--- loncom/auth/lonlogin.pm 2000/11/09 19:42:44 1.9
+++ loncom/auth/lonlogin.pm 2003/02/17 23:25:59 1.32
@@ -1,22 +1,73 @@
# The LearningOnline Network
# Login Screen
+#
+# $Id: lonlogin.pm,v 1.32 2003/02/17 23:25:59 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 Gerd Kortemeyer
+# 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;
- my $iconpath= $r->dir_config('lonIconsURL');
+
+ &Apache::loncommon::get_unprocessed_cgi
+ ($ENV{'QUERY_STRING'},['interface','username','domain','firsturl']);
+
+# ----------------------------------------------------------- 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 $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':8080'.
+ $r->dir_config('lonIconsURL');
my $domain = $r->dir_config('lonDefDomain');
my $role = $r->dir_config('lonRole');
my $loadlim = $r->dir_config('lonLoadLim');
@@ -26,6 +77,12 @@ sub handler {
my $tabdir = $r->dir_config('lonTabDir');
my $include = $r->dir_config('lonIncludes');
+# --------------------------------------------- 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');
@@ -34,11 +91,13 @@ sub handler {
$loadavg =~ s/\s.*//g;
my $loadpercent=100*$loadavg/$loadlim;
- my $otherserver='';
- my $firsturl=$ENV{'request.firsturl'};
+# ------------------------------------------------------- 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 (($role eq 'access') && ($loadpercent>100.0)) {
- $otherserver=Apache::lonnet::spareserver();
+ $otherserver=Apache::lonnet::spareserver($loadpercent);
}
# -------------------------------------------------------- Set login parameters
@@ -56,11 +115,47 @@ sub handler {
}
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.
+
+