Question

我和nokogiri有问题。假设我有这个HTML

<html> 
<p>
        This is just an example, how to remove the next sentence using nokogiri in Ruby.
        Thank you for your help.
        <strong> XXXX </strong>
            <br/> 
            <br />
        I want to remove all the HTML after the strong XXXX
            <br />
            <br />
        <strong> YYY </strong>
</p>

我怎样才能获得"This is just an example, how to remove the next sentence using nokogiri ... Thank you for your help."？我不希望将<strong> XXXX中的HTML包含在其余部分中。

Answer 1

要明确排除，您可能需要尝试

doc.search('//p/text()[not(preceding-sibling::strong)]').text

这表示所有文本节点都不在strong之后。

根据您的输入，这将提取以下内容：

        This is just an example, how to remove the next sentence using nokogiri in Ruby.
        Thank you for your help.

Answer 2

如果您只是想获取文本（这是我认为您要问的那样），那么您可以在Nokogiri元素上调用text方法。这将返回给你“...感谢您的帮助XXX我希望在强大的XXXX YYY之后删除所有HTML”。这是Nokogiri documentation的链接，如果这有用的话 - 它会讨论文本方法。或者你是在谈论试图在标签后没有得到任何text / html？

Answer 3

希望您正在寻找以下内容：

require 'nokogiri'

doc = Nokogiri::HTML::Document.parse <<-_HTML_
<p>
        This is just an example, how to remove the next sentence using nokogiri in Ruby.
        Thank you for your help.
        <strong> XXXX </strong>
            <br/> 
            <br />
        I want to remove all the HTML after the strong XXXX
            <br />
            <br />
        <strong> YYY </strong>
</p>
_HTML_

puts doc.at('//p/text()[1]').to_s.strip
# >> This is just an example, how to remove the next sentence using nokogiri in Ruby.
# >>         Thank you for your help.

现在，如果您想根据源html本身删除不需要的html内容，那么您可以尝试以下内容：

require 'nokogiri'

doc = Nokogiri::HTML::Document.parse <<-_HTML_
<p>
        This is just an example, how to remove the next sentence using nokogiri in Ruby.
        Thank you for your help.
        <strong> XXXX </strong>
            <br/> 
            <br />
        I want to remove all the HTML after the strong XXXX
            <br />
            <br />
        <strong> YYY </strong>
</p>
_HTML_


doc.xpath('//p/* | //p/text()').count # => 10
ndst = doc.search('//p/* | //p/text()')[1..-1]
ndst.remove


puts doc.to_html
# >> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
# >> <html><body><p>
# >>         This is just an example, how to remove the next sentence using nokogiri in Ruby.
# >>         Thank you for your help.
# >>         </p></body></html>

Nokogiri，如何删除不必要的HTML内容？

3 个答案: