How can I output a UTF-8 encoded XML file with unix line-endings from ActivePerl on Windows?

I'm running ActivePerl 5.8.8 on WinXP. I'd like to output an XML file as UTF-8 with UNIX line endings.

I've looked at the perldoc for binmode, but am unsur开发者_如何学Pythone of the exact syntax (if I'm not barking up the wrong tree). The following doesn't do it (forgive my Perl - it's a learning process!):

sub SaveFile
{
    my($FileName, $Contents) = @_;

    my $File = "SAVE";
    unless( open($File, ">:utf-8 :unix", $FileName) )
    {
        die("Cannot open $FileName");
    }
    print $File @$Contents;

    close($File);
}

If $Contents does not already have \n characters, print will not add them for you. You must do that yourself.

There's a couple other things that might be problematic; here's how to fix them and why.

IO Layers

To enable utf8 output, you need to use :utf8, not :utf-8. In addition, you should not have spaces in your IO layers, so it should look like `">:utf8:unix".

Open

To open a file, you can declare the 'my $fh' in line; no need to initialize it to a string to start. It's okay, this is good practice. In addition, using or is the preferred way to catch open errors.

Changed around, your code looks like this now:

sub SaveFile
{
    my($FileName, $Contents) = @_;

    open my $File, ">:utf8:unix", $FileName
        or die "Cannot open $FileName";
    print $File map { "$_\n" } @$Contents;

    close($File);
}

map lets you transform your input array by adding the newlines to each line before it prints them, and does it in order.

Good luck!

I think you need something like this.

use strict;
use warnings;

sub save_file {
    my ($file_name, $content) = @_;
    open my $fh, ">", $file_name or die $!;
    binmode $fh, ':utf8 :unix';
    print $fh @$content;
    close $fh;
}

# For example.
save_file('foo.txt', [ map "$_\n", qw(foo bar baz)]);

For typical use of the 3-argument form of open, you want the file handle variable to be undefined before calling open. See the docs for details.