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Annotation of loncom/auth/blockedaccess.pm, revision 1.6

1.1       raeburn     1: # The LearningOnline Network
                      2: # Information about blocking status for Portfolio files
                      3: #
1.6     ! raeburn     4: # $Id: blockedaccess.pm,v 1.5 2020/09/28 00:10:27 raeburn Exp $
1.3       bisitz      5: #
1.1       raeburn     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::blockedaccess;
                     30: 
                     31: use strict;
1.5       raeburn    32: use Apache::Constants qw(:common);
1.1       raeburn    33: use Apache::lonnet;
                     34: use Apache::loncommon();
                     35: use Apache::lonlocal;
1.5       raeburn    36: use HTML::Entities();
1.1       raeburn    37: 
                     38: sub handler {
                     39:     my $r = shift;
                     40:     &Apache::loncommon::content_type($r,'text/html');
                     41:     $r->send_http_header;
                     42:     return OK if $r->header_only;
                     43: 
                     44:     &Apache::lonlocal::get_language_handle($r);
1.6     ! raeburn    45:     my $ver_origurl = $r->uri;
1.5       raeburn    46:     my $origurl = &Apache::lonnet::deversion($r->uri);
1.4       raeburn    47:     my ($blocked,$blocktext);
                     48: 
                     49:     if (&Apache::lonnet::is_portfolio_url($origurl)) {
                     50:         my ($type,$udom,$uname,$file_name,$group) = 
                     51: 	    &Apache::lonnet::parse_portfolio_url($origurl);
                     52:         ($blocked,$blocktext) = 
                     53:             &Apache::loncommon::blocking_status('port',$uname,$udom);
                     54:     } else {
                     55:         if ($env{'request.course.id'}) {
                     56:             my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
                     57:             my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1.5       raeburn    58:             my $symb = $env{'request.symb'};
1.6     ! raeburn    59:             my $url = $origurl;
        !            60:             # If no symb, and url is on not map, check for referrer
        !            61:             unless (($symb) || &Apache::lonnet::is_on_map($url) || ($origurl eq '/adm/blockedaccess'))  {
        !            62:                 my $refuri = $env{'httpref.'.$origurl} || $env{'httpref.'.$ver_origurl};
        !            63:                 if ($refuri) {
        !            64:                     $url = $refuri;
        !            65:                 }
        !            66:             }
1.4       raeburn    67:             ($blocked,$blocktext) =
1.6     ! raeburn    68:                 &Apache::loncommon::blocking_status('docs',$cnum,$cdom,$url,1,$symb,'blockedaccess');
1.4       raeburn    69:         }
                     70:     }
1.1       raeburn    71:     if ($blocked) {
                     72:         $r->print(&Apache::loncommon::start_page('Access Temporarily Blocked'));
                     73:         $r->print($blocktext);
1.5       raeburn    74:     } elsif ($origurl eq '/adm/blockedaccess') {
                     75:         $r->print(&Apache::loncommon::start_page('Access Blocking Information'));
                     76:         $r->print('<p class="LC_warning">'.&mt('Could not determine which page had access blocked.').'</p>');
1.1       raeburn    77:     } else {
1.5       raeburn    78:         $r->print(&Apache::loncommon::start_page('Access Blocking Information'));
                     79:         my $link;
                     80:         if ($origurl ne '') {
                     81:             my $showurl = &Apache::lonenc::check_encrypt($origurl);
                     82:             $link = &Apache::lonnet::absolute_url().$showurl;
                     83:             if ($r->args ne '') {
                     84:                 $link .= '?'.$r->args;
                     85:             }
                     86:         }
                     87:         $r->print('<p class="LC_info">'.
                     88:                   &mt('The page you are trying to reach was reported as having access blocked, but the reason is not available.').
                     89:                   '</p>');
                     90:         if ($link) {
                     91:             $r->print('<p><a href="'.&HTML::Entities::encode($link,'\'"<>&').'">'.&mt('Try again?').'</a></p>');
                     92:         }
1.1       raeburn    93:     }
                     94:     $r->print(&Apache::loncommon::end_page());
                     95:     return OK;
                     96: }
                     97: 
                     98: sub setup_handler {
                     99:     my ($r) = @_;
                    100:     $r->set_handlers('PerlHandler'=>
                    101:                      [\&Apache::blockedaccess::handler]);
                    102:     $r->handler('perl-script');
                    103: }
                    104: 
                    105: 1;