--- loncom/auth/lonlogin.pm 2002/02/19 21:20:48 1.12 +++ loncom/auth/lonlogin.pm 2005/06/14 20:10:50 1.55.2.3 @@ -1,7 +1,7 @@ # The LearningOnline Network # Login Screen # -# $Id: lonlogin.pm,v 1.12 2002/02/19 21:20:48 albertel Exp $ +# $Id: lonlogin.pm,v 1.55.2.3 2005/06/14 20:10:50 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -25,27 +25,98 @@ # # 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 CGI::Cookie(); use Apache::File (); use Apache::lonnet(); use Apache::loncommon(); +use Apache::lonauth(); +use Apache::lonlocal; sub handler { my $r = shift; - $r->content_type('text/html'); &Apache::loncommon::no_cache($r); + &Apache::lonlocal::get_language_handle($r); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; return OK if $r->header_only; - my $iconpath= $r->dir_config('lonIconsURL'); + +# Are we re-routing? + if (-e '/home/httpd/html/lon-status/reroute.txt') { + &Apache::lonauth::reroute($r); + return OK; + } + +# -------------------------------- Prevent users from attempting to login twice + my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); + my $lonid=$cookies{'lonID'}; + my $cookie; + if ($lonid) { + my $handle=$lonid->value; + $handle=~s/\W//g; + my $lonidsdir=$r->dir_config('lonIDsDir'); + if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { +# Indeed, a valid token is found + my $bodytag=&Apache::loncommon::bodytag('Already logged in'); + $r->print(< + +Already logged in + + +$bodytag +

You are already logged in

+

Please either continue the current session or +logout.

+

+Problems?

+ + +ENDFAILED + return OK; + } + } + +# ---------------------------------------------------- No valid token, continue + + &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'); + my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0]; + foreach my $posdom (values(%Apache::lonnet::hostdom)) { + if (lc($posdom) eq lc($testdomain)) { $domain=$posdom; } + } + 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'); @@ -53,22 +124,37 @@ sub handler { 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(); +# ------------------------------------------------------- Do the load balancing my $otherserver='http://'.$ENV{'SERVER_NAME'}; - my $firsturl=$ENV{'request.firsturl'}; + 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))) { + 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', @@ -84,15 +170,55 @@ 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.

+ + +ENDTROUBLE + return OK; + } + +# ----------------------------------------------- Apparently we are in business + + my $domainlogo=&Apache::loncommon::domainlogo($domain); + $servadm=~s/\,/\
/g; + $sysadm=~s/\,/\
/g; + # --------------------------------------------------- Print login screen header $r->print(< + The LearningOnline Network with CAPA Login ENDHEADER @@ -101,21 +227,76 @@ ENDHEADER my $jsh=Apache::File->new($include."/londes.js"); $r->print(<$jsh>); } -# ---------------------------------------------------------- Serve rest of page - $r->print(< +# ----------------------------------------------------------- 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); + +# ----------------------------------------------------------------------- Texts + +my %lt=&Apache::lonlocal::texthash( + 'un' => 'Username', + 'pw' => 'Password', + 'dom' => 'Domain', + 'perc' => 'percent', + 'load' => 'Load', + 'userload' => 'User Load', + 'about' => 'aboutlon.gif', + 'access' => 'accessbutton.gif', + 'auth' => 'userauthentication.gif', + 'log' => 'Log in', + 'help' => 'Help', + 'serv' => 'Server', + 'servadm' => 'Server Administration', + 'sysadm' => 'System Administration'); - +ENDSCRIPT - + if ($fullgraph) { + $r->print( + ''); + } -Accessibility Options -   -About LON-CAPA

-

- - -
- -User Authentication

- -

- - - - - -
- -
- - - - - - + $r->print(< + + + + + + + + + + + + + + + +ENDSERVERFORM + if ($fullgraph) { $r->print(< + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Username:
Password:
Domain:
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

   $lt{'un'}:
   $lt{'pw'}:
   $lt{'dom'}:
   $lt{'help'} +
+ +
+ + +ENDLOGIN + if ($fullgraph) { + $r->print(< + + +
$announcements
+
+ + + + + + + + + + + + + + + + + +
+    $lt{'dom'}:  + +  $domain +
+    $lt{'serv'}:  + +  $lonhost ($role) +
+    $lt{'load'}:  + +  $loadpercent $lt{'perc'} +
+    $lt{'userload'}:  + +  $userloadpercent $lt{'perc'} +
+
+ +    $lt{'sysadm'}:
+       $sysadm
+    $lt{'servadm'}:
+       $servadm
 
+    $version + + 		+$domainlogo +
 
- - - -
- - - - - - - - -
Domain:$domainSystem Administration:
- $sysadm
- Server Administration:
- $servadm
Server:$lonhost ($role)
Load:$loadpercent percent
-		 - -Laboratory for
-Instructional
-Technology in
-Education		 -
- - + + ENDDOCUMENT +} + $r->print(''); return OK; }