Download an imgur.com gallery with Ruby and Nokogiri

imgur.rb

#!/usr/bin/env ruby

# Download imgur.com galleries easily
#
# Requirements:
#   gem install nokogiri
#
# Usage:
#   ruby imgur.rb [url of gallery] [directory to download into] [namespace for files]
#
# Example:
#   ruby imgur.rb http://imgur.com/a/npV94 battlefield3 scenery
#   All files will be downloaded into battlefield3 with filenames in the pattern of
#   scenery-[number].jpg


require 'nokogiri'
require 'open-uri'

url = URI.parse ARGV[0]
directory = ( defined?(ARGV[1]) ? ARGV[1] : File.basename(url.to_s) )
namespace = ( defined?(ARGV[2]) ? ARGV[2] : File.basename(url.to_s) )
page = Nokogiri::HTML(open url)
images = []

page.search('.thumb-title').each do |image|
  images << image.attributes['data-src'].value.gsub(/s.jpg/, '.jpg')
end

unless FileTest.directory? directory
  puts "Creating #{directory}"
  Dir.mkdir directory
end

puts "Downloading images into #{directory}...\n\n"

images.each_with_index do |image, i|
  puts "Downloading #{image} as #{namespace}-#{i}.jpg..."
  file = open(image)
  File.open("#{directory}/#{namespace}-#{i}.jpg", 'w') do |f| 
    f.write file.read
  end
end

puts "\nDone."

you can download imgur image from link if you appended '.jpg' to the end of the link,
so you can use the following snippit

def download_imgur( url, filename )
  image = open( "#{url}.jpg" ).read
  File.write("#{filename}.jpg", image)
end