From: Elliot Temple <curi@...>
Date: 2008-11-07T08:24:58+09:00
Subject: Partial Read From URL

Can anyone see a problem with this code to read only 20k from a URL? The
http connection will get closed, right?

Is there a better way to do this? My goal is to download the start of
mp3 files and then estimate their duration without downloading the
entire file.

def partial_uri_read(uri)
  u = URI.parse(uri)
  s = ""
  Net::HTTP.start(u.host, u.port) do |http|
    http.request_get(u.path) do |response|
      response.read_body do |chunk|
        s << chunk
        return s if s.size > 20000
      end
    end
  end
  s
end

Thanks
Elliot Temple
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