You might want to check out HTTP::Request::Common as an easy way to build HTTP requests, e.g.:

use HTTP::Request::Common qw/POST GET/;

my $req = POST $url, [
                       foo => "blah",
                       bar => "hurg",
                       stumbit => "sexisgood"
                     ];

if ($lwp->request($req)->is_success()) {
   # ...
}
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[ ar0n -- want job (boston) ]