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- Somewhat amazed at how easy this was should with these changes
   - uploaded .html/.page (all ssi type docs) now
       - get parsed
       - can be printed
       - get default parameters
       - are no longer wrapper ed

- .problems are still somewhat issue oriented though (need real metadata support for uploaded)

    1: # The LearningOnline Network
    2: # Cookie Based Access Handler
    3: #
    4: # $Id: lonacc.pm,v 1.51 2004/04/23 23:01:36 albertel 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: # YEAR=1999
   29: # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11,
   30: # YEAR=2000
   31: # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6,
   32: # 12/25,12/26,
   33: # YEAR=2001
   34: # 01/06/01,05/28,8/11,9/26,11/29 Gerd Kortemeyer
   35: # YEAR=2002
   36: # 1/4,2/25 Gerd Kortemeyer
   37: #
   38: ###
   39: 
   40: package Apache::lonacc;
   41: 
   42: use strict;
   43: use Apache::Constants qw(:common :http :methods);
   44: use Apache::File;
   45: use Apache::lonnet;
   46: use Apache::loncommon();
   47: use Apache::lonlocal;
   48: use CGI::Cookie();
   49: use Fcntl qw(:flock);
   50: 
   51: sub handler {
   52:     my $r = shift;
   53:     my $requrl=$r->uri;
   54:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   55:     my $lonid=$cookies{'lonID'};
   56:     my $cookie;
   57:     if ($lonid) {
   58: 	my $handle=$lonid->value;
   59:         $handle=~s/\W//g;
   60:         my $lonidsdir=$r->dir_config('lonIDsDir');
   61:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
   62: 
   63: # ------------------------------------------------------ Initialize Environment
   64: 
   65:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   66: 
   67: # --------------------------------------------------------- Initialize Language
   68: 
   69: 	    &Apache::lonlocal::get_language_handle($r);
   70: 
   71: # -------------------------------------------------------------- Resource State
   72: 
   73:             if ($requrl=~/^\/+(res|uploaded)\//) {
   74:                $ENV{'request.state'} = "published";
   75: 	    } else {
   76: 	       $ENV{'request.state'} = 'unknown';
   77:             }
   78:             $ENV{'request.filename'} = $r->filename;
   79:             $ENV{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
   80: # -------------------------------------------------------- Load POST parameters
   81: 
   82: 	    &Apache::loncommon::get_posted_cgi($r);
   83: 
   84: # ---------------------------------------------------------------- Check access
   85: 
   86:             if ($requrl!~/^\/adm|public|prtspool\//) {
   87: 		my $access=&Apache::lonnet::allowed('bre',$requrl);
   88:                 if ($access eq '1') {
   89: 		   $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
   90: 	           return HTTP_NOT_ACCEPTABLE; 
   91:                 }
   92:                 if (($access ne '2') && ($access ne 'F')) {
   93: 		   $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
   94: 	           return HTTP_NOT_ACCEPTABLE; 
   95:                 }
   96:             }
   97: 	    if ($requrl =~ m|^/prtspool/|) {
   98: 		my $start='/prtspool/'.$ENV{'user.name'}.'_'.
   99: 		    $ENV{'user.domain'};
  100: 		if ($requrl !~ /^\Q$start\E/) {
  101: 		    $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  102: 		    return HTTP_NOT_ACCEPTABLE;
  103: 		}
  104: 	    }
  105: # ------------------------------------------------------------- This is allowed
  106:           if ($ENV{'request.course.id'}) {
  107: 	    &Apache::lonnet::countacc($requrl);
  108:             $requrl=~/\.(\w+)$/;
  109:             if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
  110:  ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$)/) ||
  111:  ($requrl=~/^\/adm\/wrapper\//) ||
  112:  ($requrl=~/^\/public\/.*\/syllabus$/)) {
  113: # ------------------------------------- This is serious stuff, get symb and log
  114: 		my $query=$r->args;
  115:                 my $symb;
  116:                 if ($query) {
  117: 		    &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
  118:                 }
  119:                 if ($ENV{'form.symb'}) {
  120: 		    $symb=&Apache::lonnet::symbclean($ENV{'form.symb'});
  121:                     if (&Apache::lonnet::symbverify($symb,$requrl)) {
  122:                       my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
  123:                       &Apache::lonnet::symblist($map,$murl => $mid,
  124:                                                'last_known' => $murl);
  125: 		    } else {
  126: 			$r->log_reason('Invalid symb for '.$requrl.': '.
  127:                                        $symb);
  128: 		        $ENV{'user.error.msg'}=
  129:                                 "$requrl:bre:1:1:Invalid Access";
  130:   	                return HTTP_NOT_ACCEPTABLE; 
  131:                     }
  132:                 } else {
  133: 	            $symb=&Apache::lonnet::symbread($requrl);
  134:                     my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
  135: 		    &Apache::lonnet::symblist($map,$murl => $mid,
  136:                                               'last_known' => $murl);
  137:                 }
  138:                 $ENV{'request.symb'}=$symb;
  139:                 &Apache::lonnet::courseacclog($symb);
  140:             } else {
  141: # ------------------------------------------------------- This is other content
  142:                 &Apache::lonnet::courseacclog($requrl);    
  143:             }
  144: 	  }
  145:             return OK; 
  146:         } else { 
  147:             $r->log_reason("Cookie $handle not valid", $r->filename) 
  148:         };
  149:     }
  150: 
  151: # -------------------------------------------- See if this is a public resource
  152:     if ($requrl=~m|^/public/|
  153: 	|| (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
  154:         &Apache::lonnet::logthis('Granting public access: '.$requrl);
  155: 	my $buffer;
  156: 	$r->read($buffer,$r->header_in('Content-length'),0);
  157: 	&Apache::loncommon::get_unprocessed_cgi($buffer);
  158: 	$ENV{'user.name'}='public';
  159:         $ENV{'user.domain'}='public';
  160:         $ENV{'request.state'} = "published";
  161:         $ENV{'request.publicaccess'} = 1;
  162:         $ENV{'request.filename'} = $r->filename;
  163:         return OK;
  164:     }
  165: # -------------------------------------------------------------- Not authorized
  166:     $requrl=~/\.(\w+)$/;
  167:     if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
  168:         ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
  169:         ($requrl=~m|^/prtspool/|)) {
  170: # -------------------------- Store where they wanted to go and get login screen
  171: 	$ENV{'request.querystring'}=$r->args;
  172: 	$ENV{'request.firsturl'}=$requrl;
  173:        return FORBIDDEN;
  174:    } else {
  175: # --------------------------------------------------------------------- Goodbye
  176:        return HTTP_BAD_REQUEST;
  177:    }
  178: }
  179: 
  180: 1;
  181: __END__
  182: 
  183: =head1 NAME
  184: 
  185: Apache::lonacc - Cookie Based Access Handler
  186: 
  187: =head1 SYNOPSIS
  188: 
  189: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
  190: 
  191:  PerlAccessHandler       Apache::lonacc
  192: 
  193: =head1 INTRODUCTION
  194: 
  195: This module enables cookie based authentication and is used
  196: to control access for many different LON-CAPA URIs.
  197: 
  198: Whenever the client sends the cookie back to the server, 
  199: this cookie is handled by either lonacc.pm or loncacc.pm
  200: (see srm.conf for what is invoked when).  If
  201: the cookie is missing or invalid, the user is re-challenged
  202: for login information.
  203: 
  204: This is part of the LearningOnline Network with CAPA project
  205: described at http://www.lon-capa.org.
  206: 
  207: =head1 HANDLER SUBROUTINE
  208: 
  209: This routine is called by Apache and mod_perl.
  210: 
  211: =over 4
  212: 
  213: =item *
  214: 
  215: transfer profile into environment
  216: 
  217: =item *
  218: 
  219: load POST parameters
  220: 
  221: =item *
  222: 
  223: check access
  224: 
  225: =item *
  226: 
  227: if allowed, get symb, log, generate course statistics if applicable
  228: 
  229: =item *
  230: 
  231: otherwise return error
  232: 
  233: =item *
  234: 
  235: see if public resource
  236: 
  237: =item *
  238: 
  239: store attempted access
  240: 
  241: =back
  242: 
  243: =cut