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Initialize language handle

    1: # The LearningOnline Network
    2: # Cookie Based Access Handler for Construction Area
    3: # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)
    4: #
    5: # $Id: loncacc.pm,v 1.30 2003/09/16 18:15:43 www Exp $
    6: #
    7: # Copyright Michigan State University Board of Trustees
    8: #
    9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   10: #
   11: # LON-CAPA is free software; you can redistribute it and/or modify
   12: # it under the terms of the GNU General Public License as published by
   13: # the Free Software Foundation; either version 2 of the License, or
   14: # (at your option) any later version.
   15: #
   16: # LON-CAPA is distributed in the hope that it will be useful,
   17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   19: # GNU General Public License for more details.
   20: #
   21: # You should have received a copy of the GNU General Public License
   22: # along with LON-CAPA; if not, write to the Free Software
   23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   24: #
   25: # /home/httpd/html/adm/gpl.txt
   26: #
   27: # http://www.lon-capa.org/
   28: #
   29: # YEAR=2000
   30: # 6/15,16/11,22/11,
   31: # YEAR=2001
   32: # 01/06,01/11,6/1,9/25,9/28,11/22,12/25,12/26,
   33: # 01/06/01,05/04,05/05,05/09 Gerd Kortemeyer
   34: # YEAR=2002
   35: # 1/4 Gerd Kortemeyer
   36: ###
   37: 
   38: package Apache::loncacc;
   39: 
   40: use strict;
   41: use Apache::Constants qw(:common :http :methods REDIRECT);
   42: use Apache::File;
   43: use CGI::Cookie();
   44: use Fcntl qw(:flock);
   45: use Apache::lonlocal;
   46: 
   47: sub constructaccess {
   48:     my ($url,$ownerdomain)=@_;
   49:     my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)/);
   50:     unless (($ownername) && ($ownerdomain)) { return ''; }
   51:     # We do not allow editing of previous versions of files.
   52:     if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
   53:     if (($ownername eq $ENV{'user.name'}) &&
   54:         ($ownerdomain eq $ENV{'user.domain'})) {
   55: 	return ($ownername,$ownerdomain);
   56:     }
   57: 
   58:     my $capriv='user.priv.ca./'.
   59:                $ownerdomain.'/'.$ownername.'./';
   60:     foreach (keys %ENV) {
   61:         if ($_ eq $capriv) {
   62:            return ($ownername,$ownerdomain);
   63:         }
   64:     }
   65:     return '';
   66: }
   67: 
   68: sub handler {
   69:     my $r = shift;
   70:     my $requrl=$r->uri;
   71:     $ENV{'request.editurl'}=$requrl;
   72:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   73:     my $lonid=$cookies{'lonID'};
   74:     my $cookie;
   75:     if ($lonid) {
   76: 	my $handle=$lonid->value;
   77:         $handle=~s/\W//g;
   78:         my $lonidsdir=$r->dir_config('lonIDsDir');
   79:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
   80: 
   81: # ------------------------------------------------------ Initialize Environment
   82: 
   83:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   84: 
   85: # --------------------------------------------------------- Initialize Language
   86:  
   87:  	    &Apache::lonlocal::get_language_handle();
   88: 
   89: # -------------------------------------------------------------- Resource State
   90: 
   91:             $ENV{'request.state'}    = "construct";
   92:             $ENV{'request.filename'} = $r->filename;
   93: 
   94:             unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {
   95:                 $r->log_reason("Unauthorized $requrl", $r->filename); 
   96: 	        return HTTP_NOT_ACCEPTABLE;
   97:             }
   98: # Construction space needs Remote to work
   99:             if ($ENV{'environment.remote'} eq 'off') {
  100: 	        $r->content_type('text/html');
  101:                 $r->header_out(Location => 
  102:                     'http://'.$r->server->server_hostname.
  103:                     '/adm/remote?action=launch&url='.
  104:                     &Apache::lonnet::escape($requrl));
  105:                 return REDIRECT;
  106:             }
  107: 
  108: # -------------------------------------------------------- Load POST parameters
  109: 
  110: 	    &Apache::loncommon::get_posted_cgi($r);
  111: 
  112:             return OK; 
  113:         } else { 
  114:             $r->log_reason("Cookie $handle not valid", $r->filename) 
  115:         };
  116:     }
  117: 
  118: # ----------------------------------------------- Store where they wanted to go
  119: 
  120:     $ENV{'request.firsturl'}=$requrl;
  121:     return FORBIDDEN;
  122: }
  123: 
  124: 1;
  125: __END__
  126: 
  127: =head1 NAME
  128: 
  129: Apache::lonacc - Cookie Based Access Handler for Construction Area
  130: 
  131: =head1 SYNOPSIS
  132: 
  133: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
  134: 
  135:  PerlAccessHandler       Apache::loncacc
  136: 
  137: =head1 INTRODUCTION
  138: 
  139: This module enables cookie based authentication for construction area
  140: and is used to control access for three (essentially equivalent) URIs.
  141: 
  142:  <LocationMatch "^/priv.*">
  143:  <LocationMatch "^/\~.*">
  144:  <LocationMatch "^/\~.*/$">
  145: 
  146: Whenever the client sends the cookie back to the server, 
  147: if the cookie is missing or invalid, the user is re-challenged
  148: for login information.
  149: 
  150: This is part of the LearningOnline Network with CAPA project
  151: described at http://www.lon-capa.org.
  152: 
  153: =head1 HANDLER SUBROUTINE
  154: 
  155: This routine is called by Apache and mod_perl.
  156: 
  157: =over 4
  158: 
  159: =item *
  160: 
  161: load POST parameters
  162: 
  163: =item *
  164: 
  165: store where they wanted to go (first url entered)
  166: 
  167: =back
  168: 
  169: =head1 OTHERSUBROUTINES
  170: 
  171: =over 4
  172: 
  173: =item *
  174: 
  175: constructaccess($url,$ownerdomain) : See if the owner domain and name
  176: in the URL match those in the expected environment.  If so, return 
  177: two element list ($ownername,$ownerdomain).  Else, return null string.
  178: 
  179: =back
  180: 
  181: =cut
  182: 
  183: 
  184: 
  185: 
  186: 
  187: 
  188: