I have the following HTML code:
1</script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5408099190056760" data-ad-slot="7305827575" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <div class="relativetags"> 相关标签: </div> </div> <div class="fly-panel detail-box" id="flyReply"> <fieldset class="layui-elem-field layui-field-title" style="text-align: center;"> <legend>4条回答</legend> </fieldset> <ul class="jieda" id="jieda"> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-67.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000067.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-67.html" class="fly-link"> <cite>天命终不由人 </cite> </a> </div> <div class="detail-hits"> <span>2021-01-02 01:39</span> </div> </div> <div class="detail-body jieda-body photos"> <p>Hello from the year 2020!</p> <p>As of v2.9.9 of libxml, this behavior has been fixed in xmllint itself.</p> <p>However, if you're using anything older than that, and don't want to build libxml from source just to get the fixed <code>xmllint</code>, you'll need one of the other workarounds here. As of this writing, the latest CentOS 8, for example, is still using a version of libxml (2.9.7) that behaves the way the OP describes.</p> <p>As I gather from this SO answer, it's theoretically possible to feed a command into the <code>--shell</code> option of older (<2.9.9) versions of <code>xmllint</code>, and this will produce each node on a separate line. However, you end up having to post-process it with <code>sed</code> or <code>grep</code> to remove the visual detritus of shell mode's (human-oriented) output. It's not ideal.</p> <hr> <p>XMLStarlet, if available, offers another solution, but you do need to use <code>xmlstarlet fo</code> to format your HTML fragment into valid XML before using <code>xmlstarlet sel</code> to extract nodes:</p> <pre><code>echo ' <textarea name="command" class="setting-input fixed-width" rows="9">1</textarea> <textarea name="command" class="setting-input fixed-width" rows="5">2</textarea>' \ | xmlstarlet fo -H -R \ | xmlstarlet sel -T -t -v '//textarea[@name="command"]' -n </code></pre> <p>If the <code>Attempt to load network entity</code> message from the second <code>xmlstarlet</code> invocation annoys you, just add <code>2>/dev/null</code> at the very end to suppress it (at the risk of suppressing other messages printed to standard error).</p> <p>The XMLStarlet options explained (see also the user's guide):</p> <ul> <li><code>fo -H -R</code> — <strong>fo</strong>rmat the output, expecting HTML input, and recovering as much bad input as possible <ul> <li>this will add an <code><html></code> root node, making the fragment in the OP's example valid XML</li> </ul></li> <li><code>sel -T -t -v //xpath -n</code> — <strong>sel</strong>ect nodes based on XPath <code>//xpath</code> <ul> <li>output plain text (<code>-T</code>) instead of XML</li> <li>using the given template (<code>-t</code>) that returns the value (<code>-v</code>) of the node rather than the node itself (allowing you to forgo using <code>text()</code> in the XPath expression)</li> <li>finally, add a newline (<code>-n</code>)</li> </ul></li> </ul> <p><strong>Edit(s)</strong>: Removed half-implemented <code>xmllint --shell</code> solution because it was just bad. Added an XMLStarlet example that actually works with the OP's data.</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1555364'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1555364"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_1555364"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1555364">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-66.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000066.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-66.html" class="fly-link"> <cite>夕颜 </cite> </a> </div> <div class="detail-hits"> <span>2021-01-02 01:48</span> </div> </div> <div class="detail-body jieda-body photos"> <p>I did the following, ugly trick, please feel free to provide a better solution.</p> <p>Changed the HTML code by replacing <code></textarea></code> with <code>\n</textarea></code> using the following command:</p> <pre><code>sed 's/\<\/textarea/\'$'\n\<\\/textarea/g' f </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1555366'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1555366"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_1555366"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1555366">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-93.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000093.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-93.html" class="fly-link"> <cite>灰色年华 </cite> </a> </div> <div class="detail-hits"> <span>2021-01-02 01:53</span> </div> </div> <div class="detail-body jieda-body photos"> <p>This is a wrapper script intended exactly to the purpose of newlines delimited output (for old releases of <code>xmllint</code>):</p> <pre><code>#!/bin/bash # wrapper script to # - have newline delimited output on Xpath querys # - implements --xpath on very old releases /usr/bin/xmllint --xpath &>/dev/null implements_xpath=$? newlines_delimited_xmllint_version=20909 current_version=$(xmllint --version |& awk 'NR==1{print $NF;exit}') args=( "$@" ) if [[ $@ == *--xpath* ]]; then # iterate over positional parameters for ((i=0; i<${#args}; i++)); do if [[ ${args[i]} == --xpath ]]; then xpath="${args[i+1]}" unset args[i+1] unset args[i] break fi done if [[ ($implements_xpath==0 && $current_version>=20909) || $file == - || $file == /dev/stdin || $xpath == / || $xpath == string\(* ]] then exec /usr/bin/xmllint "$@" else exec /usr/bin/xmllint "${args[@]}" --shell <<< "cat $xpath" | sed '1d;$d;s/^ ------- *$//;/^$/d' fi else exec /usr/bin/xmllint "$@" fi </code></pre> <p>Check latest revision: https://github.com/sputnick-dev/xmllint</p> <p>Debian Buster in June 29 2020 have version 2.9.4 which is 4 years old.<br /> Debian testing/experimental have 2.9.10, which is the fixed version.</p> <p>Another way to install 2.9.10 with Debian last stable: https://serverfault.com/a/1022826/120473 (without taking the risk of crashing the <code>apt</code> system)</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1555367'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1555367"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_1555367"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1555367">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-115.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/01/small_000000115.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-115.html" class="fly-link"> <cite>时光说笑 </cite> </a> </div> <div class="detail-hits"> <span>2021-01-02 01:57</span> </div> </div> <div class="detail-body jieda-body photos"> <p>Try this patch, which provides 2 options:</p> <ul> <li><p><code>--xpath</code>: same as old <code>--xpath</code>, with nodes separated by <code>\n</code>.</p></li> <li><p><code>--xpath0</code>: same as old <code>--xpath</code>, with nodes separated by <code>\0</code>.</p></li> </ul> <p>Test input (<code>a.html</code>):</p> <pre><code><textarea name="command" class="setting-input fixed-width" rows="9">1</textarea><textarea name="command" class="setting-input fixed-width" rows="5">2</textarea> </code></pre> <p>Test command 1:</p> <pre><code># xmllint --xpath '//textarea[@name="command"]/text()' --html a.html </code></pre> <p>Test output 1:</p> <pre><code> 1 2 </code></pre> <p>Test command 2:</p> <pre><code># xmllint --xpath0 '//textarea[@name="command"]/text()' --html a.html | xargs -0 -n1 </code></pre> <p>Test output 2:</p> <pre><code> 1 2 </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1555365'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1555365"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_1555365"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1555365">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <style> .laypage-main a, .laypage-main span { display: inline-block; } </style> </ul> <div class="layui-form layui-form-pane"> <form id="huidaform" name="answerForm" method="post"> <div class="layui-form-item layui-form-text"> <a name="comment"></a> <div class="layui-input-block"> <script type="text/javascript" src="https://www.e-learn.cn/qa/static/js/neweditor/ueditor.config.js"></script> <script type="text/javascript" src="https://www.e-learn.cn/qa/static/js/neweditor/ueditor.all.js"></script> <script type="text/plain" id="editor" name="content" style="width:100%;height:200px;"></script> <script type="text/javascript"> var isueditor=1; 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