#!/usr/bin/env perl
#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
#***************************************************************************

use strict;
use warnings;

# This script invokes nghttpx properly to have it serve HTTP/3 for us.
# nghttpx runs as a proxy in front of our "actual" HTTP/1 server.

use Cwd;
use Cwd 'abs_path';
use File::Basename;
use File::Spec;

my $verbose = 0;     # set to 1 for debugging
my $logdir = "log";
my $pidfile = "$logdir/nghttpx.pid";
my $logfile = "$logdir/http3.log";
my $nghttpx = "nghttpx";
my $listenport = 9017;
my $connect = "127.0.0.1,8990";
my $cert = "test-localhost";
my $conf = "nghttpx.conf";
my $dev_null = File::Spec->devnull();

#***************************************************************************
# Process command line options
#
while(@ARGV) {
    if($ARGV[0] eq '--verbose') {
        $verbose = 1;
    }
    elsif($ARGV[0] eq '--pidfile') {
        if($ARGV[1]) {
            $pidfile = $ARGV[1];
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--nghttpx') {
        if($ARGV[1]) {
            $nghttpx = $ARGV[1];
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--port') {
        if($ARGV[1]) {
            $listenport = $ARGV[1];
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--connect') {
        if($ARGV[1]) {
            $connect = $ARGV[1];
            $connect =~ s/:/,/;
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--cert') {
        if($ARGV[1]) {
            $cert = $ARGV[1];
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--logfile') {
        if($ARGV[1]) {
            $logfile = $ARGV[1];
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--logdir') {
        if($ARGV[1]) {
            $logdir = $ARGV[1];
            shift @ARGV;
        }
    }
    elsif($ARGV[0] eq '--conf') {
        if($ARGV[1]) {
            $conf = $ARGV[1];
            shift @ARGV;
        }
    }
    else {
        print STDERR "\nWarning: http3-server.pl unknown parameter: '$ARGV[0]'\n";
    }
    shift @ARGV;
}

my $certfile = abs_path("certs/$cert.pem");
my $keyfile = abs_path("certs/$cert.key");

my $cmdline = "$nghttpx --http2-proxy --backend=$connect ".
    "--backend-keep-alive-timeout=500ms ".
    "--frontend=\"*,$listenport\" ".
    "--frontend=\"*,$listenport;quic\" ".
    "--log-level=INFO ".
    "--pid-file=$pidfile ".
    "--errorlog-file=$logfile ".
    "--conf=$conf ".
    "$keyfile $certfile";
print "RUN: $cmdline\n" if($verbose);
exec("exec $cmdline 2>$dev_null");
