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- Bug 6907
  Value of deeplink parameter in effect for session launched via deep-link
  determines if "Exit Tool" button is present in inline menu, the text used
  for the button and whether redirect to a URL can occur when pushed.

    1: # The LearningOnline Network
    2: # Re-launch guidance for deep linked access with username mismatch
    3: #
    4: # $Id: lonlinkexit.pm,v 1.2 2022/07/07 15:28:08 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::lonlinkexit;
   30: 
   31: use strict;
   32: use lib '/home/httpd/lib/perl/';
   33: use Apache::Constants qw(:common);
   34: use Apache::lonnet;
   35: use Apache::loncommon;
   36: use Apache::lonnavmaps;
   37: use Apache::lonlocal;
   38: use LONCAPA;
   39: use CGI::Cookie();
   40: 
   41: sub handler {
   42:     my $r = shift;
   43: 
   44:     my $handle = &Apache::lonnet::check_for_valid_session($r);
   45:     my ($exiturl,$deeplinktarget);
   46:     if ($handle ne '') {
   47:         my $lonidsdir=$r->dir_config('lonIDsDir');
   48:         &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   49:         if ($env{'request.deeplink.login'}) {
   50:             if ($env{'request.deeplink.target'} ne '') {
   51:                 $deeplinktarget = $env{'request.deeplink.target'};
   52:             }
   53:             if ($env{'request.course.id'}) { 
   54:                 my ($deeplink_symb,$deeplink);
   55:                 my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
   56:                 my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
   57:                 if (($cnum ne '') && ($cdom ne '')) {
   58:                     $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
   59:                     if ($deeplink_symb) {
   60:                         if ($deeplink_symb =~ /\.(page|sequence)$/) {
   61:                             my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($deeplink_symb))[2]);
   62:                             my $navmap = Apache::lonnavmaps::navmap->new();
   63:                             if (ref($navmap)) {
   64:                                 $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
   65:                             }
   66:                         } else {
   67:                             $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$deeplink_symb);
   68:                         }
   69:                         if ($deeplink ne '') {
   70:                             my ($state,$others,$listed,$scope,$protect,$display,$target,$exit) = split(/,/,$deeplink);
   71:                             if ($exit) {
   72:                                 my ($show,$text) = split(/:/,$exit);
   73:                                 if ($show eq 'url') {
   74:                                     if ($env{'request.linkprotexit'} =~ m{^https?://}) {
   75:                                         $exiturl = $env{'request.linkprotexit'};
   76:                                         &js_escape(\$exiturl);
   77:                                     }
   78:                                 }
   79:                             }
   80:                         }
   81:                     }
   82:                 }
   83:             }
   84:         }
   85:         if (unlink("$lonidsdir/$handle.id")) {
   86:             if (($env{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
   87:                 (-l "$lonidsdir/$env{'user.linkedenv'}.id") &&
   88:                 (readlink("$lonidsdir/$env{'user.linkedenv'}.id") eq "$lonidsdir/$handle.id")) {
   89:                 unlink("$lonidsdir/$env{'user.linkedenv'}.id");
   90:             }
   91:         }
   92:         my %temp=('logout' => time);
   93:         my $ip = &Apache::lonnet::get_requestor_ip();
   94:         &Apache::lonnet::put('email_status',\%temp);
   95:         &Apache::lonnet::log($env{'user.domain'},
   96:                              $env{'user.name'},
   97:                              $env{'user.home'},
   98:                              "Logout $ip");
   99:         #expire the cookies
  100:         my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
  101:         foreach my $name (keys(%cookies)) {
  102:             next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
  103:             my $c = new CGI::Cookie(-name    => $name,
  104:                                     -value   => '',
  105:                                     -expires => '-10y',);
  106:             $r->headers_out->add('Set-cookie' => $c);
  107:         }
  108:     }
  109:     if (!$Apache::lonlocal::lh) {
  110:         &Apache::lonlocal::get_language_handle($r);
  111:     }
  112:     &Apache::loncommon::content_type($r,'text/html');
  113:     $r->send_http_header;
  114:     return OK if $r->header_only;
  115: 
  116:     my ($msg,$js);
  117:     $msg = '<p>'.&mt('Expired any existing session').'</p>';
  118:     my $args = {'only_body' => 1};
  119:     if ($exiturl) {
  120:         $js = <<ENDJS;
  121: <script type="text/javascript">
  122: // <![CDATA[
  123: \$(document).ready( function() {
  124:     setTimeout(function() {
  125:         if (window.self !== window.top) {
  126:             window.top.location.href = '$exiturl';
  127:         } else {
  128:             document.location.href = '$exiturl';
  129:         }
  130:     },100);
  131: });
  132: // ]]>
  133: </script>
  134: ENDJS
  135:         $msg .= '<p>'.&mt('Redirecting ...').'</p>';
  136:     }
  137: 
  138:     $r->print(&Apache::loncommon::start_page('Session removed',$js,{'only_body' => 1}));
  139:     $r->print($msg);
  140:     $r->print(&Apache::loncommon::end_page());
  141:     return OK;
  142: }
  143: 
  144: 1;