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Diff for /loncom/auth/lonracc.pm between versions 1.3 and 1.17

version 1.3, 2001/11/29 19:12:44 version 1.17, 2005/04/07 06:56:21
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # (lonacc: Cookie Based Access Handler  
 # 5/21/99,5/22,5/29,5/31,6/15 Gerd Kortemeyer)  
 # 6/16,6/18,7/3,  
 # 6/30/00 Gerd Kortemeyer  
   
 package Apache::lonracc;  package Apache::lonracc;
   
 use strict;  use strict;
 use Apache::Constants qw(:common :remotehost);  use Apache::Constants qw(:common :remotehost);
   use Apache::lonnet;
 use Apache::File();  use Apache::File();
   use IO::Socket;
   
   sub subscribed {
       my ($filename,$id) = @_;
       my $found=0;
       my $hostname=$Apache::lonnet::hostname{$id};
       my (undef,undef,undef,undef,$ip) = gethostbyname($hostname);
       $ip=inet_ntoa($ip);
       my $expr='^'.$id.':'.$ip.':';
       $expr =~ s/\./\\\./g;
       my $sh;
       if ($sh=Apache::File->new("$filename.subscription")) {
    while (my $subline=<$sh>) { if ($subline =~ /$expr/) { $found=1; } }
    $sh->close();
       }
       return $found;
   }
   
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
     my $reqhost;      my $reqhost = $r->get_remote_host(REMOTE_NOLOOKUP);
     unless ($reqhost=$r->get_remote_host(REMOTE_DOUBLE_REV)) {      my %iphost=&Apache::lonnet::get_iphost();
        $r->log_reason("Spoof request");      my $hostids=$iphost{$reqhost};
        return FORBIDDEN;      if (!$hostids && $reqhost ne '127.0.0.1' ) {
    $r->log_reason("Unable to find a host for ".
          $r->get_remote_host(REMOTE_NOLOOKUP));
    return FORBIDDEN;
     }      }
     my $readline;      if ($reqhost eq '127.0.0.1') {
     my $lontabdir=$r->dir_config('lonTabDir');   return OK;
     {      }
        my $fh;      my $return;
        unless ($fh=Apache::File->new("$lontabdir/hosts.tab")) {      my @ids=();
           $r->log_reason("Could not find host tab file");      my $id;
           return FORBIDDEN;  
        }      foreach $id (@{$hostids}) {
        while ($readline=<$fh>) {   my $filename=$r->filename;
           my ($id,$domain,$role,$name,$ip)=split(/:/,$readline);   my $uri =$r->uri;
           if ($name =~ /$reqhost/i) {   if ((-e "$filename.$id") ||
               my $filename=$r->filename;      &subscribed($filename,$id) ||
               if ((-e "$filename.$id") || ($filename=~/\.meta$/)) {      ($filename=~/\.meta$/) ||
          return OK;      ($uri=~m|^/raw/uploaded|)) {
               } else {      return OK;
                  $r->log_reason("$id not subscribed", $r->filename);   } else {
                  return FORBIDDEN;      $return=FORBIDDEN;
               }      push(@ids,$id);
           }   }
        }      }
       if ($return == FORBIDDEN) {
    $r->log_reason(join(':',@ids)." not subscribed", $r->filename);
    return FORBIDDEN;
     }      }
     $r->log_reason("Invalid request for file transfer from $reqhost",       $r->log_reason("Invalid request for file transfer from $reqhost", 
                    $r->filename);                      $r->filename); 
Line 73  sub handler { Line 92  sub handler {
 1;  1;
 __END__  __END__
   
   =head1 NAME
   
   Apache::lonracc - Access Handler for File Transfers
   
   =head1 SYNOPSIS
   
   Invoked by /etc/httpd/conf/loncapa.conf:
   
    <LocationMatch "^/raw.*">
    PerlAccessHandler Apache::lonracc
    </LocationMatch>
   
   =head1 INTRODUCTION
   
   This module enables authentication for file transfers and works
   against the /res tree.
   
   Only lond invokes the /raw namespace through its subscribe function.
   
   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 *
   
   Determine requesting host
   
   =item *
   
   See whether or not the requesting host is subscribed.
   
   =item *
   
   Respond with status of request and make log entry in case of unallowed
   access.
   
   =back
   
   =cut
   
   
   
Removed from v.1.3  
changed lines
  Added in v.1.17

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