sparkel has asked for the wisdom of the Perl Monks concerning the following question:

Hello fellow monks,

I am trying to add files to the newest zip file in a directory. But if the newest zip file contains files more than 3 months long, I create a new zip file and store my files in the new zip file.

So this is what I am doing now to find the newest zip file in the directory: 


#finding the newest .zip file in the directory
my $zipFile = reduce {(stat $a)[10] > (stat $b)[10] ? $a : $b} glob Fi
+le::Spec->catfile($dir, '*.zip');

[download]

Could you please tell me how I can open up a zip file and check if the difference between the oldest file and the newest file in there is equal to or less than 3 months old?

Thank you.

Replies are listed 'Best First'.
Re: Checking file dates in a Zip file
by Yendor (Pilgrim) on Dec 02, 2004 at 17:59 UTC

    It looks like you can use Archive::Zip to open up a Zip file.

    use Archive::Zip;

my $zip = Archive::Zip->new("yourfile.zip");

    [download]

    Once you have the Zip file opened, use the members() method to get a list of files contained in the Zip archive, and loop over them:

    my @members = $zip->members();

foreach my $member (@members) {
  # ...
}

    [download]

    Where the # ... is is where the interesting bits of your code need to go. In order to check out the last modified time of the $fh you have, call $member->lastModTime().

    So let's put this together...

    #!/usr/bin/perl -T

use strict;
use warnings;
use Archive::Zip;

my $zip     = Archive::Zip->new("file.zip");
my $members = $zip->members();

my $firstdate;
my $lastdate;   # No need to fill these in with "never", because I hav
+e had dates before.  ;-)

foreach my $member (@members) {
  my $filedate = $member->lastModTime();

  if (($filedate < $firstdate) || (!defined($firstdate)) {
    $firstdate = $filedate;
  }
  if ((!defined($lastdate) || ($filedate > $lastdate)) {
    $lastdate = $filedate;
  }
}

$fh->close();

# Calculate the difference between the first and last
# file dates...
my $datediff = $lastdate - $firstdate;

# Check if the time difference between the first and last
# files is more than 3 months...
if ($datediff > (60 * 60 * 24 * 30 * 3)) {
  # You need a new file
}

    [download]

    Please note that this code is completely untested, but it should at least be a reasonable start...

    -Yendor

    IWeThey
    HOPE Ride

[reply]
[d/l]
[select]
      hehe...that is funny :)

      Thank you...that did work.

[reply]

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