See the section Delayed Response and Streaming Body in the PSGI specification.
What you want is something like this (untested):
use strict;
use warnings;
####use Plack::Response; # doesn't seem to support streaming response
use Path::Tiny;
use File::MimeInfo;
sub return_psgi {
my $self = shift;
my $path_file = shift;
my $content_type = mimetype($path_file);
$content_type = 'application/octet-stream' if not defined $content
+_type;
my $content = path($path_file);
my $content_download = $content->slurp;
require File::Spec::Unix;
my $basename = $path_file;
$basename =~ s|\\|/|g;
$basename = ( File::Spec::Unix->splitpath($basename) )[2];
$basename =~ s|[^\w\.-]+|_|g;
return sub {
my $responder = shift;
my $writer = $responder->(
[ 200, [
'Content-Type' => $content_type,
'Content-Disposition' => qq[attachment; filename="$
+basename"],
]
]
);
open (FILE, "< $path_file") or die "can't open $path_file: $!"
+;
binmode FILE;
local $/ = \102400;
while (<FILE>) {
$writer->write($_);
}
$writer->close();
close FILE;
}
}