--- loncom/lonnet/perl/lonnet.pm	2002/11/18 15:16:35	1.301
+++ loncom/lonnet/perl/lonnet.pm	2002/12/06 16:34:55	1.311
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.301 2002/11/18 15:16:35 www Exp $
+# $Id: lonnet.pm,v 1.311 2002/12/06 16:34:55 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -80,7 +80,8 @@ use vars
 qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
    %libserv %pr %prp %metacache %packagetab %titlecache 
    %courselogs %accesshash $processmarker $dumpcount 
-   %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
+   %coursedombuf %coursehombuf %courseresdatacache 
+   %domaindescription);
 use IO::Socket;
 use GDBM_File;
 use Apache::Constants qw(:common :http);
@@ -142,9 +143,9 @@ sub reply {
     unless (defined($hostname{$server})) { return 'no_such_host'; }
     my $answer=subreply($cmd,$server);
     if ($answer eq 'con_lost') {
-       #sleep 5; 
-       #$answer=subreply($cmd,$server);
-       #if ($answer eq 'con_lost') {
+        #sleep 5; 
+        #$answer=subreply($cmd,$server);
+        #if ($answer eq 'con_lost') {
 	#   &logthis("Second attempt con_lost on $server");
         #   my $peerfile="$perlvar{'lonSockDir'}/$server";
         #   my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",
@@ -215,7 +216,8 @@ sub critical {
             $middlename=substr($middlename,0,16);
             $middlename=~s/\W//g;
             my $dfilename=
-             "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
+      "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
+            $dumpcount++;
             {
              my $dfh;
              if ($dfh=Apache::File->new(">$dfilename")) {
@@ -840,7 +842,8 @@ sub tokenwrapper {
     if ($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';
     }
@@ -1542,11 +1545,15 @@ 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 +1563,13 @@ 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
@@ -2715,6 +2720,8 @@ sub courseresdata {
 	if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
 	    $courseresdatacache{$hashid.'.time'}=time;
 	    $courseresdatacache{$hashid}=\%dumpreply;
+	} elsif ($tmp =~ /^(con_lost|no_such_host)/) {
+	    return $tmp;
 	}
     }
     foreach my $item (@which) {
@@ -2841,24 +2848,35 @@ sub EXT {
 	    my $courselevelm=$courseid.'.'.$mapparm;
 
 # ----------------------------------------------------------- first, check user
-	    my %resourcedata=&get('resourcedata',
-				  [$courselevelr,$courselevelm,$courselevel],
-				 $udom,$uname);
-	    if (($resourcedata{$courselevelr}!~/^error\:/) &&
-		($resourcedata{$courselevelr}!~/^con_lost/)) {
-
-		if ($resourcedata{$courselevelr}) {
-		    return $resourcedata{$courselevelr}; }
-		if ($resourcedata{$courselevelm}) {
-		    return $resourcedata{$courselevelm}; }
-		if ($resourcedata{$courselevel}) {
-		    return $resourcedata{$courselevel}; }
-	    } else {
-		if ($resourcedata{$courselevelr}!~/No such file/) {
-		    &logthis("<font color=blue>WARNING:".
-			     " Trying to get resource data for ".
-			     $uname." at ".$udom.": ".
-			     $resourcedata{$courselevelr}."</font>");
+	    #most student don't have any data set, check if there is some data
+            #every thirty minutes
+	    if (!
+		(exists($ENV{'cache.studentresdata'})
+		    && (($ENV{'cache.studentresdata'}+1800) > time))) {
+		my %resourcedata=&get('resourcedata',
+				      [$courselevelr,$courselevelm,$courselevel],
+				      $udom,$uname);
+		my ($tmp)=keys(%resourcedata);
+		if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
+		    if ($resourcedata{$courselevelr}) {
+			return $resourcedata{$courselevelr}; }
+		    if ($resourcedata{$courselevelm}) {
+			return $resourcedata{$courselevelm}; }
+		    if ($resourcedata{$courselevel}) {
+			return $resourcedata{$courselevel}; }
+		} else {
+		    if ($tmp!~/No such file/) {
+			&logthis("<font color=blue>WARNING:".
+				 " Trying to get resource data for ".
+				 $uname." at ".$udom.": ".
+				 $tmp."</font>");
+		    } elsif ($tmp=~/error:No such file/) {
+			$ENV{'cache.studentresdata'}=time;
+			&appenv(('cache.studentresdata'=>
+				 $ENV{'cache.studentresdata'}));
+		    } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
+			return $tmp;
+		    }
 		}
 	    }
 
@@ -3471,6 +3489,7 @@ 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) {