I changed you code a bit to be able to use it with both HTTP and SSL/TLS requests, so it's looks like this now:

#!/usr/bin/env perl -w

use strict; use warnings;
use LWP;

my $outgoing_headers = '';
sub LWP::Protocol::http::Socket::format_request { return main::format_
+request(@_); }
sub LWP::Protocol::https::Socket::format_request { return main::format
+_request(@_); }
sub format_request {
    my( $socket, $method, $fullpath, @h ) = @_;
    my $req_buf = $socket->Net::HTTP::Methods::format_request($method,
+ $fullpath, @h);
    $outgoing_headers = $req_buf;
    return $req_buf;
}

my $ua = new LWP::UserAgent;
my $response = $ua->get("http://example.com");
#my $response = $ua->get("https://google.com");

warn "[Headers Out Real]\n", $outgoing_headers, "\n\n";
warn "[Headers Out]\n", $response->request()->as_string(), "\n\n";
warn "[Headers In]:\n", $response->headers()->as_string, "\n\n";
[download]

It working great for test purpose. :)
But of course I can't use global variables in my real code, since it will end with complete mess. So I have another problem - I have no idea how to put "$outgoing_headers" in private variable (I'll post my pseudo code with sub below):

#!/usr/bin/env perl -w

use strict; use warnings;
use LWP;

sub LWP::Protocol::http::Socket::format_request { return main::format_
+request(@_); }
sub LWP::Protocol::https::Socket::format_request { return main::format
+_request(@_); }
sub format_request {
    my( $socket, $method, $fullpath, @h ) = @_;
    my $req_buf = $socket->Net::HTTP::Methods::format_request($method,
+ $fullpath, @h);
    # $outgoing_headers = $req_buf;
    return $req_buf;
}


sub make_request {
    my ($url) = @_;

    my $outgoing_headers = '';    # the question is - how to put them 
+here?

    my $ua = new LWP::UserAgent;
    my $response = $ua->get($url);

    warn "[Headers Out Real]\n", $outgoing_headers, "\n\n";
    warn "[Headers Out]\n", $response->request()->as_string(), "\n\n";
    warn "[Headers In]:\n", $response->headers()->as_string, "\n\n";
}

make_request('http://example.com');
[download]

Any idea how I can do this? :)

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