--- loncom/auth/lonauth.pm	2011/02/24 23:37:50	1.111
+++ loncom/auth/lonauth.pm	2013/11/26 01:19:12	1.128
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.111 2011/02/24 23:37:50 raeburn Exp $
+# $Id: lonauth.pm,v 1.128 2013/11/26 01:19:12 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -40,7 +40,7 @@ use Apache::lonmenu();
 use Apache::createaccount;
 use Fcntl qw(:flock);
 use Apache::lonlocal;
-use Apache::File ();
+use Apache::File();
 use HTML::Entities;
  
 # ------------------------------------------------------------ Successful login
@@ -103,7 +103,7 @@ sub success {
         if ($destsymb =~ /___/) {
             # FIXME Need to deal with encrypted symbs and urls as needed.
             my ($map,$resid,$desturl)=split(/___/,$destsymb);
-            unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
+            unless ($desturl=~/^(adm|editupload|public)/) {
                 $desturl = &Apache::lonnet::clutter($desturl);
             }
             $desturl = &HTML::Entities::encode($desturl,'"<>&');
@@ -138,16 +138,20 @@ sub success {
 
     my %lt=&Apache::lonlocal::texthash(
 				       'wel' => 'Welcome',
-				       'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
 				       'pro' => 'Login problems?',
-				       'log' => 'loginproblems.html',
 				       );
+    my $loginhelp = &loginhelpdisplay($domain);
+    if ($loginhelp) {
+        $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
+    }
+
+    my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 
     $r->print(<<ENDSUCCESS);
 $start_page
 $windowinfo
 <h1>$lt{'wel'}</h1>
-$lt{'mes'}<p>
-<a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
+$welcome
+$loginhelp
 $continuelink
 $end_page
 ENDSUCCESS
@@ -157,25 +161,44 @@ ENDSUCCESS
 
 sub failed {
     my ($r,$message,$form) = @_;
-    my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
-    my $retry = '/adm/login?username='.$form->{'uname'}.
-                '&domain='.$form->{'udom'};
+    (undef,undef,undef,my $clientmathml,my $clientunicode) =
+        &Apache::loncommon::decode_user_agent();
+    my $args = {};
+    if ($clientunicode && !$clientmathml) {
+        $args = {'browser.unicode' => 1};
+    }
+
+    my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
+    my $uname = $form->{'uname'};
+    my $udom;
+    if (&Apache::lonnet::domain($form->{'udom'},'description') ne '') {
+        $udom = $form->{'udom'};
+    }  
+    my $retry = '/adm/login?username='.$form->{'uname'};
+    if ($udom) {
+        $retry .= '&amp;domain='.$form->{'udom'}
+    }
     if (exists($form->{role})) {
-        $retry .= '&role='.$form->{role};
+        $retry .= '&amp;role='.$form->{role};
     }
     if (exists($form->{symb})) {
-        $retry .= '&symb='.$form->{symb};
+        $retry .= '&amp;symb='.$form->{symb};
     }
     my $end_page   = &Apache::loncommon::end_page();
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
+    my $loginhelp = &loginhelpdisplay($udom);
+    if ($loginhelp) {
+        $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';
+    }
+
     $r->print(
        $start_page
       .'<h1>'.&mt('Sorry ...').'</h1>'
       .'<p class="LC_warning">'.&mt($message).'</p>'
       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
       .'</p>'
-      .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
+      .$loginhelp
       .$end_page
     );
  }
@@ -186,18 +209,19 @@ sub reroute {
     my ($r) = @_;
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
-    my $msg='<h1>'.&mt('Sorry ...').'</h1>'
+    my $msg='<b>'.&mt('Sorry ...').'</b><br />'
            .&mt('Please [_1]log in again[_2].');
-    &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
+    &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
 }
 
 # ---------------------------------------------------------------- Main handler
 
 sub handler {
     my $r = shift;
+    my $londocroot = $r->dir_config('lonDocRoot');
     my $form;
 # Are we re-routing?
-    if (-e '/home/httpd/html/lon-status/reroute.txt') {
+    if (-e "$londocroot/lon-status/reroute.txt") {
 	&reroute($r);
 	return OK;
     }
@@ -226,7 +250,7 @@ sub handler {
             }
             $r->print(
                $start_page
-              .'<h1>'.&mt('You are already logged in!').'</h1>'
+              .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
               .'</p>'
@@ -249,7 +273,7 @@ sub handler {
        $value =~ tr/+/ /;
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        $form{$name}=$value;
-    } 
+    }
 
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
 	&failed($r,'Username, password and domain need to be specified.',
@@ -274,7 +298,14 @@ sub handler {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                       $form{'serverid'});
 
-    if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
+    my %sessiondata;
+    if ($form{'iptoken'}) {
+        %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
+        my $delete = &Apache::lonnet::tmpdel($form{'token'});
+    }
+
+    if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 
+        ($tmpinfo eq 'no_such_host')) {
 	&failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
         return OK;
     } else {
@@ -328,21 +359,15 @@ sub handler {
     }
 
 # ---------------------------------------------------------------- Authenticate
-    my @cancreate;
+
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
-    if (ref($domconfig{'usercreation'}) eq 'HASH') {
-        if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
-            if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
-                @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
-            } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && 
-                     ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
-                @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
-            }
-        }
-    }
+    my ($cancreate,$statustocreate) =
+        &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
     my $defaultauth;
-    if (grep(/^login$/,@cancreate)) {
-        $defaultauth = 1;
+    if (ref($cancreate) eq 'ARRAY') {
+        if (grep(/^login$/,@{$cancreate})) {
+            $defaultauth = 1;
+        }
     }
     my $clientcancheckhost = 1;
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
@@ -356,9 +381,7 @@ sub handler {
 		\%form);
         return OK;
     } elsif ($authhost eq 'no_account_on_host') {
-        my %domconfig = 
-            &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
-        if (grep(/^login$/,@cancreate)) {
+        if ($defaultauth) {
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
                 return OK;
@@ -371,9 +394,11 @@ sub handler {
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                                                         $form{'udom'},$origmail);
             my ($contact_email) = split(',',$contacts); 
-            my $output = &Apache::createaccount::username_check($form{'uname'}, 
-                                                                $form{'udom'},$domdesc,'',
-                                                                $lonhost,$contact_email,$contact_name);
+            my $output = 
+                &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
+                                                       $domdesc,'',$lonhost,
+                                                       $contact_email,$contact_name,
+                                                       undef,$statustocreate);
             &Apache::loncommon::content_type($r,'text/html');
             $r->send_http_header;
             &Apache::createaccount::print_header($r,$start_page);
@@ -391,6 +416,15 @@ sub handler {
 	($firsturl=~/^\/adm\/(logout|remote)/)) {
 	$firsturl='/adm/roles';
     }
+
+    my $hosthere;
+    if ($form{'iptoken'}) {
+        if (($sessiondata{'domain'} eq $form{'udom'}) &&
+            ($sessiondata{'username'} eq $form{'uname'})) {
+            $hosthere = 1;
+        }
+    }
+
 # --------------------------------- Are we attempting to login as somebody else?
     if ($form{'suname'}) {
 # ------------ see if the original user has enough privileges to pull this stunt
@@ -414,17 +448,38 @@ sub handler {
 	}
     }
 
-    unless (&check_can_host($r,\%form,$authhost)) {
-        return OK;
+    my ($is_balancer,$otherserver);
+
+    unless ($hosthere) {
+        ($is_balancer,$otherserver) =
+            &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
     }
 
-    if ($r->dir_config("lonBalancer") eq 'yes') {
-	&success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
-		 \%form);
-        my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
-	$r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+    if ($is_balancer) {
+        if (!$otherserver) { 
+            ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
+        }
+        if ($otherserver) {
+            &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
+                     \%form);
+	    $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+        } else {
+            $r->print(&noswitch());
+        }
         return OK;
     } else {
+        if (!&check_can_host($r,\%form,$authhost)) {
+            my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
+            if ($otherserver) {
+                &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
+                         \%form);
+                $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+            } else {
+                $r->print(&noswitch());
+            }
+            return OK;
+        }
+
 # ------------------------------------------------------- Do the load balancing
 
 # ---------------------------------------------------------- Determine own load
@@ -441,6 +496,9 @@ sub handler {
 # ---------------------------------------------------------- Are we overloaded?
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
+            if (!$unloaded) {
+                ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
+            }
             if ($unloaded) {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                          undef,\%form);
@@ -486,7 +544,9 @@ sub check_can_host {
     }
     unless ($canhost) {
         if ($authhost eq 'no_account_on_host') {
-            my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom);
+            my $checkloginvia = 1;
+            my ($login_host,$hostname) = 
+                &Apache::lonnet::choose_server($udom,$checkloginvia);
             &Apache::loncommon::content_type($r,'text/html');
             $r->send_http_header;
             if ($login_host ne '') {
@@ -516,6 +576,42 @@ sub check_can_host {
     return $canhost;
 }
 
+sub noswitch {
+    my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
+                 '<h3>'.&mt('Session unavailable').'</h3>'.
+                 &mt('This LON-CAPA server is unable to host your session.').'<br />'.
+                 '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
+                 &Apache::loncommon::end_page();
+    return $result;
+}
+
+sub loginhelpdisplay {
+    my ($authdomain) = @_;
+    my $login_help = 1;
+    my $lang = &Apache::lonlocal::current_language();
+    if ($login_help) {
+        my $dom = $authdomain;
+        if ($dom eq '') {
+            $dom = &Apache::lonnet::default_login_domain();
+        }
+        my %domconfhash = &Apache::loncommon::get_domainconf($dom);
+        my $loginhelp_url;
+        if ($lang) {
+            $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
+            if ($loginhelp_url ne '') {
+                return $loginhelp_url;
+            }
+        }
+        $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
+        if ($loginhelp_url ne '') {
+            return $loginhelp_url;
+        } else {
+            return '/adm/loginproblems.html';
+        }
+    }
+    return;
+}
+
 1;
 __END__