nokogiriでページを解析します。

#  rubyer.me          
require 'nokogiri'
require 'open-uri'

website_url = "http://www.rubyer.me"
STDERR.puts "processing #{website_url}..."
doc = Nokogiri::HTML(open(website_url))

path = "/html/body/div/div/div/article/header/h1/a"
topics = doc.xpath(path)
topics.each { |t|
	puts t.content
}