将转义的XML实体转换回UTF-8 [英] Converting escaped XML entities back into UTF-8

问题描述

所以我有一个XML文件中的UTF-8字符串：

So I've got this UTF-8 string in an XML file:

Horrible place. ☠☠☠

当我将它提供给一个外部应用程序时，有趣的角色回来转义为XML实体：

And when I feed it to an external application, the funny characters come back escaped as XML entities:

Horrible place. ☠☠☠

在Ruby中，如何将该字符串转换回UTF-8？这可能是一个非常简单的解决方案，但我无法在标准库中找到任何东西;例如。 CGI.unescapeHTML （它非常适合于& gt; 等）似乎完全忽略它们。 >

In Ruby, how do I convert that string back to UTF-8? There's probably a really easy solution for this, but I'm unable to find anything in the standard libraries; eg. CGI.unescapeHTML (which work nicely for things like >) seem to ignore them completely.

ree-1.8.7-2010.02 > CGI.unescapeHTML('>')
 => ">" 
ree-1.8.7-2010.02 > CGI.unescapeHTML('☠')
 => "☠" 

推荐答案

嗯，由于是XML编码，我会去一个XML解析器：

Well, since it's XML encoded I'd go for an XML parser:

require 'nokogiri'

frag = 'Horrible place. ☠☠☠'
doc = Nokogiri::XML.fragment(frag)
puts doc.text
# >> Horrible place. ☠☠☠

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