From: Erik Veenstra <google@...>
Date: 2006-03-20T04:23:49+09:00
Subject: Re: safe way to calc md5 on very large files

> Why we have no such method in the digest library?

I extended the MD5 class with a class method to build an MD5
object directly from the contents of a given file.

Use it like this:

 md5 = MD5.file("foo.bar")

gegroet,
Erik V. - http://www.erikveen.dds.nl/

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 require "md5"

 class MD5
   def self.file(file)
     File.open(file, "rb") do |f|
       res = self.new
       while (data = f.read(4096))
         res << data
       end
       res
     end
   end
 end

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