如何使用Nokogiri :: XML :: Builder将非转义的&符号添加到HTML [英] How to add non-escaped ampersands to HTML with Nokogiri::XML::Builder

问题描述

我想在Nokogiri中使用XML Builder添加诸如项目符号•的HTML，但是一切正在被转义。如何防止它被转义？

I would like to add things like bullet points "•" to HTML using the XML Builder in Nokogiri, but everything is being escaped. How do I prevent it from being escaped?

我希望结果是：

<span>&#8226;</span> 

而不是：

<span>&amp;#8226;</span> 

我只是这样做：

xml.span { 
  xml.text "•\ " 
}

我缺少什么？

推荐答案

如果您定义

  class Nokogiri::XML::Builder
    def entity(code)
      doc = Nokogiri::XML("<?xml version='1.0'?><root>&##{code};</root>")
      insert(doc.root.children.first)
    end
  end

然后这个

  builder = Nokogiri::XML::Builder.new do |xml|
    xml.span {
      xml.text "I can has "
      xml.entity 8665
      xml.text " entity?"
    }
  end
  puts builder.to_xml

p>

yields

<?xml version="1.0"?>
<span>I can has &#x2022; entity?</span>

 

PS 这是一个解决方法，对于一个干净的解决方案，请参考 libxml2 文档（Nokogiri是建立在libxml2上）以获得更多帮助。然而，即使这些人承认处理实体可能相当..，有时候繁琐。

PS this a workaround only, for a clean solution please refer to the libxml2 documentation (Nokogiri is built on libxml2) for more help. However, even these folks admit that handling entities can be quite ..err, cumbersome sometimes.

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