--- loncom/lonnet/perl/lonnet.pm	2002/10/16 14:48:20	1.298
+++ loncom/lonnet/perl/lonnet.pm	2002/12/04 15:23:39	1.304
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.298 2002/10/16 14:48:20 matthew Exp $
+# $Id: lonnet.pm,v 1.304 2002/12/04 15:23:39 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -77,8 +77,8 @@ use Apache::File;
 use LWP::UserAgent();
 use HTTP::Headers;
 use vars 
-qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom 
-   %libserv %pr %prp %metacache %packagetab 
+qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
+   %libserv %pr %prp %metacache %packagetab %titlecache 
    %courselogs %accesshash $processmarker $dumpcount 
    %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
 use IO::Socket;
@@ -840,7 +840,8 @@ sub tokenwrapper {
     if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
 	&appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
         return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
-               (($uri=~/\?/)?'&':'?').'token='.$token;
+               (($uri=~/\?/)?'&':'?').'token='.$token.
+                               '&tokenissued='.$perlvar{'lonHostID'};
     } else {
 	return '/adm/notfound.html';
     }
@@ -1103,7 +1104,7 @@ sub devalidate {
     if ($cid) {
 	my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
         my $status=
-	    &del('nohist_calculatedsheet',
+	    &del('nohist_calculatedsheets',
 		 [$key.'studentcalc'],
 		 $ENV{'course.'.$cid.'.domain'},
 		 $ENV{'course.'.$cid.'.num'})
@@ -1542,11 +1543,15 @@ sub coursedescription {
     $courseid=~s/\_/\//g;
     my ($cdomain,$cnum)=split(/\//,$courseid);
     my $chome=&homeserver($cnum,$cdomain);
+    my $normalid=$cdomain.'_'.$cnum;
+    # need to always cache even if we get errors otherwise we keep 
+    # trying and trying and trying to get the course description.
+    my %envhash=();
+    my %returnhash=();
+    $envhash{'course.'.$normalid.'.last_cache'}=time;
     if ($chome ne 'no_host') {
-       my %returnhash=&dump('environment',$cdomain,$cnum);
+       %returnhash=&dump('environment',$cdomain,$cnum);
        if (!exists($returnhash{'con_lost'})) {
-           my $normalid=$cdomain.'_'.$cnum;
-           my %envhash=();
            $returnhash{'home'}= $chome;
 	   $returnhash{'domain'} = $cdomain;
 	   $returnhash{'num'} = $cnum;
@@ -1556,15 +1561,13 @@ sub coursedescription {
            $returnhash{'url'}=&clutter($returnhash{'url'});
            $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
 	       $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
-           $envhash{'course.'.$normalid.'.last_cache'}=time;
            $envhash{'course.'.$normalid.'.home'}=$chome;
            $envhash{'course.'.$normalid.'.domain'}=$cdomain;
            $envhash{'course.'.$normalid.'.num'}=$cnum;
-           &appenv(%envhash);
-           return %returnhash;
        }
     }
-    return ();
+    &appenv(%envhash);
+    return %returnhash;
 }
 
 # -------------------------------------------------------- Get user privileges
@@ -1802,7 +1805,9 @@ sub allowed {
 
     if ($priv eq 'bre') {
         my $copyright=&metadata($uri,'copyright');
-	if ($copyright eq 'public') { return 'F'; }
+	if (($copyright eq 'public') && (!$ENV{'request.course.id'})) { 
+           return 'F'; 
+        }
         if ($copyright eq 'priv') {
             $uri=~/([^\/]+)\/([^\/]+)\//;
 	    unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
@@ -3096,6 +3101,33 @@ sub metadata_generate_part0 {
     }
 }
 
+# ------------------------------------------------- Get the title of a resource
+
+sub gettitle {
+    my $urlsymb=shift;
+    my $symb=&symbread($urlsymb);
+    unless ($symb) {
+	unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
+        return &metadata($urlsymb,'title'); 
+    }
+    if ($titlecache{$symb}) { return $titlecache{$symb}; }
+    my ($map,$resid,$url)=split(/\_\_\_/,$symb);
+    my $title='';
+    my %bighash;
+    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+                            &GDBM_READER(),0640)) {
+        my $mapid=$bighash{'map_pc_'.&clutter($map)};
+        $title=$bighash{'title_'.$mapid.'.'.$resid};
+        untie %bighash;
+    }
+    if ($title) {
+        $titlecache{$symb}=$title;
+        return $title;
+    } else {
+	return &metadata($urlsymb,'title');
+    }
+}
+    
 # ------------------------------------------------- Update symbolic store links
 
 sub symblist {
@@ -3442,12 +3474,14 @@ BEGIN {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
 
     while (my $configline=<$config>) {
+       next if ($configline =~ /^(\#|\s*$)/);
        chomp($configline);
        my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
        if ($id && $domain && $role && $name && $ip) {
 	 $hostname{$id}=$name;
 	 $hostdom{$id}=$domain;
 	 $hostip{$id}=$ip;
+	 $iphost{$ip}=$id;
 	 if ($domdescr) { $domaindescription{$domain}=$domdescr; }
 	 if ($role eq 'library') { $libserv{$id}=$name; }
        } else {