--- loncom/lonnet/perl/lonnet.pm	2003/09/25 20:02:54	1.423
+++ loncom/lonnet/perl/lonnet.pm	2003/11/12 19:51:43	1.448
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.423 2003/09/25 20:02:54 albertel Exp $
+# $Id: lonnet.pm,v 1.448 2003/11/12 19:51:43 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,55 +25,16 @@
 #
 # http://www.lon-capa.org/
 #
-# 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
-# 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
-# 11/8,11/16,11/18,11/22,11/23,12/22,
-# 01/06,01/13,02/24,02/28,02/29,
-# 03/01,03/02,03/06,03/07,03/13,
-# 04/05,05/29,05/31,06/01,
-# 06/05,06/26 Gerd Kortemeyer
-# 06/26 Ben Tyszka
-# 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
-# 08/14 Ben Tyszka
-# 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
-# 10/04 Gerd Kortemeyer
-# 10/04 Guy Albertelli
-# 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29, 
-# 10/30,10/31,
-# 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
-# 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
-# 05/01/01 Guy Albertelli
-# 05/01,06/01,09/01 Gerd Kortemeyer
-# 09/01 Guy Albertelli
-# 09/01,10/01,11/01 Gerd Kortemeyer
-# YEAR=2001
-# 3/2 Gerd Kortemeyer
-# 3/19,3/20 Gerd Kortemeyer
-# 5/26,5/28 Gerd Kortemeyer
-# 5/30 H. K. Ng
-# 6/1 Gerd Kortemeyer
-# July Guy Albertelli
-# 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
-# 10/2 Gerd Kortemeyer
-# 11/17,11/20,11/22,11/29 Gerd Kortemeyer
-# 12/5 Matthew Hall
-# 12/5 Guy Albertelli
-# 12/6,12/7,12/12 Gerd Kortemeyer
-# 12/21,12/22,12/27,12/28 Gerd Kortemeyer
-# YEAR=2002
-# 1/4,2/4,2/7 Gerd Kortemeyer
-#
 ###
 
 package Apache::lonnet;
 
 use strict;
-use Apache::File;
 use LWP::UserAgent();
 use HTTP::Headers;
 use vars 
 qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
-   %libserv %pr %prp %metacache %packagetab %titlecache 
+   %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
    %courselogs %accesshash %userrolehash $processmarker $dumpcount 
    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache 
    %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def 
@@ -86,15 +47,16 @@ use HTML::LCParser;
 use Fcntl qw(:flock);
 use Apache::loncoursedata;
 use Apache::lonlocal;
-
+use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
+use Time::HiRes();
 my $readit;
 
 # --------------------------------------------------------------------- Logging
 
 sub logtouch {
     my $execdir=$perlvar{'lonDaemons'};
-    unless (-e "$execdir/logs/lonnet.log") {
-	my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
+    unless (-e "$execdir/logs/lonnet.log") {	
+	open(my $fh,">>$execdir/logs/lonnet.log");
 	close $fh;
     }
     my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
@@ -106,8 +68,10 @@ sub logthis {
     my $execdir=$perlvar{'lonDaemons'};
     my $now=time;
     my $local=localtime($now);
-    my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
-    print $fh "$local ($$): $message\n";
+    if (open(my $fh,">>$execdir/logs/lonnet.log")) {
+	print $fh "$local ($$): $message\n";
+	close($fh);
+    }
     return 1;
 }
 
@@ -116,8 +80,10 @@ sub logperm {
     my $execdir=$perlvar{'lonDaemons'};
     my $now=time;
     my $local=localtime($now);
-    my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
-    print $fh "$now:$message:$local\n";
+    if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
+	print $fh "$now:$message:$local\n";
+	close($fh);
+    }
     return 1;
 }
 
@@ -169,7 +135,7 @@ sub reconlonc {
     my $peerfile=shift;
     &logthis("Trying to reconnect for $peerfile");
     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
-    if (my $fh=Apache::File->new("$loncfile")) {
+    if (open(my $fh,"<$loncfile")) {
 	my $loncpid=<$fh>;
         chomp($loncpid);
         if (kill 0 => $loncpid) {
@@ -217,18 +183,20 @@ sub critical {
       "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
             $dumpcount++;
             {
-             my $dfh;
-             if ($dfh=Apache::File->new(">$dfilename")) {
-                print $dfh "$cmd\n";
-	     }
+		my $dfh;
+		if (open($dfh,">$dfilename")) {
+		    print $dfh "$cmd\n"; 
+		    close($dfh);
+		}
             }
             sleep 2;
             my $wcmd='';
             {
-	     my $dfh;
-             if ($dfh=Apache::File->new("$dfilename")) {
-                $wcmd=<$dfh>;
-	     }
+		my $dfh;
+		if (open($dfh,"<$dfilename")) {
+		    $wcmd=<$dfh>; 
+		    close($dfh);
+		}
             }
             chomp($wcmd);
             if ($wcmd eq $cmd) {
@@ -267,18 +235,27 @@ sub transfer_profile_to_env {
     my ($lonidsdir,$handle)=@_;
     my @profile;
     {
-	my $idf=Apache::File->new("$lonidsdir/$handle.id");
+	open(my $idf,"$lonidsdir/$handle.id");
 	flock($idf,LOCK_SH);
 	@profile=<$idf>;
-	$idf->close();
+	close($idf);
     }
     my $envi;
+    my %Remove;
     for ($envi=0;$envi<=$#profile;$envi++) {
 	chomp($profile[$envi]);
 	my ($envname,$envvalue)=split(/=/,$profile[$envi]);
 	$ENV{$envname} = $envvalue;
+        if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
+            if ($time < time-300) {
+                $Remove{$key}++;
+            }
+        }
     }
     $ENV{'user.environment'} = "$lonidsdir/$handle.id";
+    foreach my $expired_key (keys(%Remove)) {
+        &delenv($expired_key);
+    }
 }
 
 # ---------------------------------------------------------- Append Environment
@@ -297,47 +274,47 @@ sub appenv {
     }
 
     my $lockfh;
-    unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
-       return 'error: '.$!;
+    unless (open($lockfh,"$ENV{'user.environment'}")) {
+	return 'error: '.$!;
     }
     unless (flock($lockfh,LOCK_EX)) {
          &logthis("<font color=blue>WARNING: ".
                   'Could not obtain exclusive lock in appenv: '.$!);
-         $lockfh->close();
+         close($lockfh);
          return 'error: '.$!;
     }
 
     my @oldenv;
     {
-     my $fh;
-     unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
-	return 'error: '.$!;
-     }
-     @oldenv=<$fh>;
-     $fh->close();
+	my $fh;
+	unless (open($fh,"$ENV{'user.environment'}")) {
+	    return 'error: '.$!;
+	}
+	@oldenv=<$fh>;
+	close($fh);
     }
     for (my $i=0; $i<=$#oldenv; $i++) {
         chomp($oldenv[$i]);
         if ($oldenv[$i] ne '') {
-           my ($name,$value)=split(/=/,$oldenv[$i]);
-           unless (defined($newenv{$name})) {
-	      $newenv{$name}=$value;
-	   }
+	    my ($name,$value)=split(/=/,$oldenv[$i]);
+	    unless (defined($newenv{$name})) {
+		$newenv{$name}=$value;
+	    }
         }
     }
     {
-     my $fh;
-     unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
-	return 'error';
-     }
-     my $newname;
-     foreach $newname (keys %newenv) {
-	 print $fh "$newname=$newenv{$newname}\n";
-     }
-     $fh->close();
+	my $fh;
+	unless (open($fh,">$ENV{'user.environment'}")) {
+	    return 'error';
+	}
+	my $newname;
+	foreach $newname (keys %newenv) {
+	    print $fh "$newname=$newenv{$newname}\n";
+	}
+	close($fh);
     }
-
-    $lockfh->close();
+	
+    close($lockfh);
     return 'ok';
 }
 # ----------------------------------------------------- Delete from Environment
@@ -352,34 +329,34 @@ sub delenv {
     }
     my @oldenv;
     {
-     my $fh;
-     unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
-	return 'error';
-     }
-     unless (flock($fh,LOCK_SH)) {
-         &logthis("<font color=blue>WARNING: ".
-                  'Could not obtain shared lock in delenv: '.$!);
-         $fh->close();
-         return 'error: '.$!;
-     }
-     @oldenv=<$fh>;
-     $fh->close();
+	my $fh;
+	unless (open($fh,"$ENV{'user.environment'}")) {
+	    return 'error';
+	}
+	unless (flock($fh,LOCK_SH)) {
+	    &logthis("<font color=blue>WARNING: ".
+		     'Could not obtain shared lock in delenv: '.$!);
+	    close($fh);
+	    return 'error: '.$!;
+	}
+	@oldenv=<$fh>;
+	close($fh);
     }
     {
-     my $fh;
-     unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
-	return 'error';
-     }
-     unless (flock($fh,LOCK_EX)) {
-         &logthis("<font color=blue>WARNING: ".
-                  'Could not obtain exclusive lock in delenv: '.$!);
-         $fh->close();
-         return 'error: '.$!;
-     }
-     foreach (@oldenv) {
-	 unless ($_=~/^$delthis/) { print $fh $_; }
-     }
-     $fh->close();
+	my $fh;
+	unless (open($fh,">$ENV{'user.environment'}")) {
+	    return 'error';
+	}
+	unless (flock($fh,LOCK_EX)) {
+	    &logthis("<font color=blue>WARNING: ".
+		     'Could not obtain exclusive lock in delenv: '.$!);
+	    close($fh);
+	    return 'error: '.$!;
+	}
+	foreach (@oldenv) {
+	    unless ($_=~/^$delthis/) { print $fh $_; }
+	}
+	close($fh);
     }
     return 'ok';
 }
@@ -395,7 +372,7 @@ sub userload {
 	while ($filename=readdir(LONIDS)) {
 	    if ($filename eq '.' || $filename eq '..') {next;}
 	    my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
-	    if ($curtime-$mtime < 3600) { $numusers++; }
+	    if ($curtime-$mtime < 1800) { $numusers++; }
 	}
 	closedir(LONIDS);
     }
@@ -415,10 +392,11 @@ sub overloaderror {
     unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
     my $loadavg;
     if ($checkserver eq $perlvar{'lonHostID'}) {
-       my $loadfile=Apache::File->new('/proc/loadavg');
+       open(my $loadfile,'/proc/loadavg');
        $loadavg=<$loadfile>;
        $loadavg =~ s/\s.*//g;
        $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
+       close($loadfile);
     } else {
        $loadavg=&reply('load',$checkserver);
     }
@@ -585,9 +563,9 @@ sub authenticate {
 sub homeserver {
     my ($uname,$udom,$ignoreBadCache)=@_;
     my $index="$uname:$udom";
-    if ($homecache{$index}) { 
-        return "$homecache{$index}"; 
-    }
+
+    my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
+    if (defined($cached)) { return $result; }
     my $tryserver;
     foreach $tryserver (keys %libserv) {
         next if ($ignoreBadCache ne 'true' && 
@@ -595,8 +573,7 @@ sub homeserver {
 	if ($hostdom{$tryserver} eq $udom) {
            my $answer=reply("home:$udom:$uname",$tryserver);
            if ($answer eq 'found') { 
-              $homecache{$index}=$tryserver;
-              return $tryserver; 
+	       return &do_cache(\%homecache,$index,$tryserver,'home');
            } elsif ($answer eq 'no_host') {
 	       $badServerCache{$tryserver}=1;
            }
@@ -849,19 +826,46 @@ sub getsection {
 }
 
 sub devalidate_cache {
-    my ($cache,$id) = @_;
+    my ($cache,$id,$name) = @_;
     delete $$cache{$id.'.time'};
     delete $$cache{$id};
+    my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
+    open(DB,"$filename.lock");
+    flock(DB,LOCK_EX);
+    my %hash;
+    if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
+	eval <<'EVALBLOCK';
+	    delete($hash{$id});
+	    delete($hash{$id.'.time'});
+EVALBLOCK
+        if ($@) {
+	    &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
+	    unlink($filename);
+	}
+    } else {
+	if (-e $filename) {
+	    &logthis("Unable to tie hash (devalidate cache): $name");
+	    unlink($filename);
+	}
+    }
+    untie(%hash);
+    flock(DB,LOCK_UN);
+    close(DB);
 }
 
 sub is_cached {
-    my ($cache,$id,$time) = @_;
+    my ($cache,$id,$name,$time) = @_;
     if (!$time) { $time=300; }
     if (!exists($$cache{$id.'.time'})) {
+	&load_cache_item($cache,$name,$id);
+    }
+    if (!exists($$cache{$id.'.time'})) {
+#	&logthis("Didn't find $id");
 	return (undef,undef);
     } else {
-	if (time-$$cache{$id.'.time'}>$time) {
-	    &devalidate_cache($cache,$id);
+	if (time-($$cache{$id.'.time'})>$time) {
+#	    &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
+	    &devalidate_cache($cache,$id,$name);
 	    return (undef,undef);
 	}
     }
@@ -869,17 +873,94 @@ sub is_cached {
 }
 
 sub do_cache {
-    my ($cache,$id,$value) = @_;
+    my ($cache,$id,$value,$name) = @_;
     $$cache{$id.'.time'}=time;
-    # do_cache implictly return the set value
     $$cache{$id}=$value;
+#    &logthis("Caching $id as :$value:");
+    &save_cache_item($cache,$name,$id);
+    # do_cache implictly return the set value
+    $$cache{$id};
+}
+
+sub save_cache_item {
+    my ($cache,$name,$id)=@_;
+    my $starttime=&Time::HiRes::time();
+#    &logthis("Saving :$name:$id");
+    my %hash;
+    my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
+    open(DB,"$filename.lock");
+    flock(DB,LOCK_EX);
+    if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
+	eval <<'EVALBLOCK';
+	    $hash{$id.'.time'}=$$cache{$id.'.time'};
+	    $hash{$id}=freeze({'item'=>$$cache{$id}});
+EVALBLOCK
+        if ($@) {
+	    &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
+	    unlink($filename);
+	}
+    } else {
+	if (-e $filename) {
+	    &logthis("Unable to tie hash (save cache item): $name ($!)");
+	    unlink($filename);
+	}
+    }
+    untie(%hash);
+    flock(DB,LOCK_UN);
+    close(DB);
+#    &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
+}
+
+sub load_cache_item {
+    my ($cache,$name,$id)=@_;
+    my $starttime=&Time::HiRes::time();
+#    &logthis("Before Loading $name  for $id size is ".scalar(%$cache));
+    my %hash;
+    my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
+    open(DB,"$filename.lock");
+    flock(DB,LOCK_SH);
+    if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
+	eval <<'EVALBLOCK';
+	    if (!%$cache) {
+		my $count;
+		while (my ($key,$value)=each(%hash)) { 
+		    $count++;
+		    if ($key =~ /\.time$/) {
+			$$cache{$key}=$value;
+		    } else {
+			my $hashref=thaw($value);
+			$$cache{$key}=$hashref->{'item'};
+		    }
+		}
+#	    &logthis("Initial load: $count");
+	    } else {
+		my $hashref=thaw($hash{$id});
+		$$cache{$id}=$hashref->{'item'};
+		$$cache{$id.'.time'}=$hash{$id.'.time'};
+	    }
+EVALBLOCK
+        if ($@) {
+	    &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
+	    unlink($filename);
+	}        
+    } else {
+	if (-e $filename) {
+	    &logthis("Unable to tie hash (load cache item): $name ($!)");
+	    unlink($filename);
+	}
+    }
+    untie(%hash);
+    flock(DB,LOCK_UN);
+    close(DB);
+#    &logthis("After Loading $name size is ".scalar(%$cache));
+#    &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
 }
 
 sub usection {
     my ($udom,$unam,$courseid)=@_;
     my $hashid="$udom:$unam:$courseid";
     
-    my ($result,$cached)=&is_cached(\%usectioncache,$hashid);
+    my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
     if (defined($cached)) { return $result; }
     $courseid=~s/\_/\//g;
     $courseid=~s/^(\w)/\/$1/;
@@ -900,11 +981,11 @@ sub usection {
                 if ($now>$end) { $notactive=1; }
             } 
             unless ($notactive) {
-		return &do_cache(\%usectioncache,$hashid,$section);
+		return &do_cache(\%usectioncache,$hashid,$section,'usection');
 	    }
         }
     }
-    return &do_cache(\%usectioncache,$hashid,'-1');
+    return &do_cache(\%usectioncache,$hashid,'-1','usection');
 }
 
 # ------------------------------------- Read an entry from a user's environment
@@ -944,6 +1025,8 @@ sub getversion {
 
 sub currentversion {
     my $fname=shift;
+    my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
+    if (defined($cached)) { return $result; }
     my $author=$fname;
     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
     my ($udom,$uname)=split(/\//,$author);
@@ -955,7 +1038,7 @@ sub currentversion {
     if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
 	return -1;
     }
-    return $answer;
+    return &do_cache(\%resversioncache,$fname,$answer,'resversion');
 }
 
 # ----------------------------- Subscribe to a resource, return URL if possible
@@ -990,7 +1073,7 @@ sub repcopy {
 	   &logthis("Subscribe returned $remoteurl: $filename");
            return HTTP_SERVICE_UNAVAILABLE;
     } elsif ($remoteurl eq 'not_found') {
-	   &logthis("Subscribe returned not_found: $filename");
+	   #&logthis("Subscribe returned not_found: $filename");
 	   return HTTP_NOT_FOUND;
     } elsif ($remoteurl =~ /^rejected by/) {
 	   &logthis("Subscribe returned $remoteurl: $filename");
@@ -1152,8 +1235,9 @@ sub finishuserfileupload {
     }
 # Save the file
     {
-       my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
+       open(my $fh,'>'.$filepath.'/'.$fname);
        print $fh $ENV{'form.'.$formname};
+       close($fh);
     }
 # Notify homeserver to grep it
 #
@@ -1377,10 +1461,11 @@ sub postannounce {
 }
 
 sub getannounce {
-    if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
+
+    if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
 	my $announcement='';
 	while (<$fh>) { $announcement .=$_; }
-	$fh->close();
+	close($fh);
 	if ($announcement=~/\w/) { 
 	    return 
    '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
@@ -1893,6 +1978,10 @@ sub store {
        } 
     }
     if (!$home) { $home=$ENV{'user.home'}; }
+
+    $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
+    $$storehash{'host'}=$perlvar{'lonHostID'};
+
     my $namevalue='';
     foreach (keys %$storehash) {
         $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
@@ -1926,6 +2015,9 @@ sub cstore {
     }
     if (!$home) { $home=$ENV{'user.home'}; }
 
+    $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
+    $$storehash{'host'}=$perlvar{'lonHostID'};
+
     my $namevalue='';
     foreach (keys %$storehash) {
         $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
@@ -2220,27 +2312,7 @@ sub currentdump {
        return if ($tmp[0] =~ /^(error:|no_such_host)/);
        my %hash = @tmp;
        @tmp=();
-       # Code ripped from lond, essentially.  The only difference
-       # here is the unescaping done by lonnet::dump().  Conceivably
-       # we might run in to problems with parameter names =~ /^v\./
-       while (my ($key,$value) = each(%hash)) {
-           my ($v,$symb,$param) = split(/:/,$key);
-           next if ($v eq 'version' || $symb eq 'keys');
-           next if (exists($returnhash{$symb}) &&
-                    exists($returnhash{$symb}->{$param}) &&
-                    $returnhash{$symb}->{'v.'.$param} > $v);
-           $returnhash{$symb}->{$param}=$value;
-           $returnhash{$symb}->{'v.'.$param}=$v;
-       }
-       #
-       # Remove all of the keys in the hashes which keep track of
-       # the version of the parameter.
-       while (my ($symb,$param_hash) = each(%returnhash)) {
-           # use a foreach because we are going to delete from the hash.
-           foreach my $key (keys(%$param_hash)) {
-               delete($param_hash->{$key}) if ($key =~ /^v\./);
-           }
-       }
+       %returnhash = %{&convert_dump_to_currentdump(\%hash)};
    } else {
        my @pairs=split(/\&/,$rep);
        foreach (@pairs) {
@@ -2253,6 +2325,33 @@ sub currentdump {
    return %returnhash;
 }
 
+sub convert_dump_to_currentdump{
+    my %hash = %{shift()};
+    my %returnhash;
+    # Code ripped from lond, essentially.  The only difference
+    # here is the unescaping done by lonnet::dump().  Conceivably
+    # we might run in to problems with parameter names =~ /^v\./
+    while (my ($key,$value) = each(%hash)) {
+        my ($v,$symb,$param) = split(/:/,$key);
+        next if ($v eq 'version' || $symb eq 'keys');
+        next if (exists($returnhash{$symb}) &&
+                 exists($returnhash{$symb}->{$param}) &&
+                 $returnhash{$symb}->{'v.'.$param} > $v);
+        $returnhash{$symb}->{$param}=$value;
+        $returnhash{$symb}->{'v.'.$param}=$v;
+    }
+    #
+    # Remove all of the keys in the hashes which keep track of
+    # the version of the parameter.
+    while (my ($symb,$param_hash) = each(%returnhash)) {
+        # use a foreach because we are going to delete from the hash.
+        foreach my $key (keys(%$param_hash)) {
+            delete($param_hash->{$key}) if ($key =~ /^v\./);
+        }
+    }
+    return \%returnhash;
+}
+
 # --------------------------------------------------------------- put interface
 
 sub put {
@@ -2344,7 +2443,7 @@ sub customaccess {
 
 sub allowed {
     my ($priv,$uri)=@_;
-
+    $uri=&deversion($uri);
     my $orguri=$uri;
     $uri=&declutter($uri);
 
@@ -2629,6 +2728,7 @@ sub allowed {
 
 sub is_on_map {
     my $uri=&declutter(shift);
+    $uri=~s/\.\d+\.(\w+)$/\.$1/;
     my @uriparts=split(/\//,$uri);
     my $filename=$uriparts[$#uriparts];
     my $pathname=$uri;
@@ -2640,11 +2740,31 @@ sub is_on_map {
     if ($match) {
 	return (1,$1);
     } else {
-	my ($name,$ext)=($filename=~/^(.+)\.(\w+)$/);
-        $ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
-	       /\&(\Q$name\E\.\d+\.$ext)\:([\d\|]+)\&/;
-	return (0,$2,$pathname.'/'.$1);
+	return (0,0);
+    }
+}
+
+# --------------------------------------------------------- Get symb from alias
+
+sub get_symb_from_alias {
+    my $symb=shift;
+    my ($map,$resid,$url)=&decode_symb($symb);
+# Already is a symb
+    if ($url) { return $symb; }
+# Must be an alias
+    my $aliassymb='';
+    my %bighash;
+    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+                            &GDBM_READER(),0640)) {
+        my $rid=$bighash{'mapalias_'.$symb};
+	if ($rid) {
+	    my ($mapid,$resid)=split(/\./,$rid);
+	    $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
+				    $resid,$bighash{'src_'.$rid});
+	}
+        untie %bighash;
     }
+    return $aliassymb;
 }
 
 # ----------------------------------------------------------------- Define Role
@@ -2732,9 +2852,9 @@ sub get_query_reply {
     for (1..100) {
 	sleep 2;
         if (-e $replyfile.'.end') {
-	    if (my $fh=Apache::File->new($replyfile)) {
+	    if (open(my $fh,$replyfile)) {
                $reply.=<$fh>;
-               $fh->close;
+               close($fh);
 	   } else { return 'error: reply_file_error'; }
            return &unescape($reply);
 	}
@@ -3301,7 +3421,7 @@ sub condval {
 sub devalidatecourseresdata {
     my ($coursenum,$coursedomain)=@_;
     my $hashid=$coursenum.':'.$coursedomain;
-    &devalidate_cache(\%courseresdatacache,$hashid);
+    &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
 }
 
 # --------------------------------------------------- Course Resourcedata Query
@@ -3310,18 +3430,18 @@ sub courseresdata {
     my ($coursenum,$coursedomain,@which)=@_;
     my $coursehom=&homeserver($coursenum,$coursedomain);
     my $hashid=$coursenum.':'.$coursedomain;
-    my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid);
+    my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
     unless (defined($cached)) {
 	my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
 	$result=\%dumpreply;
 	my ($tmp) = keys(%dumpreply);
 	if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-	    &do_cache(\%courseresdatacache,$hashid,$result);
+	    &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
 	} elsif ($tmp =~ /^(con_lost|no_such_host)/) {
 	    return $tmp;
 	} elsif ($tmp =~ /^(error)/) {
 	    $result=undef;
-	    &do_cache(\%courseresdatacache,$hashid,$result);
+	    &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
 	}
     }
     foreach my $item (@which) {
@@ -3365,6 +3485,9 @@ sub EXT {
     #get real user name/domain, courseid and symb
     my $courseid;
     my $publicuser;
+    if ($symbparm) {
+	$symbparm=&get_symb_from_alias($symbparm);
+    }
     if (!($uname && $udom)) {
       (my $cursymb,$courseid,$udom,$uname,$publicuser)=
 	  &Apache::lonxml::whichuser($symbparm);
@@ -3450,7 +3573,15 @@ sub EXT {
    } elsif ($realm eq 'request') {
 # ------------------------------------------------------------- request.browser
         if ($space eq 'browser') {
-	    return $ENV{'browser.'.$qualifier};
+	    if ($qualifier eq 'textremote') {
+		if (&mt('textual_remote_display') eq 'on') {
+		    return 1;
+		} else {
+		    return 0;
+		}
+	    } else {
+		return $ENV{'browser.'.$qualifier};
+	    }
 # ------------------------------------------------------------ request.filename
         } else {
             return $ENV{'request.'.$spacequalifierrest};
@@ -3496,16 +3627,17 @@ sub EXT {
 	    #most student don\'t have any data set, check if there is some data
 	    if (! &EXT_cache_status($udom,$uname)) {
 		my $hashid="$udom:$uname";
-		my ($result,$cached)=&is_cached(\%userresdatacache,$hashid);
+		my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
+						'userres');
 		if (!defined($cached)) { 
 		    my %resourcedata=&get('resourcedata',
 					  [$courselevelr,$courselevelm,
 					   $courselevel],$udom,$uname);
 		    $result=\%resourcedata;
+		    &do_cache(\%userresdatacache,$hashid,$result,'userres');
 		}
 		my ($tmp)=keys(%$result);
 		if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
-		    &do_cache(\%userresdatacache,$hashid,$result);
 		    if ($$result{$courselevelr}) {
 			return $$result{$courselevelr}; }
 		    if ($$result{$courselevelm}) {
@@ -3518,11 +3650,9 @@ sub EXT {
 				 " Trying to get resource data for ".
 				 $uname." at ".$udom.": ".
 				 $tmp."</font>");
-			&do_cache(\%userresdatacache,$hashid,undef);
 		    } elsif ($tmp=~/error:No such file/) {
                         &EXT_cache_set($udom,$uname);
 		    } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
-			&do_cache(\%userresdatacache,$hashid,undef);
 			return $tmp;
 		    }
 		}
@@ -3643,15 +3773,20 @@ sub metadata {
 # Look at timestamp of caching
 # Everything is cached by the main uri, libraries are never directly cached
 #
-    unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
+    if (!defined($liburi)) {
+	my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
+	if (defined($cached)) { return $result->{':'.$what}; }
+    }
+    {
 #
 # Is this a recursive call for a library?
 #
+	my %lcmetacache;
         if ($liburi) {
 	    $liburi=&declutter($liburi);
             $filename=$liburi;
         } else {
-	    delete($metacache{$uri.':packages'});
+	    &devalidate_cache(\%metacache,$uri,'meta');
 	}
         my %metathesekeys=();
         unless ($filename=~/\.meta$/) { $filename.='.meta'; }
@@ -3670,32 +3805,39 @@ sub metadata {
 		    if (defined($token->[2]->{'id'})) { 
 			$keyroot.='_'.$token->[2]->{'id'}; 
 		    }
-		    if ($metacache{$uri.':packages'}) {
-			$metacache{$uri.':packages'}.=','.$package.$keyroot;
+		    if ($lcmetacache{':packages'}) {
+			$lcmetacache{':packages'}.=','.$package.$keyroot;
 		    } else {
-			$metacache{$uri.':packages'}=$package.$keyroot;
+			$lcmetacache{':packages'}=$package.$keyroot;
 		    }
 		    foreach (keys %packagetab) {
-			if ($_=~/^$package\&/) {
+			my $part=$keyroot;
+			$part=~s/^\_//;
+			if ($_=~/^\Q$package\E\&/ || 
+			    $_=~/^\Q$package\E_0\&/) {
 			    my ($pack,$name,$subp)=split(/\&/,$_);
 			    # ignore package.tab specified default values
                             # here &package_tab_default() will fetch those
 			    if ($subp eq 'default') { next; }
 			    my $value=$packagetab{$_};
-			    my $part=$keyroot;
-			    $part=~s/^\_//;
+			    my $unikey;
+			    if ($pack =~ /_0$/) {
+				$unikey='parameter_0_'.$name;
+				$part=0;
+			    } else {
+				$unikey='parameter'.$keyroot.'_'.$name;
+			    }
 			    if ($subp eq 'display') {
 				$value.=' [Part: '.$part.']';
 			    }
-			    my $unikey='parameter'.$keyroot.'_'.$name;
-			    $metacache{$uri.':'.$unikey.'.part'}=$part;
+			    $lcmetacache{':'.$unikey.'.part'}=$part;
 			    $metathesekeys{$unikey}=1;
-			    unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
-				$metacache{$uri.':'.$unikey.'.'.$subp}=$value;
+			    unless (defined($lcmetacache{':'.$unikey.'.'.$subp})) {
+				$lcmetacache{':'.$unikey.'.'.$subp}=$value;
 			    }
-			    if (defined($metacache{$uri.':'.$unikey.'.default'})) {
-				$metacache{$uri.':'.$unikey}=
-				    $metacache{$uri.':'.$unikey.'.default'};
+			    if (defined($lcmetacache{':'.$unikey.'.default'})) {
+				$lcmetacache{':'.$unikey}=
+				    $lcmetacache{':'.$unikey.'.default'};
 			    }
 			}
 		    }
@@ -3738,18 +3880,18 @@ sub metadata {
 			}
 			$metathesekeys{$unikey}=1;
 			foreach (@{$token->[3]}) {
-			    $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
+			    $lcmetacache{':'.$unikey.'.'.$_}=$token->[2]->{$_};
 			}
 			my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
-			my $default=$metacache{$uri.':'.$unikey.'.default'};
+			my $default=$lcmetacache{':'.$unikey.'.default'};
 			if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
 		 # only ws inside the tag, and not in default, so use default
 		 # as value
-			    $metacache{$uri.':'.$unikey}=$default;
+			    $lcmetacache{':'.$unikey}=$default;
 			} else {
 		  # either something interesting inside the tag or default
                   # uninteresting
-			    $metacache{$uri.':'.$unikey}=$internaltext;
+			    $lcmetacache{':'.$unikey}=$internaltext;
 			}
 # end of not-a-package not-a-library import
 		    }
@@ -3759,13 +3901,13 @@ sub metadata {
 	    }
 	}
 # are there custom rights to evaluate
-	if ($metacache{$uri.':copyright'} eq 'custom') {
+	if ($lcmetacache{':copyright'} eq 'custom') {
 
     #
     # Importing a rights file here
     #
 	    unless ($depthcount) {
-		my $location=$metacache{$uri.':customdistributionfile'};
+		my $location=$lcmetacache{':customdistributionfile'};
 		my $dir=$filename;
 		$dir=~s|[^/]*$||;
 		$location=&filelocation($dir,$location);
@@ -3776,13 +3918,13 @@ sub metadata {
 		}
 	    }
 	}
-	$metacache{$uri.':keys'}=join(',',keys %metathesekeys);
-	&metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
-	$metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
-	$metacache{$uri.':cachedtimestamp'}=time;
+	$lcmetacache{':keys'}=join(',',keys %metathesekeys);
+	&metadata_generate_part0(\%metathesekeys,\%lcmetacache,$uri);
+	$lcmetacache{':allpossiblekeys'}=join(',',keys %metathesekeys);
+	&do_cache(\%metacache,$uri,\%lcmetacache,'meta');
 # this is the end of "was not already recently cached
     }
-    return $metacache{$uri.':'.$what};
+    return $metacache{$uri}->{':'.$what};
 }
 
 sub metadata_generate_part0 {
@@ -3790,8 +3932,8 @@ sub metadata_generate_part0 {
     my %allnames;
     foreach my $metakey (sort keys %$metadata) {
 	if ($metakey=~/^parameter\_(.*)/) {
-	  my $part=$$metacache{$uri.':'.$metakey.'.part'};
-	  my $name=$$metacache{$uri.':'.$metakey.'.name'};
+	  my $part=$$metacache{':'.$metakey.'.part'};
+	  my $name=$$metacache{':'.$metakey.'.name'};
 	  if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
 	    $allnames{$name}=$part;
 	  }
@@ -3799,13 +3941,13 @@ sub metadata_generate_part0 {
     }
     foreach my $name (keys(%allnames)) {
       $$metadata{"parameter_0_$name"}=1;
-      my $key="$uri:parameter_0_$name";
+      my $key=":parameter_0_$name";
       $$metacache{"$key.part"}='0';
       $$metacache{"$key.name"}=$name;
-      $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
+      $$metacache{"$key.type"}=$$metacache{':parameter_'.
 					   $allnames{$name}.'_'.$name.
 					   '.type'};
-      my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
+      my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
 			     '.display'};
       my $expr='\\[Part: '.$allnames{$name}.'\\]';
       $olddis=~s/$expr/\[Part: 0\]/;
@@ -3822,7 +3964,7 @@ sub gettitle {
 	unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
         return &metadata($urlsymb,'title'); 
     }
-    my ($result,$cached)=&is_cached(\%titlecache,$symb,600);
+    my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
     if (defined($cached)) { return $result; }
     my ($map,$resid,$url)=&decode_symb($symb);
     my $title='';
@@ -3835,7 +3977,7 @@ sub gettitle {
     }
     $title=~s/\&colon\;/\:/gs;
     if ($title) {
-        return &do_cache(\%titlecache,$symb,$title);
+        return &do_cache(\%titlecache,$symb,$title,'title');
     } else {
 	return &metadata($urlsymb,'title');
     }
@@ -3845,13 +3987,13 @@ sub gettitle {
 
 sub symblist {
     my ($mapname,%newhash)=@_;
-    $mapname=declutter($mapname);
+    $mapname=&deversion(&declutter($mapname));
     my %hash;
     if (($ENV{'request.course.fn'}) && (%newhash)) {
         if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
                       &GDBM_WRCREAT(),0640)) {
 	    foreach (keys %newhash) {
-                $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
+                $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
             }
             if (untie(%hash)) {
 		return 'ok';
@@ -3870,12 +4012,15 @@ sub symbverify {
     if ($thisfn=~/\.(page|sequence)$/) { return 1; }
 # check URL part
     my ($map,$resid,$url)=&decode_symb($symb);
-    unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
+
+    unless ($url eq $thisfn) { return 0; }
 
     $symb=&symbclean($symb);
+    $thisfn=&deversion($thisfn);
 
     my %bighash;
     my $okay=0;
+
     if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {
         my $ids=$bighash{'ids_'.&clutter($thisfn)};
@@ -3914,6 +4059,11 @@ sub symbclean {
 
 # ---------------------------------------------- Split symb to find map and url
 
+sub encode_symb {
+    my ($map,$resid,$url)=@_;
+    return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
+}
+
 sub decode_symb {
     my ($map,$resid,$url)=split(/\_\_\_/,shift);
     return (&fixversion($map),$resid,&fixversion($url));
@@ -3922,11 +4072,33 @@ sub decode_symb {
 sub fixversion {
     my $fn=shift;
     if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
-    my ($match,$cond,$versioned)=&is_on_map($fn);
-    unless ($match) {
-	$fn=$versioned;
-    }
-    return $fn;
+    my %bighash;
+    my $uri=&clutter($fn);
+    my $key=$ENV{'request.course.id'}.'_'.$uri;
+# is this cached?
+    my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
+				    'courseresversion',600);
+    if (defined($cached)) { return $result; }
+# unfortunately not cached, or expired
+    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+	    &GDBM_READER(),0640)) {
+ 	if ($bighash{'version_'.$uri}) {
+ 	    my $version=$bighash{'version_'.$uri};
+ 	    unless (($version eq 'mostrecent') || 
+		    ($version==&getversion($uri))) {
+ 		$uri=~s/\.(\w+)$/\.$version\.$1/;
+ 	    }
+ 	}
+ 	untie %bighash;
+    }
+    return &do_cache
+	(\%courseresversioncache,$key,&declutter($uri),'courseresversion');
+}
+
+sub deversion {
+    my $url=shift;
+    $url=~s/\.\d+\.(\w+)$/\.$1/;
+    return $url;
 }
 
 # ------------------------------------------------------ Return symb list entry
@@ -4026,7 +4198,7 @@ sub numval {
 }
 
 sub latest_rnd_algorithm_id {
-    return '64bit';
+    return '64bit2';
 }
 
 sub rndseed {
@@ -4043,6 +4215,8 @@ sub rndseed {
     my $CODE=$ENV{'scantron.CODE'};
     if (defined($CODE)) {
 	&rndseed_CODE_64bit($symb,$courseid,$domain,$username);
+    } elsif ($which eq '64bit2') {
+	return &rndseed_64bit2($symb,$courseid,$domain,$username);
     } elsif ($which eq '64bit') {
 	return &rndseed_64bit($symb,$courseid,$domain,$username);
     }
@@ -4086,14 +4260,36 @@ sub rndseed_64bit {
     }
 }
 
+sub rndseed_64bit2 {
+    my ($symb,$courseid,$domain,$username)=@_;
+    {
+	use integer;
+	# strings need to be an even # of cahracters long, it it is odd the
+        # last characters gets thrown away
+	my $symbchck=unpack("%32S*",$symb.' ') << 21;
+	my $symbseed=numval($symb) << 10;
+	my $namechck=unpack("%32S*",$username.' ');
+	
+	my $nameseed=numval($username) << 21;
+	my $domainseed=unpack("%32S*",$domain.' ') << 10;
+	my $courseseed=unpack("%32S*",$courseid.' ');
+	
+	my $num1=$symbchck+$symbseed+$namechck;
+	my $num2=$nameseed+$domainseed+$courseseed;
+	#&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
+	#&Apache::lonxml::debug("rndseed :$num:$symb");
+	return "$num1,$num2";
+    }
+}
+
 sub rndseed_CODE_64bit {
     my ($symb,$courseid,$domain,$username)=@_;
     {
 	use integer;
-	my $symbchck=unpack("%32S*",$symb) << 16;
+	my $symbchck=unpack("%32S*",$symb.' ') << 16;
 	my $symbseed=numval($symb);
 	my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
-	my $courseseed=unpack("%32S*",$courseid);
+	my $courseseed=unpack("%32S*",$courseid.' ');
 	my $num1=$symbseed+$CODEseed;
 	my $num2=$courseseed+$symbchck;
 	#&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
@@ -4149,7 +4345,8 @@ sub getfile {
  } else { # normal file from res space
   &repcopy($file);
   if (! -e $file ) { return -1; };
-  my $fh=Apache::File->new($file);
+  my $fh;
+  open($fh,"<$file");
   my $a='';
   while (<$fh>) { $a .=$_; }
   return $a;
@@ -4234,10 +4431,28 @@ sub mod_perl_version {
     }
     return 1;
 }
+
+sub correct_line_ends {
+    my ($result)=@_;
+    $$result =~s/\r\n/\n/mg;
+    $$result =~s/\r/\n/mg;
+}
 # ================================================================ Main Program
 
 sub goodbye {
    &logthis("Starting Shut down");
+#not converted to using infrastruture and probably shouldn't be
+   &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
+#converted
+   &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
+   &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
+   &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
+   &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
+#1.1 only
+   &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
+   &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
+   &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
+   &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
    &flushcourselogs();
    &logthis("Shutting down");
    return DONE;
@@ -4247,7 +4462,7 @@ BEGIN {
 # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
     unless ($readit) {
 {
-    my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
+    open(my $config,"</etc/httpd/conf/loncapa.conf");
 
     while (my $configline=<$config>) {
         if ($configline =~ /^[^\#]*PerlSetVar/) {
@@ -4256,9 +4471,10 @@ BEGIN {
            $perlvar{$varname}=$varvalue;
         }
     }
+    close($config);
 }
 {
-    my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
+    open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
 
     while (my $configline=<$config>) {
         if ($configline =~ /^[^\#]*PerlSetVar/) {
@@ -4267,16 +4483,16 @@ BEGIN {
            $perlvar{$varname}=$varvalue;
         }
     }
+    close($config);
 }
 
 # ------------------------------------------------------------ Read domain file
 {
-    my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
-                            '/domain.tab');
     %domaindescription = ();
     %domain_auth_def = ();
     %domain_auth_arg_def = ();
-    if ($fh) {
+    my $fh;
+    if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
        while (<$fh>) {
            next if (/^(\#|\s*$)/);
 #           next if /^\#/;
@@ -4291,16 +4507,17 @@ BEGIN {
 	   $domain_longi{$domain}=$longi;
 	   $domain_lati{$domain}=$lati;
 
-#          &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
+ #         &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
 #          &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
-       }
+	}
     }
+    close ($fh);
 }
 
 
 # ------------------------------------------------------------- Read hosts file
 {
-    my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
+    open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
 
     while (my $configline=<$config>) {
        next if ($configline =~ /^(\#|\s*$)/);
@@ -4318,11 +4535,12 @@ BEGIN {
 	 }
        }
     }
+    close($config);
 }
 
 # ------------------------------------------------------ Read spare server file
 {
-    my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
+    open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
 
     while (my $configline=<$config>) {
        chomp($configline);
@@ -4330,46 +4548,50 @@ BEGIN {
           $spareid{$configline}=1;
        }
     }
+    close($config);
 }
 # ------------------------------------------------------------ Read permissions
 {
-    my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
+    open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
 
     while (my $configline=<$config>) {
-       chomp($configline);
-      if ($configline) {
-       my ($role,$perm)=split(/ /,$configline);
-       if ($perm ne '') { $pr{$role}=$perm; }
-      }
+	chomp($configline);
+	if ($configline) {
+	    my ($role,$perm)=split(/ /,$configline);
+	    if ($perm ne '') { $pr{$role}=$perm; }
+	}
     }
+    close($config);
 }
 
 # -------------------------------------------- Read plain texts for permissions
 {
-    my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
+    open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
 
     while (my $configline=<$config>) {
-       chomp($configline);
-      if ($configline) {
-       my ($short,$plain)=split(/:/,$configline);
-       if ($plain ne '') { $prp{$short}=$plain; }
-      }
+	chomp($configline);
+	if ($configline) {
+	    my ($short,$plain)=split(/:/,$configline);
+	    if ($plain ne '') { $prp{$short}=$plain; }
+	}
     }
+    close($config);
 }
 
 # ---------------------------------------------------------- Read package table
 {
-    my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
+    open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
 
     while (my $configline=<$config>) {
-       chomp($configline);
-       my ($short,$plain)=split(/:/,$configline);
-       my ($pack,$name)=split(/\&/,$short);
-       if ($plain ne '') {
-          $packagetab{$pack.'&'.$name.'&name'}=$name; 
-          $packagetab{$short}=$plain; 
-       }
+	chomp($configline);
+	my ($short,$plain)=split(/:/,$configline);
+	my ($pack,$name)=split(/\&/,$short);
+	if ($plain ne '') {
+	    $packagetab{$pack.'&'.$name.'&name'}=$name; 
+	    $packagetab{$short}=$plain; 
+	}
     }
+    close($config);
 }
 
 # ------------- set up temporary directory