LZO/Ruby: 圧縮してみる

きちんと圧縮できてるか不安だったので、ちょっと動作確認。

require 'lzoruby'

open('index.html', 'rb') do |fin|
  open('index.html.lzo', 'wb') do |fout|
    fout << LZO.compress(fin.read)
  end
end

open('index.html.lzo', 'rb') do |fin|
  open('index.html.2', 'wb') do |fout|
    fout << LZO.decompress(fin.read)
  end
end

~/work$ wget http://d.hatena.ne.jp/winebarrel/

--2008-07-29 03:15:57--  http://d.hatena.ne.jp/winebarrel/

Resolving d.hatena.ne.jp... 59.106.108.77

Connecting to d.hatena.ne.jp|59.106.108.77|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: unspecified [text/html]

Saving to: `index.html'
    [  <=>                                                      ] 85,883       356K/s   in 0.2s
2008-07-29 03:15:58 (356 KB/s) - `index.html' saved [85883]
~/work$ ruby foo.rb

~/work$ ll index.html*

-rw-r--r-- 1 sugawara 84K Jul 29 02:33 index.html

-rw-r--r-- 1 sugawara 84K Jul 29 03:16 index.html.2

-rw-r--r-- 1 sugawara 23K Jul 29 03:16 index.html.lzo

~/work$ diff index.html index.html.2

伸長用のバッファのサイズって、アーカイブの８倍で大丈夫かなぁ…