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# Apache2 FastCGI client to query remote LL::NG FastCGI server
#
package Lemonldap::NG::SSOaaS::Apache::Client;
use strict;
use Apache2::Connection;
use Apache2::RequestUtil;
use Apache2::RequestRec;
use Apache2::Const -compile =>
qw(FORBIDDEN HTTP_UNAUTHORIZED REDIRECT OK DECLINED DONE SERVER_ERROR AUTH_REQUIRED HTTP_SERVICE_UNAVAILABLE);
use Apache2::Log;
use APR::Table;
use IO::Socket::INET;
use FCGI::Client;
use URI;
use URI::Escape qw(uri_unescape);
use constant FORBIDDEN => Apache2::Const::FORBIDDEN;
use constant HTTP_UNAUTHORIZED => Apache2::Const::HTTP_UNAUTHORIZED;
use constant REDIRECT => Apache2::Const::REDIRECT;
use constant DECLINED => Apache2::Const::DECLINED;
use constant SERVER_ERROR => Apache2::Const::SERVER_ERROR;
our $VERSION = '2.18.0';
sub handler {
my ( $class, $r ) = @_;
$r ||= $class;
my ( $uri, $args ) = ( $r->uri, $r->args );
my $uri_full = $uri . ( $args ? "?$args" : '' );
my $env = {
#%ENV,
HTTP_HOST => $r->hostname,
REMOTE_ADDR => (
$r->connection->can('remote_ip')
? $r->connection->remote_ip
: $r->connection->client_ip
),
QUERY_STRING => $args,
REQUEST_URI => $uri_full,
PATH_INFO => '',
SERVER_PORT => $r->get_server_port,
REQUEST_METHOD => $r->method,
};
foreach (qw(VHOSTTYPE RULES_URL HTTPS_REDIRECT PORT_REDIRECT)) {
if ( my $t = $r->dir_config($_) ) {
$env->{$_} = $t;
}
}
$r->headers_in->do(
sub {
my $h = shift;
my $k = uc($h);
if ( $k ne 'HOST' ) {
$k =~ s/-/_/g;
$env->{"HTTP_$k"} = $r->headers_in->{$h};
}
return 1;
}
);
$uri = URI->new( "http://" . $r->hostname . $r->unparsed_uri );
$env->{PATH_INFO} = uri_unescape( $uri->path );
my ( $host, $port ) = ( $r->dir_config('LLNG_SERVER') =~ /^(.*):(\d+)$/ );
unless ( $host and $port ) {
print STDERR 'Missing or bad LLNG_SERVER';
return SERVER_ERROR;
}
my $sock = IO::Socket::INET->new(
PeerAddr => $host,
PeerPort => $port,
) or die $!;
foreach ( keys %$env ) {
delete $env->{$_} unless ( length $env->{$_} );
}
my ( $stdout, $stderr, $status ) =
FCGI::Client::Connection->new( sock => $sock )->request($env);
my %hdrs =
map { m/(.*?):\s*(.*)/; } split /(?:\r?\n)+/, $stdout;
if ( $hdrs{Status} =~ /^(\d+)\s+(.*?)$/ ) {
$status = $1;
}
else {
print STDERR "Bad status line $hdrs{Status}\n";
return SERVER_ERROR;
}
if ( ( $status == 302 or $status == 401 ) and $hdrs{Location} ) {
$r->err_headers_out->set( Location => $hdrs{Location} );
return REDIRECT;
}
$r->user( $hdrs{'Lm-Remote-User'} ) if $hdrs{'Lm-Remote-User'};
$r->subprocess_env( REMOTE_CUSTOM => $hdrs{'Lm-Remote-Custom'} )
if $hdrs{'Lm-Remote-Custom'};
my $i = 1;
while ( $hdrs{"Headername$i"} ) {
$r->headers_in->set( $hdrs{"Headername$i"} => $hdrs{"Headervalue$i"} )
if $hdrs{"Headervalue$i"};
$i++;
}
$status = DECLINED if ( $status < 300 );
return $status;
}
1;
__END__
=pod
=encoding utf8
=head1 NAME
Lemonldap::NG::SSOaaS::Apache::Client - Apache client for Lemonldap::NG
FastCGI server.
=head1 SYNOPSIS
In apache2.conf:
<VirtualHost ...>
PerlHeaderParserHandler Lemonldap::NG::SSOaaS::Apache::Client
PerlSetVar LLNG_SERVER 127.0.0.1:9090
PerlSetVar VHOSTTYPE DevOps
# or PerlSetVar VHOSTTYPE DevOpsST
PerlSetVar HOST HTTP_HOST
PerlSetVar HTTPS_REDIRECT HTTPS
PerlSetVar PORT_REDIRECT SERVER_PORT
PerlSetVar RULES_URL http://app.tld/rules.json
...
</VirtualHost>
=head1 DESCRIPTION
Lemonldap::NG::SSOaaS::Apache::Client is an alternative to
L<Lemonldap::NG::Handler::ApacheMP2> that replace inside handler. It calls a
remote Lemonldap::NG FastCGI server to get authentication, authorization and
headers.
=head1 SEE ALSO
L<Lemonldap::NG::Handler::ApacheMP2>,
L<https://lemonldap-ng.org/documentation/latest/ssoaas>
=head1 AUTHORS
=over
=item LemonLDAP::NG team L<https://lemonldap-ng.org/team.html>
=back
=head1 BUG REPORT
Use OW2 system to report bug or ask for features:
L<https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues>
=head1 DOWNLOAD
Lemonldap::NG is available at
L<https://lemonldap-ng.org/download.html>
=head1 COPYRIGHT AND LICENSE
See COPYING file for details.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see L<http://www.gnu.org/licenses/>.
=cut
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