--- loncom/auth/lonlogin.pm 2000/01/14 21:12:40 1.2 +++ loncom/auth/lonlogin.pm 2003/08/25 15:24:43 1.46 @@ -1,86 +1,487 @@ # The LearningOnline Network # Login Screen +# +# $Id: lonlogin.pm,v 1.46 2003/08/25 15:24:43 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 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'}.'&'.$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>; - } + { + my $loadfile=Apache::File->new('/proc/loadavg'); + $loadavg=<$loadfile>; + } $loadavg =~ s/\s.*//g; my $loadpercent=100*$loadavg/$loadlim; + my $userloadpercent=&Apache::lonnet::userload(); - my $otherserver=''; +# ------------------------------------------------------- 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)) { - $otherserver=Apache::lonnet::spareserver(); + if (($role eq 'access') && + (($userloadpercent>100.0)||($loadpercent>100.0))) { + $otherserver=Apache::lonnet::spareserver($loadpercent,$userloadpercent); + } + +# ----------------------------------------------------------- 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)]; } -# ---------------------------------------------------------- Print login screen - $r->print(<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.

+ + +ENDTROUBLE + return OK; + } + +# ----------------------------------------------- Apparently we are in business + + my $domainlogo=&Apache::loncommon::domainlogo(); + $servadm=~s/\,/\
/g; + $sysadm=~s/\,/\
/g; + +# --------------------------------------------------- Print login screen header + $r->print(< + The LearningOnline Network with CAPA Login - - - - + + + + + + + + + + + + + + + +
-User Authentication

- -

- - - - - - -
Username:
Password:
Domain:
-
+ENDHEADER +# ---------------------------------------------------- Serve out DES JavaScript + { + my $jsh=Apache::File->new($include."/londes.js"); + $r->print(<$jsh>); + } + +# ----------------------------------------------------------- Front page design + my $pgbg= + ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF'); + my $font= + ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000'); + my $link= + ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF'); + my $vlink= + ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF'); + my $alink=&Apache::loncommon::designparm('login.alink',$domain); + my $mainbg= + ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF'); + my $sidebg= + ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF'); + my $logo=&Apache::loncommon::designparm('login.logo',$domain); + my $img=&Apache::loncommon::designparm('login.img',$domain); + + +# ---------------------------------------------------------- Serve rest of page + $r->print(< + + +ENDSCRIPT + + if ($fullgraph) { + $r->print( + ''); + } + + $r->print(< + + + + + + + + + + + + + + + +ENDSERVERFORM + if ($fullgraph) { $r->print(< + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + -
The Learning Online Network with CAPA
 
+ Accessibility Options +
+ About LON-CAPA + 		+
+ +
+
+ENDTOP +} else { + $r->print('

The LearningOnline Network with CAPA

Text-based Interface Login

'.$announcements); +} + $r->print('
'); + unless ($fullgraph) { + $r->print(<Select Accessibility Options + Suppress rendering of images
+ Suppress Java applets
+ Suppress rendering of embedded multimedia
+ Increase font size
+ Switch to black and white mode
+

If you have accessibility needs that are not addressed by this interface, +please +contact the system administrator at $sysadm.


+ Remember these settings for next login
+ENDACCESSOPTIONS +} else { + $r->print(< + + + + + +ENDNOOPT +} + $r->print(< + + + + + + + + + + + + + + + + + + + + + +
User Authentication

   User Name:
   Password:
   Domain:
   Help +
+ +
+ + +ENDLOGIN + if ($fullgraph) { + $r->print(< + + +
$announcements
+
+ + + + + + + + + + + + + + + + + +
+    Domain:  + +  $domain +
+    Server:  + +  $lonhost ($role) +
+    Load:  + +  $loadpercent percent +
+    User Load:  + +  $userloadpercent percent +
+
+ +    System Administration:
+       $sysadm
+    Server Administration:
+       $servadm
 
+    $version + + 		+$domainlogo
- - - - - - - - -
Domain:$domainLON System Administration:
- $sysadm
- Server Administration:
- $servadm
Server:$lonhost ($role)
Load:$loadpercent percent
-		 -
-Laboratory for
Instructional
Technology in
-Education		 -
- - + + +
 
+ + + ENDDOCUMENT +} + $r->print(''); return OK; }