5. gyakorlat – Googler Sinatra-val

googler.rb

require 'rubygems'
require 'nokogiri'
require 'uri'
require 'open-uri'
require 'sinatra'

get '/search/:query' do
  html = "<pre>"
  doc = Nokogiri::HTML(open("http://www.google.com/search?q=#{URI.encode(%{"#{params[:query]}"})}"))
  doc.css(".g").each do |hit|
    link = hit.at_css("h3 a")
    if summary = hit.at_css(".s") and summary.child.name != "table"
      html << link.content << "\n"
      html << %{<a href="#{link['href']}">#{link['href']}</a>} << "\n"
      summary.css("div", "cite", ".gl").remove
      html << summary.content << "\n\n"
    end
  end
  html << "</pre>"
end