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Diff for /loncom/auth/lonacc.pm between versions 1.17 and 1.37

version 1.17, 2001/05/28 22:29:17 version 1.37, 2002/11/06 22:43:27
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Cookie Based Access Handler  # Cookie Based Access Handler
   #
   # $Id$
   #
   # 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/
   #
   # YEAR=1999
 # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11,  # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11,
   # YEAR=2000
 # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6,  # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6,
 # 12/25,12/26,  # 12/25,12/26,
 # 01/06/01,05/28 Gerd Kortemeyer  # YEAR=2001
   # 01/06/01,05/28,8/11,9/26,11/29 Gerd Kortemeyer
   # 12/15 Scott Harrison
   # YEAR=2002
   # 1/4,2/25 Gerd Kortemeyer
   #
   ###
   
 package Apache::lonacc;  package Apache::lonacc;
   
Line 11  use strict; Line 44  use strict;
 use Apache::Constants qw(:common :http :methods);  use Apache::Constants qw(:common :http :methods);
 use Apache::File;  use Apache::File;
 use Apache::lonnet;  use Apache::lonnet;
   use Apache::loncommon();
 use CGI::Cookie();  use CGI::Cookie();
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
   
Line 42  sub handler { Line 76  sub handler {
                 $ENV{$envname} = $envvalue;                  $ENV{$envname} = $envvalue;
             }              }
             $ENV{'user.environment'} = "$lonidsdir/$handle.id";              $ENV{'user.environment'} = "$lonidsdir/$handle.id";
             if ($requrl=~/^\/res\/) {              if ($requrl=~/^\/res\//) {
                $ENV{'request.state'} = "published";                 $ENV{'request.state'} = "published";
     } else {      } else {
        $ENV{'request.state'} = 'unknown';         $ENV{'request.state'} = 'unknown';
             }              }
             $ENV{'request.filename'} = $r->filename;              $ENV{'request.filename'} = $r->filename;
   
 # --------------------- Figure out referer, first from HTTP_REFERER, then cache  
   
             my $referer='';  
             if ($referer=$r->header_in('Referer')) {  
                $ENV{'HTTP_REFERER'}=$referer;  
     } else {  
        $ENV{'HTTP_REFERER'}=$ENV{'httpref.'.$requrl};  
     }  
   
 # -------------------------------------------------------- Load POST parameters  # -------------------------------------------------------- Load POST parameters
   
   
Line 65  sub handler { Line 90  sub handler {
         my $buffer;          my $buffer;
   
         $r->read($buffer,$r->header_in('Content-length'));          $r->read($buffer,$r->header_in('Content-length'));
   
  unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {   unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
             my @pairs=split(/&/,$buffer);              my @pairs=split(/&/,$buffer);
             my $pair;              my $pair;
Line 75  sub handler { Line 99  sub handler {
                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;                 $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                $name  =~ tr/+/ /;                 $name  =~ tr/+/ /;
                $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;                 $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                $ENV{"form.$name"}=$value;         &Apache::loncommon::add_to_env("form.$name",$value);
             }              }
         } else {          } else {
     my $contentsep=$1;      my $contentsep=$1;
Line 95  sub handler { Line 119  sub handler {
                         } else {                          } else {
                             $value=~s/\s+$//s;                              $value=~s/\s+$//s;
                         }                          }
                         $ENV{"form.$name"}=$value;   &Apache::loncommon::add_to_env("form.$name",$value);
                     }                      }
                     if ($i<$#lines) {                      if ($i<$#lines) {
  $i++;   $i++;
Line 123  sub handler { Line 147  sub handler {
                 }                  }
             }              }
  }   }
       $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
             $r->method_number(M_GET);              $r->method_number(M_GET);
     $r->method('GET');      $r->method('GET');
             $r->headers_in->unset('Content-length');              $r->headers_in->unset('Content-length');
   
 # ---------------------------------------------------------------- Check access  # ---------------------------------------------------------------- Check access
   
             if ($requrl!~/^\/adm\//) {              if ($requrl!~/^\/adm|public|prtspool\//) {
  my $access=&Apache::lonnet::allowed('bre',$requrl);   my $access=&Apache::lonnet::allowed('bre',$requrl);
                 if ($access eq '1') {                  if ($access eq '1') {
    $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";     $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
Line 139  sub handler { Line 164  sub handler {
    $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";     $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
            return HTTP_NOT_ACCEPTABLE;              return HTTP_NOT_ACCEPTABLE; 
                 }                  }
             }               }
       if ($requrl =~ m|^/prtspool/|) {
    my $start='/prtspool/'.$ENV{'user.name'}.'_'.
       $ENV{'user.domain'};
    if ($requrl !~ /^\Q$start\E/) {
       $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
       return HTTP_NOT_ACCEPTABLE;
    }
       }
   # ------------------------------------------------------------- This is allowed
             if ($ENV{'request.course.id'}) {
       &Apache::lonnet::countacc($requrl);
               $requrl=~/\.(\w+)$/;
               if (&Apache::loncommon::fileembstyle($1) eq 'ssi') {
   # ------------------------------------- This is serious stuff, get symb and log
    my $query=$r->args;
                   my $symb;
                   if ($query) {
       &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
                   }
                   if ($ENV{'form.symb'}) {
       $symb=&Apache::lonnet::symbclean($ENV{'form.symb'});
                       if (&Apache::lonnet::symbverify($symb,$requrl)) {
                         my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
                         &Apache::lonnet::symblist($map,$murl => $mid,
                                                  'last_known' => $murl);
       } else {
    $r->log_reason('Invalid symb for '.$requrl.': '.
                                          $symb);
           $ENV{'user.error.msg'}=
                                   "$requrl:bre:1:1:Invalid Access";
                    return HTTP_NOT_ACCEPTABLE; 
                       }
                   } else {
               $symb=&Apache::lonnet::symbread;
                   }
                   $ENV{'request.symb'}=$symb;
                   &Apache::lonnet::courseacclog($symb);
               } else {
   # ------------------------------------------------------- This is other content
                   &Apache::lonnet::courseacclog($requrl);    
               }
     }
             return OK;               return OK; 
         } else {           } else { 
             $r->log_reason("Cookie $handle not valid", $r->filename)               $r->log_reason("Cookie $handle not valid", $r->filename) 
         };          };
     }      }
   
 # ----------------------------------------------- Store where they wanted to go  # -------------------------------------------- See if this is a public resource
       if ($requrl=~m|^/public/|
     $ENV{'request.firsturl'}=$requrl;   || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
     return FORBIDDEN;          &Apache::lonnet::logthis('Granting public access: '.$requrl);
    $ENV{'user.name'}='public';
           $ENV{'user.domain'}='public';
           $ENV{'request.state'} = "published";
           $ENV{'request.publicaccess'} = 1;
           $ENV{'request.filename'} = $r->filename;
           return OK;
       }
   # -------------------------------------------------------------- Not authorized
       $requrl=~/\.(\w+)$/;
       if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
           ($requrl=~/^\/adm\/(roles|logout)/) ||
           ($requrl=~m|^/prtspool/|)) {
   # -------------------------- Store where they wanted to go and get login screen
          $ENV{'request.firsturl'}=$requrl;
          return FORBIDDEN;
      } else {
   # --------------------------------------------------------------------- Goodbye
          return HTTP_BAD_REQUEST;
      }
 }  }
   
 1;  1;
 __END__  __END__
   
   =head1 NAME
   
   Apache::lonacc - Cookie Based Access Handler
   
   =head1 SYNOPSIS
   
   Invoked (for various locations) by /etc/httpd/conf/srm.conf:
   
    PerlAccessHandler       Apache::lonacc
   
   =head1 INTRODUCTION
   
   This module enables cookie based authentication and is used
   to control access for many different LON-CAPA URIs.
   
   Whenever the client sends the cookie back to the server, 
   this cookie is handled by either lonacc.pm or loncacc.pm
   (see srm.conf for what is invoked when).  If
   the cookie is missing or invalid, the user is re-challenged
   for login information.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 HANDLER SUBROUTINE
   
   This routine is called by Apache and mod_perl.
   
   =over 4
   
   =item *
   
   transfer profile into environment
   
   =item *
   
   load POST parameters
   
   =item *
   
   check access
   
   =item *
   
   if allowed, get symb, log, generate course statistics if applicable
   
   =item *
   
   otherwise return error
   
   =item *
   
   see if public resource
   
   =item *
   
   store attempted access
   
   =back
   
   =cut
Removed from v.1.17  
changed lines
  Added in v.1.37

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