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- Bug 6754 LON-CAPA as LTI Consumer
  Support for access control using slots, and also for time interval
  for external tools set to be "gradable".

    1: # Checks IP access settings - disable subsequent PerlHandlers if client IP blocked
    2: # $Id: lonipcheck.pm,v 1.2 2017/12/22 02:00:53 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',$r->uri) eq 'F') {
   52: 	return DECLINED;
   53:     }
   54:     if (($r->uri =~ /ext\.tool$/) &&
   55:         (&Apache::lonnet::EXT('resource.0.gradable',$env{'request.symb'}) =~ /^yes$/i)) {
   56:         return DECLINED;
   57:     }
   58:     my ($status,$msg)=&ip_access_check();
   59:     if ($status ne 'OPEN') {
   60: 	$r->set_handlers('PerlHandler'=>undef);
   61: 	&Apache::loncommon::content_type($r,'text/html');
   62: 	$r->send_http_header;
   63: 	return OK if $r->header_only;
   64: 	my $start_page =
   65: 	    &Apache::loncommon::start_page('Not Open',undef,
   66: 					   {'bgcolor'        => '#FFFFFF',
   67: 					    'force_register' => 1,});
   68: 	my $end_page = &Apache::loncommon::end_page();
   69: 	$r->print($start_page.$msg.$end_page);
   70: 
   71: 	return OK;
   72:     }
   73:     return DECLINED;
   74: }
   75: 1;