md5

[KONTRA Gergely]

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...) ;(

Gergo

 

[messju mohr]

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"

 

[KONTRA Gergely]

require 'md5'

[...]

Thx.
BTW A method for calculating md5 for a file would be useful, and easy...
(I mean in the distro. I can do it for me. hope so )

Gergo

 

[Carl Youngblood]

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

 

[Gavin Sinclair]

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.

The two are closely related

Gavin

 

[messju mohr]

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.

there is a ext/digest/digest.txt in the ruby source-distribution.