--- loncom/auth/lonlogin.pm 2003/09/02 22:28:19 1.48
+++ loncom/auth/lonlogin.pm 2015/03/06 20:39:22 1.162
@@ -1,490 +1,764 @@
-# The LearningOnline Network
-# Login Screen
-#
-# $Id: lonlogin.pm,v 1.48 2003/09/02 22:28:19 albertel 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'}.'&'.$ENV{'request.querystring'},
- ['interface','username','domain','firsturl','localpath','localres']);
-
-# ----------------------------------------------------------- Process Interface
- $ENV{'form.interface'}=~s/\W//g;
-
- my $textbrowsers=$r->dir_config('lonTextBrowsers');
- my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
-
- foreach (split(/\:/,$textbrowsers)) {
- if ($httpbrowser=~/$_/i) {
- $ENV{'form.interface'}='textual';
- }
- }
-
- my $fullgraph=($ENV{'form.interface'} ne 'textual');
- my $port_to_use=$r->dir_config('lonhttpdPort');
- if (!defined($port_to_use)) {
- $port_to_use='8080';
- }
- my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use.
- $r->dir_config('lonIconsURL');
- my $domain = $r->dir_config('lonDefDomain');
- if (($ENV{'form.domain'}) &&
- ($Apache::lonnet::domaindescription{$ENV{'form.domain'}})) {
- $domain=$ENV{'form.domain'};
- }
- 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 $expire = $r->dir_config('lonExpire');
- my $version = $r->dir_config('lonVersion');
-
-# --------------------------------------------- Default values for login fields
-
- my $authusername=($ENV{'form.username'}?$ENV{'form.username'}:'');
- my $authdomain=($ENV{'form.domain'}?$ENV{'form.domain'}:$domain);
-
-# ---------------------------------------------------------- Determine own load
- my $loadavg;
- {
- my $loadfile=Apache::File->new('/proc/loadavg');
- $loadavg=<$loadfile>;
- }
- $loadavg =~ s/\s.*//g;
- my $loadpercent=100*$loadavg/$loadlim;
- my $userloadpercent=&Apache::lonnet::userload();
-
-# ------------------------------------------------------- Do the load balancing
- my $otherserver='http://'.$ENV{'SERVER_NAME'};
- my $firsturl=
- ($ENV{'request.firsturl'}?$ENV{'request.firsturl'}:$ENV{'form.firsturl'});
-# ---------------------------------------- Are we access server and overloaded?
- if (($role eq 'access') &&
- (($userloadpercent>100.0)||($loadpercent>100.0))) {
- my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
- if ($unloaded) { $otherserver=$unloaded; }
- }
-
-# ----------------------------------------------------------- Get announcements
- my $announcements=&Apache::lonnet::getannounce();
-# -------------------------------------------------------- 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; }
-
-# -------------------------------------------------------- Store away log token
- my $logtoken=Apache::lonnet::reply(
- 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
- $lonhost);
-
-# ------------------- If we cannot talk to ourselves, we are in serious trouble
-
- if ($logtoken eq 'con_lost') {
- my $spares='';
- foreach (keys %Apache::lonnet::hostname) {
- if ($_ ne $lonhost) {
- $spares.='
'.
- $Apache::lonnet::hostname{$_}.'';
- if ($Apache::lonnet::spareid{$_}) {
- $spares.=' (preferred)';
- }
- }
- }
- $r->print(<
-The LearningOnline Network with CAPA
-
-
-This LON-CAPA server is temporarily not available for login
-Please attempt to login to one of the following servers:
$spares
-If the problem persists, please contact $servadm.
-
-