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Access control course level

    1: # The LearningOnline Network
    2: # Cookie Based Access Handler
    3: # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11,
    4: # 01/06,01/13,05/31,06/01,09/06 Gerd Kortemeyer
    5: 
    6: package Apache::lonacc;
    7: 
    8: use strict;
    9: use Apache::Constants qw(:common :http);
   10: use Apache::File;
   11: use Apache::lonnet;
   12: use CGI::Cookie();
   13: 
   14: sub handler {
   15:     my $r = shift;
   16:     my $requrl=$r->uri;
   17:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   18:     my $lonid=$cookies{'lonID'};
   19:     my $cookie;
   20:     if ($lonid) {
   21: 	my $handle=$lonid->value;
   22:         $handle=~s/\W//g;
   23:         my $lonidsdir=$r->dir_config('lonIDsDir');
   24:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
   25: 
   26: # ------------------------------------------- Transfer profile into environment
   27: 
   28:             my @profile;
   29: 	    {
   30:              my $idf=Apache::File->new("$lonidsdir/$handle.id");
   31:              @profile=<$idf>;
   32: 	    }
   33:             my $envi;
   34:             for ($envi=0;$envi<=$#profile;$envi++) {
   35: 		chomp($profile[$envi]);
   36: 		my ($envname,$envvalue)=split(/=/,$profile[$envi]);
   37:                 $r->subprocess_env("$envname" => "$envvalue");
   38:                 $ENV{$envname}=$envvalue;
   39:             }
   40:             $r->subprocess_env("user.environment" => "$lonidsdir/$handle.id",
   41:                                "request.state"    => "published",
   42:                                "request.filename" => $r->filename);
   43: 
   44: # -------------------------------------------------------- Load POST parameters
   45: 
   46:             my $buffer;
   47: 
   48:             $r->read($buffer,$r->header_in('Content-length'));
   49:             my @pairs=split(/&/,$buffer);
   50:             my $pair;
   51:             foreach $pair (@pairs) {
   52:                my ($name,$value) = split(/=/,$pair);
   53:                $value =~ tr/+/ /;
   54:                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
   55:                $r->subprocess_env("form.$name" => $value);
   56:             }
   57: 
   58: 
   59: # ---------------------------------------------------------------- Check access
   60: 
   61:             if ($requrl!~/^\/adm\//) {
   62: 		my $access=&Apache::lonnet::allowed('bre',$requrl);
   63:                 if ($access eq '1') {
   64: 		   $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
   65: 	           return HTTP_NOT_ACCEPTABLE; 
   66:                 }
   67:                 if (($access ne '2') && ($access ne 'F')) {
   68: 		   $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
   69: 	           return HTTP_NOT_ACCEPTABLE; 
   70:                 }
   71:             } 
   72:             return OK; 
   73:         } else { 
   74:             $r->log_reason("Cookie $handle not valid", $r->filename) 
   75:         };
   76:     }
   77: 
   78: # ----------------------------------------------- Store where they wanted to go
   79: 
   80:     $ENV{'request.firsturl'}=$requrl;
   81:     return FORBIDDEN;
   82: }
   83: 
   84: 1;
   85: __END__