youtube(?:-nocookie)?.com/embed/|player.vimeo.com/video/)%');

  $config->set('HTML.Allowed', implode(',', $allowed));

  // Set some HTML5 properties
  $config->set('HTML.DefinitionID', 'html5-definitions'); // unqiue id
  $config->set('HTML.DefinitionRev', 1);

  if ($def = $config->maybeGetRawHTMLDefinition()) {
    // http://developers.whatwg.org/sections.html
    $def->addElement('section', 'Block', 'Flow', 'Common');
    $def->addElement('nav',     'Block', 'Flow', 'Common');
    $def->addElement('article', 'Block', 'Flow', 'Common');
    $def->addElement('aside',   'Block', 'Flow', 'Common');
    $def->addElement('header',  'Block', 'Flow', 'Common');
    $def->addElement('footer',  'Block', 'Flow', 'Common');

    // Content model actually excludes several tags, not modelled here
    $def->addElement('address', 'Block', 'Flow', 'Common');
    $def->addElement('hgroup', 'Block', 'Required: h1 | h2 | h3 | h4 | h5 | h6', 'Common');

    // http://developers.whatwg.org/grouping-content.html
    $def->addElement('figure', 'Block', 'Optional: (figcaption, Flow) | (Flow, figcaption) | Flow', 'Common');
    $def->addElement('figcaption', 'Inline', 'Flow', 'Common');

    // http://developers.whatwg.org/the-video-element.html#the-video-element
    $def->addElement('video', 'Block', 'Optional: (source, Flow) | (Flow, source) | Flow', 'Common', array(
      'src' => 'URI',
      'type' => 'Text',
      'width' => 'Length',
      'height' => 'Length',
      'poster' => 'URI',
      'preload' => 'Enum#auto,metadata,none',
      'controls' => 'Bool',
    ));
    $def->addElement('source', 'Block', 'Flow', 'Common', array(
      'src' => 'URI',
      'type' => 'Text',
    ));

    // http://developers.whatwg.org/text-level-semantics.html
    $def->addElement('s',    'Inline', 'Inline', 'Common');
    $def->addElement('var',  'Inline', 'Inline', 'Common');
    $def->addElement('sub',  'Inline', 'Inline', 'Common');
    $def->addElement('sup',  'Inline', 'Inline', 'Common');
    $def->addElement('mark', 'Inline', 'Inline', 'Common');
    $def->addElement('wbr',  'Inline', 'Empty', 'Core');

    // http://developers.whatwg.org/edits.html
    $def->addElement('ins', 'Block', 'Flow', 'Common', array('cite' => 'URI', 'datetime' => 'CDATA'));
    $def->addElement('del', 'Block', 'Flow', 'Common', array('cite' => 'URI', 'datetime' => 'CDATA'));

    // TinyMCE
    $def->addAttribute('img', 'data-mce-src', 'Text');
    $def->addAttribute('img', 'data-mce-json', 'Text');

    // Others
    $def->addAttribute('iframe', 'allowfullscreen', 'Bool');
    $def->addAttribute('table', 'height', 'Text');
    $def->addAttribute('td', 'border', 'Text');
    $def->addAttribute('th', 'border', 'Text');
    $def->addAttribute('tr', 'width', 'Text');
    $def->addAttribute('tr', 'height', 'Text');
    $def->addAttribute('tr', 'border', 'Text');
  }

  return new HTMLPurifier($config);
}