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File:  [LON-CAPA] / loncom / auth / lonuploadedacc.pm
Revision 1.15: download - view: text, annotated - select for diffs
Thu Nov 20 15:19:22 2008 UTC (15 years, 5 months ago) by jms
Branches: MAIN
CVS tags: version_2_9_X, version_2_9_99_0, version_2_9_1, version_2_9_0, version_2_8_99_1, version_2_8_99_0, version_2_11_1, version_2_11_0_RC3, version_2_11_0_RC2, version_2_11_0_RC1, version_2_11_0, version_2_10_X, version_2_10_1, version_2_10_0_RC2, version_2_10_0_RC1, version_2_10_0, loncapaMITrelate_1, language_hyphenation_merge, language_hyphenation, bz6209-base, bz6209, bz5969, bz2851, PRINT_INCOMPLETE_base, PRINT_INCOMPLETE, HEAD, GCI_3, GCI_2, BZ5971-printing-apage, BZ5434-fox, BZ4492-merge, BZ4492-feature_horizontal_radioresponse, BZ4492-feature_Support_horizontal_radioresponse, BZ4492-Support_horizontal_radioresponse
Moved POD comments to bottom of file

# The LearningOnline Network
# Access Handler for User Files
#
# $Id: lonuploadedacc.pm,v 1.15 2008/11/20 15:19:22 jms Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#



package Apache::lonuploadedacc;


use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;

sub handler {
    my $r = shift;
    my $args=$r->args;
    &Apache::loncommon::get_unprocessed_cgi($args,['token','tokenissued']); 
    my (undef,undef,$udom,$uname,$ufile)=split(/\//,$r->uri,5);
    $ufile=~s/^[\~\.]+//;
    my $remoteserver=$env{'form.tokenissued'};
    my $reply=&Apache::lonnet::reply('tokenauthuserfile:'.
                 $udom.'/'.$uname.'/'.$ufile.':'.$env{'form.token'},
				     $remoteserver);
    if ($reply eq 'ok') {
       return OK;
   } elsif ($reply eq 'con_lost' || $reply eq 'no_such_host') {
       &Apache::lonnet::logthis("Server unavailable for userfile access $uname at $udom for $ufile with $remoteserver token $env{'form.token'}: $reply");
       return HTTP_SERVICE_UNAVAILABLE;
   } else {
       &Apache::lonnet::logthis("Refused userfile access $uname at $udom for $ufile with $remoteserver token $env{'form.token'}: $reply");
       return FORBIDDEN;
   }
}

sub skip_phase {
    return OK;
}

1;
__END__



=head1 NAME

Apache::lonuploadedacc

=head1 SYNOPSIS

The way this is supposed to work:

 User A has client machine C 
 User A is logged into LON-CAPA server S
 needs file from user B
 homeserver for user B is H

This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.

=head1 HANDLER SUBROUTINE

This handler runs on H
To access a userfile:
Server S generates a token and puts it into the query string of URL for H
Client box C asks H for file with token issued by C
H now must ask S if token is valid, uses S's lond-command tokenauthuserfile

=cut
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