I'm trying to upload a file, via REST. but I keep getting a 500 Not a SCALAR reference I'm read numerous articles as to why...I can only speculate that my data/content is not correctly formatted.

use strict;
use warnings;
use diagnostics;

use IO::Socket::SSL qw( SSL_VERIFY_NONE );
use LWP::UserAgent;
use Data::Dumper;
use MIME::Base64;
use JSON;

    my $json = JSON->new;
    my $ua = LWP::UserAgent->new();
    $ua->ssl_opts( SSL_verify_mode => IO::Socket::SSL::SSL_VERIFY_NONE
+, SSL_hostname => '', verify_hostname => 0 );
    $ua->default_header('Content-Type' => 'application/json' );
    $ua->default_header('Content_Type' => 'form-data;boundary=xYzZY');
    $ua->default_header('Authorization', "Basic " . encode_base64("adm
+in:password"));
    $ua->timeout(600);

    my $file = ["/tmp/test_image.tgz.bin"];
    my $url = "https://10.248.179.31/api/rest/software_package";


    my $header = ['Content-Type' => 'form-data;boundary=xYzZY'];
    my $request = HTTP::Request->new("POST", "$url", $header, $file);
#    my $request = HTTP::Request->new("GET", "${url}?select=*", undef)
+;

    print Dumper $request;
    my $res = $ua->request($request);

    if($res->is_success) {
        my $data = $json->decode($res->decoded_content);
        print Dumper $data;
    }
    else {
        print Dumper $res;
    }
[download]

Here is what the request looks like...

$VAR1 = bless( {
                 '_headers' => bless( {
                                        'content-type' => 'form-data;b
+oundary=xYzZY'
                                      }, 'HTTP::Headers' ),
                 '_uri' => bless( do{\(my $o = 'https://10.248.179.31/
+api/rest/software_package')}, 'URI::https' ),
                 '_content' => [
                                 '/tmp/test_image.tgz.bin'
                               ],
                 '_method' => 'POST'
               }, 'HTTP::Request' );
[download]

And here is the response

$VAR1 = bless( {
                 '_headers' => bless( {
                                        'content-type' => 'text/plain'
+,
                                        'client-warning' => 'Internal 
+response',
                                        '::std_case' => {
                                                          'client-date
+' => 'Client-Date',
                                                          'client-warn
+ing' => 'Client-Warning'
                                                        },
                                        'client-date' => 'Fri, 14 Dec 
+2018 21:18:16 GMT'
                                      }, 'HTTP::Headers' ),
                 '_rc' => 500,
                 '_request' => bless( {
                                        '_headers' => bless( {
                                                               'author
+ization' => 'Basic YWRtaW46UGFzc3dvcmQxMjMh
',
                                                               '::std_
+case' => {
                                                                      
+           'if-ssl-cert-subject' => 'If-SSL-Cert-Subject'
                                                                      
+         },
                                                               'conten
+t-type' => 'form-data;boundary=xYzZY',
                                                               'user-a
+gent' => 'libwww-perl/6.26'
                                                             }, 'HTTP:
+:Headers' ),
                                        '_uri' => bless( do{\(my $o = 
+'https://10.248.179.31/api/rest/software_package')}, 'URI::https' ),
                                        '_content' => [
                                                        '/tmp/test_ima
+ge.tgz.bin'
                                                      ],
                                        '_method' => 'POST'
                                      }, 'HTTP::Request' ),
                 '_content' => 'Not a SCALAR reference at /usr/lib/per
+l5/vendor_perl/5.18.2/LWP/Protocol/http.pm line 256.
',
                 '_msg' => 'Not a SCALAR reference'
               }, 'HTTP::Response' );
[download]