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Applied shared flocks on the environment

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