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version 1.14, 2000/12/25 12:44:43
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version 1.194, 2021/08/16 15:25:44
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| # The LearningOnline Network |
# The LearningOnline Network |
| # Cookie Based Access Handler |
# Cookie Based Access Handler |
| # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11, |
# |
| # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6, |
# $Id$ |
| # 12/25 Gerd Kortemeyer |
# |
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# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
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# |
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### |
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|
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=head1 NAME |
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|
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Apache::lonacc - Cookie Based Access Handler |
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|
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=head1 SYNOPSIS |
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|
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Invoked (for various locations) by /etc/httpd/conf/srm.conf: |
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|
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PerlAccessHandler Apache::lonacc |
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|
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=head1 INTRODUCTION |
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|
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This module enables cookie based authentication and is used |
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to control access for many different LON-CAPA URIs. |
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|
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Whenever the client sends the cookie back to the server, |
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this cookie is handled by either lonacc.pm or loncacc.pm |
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(see srm.conf for what is invoked when). If |
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the cookie is missing or invalid, the user is re-challenged |
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for login information. |
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|
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This is part of the LearningOnline Network with CAPA project |
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described at http://www.lon-capa.org. |
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|
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=head1 HANDLER SUBROUTINE |
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|
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This routine is called by Apache and mod_perl. |
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|
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=over 4 |
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|
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=item * |
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|
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transfer profile into environment |
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|
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=item * |
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|
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load POST parameters |
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|
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=item * |
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|
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check access |
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|
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=item * |
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|
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if allowed, get symb, log, generate course statistics if applicable |
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|
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=item * |
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|
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otherwise return error |
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|
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=item * |
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|
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see if public resource |
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|
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=item * |
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|
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store attempted access |
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|
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=back |
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|
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=head1 NOTABLE SUBROUTINES |
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|
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=cut |
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|
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|
| package Apache::lonacc; |
package Apache::lonacc; |
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|
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Line 10 use strict;
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Line 98 use strict;
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| 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 CGI::Cookie(); |
use Apache::loncommon(); |
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use Apache::lonlocal; |
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use Apache::restrictedaccess(); |
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use Apache::blockedaccess(); |
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use Apache::lonprotected(); |
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use Fcntl qw(:flock); |
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use LONCAPA qw(:DEFAULT :match); |
| |
|
| sub handler { |
sub cleanup { |
| my $r = shift; |
my ($r)=@_; |
| my $requrl=$r->uri; |
if (! $r->is_initial_req()) { return DECLINED; } |
| my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); |
&Apache::lonnet::save_cache(); |
| my $lonid=$cookies{'lonID'}; |
return OK; |
| my $cookie; |
} |
| if ($lonid) { |
|
| my $handle=$lonid->value; |
sub goodbye { |
| $handle=~s/\W//g; |
my ($r)=@_; |
| my $lonidsdir=$r->dir_config('lonIDsDir'); |
&Apache::lonnet::goodbye(); |
| if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { |
return DONE; |
| |
} |
| # ------------------------------------------- Transfer profile into environment |
|
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############################################### |
| my @profile; |
|
| { |
sub get_posted_cgi { |
| my $idf=Apache::File->new("$lonidsdir/$handle.id"); |
my ($r,$fields) = @_; |
| @profile=<$idf>; |
|
| } |
my $buffer; |
| my $envi; |
if ($r->header_in('Content-length')) { |
| for ($envi=0;$envi<=$#profile;$envi++) { |
$r->read($buffer,$r->header_in('Content-length'),0); |
| chomp($profile[$envi]); |
} |
| my ($envname,$envvalue)=split(/=/,$profile[$envi]); |
my $content_type = $r->header_in('Content-type'); |
| $ENV{$envname} = $envvalue; |
if ($content_type !~ m{^multipart/form-data}) { |
| } |
my @pairs=split(/&/,$buffer); |
| $ENV{'user.environment'} = "$lonidsdir/$handle.id"; |
my $pair; |
| $ENV{'request.state'} = "published"; |
foreach $pair (@pairs) { |
| $ENV{'request.filename'} = $r->filename; |
my ($name,$value) = split(/=/,$pair); |
| |
$value =~ tr/+/ /; |
| # --------------------- Figure out referer, first from HTTP_REFERER, then cache |
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; |
| |
$name =~ tr/+/ /; |
| my $referer=''; |
$name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; |
| if ($referer=$r->header_in('Referer')) { |
if (ref($fields) eq 'ARRAY') { |
| $ENV{'HTTP_REFERER'}=$referer; |
next if (!grep(/^\Q$name\E$/,@{$fields})); |
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} |
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&Apache::loncommon::add_to_env("form.$name",$value); |
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} |
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} else { |
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my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/); |
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my @lines = split (/\n/,$buffer); |
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my $name=''; |
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my $value=''; |
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my $fname=''; |
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my $fmime=''; |
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my $i; |
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for ($i=0;$i<=$#lines;$i++) { |
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if ($lines[$i]=~/^--\Q$contentsep\E/) { |
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if ($name) { |
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chomp($value); |
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if (($r->uri eq '/adm/portfolio') && |
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($name eq 'uploaddoc')) { |
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if (length($value) == 1) { |
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$value=~s/[\r\n]$//; |
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} |
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} elsif ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) { |
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$value=~s/[\r\n]$//; |
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} |
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if (ref($fields) eq 'ARRAY') { |
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next if (!grep(/^\Q$name\E$/,@{$fields})); |
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} |
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if ($fname) { |
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if ($env{'form.symb'} ne '') { |
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my $size = (length($value))/(1024.0 * 1024.0); |
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if (&upload_size_allowed($name,$size,$fname) eq 'ok') { |
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$env{"form.$name.filename"}=$fname; |
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$env{"form.$name.mimetype"}=$fmime; |
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&Apache::loncommon::add_to_env("form.$name",$value); |
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} |
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} else { |
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$env{"form.$name.filename"}=$fname; |
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$env{"form.$name.mimetype"}=$fmime; |
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&Apache::loncommon::add_to_env("form.$name",$value); |
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} |
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} else { |
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$value=~s/\s+$//s; |
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&Apache::loncommon::add_to_env("form.$name",$value); |
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} |
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} |
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if ($i<$#lines) { |
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$i++; |
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$lines[$i]=~ |
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/Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i; |
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$name=$1; |
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$value=''; |
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if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) { |
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$fname=$1; |
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if |
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($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) { |
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$fmime=$1; |
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$i++; |
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} else { |
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$fmime=''; |
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} |
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} else { |
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$fname=''; |
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$fmime=''; |
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} |
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if ($i<$#lines && $lines[$i+1]=~/^Content\-Type\:\s*([\w\-\/]+)/i) { |
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# TODO: something with $1 ! |
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$i++; |
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} |
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if ($i<$#lines && $lines[$i+1]=~/^Content\-transfer\-encoding\:\s*([\w\-\/]+)/i) { |
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# TODO: something with $1 ! |
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$i++; |
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} |
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$i++; |
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} |
| } else { |
} else { |
| $ENV{'HTTP_REFERER'}=$ENV{'httpref.'.$requrl}; |
$value.=$lines[$i]."\n"; |
| } |
} |
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} |
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} |
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# |
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# Digested POSTed values |
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# |
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# Remember the way this was originally done (GET or POST) |
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# |
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$env{'request.method'}=$ENV{'REQUEST_METHOD'}; |
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# |
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# There may also be stuff in the query string |
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# Tell subsequent handlers that this was GET, not POST, so they can access query string. |
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# Also, unset POSTed content length to cover all tracks. |
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# |
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|
| # -------------------------------------------------------- Load POST parameters |
$r->method_number(M_GET); |
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|
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$r->method('GET'); |
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$r->headers_in->unset('Content-length'); |
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} |
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|
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=pod |
| my $buffer; |
|
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|
| $r->read($buffer,$r->header_in('Content-length')); |
=over |
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|
| unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) { |
=item upload_size_allowed() |
| my @pairs=split(/&/,$buffer); |
|
| my $pair; |
Perform size checks for file uploads to essayresponse items in course context. |
| foreach $pair (@pairs) { |
|
| my ($name,$value) = split(/=/,$pair); |
Add form.HWFILESIZE.$part_$id to %env with file size (MB) |
| $value =~ tr/+/ /; |
If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env. |
| $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; |
|
| $name =~ tr/+/ /; |
=cut |
| $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; |
|
| $ENV{"form.$name"}=$value; |
sub upload_size_allowed { |
| } |
my ($name,$size,$fname) = @_; |
| } else { |
if ($name =~ /^HWFILE(\w+)$/) { |
| my $contentsep=$1; |
my $ident = $1; |
| my @lines = split (/\n/,$buffer); |
my $item = 'HWFILESIZE'.$ident; |
| my $name=''; |
my $savesize = sprintf("%.6f",$size); |
| my $value=''; |
&Apache::loncommon::add_to_env("form.$item",$savesize); |
| my $fname=''; |
my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize"); |
| my $fmime=''; |
if (!$maxsize) { |
| my $i; |
$maxsize = 10.0; # FIXME This should become a domain configuration. |
| for ($i=0;$i<=$#lines;$i++) { |
} |
| if ($lines[$i]=~/^$contentsep/) { |
if ($size > $maxsize) { |
| if ($name) { |
my $warn = 'HWFILETOOBIG'.$ident; |
| chomp($value); |
&Apache::loncommon::add_to_env("form.$warn",$fname); |
| $ENV{"form.$name"}=$value; |
return; |
| if ($fname) { |
} |
| $ENV{"form.$name.filename"}=$fname; |
} |
| $ENV{"form.$name.mimetype"}=$fmime; |
return 'ok'; |
| } |
} |
| } |
|
| if ($i<$#lines) { |
=pod |
| $i++; |
|
| $lines[$i]=~ |
=item sso_login() |
| /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i; |
|
| $name=$1; |
handle the case of the single sign on user, at this point $r->user |
| $value=''; |
will be set and valid; now need to find the loncapa user info, and possibly |
| if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) { |
balance them. If $r->user() is set this means either it was either set by |
| $fname=$1; |
SSO or by checkauthen.pm, if a valid cookie was found. The latter case can |
| if |
be identified by the third arg ($usename), except when lonacc is called in |
| ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) { |
an internal redirect to /adm/switchserver (e.g., load-balancing following |
| $fmime=$1; |
successful authentication) -- no cookie set yet. For that particular case |
| $i++; |
simply skip the call to sso_login(). |
| } else { |
|
| $fmime=''; |
returns OK if it was SSO and user was handled. |
| } |
returns undef if not SSO or no means to handle the user. |
| } else { |
|
| $fname=''; |
=cut |
| $fmime=''; |
|
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sub sso_login { |
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my ($r,$handle,$username) = @_; |
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|
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if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') || |
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(defined($env{'user.name'}) && (defined($env{'user.domain'})) |
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&& ($handle ne ''))) { |
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# not an SSO case or already logged in |
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return undef; |
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} |
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|
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my ($user) = ($r->user =~ m/^($match_username)$/); |
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if ($user eq '') { |
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return undef; |
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} |
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|
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my $query = $r->args; |
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my %form; |
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if ($query) { |
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my @items = ('role','symb','iptoken','origurl','ltoken','linkkey'); |
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&Apache::loncommon::get_unprocessed_cgi($query,\@items); |
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foreach my $item (@items) { |
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if (defined($env{'form.'.$item})) { |
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$form{$item} = $env{'form.'.$item}; |
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} |
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} |
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} |
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|
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my %sessiondata; |
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if ($form{'iptoken'}) { |
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%sessiondata = &Apache::lonnet::tmpget($form{'iptoken'}); |
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my $delete = &Apache::lonnet::tmpdel($form{'iptoken'}); |
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unless ($sessiondata{'sessionserver'}) { |
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delete($form{'iptoken'}); |
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} |
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} |
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|
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my ($linkprot,$linkkey); |
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if ($form{'ltoken'}) { |
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my %link_info = &Apache::lonnet::tmpget($form{'ltoken'}); |
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$linkprot = $link_info{'linkprot'}; |
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my $delete = &Apache::lonnet::tmpdel($form{'ltoken'}); |
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} |
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if ($form{'linkkey'} ne '') { |
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$linkkey = $form{'linkkey'}; |
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} |
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|
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my $domain = $r->dir_config('lonSSOUserDomain'); |
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if ($domain eq '') { |
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$domain = $r->dir_config('lonDefDomain'); |
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} |
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my $home=&Apache::lonnet::homeserver($user,$domain); |
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if ($home !~ /(con_lost|no_host|no_such_host)/) { |
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&Apache::lonnet::logthis(" SSO authorized user $user "); |
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my ($is_balancer,$otherserver,$hosthere); |
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if ($form{'iptoken'}) { |
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if (($sessiondata{'domain'} eq $domain) && |
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($sessiondata{'username'} eq $user)) { |
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$hosthere = 1; |
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} |
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} |
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unless ($hosthere) { |
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($is_balancer,$otherserver) = |
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&Apache::lonnet::check_loadbalancing($user,$domain,'login'); |
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if ($is_balancer) { |
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# Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer) |
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my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r); |
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if (($found_server) && ($balancer_cookie =~ /^\Q$domain\E_\Q$user\E_/)) { |
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$otherserver = $found_server; |
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} elsif ($otherserver eq '') { |
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my $lowest_load; |
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($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain); |
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if ($lowest_load > 100) { |
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$otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$domain); |
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} |
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if ($otherserver ne '') { |
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my @hosts = &Apache::lonnet::current_machine_ids(); |
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if (grep(/^\Q$otherserver\E$/,@hosts)) { |
| |
$hosthere = $otherserver; |
| } |
} |
| $i++; |
|
| } |
} |
| } else { |
|
| $value.=$lines[$i]."\n"; |
|
| } |
} |
| } |
} |
| |
} |
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if (($is_balancer) && (!$hosthere)) { |
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# login but immediately go to switch server to find us a new |
| |
# machine |
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&Apache::lonauth::success($r,$user,$domain,$home,'noredirect'); |
| |
foreach my $item (keys(%form)) { |
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$env{'form.'.$item} = $form{$item}; |
| |
} |
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unless (($form{'symb'}) || ($form{'origurl'})) { |
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unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) { |
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$env{'form.origurl'} = $r->uri; |
| |
} |
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} |
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if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) { |
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$env{'request.deeplink.login'} = $form{'origurl'}; |
| |
} elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) { |
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$env{'request.deeplink.login'} = $r->uri; |
| |
} |
| |
if ($env{'request.deeplink.login'}) { |
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&Apache::lonnet::appenv({'request.deeplink.login' => $r->uri}); |
| |
if ($linkprot) { |
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&Apache::lonnet::appenv({'request.linkprot' => $linkprot}); |
| |
} elsif ($linkkey ne '') { |
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&Apache::lonnet::appenv({'request.linkkey' => $linkkey}); |
| |
} |
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} |
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$env{'request.sso.login'} = 1; |
| |
if (defined($r->dir_config("lonSSOReloginServer"))) { |
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$env{'request.sso.reloginserver'} = |
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$r->dir_config('lonSSOReloginServer'); |
| |
} |
| |
my $redirecturl = '/adm/switchserver'; |
| |
if ($otherserver ne '') { |
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$redirecturl .= '?otherserver='.$otherserver; |
| |
} |
| |
$r->internal_redirect($redirecturl); |
| |
$r->set_handlers('PerlHandler'=> undef); |
| |
} else { |
| |
# need to login them in, so generate the need data that |
| |
# migrate expects to do login |
| |
my $ip = &Apache::lonnet::get_requestor_ip($r); |
| |
my %info=('ip' => $ip, |
| |
'domain' => $domain, |
| |
'username' => $user, |
| |
'server' => $r->dir_config('lonHostID'), |
| |
'sso.login' => 1 |
| |
); |
| |
foreach my $item ('role','symb','iptoken','origurl') { |
| |
if (exists($form{$item})) { |
| |
$info{$item} = $form{$item}; |
| |
} |
| |
} |
| |
unless (($info{'symb'}) || ($info{'origurl'})) { |
| |
unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) { |
| |
$info{'origurl'} = $r->uri; |
| |
} |
| |
} |
| |
if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) { |
| |
$info{'deeplink.login'} = $form{'origurl'}; |
| |
} elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) { |
| |
$info{'deeplink.login'} = $r->uri; |
| |
} |
| |
if ($info{'deeplink.login'}) { |
| |
if ($linkprot) { |
| |
$info{'linkprot'} = $linkprot; |
| |
} elsif ($linkkey ne '') { |
| |
$info{'linkkey'} = $linkkey; |
| |
} |
| |
} |
| |
if ($r->dir_config("ssodirecturl") == 1) { |
| |
$info{'origurl'} = $r->uri; |
| |
} |
| |
if (defined($r->dir_config("lonSSOReloginServer"))) { |
| |
$info{'sso.reloginserver'} = |
| |
$r->dir_config('lonSSOReloginServer'); |
| |
} |
| |
if (($is_balancer) && ($hosthere)) { |
| |
$info{'noloadbalance'} = $hosthere; |
| |
} |
| |
my $token = |
| |
&Apache::lonnet::tmpput(\%info, |
| |
$r->dir_config('lonHostID')); |
| |
$env{'form.token'} = $token; |
| |
$r->internal_redirect('/adm/migrateuser'); |
| |
$r->set_handlers('PerlHandler'=> undef); |
| } |
} |
| $r->method_number(M_GET); |
return OK; |
| $r->method('GET'); |
} else { |
| $r->headers_in->unset('Content-length'); |
&Apache::lonnet::logthis(" SSO authorized unknown user $user "); |
| |
my @cancreate; |
| |
my %domconfig = |
| |
&Apache::lonnet::get_dom('configuration',['usercreation'],$domain); |
| |
if (ref($domconfig{'usercreation'}) eq 'HASH') { |
| |
if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') { |
| |
if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') { |
| |
@cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}}; |
| |
} elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && |
| |
($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) { |
| |
@cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}); |
| |
} |
| |
} |
| |
} |
| |
if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) { |
| |
$r->subprocess_env->set('SSOUserUnknown' => $user); |
| |
$r->subprocess_env->set('SSOUserDomain' => $domain); |
| |
if (grep(/^sso$/,@cancreate)) { |
| |
$r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]); |
| |
$r->handler('perl-script'); |
| |
} else { |
| |
$r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect')); |
| |
$r->set_handlers('PerlHandler'=> undef); |
| |
} |
| |
return OK; |
| |
} |
| |
} |
| |
return undef; |
| |
} |
| |
|
| # ---------------------------------------------------------------- Check access |
sub handler { |
| |
my $r = shift; |
| |
my $requrl=$r->uri; |
| |
|
| |
if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) { |
| |
return OK; |
| |
} |
| |
|
| |
if (&Apache::lonnet::is_domainimage($requrl)) { |
| |
return OK; |
| |
} |
| |
|
| |
my %user; |
| |
my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user); |
| |
|
| |
unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) { |
| |
my $result = &sso_login($r,$handle,$user{'name'}); |
| |
if (defined($result)) { |
| |
return $result; |
| |
} |
| |
} |
| |
|
| |
my ($is_balancer,$otherserver); |
| |
|
| |
if ($handle eq '') { |
| |
unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) || |
| |
($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) || |
| |
($requrl =~ m{^/adm/help/}) || |
| |
($requrl =~ m{^/res/$match_domain/$match_username/})) { |
| |
$r->log_reason("Cookie not valid", $r->filename); |
| |
} |
| |
} elsif ($handle ne '') { |
| |
|
| |
# ------------------------------------------------------ Initialize Environment |
| |
my $lonidsdir=$r->dir_config('lonIDsDir'); |
| |
&Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); |
| |
|
| |
# --------------------------------------------------------- Initialize Language |
| |
|
| |
&Apache::lonlocal::get_language_handle($r); |
| |
|
| if ($requrl!~/^\/adm\//) { |
|
| my $access=&Apache::lonnet::allowed('bre',$requrl); |
|
| if ($access eq '1') { |
|
| $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course"; |
|
| return HTTP_NOT_ACCEPTABLE; |
|
| } |
|
| if (($access ne '2') && ($access ne 'F')) { |
|
| $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; |
|
| return HTTP_NOT_ACCEPTABLE; |
|
| } |
|
| } |
|
| return OK; |
|
| } else { |
|
| $r->log_reason("Cookie $handle not valid", $r->filename) |
|
| }; |
|
| } |
} |
| |
|
| # ----------------------------------------------- Store where they wanted to go |
# -------------------------------------------------- Should be a valid user now |
| |
if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') { |
| |
# -------------------------------------------------------------- Resource State |
| |
|
| |
my ($cdom,$cnum); |
| |
if ($env{'request.course.id'}) { |
| |
$cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; |
| |
$cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; |
| |
} |
| |
if ($requrl=~/^\/+(res|uploaded)\//) { |
| |
$env{'request.state'} = "published"; |
| |
} else { |
| |
$env{'request.state'} = 'unknown'; |
| |
} |
| |
$env{'request.filename'} = $r->filename; |
| |
$env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl); |
| |
my ($suppext,$checkabsolute); |
| |
if ($requrl =~ m{^/adm/wrapper/ext/}) { |
| |
my $query = $r->args; |
| |
if ($query) { |
| |
my $preserved; |
| |
foreach my $pair (split(/&/,$query)) { |
| |
my ($name, $value) = split(/=/,$pair); |
| |
unless (($name eq 'symb') || ($name eq 'usehttp')) { |
| |
$preserved .= $pair.'&'; |
| |
} |
| |
if (($env{'request.course.id'}) && ($name eq 'folderpath')) { |
| |
if ($value =~ /^supplemental/) { |
| |
$suppext = 1; |
| |
} |
| |
} |
| |
} |
| |
$preserved =~ s/\&$//; |
| |
if ($preserved) { |
| |
$env{'request.external.querystring'} = $preserved; |
| |
} |
| |
} |
| |
if ($env{'request.course.id'}) { |
| |
$checkabsolute = 1; |
| |
} |
| |
} elsif ($env{'request.course.id'} && |
| |
(($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) || |
| |
($requrl eq "/public/$cdom/$cnum/syllabus") || |
| |
($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) { |
| |
my $query = $r->args; |
| |
if ($query) { |
| |
foreach my $pair (split(/&/,$query)) { |
| |
my ($name, $value) = split(/=/,$pair); |
| |
if ($name eq 'folderpath') { |
| |
if ($value =~ /^supplemental/) { |
| |
$suppext = 1; |
| |
} |
| |
last; |
| |
} |
| |
} |
| |
} |
| |
if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) { |
| |
$checkabsolute = 1; |
| |
} |
| |
} |
| |
if ($checkabsolute) { |
| |
my $hostname = $r->hostname(); |
| |
my $lonhost = &Apache::lonnet::host_from_dns($hostname); |
| |
if ($lonhost) { |
| |
my $actual = &Apache::lonnet::absolute_url($hostname,1,1); |
| |
my $exphostname = &Apache::lonnet::hostname($lonhost); |
| |
my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname; |
| |
unless ($actual eq $expected) { |
| |
$env{'request.use_absolute'} = $expected; |
| |
} |
| |
} |
| |
} |
| |
# -------------------------------------------------------- Load POST parameters |
| |
|
| |
&Apache::lonacc::get_posted_cgi($r); |
| |
|
| $ENV{'request.firsturl'}=$requrl; |
# ------------------------------------------------------ Check if load balancer |
| return FORBIDDEN; |
|
| |
my $checkexempt; |
| |
if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) { |
| |
if ($env{'user.loadbalcheck.time'} + 600 > time) { |
| |
$checkexempt = 1; |
| |
} |
| |
} |
| |
if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) { |
| |
$checkexempt = 1; |
| |
} |
| |
unless (($checkexempt) || (($requrl eq '/adm/switchserver') && (!$r->is_initial_req()))) { |
| |
($is_balancer,$otherserver) = |
| |
&Apache::lonnet::check_loadbalancing($env{'user.name'}, |
| |
$env{'user.domain'}); |
| |
if ($is_balancer) { |
| |
# Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer) |
| |
my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r); |
| |
if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) { |
| |
$otherserver = $found_server; |
| |
} |
| |
unless ($requrl eq '/adm/switchserver') { |
| |
$r->set_handlers('PerlResponseHandler'=> |
| |
[\&Apache::switchserver::handler]); |
| |
} |
| |
if ($otherserver ne '') { |
| |
$env{'form.otherserver'} = $otherserver; |
| |
} |
| |
unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') || |
| |
($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) { |
| |
$env{'form.origurl'} = $r->uri; |
| |
} |
| |
} |
| |
} |
| |
if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) { |
| |
if ($env{'user.name'} eq 'public' && |
| |
$env{'user.domain'} eq 'public') { |
| |
$env{'request.firsturl'}=$requrl; |
| |
return FORBIDDEN; |
| |
} else { |
| |
return OK; |
| |
} |
| |
} |
| |
# ---------------------------------------------------------------- Check access |
| |
my $now = time; |
| |
my ($check_symb,$check_access,$check_block,$access,$poss_symb); |
| |
if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/} |
| |
|| $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) { |
| |
$check_access = 1; |
| |
} |
| |
if ((!$check_access) && ($env{'request.course.id'})) { |
| |
if (($requrl eq '/adm/viewclasslist') || |
| |
($requrl =~ m{^(/adm/wrapper|)\Q/uploaded/$cdom/$cnum/docs/\E}) || |
| |
($requrl =~ m{^/adm/.*/aboutme$}) || |
| |
($requrl=~m{^/adm/coursedocs/showdoc/}) || |
| |
($requrl=~m{^(/adm/wrapper|)/adm/$cdom/$cnum/\d+/ext\.tool$})) { |
| |
$check_block = 1; |
| |
} |
| |
} |
| |
if (($env{'request.course.id'}) && (!$suppext)) { |
| |
$requrl=~/\.(\w+)$/; |
| |
if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') || |
| |
($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) || |
| |
($requrl=~/^\/adm\/wrapper\//) || |
| |
($requrl=~m|^/adm/coursedocs/showdoc/|) || |
| |
($requrl=~m|\.problem/smpedit$|) || |
| |
($requrl=~/^\/public\/.*\/syllabus$/) || |
| |
($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) || |
| |
($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/) || |
| |
($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) { |
| |
$check_symb = 1; |
| |
} |
| |
} |
| |
if (($check_access) || ($check_block)) { |
| |
if ($check_symb) { |
| |
if ($env{'form.symb'}) { |
| |
$poss_symb=&Apache::lonnet::symbclean($env{'form.symb'}); |
| |
} elsif (($env{'request.course.id'}) && ($r->args ne '')) { |
| |
my $query = $r->args; |
| |
foreach my $pair (split(/&/,$query)) { |
| |
my ($name, $value) = split(/=/,$pair); |
| |
$name = &unescape($name); |
| |
$value =~ tr/+/ /; |
| |
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; |
| |
if ($name eq 'symb') { |
| |
$poss_symb = &Apache::lonnet::symbclean($value); |
| |
last; |
| |
} |
| |
} |
| |
} |
| |
if ($poss_symb) { |
| |
my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb); |
| |
$url = &Apache::lonnet::clutter($url); |
| |
my $toplevelmap = $env{'course.'.$env{'request.course.id'}.'.url'}; |
| |
unless (($url eq $requrl) && (($possmap eq $toplevelmap) || |
| |
(&Apache::lonnet::is_on_map($possmap)))) { |
| |
undef($poss_symb); |
| |
} |
| |
if ($poss_symb) { |
| |
if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) && |
| |
($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) { |
| |
undef($poss_symb); |
| |
} elsif ((!$env{'request.role.adv'}) && ($env{'acc.deeplinkout'}) && |
| |
($env{'acc.deeplinkout'}=~/\&\Q$poss_symb\E\&/)) { |
| |
undef($poss_symb); |
| |
} |
| |
} |
| |
} |
| |
if ($poss_symb) { |
| |
$access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb); |
| |
} else { |
| |
$access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1); |
| |
} |
| |
} else { |
| |
my $nodeeplinkcheck; |
| |
if (($check_access) && ($requrl =~ /\.(sequence|page)$/)) { |
| |
unless ($env{'form.navmap'}) { |
| |
if ($r->args ne '') { |
| |
&Apache::loncommon::get_unprocessed_cgi($r->args,['navmap']); |
| |
unless ($env{'form.navmap'}) { |
| |
$nodeeplinkcheck = 1; |
| |
} |
| |
} |
| |
} |
| |
} |
| |
$access=&Apache::lonnet::allowed('bre',$requrl,'','','','','',$nodeeplinkcheck); |
| |
} |
| |
} |
| |
if ($check_block) { |
| |
if ($access eq 'B') { |
| |
if ($poss_symb) { |
| |
if (&Apache::lonnet::symbverify($poss_symb,$requrl)) { |
| |
$env{'request.symb'} = $poss_symb; |
| |
} |
| |
} |
| |
&Apache::blockedaccess::setup_handler($r); |
| |
return OK; |
| |
} |
| |
} elsif ($check_access) { |
| |
if ($handle eq '') { |
| |
unless ($access eq 'F') { |
| |
if ($requrl =~ m{^/res/$match_domain/$match_username/}) { |
| |
$r->log_reason("Cookie not valid", $r->filename); |
| |
} |
| |
} |
| |
} |
| |
if ($access eq '1') { |
| |
$env{'user.error.msg'}="$requrl:bre:0:0:Choose Course"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
if ($access eq 'A') { |
| |
&Apache::restrictedaccess::setup_handler($r); |
| |
return OK; |
| |
} |
| |
if ($access eq 'B') { |
| |
if ($poss_symb) { |
| |
if (&Apache::lonnet::symbverify($poss_symb,$requrl)) { |
| |
$env{'request.symb'} = $poss_symb; |
| |
} |
| |
} |
| |
&Apache::blockedaccess::setup_handler($r); |
| |
return OK; |
| |
} |
| |
if ($access eq 'D') { |
| |
&Apache::lonprotected::setup_handler($r); |
| |
return OK; |
| |
} |
| |
if (($access ne '2') && ($access ne 'F')) { |
| |
if ($requrl =~ m{^/res/}) { |
| |
$access = &Apache::lonnet::allowed('bro',$requrl); |
| |
if ($access ne 'F') { |
| |
if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') { |
| |
$access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem'); |
| |
if ($access ne 'F') { |
| |
$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
} else { |
| |
$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
} |
| |
} elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) { |
| |
my $clientip = &Apache::lonnet::get_requestor_ip($r); |
| |
if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') { |
| |
$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
} else { |
| |
$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; |
| |
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; |
| |
} |
| |
} |
| |
if ($requrl =~ m|^/zipspool/|) { |
| |
my $start='/zipspool/zipout/'.$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; |
| |
} |
| |
} |
| |
if ($env{'user.name'} eq 'public' && |
| |
$env{'user.domain'} eq 'public' && |
| |
$requrl !~ m{^/+(res|public|uploaded)/} && |
| |
$requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x && |
| |
$requrl !~ m{^/adm/blockingstatus/.*$} && |
| |
$requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) { |
| |
$env{'request.querystring'}=$r->args; |
| |
$env{'request.firsturl'}=$requrl; |
| |
return FORBIDDEN; |
| |
} |
| |
# ------------------------------------------------------------- This is allowed |
| |
if ($env{'request.course.id'}) { |
| |
&Apache::lonnet::countacc($requrl); |
| |
my $query=$r->args; |
| |
if ($check_symb) { |
| |
# ------------------------------------- This is serious stuff, get symb and log |
| |
my $symb; |
| |
if ($query) { |
| |
&Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']); |
| |
} |
| |
if ($env{'form.symb'}) { |
| |
$symb=&Apache::lonnet::symbclean($env{'form.symb'}); |
| |
if (($requrl eq '/adm/navmaps') || |
| |
($requrl =~ m{^/adm/wrapper/}) || |
| |
($requrl =~ m{^/adm/coursedocs/showdoc/})) { |
| |
unless (&Apache::lonnet::symbverify($symb,$requrl)) { |
| |
if (&Apache::lonnet::is_on_map($requrl)) { |
| |
$symb = &Apache::lonnet::symbread($requrl); |
| |
unless (&Apache::lonnet::symbverify($symb,$requrl)) { |
| |
undef($symb); |
| |
} |
| |
} |
| |
} |
| |
if ($symb) { |
| |
if ($requrl eq '/adm/navmaps') { |
| |
my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); |
| |
&Apache::lonnet::symblist($map,$murl => [$murl,$mid]); |
| |
} elsif (($requrl =~ m{^/adm/wrapper/}) || |
| |
($requrl =~ m{^/adm/coursedocs/showdoc/})) { |
| |
my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); |
| |
if ($map =~ /\.page$/) { |
| |
my $mapsymb = &Apache::lonnet::symbread($map); |
| |
($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb); |
| |
} |
| |
&Apache::lonnet::symblist($map,$murl => [$murl,$mid], |
| |
'last_known' =>[$murl,$mid]); |
| |
} |
| |
} |
| |
} elsif ((&Apache::lonnet::symbverify($symb,$requrl)) || |
| |
(($requrl=~m|(.*)/smpedit$|) && |
| |
&Apache::lonnet::symbverify($symb,$1)) || |
| |
(($requrl=~m|(.*/aboutme)/portfolio$|) && |
| |
&Apache::lonnet::symbverify($symb,$1))) { |
| |
my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); |
| |
if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) { |
| |
my $mapsymb = &Apache::lonnet::symbread($map); |
| |
($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb); |
| |
} |
| |
&Apache::lonnet::symblist($map,$murl => [$murl,$mid], |
| |
'last_known' =>[$murl,$mid]); |
| |
} else { |
| |
$r->log_reason('Invalid symb for '.$requrl.': '. |
| |
$symb); |
| |
$env{'user.error.msg'}= |
| |
"$requrl:bre:1:1:Invalid Access"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
} else { |
| |
if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) { |
| |
$requrl = $1; |
| |
} |
| |
$symb=&Apache::lonnet::symbread($requrl); |
| |
if (&Apache::lonnet::is_on_map($requrl) && $symb) { |
| |
my ($encstate,$invalidsymb); |
| |
unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) { |
| |
$invalidsymb = 1; |
| |
# |
| |
# If $env{'request.enc'} inconsistent with encryption expected for $symb |
| |
# retrieved by lonnet::symbread(), call again to check for an instance of |
| |
# $requrl in the course for which expected encryption matches request.enc. |
| |
# If symb for different instance passes lonnet::symbverify(), use that as |
| |
# the symb for $requrl and call &Apache::lonnet::allowed() for that symb. |
| |
# Report invalid symb if there is no other symb. Redirect to /adm/ambiguous |
| |
# if multiple possible symbs consistent with request.enc available for $requrl. |
| |
# |
| |
if (($env{'request.enc'} && !$encstate) || (!$env{'request.enc'} && $encstate)) { |
| |
my %possibles; |
| |
my $nocache = 1; |
| |
my $oldsymb = $symb; |
| |
$symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache); |
| |
if (($symb) && ($symb ne $oldsymb)) { |
| |
if (&Apache::lonnet::symbverify($symb,$requrl)) { |
| |
my $access=&Apache::lonnet::allowed('bre',$requrl,$symb); |
| |
if ($access eq 'B') { |
| |
$env{'request.symb'} = $symb; |
| |
&Apache::blockedaccess::setup_handler($r); |
| |
return OK; |
| |
} elsif (($access eq '2') || ($access eq 'F')) { |
| |
$invalidsymb = ''; |
| |
} |
| |
} |
| |
} elsif (keys(%possibles) > 1) { |
| |
$r->internal_redirect('/adm/ambiguous'); |
| |
return OK; |
| |
} |
| |
} |
| |
if ($invalidsymb) { |
| |
if ($requrl eq '/adm/navmaps') { |
| |
undef($symb); |
| |
} else { |
| |
$r->log_reason('Invalid symb for '.$requrl.': '.$symb); |
| |
$env{'user.error.msg'}= |
| |
"$requrl:bre:1:1:Invalid Access"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
} |
| |
} |
| |
} |
| |
if ($symb) { |
| |
my ($map,$mid,$murl)= |
| |
&Apache::lonnet::decode_symb($symb); |
| |
if ($requrl eq '/adm/navmaps') { |
| |
&Apache::lonnet::symblist($map,$murl =>[$murl,$mid]); |
| |
} else { |
| |
if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) { |
| |
my $mapsymb = &Apache::lonnet::symbread($map); |
| |
($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb); |
| |
} |
| |
&Apache::lonnet::symblist($map,$murl =>[$murl,$mid], |
| |
'last_known' =>[$murl,$mid]); |
| |
} |
| |
} |
| |
} |
| |
$env{'request.symb'}=$symb; |
| |
if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) { |
| |
$env{'request.symbread.cached.'} = $symb; |
| |
} |
| |
&Apache::lonnet::courseacclog($symb); |
| |
} else { |
| |
# ------------------------------------------------------- This is other content |
| |
&Apache::lonnet::courseacclog($requrl); |
| |
} |
| |
if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) { |
| |
if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) { |
| |
if ($query) { |
| |
&Apache::loncommon::get_unprocessed_cgi($query,['forceedit']); |
| |
if ($env{'form.forceedit'}) { |
| |
$env{'request.state'} = 'edit'; |
| |
} |
| |
} |
| |
} |
| |
} elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) { |
| |
if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) { |
| |
if ($query) { |
| |
&Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']); |
| |
if (($env{'form.forceedit'}) || ($env{'form.editmode'})) { |
| |
$env{'request.state'} = 'edit'; |
| |
} |
| |
} |
| |
} |
| |
} |
| |
} |
| |
return OK; |
| |
} else { |
| |
my $defdom=$r->dir_config('lonDefDomain'); |
| |
($is_balancer,$otherserver) = |
| |
&Apache::lonnet::check_loadbalancing(undef,$defdom); |
| |
if ($is_balancer) { |
| |
$r->set_handlers('PerlResponseHandler'=> |
| |
[\&Apache::switchserver::handler]); |
| |
if ($otherserver ne '') { |
| |
$env{'form.otherserver'} = $otherserver; |
| |
} |
| |
} |
| |
} |
| |
# -------------------------------------------- See if this is a public resource |
| |
if ($requrl=~m|^/+adm/+help/+|) { |
| |
return OK; |
| |
} |
| |
# ------------------------------------ See if this is a viewable portfolio file |
| |
if (&Apache::lonnet::is_portfolio_url($requrl)) { |
| |
my $clientip = &Apache::lonnet::get_requestor_ip($r); |
| |
my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip); |
| |
if ($access eq 'A') { |
| |
&Apache::restrictedaccess::setup_handler($r); |
| |
return OK; |
| |
} |
| |
if (($access ne '2') && ($access ne 'F')) { |
| |
$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; |
| |
return HTTP_NOT_ACCEPTABLE; |
| |
} |
| |
} |
| |
|
| |
# -------------------------------------------------------------- Not authorized |
| |
$requrl=~/\.(\w+)$/; |
| |
# if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') || |
| |
# ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) || |
| |
# ($requrl=~m|^/prtspool/|)) { |
| |
# -------------------------- Store where they wanted to go and get login screen |
| |
$env{'request.querystring'}=$r->args; |
| |
$env{'request.firsturl'}=$requrl; |
| |
return FORBIDDEN; |
| |
# } else { |
| |
# --------------------------------------------------------------------- Goodbye |
| |
# return HTTP_BAD_REQUEST; |
| |
# } |
| } |
} |
| |
|
| 1; |
1; |
| __END__ |
__END__ |
| |
|
| |
=pod |
| |
|
| |
=back |
| |
|
| |
=cut |
| |
|
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