I need the ability to zip a bunch of files using some logic for the archiving. However, due to the fact that these files need to be zipped prior to backing up, I need to validate the files. The plan is to zip the files then loop through all files in the zip and validate the CRC. The problem I am having is that I cannot get the CRC's to match. I am using an example from here. I'm using the following sub for validation: 
    use Archive::Zip qw( :ERROR_CODES :CONSTANTS );
    use File::Path 'mkpath';
    use IO::File;
        ##
        # Zipfile validation
        ##
        my $zipvalidate = Archive::Zip->new();
        if ( $zipvalidate->read( $archivedir.$filename ) != 0 ) {
            print STDERR "ERROR Opening $archivedir$filename\n";
            next;
        }

        foreach my $member ($zipvalidate->members()){
            my $fh = IO::File->new_tmpfile or print "Unable to make ne
+w temp file: $!";

            $member->extractToFileHandle($fh);
            if ($member->extractToFileHandle($fh) != 0){
                print "Error in $archivedir$filename\n";
                next;
            }
            seek($fh, 0, 0);
            binmode($fh);
            
            my $buffer;
            my $bytesRead;
            my $crc = 0;
            while ( $bytesRead = $fh->read( $buffer, 32768 ) ) {
                $crc = Archive::Zip::computeCRC32( $buffer, $crc );
            }
            printf( "\nFrom CALC: %08x", $crc );
            printf( "\tFrom ZIP: %08x", $member->crc32() );
            print "\t";
            print $member->fileName();
            print "\n";
            #undef $fh;
            }
        }

[download]
Any assistance would be greatly appreciated. Thanks

In reply to Zip file CRC validation by msalerno

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