ruby - 使用 Nokogiri 抓取内容时如何排除嵌套元素？

Question

我有一个页面，内容与此类似:

<div id="level1">
    <div id="level2">
        <div id="level3">Crap i dont care about</div>
        Here is some text i want
        <br />
        Here is some more text i want
        <br />
        Oh i want this text too :)
    </div>
</div>

我的目标是捕获 #level2 中的文本但是 #level3 <div>嵌套在其中与我想要的文本处于同一级别。

是否有可能排除<div> ？我应该修改文档并在解析之前简单地删除元素吗？

Answer 1

require 'nokogiri'

xml = <<-XML
<div id="level1">
    <div id="level2">
        <div id="level3">Crap i dont care about</div>
        Here is some text i want
        <br />
        Here is some more text i want
        <br />
        Oh i want this text too :)
    </div>
</div>
XML

page = Nokogiri::XML(xml)
p page.xpath("//*[@id='level3']").remove.xpath("//*[@id='level2']").inner_text
# => "\n        \n        Here is some text i want\n        \n        Here is some more text i want\n        \n        Oh i want this text too :)\n    "

现在，您可以根据需要清理输出文本。