Module: Faviconduit

Defined in:
lib/faviconduit.rb

Defined Under Namespace

Classes: Error, Favicon, InvalidFavicon, MissingFavicon

Class Method Summary collapse

Class Method Details

.get(url) ⇒ Object 



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# File 'lib/faviconduit.rb', line 16

def self.get(url)

  uri = Addressable::URI.heuristic_parse(url)
  uri = Addressable::URI.encode(uri) # needed for chars with accents in url

  doc = Nokogiri::HTML(open(uri))

  path = doc.xpath("//link[@rel='shortcut icon' or @rel='icon']/@href").first
  path = path ? path.to_s : '/favicon.ico'

  fav_uri = Addressable::URI.join(uri, path.to_s)

  begin

    stream = open(fav_uri)

    unless stream.content_type[/^image/]
      raise(InvalidFavicon, "wrong content_type (#{stream.content_type})")
    end

    data = stream.read

    if data.size == 0
      raise(InvalidFavicon, "zero data")
    end

    fav = Favicon.new
    fav.url = fav_uri.to_s
    fav.data = data
    return fav

  rescue OpenURI::HTTPError => e
    raise MissingFavicon if e.to_s[/404/]
    raise # nevermind, reraise the previous exception
  end

end