--- loncom/auth/switchserver.pm	2010/07/22 21:44:25	1.28
+++ loncom/auth/switchserver.pm	2017/08/08 20:10:55	1.37
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Switch Servers Handler
 #
-# $Id: switchserver.pm,v 1.28 2010/07/22 21:44:25 raeburn Exp $
+# $Id: switchserver.pm,v 1.37 2017/08/08 20:10:55 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -62,8 +62,15 @@ sub do_redirect {
 					'only_body'      => $only_body,});
     my $end_page   = &Apache::loncommon::end_page();
     $r->print($start_page.$extra_text.$end_page);
+    unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) {
+        $r->register_cleanup(\&flush_course_logs);
+    }
     return OK;
+}
 
+sub flush_course_logs {
+    &Apache::lonnet::flushcourselogs();
+    return OK;
 }
 
 sub handler {
@@ -89,28 +96,45 @@ sub handler {
 
     if (!defined($switch_to)) { return FORBIDDEN; }
 
+    my $protocol = 'http';
+    if ($env{'form.otherserver'}) {
+        if ($Apache::lonnet::protocol{$env{'form.otherserver'}} eq 'https') {
+            $protocol = $Apache::lonnet::protocol{$env{'form.otherserver'}};
+        }
+    } 
+
     if ($env{'user.name'} eq 'public'
 	&& $env{'user.domain'} eq 'public') {
-	my $url = 'http://'.$switch_to.$r->uri;
+	my $url = $protocol.'://'.$switch_to.$r->uri;
+        unlink($handle);
+        #expire the cookie
+        my $c = new CGI::Cookie(-name    => 'lonPubID',
+                                -value   => '',
+                                -expires => '-10y',);
+        $r->header_out('Set-cookie' => $c);
 	return &do_redirect($r,$url,1)
     }
 
     my $skip_canhost_check = '';
     if ($env{'form.role'}) {
         if (!exists($env{'user.role.'.$env{'form.role'}})) {
-            return FORBIDDEN;
+            delete($env{'form.role'});
         } else {
             my $now = time;
             my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
             if (($start && $start > $now) || ($end && $end < $now)) {
-                return FORBIDDEN;
+                delete($env{'form.role'});
             } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') {
                 if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) {
                     $skip_canhost_check = 1;
                 }
-            } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)/$}) {
-                if (&Apache::lonnet::homeserver($2,$1) eq $env{'form.otherserver'}) {
-                    $skip_canhost_check = 1; 
+            } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
+                my ($audom,$auname) = ($1,$2);
+                if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) {
+                    if ((&Apache::lonnet::will_trust('othcoau',$audom,$env{'user.domain'})) &&
+                        (&Apache::lonnet::will_trust('coremau',$env{'user.domain'},$audom))) {                             
+                        $skip_canhost_check = 1;
+                    }
                 }
             }
         }
@@ -120,7 +144,11 @@ sub handler {
         my $canhost = 1;
         my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
         my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
-        my @intdoms = &Apache::lonnet::get_internet_names($env{'form.otherserver'});
+        my @intdoms;
+        my $internet_names = &Apache::lonnet::get_internet_names($env{'form.otherserver'});
+        if (ref($internet_names) eq 'ARRAY') {
+            @intdoms = @{$internet_names};
+        }
         unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
             my $serverhomeID = &Apache::lonnet::get_server_homeID($switch_to);
             my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
@@ -139,12 +167,25 @@ sub handler {
 
     #remove session env, and log event
     unlink($handle);
+    if ($env{'user.linkedenv'} ne '') {
+        my $lonidsdir=$r->dir_config('lonIDsDir');
+        if ((-l $env{'user.linkedenv'}) &&
+            (readlink($env{'user.linkedenv'}) eq "$lonidsdir/$handle.id")) {
+            unlink($env{'user.linkedenv'});
+        }
+    }
     my %temp=('switchserver' => time.':'.$env{'form.otherserver'},
 	      $env{'form.role'});
     &Apache::lonnet::put('email_status',\%temp);
+    my $logmsg = "Switch Server to $env{'form.otherserver'}";
+    if ($env{'form.role'}) {
+        $logmsg .= " with role: $env{'form.role'}";
+    } else {
+        $logmsg .= " (no role)";
+    }
+    $logmsg .= ' '.$ENV{'REMOTE_ADDR'};
     &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
-			 $env{'user.home'},
-			 "Switch Server to $env{'form.otherserver'} with role $env{'form.role'} $ENV{'REMOTE_ADDR'}");
+			 $env{'user.home'},$logmsg);
 
     &Apache::loncommon::content_type($r,'text/html');
 
@@ -152,7 +193,13 @@ sub handler {
     my $c = new CGI::Cookie(-name    => 'lonID',
 			    -value   => '',
 			    -expires => '-10y',);
-    $r->header_out('Set-cookie' => $c);
+    $r->headers_out->add('Set-cookie' => $c);
+    if ($env{'user.linkedenv'}) {
+        my $linked = new CGI::Cookie(-name    => 'lonLinkID',
+                                     -value   => '',
+                                     -expires => '-10y',);
+        $r->headers_out->add('Set-cookie' => $linked);
+    }
 
     if ($r->header_only) {
 	$r->send_http_header;
@@ -162,11 +209,13 @@ sub handler {
 	   
 # ---------------------------------------------------------------- Get handover
 
+    my ($is_balancer) = &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'});
     my %info=('ip'       => $ENV{'REMOTE_ADDR'},
 	      'domain'   => $env{'user.domain'},
 	      'username' => $env{'user.name'},
 	      'role'     => $env{'form.role'},
-	      'server'   => $r->dir_config('lonHostID'));
+	      'server'   => $r->dir_config('lonHostID'),
+	      'balancer' => $is_balancer);
     if ($env{'form.origurl'}) {
         $info{'origurl'} = $env{'form.origurl'};
     }
@@ -180,12 +229,11 @@ sub handler {
         $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
     }
     my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
-    my $url ='http://'.$switch_to.'/adm/login?'.
+    my $url =$protocol.'://'.$switch_to.'/adm/login?'.
 	'domain='.$env{'user.domain'}.
 	'&amp;username='.$env{'user.name'}.
 	'&amp;token='.$token;
 # --------------------------------------------------------------- Screen Output
-    &Apache::lonnet::flushcourselogs();
     return &do_redirect($r, $url, 0);
 }