/**
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* Copyright (c) 2015-2016, Michael Yang 杨福海 (fuhai999@gmail.com).
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*
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* Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.gnu.org/licenses/lgpl-3.0.txt
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.landtool.lanbase.common.utils;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.commons.lang.StringUtils;
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import org.jsoup.Jsoup;
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import org.jsoup.nodes.Attribute;
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import org.jsoup.nodes.Document;
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import org.jsoup.nodes.Element;
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import org.jsoup.select.Elements;
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/**
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* @author lanbase
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* @Description: TODO(html处理工具)
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* @date 2017-6-23 15:07
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*/
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public class JsoupUtils {
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public static String getFirstImageSrc(String html) {
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if (html == null)
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return null;
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Elements es = Jsoup.parseBodyFragment(html).select("img");
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if (es != null && es.size() > 0)
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return es.first().attr("src");
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return null;
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}
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public static List<String> getImageSrcs(String html) {
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if (StringUtils.isBlank(html)) {
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return null;
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}
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List<String> list = new ArrayList<String>();
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Document doc = Jsoup.parseBodyFragment(html);
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Elements es = doc.select("img");
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if (es != null && es.size() > 0) {
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for (Element e : es) {
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list.add(e.attr("src"));
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}
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}
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return list;
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}
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public static String getText(String html) {
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return Jsoup.parse(html).text();
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}
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public static String getBodyHtml(String html) {
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if (StringUtils.isNotBlank(html)) {
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Document document = Jsoup.parse(html);
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if (null != document && document.body() != null) {
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return document.body().html().toString();
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}
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}
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return html;
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}
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static MyWhitelist whitelist = new MyWhitelist();
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public static String clear(String html) {
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if (StringUtils.isNotBlank(html))
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return Jsoup.clean(html, whitelist);
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return html;
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}
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/**
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* 做自己的白名单，允许base64的图片通过等
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*
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* @author michael
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*/
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public static class MyWhitelist extends org.jsoup.safety.Whitelist {
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public MyWhitelist() {
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addTags("a", "b", "blockquote", "br", "caption", "cite", "code", "col", "colgroup", "dd", "div", "dl", "dt",
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"em", "h1", "h2", "h3", "h4", "h5", "h6", "i", "img", "li", "ol", "p", "pre", "q", "small",
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"strike", "strong", "sub", "sup", "table", "tbody", "td", "tfoot", "th", "thead", "tr", "u", "ul");
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addAttributes("a", "href", "title", "target");
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addAttributes("blockquote", "cite");
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addAttributes("col", "span");
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addAttributes("colgroup", "span");
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addAttributes("img", "align", "alt", "src", "title");
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addAttributes("ol", "start");
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addAttributes("q", "cite");
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addAttributes("table", "summary");
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addAttributes("td", "abbr", "axis", "colspan", "rowspan", "width");
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addAttributes("th", "abbr", "axis", "colspan", "rowspan", "scope", "width");
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addAttributes("video", "src", "autoplay", "controls", "loop", "muted", "poster", "preload");
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addAttributes(":all", "class");
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addAttributes(":all", "style");
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addAttributes(":all", "height");
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addAttributes(":all", "width");
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addAttributes(":all", "type");
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addAttributes(":all", "id");
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addAttributes(":all", "name");
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addProtocols("a", "href", "ftp", "http", "https", "mailto", "tel");
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addProtocols("blockquote", "cite", "http", "https");
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addProtocols("cite", "cite", "http", "https");
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addProtocols("img", "src", "http", "https");
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addProtocols("q", "cite", "http", "https");
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}
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@Override
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protected boolean isSafeAttribute(String tagName, Element el, Attribute attr) {
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return ("img".equals(tagName) && "src".equals(attr.getKey()) && attr.getValue().startsWith("data:;base64"))
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|| super.isSafeAttribute(tagName, el, attr);
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}
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}
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}
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