将 Nokogiri 文档转换为 Ruby Hash [英] Convert a Nokogiri document to a Ruby Hash

问题描述

是否有一种简单的方法可以将 Nokogiri XML 文档转换为哈希?

Is there an easy way to convert a Nokogiri XML document to a Hash?

类似于 Rails 的 Hash.from_xml.

Something like Rails' Hash.from_xml.

推荐答案

我将此代码与 libxml-ruby (1.1.3) 一起使用.我自己没有使用过 nokogiri，但我知道它无论如何都使用 libxml-ruby.我还鼓励您查看 ROXML (http://github.com/Empact/roxml/tree) 将 xml 元素映射到 ruby​​ 对象；它建立在 libxml 之上.

I use this code with libxml-ruby (1.1.3). I have not used nokogiri myself, but I understand that it uses libxml-ruby anyway. I would also encourage you to look at ROXML (http://github.com/Empact/roxml/tree) which maps xml elements to ruby objects; it is built atop libxml.

# USAGE: Hash.from_libxml(YOUR_XML_STRING)
require 'xml/libxml'
# adapted from 
# http://movesonrails.com/articles/2008/02/25/libxml-for-active-resource-2-0

class Hash 
  class << self
        def from_libxml(xml, strict=true) 
          begin
            XML.default_load_external_dtd = false
            XML.default_pedantic_parser = strict
            result = XML::Parser.string(xml).parse 
            return { result.root.name.to_s => xml_node_to_hash(result.root)} 
          rescue Exception => e
            # raise your custom exception here
          end
        end 

        def xml_node_to_hash(node) 
          # If we are at the root of the document, start the hash 
          if node.element? 
           if node.children? 
              result_hash = {} 

              node.each_child do |child| 
                result = xml_node_to_hash(child) 

                if child.name == "text"
                  if !child.next? and !child.prev?
                    return result
                  end
                elsif result_hash[child.name.to_sym]
                    if result_hash[child.name.to_sym].is_a?(Object::Array)
                      result_hash[child.name.to_sym] << result
                    else
                      result_hash[child.name.to_sym] = [result_hash[child.name.to_sym]] << result
                    end
                  else 
                    result_hash[child.name.to_sym] = result
                  end
                end

              return result_hash 
            else 
              return nil 
           end 
           else 
            return node.content.to_s 
          end 
        end          
    end
end

这篇关于将 Nokogiri 文档转换为 Ruby Hash的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！