递归地将包含非UTF字符的散列转换为UTF [英] recursively convert hash containing non-UTF chars to UTF

问题描述

我有一个流氓宝石（omniauth），它提供了一个包含ASCII-BIT8字符串的数据的散列表，我想将它转换为UTF。

I have a rogue gem (omniauth) which provides a hash of data containing ASCII-BIT8 strings that I would like to convert into UTF.

如何强制将所有的哈希字符串元素转换为UTF，作为某种类型的rails初始化方法？ .to_utf8

How can I force all of the string elements of the hash into UTF, as some kind of rails initializer method? .to_utf8

session[:omniauth] = omniauth.to_utf8

class Hash
  def to_utf8
    #not really sure what to do here?
  end
end

推荐答案

Ruby 1.9通常只需使用 encode 方法翻转编码。与 symbolize_keys 不同的是，这是一个包装器，它可以递归地转换哈希值，这使得它很简单：

In Ruby 1.9 you can usually just flip the encoding using the encode method. A wrapper around this that recursively transforms the hash, not unlike symbolize_keys makes this straightforward:

class Hash
  def to_utf8
    Hash[
      self.collect do |k, v|
        if (v.respond_to?(:to_utf8))
          [ k, v.to_utf8 ]
        elsif (v.respond_to?(:encoding))
          [ k, v.dup.encode('UTF-8') ]
        else
          [ k, v ]
        end
      end
    ]
  end
end

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