Download GIFs from 9gag

9gag-gif

#!/usr/bin/env ruby

require 'open-uri'

url = ARGV[0]
$stderr.puts 'URL not specified' and exit 1 unless url
uri = URI.parse url
$stderr.puts 'This should be 9gag.com URL' and exit 1 if uri.host != '9gag.com'
m = uri.path.match %r{^/gag/(\w+)$}
$stderr.puts 'Malformed URL!' and exit 1 unless m

id = m[1]

body = uri.read
m = body.match %r{data-image="(https?://.+#{id}.+\.gif)"}
gif_url = m[1]

gif_filename = "#{id}.gif"

File.binwrite(gif_filename, URI.parse(gif_url).read)