73 lines
1.9 KiB
Ruby
73 lines
1.9 KiB
Ruby
|
require 'nokogiri'
|
||
|
|
||
|
# = XmlMini Nokogiri implementation using a SAX-based parser
|
||
|
module ActiveSupport
|
||
|
module XmlMini_NokogiriSAX
|
||
|
extend self
|
||
|
|
||
|
# Class that will build the hash while the XML document
|
||
|
# is being parsed using SAX events.
|
||
|
class HashBuilder < Nokogiri::XML::SAX::Document
|
||
|
|
||
|
CONTENT_KEY = '__content__'.freeze
|
||
|
HASH_SIZE_KEY = '__hash_size__'.freeze
|
||
|
|
||
|
attr_reader :hash
|
||
|
|
||
|
def current_hash
|
||
|
@hash_stack.last
|
||
|
end
|
||
|
|
||
|
def start_document
|
||
|
@hash = {}
|
||
|
@hash_stack = [@hash]
|
||
|
end
|
||
|
|
||
|
def end_document
|
||
|
raise "Parse stack not empty!" if @hash_stack.size > 1
|
||
|
end
|
||
|
|
||
|
def error(error_message)
|
||
|
raise error_message
|
||
|
end
|
||
|
|
||
|
def start_element(name, attrs = [])
|
||
|
new_hash = { CONTENT_KEY => '' }
|
||
|
new_hash[attrs.shift] = attrs.shift while attrs.length > 0
|
||
|
new_hash[HASH_SIZE_KEY] = new_hash.size + 1
|
||
|
|
||
|
case current_hash[name]
|
||
|
when Array then current_hash[name] << new_hash
|
||
|
when Hash then current_hash[name] = [current_hash[name], new_hash]
|
||
|
when nil then current_hash[name] = new_hash
|
||
|
end
|
||
|
|
||
|
@hash_stack.push(new_hash)
|
||
|
end
|
||
|
|
||
|
def end_element(name)
|
||
|
if current_hash.length > current_hash.delete(HASH_SIZE_KEY) && current_hash[CONTENT_KEY].blank? || current_hash[CONTENT_KEY] == ''
|
||
|
current_hash.delete(CONTENT_KEY)
|
||
|
end
|
||
|
@hash_stack.pop
|
||
|
end
|
||
|
|
||
|
def characters(string)
|
||
|
current_hash[CONTENT_KEY] << string
|
||
|
end
|
||
|
|
||
|
alias_method :cdata_block, :characters
|
||
|
end
|
||
|
|
||
|
attr_accessor :document_class
|
||
|
self.document_class = HashBuilder
|
||
|
|
||
|
def parse(string)
|
||
|
return {} if string.blank?
|
||
|
document = self.document_class.new
|
||
|
parser = Nokogiri::XML::SAX::Parser.new(document)
|
||
|
parser.parse(string)
|
||
|
document.hash
|
||
|
end
|
||
|
end
|
||
|
end
|