Open an XML file and download images from its nodes...

xml_image_downloader.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'

XML_FILE_LOCATION = 'path/to/my/xml/file.xml'
XML_XPATH = '//ANode'
XML_ATTR_FOR_IMAGE_NAME = 'imagename'
XML_ATTR_FOR_IMAGE_URL = 'imageurl'

file = File.open(XML_FILE_LOCATION, "rb")
xml_string = file.read

xml = Nokogiri::XML( _xml_string )
img_srcs = xml.xpath(XML_XPATH)

img_srcs.each do |img|
  image_name = img.attr(XML_ATTR_FOR_IMAGE_NAME)
  image_url = img.attr(XML_ATTR_FOR_IMAGE_URL)

  open(image_url) {|f|
     File.open(image_name,"wb") do |file|
       file.puts f.read
     end
  }
end