--- loncom/auth/switchserver.pm	2022/08/30 16:20:17	1.35.2.6.2.3
+++ loncom/auth/switchserver.pm	2018/12/02 13:52:56	1.44
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Switch Servers Handler
 #
-# $Id: switchserver.pm,v 1.35.2.6.2.3 2022/08/30 16:20:17 raeburn Exp $
+# $Id: switchserver.pm,v 1.44 2018/12/02 13:52:56 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,7 +29,7 @@
 package Apache::switchserver;
 
 use strict;
-use Apache::Constants qw(:common :remotehost);
+use Apache::Constants qw(:common);
 use Apache::lonnet;
 use Digest::MD5 qw(md5_hex);
 use CGI::Cookie();
@@ -54,15 +54,11 @@ sub init_env {
 }
 
 sub do_redirect {
-    my ($r,$url,$only_body,$extra_text,$write_to_opener) = @_;
+    my ($r,$url,$only_body,$extra_text) = @_;
     $r->send_http_header;
-    my $delay = 0.5;
-    if ($only_body && !$extra_text) {
-        $delay = 0;
-    }
     my $start_page = 
 	&Apache::loncommon::start_page('Switching Server ...',undef,
-				       {'redirect'       => [$delay,$url,'',$write_to_opener],
+				       {'redirect'       => [0.5,$url],
 					'only_body'      => $only_body,});
     my $end_page   = &Apache::loncommon::end_page();
     $r->print($start_page.$extra_text.$end_page);
@@ -72,24 +68,6 @@ sub do_redirect {
     return OK;
 }
 
-sub balancer_cookieid {
-    my ($r,$desthost,$uname,$udom) = @_;
-    my @hosts = &Apache::lonnet::current_machine_ids();
-    my $newcookieid;
-    unless (grep(/^\Q$desthost\E$/,@hosts)) {
-        my $balancedir=$r->dir_config('lonBalanceDir');
-        $newcookieid = &md5_hex(&md5_hex(time.{}.rand().$$));
-        my $cookie = $udom.'_'.$uname.'_'.$newcookieid;
-        my $balcookie = "balanceID=$cookie; path=/; HttpOnly;";
-        if (open(my $fh,'>',"$balancedir/$cookie.id")) {
-            print $fh $desthost;
-            close($fh);
-            $r->headers_out->add('Set-cookie' => $balcookie);
-        }
-    }
-    return $newcookieid;
-}
-
 sub flush_course_logs {
     &Apache::lonnet::flushcourselogs();
     return OK;
@@ -97,12 +75,12 @@ sub flush_course_logs {
 
 sub handler {
     my ($r) = @_;
-
+    
     my $handle=&init_env($r);
     if (!defined($handle)) { return FORBIDDEN; }
 
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
-				['otherserver','role','origurl','symb','lcssowin']);
+				['otherserver','role','origurl','symb']);
 
     my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
     if (! $env{'form.otherserver'}) {
@@ -111,7 +89,7 @@ sub handler {
 						   $env{'user.name'});
 	if (! $env{'form.otherserver'}) {
 	    $env{'form.otherserver'} = 
-		&Apache::lonnet::spareserver($r,30000,undef,1);
+		&Apache::lonnet::spareserver(30000,undef,1);
 	}
 	$switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
     }
@@ -123,10 +101,6 @@ sub handler {
         if ($Apache::lonnet::protocol{$env{'form.otherserver'}} eq 'https') {
             $protocol = $Apache::lonnet::protocol{$env{'form.otherserver'}};
         }
-        unless ($env{'form.otherserver'} eq $r->dir_config('lonHostID')) {
-            my $alias = &Apache::lonnet::use_proxy_alias($r,$env{'form.otherserver'});
-            $switch_to = $alias if ($alias ne '');
-        }
     }
 
     if ($env{'user.name'} eq 'public'
@@ -142,11 +116,11 @@ sub handler {
     }
 
     my $skip_canhost_check = '';
-    my $now = time;
     if ($env{'form.role'}) {
         if (!exists($env{'user.role.'.$env{'form.role'}})) {
             delete($env{'form.role'});
         } else {
+            my $now = time;
             my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
             if (($start && $start > $now) || ($end && $end < $now)) {
                 delete($env{'form.role'});
@@ -155,8 +129,12 @@ sub handler {
                     $skip_canhost_check = 1;
                 }
             } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
-                if (&Apache::lonnet::homeserver($2,$1) eq $env{'form.otherserver'}) {
-                    $skip_canhost_check = 1; 
+                my ($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;
+                    }
                 }
             }
         }
@@ -198,17 +176,21 @@ sub handler {
             }
         }
     }
+    my $now = time;
     my %temp=('switchserver' => $now.':'.$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: $env{'form.role'}";
+    } elsif (($env{'form.lti.reqcrs'}) && ($env{'form.lti.reqrole'} eq 'cc')) {
+        $logmsg .= " to create new LTI course";
+    } elsif ($env{'form.lti.selfenrollrole'}) {
+        $logmsg .= " to selfenroll with role: $env{'form.lti.selfenrollrole'}";
     } else {
         $logmsg .= " (no role)";
     }
-    my $ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
-    $logmsg .= ' '.$ip;
+    $logmsg .= ' '.$ENV{'REMOTE_ADDR'};
     &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
 			 $env{'user.home'},$logmsg);
 
@@ -228,41 +210,57 @@ sub handler {
 	return OK;
     }
 # -------------------------------------------------------- Menu script and info
-
+	   
 # ---------------------------------------------------------------- Get handover
 
-    my ($is_balancer,$setcookie,$newcookieid,$otherbalcookie);
-    my $only_body = 0;
-    ($is_balancer,undef,$setcookie) =
-        &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'},'switchserver');
+    my $newcookieid;
+    my ($is_balancer,$posshost,$setcookie,$offloadto,$dom_balancers) =
+        &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'});
     if ($is_balancer && $setcookie && $env{'form.otherserver'}) {
 
         # Set a balancer cookie unless browser already sent LON-CAPA load balancer
         # cookie which points at the target server
         my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
 
-        if (($found_server eq $env{'form.otherserver'}) &&
-            ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
-            $only_body = 1;
-        } else {
-            $newcookieid = &balancer_cookieid($r,$env{'form.otherserver'},
-                                              $env{'user.name'},$env{'user.domain'});
+        unless (($found_server eq $env{'form.otherserver'}) &&
+                ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
+            my @hosts = &Apache::lonnet::current_machine_ids();
+            my $desthost = $env{'form.otherserver'};
+            unless (grep(/^\Q$desthost\E$/,@hosts)) {
+                my $balancedir=$r->dir_config('lonBalanceDir');
+                $newcookieid = &md5_hex(&md5_hex($now.{}.rand().$$));
+                my $cookie = $env{'user.domain'}.'_'.$env{'user.name'}.'_'.$newcookieid;
+                my $balcookie = "balanceID=$cookie; path=/; HttpOnly;";
+                if (open(my $fh,'>',"$balancedir/$cookie.id")) {
+                    print $fh $env{'form.otherserver'};
+                    close($fh);
+                }
+                $r->headers_out->add('Set-cookie' => $balcookie);
+            }
         }
     }
-    if ((!$is_balancer) && ($env{'request.balancercookie'})) {
-        $otherbalcookie = $env{'request.balancercookie'};
-    }
 
-    my %info=('ip'       => $ip,
-	      'domain'   => $env{'user.domain'},
-	      'username' => $env{'user.name'},
-	      'role'     => $env{'form.role'},
-	      'server'   => $r->dir_config('lonHostID'),
-	      'balancer' => $is_balancer);
+    my %info=('ip'            => $ENV{'REMOTE_ADDR'},
+              'domain'        => $env{'user.domain'},
+              'username'      => $env{'user.name'},
+              'home'          => $env{'user.home'},
+              'role'          => $env{'form.role'},
+              'server'        => $r->dir_config('lonHostID'),
+              'balancer'      => $is_balancer,
+              'dom_balancers' => $dom_balancers,
+              'offloadto'     => '');
+    if (ref($offloadto) eq 'HASH') {
+        foreach my $key (keys(%{$offloadto})) {
+            if (ref($offloadto->{$key}) eq 'ARRAY') {
+                $info{'offloadto'} .= $key.'='.join(',',@{$offloadto->{$key}}).'&';
+            }
+        }
+        $info{'offloadto'} =~ s/\&$//;
+    } elsif (ref($offloadto) eq 'ARRAY') {
+        $info{'offloadto'} = join(',',@{$offloadto});
+    }
     if ($newcookieid) {
         $info{'balcookie'} = $newcookieid;
-    } elsif ($otherbalcookie) {
-        $info{'otherbalcookie'} = $otherbalcookie;
     }
     if ($env{'form.origurl'}) {
         $info{'origurl'} = $env{'form.origurl'};
@@ -270,52 +268,52 @@ sub handler {
     if ($env{'form.symb'}) {
         $info{'symb'} = $env{'form.symb'};
     }
-    my $ssologoutscript = '';
-    my $write_to_opener;
     if ($env{'request.sso.login'}) {
 	$info{'sso.login'} = $env{'request.sso.login'};
-        if (defined($r->dir_config("lonSSOUserLogoutScriptFile_$info{domain}"))) {
-            if (open(my $fh,'<',$r->dir_config("lonSSOUserLogoutScriptFile_$info{domain}"))) {
-                $ssologoutscript .= join('',<$fh>);
-                close($fh);
-            }
-        }
-        if (defined($r->dir_config('lonSSOUserLogoutScriptFile'))) {
-            if (open(my $fh,'<',$r->dir_config('lonSSOUserLogoutScriptFile'))) {
-                $ssologoutscript .= join('',<$fh>);
-                close($fh);
-            }
-        }
     }
     if ($env{'request.sso.reloginserver'}) {
         $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
     }
-    if ($env{'request.linkprot'}) {
-        $info{'linkprot'} = $env{'request.linkprot'};
-        foreach my $item ('linkprotuser','linkprotexit') {
-            if ($env{'request.'.$item}) {
-                $info{$item} = $env{'request.'.$item};
-            }
-        }
-    } elsif ($env{'request.linkkey'} ne '') {
-        $info{'linkkey'} = $env{'request.linkkey'};
+    if ($env{'request.lti.login'}) {
+        $info{'lti.login'} = $env{'request.lti.login'};
     }
-    if ($env{'request.deeplink.login'}) {
-        $info{'deeplink.login'} = $env{'request.deeplink.login'};
+    if ($env{'request.lti.uri'}) {
+        $info{'lti.uri'} = $env{'request.lti.uri'};
     }
-    my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
-    my @args = ("domain=$env{'user.domain'}",
-                "username=$env{'user.name'}",
-                "token=$token");
-    my $url = $protocol.'://'.$switch_to.'/adm/login?';
-    if ($env{'form.lcssowin'}) {
-        $url .= join('&',@args);
-        $only_body = 1;
-    } else {
-        $url .= join('&amp;',@args);
+    if ($env{'request.lti.reqcrs'}) {
+        $info{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
     }
+    if ($env{'request.lti.reqrole'}) {
+        $info{'lti.reqrole'} = $env{'request.lti.reqrole'};
+    }
+    if ($env{'request.lti.selfenrollrole'}) {
+        $info{'lti.selfenrollrole'} = $env{'request.lti.selfenrollrole'};
+    }
+    if ($env{'request.lti.sourcecrs'}) {
+        $info{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
+    }
+    if ($env{'request.lti.passbackid'}) {
+        $info{'lti.passbackid'} = $env{'request.lti.passbackid'};
+    }
+    if ($env{'request.lti.passbackurl'}) {
+        $info{'lti.passbackurl'} = $env{'request.lti.passbackurl'};
+    }
+    if ($env{'request.lti.rosterid'}) {
+        $info{'lti.rosterid'} = $env{'request.lti.rosterid'};
+    }
+    if ($env{'request.lti.rosterurl'}) {
+        $info{'lti.rosterurl'} = $env{'request.lti.rosterurl'};
+    }
+    if ($env{'request.lti.target'}) {
+        $info{'lti.target'} = $env{'request.lti.target'};
+    }
+    my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
+    my $url =$protocol.'://'.$switch_to.'/adm/login?'.
+	'domain='.$env{'user.domain'}.
+	'&amp;username='.$env{'user.name'}.
+	'&amp;token='.$token;
 # --------------------------------------------------------------- Screen Output
-    return &do_redirect($r, $url, $only_body, $ssologoutscript, $env{'form.lcssowin'});
+    return &do_redirect($r, $url, 0);
 }
 
 1;