From: Carl Youngblood <carl@...>
Date: 2003-12-23T05:56:53+09:00
Subject: Re: md5

Speaking of which, where can I find documentation for the Digest class? 
  I can't find it in ruby-doc.org, and there is very little in digest.rb 
class to explain how it works.

Thanks,
Carl Youngblood

messju mohr wrote:
> On Tue, Dec 23, 2003 at 02:21:40AM +0900, KONTRA Gergely wrote:
> 
>>Hi!
>>
>>Is there any efficient way to calculate the md5 hash for a file?
>>
>>Reading the entire file isn't memory efficient under winxp (big file...) ;(
> 
> 
> require 'md5'
> 
> d = Digest::MD5.new
> chunk = nil
> md5 = nil
> begin
> while (chunk = STDIN.sysread(4096)) do
>   d.update(chunk)
> end
> rescue EOFError
>   md5 = d.to_s
> end
> print md5 + "\n"
> 
>  
> 
>>Gergo
> 
> 
>