the browser gives an Internal Server Error

The code I showed isn't a complete CGI example, since it doesn't output the headers, so those would need to be added back in. Since in the original code those are being written by hand, I'd suggest at least upgrading to one of the CGI modules, such as e.g. CGI::Simple, to generate those for you.

Wide character in IO::Compress::Zip::write

That would mean that there's Unicode in your @lines. (Although I don't see an encoding being set on TARGET in the original code, so I think it would have the same issue?) Anyway, although IO::Compress::Zip provides a filehandle-like interface, it looks like it doesn't (yet?) support encoding layers. A manual encoding with Encode does work though:

use warnings;
use strict;
use IO::Compress::Zip qw/$ZipError/;
use Encode qw/encode/;

my @lines = (qw/ Hello World Foo Bar /, "\N{U+1F42A}");
my $eol = "\r\n";
my $encoding = "UTF-8"; # or maybe "CP1252" for Windows

binmode STDOUT;  # just to play it safe
my $z = IO::Compress::Zip->new('-', # STDOUT
    Name => "Filename.txt" )
        or die "zip failed: $ZipError\n";
for my $line (@lines) {
    $z->print( encode($encoding, $line.$eol,
        Encode::FB_CROAK|Encode::LEAVE_SRC) );
}
$z->close();

[download]

Note: For encodings such as UTF-16, it seems encode adds a Byte Order Mark for every string it encodes, and I don't see an option in the module to disable that. One way to get rid of them is to remove them manually, but an alternative might be to replace the for loop with this, at the expense of higher memory usage: $z->print( encode($encoding, join('', map {$_.$eol} @lines), Encode::FB_CROAK|Encode::LEAVE_SRC) ); - or just stick to UTF-8, as that's pretty ubiquitous.

Update:

I remove the $CRLF from the lines

You can leave that in and remove my $eol, as they're the same thing (I missed that on my first read of the original source, sorry).

In reply to Re^3: Correct Perl settings for sending zipfile to browser by haukex
in thread Correct Perl settings for sending zipfile to browser by Anonymous Monk

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