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Annotation of loncom/auth/lonuploadedacc.pm, revision 1.14

1.1       www         1: # The LearningOnline Network
                      2: # Access Handler for User Files
                      3: #
1.14    ! jms         4: # $Id: lonuploadedacc.pm,v 1.13 2006/07/17 17:34:46 albertel Exp $
1.1       www         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: 
1.14    ! jms        29: =head1 NAME
        !            30: 
        !            31: Apache::lonuploadedacc
        !            32: 
        !            33: =head1 SYNOPSIS
        !            34: 
        !            35: The way this is supposed to work:
        !            36: 
        !            37:  User A has client machine C 
        !            38:  User A is logged into LON-CAPA server S
        !            39:  needs file from user B
        !            40:  homeserver for user B is H
        !            41: 
        !            42: This is part of the LearningOnline Network with CAPA project
        !            43: described at http://www.lon-capa.org.
        !            44: 
        !            45: =head1 HANDLER SUBROUTINE
        !            46: 
        !            47: This handler runs on H
        !            48: To access a userfile:
        !            49: Server S generates a token and puts it into the query string of URL for H
        !            50: Client box C asks H for file with token issued by C
        !            51: H now must ask S if token is valid, uses S's lond-command tokenauthuserfile
        !            52: 
        !            53: =cut
        !            54: 
1.1       www        55: package Apache::lonuploadedacc;
                     56: 
1.7       www        57: 
1.1       www        58: use strict;
1.10      albertel   59: use Apache::Constants qw(:common :http);
1.12      albertel   60: use Apache::lonnet;
1.1       www        61: 
                     62: sub handler {
                     63:     my $r = shift;
1.2       www        64:     my $args=$r->args;
1.7       www        65:     &Apache::loncommon::get_unprocessed_cgi($args,['token','tokenissued']); 
1.11      albertel   66:     my (undef,undef,$udom,$uname,$ufile)=split(/\//,$r->uri,5);
1.2       www        67:     $ufile=~s/^[\~\.]+//;
1.12      albertel   68:     my $remoteserver=$env{'form.tokenissued'};
1.2       www        69:     my $reply=&Apache::lonnet::reply('tokenauthuserfile:'.
1.12      albertel   70:                  $udom.'/'.$uname.'/'.$ufile.':'.$env{'form.token'},
1.4       albertel   71: 				     $remoteserver);
1.2       www        72:     if ($reply eq 'ok') {
                     73:        return OK;
1.10      albertel   74:    } elsif ($reply eq 'con_lost' || $reply eq 'no_such_host') {
1.12      albertel   75:        &Apache::lonnet::logthis("Server unavailable for userfile access $uname at $udom for $ufile with $remoteserver token $env{'form.token'}: $reply");
1.10      albertel   76:        return HTTP_SERVICE_UNAVAILABLE;
1.2       www        77:    } else {
1.12      albertel   78:        &Apache::lonnet::logthis("Refused userfile access $uname at $udom for $ufile with $remoteserver token $env{'form.token'}: $reply");
1.2       www        79:        return FORBIDDEN;
                     80:    }
1.1       www        81: }
                     82: 
1.13      albertel   83: sub skip_phase {
                     84:     return OK;
                     85: }
                     86: 
1.1       www        87: 1;
                     88: __END__
                     89: 
                     90: 
                     91: 
                     92: 
                     93: 
                     94: 
                     95: