Rails - May 2010 - downloading .pdf file

Hi,

I know how to get a .html file and writing contents into a file in the
server.

eg.
 doc = Nokogiri::HTML(open("http://projectmadurai.org").read)
              my_file = File.new("pm.html", "w")
              my_file.puts doc.inner_html
              my_file.close

I want to download a .pdf file in a similar way. How can I achieve this?
-- 
-- 
Nandri(Thanks in Tamil),
Amala Singh

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