#!/usr/bin/perl -w

use LWP::UserAgent;
use JSON;
use Encode;
use utf8;

my $ua = LWP::UserAgent->new;
$ua->timeout(10);
$ua->env_proxy;
my $url = "xxx";
my $token = 'x';
my $sign = 'xxxxx';
my $file = '/home/xxx/xxxxxxxxxx.jpg';
my $response = $ua->post($url,
                        ["token" => $token,
                         "sign" => $sign,
                         "image" => [$file]
                        ],
                        'Content_Type' => 'form-data');
if ( $response->is_success ) {
    print $response->decoded_content,"\n";
}
else {
    die $response->status_line;
}
[download]

the file param "image" use an Array "$file"