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    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: # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6,
    5: # 12/25,12/26,
    6: # 01/06/01,05/28 Gerd Kortemeyer
    7: 
    8: package Apache::lonacc;
    9: 
   10: use strict;
   11: use Apache::Constants qw(:common :http :methods);
   12: use Apache::File;
   13: use Apache::lonnet;
   14: use CGI::Cookie();
   15: use Fcntl qw(:flock);
   16: 
   17: sub handler {
   18:     my $r = shift;
   19:     my $requrl=$r->uri;
   20:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   21:     my $lonid=$cookies{'lonID'};
   22:     my $cookie;
   23:     if ($lonid) {
   24: 	my $handle=$lonid->value;
   25:         $handle=~s/\W//g;
   26:         my $lonidsdir=$r->dir_config('lonIDsDir');
   27:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
   28: 
   29: # ------------------------------------------- Transfer profile into environment
   30: 
   31:             my @profile;
   32: 	    {
   33:              my $idf=Apache::File->new("$lonidsdir/$handle.id");
   34:              flock($idf,LOCK_SH);
   35:              @profile=<$idf>;
   36:              $idf->close();
   37: 	    }
   38:             my $envi;
   39:             for ($envi=0;$envi<=$#profile;$envi++) {
   40: 		chomp($profile[$envi]);
   41: 		my ($envname,$envvalue)=split(/=/,$profile[$envi]);
   42:                 $ENV{$envname} = $envvalue;
   43:             }
   44:             $ENV{'user.environment'} = "$lonidsdir/$handle.id";
   45:             if ($requrl=~/^\/res\/) {
   46:                $ENV{'request.state'} = "published";
   47: 	    } else {
   48: 	       $ENV{'request.state'} = 'unknown';
   49:             }
   50:             $ENV{'request.filename'} = $r->filename;
   51: 
   52: # --------------------- Figure out referer, first from HTTP_REFERER, then cache
   53: 
   54:             my $referer='';
   55:             if ($referer=$r->header_in('Referer')) {
   56:                $ENV{'HTTP_REFERER'}=$referer;
   57: 	    } else {
   58: 	       $ENV{'HTTP_REFERER'}=$ENV{'httpref.'.$requrl};
   59: 	    }
   60: 
   61: # -------------------------------------------------------- Load POST parameters
   62: 
   63: 
   64:            
   65:         my $buffer;
   66: 
   67:         $r->read($buffer,$r->header_in('Content-length'));
   68: 
   69: 	unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
   70:             my @pairs=split(/&/,$buffer);
   71:             my $pair;
   72:             foreach $pair (@pairs) {
   73:                my ($name,$value) = split(/=/,$pair);
   74:                $value =~ tr/+/ /;
   75:                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
   76:                $name  =~ tr/+/ /;
   77:                $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
   78:                $ENV{"form.$name"}=$value;
   79:             }
   80:         } else {
   81: 	    my $contentsep=$1;
   82:             my @lines = split (/\n/,$buffer);
   83:             my $name='';
   84:             my $value='';
   85:             my $fname='';
   86:             my $fmime='';
   87:             my $i;
   88:             for ($i=0;$i<=$#lines;$i++) {
   89: 		if ($lines[$i]=~/^$contentsep/) {
   90: 		    if ($name) {
   91:                         chomp($value);
   92: 			if ($fname) {
   93: 			    $ENV{"form.$name.filename"}=$fname;
   94:                             $ENV{"form.$name.mimetype"}=$fmime;
   95:                         } else {
   96:                             $value=~s/\s+$//s;
   97:                         }
   98:                         $ENV{"form.$name"}=$value;
   99:                     }
  100:                     if ($i<$#lines) {
  101: 			$i++;
  102:                         $lines[$i]=~
  103: 		 /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
  104:                         $name=$1;
  105:                         $value='';
  106:                         if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
  107: 			   $fname=$1;
  108:                            if 
  109:                             ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
  110: 			      $fmime=$1;
  111:                               $i++;
  112: 			   } else {
  113:                               $fmime='';
  114:                            }
  115:                         } else {
  116: 			    $fname='';
  117:                             $fmime='';
  118:                         }
  119:                         $i++;
  120:                     }
  121:                 } else {
  122: 		    $value.=$lines[$i]."\n";
  123:                 }
  124:             }
  125: 	}
  126:             $r->method_number(M_GET);
  127: 	    $r->method('GET');
  128:             $r->headers_in->unset('Content-length');
  129: 
  130: # ---------------------------------------------------------------- Check access
  131: 
  132:             if ($requrl!~/^\/adm\//) {
  133: 		my $access=&Apache::lonnet::allowed('bre',$requrl);
  134:                 if ($access eq '1') {
  135: 		   $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
  136: 	           return HTTP_NOT_ACCEPTABLE; 
  137:                 }
  138:                 if (($access ne '2') && ($access ne 'F')) {
  139: 		   $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  140: 	           return HTTP_NOT_ACCEPTABLE; 
  141:                 }
  142:             } 
  143:             return OK; 
  144:         } else { 
  145:             $r->log_reason("Cookie $handle not valid", $r->filename) 
  146:         };
  147:     }
  148: 
  149: # ----------------------------------------------- Store where they wanted to go
  150: 
  151:     $ENV{'request.firsturl'}=$requrl;
  152:     return FORBIDDEN;
  153: }
  154: 
  155: 1;
  156: __END__