# The LearningOnline Network
# Login Screen
#
# $Id: lonlogin.pm,v 1.23 2002/09/17 19:48:40 matthew 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
#
# 2/7/02,2/8,2/12,2/14,2/15,2/19 Josh Brunskole
#
# 7/10/02 Jeremy Bowers
package Apache::lonlogin;
use strict;
use Apache::Constants qw(:common);
use Apache::File ();
use Apache::lonnet();
use Apache::loncommon();
sub handler {
my $r = shift;
$r->content_type('text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
return OK if $r->header_only;
&Apache::loncommon::get_unprocessed_cgi
($ENV{'QUERY_STRING'},['interface']);
$ENV{'form.interface'}=~s/\W//g;
my $fullgraph=($ENV{'form.interface'} ne 'textual');
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 (($role eq 'access') or ($loadpercent>100.0)) {
$otherserver=Apache::lonnet::spareserver($loadpercent);
}
# -------------------------------------------------------- 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);
if ($lextkey>2147483647) { $lextkey-=4294967296; }
my $uextkey=hex($ukey);
if ($uextkey>2147483647) { $uextkey-=4294967296; }
my $logtoken=Apache::lonnet::reply(
'tmpput:'.$ukey.$lkey.'&'.$firsturl,
$lonhost);
my $domainlogo=&Apache::loncommon::domainlogo();
# --------------------------------------------------- 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>);
}
# ----------------------------------------------------------- Front page design
my $pgbg=&Apache::loncommon::designparm('login.pgbg');
my $font=&Apache::loncommon::designparm('login.font');
my $link=&Apache::loncommon::designparm('login.link');
my $vlink=&Apache::loncommon::designparm('login.vlink');
my $alink=&Apache::loncommon::designparm('login.alink');
my $mainbg=&Apache::loncommon::designparm('login.mainbg');
my $sidebg=&Apache::loncommon::designparm('login.sidebg');
my $logo=&Apache::loncommon::designparm('login.logo');
my $img=&Apache::loncommon::designparm('login.img');
# ---------------------------------------------------------- Serve rest of page
$r->print(<<ENDSCRIPT);
<body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"
onLoad="init();" topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>
<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();
return false;
}
</script>
ENDSCRIPT
if ($fullgraph) {
$r->print(
'<table width="100%" cellpadding=0 cellspacing=0 border=0>');
}
$r->print(<<ENDSERVERFORM);
<form name="server" action="$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=interface value="$ENV{'form.interface'}">
<input type=hidden name=uname value="">
<input type=hidden name=upass value="">
<input type=hidden name=udom value="">
</form>
ENDSERVERFORM
if ($fullgraph) { $r->print(<<ENDTOP);
<!-- The LON-CAPA Header -->
<tr>
<!-- Row 1 Columns 2-4 -->
<td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="#006600"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>
</tr>
<!-- The gray bar that starts the two table frames -->
<tr>
<!-- Row 2 Column 1 -->
<td width=182 height=27 bgcolor="$sidebg"> </td>
<!-- Row 2 Column 2 -->
<td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>
<!-- Row 2 Column 3 -->
<td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>
<!-- Row 2 Column 4 -->
<td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>
</tr>
<tr>
<!-- A cell that will hold the 'access' and 'about' buttons -->
<!-- Row 3 Column 1 -->
<td valign="top" height=60 align="center" bgcolor="$sidebg">
<a href="/adm/login?interface=textual"><img src="$iconpath/accessbutton.gif" border=0 alt="Accessibility Options" /></a>
<br />
<a href="/adm/about.html"><img src="$iconpath/aboutlon.gif" border=0 alt="About LON-CAPA" /></a>
</td>
<!-- The shaded space between the two main columns -->
<!-- Row 3 Column 2 -->
<td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
<!-- The right main column holding the large LON-CAPA logo-->
<!-- Rows 3-4 Column 3 -->
<td align="center" valign="top" width="100%" height="100%" rowspan=2 bgcolor="$mainbg">
<center>
<img src="$logo" alt="" />
</center>
</td>
<!-- Row 3 Column 4 -->
<td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
</tr>
<tr>
<!-- The entry form -->
<!-- Row 4 Column 1 -->
<td align="center" valign="middle" bgcolor="$sidebg">
ENDTOP
}
$r->print(<<ENDLOGIN);
<form name="client" onsubmit="return(send())">
<input type="hidden" name="lextkey" value="$lextkey">
<input type="hidden" name="uextkey" value="$uextkey">
<!-- Start the sub-table for text and input alignment -->
<table border=0 cellspacing=0 cellpadding=0>
<tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/userauthentication.gif" alt="User Authentication" /></td></tr>
<tr>
<td bgcolor="$mainbg"><br /><font size=-1><b> User Name:</b></font></td>
<td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" /></td>
</tr>
<tr>
<td bgcolor="$mainbg"><font size=-1><b> Password:</b></font></td>
<td bgcolor="$mainbg"><input type="password" name="upass" size="10" /></td>
</tr>
<tr>
<td bgcolor="$mainbg"><font size=-1><b> Domain:</b></font></td>
<td bgcolor="$mainbg"><input type="text" name="udom" size="10" value=$domain /></td>
</tr>
<tr>
<td bgcolor="$mainbg" valign="bottom" align="center" colspan=2>
<br />
<input type="submit" value="Log In" />
</td>
</tr>
</table>
<!-- End sub-table -->
</form>
ENDLOGIN
if ($fullgraph) {
$r->print(<<ENDDOCUMENT);
</td>
<!-- Row 4 Column 2 -->
<td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
<!-- Row 4 Column 4 -->
<td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
</tr>
<tr>
<!-- Row 5 Column 1 -->
<td bgcolor="$sidebg" valign="middle" align="left">
<br />
<table border=0 cellspacing=0 cellpadding=0>
<tr>
<td bgcolor="$sidebg" align="left" valign="top">
<small><b> Domain: </b></small>
</td>
<td bgcolor="$sidebg" align="left" valign="top">
<small><tt> $domain</tt></small>
</td>
</tr>
<tr>
<td bgcolor="$sidebg" align="left" valign="top">
<small><b> Server: </b></small>
</td>
<td bgcolor="$sidebg" align="left" valign="top">
<small><tt> $lonhost ($role)</tt></small>
</td>
</tr>
<tr>
<td bgcolor="$sidebg" align="left" valign="top">
<small><b> Load: </b></small>
</td>
<td bgcolor="$sidebg" align="left" valign="top">
<small><tt> $loadpercent percent</tt></small>
</td>
</tr>
</table>
<br />
<small>
<b> System Administration:</b><br />
<tt> $sysadm</tt><br />
<b> Server Administration:</b><br />
<tt> $servadm<br /> </tt>
</small>
</td>
<!-- Row 5 Column 2 -->
<td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>
<!-- Row 5 Column 3 -->
<td width="100%" valign="bottom" bgcolor="$mainbg">
$domainlogo
</td>
<!-- Row 5 Column 4 -->
<td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>
</tr>
<tr>
<!-- Row 6 Column 1 -->
<td bgcolor="$sidebg"> </td>
<!-- Row 6 Column 2 -->
<td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>
<!-- Row 6 Column 3 -->
<td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>
<!-- Row 6 Column 4 -->
<td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>
</tr>
</table>
ENDDOCUMENT
}
$r->print('</body></html>');
return OK;
}
1;
__END__
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