gistfile1.rb

#!/usr/bin/env ruby

require 'net/http'
require 'cgi'
require 'rubygems'
require 'hpricot'

class Proxy
  def initialize
    @url = nil
    @path = nil
    get_path
  end
  
  # URL中の"url"引数からurlを取得
  def get_url
    cgi = CGI.new
    url = cgi.params["url"]     
    return url[0]
  end
    
  # URL中のドメインとパスを正規表現で分離
  def get_path
    if /(.+?)(\/.*)/ =~ get_url
      @url = $1
      @path = $2
    else
      @url = get_url
      @path = "/"
    end
  end
    
  # HTTPリクエストヘッダを書き換え
  def http_get
    http = Net::HTTP.new("#{@url}")
    response = http.request_get("#{@path}", "User-Agent" => "DoCoMo/2.0 N901iS(c100;TB;W24H12)")
    print "Content-Type: ", response['content-type'], "\n\n"
    response.body
  end  
end

proxy = "http://localhost/proxy/proxy.rb?url="
output = Proxy.new
# puts output.http_get
doc = Hpricot(output.http_get)
(doc/:a).each do |link|
  link[:href] = link[:href].sub(/\?.+/, "")
  unless /http:\/\// =~ link[:href]
    link[:href] = link[:href].sub(/(\.\/)?/, proxy + output.get_url + "/")
  end
end
(doc/:img).each do |img|
  img[:src] = img[:src].sub(/\?.+/, "")
  unless /http:\/\// =~ img[:src]
    img[:src] = img[:src].sub(/(\.\/)?/, proxy + output.get_url + "/")
  end
end
puts doc