I'm trying to remove a file from one zip file and add it to another using Archive::Zip. I keep getting incorrect crc on the file that was removed / added. The rest of the files in the archive are readable, not this one.

Update: I split the code that creates the zip files into another script to simplify for debugging and so I could verify neither is corrupt before running the remove/addMember code. Both the source zip files are created with Archive::Zip using addFile and they have no problems. I changed the code below to write to a new zip file to rule out the overwrite() function but still have the problem.

#!/usr/bin/perl
use warnings;
use strict;
use Archive::Zip qw(:ERROR_CODES :CONSTANTS);

my $zip1Name = '.\\tmp\\test1.zip';
my $zip2Name = '.\\tmp\\test2.zip';

my $zip1 = Archive::Zip->new();
my $zip2 = Archive::Zip->new();

if (!-e $zip2Name || !-e $zip1Name) {
      die "run test_arc.pl to create zip files for this.";
} 

unless ( $zip1->read( $zip1Name ) == AZ_OK ) {die 'zip1 read error';}
unless ( $zip2->read( $zip2Name ) == AZ_OK ) {die 'zip2 read error';}
    
my $rm_return = $zip1->removeMember('rr.log');

if ($rm_return) {
     print "removeMember : ", $rm_return->fileName() ,"\n";
     $zip2->addMember($rm_return) or 
          die "Can't add ", $rm_return->fileName() ," to zip!";

} else {print "\$rm_return is undef\n";}

unless ( $zip1->overwrite() == AZ_OK ) { 
         die 'zip1 overwrite() error'; }

#   unless ( $zip2->overwrite() == AZ_OK){die 'zip2 overwrite() error'
+;}
   unless ( $zip2->writeToFileNamed('.\\tmp\\newtest2.zip') == AZ_OK )
+ {
         die 'zip2 write() error'; }
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I ran the checkzip.pl script that came in the examples for Archive::Zip and get this:

Member rr.log CRC error: file says ff147173 computed: 354acf95
CRC errors found.
[download]

I'm using Strawberry Perl 5.12.0 on XP

Update: I found a workaround

Archive::Zip object method addMember() will corrupt the file it if you pass it a member obtained from removeMember( 'filename' ). I found I could use

 $zip->memberNamed( 'filename')

to get a member, then add that without it being corrupted. Then I have to go back and remove it from the first archive.

However, I found that

my $removed_member = $zip1->removeMember( 'foo' ); 
$removed_member->extractToFileNamed('foo');
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worked fine.