--- loncom/auth/switchserver.pm	2024/10/09 15:49:17	1.35.2.6.2.8
+++ loncom/auth/switchserver.pm	2017/11/30 15:14:51	1.38
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Switch Servers Handler
 #
-# $Id: switchserver.pm,v 1.35.2.6.2.8 2024/10/09 15:49:17 raeburn Exp $
+# $Id: switchserver.pm,v 1.38 2017/11/30 15:14:51 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,11 +29,9 @@
 package Apache::switchserver;
 
 use strict;
-use Apache::Constants qw(:common :remotehost);
+use Apache::Constants qw(:common);
 use Apache::lonnet;
-use Apache::loncommon;
 use Apache::lonmenu;
-use Digest::MD5 qw(md5_hex);
 use CGI::Cookie();
 use Apache::lonlocal;
 use LONCAPA qw(:DEFAULT :match);
@@ -51,24 +49,17 @@ sub init_env {
     }
     my $lonidsdir=$r->dir_config('lonIDsDir');
     &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
-
+    
     return $r->dir_config('lonIDsDir')."/$handle.id";
 }
 
 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,1],
-					'only_body'      => $only_body,
-                                        'switchserver'   => 1,
-                                        'links_disabled' => 1,
-                                        'no_inline_link' => 1,});
+				       {'redirect'       => [0.5,$url],
+					'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')) {
@@ -77,24 +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;
@@ -102,12 +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','edit']);
+				['otherserver','role','origurl','symb']);
 
     my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
     if (! $env{'form.otherserver'}) {
@@ -116,7 +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'});
     }
@@ -128,11 +101,7 @@ 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'
 	&& $env{'user.domain'} eq 'public') {
@@ -147,11 +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'});
@@ -160,222 +129,108 @@ 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;
+                    }
                 }
             }
         }
     }
 
     unless ($skip_canhost_check) {
-        my $canhost = &Apache::lonnet::can_switchserver($env{'user.domain'},$env{'form.otherserver'});
-        unless ($canhost) {
-            if (($env{'request.course.id'}) && ($env{'form.symb'} ne '') &&
-                (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
-                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
-                my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
-                if (($cdom ne '') && ($cnum ne '') && ($env{'form.role'} =~ m{^([^.]+)\Q./$cdom/$cnum\E$})) {
-                    my $symb = &Apache::lonnet::symbclean($env{'form.symb'});
-                    my ($map,$idx,$url) = &Apache::lonnet::decode_symb($symb);
-                    if (&Apache::lonnet::symbverify($symb,$url)) {
-                        my $fileloc = &Apache::lonnet::declutter(&Apache::lonnet::filelocation("",$url));
-                        my $resurl = &Apache::lonnet::clutter($url);
-                        if ($resurl =~ m{^/res/($match_domain)/($match_username)/}) {
-                            my ($audom,$auname) = ($1,$2);
-                            if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) {
-                                my @possroles = ("user.role.au./$audom/","user.role.ca./$audom/$auname","user.role.aa./$audom/$auname");
-                                my $hasrole;
-                                foreach my $rolekey (@possroles) {
-                                    if (exists($env{$rolekey})) {
-                                        my ($start,$end) = split(/\./,$env{$rolekey});
-                                        unless (($start && $start > $now) || ($end && $end < $now)) {
-                                            $hasrole = $rolekey;
-                                        }
-                                        if ($hasrole) {
-                                            $hasrole =~ s/^\Quser.role.\E//;
-                                            last;
-                                        }
-                                    }
-                                }
-                                if ($hasrole) {
-                                    $env{'form.role'} = $hasrole;
-                                    $env{'form.origurl'} = &Apache::lonnet::deversion($resurl);
-                                    $env{'form.origurl'} =~ s{^/res/}{/priv/};
-                                    delete($env{'form.symb'});
-                                    $canhost = 1;
-                                    if ($env{'form.edit'}) {
-                                        my $ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
-                                        my %info=('ip'            => $ip,
-                                                  'domain'        => $env{'user.domain'},
-                                                  'username'      => $env{'user.name'},
-                                                  'home'          => $env{'user.home'},
-                                                  'role'          => $env{'form.role'},
-                                                  'server'        => $r->dir_config('lonHostID'),
-                                                  'origurl'       => $env{'form.origurl'});
-                                        &Apache::loncommon::content_type($r,'text/html');
-                                        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='.$token;
-                                        return &do_redirect($r,$url,0);
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
+        my $canhost = 1;
+        my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
+        my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
+        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);
+            my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
+            my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
+            my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'});
+            $canhost = 
+                &Apache::lonnet::can_host_session($env{'user.domain'},
+                                                  $env{'form.otherserver'},
+                                                  $remoterev,
+                                                  $udomdefaults{'remotesessions'},
+                                                  $defdomdefaults{'hostedsessions'});
         }
         unless ($canhost) { return FORBIDDEN; }
     }
 
     #remove session env, and log event
-    if (unlink($handle)) {
-        if ($env{'user.linkedenv'} ne '') {
-            my $lonidsdir=$r->dir_config('lonIDsDir');
-            if (($env{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
-                (-l "$lonidsdir/$env{'user.linkedenv'}.id") &&
-                (readlink("$lonidsdir/$env{'user.linkedenv'}.id") eq $handle)) {
-                unlink("$lonidsdir/$env{'user.linkedenv'}.id");
-            }
+    unlink($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' => $now.':'.$env{'form.otherserver'},
+    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: $env{'form.role'}";
-    } elsif (($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);
 
     &Apache::loncommon::content_type($r,'text/html');
 
-    #expire the cookies
-    my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
-    foreach my $name (keys(%cookies)) {
-        next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
-        my $c = new CGI::Cookie(-name    => $name,
-                                -value   => '',
-                                -expires => '-10y',);
-        $r->headers_out->add('Set-cookie' => $c);
+    #expire the cookie
+    my $c = new CGI::Cookie(-name    => 'lonID',
+			    -value   => '',
+			    -expires => '-10y',);
+    $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;
 	return OK;
     }
 # -------------------------------------------------------- Menu script and info
-
-    my $windowinfo = &Apache::lonmenu::close();
-
+	   
 # ---------------------------------------------------------------- Get handover
 
-    my ($is_balancer,$setcookie,$newcookieid,$otherbalcookie);
-    my $only_body = 0;
-    ($is_balancer,undef,$setcookie) =
-        &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'},'switchserver');
-    if ($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'});
-        }
-    }
-    if ((!$is_balancer) && ($env{'request.balancercookie'})) {
-        $otherbalcookie = $env{'request.balancercookie'};
-    }
-
-    my %info=('ip'       => $ip,
+    my ($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'),
 	      'balancer' => $is_balancer);
-    if ($newcookieid) {
-        $info{'balcookie'} = $newcookieid;
-    } elsif ($otherbalcookie) {
-        $info{'otherbalcookie'} = $otherbalcookie;
-    }
     if ($env{'form.origurl'}) {
         $info{'origurl'} = $env{'form.origurl'};
-        if ($env{'form.origurl'} eq '/adm/email') {
-            if ($env{'request.display'} && ($env{'request.mailrecip'} eq "$env{'user.name'}:$env{'user.domain'}")) {
-                $info{'display'} = &escape($env{'request.display'});
-                $info{'mailrecip'} = &escape($env{'request.mailrecip'});
-            }
-        }
     }
     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 $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
-            if ($env{'request.'.$item}) {
-                $info{$item} = $env{'request.'.$item};
-            }
-        }
-    } elsif ($env{'request.linkkey'} ne '') {
-        $info{'linkkey'} = $env{'request.linkkey'};
-    }
-    if ($env{'request.deeplink.login'}) {
-        $info{'deeplink.login'} = $env{'request.deeplink.login'};
-    }
     if ($env{'request.lti.login'}) {
         $info{'lti.login'} = $env{'request.lti.login'};
     }
-    if ($env{'request.lti.uri'}) {
-        $info{'lti.uri'} = $env{'request.lti.uri'};
-    }
-    if ($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'} = $env{'request.lti.passbackid'};
     }
@@ -388,23 +243,13 @@ sub handler {
     if ($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 @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);
-    }
+    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, $windowinfo.$ssologoutscript,
-                        $env{'form.lcssowin'});
+    return &do_redirect($r, $url, 0);
 }
 
 1;