#!/usr/bin/perl --
use strict; use warnings;
use LWP;
use HTTP::Request::Common qw/ POST /;
use Encode ;

my $url = q[http://localhost/];
my $req = POST(
    $url,
    Content_Type => 'multipart/form-data',
    Content      => [
        fileuploadfieldname => [
            undef, # filename_to_read
encode("UTF-8", qq'stupid \x{8216}smart\x{8217} and "quoted" filename.txt'),
            -content => 'stupid content'
        ],
    ],
);

dd( $req = $req->as_string );

{
    $req = HTTP::Request->parse ( $req );
    $req = HTTP::Response->new(200, "OK", $req->headers, $req->content );
    $req = HTTP::Response->parse( $req->as_string );
    $req = HTTP::Response->new(200, "OK",  $req->parts ->headers );
    dd( $req );
}

dd( $req->filename );
sub dd {
    use Data::Dumper;
    print Data::Dumper->new([@_])->Useqq(1)->Dump, "\n";
}
__END__

$VAR1 = "POST http://localhost/\nContent-Length: 169\nContent-Type: multipart/form-data; boundary=xYzZY\n\n--xYzZY\r\nContent-Disposition: form-data; name=\"fileuploadfieldname\"; filename=\"stupid \350\210\226smart\350\210\227 and \\\"quoted\\\" filename.txt\"\r\n-Content: stupid content\r\n\r\n\r\n--xYzZY--\r\n";

$VAR1 = bless( {
                 "_content" => "",
                 "_rc" => 200,
                 "_headers" => bless( {
                                        "content-disposition" => "form-data; name=\"fileuploadfieldname\"; filename=\"stupid \350\210\226smart\350\210\227 and \\\"quoted\\\" filename.txt\"",
                                        "-content" => "stupid content"
                                      }, 'HTTP::Headers' ),
                 "_msg" => "OK"
               }, 'HTTP::Response' );

$VAR1 = "stupid \350\210\226smart\350\210\227 and \"quoted\" filename.txt";