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

1.1     ! raeburn     1: # The LearningOnline Network
        !             2: # Information about deep-link only access for a resource
        !             3: #
        !             4: # $Id: lonprotected.pm,v 1.1 2019/01/20 20:10:47 raeburn Exp $
        !             5: #
        !             6: # Copyright Michigan State University Board of Trustees
        !             7: #
        !             8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
        !             9: #
        !            10: # LON-CAPA is free software; you can redistribute it and/or modify
        !            11: # it under the terms of the GNU General Public License as published by
        !            12: # the Free Software Foundation; either version 2 of the License, or
        !            13: # (at your option) any later version.
        !            14: #
        !            15: # LON-CAPA is distributed in the hope that it will be useful,
        !            16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            18: # GNU General Public License for more details.
        !            19: #
        !            20: # You should have received a copy of the GNU General Public License
        !            21: # along with LON-CAPA; if not, write to the Free Software
        !            22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
        !            23: #
        !            24: # /home/httpd/html/adm/gpl.txt
        !            25: #
        !            26: # http://www.lon-capa.org/
        !            27: #
        !            28: 
        !            29: package Apache::lonprotected
        !            30: 
        !            31: use strict;
        !            32: use Apache::Constants qw(:common :http REDIRECT);
        !            33: use Apache::lonnet;
        !            34: use Apache::loncommon();
        !            35: use Apache::lonlocal;
        !            36: 
        !            37: sub handler {
        !            38:     my $r = shift;
        !            39:     &Apache::loncommon::content_type($r,'text/html');
        !            40:     $r->send_http_header;
        !            41:     return OK if $r->header_only;
        !            42: 
        !            43:     &Apache::lonlocal::get_language_handle($r);
        !            44:     my $origurl = $r->uri;
        !            45: 
        !            46:     my ($blocktext,$title);
        !            47:     if ($origurl eq '/adm/protected') {
        !            48:         $blocktext = '<div>'.
        !            49:                      &mt('This page is displayed when access is blocked to course/community content, in the case where access via a deep-link is required.').
        !            50:                      '<br />'.&mt("The restriction to access via a deep-link which can be set for specific content or a folder in a course does not apply to course personnel with elevated privileges in the course.").
        !            51:                      '<div>';
        !            52:         $title = 'Access Information';
        !            53:     } elsif ($env{'request.course.id'}) {
        !            54:         my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
        !            55:         my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
        !            56:         $blocktext = '<h2>'.&mt('Access denied').'</h2>'."\n".
        !            57:                      '<div>'.
        !            58:                      &mt('The resource you are trying to display must be accessed via a link to the resource from a web page external to LON-CAPA ').
        !            59:                      '</div>';
        !            60:        $title = 'Access Blocked';
        !            61:     } else {
        !            62:         my $server = &Apache::lonnet::absolute_url();
        !            63:         $r->header_out(Location => $server.$origurl);
        !            64:         return REDIRECT;
        !            65:     }
        !            66:     $r->print(&Apache::loncommon::start_page($title));
        !            67:     $r->print($blocktext);
        !            68:     $r->print(&Apache::loncommon::end_page());
        !            69:     return OK;
        !            70: }
        !            71: 
        !            72: sub setup_handler {
        !            73:     my ($r) = @_;
        !            74:     $r->set_handlers('PerlHandler'=>
        !            75:                      [\&Apache::lonprotected::handler]);
        !            76:     $r->handler('perl-script');
        !            77: }
        !            78: 
        !            79: 1;