From: Jeffrey Schwab <jeff@...>
Date: 2006-03-17T09:03:47+09:00
Subject: Re: Delayed File I/O & ZLIB - Any help would be appreciated

Brian Corrigan wrote:
> Folks,
> 
> Hey Folks,
> 
> I've written a script to generate a list of all files on a machine,
> then zip the results.  Im going to use it to audit some file servers.
> The problem is that the ZIP compression/decrompression isn't working,
> but its not what you might think.  The script completes, but seems to
> not actually write anything.
> 
> Here is a short version that only looks at the C:/temp drive.  You can
> change this at the top.
> 
> ---Start Code Here--
> require 'find'
> require 'csv'
> require 'zlib'
> 
> tempfile = "temp.csv"
> outfile  = "out.zip"
> dirname = "c:/temp"
> 
> # Prepare comma-delimited file for writing
> CSV::Writer.generate(File.open(tempfile,"w+"), ',') do |csv|
>       Find.find(dirname) do |f|
> 	  csv << [File.dirname(f), File.basename(f), File.mtime(f).to_s]
>       end
> end
> 
> # TEST: View the tempfile to make sure it has data.
> #  This prints nothing, but the file DOES have info after
> # the script completes.  Maybe the file isn't written at this point?
> p IO.read(tempfile)

Are you sure that's not printing anything?  It should be print exactly 
one line of output.

> Zlib::GzipWriter.open(outfile) do |gz|
>   gz << File.open(tempfile).read
> end
> 
> Zlib::GzipReader.open(outfile) {|gz|
>   print gz.read
> }
> 
> # The ZIP file can't be extracted with WINZIP.  No idea why, but since
> # I'll be using another RUBY script for extraction, im not sure that I
> care.

You didn't zip the file, you gzipped it.  I happen to prefer gzip, but 
if you want zip, this might help:

	http://rubyzip.sourceforge.net/