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Annotation of loncom/auth/lonipcheck.pm, revision 1.1

1.1     ! raeburn     1: # Checks IP access settings - disable subsequent PerlHandlers if client IP blocked
        !             2: # $Id: lonipcheck.pm,v 1.1 2008/09/05 13:30:34 raeburn Exp $
        !             3: #
        !             4: # Copyright Michigan State University Board of Trustees
        !             5: #
        !             6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
        !             7: #
        !             8: # LON-CAPA is free software; you can redistribute it and/or modify
        !             9: # it under the terms of the GNU General Public License as published by
        !            10: # the Free Software Foundation; either version 2 of the License, or
        !            11: # (at your option) any later version.
        !            12: #
        !            13: # LON-CAPA is distributed in the hope that it will be useful,
        !            14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16: # GNU General Public License for more details.
        !            17: #
        !            18: # You should have received a copy of the GNU General Public License
        !            19: # along with LON-CAPA; if not, write to the Free Software
        !            20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
        !            21: #
        !            22: # /home/httpd/html/adm/gpl.txt
        !            23: #
        !            24: # http://www.lon-capa.org/
        !            25: #
        !            26: 
        !            27: use strict;
        !            28: package Apache::lonipcheck;
        !            29: use Apache::lonnet;
        !            30: use Apache::lonlocal;
        !            31: use Apache::loncommon();
        !            32: use Apache::Constants qw(:common :http :methods);
        !            33: 
        !            34: sub ip_access_check {
        !            35:     my $symb=$env{'request.symb'};
        !            36:     if ($env{'request.state'} ne "construct") {
        !            37:         my $idacc = &Apache::lonnet::EXT('resource.0.acc',$symb);
        !            38:         my $allowed=&Apache::loncommon::check_ip_acc($idacc);
        !            39:         if (!$allowed) {
        !            40:             return('INVALID_ACCESS',
        !            41:                    '<h1>'.&mt('Not open to be viewed').'</h1>'.
        !            42:                    &mt("This resource can not be accessed from your location."));
        !            43: 
        !            44:         }
        !            45:     }
        !            46:     return ('OPEN');
        !            47: }
        !            48: 
        !            49: sub handler {
        !            50:     my ($r)=@_;
        !            51:     if (&Apache::lonnet::allowed('bre',$r->uri) eq 'F') {
        !            52: 	return DECLINED;
        !            53:     }
        !            54:     my ($status,$msg)=&ip_access_check();
        !            55:     if ($status ne 'OPEN') {
        !            56: 	$r->set_handlers('PerlHandler'=>undef);
        !            57: 	&Apache::loncommon::content_type($r,'text/html');
        !            58: 	$r->send_http_header;
        !            59: 	return OK if $r->header_only;
        !            60: 	my $start_page =
        !            61: 	    &Apache::loncommon::start_page('Not Open',undef,
        !            62: 					   {'bgcolor'        => '#FFFFFF',
        !            63: 					    'force_register' => 1,});
        !            64: 	my $end_page = &Apache::loncommon::end_page();
        !            65: 	$r->print($start_page.$msg.$end_page);
        !            66: 
        !            67: 	return OK;
        !            68:     }
        !            69:     return DECLINED;
        !            70: }
        !            71: 1;