# The LearningOnline Network
# Login Screen
#
# $Id: lonlogin.pm,v 1.11 2001/11/29 19:12:44 www 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/
#
# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9,
# 1/17/01 Gerd Kortemeyer
#
package Apache::lonlogin;
use strict;
use Apache::Constants qw(:common);
use Apache::File ();
use Apache::lonnet();
sub handler {
my $r = shift;
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
my $iconpath= $r->dir_config('lonIconsURL');
my $domain = $r->dir_config('lonDefDomain');
my $role = $r->dir_config('lonRole');
my $loadlim = $r->dir_config('lonLoadLim');
my $servadm = $r->dir_config('lonAdmEMail');
my $sysadm = $r->dir_config('lonSysEMail');
my $lonhost = $r->dir_config('lonHostID');
my $tabdir = $r->dir_config('lonTabDir');
my $include = $r->dir_config('lonIncludes');
my $loadavg;
{
my $loadfile=Apache::File->new('/proc/loadavg');
$loadavg=<$loadfile>;
}
$loadavg =~ s/\s.*//g;
my $loadpercent=100*$loadavg/$loadlim;
my $otherserver='http://'.$ENV{'SERVER_NAME'};
my $firsturl=$ENV{'request.firsturl'};
# ---------------------------------------- Are we access server and overloaded?
if (($role eq 'access') && ($loadpercent>100.0)) {
$otherserver=Apache::lonnet::spareserver();
}
# -------------------------------------------------------- Set login parameters
my @hexstr=('0','1','2','3','4','5','6','7',
'8','9','a','b','c','d','e','f');
my $lkey='';
for (0..7) {
$lkey.=$hexstr[rand(15)];
}
my $ukey='';
for (0..7) {
$ukey.=$hexstr[rand(15)];
}
my $lextkey=hex($lkey);
my $uextkey=hex($ukey);
my $logtoken=Apache::lonnet::reply(
'tmpput:'.$ukey.$lkey.'&'.$firsturl,
$lonhost);
# --------------------------------------------------- Print login screen header
$r->print(<<ENDHEADER);
<html>
<head>
<title>The LearningOnline Network with CAPA Login</title>
</head>
ENDHEADER
# ---------------------------------------------------- Serve out DES JavaScript
{
my $jsh=Apache::File->new($include."/londes.js");
$r->print(<$jsh>);
}
# ---------------------------------------------------------- Serve rest of page
$r->print(<<ENDDOCUMENT);
<body bgcolor="#FFFFFF" text="#000000" link="#999999" vlink="#999999"
onLoad="init();">
<script language="JavaScript">
function send() {
this.document.server.elements.uname.value
=this.document.client.elements.uname.value;
this.document.server.elements.udom.value
=this.document.client.elements.udom.value;
uextkey=this.document.client.elements.uextkey.value;
lextkey=this.document.client.elements.lextkey.value;
initkeys();
this.document.server.elements.upass.value
=crypted(this.document.client.elements.upass.value);
this.document.server.submit();
}
</script>
<a href="/adm/accessibility.html">Accessibility Options</a>
<a href="/adm/about.html">About LON-CAPA</a><p>
<table width=600>
<tr><td>
<img src="$iconpath/lonlogo.gif"></td>
<td colspan=2 bgcolor="#DDDDDD">
<font size=+1><b>User Authentication</b></font><p>
<form name="server" action="$otherserver/adm/authenticate"
method="post" target="_top">
<input type=hidden name=logtoken value="$logtoken">
<input type=hidden name=serverid value="$lonhost">
<input type=hidden name=uname value="">
<input type=hidden name=upass value="">
<input type=hidden name=udom value="">
</form>
<form name="client">
<table border=2 bgcolor="#BBBBBB">
<tr><td>Username:</td><td><input type=text size=10 name=uname></td></tr>
<tr><td>Password:</td><td><input type=password size=10 name=upass></td></tr>
<tr><td>Domain:</td><td><input type=text size=10 value=$domain name=udom></td>
</tr>
<tr><td colspan=2><input type=button value=Login onClick="send();"></td></tr>
</table>
<input type=hidden name=lextkey value="$lextkey">
<input type=hidden name=uextkey value="$uextkey">
</form>
</td>
</tr><tr><td bgcolor="#DDDDDD">
<table border=1 bgcolor="#BBBBBB">
<tr><td><font size="-1"><b>Domain:</b></font></td>
<td><font size="-1"><tt>$domain</tt></font></td>
<td rowspan=3><font size="-1"><b>System Administration:</b><br>
<tt>$sysadm</tt><br>
<b>Server Administration:</b><br>
<tt>$servadm</tt></font></td></tr>
<tr><td><font size="-1"><b>Server:</b></font></td>
<td><font size="-1"><tt>$lonhost ($role)</tt></font></td></tr>
<tr><td><font size="-1"><b>Load:</b></font></td>
<td><font size="-1"><tt>$loadpercent</tt> percent</font></td></tr>
</table>
</td><td>
<font size="+1">
<b>L</b>aboratory for<br>
<b>I</b>nstructional<br>
<b>T</b>echnology in<br>
<b>E</b>ducation</td><td>
<img src="$iconpath/liteani.gif"></font></td></tr></table>
</body>
</html>
ENDDOCUMENT
return OK;
}
1;
__END__
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