WWW::Curl has an awful programming interface. Use libwww-perl instead. Here an example of how complicated it can get at the most: making a HTTP POST request with a custom HTTP header field and XML in the HTTP message body.

#!/usr/bin/perl -T
use strict;
use diagnostics;
use LWP::UserAgent;

my $req    = HTTP::Request->new(
    POST    => 'http://example.com/webservice',    # method and URI
);
$req->content_type('application/xml');
$req->content('<hello>world!</hello>');

my $ua    = LWP::UserAgent->new;
$ua->timeout(5);

my $res    = $ua->request($req);

print $res->content if $res->is_success;
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