如何使Nokogiri透明地返回未编码的Html实体？

Question

我怎样才能使用Nokogiri让html实体(如德语变音符号)不受影响？

即:

# this is fine
node = Nokogiri::HTML.fragment('<p>&ouml;</p>')
node.to_s # => '<p>&ouml;</p>'

# this is not
node = Nokogiri::HTML.fragment('<p>ö</p>')
node.to_s # => '<p>&ouml;</p>'

# this is what I need
node = Nokogiri::HTML.fragment('<p>ö</p>')
node.to_s # => '<p>ö</p>'

我试图弄乱PARSE_OPTIONS和:save_with选项,但无法想出让Nokogiri透明地表现得像上面那样的方法.

有什么指针吗？

Answer 1

好的,我的问题已由Aaron通过twitter/gist回答:

require 'rubygems'
require 'nokogiri'

doc = Nokogiri::HTML::Document.new
doc.encoding = 'UTF-8'

# We added a contextual fragment method for the 1.4.2 release. This *might*
# work in 1.4.1. If you want to mess with 1.4.2, build from my github, or
# grab one of our nightly builds:
#
# $ sudo gem install nokogiri -s http://tenderlovemaking.com/
#
# Also, libxml2 had a bug with encoding when handling UTF-8 fragments, so I
# suggest you also upgrade to libxml2 2.7.7.
#
# Hope that helps!
puts doc.fragment('<p>ö</p>')