Mac のクリップボードを監視して、設定されたファイル拡張子をwget で実行フォルダにダウンロード。

clipboard_watch_and_download.rb

require 'pp'
require 'clipboard'

module Downloader
  @@target_file_exts = [:jpg, :png, :gif, :bmp, :doc, :pdf]
  @@cache = []

  def clipboard_text
    #%x(pbpaste).scrub
    Clipboard.paste.scrub
  end
  def download
    clipboard_text = clipboard_text()
    return if cached? clipboard_text
    return unless download? clipboard_text
    puts "URL: #{clipboard_text}"
    puts '----'
    begin
      spawn("wget #{clipboard_text}", STDERR => STDOUT)
    rescue Erno::ENOENT => e
      puts "failed download."
      puts "Error: #{e.message}"
    end
    cache clipboard_text
    clipboard_text
  end
  def target_file_exts ar=nil
    if ar.is_a? Array then
      unless ar.nil? then
        @@target_file_exts = ar.map(&:to_sym)
      end
    end
    @@target_file_exts
  end
  def download? str
    ext = file_ext str
    return false if str.nil?
    target_file_exts.find_index(ext.to_sym) ? true : false
  end
  def file_ext str
    str.split('.').last.to_s[0..-1]
  end
  def cache str=nil
    return @@cache if str.nil?
    @@cache << str
    @@cache.uniq!
  end
  def cached? url
    @@cache.find_index(url) ? true : false
  end
end

class ClipboardWatch
  include Downloader
end

c = ClipboardWatch.new
c.target_file_exts ARGV if ARGV.size > 0
print "target file extensions: "
pp c.target_file_exts
loop do
  c.download
  sleep 2
end