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# Copyright (c) 2025, PostgreSQL Global Development Group
=pod
=head1 NAME
OAuth::Server - runs a mock OAuth authorization server for testing
=head1 SYNOPSIS
use OAuth::Server;
my $server = OAuth::Server->new();
$server->run;
my $port = $server->port;
my $issuer = "http://127.0.0.1:$port";
# test against $issuer...
$server->stop;
=head1 DESCRIPTION
This is glue API between the Perl tests and the Python authorization server
daemon implemented in t/oauth_server.py. (Python has a fairly usable HTTP server
in its standard library, so the implementation was ported from Perl.)
This authorization server does not use TLS (it implements a nonstandard, unsafe
issuer at "http://127.0.0.1:<port>"), so libpq in particular will need to set
PGOAUTHDEBUG=UNSAFE to be able to talk to it.
=cut
package OAuth::Server;
use warnings;
use strict;
use Scalar::Util;
use Test::More;
=pod
=head1 METHODS
=over
=item OAuth::Server->new()
Create a new OAuth Server object.
=cut
sub new
{
my $class = shift;
my $self = {};
bless($self, $class);
return $self;
}
=pod
=item $server->port()
Returns the port in use by the server.
=cut
sub port
{
my $self = shift;
return $self->{'port'};
}
=pod
=item $server->run()
Runs the authorization server daemon in t/oauth_server.py.
=cut
sub run
{
my $self = shift;
my $port;
my $pid = open(my $read_fh, "-|", $ENV{PYTHON}, "t/oauth_server.py")
or die "failed to start OAuth server: $!";
# Get the port number from the daemon. It closes stdout afterwards; that way
# we can slurp in the entire contents here rather than worrying about the
# number of bytes to read.
$port = do { local $/ = undef; <$read_fh> }
// die "failed to read port number: $!";
chomp $port;
die "server did not advertise a valid port"
unless Scalar::Util::looks_like_number($port);
$self->{'pid'} = $pid;
$self->{'port'} = $port;
$self->{'child'} = $read_fh;
note("OAuth provider (PID $pid) is listening on port $port\n");
}
=pod
=item $server->stop()
Sends SIGTERM to the authorization server and waits for it to exit.
=cut
sub stop
{
my $self = shift;
note("Sending SIGTERM to OAuth provider PID: $self->{'pid'}\n");
kill(15, $self->{'pid'});
$self->{'pid'} = undef;
# Closing the popen() handle waits for the process to exit.
close($self->{'child'});
$self->{'child'} = undef;
}
=pod
=back
=cut
1;
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