oquno化プロキシ

oqunoize_proxy.rb

#!/usr/bin/env ruby

require 'webrick'
require 'webrick/httpproxy'
require 'RMagick'

# curl -o files/oquno-c.png  http://si1.twimg.com/profile_images/96741059/oquno-c.png

handler = Proc.new() { |req,res|
  if res['content-type'] =~ /png/
    begin
      img = Magick::Image.from_blob(res.body).first
      res.body = Magick::Image.read("files/oquno-c.png").first.resize(img.columns, img.rows).to_blob
      res.content_length = res.body.size
      res['cache-control'] = 'no-cache'
    rescue
    end
  end
}

s = WEBrick::HTTPProxyServer.new(
  :BindAddress => '127.0.0.1',
  :Port => 5462,
  :ProxyContentHandler => handler
  )

Signal.trap('INT') do
  s.shutdown
end

s.start