(1) Each field that you supply information for will have a unique name, two fields can't both be called "DATA". (2) I doubt that this is the place for a Perl scoping declaration like "our,my,local".

Actually, it's no problem to submit duplicate parameters (aka multi-valued field) — though unusual for login forms.  And our is ok there, too:

Test webserver 

#!/usr/bin/perl
{
package TestWebServer;

use HTTP::Server::Simple::CGI;
use base qw(HTTP::Server::Simple::CGI);

my %dispatch = (
    '/login' => \&resp_login,
    # ...
);

sub handle_request {
    my $self = shift;
    my $cgi  = shift;
  
    my $path = $cgi->path_info();
    my $handler = $dispatch{$path};

    if (ref($handler) eq "CODE") {
        print "HTTP/1.1 200 OK\r\n";
        $handler->($cgi);
        
    } else {
        print "HTTP/1.1 404 Not found\r\n";
        print $cgi->header,
              $cgi->start_html('Not found'),
              $cgi->h1('Not found'),
              $cgi->end_html;
    }
}

sub resp_login {
    my $cgi  = shift;   # CGI.pm object
    return if !ref $cgi;

    my %params = $cgi->Vars();
    my ($user, $pass) = split /\0/, $params{DATA};

    print $cgi->header,
        $cgi->start_html("Info"),
        $cgi->p("You sent: user='$user', pass='$pass'"),
        $cgi->end_html;
}

} 

my $pid = TestWebServer->new(8080)->background();
print "Use 'kill $pid' to stop server.\n";

[download]

LWP script: 

#!/usr/bin/perl
use strict;
use warnings;
use LWP::UserAgent;

{
    our $USER = "foo";
    our $PASS = "bar";
}

my $ua = LWP::UserAgent->new();
my $resp = $ua->post(
       "http://localhost:8080/login",
        [
            DATA => our $USER,
            DATA => our $PASS,
        ]
    );

if ($resp->is_success) {
    print $resp->decoded_content;
} else {
    print $resp->status_line;
}

[download]

Demo session: 

$ ./HTTPserver.pl
Use 'kill 25807' to stop server.
HTTP::Server::Simple: You can connect to your server at http://localho
+st:8080/

$ ./lwp-test.pl
<!DOCTYPE html
    PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-U
+S">
<head>
<title>Info</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1
+" />
</head>
<body>
<p>You sent: user='foo', pass='bar'</p>
</body>
</html>

[download]

In reply to Re^6: Crypt::SSLeay performing a HTTP POST by almut
in thread Crypt::SSLeay performing a HTTP POST by kbarker

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