File:
[LON-CAPA] /
loncom /
auth /
lonacc.pm
Revision
1.210:
download - view:
text,
annotated -
select for diffs
Mon Aug 28 20:40:00 2023 UTC (15 months, 4 weeks ago) by
raeburn
Branches:
MAIN
CVS tags:
version_2_12_X,
HEAD
- Use standard LON-CAPA error documents for 406, 403 and 500 errors for
/daxeopen/.
- Use loncacc.pm as authz handler for /daxeopen/priv/domain/username/
- Use lonacc.pm as authz handler for /daxeopen/, /daxeopen/priv/, and
/daxeopen/priv/domain/
# The LearningOnline Network
# Cookie Based Access Handler
#
# $Id: lonacc.pm,v 1.210 2023/08/28 20:40:00 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
###
=head1 NAME
Apache::lonacc - Cookie Based Access Handler
=head1 SYNOPSIS
Invoked (for various locations) by /etc/httpd/conf/srm.conf:
PerlAccessHandler Apache::lonacc
=head1 INTRODUCTION
This module enables cookie based authentication and is used
to control access for many different LON-CAPA URIs.
Whenever the client sends the cookie back to the server,
this cookie is handled by either lonacc.pm or loncacc.pm
(see srm.conf for what is invoked when). If
the cookie is missing or invalid, the user is re-challenged
for login information.
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 *
transfer profile into environment
=item *
load POST parameters
=item *
check access
=item *
if allowed, get symb, log, generate course statistics if applicable
=item *
otherwise return error
=item *
see if public resource
=item *
store attempted access
=back
=head1 NOTABLE SUBROUTINES
=cut
package Apache::lonacc;
use strict;
use Apache::Constants qw(:common :http :methods);
use Apache::File;
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonlocal;
use Apache::restrictedaccess();
use Apache::blockedaccess();
use Apache::lonprotected();
use Fcntl qw(:flock);
use LONCAPA qw(:DEFAULT :match);
sub cleanup {
my ($r)=@_;
if (! $r->is_initial_req()) { return DECLINED; }
&Apache::lonnet::save_cache();
return OK;
}
sub goodbye {
my ($r)=@_;
&Apache::lonnet::goodbye();
return DONE;
}
###############################################
sub get_posted_cgi {
my ($r,$fields) = @_;
my $buffer;
if ($r->header_in('Content-length')) {
$r->read($buffer,$r->header_in('Content-length'),0);
}
my $content_type = $r->header_in('Content-type');
if ($content_type !~ m{^multipart/form-data}) {
my @pairs=split(/&/,$buffer);
my $pair;
foreach $pair (@pairs) {
my ($name,$value) = split(/=/,$pair);
$value =~ tr/+/ /;
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
$name =~ tr/+/ /;
$name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
if (ref($fields) eq 'ARRAY') {
next if (!grep(/^\Q$name\E$/,@{$fields}));
}
&Apache::loncommon::add_to_env("form.$name",$value);
}
} else {
my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
my @lines = split (/\n/,$buffer);
my $name='';
my $value='';
my $fname='';
my $fmime='';
my $i;
for ($i=0;$i<=$#lines;$i++) {
if ($lines[$i]=~/^--\Q$contentsep\E/) {
if ($name) {
chomp($value);
if (($r->uri eq '/adm/portfolio') &&
($name eq 'uploaddoc')) {
if (length($value) == 1) {
$value=~s/[\r\n]$//;
}
}
if ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
$value=~s/[\r\n]$//;
}
if (ref($fields) eq 'ARRAY') {
next if (!grep(/^\Q$name\E$/,@{$fields}));
}
if ($fname) {
if ($env{'form.symb'} ne '') {
my $size = (length($value))/(1024.0 * 1024.0);
if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
$env{"form.$name.filename"}=$fname;
$env{"form.$name.mimetype"}=$fmime;
&Apache::loncommon::add_to_env("form.$name",$value);
}
} else {
$env{"form.$name.filename"}=$fname;
$env{"form.$name.mimetype"}=$fmime;
&Apache::loncommon::add_to_env("form.$name",$value);
}
} else {
$value=~s/\s+$//s;
&Apache::loncommon::add_to_env("form.$name",$value);
}
}
if ($i<$#lines) {
$i++;
$lines[$i]=~
/Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
$name=$1;
$value='';
if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
$fname=$1;
if
($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
$fmime=$1;
$i++;
} else {
$fmime='';
}
} else {
$fname='';
$fmime='';
}
if ($i<$#lines && $lines[$i+1]=~/^Content\-Type\:\s*([\w\-\/]+)/i) {
# TODO: something with $1 !
$i++;
}
if ($i<$#lines && $lines[$i+1]=~/^Content\-transfer\-encoding\:\s*([\w\-\/]+)/i) {
# TODO: something with $1 !
$i++;
}
$i++;
}
} else {
$value.=$lines[$i]."\n";
}
}
}
#
# Digested POSTed values
#
# Remember the way this was originally done (GET or POST)
#
$env{'request.method'}=$ENV{'REQUEST_METHOD'};
#
# There may also be stuff in the query string
# Tell subsequent handlers that this was GET, not POST, so they can access query string.
# Also, unset POSTed content length to cover all tracks.
#
$r->method_number(M_GET);
$r->method('GET');
$r->headers_in->unset('Content-length');
}
=pod
=over
=item upload_size_allowed()
Perform size checks for file uploads to essayresponse items in course context.
Add form.HWFILESIZE.$part_$id to %env with file size (MB)
If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
=cut
sub upload_size_allowed {
my ($name,$size,$fname) = @_;
if ($name =~ /^HWFILE(\w+)$/) {
my $ident = $1;
my $item = 'HWFILESIZE'.$ident;
my $savesize = sprintf("%.6f",$size);
&Apache::loncommon::add_to_env("form.$item",$savesize);
my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
if (!$maxsize) {
$maxsize = 10.0; # FIXME This should become a domain configuration.
}
if ($size > $maxsize) {
my $warn = 'HWFILETOOBIG'.$ident;
&Apache::loncommon::add_to_env("form.$warn",$fname);
return;
}
}
return 'ok';
}
=pod
=item sso_login()
handle the case of the single sign on user, at this point $r->user
will be set and valid; now need to find the loncapa user info, and possibly
balance them. If $r->user() is set this means either it was either set by
SSO or by checkauthen.pm, if a valid cookie was found. The latter case can
be identified by the third arg ($usename), except when lonacc is called in
an internal redirect to /adm/switchserver (e.g., load-balancing following
successful authentication) -- no cookie set yet. For that particular case
simply skip the call to sso_login().
returns OK if it was SSO and user was handled.
returns undef if not SSO or no means to handle the user.
In the case where the session was started from /adm/launch/tiny/$domain/$id,
i.e., for a protected link, with launch from another CMS, and user information
is accepted from the LTI payload, then, if the user has privileged roles,
authentication will be required. If SSO authentication is with a username
and/or domain that differ from the username in the LTI payload and domain
in the launch URL, then $r->user() will be unset and /adm/relaunch will be
called.
=cut
sub sso_login {
my ($r,$handle,$username) = @_;
if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
(defined($env{'user.name'}) && (defined($env{'user.domain'}))
&& ($handle ne ''))) {
# not an SSO case or already logged in
return undef;
}
my ($user) = ($r->user =~ m/^($match_username)$/);
if ($user eq '') {
return undef;
}
my $query = $r->args;
my %form;
if ($query) {
my @items = ('role','symb','iptoken','origurl','ttoken',
'ltoken','linkkey','logtoken','sso','lcssowin');
&Apache::loncommon::get_unprocessed_cgi($query,\@items);
foreach my $item (@items) {
if (defined($env{'form.'.$item})) {
$form{$item} = $env{'form.'.$item};
}
}
}
my %sessiondata;
if ($form{'iptoken'}) {
%sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
unless ($sessiondata{'sessionserver'}) {
delete($form{'iptoken'});
}
}
my ($linkprot,$linkprotuser,$linkprotexit,$linkkey,$deeplinkurl,
$linkprotpbid,$linkprotpburl);
#
# If Shibboleth auth is in use, and a dual SSO and non-SSO login page
# is in use, then the query string will contain the logtoken item with
# a value set to the name of a .tmp file in /home/httpd/perl/tmp
# containing the url to display after authentication, and also,
# optionally, role and symb, or linkprot or linkkey (deep-link access).
#
# If Shibboleth auth is in use, but a dual log-in page is not in use,
# and the originally requested URL was /tiny/$domain/$id (i.e.,
# for deeplinking), then the query string will contain the sso item
# with a value set to the name of a .tmp file in /home/httpd/perl/tmp
# containing the url to display after authentication, and also,
# optionally, linkprot or linkkey (deep-link access).
#
# Otherwise the query string may contain role and symb, or if the
# originally requested URL was /tiny/$domain/$id (i.e. for deeplinking)
# then the query string may contain a ttoken item with a value set
# to the name of a .tmp file in /home/httpd/perl/tmp containing either
# linkprot or linkkey (deep-link access).
#
# If deep-linked, i.e., the originally requested URL was /tiny/$domain/$id
# the linkkey may have originally been sent in POSTed data, which will
# have been processed in lontrans.pm
#
if ($form{'ttoken'}) {
my %info = &Apache::lonnet::tmpget($form{'ttoken'});
&Apache::lonnet::tmpdel($form{'ttoken'});
if ($info{'origurl'}) {
$form{'origurl'} = $info{'origurl'};
if ($form{'origurl'} =~ m{^/tiny/$match_domain/\w+$}) {
$deeplinkurl = $form{'origurl'};
}
}
if ($info{'linkprot'}) {
$linkprot = $info{'linkprot'};
$linkprotuser = $info{'linkprotuser'};
$linkprotexit = $info{'linkprotexit'};
$linkprotpbid = $info{'linkprotpbid'};
$linkprotpburl = $info{'linkprotpburl'};
} elsif ($info{'linkkey'} ne '') {
$linkkey = $info{'linkkey'};
}
} elsif ($form{'logtoken'}) {
my ($firsturl,@rest);
my $lonhost = $r->dir_config('lonHostID');
my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},$lonhost);
my $delete = &Apache::lonnet::tmpdel($form{'logtoken'});
unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
($tmpinfo eq 'no_such_host')) {
(undef,$firsturl,@rest) = split(/&/,$tmpinfo);
if ($firsturl ne '') {
$firsturl = &unescape($firsturl);
}
foreach my $item (@rest) {
my ($key,$value) = split(/=/,$item);
$form{$key} = &unescape($value);
}
if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
$form{'origurl'} = $firsturl;
$deeplinkurl = $firsturl;
} elsif ($firsturl eq '/adm/email') {
$form{'origurl'} = $firsturl;
}
if ($form{'linkprot'}) {
$linkprot = $form{'linkprot'};
$linkprotuser = $form{'linkprotuser'};
$linkprotexit = $form{'linkprotexit'};
$linkprotpbid = $form{'linkprotpbid'};
$linkprotpburl = $form{'linkprotpburl'};
} elsif ($form{'linkkey'} ne '') {
$linkkey = $form{'linkkey'};
}
if ($form{'iptoken'}) {
%sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
}
}
} elsif ($form{'sso'}) {
my $lonhost = $r->dir_config('lonHostID');
my $info = &Apache::lonnet::reply('tmpget:'.$form{'sso'},$lonhost);
&Apache::lonnet::tmpdel($form{'sso'});
unless (($info=~/^error/) || ($info eq 'con_lost') ||
($info eq 'no_such_host')) {
my ($firsturl,@rest)=split(/\&/,$info);
if ($firsturl ne '') {
$form{'origurl'} = &unescape($firsturl);
if ($form{'origurl'} =~ m{^/tiny/$match_domain/\w+$}) {
$deeplinkurl = $form{'origurl'};
}
}
foreach my $item (@rest) {
my ($key,$value) = split(/=/,$item);
$form{$key} = &unescape($value);
}
if ($form{'linkprot'}) {
$linkprot = $form{'linkprot'};
$linkprotuser = $form{'linkprotuser'};
$linkprotexit = $form{'linkprotexit'};
$linkprotpbid = $form{'linkprotpbid'};
$linkprotpburl = $form{'linkprotpburl'};
} elsif ($form{'linkkey'} ne '') {
$linkkey = $form{'linkkey'};
}
}
} elsif ($form{'ltoken'}) {
my %link_info = &Apache::lonnet::tmpget($form{'ltoken'});
$linkprot = $link_info{'linkprot'};
if ($linkprot) {
if ($link_info{'linkprotuser'} ne '') {
$linkprotuser = $link_info{'linkprotuser'};
}
if ($link_info{'linkprotexit'} ne '') {
$linkprotexit = $link_info{'linkprotexit'};
}
if ($link_info{'linkprotpbid'} ne '') {
$linkprotpbid = $link_info{'linkprotpbid'};
}
if ($link_info{'linkprotpburl'} ne '') {
$linkprotpburl = $link_info{'linkprotpburl'};
}
}
my $delete = &Apache::lonnet::tmpdel($form{'ltoken'});
delete($form{'ltoken'});
if ($form{'origurl'} =~ m{^/tiny/$match_domain/\w+$}) {
$deeplinkurl = $form{'origurl'};
}
} elsif ($form{'linkkey'} ne '') {
$linkkey = $form{'linkkey'};
}
my $domain = $r->dir_config('lonSSOUserDomain');
if ($domain eq '') {
$domain = $r->dir_config('lonDefDomain');
}
if (($deeplinkurl) && ($linkprot) && ($linkprotuser ne '')) {
unless ($linkprotuser eq $user.':'.$domain) {
$r->user();
my %data = (
origurl => $deeplinkurl,
linkprot => $linkprot,
linkprotuser => $linkprotuser,
linkprotexit => $linkprotexit,
linkprotpbid => $linkprotpbid,
linkprotpburl => $linkprotpburl,
);
if ($env{'form.lcssowin'}) {
$data{'lcssowin'} = $env{'form.lcssowin'};
}
my $token = &Apache::lonnet::tmpput(\%data,$r->dir_config('lonHostID'),'link');
unless (($token eq 'con_lost') || ($token eq 'refused') || ($token =~ /^error:/) ||
($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
$r->internal_redirect('/adm/relaunch?rtoken='.$token);
$r->set_handlers('PerlHandler'=> undef);
return OK;
}
}
}
my $home=&Apache::lonnet::homeserver($user,$domain);
if ($home !~ /(con_lost|no_host|no_such_host)/) {
&Apache::lonnet::logthis(" SSO authorized user $user ");
my ($is_balancer,$otherserver,$hosthere);
if ($form{'iptoken'}) {
if (($sessiondata{'domain'} eq $domain) &&
($sessiondata{'username'} eq $user)) {
$hosthere = 1;
}
}
unless ($hosthere) {
($is_balancer,$otherserver) =
&Apache::lonnet::check_loadbalancing($user,$domain,'login');
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$domain\E_\Q$user\E_/)) {
$otherserver = $found_server;
} elsif ($otherserver eq '') {
my $lowest_load;
($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
if ($lowest_load > 100) {
$otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$domain);
}
if ($otherserver ne '') {
my @hosts = &Apache::lonnet::current_machine_ids();
if (grep(/^\Q$otherserver\E$/,@hosts)) {
$hosthere = $otherserver;
}
}
}
}
}
if (($is_balancer) && (!$hosthere)) {
# login but immediately go to switch server to find us a new
# machine
&Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
foreach my $item (keys(%form)) {
$env{'form.'.$item} = $form{$item};
}
unless (($form{'symb'}) || ($form{'origurl'})) {
unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
$env{'form.origurl'} = $r->uri;
}
}
if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
$env{'request.deeplink.login'} = $form{'origurl'};
} elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
$env{'request.deeplink.login'} = $r->uri;
}
if ($env{'request.deeplink.login'}) {
if ($linkprot) {
$env{'request.linkprot'} = $linkprot;
if ($linkprotuser ne '') {
$env{'request.linkprotuser'} = $linkprotuser;
}
if ($linkprotexit ne '') {
$env{'request.linkprotexit'} = $linkprotexit;
}
if ($linkprotpbid ne '') {
$env{'request.linkprotpbid'} = $linkprotpbid;
}
if ($linkprotpburl ne '') {
$env{'request.linkprotpburl'} = $linkprotpburl;
}
} elsif ($linkkey ne '') {
$env{'request.linkkey'} = $linkkey;
}
}
if (($r->uri eq '/adm/sso') && ($form{'origurl'} eq '/adm/email')) {
if ($form{'display'} && ($env{'form.mailrecip'} eq $user.':'.$domain)) {
$env{'request.display'} = $form{'display'};
$env{'request.mailrecip'} = $env{'form.mailrecip'};
}
}
$env{'request.sso.login'} = 1;
if (defined($r->dir_config("lonSSOReloginServer"))) {
$env{'request.sso.reloginserver'} =
$r->dir_config('lonSSOReloginServer');
}
my $redirecturl = '/adm/switchserver';
if ($otherserver ne '') {
$redirecturl .= '?otherserver='.$otherserver;
}
if ($form{'lcssowin'}) {
$redirecturl .= (($redirecturl=~/\?/)?'&':'?') . 'lcssowin=1';
}
$r->internal_redirect($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 $item ('role','symb','iptoken','origurl','lcssowin') {
if (exists($form{$item})) {
$info{$item} = $form{$item};
} elsif ($sessiondata{$item} ne '') {
$info{$item} = $sessiondata{$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'} = $linkprot;
if ($linkprotuser ne '') {
$info{'linkprotuser'} = $linkprotuser;
}
if ($linkprotexit ne '') {
$info{'linkprotexit'} = $linkprotexit;
}
if ($linkprotpbid ne '') {
$info{'linkprotpbid'} = $linkprotpbid;
}
if ($linkprotpburl ne '') {
$info{'linkprotpburl'} = $linkprotpburl;
}
} elsif ($linkkey ne '') {
$info{'linkkey'} = $linkkey;
}
}
if (($r->uri eq '/adm/sso') && ($form{'origurl'} eq '/adm/email')) {
if ($form{'display'} && ($form{'mailrecip'} eq $user.':'.$domain)) {
$info{'display'} = &escape($form{'display'});
$info{'mailrecip'} = &escape($form{'mailrecip'});
}
}
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'),'sso');
$env{'form.token'} = $token;
$r->internal_redirect('/adm/migrateuser');
$r->set_handlers('PerlHandler'=> undef);
}
return OK;
} else {
&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)) {
#FIXME - need to preserve origurl, role and symb, or linkprot or linkkey for use after account
# creation. If lcssowin is 1, createaccount needs to close pop-up and display in main window.
$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;
}
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/}) || ($requrl eq '/adm/sso') ||
($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($r);
}
# -------------------------------------------------- Should be a valid user now
if ($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);
# ------------------------------------------------------ Check if load balancer
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 ($r->args) {
&Apache::loncommon::get_unprocessed_cgi($r->args,['ttoken']);
if (defined($env{'form.ttoken'})) {
my %info = &Apache::lonnet::tmpget($env{'form.ttoken'});
if (($info{'origurl'} ne '') && ($info{'origurl'} eq $requrl)) {
my %data;
if (($info{'linkprotuser'} ne '') && ($info{'linkprot'}) &&
($info{'linkprotuser'} ne $env{'user.name'}.':'.$env{'user.domain'})) {
%data = (
origurl => $requrl,
linkprot => $info{'linkprot'},
linkprotuser => $info{'linkprotuser'},
linkprotexit => $info{'linkprotexit'},
linkprotpbid => $info{'linkprotpbid'},
linkprotpburl => $info{'linkprotpburl'},
);
} elsif ($info{'ltoken'} ne '') {
my %ltoken_info = &Apache::lonnet::tmpget($info{'ltoken'});
if (($ltoken_info{'linkprotuser'} ne '') && ($ltoken_info{'linkprot'}) &&
($ltoken_info{'linkprotuser'} ne $env{'user.name'}.':'.$env{'user.domain'})) {
%data = (
origurl => $requrl,
linkprot => $ltoken_info{'linkprot'},
linkprotuser => $ltoken_info{'linkprotuser'},
linkprotexit => $ltoken_info{'linkprotexit'},
linkprotpbid => $ltoken_info{'linkprotpbid'},
linkprotpburl => $ltoken_info{'linkprotpburl'},
);
}
}
if (keys(%data)) {
my $delete = &Apache::lonnet::tmpdel($env{'form.ttoken'});
if ($info{'ltoken'} ne '') {
my $delete = &Apache::lonnet::tmpdel($info{'ltoken'});
}
my $token =
&Apache::lonnet::tmpput(\%data,$r->dir_config('lonHostID'),'retry');
unless (($token eq 'con_lost') || ($token eq 'refused') || ($token =~ /^error:/) ||
($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
$r->internal_redirect('/adm/relaunch?rtoken='.$token);
$r->set_handlers('PerlHandler'=> undef);
return OK;
}
}
}
}
}
if ($env{'user.name'} eq 'public' &&
$env{'user.domain'} eq 'public') {
$env{'request.firsturl'}=$requrl;
return FORBIDDEN;
}
return OK;
} elsif (($env{'request.course.id'}) &&
(&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) &&
($requrl=~m{^(/daxeopen|)(/uploaded/$cdom/$cnum/(?:docs|supplemental)/(?:default|\d+)/\d+/)([^/]+|)$})) {
my ($daxe,$path,$file) = ($1,$2,$3);
my $referrer;
unless ($daxe) {
$referrer = $r->headers_in->{'Referer'};
}
if (($daxe) || ($referrer =~ m{\Qfile=/daxeopen$path\E})) {
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) {
if ($requrl =~ m{^/daxeopen/priv/}) {
$nodeeplinkcheck = 1;
} elsif ($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;
}
}
}
}
}
my $clientip = &Apache::lonnet::get_requestor_ip($r);
$access=&Apache::lonnet::allowed('bre',$requrl,'','',$clientip,'','',$nodeeplinkcheck);
if (($requrl =~ m{^/daxeopen/priv/}) && ($access eq '')) {
$env{'request.editurl'}=$requrl;
}
}
}
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;
__END__
=pod
=back
=cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonacc.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth