--- loncom/lonnet/perl/lonnet.pm	2021/08/04 21:06:33	1.1463
+++ loncom/lonnet/perl/lonnet.pm	2021/11/08 03:02:14	1.1470
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1463 2021/08/04 21:06:33 raeburn Exp $
+# $Id: lonnet.pm,v 1.1470 2021/11/08 03:02:14 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2304,7 +2304,7 @@ sub retrieve_inst_usertypes {
 
 sub is_domainimage {
     my ($url) = @_;
-    if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+[^/]-) {
+    if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo|login)/+[^/]-) {
         if (&domain($1) ne '') {
             return '1';
         }
@@ -8855,7 +8855,11 @@ sub get_commblock_resources {
     my ($blocks) = @_;
     my %blockers = ();
     return %blockers unless ($env{'request.course.id'});
-    return %blockers if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
+    my $courseurl = &courseid_to_courseurl($env{'request.course.id'});
+    if ($env{'request.course.sec'}) {
+        $courseurl .= '/'.$env{'request.course.sec'};
+    }
+    return %blockers if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseurl} =~/evb\&([^\:]*)/);
     my %commblocks;
     if (ref($blocks) eq 'HASH') {
         %commblocks = %{$blocks};
@@ -8979,8 +8983,12 @@ sub has_comm_blocking {
     my @blockers;
     return unless ($env{'request.course.id'});
     return unless ($priv eq 'bre');
-    return if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
     return if ($env{'request.state'} eq 'construct');
+    my $courseurl = &courseid_to_courseurl($env{'request.course.id'});
+    if ($env{'request.course.sec'}) {
+        $courseurl .= '/'.$env{'request.course.sec'};
+    }
+    return if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseurl} =~/evb\&([^\:]*)/);
     my %blockinfo;
     if (ref($blocks) eq 'HASH') {
         %blockinfo = &get_commblock_resources($blocks);
@@ -12323,7 +12331,7 @@ sub EXT {
 	    if ( (defined($Apache::lonhomework::parsing_a_problem)
 		  || defined($Apache::lonhomework::parsing_a_task))
 		 &&
-		 ($symbparm eq &symbread()) ) {	
+		 ($symbparm eq &symbread()) ) {
 		# if we are in the middle of processing the resource the
 		# get the value we are planning on committing
                 if (defined($Apache::lonhomework::results{$qualifierrest})) {
@@ -14387,10 +14395,15 @@ sub machine_ids {
 
 sub additional_machine_domains {
     my @domains;
-    open(my $fh,"<","$perlvar{'lonTabDir'}/expected_domains.tab");
-    while( my $line = <$fh>) {
-        $line =~ s/\s//g;
-        push(@domains,$line);
+    if (-e "$perlvar{'lonTabDir'}/expected_domains.tab") {
+        if (open(my $fh,"<","$perlvar{'lonTabDir'}/expected_domains.tab")) {
+            while (my $line = <$fh>) {
+                chomp($line);           
+                $line =~ s/\s//g;
+                push(@domains,$line);
+            }
+            close($fh);
+        }
     }
     return @domains;
 }
@@ -14586,7 +14599,6 @@ sub get_proxy_alias {
             my $cachetime = 60*60*24;
             my %domconfig =
                 &Apache::lonnet::get_dom('configuration',['wafproxy'],$dom);
-            my $alias;
             if (ref($domconfig{'wafproxy'}) eq 'HASH') {
                 if (ref($domconfig{'wafproxy'}{'alias'}) eq 'HASH') {
                     $alias = $domconfig{'wafproxy'}{'alias'}{$lonid};
@@ -14604,7 +14616,7 @@ sub use_proxy_alias {
     if ($alias) {
         my $dom = &host_domain($lonid);
         if ($dom ne '') {
-            my $proxyinfo = &get_proxy_settings($dom );
+            my $proxyinfo = &get_proxy_settings($dom);
             my ($vpnint,$remote_ip);
             if (ref($proxyinfo) eq 'HASH') {
                 $vpnint = $proxyinfo->{'vpnint'};
@@ -14619,6 +14631,81 @@ sub use_proxy_alias {
     }
     return;
 }
+
+sub alias_shibboleth {
+    my ($lonid) = @_;
+    if ($lonid eq '') {
+        $lonid = $perlvar{'lonHostID'};
+    }
+    if (!defined(&hostname($lonid))) {
+        return;
+    }
+    if ($lonid ne '') {
+        my ($use_alias,$cached) = &is_cached_new('proxysaml',$lonid);
+        if ($cached) {
+            return $use_alias;
+        }
+        my $dom = &Apache::lonnet::host_domain($lonid);
+        if ($dom ne '') {
+            my $cachetime = 60*60*24;
+            my %domconfig =
+                &Apache::lonnet::get_dom('configuration',['wafproxy'],$dom);
+            if (ref($domconfig{'wafproxy'}) eq 'HASH') {
+                if (ref($domconfig{'wafproxy'}{'saml'}) eq 'HASH') {
+                    $use_alias = $domconfig{'wafproxy'}{'saml'}{$lonid};
+                }
+            }
+            return &do_cache_new('proxysaml',$lonid,$use_alias,$cachetime);
+        }
+    }
+    return;
+}
+
+sub get_saml_landing {
+    my ($lonid) = @_;
+    if ($lonid eq '') {
+        my $defdom = &default_login_domain();
+        my @hosts = &current_machine_ids();
+        if (@hosts > 1) {
+            foreach my $hostid (@hosts) {
+                if (&host_domain($hostid) eq $defdom) {
+                    $lonid = $hostid;
+                    last;
+                }
+            }
+        } else {
+            $lonid = $perlvar{'lonHostID'};
+        }
+        if ($lonid) {
+            unless (&Apache::lonnet::host_domain($lonid) eq $defdom) {
+                return;
+            }
+        } else {
+            return;
+        }
+    } elsif (!defined(&hostname($lonid))) {
+        return;
+    }
+    my ($landing,$cached) = &is_cached_new('samllanding',$lonid);
+    if ($cached) {
+        return $landing;
+    }
+    my $dom = &Apache::lonnet::host_domain($lonid);
+    if ($dom ne '') {
+        my $cachetime = 60*60*24;
+        my %domconfig =
+            &Apache::lonnet::get_dom('configuration',['login'],$dom);
+        if (ref($domconfig{'login'}) eq 'HASH') {
+            if (ref($domconfig{'login'}{'saml'}) eq 'HASH') {
+                if (ref($domconfig{'login'}{'saml'}{$lonid}) eq 'HASH') {
+                    $landing = 1;
+                }
+            }
+        }
+        return &do_cache_new('samllanding',$lonid,$landing,$cachetime);
+    }
+    return;
+}
 
 # ------------------------------------------------------------- Declutters URLs