Ruby Italia

Note: ~~Testo rimosso dalla rev 7~~ e Testo aggiunto nella rev8

require 'net/http'
require 'uri'

class Feed
  def initialize(url, opts = { })
    @uri = URI.parse(url)
  end
  def read
    @uri.read
  end
end

FeedData = Struct.new(
  :channel, 
  :titles, 
  :descriptions, 
  :links
  )

class RssParser
  CHANNEL_TITLE=%r{<channel(?!s).*?>.*?(?:<title>(?:<!\[CDATA\[)*(.*?)(?:\]\]>)*</title>.*?)?</channel>}m
  ITEM_TITLE=%r{<item(?!s).*?>.*?(?:<title>(?:<!\[CDATA\[)*(.*?)(?:\]\]>)*</title>.*?)?</item>}m 
  ITEM_LINKS=%r{<item(?!s).*?>.*?(?:<link>(?:<!\[CDATA\[)*(.*?)(?:\]\]>)*</link>.*?)?</item>}m
  ITEM_DESCRIPTION=%r{<item(?!s).*?>.*?(?:<description>(?:<!\[CDATA\[)*(.*?)(?:\]\]>)*</description>.*?)?</item>}m

  def initialize(feed)
    @feed = feed
  end 

  def parse
    FeedData.new( 
      extract( CHANNEL_TITLE    ),            
      extract( ITEM_TITLE       ),
      extract( ITEM_DESCRIPTION ),
      extract( ITEM_LINKS       )
      )  
  end

  private

  def rss_data
    @data ||= @feed.read
  end

  def extract pattern
    rss_data.scan pattern 
  end
end

class RssMaker
  def align text
    text.gsub(/^\s*\./m, '') 
  end
  private :align
  def header
    align <<-HTML
             .Content-type: text/html\r\n\r\n
             .<html>
             .<body>
             HTML
  end

  def footer
    align <<-HTML
             .</body>
             .</html>
             HTML
  end

  def channel name
    align <<-HTML
             .<h3>#{name}</h3>
             HTML
  end

  def entry titolo, descrizione, link
    align <<-HTML
             .<strong>
             .  <a href="#{link}"> #{titolo} </a>
             .</strong><br/>
             .
             .<font size="-1"> #{descrizione} </font>
             .<p/>
             HTML
  end

end

##############################

# Configurations

feeds=[
    'http://www.repubblica.it/rss/scienza_e_tecnologia/rss2.0.xml',
    'http://programmazione.it/rss.xml',
    'http://www.hwupgrade.it/rss_news.xml',
    'http://www.hwupgrade.it/rss_articoli.xml',
    'http://www.beppegrillo.it/index.xml'
]

NEED_PROXY = false #switch this if you have a proxy
proxy_url = "http://10.0.0.2:8080" #put here your proxy, if you have one

##############################

class LunaRss
  def get_feeds
    rss_make = RssMaker.new
    puts rss_make.header

    feeds.each do |feed|
      parser = RssParser.new feed 
      data = parser.parse
      puts rss_make.channel( data.channel )
      0.upto data.titles.length do|i|
        puts rss_make.entry( 
          data.titles[i], 
          data.descriptions[i], 
          data.links[i] 
          )
      end
    end

    puts rss_make.footer
  end
end

require 'test/unit'
require 'stringio'

class TestLunaRss < Test::Unit::TestCase
  TEST_DATA = <<-HTML
      <?xml version="1.0"?>
      <rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">
        <channel>
          <title>Ruby Italia</title>
          <link>http://ruby-it.org/</link>
          <description>Tracking all versions for Ruby Italia</description>
          <language>it-it</language>
          <ttl>40</ttl>
          <item>
            <title>Chiaroscuro</title>
            <description>description too long</description>
            <pubDate>Mon, 08 May 2006 13:33:54 +0200</pubDate>
            <guid>http://ruby-it.org/pages/Chiaroscuro#936</guid>
            <link>http://ruby-it.org/pages/Chiaroscuro#936</link>
            <dc:creator>Chiaroscuro</dc:creator>
          </item>
        </channel>
      </rss>
    HTML

  def test_parser
    parser = RssParser.new(StringIO.new(TEST_DATA))
    data = parser.parse
    assert_equal "Ruby Italia".to_s, data.channel[0].to_s
    assert_equal "Chiaroscuro".to_s, data.titles[0].to_s
    assert_equal "description too long".to_s, data.descriptions[0].to_s
    assert_equal "http://ruby-it.org/pages/Chiaroscuro#936".to_s, data.links[0].to_s
  end  

end

class TestLunaRssStore < Test::Unit::TestCase
  Page=Struct.new :title, :body
  TestPages=[Page.new("Andrea",<<Andrea),Page.new("antonio", <<Antonio)]
bla bla 
feed: http://guragedev.blogspot.com/atom.xml
bla bla
Andrea

ble bn
ble 
aleklena
feed: http://www.antoniocangiano.com/xml/rss20/feed.xml
feed: http://www.antoniocangiano.com/xml/rss20/comments/feed.xml
Antonio

  def test_load_data
    RssStore.new(TestPages)
    uris=RssStore.load_feed_uris
    assert_equal 3, uris.size
  end
end

La comunità italiana dedicata a ruby

Ruby Italia

LunaRss v0.9 – modificato da Gabriele Renzi