Add itunes:length field in rss feed about binaergewitter.github.com HOT 7 OPEN

Little help: http://stackoverflow.com/questions/7656950/read-id3-tags-of-remote-mp3-file-in-ruby-rails

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Doesn't work.
There is no read_from_buffer() method and as far as I see there never has been one O_o

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We could download the first X bytes with a range request and safe them into a temporary file. This should do the trick.

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Doesn't seem to work that way. We might not actually have the lenght set as an ID3v2 header

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btw, I tested a few libraries using this code:

require 'uri'
require 'net/http'

size = 25000
uri = URI("http://download.binaergewitter.de/2012-01-25.Binaergewitter.Talk.0.mp3")
http = Net::HTTP.new(uri.host, uri.port)
headers = { 'Range' => "bytes=0-#{size}" }
path = uri.path.empty? ? "/" : uri.path

#test to ensure that the request will be valid - first get the head
code = http.head(path, headers).code.to_i
if (code >= 200 && code < 300) then
    #the data is available...
    result = http.get(uri.path, headers)
    File.open('test.mp3', 'wb') {|file| file.write(result.body)}
    # DO SOMETHING HERE

end

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BTW: This is an iTunes only feature. So the only formats we need to support are mp3 and m4a. For our case only supporting mp3 in cbr and vbr would do the job.

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For now, the itunes:duration field has been removed until we have a reliable way to calculate the duration of m4a and mp3 files.

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