#!/usr/bin/perl --

use strict;
use warnings;

use LWP  5.825;

my $url = "http://foo/upload";
my $file = __FILE__;#"foo/bar";

my $ua = LWP::UserAgent->new;
$HTTP::Request::Common::DYNAMIC_FILE_UPLOAD = 1;

use HTTP::Request::Common;
my $req = POST(
    $url,
    Content_Type => 'multipart/form-data',
    Content      => [ file => [$file] ],
);

# set up callback
{
    my $gen = $req->content();
            die unless ref($gen) eq "CODE";
    my $i = 0;
    $req->content(
        sub {
            my $chunk = &$gen(); # get chunk of data
            warn $i++;
            return $chunk;       # send it to $url
        }
    );

#use Data::Dumper;die print Data::Dumper->new([($ua,$req, $gen)])->Ind
+ent(1)->Deparse(1)->Dump;
}

my $res = $ua->request($req);   #do it 
print $res->status_line;
[download]

Thanks for the feed back. Hi can you explain what the below code actually do

# set up callback
{
    my $gen = $req->content();
            die unless ref($gen) eq "CODE";
    my $i = 0;
    $req->content(
        sub {
            my $chunk = &$gen(); # get chunk of data
            warn $i++;
            return $chunk;       # send it to $url
        }
    );
[download]

Thanks for the feed back. Hi can you explain what the below code actually do

Hi. There is no way you were overrider ;)

The code saves the default (DYNAMIC_FILE_UPLOAD) callback for uploading a large file, and wraps it in another callback, which invokes the original callback, but also counts the number of times it was called, and reports the number stderr