From: Gosho Thao <hoaxuongrong098@...>
Date: 2007-10-23T18:28:03+09:00
Subject: Read mp3 tags

I'm a newbie for Ruby. I am reading an application to read mp3 tags.
I've below code to read Binary file, please help me to make full code
and rhtml viewing file when submit a form and show data on browser.

=====================

def parse_id3(mp3_file)
  fields_and_sizes = [[:track_name, 30], [:artist_name, 30],
                      [:album_name, 30], [:year, 4], [:comment, 30],
                      [:genre, 1]]
  tag = {}
  open(mp3_file) do |f|
    f.seek(-128, File::SEEK_END)
    if f.read(3) == 'TAG' # An ID3 tag is present
      fields_and_sizes.each do |field, size|
        # Read the field and strip off anything after the first null
        # character.
        data = f.read(size).gsub(/\000.*/, '')
        # Convert the genre string to a number.
        data = data[0] if field == :genre
        tag[field] = data
      end
    end
  end
  return tag
end
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