如何使用XMLStarlet访问Bash中HTML标记的内容

我正在尝试学习如何使用XMLStarlet访问Bash中HTML标记的内容。例如，我正试图访问www.wisdomofchora.com/iframe.php页面中的一些文本。我在为XMLStarlet指定HTML中内容的"地址"时遇到了一些困难，希望能提供一些帮助。我的代码尝试如下：

URL="http://www.wisdomofchopra.com/iframe.php"
webPage="$(curl -s "${URL}")"
echo "${webPage}" | xmlstarlet sel -T -t -c "//html/body//table/tr/td[@id='quote']/header/h2/"

这会产生以下输出：

-:29.12: Opening and ending tag mismatch: meta line 5 and head
    </head>
           ^
-:35.100: Entity 'nbsp' not defined
te"><header><h2>&quot;Emotional intelligence is beyond total reality&quot;&nbsp;
                                                                               ^
-:35.106: Entity 'nbsp' not defined
eader><h2>&quot;Emotional intelligence is beyond total reality&quot;&nbsp;&nbsp;
                                                                               ^
-:41.119: EntityRef: expecting ';'
witter.com/intent/tweet?original_referer=http%3A%2F%2Fwww.wisdomofchopra.com&via
                                                                               ^
-:41.139: EntityRef: expecting ';'
eet?original_referer=http%3A%2F%2Fwww.wisdomofchopra.com&via=WisdomOfChopra&text
                                                                               ^
-:41.196: EntityRef: expecting ';'
via=WisdomOfChopra&text=%27Emotional+intelligence+is+beyond+total+reality%27&url
                                                                               ^
-:52.169: EntityRef: expecting ';'
));document.write(' src="http://ads.adbrite.com/mb/text_group.php?sid=2171164&zs
                                                                               ^
-:52.186: EntityRef: expecting ';'
(' src="http://ads.adbrite.com/mb/text_group.php?sid=2171164&zs=3436385f3630&ifr
                                                                               ^
-:52.209: EntityRef: expecting ';'
ite.com/mb/text_group.php?sid=2171164&zs=3436385f3630&ifr='+AdBrite_Iframe+'&ref
                                                                               ^
-:53.99: EntityRef: expecting ';'
p" href="http://www.adbrite.com/mb/commerce/purchase_form.php?opid=2171164&afsid
                                                                               ^
-:57.9: Opening and ending tag mismatch: head line 3 and html
</html>
       ^
-:58.1: Premature end of data in tag html line 2

编辑：为了方便起见，下面是一些大致等效的网页HTML代码：

<!DOCTYPE html>
<html>
    <head>
    </head>
    <body>
        <h3>Your random fictional Deepak Chopra quote:</h3>
        <table border="0" cellspacing="0" cellpadding="0">
            <tr>
                <td width="128" align="left" valign="top"><img src="img/imageSmall2.png" width="80" height="80" /></td>
                <td id="quote"><header><h2>&quot;Perceptual reality serves total truth&quot;&nbsp;&nbsp;</h2></header></td>
            </tr>
        </table>
    </body>
</html>

我无法让XMLStarlet处理HTML，所以我只使用grep和AWK:

printDeepakChopraAdvice(){
    URL="http://www.wisdomofchopra.com/iframe.php"
    webPage="$(curl -s "${URL}")"
    text="$(echo "${webPage}" | grep "id="quote"" | awk -F"&quot;" '{print $2}')"
    echo "${text}"
}

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