--- loncom/lonnet/perl/lonnet.pm	2004/10/26 15:03:08	1.552
+++ loncom/lonnet/perl/lonnet.pm	2006/03/27 23:43:43	1.723
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.552 2004/10/26 15:03:08 albertel Exp $
+# $Id: lonnet.pm,v 1.723 2006/03/27 23:43:43 banghart Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -35,25 +35,33 @@ use HTTP::Headers;
 use HTTP::Date;
 # use Date::Parse;
 use vars 
-qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
-   %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
-   %courselogs %accesshash %userrolehash $processmarker $dumpcount 
-   %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseresdatacache 
-   %userresdatacache %getsectioncache %domaindescription %domain_auth_def %domain_auth_arg_def 
-   %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
+qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom 
+   %libserv %pr %prp $memcache %packagetab 
+   %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount 
+   %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
+   %domaindescription %domain_auth_def %domain_auth_arg_def 
+   %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
+   $tmpdir $_64bit %env);
 
 use IO::Socket;
 use GDBM_File;
 use Apache::Constants qw(:common :http);
 use HTML::LCParser;
+use HTML::Parser;
 use Fcntl qw(:flock);
-use Apache::loncoursedata;
-use Apache::lonlocal;
-use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
+use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
 use Time::HiRes qw( gettimeofday tv_interval );
+use Cache::Memcached;
+use Digest::MD5;
+
 my $readit;
 my $max_connection_retries = 10;     # Or some such value.
 
+require Exporter;
+
+our @ISA = qw (Exporter);
+our @EXPORT = qw(%env);
+
 =pod
 
 =head1 Package Variables
@@ -116,7 +124,7 @@ sub logperm {
 # -------------------------------------------------- Non-critical communication
 sub subreply {
     my ($cmd,$server)=@_;
-    my $peerfile="$perlvar{'lonSockDir'}/$server";
+    my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
     #
     #  With loncnew process trimming, there's a timing hole between lonc server
     #  process exit and the master server picking up the listen on the AF_UNIX
@@ -144,7 +152,7 @@ sub subreply {
     }
     my $answer;
     if ($client) {
-	print $client "$cmd\n";
+	print $client "sethost:$server:$cmd\n";
 	$answer=<$client>;
 	if (!$answer) { $answer="con_lost"; }
 	chomp($answer);
@@ -158,24 +166,8 @@ sub reply {
     my ($cmd,$server)=@_;
     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') {
-	#   &logthis("Second attempt con_lost on $server");
-        #   my $peerfile="$perlvar{'lonSockDir'}/$server";
-        #   my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",
-        #                                    Type    => SOCK_STREAM,
-        #                                    Timeout => 10)
-        #              or return "con_lost";
-        #   &logthis("Killing socket");
-        #   print $client "close_connection_exit\n";
-           #sleep 5;
-        #   $answer=subreply($cmd,$server);       
-       #}   
-    }
     if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
-       &logthis("<font color=blue>WARNING:".
+       &logthis("<font color=\"blue\">WARNING:".
                 " $cmd to $server returned $answer</font>");
     }
     return $answer;
@@ -199,14 +191,14 @@ sub reconlonc {
             sleep 5;
             if (-e "$peerfile") { return; }
             &logthis(
-  "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
+  "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
         } else {
 	    &logthis(
-               "<font color=blue>WARNING:".
+               "<font color=\"blue\">WARNING:".
                " lonc at pid $loncpid not responding, giving up</font>");
         }
     } else {
-     &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
+     &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
     }
 }
 
@@ -215,17 +207,14 @@ sub reconlonc {
 sub critical {
     my ($cmd,$server)=@_;
     unless ($hostname{$server}) {
-        &logthis("<font color=blue>WARNING:".
+        &logthis("<font color=\"blue\">WARNING:".
                " Critical message to unknown server ($server)</font>");
         return 'no_such_host';
     }
     my $answer=reply($cmd,$server);
     if ($answer eq 'con_lost') {
-        my $pingreply=reply('ping',$server);
 	&reconlonc("$perlvar{'lonSockDir'}/$server");
-        my $pongreply=reply('pong',$server);
-        &logthis("Ping/Pong for $server: $pingreply/$pongreply");
-        $answer=reply($cmd,$server);
+	my $answer=reply($cmd,$server);
         if ($answer eq 'con_lost') {
             my $now=time;
             my $middlename=$cmd;
@@ -252,12 +241,12 @@ sub critical {
             }
             chomp($wcmd);
             if ($wcmd eq $cmd) {
-		&logthis("<font color=blue>WARNING: ".
+		&logthis("<font color=\"blue\">WARNING: ".
                          "Connection buffer $dfilename: $cmd</font>");
                 &logperm("D:$server:$cmd");
 	        return 'con_delayed';
             } else {
-                &logthis("<font color=red>CRITICAL:"
+                &logthis("<font color=\"red\">CRITICAL:"
                         ." Critical connection failed: $server $cmd</font>");
                 &logperm("F:$server:$cmd");
                 return 'con_failed';
@@ -267,24 +256,17 @@ sub critical {
     return $answer;
 }
 
-#
-# -------------- Remove all key from the env that start witha lowercase letter
-#                (Which is always a lon-capa value)
-
-sub cleanenv {
-#    unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
-#    unless (&Apache::exists_config_define("MODPERL2")) { return; }
-    foreach my $key (keys(%ENV)) {
-	if ($key =~ /^[a-z]/) {
-	    delete($ENV{$key});
-	}
-    }
-}
- 
 # ------------------------------------------- Transfer profile into environment
 
 sub transfer_profile_to_env {
     my ($lonidsdir,$handle)=@_;
+    if (!defined($lonidsdir)) {
+	$lonidsdir = $perlvar{'lonIDsDir'};
+    }
+    if (!defined($handle)) {
+        ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
+    }
+
     my @profile;
     {
 	open(my $idf,"$lonidsdir/$handle.id");
@@ -296,15 +278,15 @@ sub transfer_profile_to_env {
     my %Remove;
     for ($envi=0;$envi<=$#profile;$envi++) {
 	chomp($profile[$envi]);
-	my ($envname,$envvalue)=split(/=/,$profile[$envi]);
-	$ENV{$envname} = $envvalue;
+	my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
+	$env{$envname} = $envvalue;
         if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
             if ($time < time-300) {
                 $Remove{$key}++;
             }
         }
     }
-    $ENV{'user.environment'} = "$lonidsdir/$handle.id";
+    $env{'user.environment'} = "$lonidsdir/$handle.id";
     foreach my $expired_key (keys(%Remove)) {
         &delenv($expired_key);
     }
@@ -314,23 +296,23 @@ sub transfer_profile_to_env {
 
 sub appenv {
     my %newenv=@_;
-    foreach (keys %newenv) {
-	if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
-            &logthis("<font color=blue>WARNING: ".
-                "Attempt to modify environment ".$_." to ".$newenv{$_}
+    foreach my $key (keys(%newenv)) {
+	if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
+            &logthis("<font color=\"blue\">WARNING: ".
+                "Attempt to modify environment ".$key." to ".$newenv{$key}
                 .'</font>');
-	    delete($newenv{$_});
+	    delete($newenv{$key});
         } else {
-            $ENV{$_}=$newenv{$_};
+            $env{$key}=$newenv{$key};
         }
     }
 
     my $lockfh;
-    unless (open($lockfh,"$ENV{'user.environment'}")) {
+    unless (open($lockfh,"$env{'user.environment'}")) {
 	return 'error: '.$!;
     }
     unless (flock($lockfh,LOCK_EX)) {
-         &logthis("<font color=blue>WARNING: ".
+         &logthis("<font color=\"blue\">WARNING: ".
                   'Could not obtain exclusive lock in appenv: '.$!);
          close($lockfh);
          return 'error: '.$!;
@@ -339,7 +321,7 @@ sub appenv {
     my @oldenv;
     {
 	my $fh;
-	unless (open($fh,"$ENV{'user.environment'}")) {
+	unless (open($fh,"$env{'user.environment'}")) {
 	    return 'error: '.$!;
 	}
 	@oldenv=<$fh>;
@@ -348,7 +330,7 @@ sub appenv {
     for (my $i=0; $i<=$#oldenv; $i++) {
         chomp($oldenv[$i]);
         if ($oldenv[$i] ne '') {
-	    my ($name,$value)=split(/=/,$oldenv[$i]);
+	    my ($name,$value)=split(/=/,$oldenv[$i],2);
 	    unless (defined($newenv{$name})) {
 		$newenv{$name}=$value;
 	    }
@@ -356,7 +338,7 @@ sub appenv {
     }
     {
 	my $fh;
-	unless (open($fh,">$ENV{'user.environment'}")) {
+	unless (open($fh,">$env{'user.environment'}")) {
 	    return 'error';
 	}
 	my $newname;
@@ -375,18 +357,18 @@ sub delenv {
     my $delthis=shift;
     my %newenv=();
     if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
-        &logthis("<font color=blue>WARNING: ".
+        &logthis("<font color=\"blue\">WARNING: ".
                 "Attempt to delete from environment ".$delthis);
         return 'error';
     }
     my @oldenv;
     {
 	my $fh;
-	unless (open($fh,"$ENV{'user.environment'}")) {
+	unless (open($fh,"$env{'user.environment'}")) {
 	    return 'error';
 	}
 	unless (flock($fh,LOCK_SH)) {
-	    &logthis("<font color=blue>WARNING: ".
+	    &logthis("<font color=\"blue\">WARNING: ".
 		     'Could not obtain shared lock in delenv: '.$!);
 	    close($fh);
 	    return 'error: '.$!;
@@ -396,21 +378,21 @@ sub delenv {
     }
     {
 	my $fh;
-	unless (open($fh,">$ENV{'user.environment'}")) {
+	unless (open($fh,">$env{'user.environment'}")) {
 	    return 'error';
 	}
 	unless (flock($fh,LOCK_EX)) {
-	    &logthis("<font color=blue>WARNING: ".
+	    &logthis("<font color=\"blue\">WARNING: ".
 		     'Could not obtain exclusive lock in delenv: '.$!);
 	    close($fh);
 	    return 'error: '.$!;
 	}
-	foreach (@oldenv) {
-	    if ($_=~/^$delthis/) { 
-                my ($key,undef) = split('=',$_);
-                delete($ENV{$key});
+	foreach my $cur_key (@oldenv) {
+	    if ($cur_key=~/^$delthis/) { 
+                my ($key,undef) = split('=',$cur_key,2);
+                delete($env{$key});
             } else {
-                print $fh $_; 
+                print $fh $cur_key; 
             }
 	}
 	close($fh);
@@ -461,7 +443,7 @@ sub overloaderror {
     if ($overload>0) {
 	$r->err_headers_out->{'Retry-After'}=$overload;
         $r->log_error('Overload of '.$overload.' on '.$checkserver);
-        return 409;
+        return 413;
     }    
     return '';
 }
@@ -469,15 +451,15 @@ sub overloaderror {
 # ------------------------------ Find server with least workload from spare.tab
 
 sub spareserver {
-    my ($loadpercent,$userloadpercent) = @_;
+    my ($loadpercent,$userloadpercent,$want_server_name) = @_;
     my $tryserver;
     my $spareserver='';
     if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
     my $lowestserver=$loadpercent > $userloadpercent?
 	             $loadpercent :  $userloadpercent;
-    foreach $tryserver (keys %spareid) {
-	my $loadans=reply('load',$tryserver);
-	my $userloadans=reply('userload',$tryserver);
+    foreach $tryserver (keys(%spareid)) {
+	my $loadans=&reply('load',$tryserver);
+	my $userloadans=&reply('userload',$tryserver);
 	if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
 	    next; #didn't get a number from the server
 	}
@@ -494,7 +476,11 @@ sub spareserver {
 	    $answer = $userloadans;
 	}
 	if (($answer =~ /\d/) && ($answer<$lowestserver)) {
-	    $spareserver="http://$hostname{$tryserver}";
+	    if ($want_server_name) {
+		$spareserver=$tryserver;
+	    } else {
+		$spareserver="http://$hostname{$tryserver}";
+	    }
 	    $lowestserver=$answer;
 	}
     }
@@ -578,12 +564,12 @@ sub authenticate {
 
 # ---------------------- Find the homebase for a user from domain's lib servers
 
+my %homecache;
 sub homeserver {
     my ($uname,$udom,$ignoreBadCache)=@_;
     my $index="$uname:$udom";
 
-    my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
-    if (defined($cached)) { return $result; }
+    if (exists($homecache{$index})) { return $homecache{$index}; }
     my $tryserver;
     foreach $tryserver (keys %libserv) {
         next if ($ignoreBadCache ne 'true' && 
@@ -591,7 +577,7 @@ sub homeserver {
 	if ($hostdom{$tryserver} eq $udom) {
            my $answer=reply("home:$udom:$uname",$tryserver);
            if ($answer eq 'found') { 
-	       return &do_cache(\%homecache,$index,$tryserver,'home');
+	       return $homecache{$index}=$tryserver;
            } elsif ($answer eq 'no_host') {
 	       $badServerCache{$tryserver}=1;
            }
@@ -671,15 +657,15 @@ sub assign_access_key {
 #
     my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
     $kdom=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
+   $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
     $knum=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
+   $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
     $cdom=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+   $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
     $cnum=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
-    $udom=$ENV{'user.name'} unless (defined($udom));
-    $uname=$ENV{'user.domain'} unless (defined($uname));
+   $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
+    $udom=$env{'user.name'} unless (defined($udom));
+    $uname=$env{'user.domain'} unless (defined($uname));
     my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
     if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
         ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) { 
@@ -721,9 +707,9 @@ sub comment_access_key {
 #
     my ($ckey,$cdom,$cnum,$logentry)=@_;
     $cdom=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+   $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
     $cnum=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
+   $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
     my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
     if ($existing{$ckey}) {
         $existing{$ckey}.='; '.$logentry;
@@ -745,9 +731,9 @@ sub comment_access_key {
 sub generate_access_keys {
     my ($number,$cdom,$cnum,$logentry)=@_;
     $cdom=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+   $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
     $cnum=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
+   $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
     unless (&allowed('mky',$cdom)) { return 0; }
     unless (($cdom) && ($cnum)) { return 0; }
     if ($number>10000) { return 0; }
@@ -766,14 +752,14 @@ sub generate_access_keys {
        } else {
 	  if (&put('accesskeys',
               { $newkey => '# generated '.localtime().
-                           ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
+                           ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
                            '; '.$logentry },
 		   $cdom,$cnum) eq 'ok') {
               $total++;
 	  }
        }
     }
-    &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
+    &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
          'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
     return $total;
 }
@@ -783,24 +769,32 @@ sub generate_access_keys {
 sub validate_access_key {
     my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
     $cdom=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+   $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
     $cnum=
-   $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
-    $udom=$ENV{'user.domain'} unless (defined($udom));
-    $uname=$ENV{'user.name'} unless (defined($uname));
+   $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
+    $udom=$env{'user.domain'} unless (defined($udom));
+    $uname=$env{'user.name'} unless (defined($uname));
     my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
     return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
 }
 
 # ------------------------------------- Find the section of student in a course
+sub devalidate_getsection_cache {
+    my ($udom,$unam,$courseid)=@_;
+    $courseid=~s/\_/\//g;
+    $courseid=~s/^(\w)/\/$1/;
+    my $hashid="$udom:$unam:$courseid";
+    &devalidate_cache_new('getsection',$hashid);
+}
 
 sub getsection {
     my ($udom,$unam,$courseid)=@_;
+    my $cachetime=1800;
     $courseid=~s/\_/\//g;
     $courseid=~s/^(\w)/\/$1/;
 
     my $hashid="$udom:$unam:$courseid";
-    my ($result,$cached)=&is_cached(\%getsectioncache,$hashid,'getsection');
+    my ($result,$cached)=&is_cached_new('getsection',$hashid);
     if (defined($cached)) { return $result; }
 
     my %Pending; 
@@ -835,211 +829,113 @@ sub getsection {
             $Pending{$start}=$section;
             next;
         }
-        return &do_cache(\%getsectioncache,$hashid,$section,'getsection');
+        return &do_cache_new('getsection',$hashid,$section,$cachetime);
     }
     #
     # Presumedly there will be few matching roles from the above
     # loop and the sorting time will be negligible.
     if (scalar(keys(%Pending))) {
         my ($time) = sort {$a <=> $b} keys(%Pending);
-        return &do_cache(\%getsectioncache,$hashid,$Pending{$time},'getsection');
+        return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
     } 
     if (scalar(keys(%Expired))) {
         my @sorted = sort {$a <=> $b} keys(%Expired);
         my $time = pop(@sorted);
-        return &do_cache(\%getsectioncache,$hashid,$Expired{$time},'getsection');
+        return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
     }
-    return &do_cache(\%getsectioncache,$hashid,'-1','getsection');
+    return &do_cache_new('getsection',$hashid,'-1',$cachetime);
 }
 
+sub save_cache {
+    my ($r)=@_;
+    if (! $r->is_initial_req()) { return DECLINED; }
+    &purge_remembered();
+    #&Apache::loncommon::validate_page();
+    undef(%env);
+    return OK;
+}
 
-my $disk_caching_disabled=1;
-
-sub devalidate_cache {
-    my ($cache,$id,$name) = @_;
-    delete $$cache{$id.'.time'};
-    delete $$cache{$id.'.file'};
-    delete $$cache{$id};
-    if (1 || $disk_caching_disabled) { return; }
-    my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
-    if (!-e $filename) { return; }
-    open(DB,">$filename.lock");
-    flock(DB,LOCK_EX);
-    my %hash;
-    if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
-	eval <<'EVALBLOCK';
-	    delete($hash{$id});
-	    delete($hash{$id.'.time'});
-EVALBLOCK
-        if ($@) {
-	    &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
-	    unlink($filename);
-	}
-    } else {
-	if (-e $filename) {
-	    &logthis("Unable to tie hash (devalidate cache): $name");
-	    unlink($filename);
-	}
-    }
-    untie(%hash);
-    flock(DB,LOCK_UN);
-    close(DB);
-}
-
-sub is_cached {
-    my ($cache,$id,$name,$time) = @_;
-    if (!$time) { $time=300; }
-    if (!exists($$cache{$id.'.time'})) {
-	&load_cache_item($cache,$name,$id,$time);
-    }
-    if (!exists($$cache{$id.'.time'})) {
-#	&logthis("Didn't find $id");
+my $to_remember=-1;
+my %remembered;
+my %accessed;
+my $kicks=0;
+my $hits=0;
+sub devalidate_cache_new {
+    my ($name,$id,$debug) = @_;
+    if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
+    $id=&escape($name.':'.$id);
+    $memcache->delete($id);
+    delete($remembered{$id});
+    delete($accessed{$id});
+}
+
+sub is_cached_new {
+    my ($name,$id,$debug) = @_;
+    $id=&escape($name.':'.$id);
+    if (exists($remembered{$id})) {
+	if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
+	$accessed{$id}=[&gettimeofday()];
+	$hits++;
+	return ($remembered{$id},1);
+    }
+    my $value = $memcache->get($id);
+    if (!(defined($value))) {
+	if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
 	return (undef,undef);
-    } else {
-	if (time-($$cache{$id.'.time'})>$time) {
-	    if (exists($$cache{$id.'.file'})) {
-		foreach my $filename (@{ $$cache{$id.'.file'} }) {
-		    my $mtime=(stat($filename))[9];
-		    #+1 is to take care of edge effects
-		    if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
-#			&logthis("Upping $mtime - ".$$cache{$id.'.time'}.
-#				 "$id because of $filename");
-		    } else {
-			&logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
-			&devalidate_cache($cache,$id,$name);
-			return (undef,undef);
-		    }
-		}
-		$$cache{$id.'.time'}=time;
-	    } else {
-#		&logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
-		&devalidate_cache($cache,$id,$name);
-		return (undef,undef);
-	    }
-	}
     }
-    return ($$cache{$id},1);
-}
-
-sub do_cache {
-    my ($cache,$id,$value,$name) = @_;
-    $$cache{$id.'.time'}=time;
-    $$cache{$id}=$value;
-#    &logthis("Caching $id as :$value:");
-    &save_cache_item($cache,$name,$id);
-    # do_cache implictly return the set value
-    $$cache{$id};
-}
-
-my %do_save_item;
-my %do_save;
-sub save_cache_item {
-    my ($cache,$name,$id)=@_;
-    if ($disk_caching_disabled) { return; }
-    $do_save{$name}=$cache;
-    if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
-    $do_save_item{$name}->{$id}=1;
+    if ($value eq '__undef__') {
+	if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
+	$value=undef;
+    }
+    &make_room($id,$value,$debug);
+    if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
+    return ($value,1);
+}
+
+sub do_cache_new {
+    my ($name,$id,$value,$time,$debug) = @_;
+    $id=&escape($name.':'.$id);
+    my $setvalue=$value;
+    if (!defined($setvalue)) {
+	$setvalue='__undef__';
+    }
+    if (!defined($time) ) {
+	$time=600;
+    }
+    if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
+    $memcache->set($id,$setvalue,$time);
+    # need to make a copy of $value
+    #&make_room($id,$value,$debug);
+    return $value;
+}
+
+sub make_room {
+    my ($id,$value,$debug)=@_;
+    $remembered{$id}=$value;
+    if ($to_remember<0) { return; }
+    $accessed{$id}=[&gettimeofday()];
+    if (scalar(keys(%remembered)) <= $to_remember) { return; }
+    my $to_kick;
+    my $max_time=0;
+    foreach my $other (keys(%accessed)) {
+	if (&tv_interval($accessed{$other}) > $max_time) {
+	    $to_kick=$other;
+	    $max_time=&tv_interval($accessed{$other});
+	}
+    }
+    delete($remembered{$to_kick});
+    delete($accessed{$to_kick});
+    $kicks++;
+    if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
     return;
 }
 
-sub save_cache {
-    if ($disk_caching_disabled) { return; }
-    my ($cache,$name,$id);
-    foreach $name (keys(%do_save)) {
-	$cache=$do_save{$name};
-
-	my $starttime=&Time::HiRes::time();
-	&logthis("Saving :$name:");
-	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)) {
-	    foreach $id (keys(%{ $do_save_item{$name} })) {
-		eval <<'EVALBLOCK';
-		$hash{$id.'.time'}=$$cache{$id.'.time'};
-		$hash{$id}=freeze({'item'=>$$cache{$id}});
-		if (exists($$cache{$id.'.file'})) {
-		    $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
-		}
-EVALBLOCK
-                if ($@) {
-		    &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
-		    unlink($filename);
-		    last;
-		}
-	    }
-	} else {
-	    if (-e $filename) {
-		&logthis("Unable to tie hash (save cache): $name ($!)");
-		unlink($filename);
-	    }
-	}
-	untie(%hash);
-	flock(DB,LOCK_UN);
-	close(DB);
-	&logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
-    }
-    undef(%do_save);
-    undef(%do_save_item);
-
-}
-
-sub load_cache_item {
-    my ($cache,$name,$id,$time)=@_;
-    if ($disk_caching_disabled) { return; }
-    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";
-    if (!-e $filename) { return; }
-    open(DB,">$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 {
-		if (($$cache{$id.'.time'}+$time) < time) {
-		    $$cache{$id.'.time'}=$hash{$id.'.time'};
-		    {
-			my $hashref=thaw($hash{$id});
-			$$cache{$id}=$hashref->{'item'};
-		    }
-		    if (exists($hash{$id.'.file'})) {
-			my $hashref=thaw($hash{$id.'.file'});
-			$$cache{$id.'.file'}=$hashref->{'item'};
-		    }
-		}
-	    }
-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 purge_remembered {
+    #&logthis("Tossing ".scalar(keys(%remembered)));
+    #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
+    undef(%remembered);
+    undef(%accessed);
 }
-
 # ------------------------------------- Read an entry from a user's environment
 
 sub userenvironment {
@@ -1055,15 +951,65 @@ sub userenvironment {
     return %returnhash;
 }
 
+# ---------------------------------------------------------- Get a studentphoto
+sub studentphoto {
+    my ($udom,$unam,$ext) = @_;
+    my $home=&Apache::lonnet::homeserver($unam,$udom);
+    if (defined($env{'request.course.id'})) {
+        if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
+            if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
+                return(&retrievestudentphoto($udom,$unam,$ext)); 
+            } else {
+                my ($result,$perm_reqd)=
+		    &Apache::lonnet::auto_photo_permission($unam,$udom);
+                if ($result eq 'ok') {
+                    if (!($perm_reqd eq 'yes')) {
+                        return(&retrievestudentphoto($udom,$unam,$ext));
+                    }
+                }
+            }
+        }
+    } else {
+        my ($result,$perm_reqd) = 
+	    &Apache::lonnet::auto_photo_permission($unam,$udom);
+        if ($result eq 'ok') {
+            if (!($perm_reqd eq 'yes')) {
+                return(&retrievestudentphoto($udom,$unam,$ext));
+            }
+        }
+    }
+    return '/adm/lonKaputt/lonlogo_broken.gif';
+}
+
+sub retrievestudentphoto {
+    my ($udom,$unam,$ext,$type) = @_;
+    my $home=&Apache::lonnet::homeserver($unam,$udom);
+    my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
+    if ($ret eq 'ok') {
+        my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
+        if ($type eq 'thumbnail') {
+            $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext"; 
+        }
+        my $tokenurl=&Apache::lonnet::tokenwrapper($url);
+        return $tokenurl;
+    } else {
+        if ($type eq 'thumbnail') {
+            return '/adm/lonKaputt/genericstudent_tn.gif';
+        } else { 
+            return '/adm/lonKaputt/lonlogo_broken.gif';
+        }
+    }
+}
+
 # -------------------------------------------------------------------- New chat
 
 sub chatsend {
     my ($newentry,$anon)=@_;
-    my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
-    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
-    my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
+    my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
+    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
+    my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
     &reply('chatsend:'.$cdom.':'.$cnum.':'.
-	   &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
+	   &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
 		   &escape($newentry)),$chome);
 }
 
@@ -1077,7 +1023,7 @@ sub getversion {
 
 sub currentversion {
     my $fname=shift;
-    my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
+    my ($result,$cached)=&is_cached_new('resversion',$fname);
     if (defined($cached)) { return $result; }
     my $author=$fname;
     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
@@ -1090,7 +1036,7 @@ sub currentversion {
     if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
 	return -1;
     }
-    return &do_cache(\%resversioncache,$fname,$answer,'resversion');
+    return &do_cache_new('resversion',$fname,$answer,600);
 }
 
 # ----------------------------- Subscribe to a resource, return URL if possible
@@ -1118,27 +1064,27 @@ sub subscribe {
 sub repcopy {
     my $filename=shift;
     $filename=~s/\/+/\//g;
-    if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
-    if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
+    if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
+    if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
     if ($filename=~m|^/home/httpd/html/userfiles/| or
-	$filename=~m|^/*uploaded/|) { 
+	$filename=~m -^/*(uploaded|editupload)/-) { 
 	return &repcopy_userfile($filename);
     }
     $filename=~s/[\n\r]//g;
     my $transname="$filename.in.transfer";
-    if ((-e $filename) || (-e $transname)) { return OK; }
+    if ((-e $filename) || (-e $transname)) { return 'ok'; }
     my $remoteurl=subscribe($filename);
     if ($remoteurl =~ /^con_lost by/) {
 	   &logthis("Subscribe returned $remoteurl: $filename");
-           return HTTP_SERVICE_UNAVAILABLE;
+           return 'unavailable';
     } elsif ($remoteurl eq 'not_found') {
 	   #&logthis("Subscribe returned not_found: $filename");
-	   return HTTP_NOT_FOUND;
+	   return 'not_found';
     } elsif ($remoteurl =~ /^rejected by/) {
 	   &logthis("Subscribe returned $remoteurl: $filename");
-           return FORBIDDEN;
+           return 'forbidden';
     } elsif ($remoteurl eq 'directory') {
-           return OK;
+           return 'ok';
     } else {
         my $author=$filename;
         $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
@@ -1149,7 +1095,7 @@ sub repcopy {
            my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
            if ($path ne "$perlvar{'lonDocRoot'}/res") {
                &logthis("Malconfiguration for replication: $filename");
-	       return HTTP_BAD_REQUEST;
+	       return 'bad_request';
            }
            my $count;
            for ($count=5;$count<$#parts;$count++) {
@@ -1164,9 +1110,9 @@ sub repcopy {
            if ($response->is_error()) {
 	       unlink($transname);
                my $message=$response->status_line;
-               &logthis("<font color=blue>WARNING:"
+               &logthis("<font color=\"blue\">WARNING:"
                        ." LWP get: $message: $filename</font>");
-               return HTTP_SERVICE_UNAVAILABLE;
+               return 'unavailable';
            } else {
 	       if ($remoteurl!~/\.meta$/) {
                   my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
@@ -1174,11 +1120,11 @@ sub repcopy {
                   if ($mresponse->is_error()) {
 		      unlink($filename.'.meta');
                       &logthis(
-                     "<font color=yellow>INFO: No metadata: $filename</font>");
+                     "<font color=\"yellow\">INFO: No metadata: $filename</font>");
                   }
 	       }
                rename($transname,$filename);
-               return OK;
+               return 'ok';
            }
        }
     }
@@ -1187,10 +1133,12 @@ sub repcopy {
 # ------------------------------------------------ Get server side include body
 sub ssi_body {
     my ($filelink,%form)=@_;
+    if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
+        $form{'LONCAPA_INTERNAL_no_discussion'}='true';
+    }
     my $output=($filelink=~/^http\:/?&externalssi($filelink):
                                      &ssi($filelink,%form));
-    $output=~
-            s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
+    $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
     $output=~s/^.*?\<body[^\>]*\>//si;
     $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
     return $output;
@@ -1205,7 +1153,9 @@ sub ssi {
     my $ua=new LWP::UserAgent;
     
     my $request;
-    
+
+    $form{'no_update_last_known'}=1;
+
     if (%form) {
       $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
       $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
@@ -1241,8 +1191,11 @@ sub allowuploaded {
 }
 
 # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
-# input: action, courseID, current domain, home server for course, intended
-#        path to file, source of file.
+# input: action, courseID, current domain, intended
+#        path to file, source of file, instruction to parse file for objects,
+#        ref to hash for embedded objects,
+#        ref to hash for codebase of java objects.
+#
 # output: url to file (if action was uploaddoc), 
 #         ok if successful, or diagnostic message otherwise (if action was propagate or copy)
 #
@@ -1261,34 +1214,25 @@ sub allowuploaded {
 #         course's home server.
 #
 # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
-#         will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
+#         will be retrived from $env{form.uploaddoc} (from DOCS interface) to
 #         /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
 #         and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
 #         in course's home server.
-
+#
 
 sub process_coursefile {
-    my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
+    my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
     my $fetchresult;
+    my $home=&homeserver($docuname,$docudom);
     if ($action eq 'propagate') {
-        $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
-                            ,$docuhome);
+        $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
+			     $home);
     } else {
-        my $fetchresult = '';
         my $fpath = '';
         my $fname = $file;
         ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
         $fpath=$docudom.'/'.$docuname.'/'.$fpath;
-        my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
-        unless ($fpath eq '') {
-            my @parts=split('/',$fpath);
-            foreach my $part (@parts) {
-                $filepath.= '/'.$part;
-                if ((-e $filepath)!=1) {
-                    mkdir($filepath,0777);
-                }
-            }
-        }
+        my $filepath = &build_filepath($fpath);
         if ($action eq 'copy') {
             if ($source eq '') {
                 $fetchresult = 'no source file';
@@ -1297,33 +1241,74 @@ sub process_coursefile {
                 my $destination = $filepath.'/'.$fname;
                 rename($source,$destination);
                 $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
-                                 $docuhome);
+                                 $home);
             }
         } elsif ($action eq 'uploaddoc') {
             open(my $fh,'>'.$filepath.'/'.$fname);
-            print $fh $ENV{'form.'.$source};
+            print $fh $env{'form.'.$source};
             close($fh);
+            if ($parser eq 'parse') {
+                my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
+                unless ($parse_result eq 'ok') {
+                    &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
+                }
+            }
             $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
-                                 $docuhome);
+                                 $home);
             if ($fetchresult eq 'ok') {
                 return '/uploaded/'.$fpath.'/'.$fname;
             } else {
                 &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
-                        ' to host '.$docuhome.': '.$fetchresult);
+                        ' to host '.$home.': '.$fetchresult);
                 return '/adm/notfound.html';
             }
         }
     }
     unless ( $fetchresult eq 'ok') {
         &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
-             ' to host '.$docuhome.': '.$fetchresult);
+             ' to host '.$home.': '.$fetchresult);
     }
     return $fetchresult;
 }
 
-# --------------- Take an uploaded file and put it into the userfiles directory
-# input: name of form element, coursedoc=1 means this is for the course
-# output: url of file in userspace
+sub build_filepath {
+    my ($fpath) = @_;
+    my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
+    unless ($fpath eq '') {
+        my @parts=split('/',$fpath);
+        foreach my $part (@parts) {
+            $filepath.= '/'.$part;
+            if ((-e $filepath)!=1) {
+                mkdir($filepath,0777);
+            }
+        }
+    }
+    return $filepath;
+}
+
+sub store_edited_file {
+    my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
+    my $file = $primary_url;
+    $file =~ s#^/uploaded/$docudom/$docuname/##;
+    my $fpath = '';
+    my $fname = $file;
+    ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
+    $fpath=$docudom.'/'.$docuname.'/'.$fpath;
+    my $filepath = &build_filepath($fpath);
+    open(my $fh,'>'.$filepath.'/'.$fname);
+    print $fh $content;
+    close($fh);
+    my $home=&homeserver($docuname,$docudom);
+    $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
+			  $home);
+    if ($$fetchresult eq 'ok') {
+        return '/uploaded/'.$fpath.'/'.$fname;
+    } else {
+        &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
+		 ' to host '.$home.': '.$$fetchresult);
+        return '/adm/notfound.html';
+    }
+}
 
 sub clean_filename {
     my ($fname)=@_;
@@ -1341,14 +1326,26 @@ sub clean_filename {
     return $fname;
 }
 
+# --------------- Take an uploaded file and put it into the userfiles directory
+# input: $formname - the contents of the file are in $env{"form.$formname"}
+#                    the desired filenam is in $env{"form.$formname.filename"}
+#        $coursedoc - if true up to the current course
+#                     if false
+#        $subdir - directory in userfile to store the file into
+#        $parser, $allfiles, $codebase - unknown
+#
+# output: url of file in userspace, or error: <message> 
+#             or /adm/notfound.html if failure to upload occurse
+
+
 sub userfileupload {
-    my ($formname,$coursedoc,$subdir)=@_;
+    my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
     if (!defined($subdir)) { $subdir='unknown'; }
-    my $fname=$ENV{'form.'.$formname.'.filename'};
+    my $fname=$env{'form.'.$formname.'.filename'};
     $fname=&clean_filename($fname);
 # See if there is anything left
     unless ($fname) { return 'error: no uploaded file'; }
-    chop($ENV{'form.'.$formname});
+    chop($env{'form.'.$formname});
     if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
         my $now = time;
         my $filepath = 'tmp/helprequests/'.$now;
@@ -1361,35 +1358,46 @@ sub userfileupload {
             }
         }
         open(my $fh,'>'.$fullpath.'/'.$fname);
-        print $fh $ENV{'form.'.$formname};
+        print $fh $env{'form.'.$formname};
         close($fh);
         return $fullpath.'/'.$fname; 
     }
+    
 # Create the directory if not present
-    my $docuname='';
-    my $docudom='';
-    my $docuhome='';
     $fname="$subdir/$fname";
     if ($coursedoc) {
-	$docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
-	$docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
-	$docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
-        if ($ENV{'form.folder'} =~ m/^default/) {
-            return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
+	my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
+	my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
+        if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
+            return &finishuserfileupload($docuname,$docudom,
+					 $formname,$fname,$parser,$allfiles,
+					 $codebase);
         } else {
-            $fname=$ENV{'form.folder'}.'/'.$fname;
-            return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
+            $fname=$env{'form.folder'}.'/'.$fname;
+            return &process_coursefile('uploaddoc',$docuname,$docudom,
+				       $fname,$formname,$parser,
+				       $allfiles,$codebase);
+        }
+    } elsif (defined($destuname)) {
+        my $docuname=$destuname;
+        my $docudom=$destudom;
+	return &finishuserfileupload($docuname,$docudom,$formname,
+				     $fname,$parser,$allfiles,$codebase);
+        
+    } else {
+        my $docuname=$env{'user.name'};
+        my $docudom=$env{'user.domain'};
+        if (exists($env{'form.group'})) {
+            $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
+            $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
         }
-    } else {
-        $docuname=$ENV{'user.name'};
-        $docudom=$ENV{'user.domain'};
-        $docuhome=$ENV{'user.home'};
-        return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
+	return &finishuserfileupload($docuname,$docudom,$formname,
+				     $fname,$parser,$allfiles,$codebase);
     }
 }
 
 sub finishuserfileupload {
-    my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
+    my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
     my $path=$docudom.'/'.$docuname.'/';
     my $filepath=$perlvar{'lonDocRoot'};
     my ($fnamepath,$file);
@@ -1408,13 +1416,29 @@ sub finishuserfileupload {
     }
 # Save the file
     {
-	#&Apache::lonnet::logthis("Saving to $filepath $file");
-       open(my $fh,'>'.$filepath.'/'.$file);
-       print $fh $ENV{'form.'.$formname};
-       close($fh);
+	if (!open(FH,'>'.$filepath.'/'.$file)) {
+	    &logthis('Failed to create '.$filepath.'/'.$file);
+	    print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
+	    return '/adm/notfound.html';
+	}
+	if (!print FH ($env{'form.'.$formname})) {
+	    &logthis('Failed to write to '.$filepath.'/'.$file);
+	    print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
+	    return '/adm/notfound.html';
+	}
+	close(FH);
+    }
+    if ($parser eq 'parse') {
+        my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
+						   $codebase);
+        unless ($parse_result eq 'ok') {
+            &logthis('Failed to parse '.$filepath.$file.
+		     ' for embedded media: '.$parse_result); 
+        }
     }
 # Notify homeserver to grep it
 #
+    my $docuhome=&homeserver($docuname,$docudom);
     my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
     if ($fetchresult eq 'ok') {
 #
@@ -1427,10 +1451,118 @@ sub finishuserfileupload {
     }    
 }
 
+sub extract_embedded_items {
+    my ($filepath,$file,$allfiles,$codebase,$content) = @_;
+    my @state = ();
+    my %javafiles = (
+                      codebase => '',
+                      code => '',
+                      archive => ''
+                    );
+    my %mediafiles = (
+                      src => '',
+                      movie => '',
+                     );
+    my $p;
+    if ($content) {
+        $p = HTML::LCParser->new($content);
+    } else {
+        $p = HTML::LCParser->new($filepath.'/'.$file);
+    }
+    while (my $t=$p->get_token()) {
+	if ($t->[0] eq 'S') {
+	    my ($tagname, $attr) = ($t->[1],$t->[2]);
+	    push (@state, $tagname);
+            if (lc($tagname) eq 'allow') {
+                &add_filetype($allfiles,$attr->{'src'},'src');
+            }
+	    if (lc($tagname) eq 'img') {
+		&add_filetype($allfiles,$attr->{'src'},'src');
+	    }
+            if (lc($tagname) eq 'script') {
+                if ($attr->{'archive'} =~ /\.jar$/i) {
+                    &add_filetype($allfiles,$attr->{'archive'},'archive');
+                } else {
+                    &add_filetype($allfiles,$attr->{'src'},'src');
+                }
+            }
+            if (lc($tagname) eq 'link') {
+                if (lc($attr->{'rel'}) eq 'stylesheet') { 
+                    &add_filetype($allfiles,$attr->{'href'},'href');
+                }
+            }
+	    if (lc($tagname) eq 'object' ||
+		(lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
+		foreach my $item (keys(%javafiles)) {
+		    $javafiles{$item} = '';
+		}
+	    }
+	    if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
+		my $name = lc($attr->{'name'});
+		foreach my $item (keys(%javafiles)) {
+		    if ($name eq $item) {
+			$javafiles{$item} = $attr->{'value'};
+			last;
+		    }
+		}
+		foreach my $item (keys(%mediafiles)) {
+		    if ($name eq $item) {
+			&add_filetype($allfiles, $attr->{'value'}, 'value');
+			last;
+		    }
+		}
+	    }
+	    if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
+		foreach my $item (keys(%javafiles)) {
+		    if ($attr->{$item}) {
+			$javafiles{$item} = $attr->{$item};
+			last;
+		    }
+		}
+		foreach my $item (keys(%mediafiles)) {
+		    if ($attr->{$item}) {
+			&add_filetype($allfiles,$attr->{$item},$item);
+			last;
+		    }
+		}
+	    }
+	} elsif ($t->[0] eq 'E') {
+	    my ($tagname) = ($t->[1]);
+	    if ($javafiles{'codebase'} ne '') {
+		$javafiles{'codebase'} .= '/';
+	    }  
+	    if (lc($tagname) eq 'applet' ||
+		lc($tagname) eq 'object' ||
+		(lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
+		) {
+		foreach my $item (keys(%javafiles)) {
+		    if ($item ne 'codebase' && $javafiles{$item} ne '') {
+			my $file=$javafiles{'codebase'}.$javafiles{$item};
+			&add_filetype($allfiles,$file,$item);
+		    }
+		}
+	    } 
+	    pop @state;
+	}
+    }
+    return 'ok';
+}
+
+sub add_filetype {
+    my ($allfiles,$file,$type)=@_;
+    if (exists($allfiles->{$file})) {
+	unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
+	    push(@{$allfiles->{$file}}, &escape($type));
+	}
+    } else {
+	@{$allfiles->{$file}} = (&escape($type));
+    }
+}
+
 sub removeuploadedurl {
     my ($url)=@_;
     my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
-    return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
+    return &removeuserfile($uname,$udom,$fname);
 }
 
 sub removeuserfile {
@@ -1484,7 +1616,7 @@ sub flushcourselogs {
         } else {
             &logthis('Failed to flush log buffer for '.$crsid);
             if (length($courselogs{$crsid})>40000) {
-               &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
+               &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
                         " exceeded maximum size, deleting.</font>");
                delete $courselogs{$crsid};
             }
@@ -1492,12 +1624,12 @@ sub flushcourselogs {
         if ($courseidbuffer{$coursehombuf{$crsid}}) {
            $courseidbuffer{$coursehombuf{$crsid}}.='&'.
 			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
-                         '='.&escape($courseinstcodebuf{$crsid});
+                         ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
         } else {
            $courseidbuffer{$coursehombuf{$crsid}}=
 			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
-                         '='.&escape($courseinstcodebuf{$crsid});
-        }    
+                         ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
+        }
     }
 #
 # Write course id database (reverse lookup) to homeserver of courses 
@@ -1516,9 +1648,9 @@ sub flushcourselogs {
             ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
             if (! defined($dom) || $dom eq '' || 
                 ! defined($name) || $name eq '') {
-                my $cid = $ENV{'request.course.id'};
-                $dom  = $ENV{'request.'.$cid.'.domain'};
-                $name = $ENV{'request.'.$cid.'.num'};
+                my $cid = $env{'request.course.id'};
+                $dom  = $env{'request.'.$cid.'.domain'};
+                $name = $env{'request.'.$cid.'.num'};
             }
             my $value = $accesshash{$entry};
             my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
@@ -1555,42 +1687,81 @@ sub flushcourselogs {
 	    delete $userrolehash{$entry};
         }
     }
+#
+# Reverse lookup of domain roles (dc, ad, li, sc, au)
+#
+    my %domrolebuffer = ();
+    foreach my $entry (keys %domainrolehash) {
+        my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
+        if ($domrolebuffer{$rudom}) {
+            $domrolebuffer{$rudom}.='&'.&escape($entry).
+                      '='.&escape($domainrolehash{$entry});
+        } else {
+            $domrolebuffer{$rudom}.=&escape($entry).
+                      '='.&escape($domainrolehash{$entry});
+        }
+        delete $domainrolehash{$entry};
+    }
+    foreach my $dom (keys(%domrolebuffer)) {
+        foreach my $tryserver (keys %libserv) {
+            if ($hostdom{$tryserver} eq $dom) {
+                unless (&reply('domroleput:'.$dom.':'.
+                  $domrolebuffer{$dom},$tryserver) eq 'ok') {
+                    &logthis('Put of domain roles failed for '.$dom.' and  '.$tryserver);
+                }
+            }
+        }
+    }
     $dumpcount++;
 }
 
 sub courselog {
     my $what=shift;
     $what=time.':'.$what;
-    unless ($ENV{'request.course.id'}) { return ''; }
-    $coursedombuf{$ENV{'request.course.id'}}=
-       $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
-    $coursenumbuf{$ENV{'request.course.id'}}=
-       $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
-    $coursehombuf{$ENV{'request.course.id'}}=
-       $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
-    $coursedescrbuf{$ENV{'request.course.id'}}=
-       $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
-    $courseinstcodebuf{$ENV{'request.course.id'}}=
-       $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
-    if (defined $courselogs{$ENV{'request.course.id'}}) {
-	$courselogs{$ENV{'request.course.id'}}.='&'.$what;
+    unless ($env{'request.course.id'}) { return ''; }
+    $coursedombuf{$env{'request.course.id'}}=
+       $env{'course.'.$env{'request.course.id'}.'.domain'};
+    $coursenumbuf{$env{'request.course.id'}}=
+       $env{'course.'.$env{'request.course.id'}.'.num'};
+    $coursehombuf{$env{'request.course.id'}}=
+       $env{'course.'.$env{'request.course.id'}.'.home'};
+    $coursedescrbuf{$env{'request.course.id'}}=
+       $env{'course.'.$env{'request.course.id'}.'.description'};
+    $courseinstcodebuf{$env{'request.course.id'}}=
+       $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
+    $courseownerbuf{$env{'request.course.id'}}=
+       $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
+    if (defined $courselogs{$env{'request.course.id'}}) {
+	$courselogs{$env{'request.course.id'}}.='&'.$what;
     } else {
-	$courselogs{$ENV{'request.course.id'}}.=$what;
+	$courselogs{$env{'request.course.id'}}.=$what;
     }
-    if (length($courselogs{$ENV{'request.course.id'}})>4048) {
+    if (length($courselogs{$env{'request.course.id'}})>4048) {
 	&flushcourselogs();
     }
 }
 
 sub courseacclog {
     my $fnsymb=shift;
-    unless ($ENV{'request.course.id'}) { return ''; }
-    my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
-    if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
+    unless ($env{'request.course.id'}) { return ''; }
+    my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
+    if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
         $what.=':POST';
-	foreach (keys %ENV) {
+        # FIXME: Probably ought to escape things....
+	foreach (keys %env) {
             if ($_=~/^form\.(.*)/) {
-		$what.=':'.$1.'='.$ENV{$_};
+		$what.=':'.$1.'='.$env{$_};
+            }
+        }
+    } elsif ($fnsymb =~ m:^/adm/searchcat:) {
+        # FIXME: We should not be depending on a form parameter that someone
+        # editing lonsearchcat.pm might change in the future.
+        if ($env{'form.phase'} eq 'course_search') {
+            $what.= ':POST';
+            # FIXME: Probably ought to escape things....
+            foreach my $element ('courseexp','crsfulltext','crsrelated',
+                                 'crsdiscuss') {
+                $what.=':'.$element.'='.$env{'form.'.$element};
             }
         }
     }
@@ -1600,8 +1771,8 @@ sub courseacclog {
 sub countacc {
     my $url=&declutter(shift);
     return if (! defined($url) || $url eq '');
-    unless ($ENV{'request.course.id'}) { return ''; }
-    $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
+    unless ($env{'request.course.id'}) { return ''; }
+    $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
     my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
     $accesshash{$key}++;
 }
@@ -1616,19 +1787,29 @@ sub linklog {
   
 sub userrolelog {
     my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
-    if (($trole=~/^ca/) || ($trole=~/^in/) || 
-        ($trole=~/^cc/) || ($trole=~/^ep/) ||
-        ($trole=~/^cr/) || ($trole=~/^ta/)) {
+    if (($trole=~/^ca/) || ($trole=~/^aa/) ||
+        ($trole=~/^in/) || ($trole=~/^cc/) ||
+        ($trole=~/^ep/) || ($trole=~/^cr/) ||
+        ($trole=~/^ta/)) {
        my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
        $userrolehash
          {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
                     =$tend.':'.$tstart;
-   }
+    }
+    if (($trole=~/^dc/) || ($trole=~/^ad/) ||
+        ($trole=~/^li/) || ($trole=~/^li/) ||
+        ($trole=~/^au/) || ($trole=~/^dg/) ||
+        ($trole=~/^sc/)) {
+       my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
+       $domainrolehash
+         {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
+                    = $tend.':'.$tstart;
+    }
 }
 
 sub get_course_adv_roles {
     my $cid=shift;
-    $cid=$ENV{'request.course.id'} unless (defined($cid));
+    $cid=$env{'request.course.id'} unless (defined($cid));
     my %coursehash=&coursedescription($cid);
     my %nothide=();
     foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
@@ -1644,9 +1825,14 @@ sub get_course_adv_roles {
         if (($tend) && ($tend<$now)) { next; }
         if (($tstart) && ($now<$tstart)) { next; }
         my ($role,$username,$domain,$section)=split(/\:/,$_);
+	if ($username eq '' || $domain eq '') { next; }
 	if ((&privileged($username,$domain)) && 
 	    (!$nothide{$username.':'.$domain})) { next; }
+	if ($role eq 'cr') { next; }
         my $key=&plaintext($role);
+	if ($role =~ /^cr/) {
+	    $key=(split('/',$role))[3];
+	}
         if ($section) { $key.=' (Sec/Grp '.$section.')'; }
         if ($returnhash{$key}) {
 	    $returnhash{$key}.=','.$username.':'.$domain;
@@ -1659,8 +1845,8 @@ sub get_course_adv_roles {
 
 sub get_my_roles {
     my ($uname,$udom)=@_;
-    unless (defined($uname)) { $uname=$ENV{'user.name'}; }
-    unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
+    unless (defined($uname)) { $uname=$env{'user.name'}; }
+    unless (defined($udom)) { $udom=$env{'user.domain'}; }
     my %dumphash=
             &dump('nohist_userroles',$udom,$uname);
     my %returnhash=();
@@ -1715,7 +1901,7 @@ sub courseidput {
 }
 
 sub courseiddump {
-    my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
+    my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
     my %returnhash=();
     unless ($domfilter) { $domfilter=''; }
     foreach my $tryserver (keys %libserv) {
@@ -1723,7 +1909,8 @@ sub courseiddump {
 	    if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
 	        foreach (
                  split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
-			       $sincefilter.':'.&escape($descfilter),
+			       $sincefilter.':'.&escape($descfilter).':'.
+                               &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
                                $tryserver))) {
 		    my ($key,$value)=split(/\=/,$_);
                     if (($key) && ($value)) {
@@ -1736,7 +1923,62 @@ sub courseiddump {
     return %returnhash;
 }
 
-#
+# ---------------------------------------------------------- DC e-mail
+
+sub dcmailput {
+    my ($domain,$msgid,$message,$server)=@_;
+    my $status = &Apache::lonnet::critical(
+       'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
+       &Apache::lonnet::escape($message),$server);
+    return $status;
+}
+
+sub dcmaildump {
+    my ($dom,$startdate,$enddate,$senders) = @_;
+    my %returnhash=();
+    if (exists($domain_primary{$dom})) {
+        my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
+                                                         &escape($enddate).':';
+	my @esc_senders=map { &escape($_)} @$senders;
+	$cmd.=&escape(join('&',@esc_senders));
+	foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
+            my ($key,$value) = split(/\=/,$_);
+            if (($key) && ($value)) {
+                $returnhash{&unescape($key)} = &unescape($value);
+            }
+        }
+    }
+    return %returnhash;
+}
+# ---------------------------------------------------------- Domain roles
+
+sub get_domain_roles {
+    my ($dom,$roles,$startdate,$enddate)=@_;
+    if (undef($startdate) || $startdate eq '') {
+        $startdate = '.';
+    }
+    if (undef($enddate) || $enddate eq '') {
+        $enddate = '.';
+    }
+    my $rolelist = join(':',@{$roles});
+    my %personnel = ();
+    foreach my $tryserver (keys(%libserv)) {
+        if ($hostdom{$tryserver} eq $dom) {
+            %{$personnel{$tryserver}}=();
+            foreach (
+                split(/\&/,&reply('domrolesdump:'.$dom.':'.
+                   &escape($startdate).':'.&escape($enddate).':'.
+                   &escape($rolelist), $tryserver))) {
+                my($key,$value) = split(/\=/,$_);
+                if (($key) && ($value)) {
+                    $personnel{$tryserver}{&unescape($key)} = &unescape($value);
+                }
+            }
+        }
+    }
+    return %personnel;
+}
+
 # ----------------------------------------------------------- Check out an item
 
 sub get_first_access {
@@ -1744,19 +1986,27 @@ sub get_first_access {
     my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
     if ($argsymb) { $symb=$argsymb; }
     my ($map,$id,$res)=&decode_symb($symb);
-    if ($type eq 'map') { $res=$map; }
-    my %times=&get('firstaccesstimes',[$res],$udom,$uname);
-    return $times{$res};
+    if ($type eq 'map') {
+	$res=&symbread($map);
+    } else {
+	$res=$symb;
+    }
+    my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
+    return $times{"$courseid\0$res"};
 }
 
 sub set_first_access {
     my ($type)=@_;
     my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
     my ($map,$id,$res)=&decode_symb($symb);
-    if ($type eq 'map') { $res=$map; }
-    my $firstaccess=&get_first_access($type);
+    if ($type eq 'map') {
+	$res=&symbread($map);
+    } else {
+	$res=$symb;
+    }
+    my $firstaccess=&get_first_access($type,$symb);
     if (!$firstaccess) {
-	return &put('firstaccesstimes',{$res=>time},$udom,$uname);
+	return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
     }
     return 'already_set';
 }
@@ -1774,7 +2024,7 @@ sub checkout {
 		 $now.'&'.$ENV{'REMOTE_ADDR'});
     my $token=&reply('tmpput:'.$infostr,$lonhost);
     if ($token=~/^error\:/) { 
-        &logthis("<font color=blue>WARNING: ".
+        &logthis("<font color=\"blue\">WARNING: ".
                 "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
                  "</font>");
         return ''; 
@@ -1790,7 +2040,7 @@ sub checkout {
     unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
        return '';
     } else {
-        &logthis("<font color=blue>WARNING: ".
+        &logthis("<font color=\"blue\">WARNING: ".
                 "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
                  "</font>");
     }    
@@ -1800,7 +2050,7 @@ sub checkout {
                                                  $token)) ne 'ok') {
 	return '';
     } else {
-        &logthis("<font color=blue>WARNING: ".
+        &logthis("<font color=\"blue\">WARNING: ".
                 "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
                  "</font>");
     }
@@ -1814,7 +2064,7 @@ sub checkin {
     my $now=time;
     my ($ta,$tb,$lonhost)=split(/\*/,$token);
     $lonhost=~tr/A-Z/a-z/;
-    my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
+    my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
     $dtoken=~s/\W/\_/g;
     my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
                  split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
@@ -1826,7 +2076,7 @@ sub checkin {
     
     unless (&allowed('mgr',$tcrsid)) {
         &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
-                 $ENV{'user.name'}.' - '.$ENV{'user.domain'});
+                 $env{'user.name'}.' - '.$env{'user.domain'});
         return '';
     }
 
@@ -1850,15 +2100,15 @@ sub checkin {
 
 sub expirespread {
     my ($uname,$udom,$stype,$usymb)=@_;
-    my $cid=$ENV{'request.course.id'}; 
+    my $cid=$env{'request.course.id'}; 
     if ($cid) {
        my $now=time;
        my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
-       return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
-                            $ENV{'course.'.$cid.'.num'}.
+       return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
+                            $env{'course.'.$cid.'.num'}.
 	        	    ':nohist_expirationdates:'.
                             &escape($key).'='.$now,
-                            $ENV{'course.'.$cid.'.home'})
+                            $env{'course.'.$cid.'.home'})
     }
     return 'ok';
 }
@@ -1867,18 +2117,19 @@ sub expirespread {
 
 sub devalidate {
     my ($symb,$uname,$udom)=@_;
-    my $cid=$ENV{'request.course.id'}; 
+    my $cid=$env{'request.course.id'}; 
     if ($cid) {
         # delete the stored spreadsheets for
         # - the student level sheet of this user in course's homespace
         # - the assessment level sheet for this resource 
         #   for this user in user's homespace
+	# - current conditional state info
 	my $key=$uname.':'.$udom.':';
         my $status=
 	    &del('nohist_calculatedsheets',
 		 [$key.'studentcalc:'],
-		 $ENV{'course.'.$cid.'.domain'},
-		 $ENV{'course.'.$cid.'.num'})
+		 $env{'course.'.$cid.'.domain'},
+		 $env{'course.'.$cid.'.num'})
 		.' '.
 	    &del('nohist_calculatedsheets_'.$cid,
 		 [$key.'assesscalc:'.$symb],$udom,$uname);
@@ -1887,6 +2138,7 @@ sub devalidate {
                     $uname.' at '.$udom.' for '.
 		    $symb.': '.$status);
         }
+	&delenv('user.state.'.$cid);
     }
 }
 
@@ -2087,17 +2339,19 @@ sub tmpreset {
   my ($symb,$namespace,$domain,$stuname) = @_;
   if (!$symb) {
     $symb=&symbread();
-    if (!$symb) { $symb= $ENV{'request.url'}; }
+    if (!$symb) { $symb= $env{'request.url'}; }
   }
   $symb=escape($symb);
 
-  if (!$namespace) { $namespace=$ENV{'request.state'}; }
+  if (!$namespace) { $namespace=$env{'request.state'}; }
   $namespace=~s/\//\_/g;
   $namespace=~s/\W//g;
 
-  #FIXME needs to do something for /pub resources
-  if (!$domain) { $domain=$ENV{'user.domain'}; }
-  if (!$stuname) { $stuname=$ENV{'user.name'}; }
+  if (!$domain) { $domain=$env{'user.domain'}; }
+  if (!$stuname) { $stuname=$env{'user.name'}; }
+  if ($domain eq 'public' && $stuname eq 'public') {
+      $stuname=$ENV{'REMOTE_ADDR'};
+  }
   my $path=$perlvar{'lonDaemons'}.'/tmp';
   my %hash;
   if (tie(%hash,'GDBM_File',
@@ -2116,23 +2370,25 @@ sub tmpstore {
 
   if (!$symb) {
     $symb=&symbread();
-    if (!$symb) { $symb= $ENV{'request.url'}; }
+    if (!$symb) { $symb= $env{'request.url'}; }
   }
   $symb=escape($symb);
 
   if (!$namespace) {
     # I don't think we would ever want to store this for a course.
     # it seems this will only be used if we don't have a course.
-    #$namespace=$ENV{'request.course.id'};
+    #$namespace=$env{'request.course.id'};
     #if (!$namespace) {
-      $namespace=$ENV{'request.state'};
+      $namespace=$env{'request.state'};
     #}
   }
   $namespace=~s/\//\_/g;
   $namespace=~s/\W//g;
-#FIXME needs to do something for /pub resources
-  if (!$domain) { $domain=$ENV{'user.domain'}; }
-  if (!$stuname) { $stuname=$ENV{'user.name'}; }
+  if (!$domain) { $domain=$env{'user.domain'}; }
+  if (!$stuname) { $stuname=$env{'user.name'}; }
+  if ($domain eq 'public' && $stuname eq 'public') {
+      $stuname=$ENV{'REMOTE_ADDR'};
+  }
   my $now=time;
   my %hash;
   my $path=$perlvar{'lonDaemons'}.'/tmp';
@@ -2144,7 +2400,7 @@ sub tmpstore {
     my $allkeys=''; 
     foreach my $key (keys(%$storehash)) {
       $allkeys.=$key.':';
-      $hash{"$version:$symb:$key"}=$$storehash{$key};
+      $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
     }
     $hash{"$version:$symb:timestamp"}=$now;
     $allkeys.='timestamp';
@@ -2166,15 +2422,17 @@ sub tmprestore {
 
   if (!$symb) {
     $symb=&symbread();
-    if (!$symb) { $symb= $ENV{'request.url'}; }
+    if (!$symb) { $symb= $env{'request.url'}; }
   }
   $symb=escape($symb);
 
-  if (!$namespace) { $namespace=$ENV{'request.state'}; }
-  #FIXME needs to do something for /pub resources
-  if (!$domain) { $domain=$ENV{'user.domain'}; }
-  if (!$stuname) { $stuname=$ENV{'user.name'}; }
+  if (!$namespace) { $namespace=$env{'request.state'}; }
 
+  if (!$domain) { $domain=$env{'user.domain'}; }
+  if (!$stuname) { $stuname=$env{'user.name'}; }
+  if ($domain eq 'public' && $stuname eq 'public') {
+      $stuname=$ENV{'REMOTE_ADDR'};
+  }
   my %returnhash;
   $namespace=~s/\//\_/g;
   $namespace=~s/\W//g;
@@ -2192,8 +2450,8 @@ sub tmprestore {
       my $key;
       $returnhash{"$scope:keys"}=$vkeys;
       foreach $key (@keys) {
-	$returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
-	$returnhash{"$key"}=$hash{"$scope:$symb:$key"};
+	$returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
+	$returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
       }
     }
     if (!(untie(%hash))) {
@@ -2216,25 +2474,25 @@ sub store {
     $symb=&symbclean($symb);
     if (!$symb) { unless ($symb=&symbread()) { return ''; } }
 
-    if (!$domain) { $domain=$ENV{'user.domain'}; }
-    if (!$stuname) { $stuname=$ENV{'user.name'}; }
+    if (!$domain) { $domain=$env{'user.domain'}; }
+    if (!$stuname) { $stuname=$env{'user.name'}; }
 
     &devalidate($symb,$stuname,$domain);
 
     $symb=escape($symb);
     if (!$namespace) { 
-       unless ($namespace=$ENV{'request.course.id'}) { 
+       unless ($namespace=$env{'request.course.id'}) { 
           return ''; 
        } 
     }
-    if (!$home) { $home=$ENV{'user.home'}; }
+    if (!$home) { $home=$env{'user.home'}; }
 
     $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
     $$storehash{'host'}=$perlvar{'lonHostID'};
 
     my $namevalue='';
     foreach (keys %$storehash) {
-        $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
+        $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
     }
     $namevalue=~s/\&$//;
     &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
@@ -2252,25 +2510,25 @@ sub cstore {
     $symb=&symbclean($symb);
     if (!$symb) { unless ($symb=&symbread()) { return ''; } }
 
-    if (!$domain) { $domain=$ENV{'user.domain'}; }
-    if (!$stuname) { $stuname=$ENV{'user.name'}; }
+    if (!$domain) { $domain=$env{'user.domain'}; }
+    if (!$stuname) { $stuname=$env{'user.name'}; }
 
     &devalidate($symb,$stuname,$domain);
 
     $symb=escape($symb);
     if (!$namespace) { 
-       unless ($namespace=$ENV{'request.course.id'}) { 
+       unless ($namespace=$env{'request.course.id'}) { 
           return ''; 
        } 
     }
-    if (!$home) { $home=$ENV{'user.home'}; }
+    if (!$home) { $home=$env{'user.home'}; }
 
     $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
     $$storehash{'host'}=$perlvar{'lonHostID'};
 
     my $namevalue='';
     foreach (keys %$storehash) {
-        $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
+        $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
     }
     $namevalue=~s/\&$//;
     &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
@@ -2292,19 +2550,19 @@ sub restore {
       $symb=&escape(&symbclean($symb));
     }
     if (!$namespace) { 
-       unless ($namespace=$ENV{'request.course.id'}) { 
+       unless ($namespace=$env{'request.course.id'}) { 
           return ''; 
        } 
     }
-    if (!$domain) { $domain=$ENV{'user.domain'}; }
-    if (!$stuname) { $stuname=$ENV{'user.name'}; }
-    if (!$home) { $home=$ENV{'user.home'}; }
+    if (!$domain) { $domain=$env{'user.domain'}; }
+    if (!$stuname) { $stuname=$env{'user.name'}; }
+    if (!$home) { $home=$env{'user.home'}; }
     my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
 
     my %returnhash=();
     foreach (split(/\&/,$answer)) {
 	my ($name,$value)=split(/\=/,$_);
-        $returnhash{&unescape($name)}=&unescape($value);
+        $returnhash{&unescape($name)}=&thaw_unescape($value);
     }
     my $version;
     for ($version=1;$version<=$returnhash{'version'};$version++) {
@@ -2340,7 +2598,7 @@ sub coursedescription {
            }
            $returnhash{'url'}=&clutter($returnhash{'url'});
            $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
-	       $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
+	       $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
            $envhash{'course.'.$normalid.'.home'}=$chome;
            $envhash{'course.'.$normalid.'.domain'}=$cdomain;
            $envhash{'course.'.$normalid.'.num'}=$cnum;
@@ -2360,7 +2618,7 @@ sub privileged {
     my $now=time;
     if ($rolesdump ne '') {
         foreach (split(/&/,$rolesdump)) {
-	    if ($_!~/^rolesdef\&/) {
+	    if ($_!~/^rolesdef_/) {
 		my ($area,$role)=split(/=/,$_);
 		$area=~s/\_\w\w$//;
 		my ($trole,$tend,$tstart)=split(/_/,$role);
@@ -2387,110 +2645,164 @@ sub rolesinit {
     my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
     if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
     my %allroles=();
-    my %thesepriv=();
+    my %allgroups=();   
     my $now=time;
     my $userroles="user.login.time=$now\n";
-    my $thesestr;
+    my $group_privs;
 
     if ($rolesdump ne '') {
         foreach (split(/&/,$rolesdump)) {
-	  if ($_!~/^rolesdef\&/) {
+	  if ($_!~/^rolesdef_/) {
             my ($area,$role)=split(/=/,$_);
-            $area=~s/\_\w\w$//;
-            my ($trole,$tend,$tstart)=split(/_/,$role);
-            $userroles.='user.role.'.$trole.'.'.$area.'='.
-                        $tstart.'.'.$tend."\n";
-# log the associated role with the area
-            &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
-            if ($tend!=0) {
-	        if ($tend<$now) {
-	            $trole='';
-                } 
-            }
-            if ($tstart!=0) {
-                if ($tstart>$now) {
-                   $trole='';        
-                }
-            }
+	    $area=~s/\_\w\w$//;
+            my ($trole,$tend,$tstart,$group_privs);
+	    if ($role=~/^cr/) { 
+		if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
+		    ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
+		    ($tend,$tstart)=split('_',$trest);
+		} else {
+		    $trole=$role;
+		}
+            } elsif ($role =~ m|^gr/|) {
+                ($trole,$tend,$tstart) = split(/_/,$role);
+                ($trole,$group_privs) = split(/\//,$trole);
+                $group_privs = &unescape($group_privs);
+	    } else {
+		($trole,$tend,$tstart)=split(/_/,$role);
+	    }
+            $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
+            if (($tend!=0) && ($tend<$now)) { $trole=''; }
+            if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
             if (($area ne '') && ($trole ne '')) {
 		my $spec=$trole.'.'.$area;
 		my ($tdummy,$tdomain,$trest)=split(/\//,$area);
 		if ($trole =~ /^cr\//) {
-		    my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
- 		    my $homsvr=homeserver($rauthor,$rdomain);
-		    if ($hostname{$homsvr} ne '') {
-			my ($rdummy,$roledef)=
-			   &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
-				
-			if (($rdummy ne 'con_lost') && ($roledef ne '')) {
-			    my ($syspriv,$dompriv,$coursepriv)=
-				split(/\_/,$roledef);
-			    if (defined($syspriv)) {
-				$allroles{'cm./'}.=':'.$syspriv;
-				$allroles{$spec.'./'}.=':'.$syspriv;
-			    }
-			    if ($tdomain ne '') {
-				if (defined($dompriv)) {
-				    $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
-				    $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
-				}
-				if ($trest ne '') {
-				    if (defined($coursepriv)) {
-					$allroles{'cm.'.$area}.=':'.$coursepriv;
-					$allroles{$spec.'.'.$area}.=':'.$coursepriv;
-				    }
-				}
-			    }
-			}
-		    }
+                    &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
+                } elsif ($trole eq 'gr') {
+                    &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
 		} else {
-		    if (defined($pr{$trole.':s'})) {
-			$allroles{'cm./'}.=':'.$pr{$trole.':s'};
-			$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
-		    }
-		    if ($tdomain ne '') {
-			if (defined($pr{$trole.':d'})) {
-			    $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
-			    $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
-			}
-			if ($trest ne '') {
-			    if (defined($pr{$trole.':c'})) {
-				$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
-				$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
-			    }
-			}
-		    }
+                    &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
 		}
             }
-          } 
+          }
         }
-        my $adv=0;
-        my $author=0;
-        foreach (keys %allroles) {
-            %thesepriv=();
-            if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
-            if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
-            foreach (split(/:/,$allroles{$_})) {
-                if ($_ ne '') {
-		    my ($privilege,$restrictions)=split(/&/,$_);
-                    if ($restrictions eq '') {
-			$thesepriv{$privilege}='F';
-                    } else {
-                        if ($thesepriv{$privilege} ne 'F') {
-			    $thesepriv{$privilege}.=$restrictions;
-                        }
+        my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
+        $userroles.='user.adv='.$adv."\n".
+	            'user.author='.$author."\n";
+        $env{'user.adv'}=$adv;
+    }
+    return $userroles;  
+}
+
+sub set_arearole {
+    my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
+# log the associated role with the area
+    &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
+    return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
+}
+
+sub custom_roleprivs {
+    my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
+    my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
+    my $homsvr=homeserver($rauthor,$rdomain);
+    if ($hostname{$homsvr} ne '') {
+        my ($rdummy,$roledef)=
+            &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
+        if (($rdummy ne 'con_lost') && ($roledef ne '')) {
+            my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
+            if (defined($syspriv)) {
+                $$allroles{'cm./'}.=':'.$syspriv;
+                $$allroles{$spec.'./'}.=':'.$syspriv;
+            }
+            if ($tdomain ne '') {
+                if (defined($dompriv)) {
+                    $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
+                    $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
+                }
+                if (($trest ne '') && (defined($coursepriv))) {
+                    $$allroles{'cm.'.$area}.=':'.$coursepriv;
+                    $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
+                }
+            }
+        }
+    }
+}
+
+sub group_roleprivs {
+    my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
+    my $access = 1;
+    my $now = time;
+    if (($tend!=0) && ($tend<$now)) { $access = 0; }
+    if (($tstart!=0) && ($tstart>$now)) { $access=0; }
+    if ($access) {
+        my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
+        $$allgroups{$course}{$group} .=':'.$group_privs;
+    }
+}
+
+sub standard_roleprivs {
+    my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
+    if (defined($pr{$trole.':s'})) {
+        $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
+        $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
+    }
+    if ($tdomain ne '') {
+        if (defined($pr{$trole.':d'})) {
+            $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
+            $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
+        }
+        if (($trest ne '') && (defined($pr{$trole.':c'}))) {
+            $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
+            $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
+        }
+    }
+}
+
+sub set_userprivs {
+    my ($userroles,$allroles,$allgroups) = @_; 
+    my $author=0;
+    my $adv=0;
+    my %grouproles = ();
+    if (keys(%{$allgroups}) > 0) {
+        foreach my $role (keys %{$allroles}) {
+            my ($trole,$area,$sec,$extendedarea);
+            if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
+                $trole = $1;
+                $area = $2;
+                $sec = $3;
+                $extendedarea = $area.$sec;
+                if (exists($$allgroups{$area})) {
+                    foreach my $group (keys(%{$$allgroups{$area}})) {
+                        my $spec = $trole.'.'.$extendedarea;
+                        $grouproles{$spec.'.'.$area.'/'.$group} = 
+                                                $$allgroups{$area}{$group};
                     }
                 }
             }
-            $thesestr='';
-            foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
-            $userroles.='user.priv.'.$_.'='.$thesestr."\n";
         }
-        $userroles.='user.adv='.$adv."\n".
-	            'user.author='.$author."\n";
-        $ENV{'user.adv'}=$adv;
     }
-    return $userroles;  
+    foreach (keys(%grouproles)) {
+        $$allroles{$_} = $grouproles{$_};
+    }
+    foreach (keys %{$allroles}) {
+        my %thesepriv=();
+        if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
+        foreach (split(/:/,$$allroles{$_})) {
+            if ($_ ne '') {
+                my ($privilege,$restrictions)=split(/&/,$_);
+                if ($restrictions eq '') {
+                    $thesepriv{$privilege}='F';
+                } elsif ($thesepriv{$privilege} ne 'F') {
+                    $thesepriv{$privilege}.=$restrictions;
+                }
+                if ($thesepriv{'adv'} eq 'F') { $adv=1; }
+            }
+        }
+        my $thesestr='';
+        foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
+        $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
+    }
+    return ($author,$adv);
 }
 
 # --------------------------------------------------------------- get interface
@@ -2502,8 +2814,8 @@ sub get {
        $items.=escape($_).'&';
    }
    $items=~s/\&$//;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
 
    my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
@@ -2514,7 +2826,7 @@ sub get {
    my %returnhash=();
    my $i=0;
    foreach (@$storearr) {
-      $returnhash{$_}=unescape($pairs[$i]);
+      $returnhash{$_}=&thaw_unescape($pairs[$i]);
       $i++;
    }
    return %returnhash;
@@ -2529,8 +2841,8 @@ sub del {
        $items.=escape($_).'&';
    }
    $items=~s/\&$//;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
 
    return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
@@ -2539,31 +2851,38 @@ sub del {
 # -------------------------------------------------------------- dump interface
 
 sub dump {
-   my ($namespace,$udomain,$uname,$regexp)=@_;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my ($namespace,$udomain,$uname,$regexp,$range)=@_;
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
    if ($regexp) {
        $regexp=&escape($regexp);
    } else {
        $regexp='.';
    }
-   my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
+   my $rep=reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
    my @pairs=split(/\&/,$rep);
    my %returnhash=();
    foreach (@pairs) {
-      my ($key,$value)=split(/=/,$_);
-      $returnhash{unescape($key)}=unescape($value);
+      my ($key,$value)=split(/=/,$_,2);
+      $returnhash{unescape($key)}=&thaw_unescape($value);
    }
    return %returnhash;
 }
 
+# --------------------------------------------------------- dumpstore interface
+
+sub dumpstore {
+   my ($namespace,$udomain,$uname,$regexp,$range)=@_;
+   return &dump($namespace,$udomain,$uname,$regexp,$range);
+}
+
 # -------------------------------------------------------------- keys interface
 
 sub getkeys {
    my ($namespace,$udomain,$uname)=@_;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
    my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
    my @keyarray=();
@@ -2576,9 +2895,9 @@ sub getkeys {
 # --------------------------------------------------------------- currentdump
 sub currentdump {
    my ($courseid,$sdom,$sname)=@_;
-   $courseid = $ENV{'request.course.id'} if (! defined($courseid));
-   $sdom     = $ENV{'user.domain'}       if (! defined($sdom));
-   $sname    = $ENV{'user.name'}         if (! defined($sname));
+   $courseid = $env{'request.course.id'} if (! defined($courseid));
+   $sdom     = $env{'user.domain'}       if (! defined($sdom));
+   $sname    = $env{'user.name'}         if (! defined($sname));
    my $uhome = &homeserver($sname,$sdom);
    my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
    return if ($rep =~ /^(error:|no_such_host)/);
@@ -2599,7 +2918,7 @@ sub currentdump {
            my ($key,$value)=split(/=/,$_);
            my ($symb,$param) = split(/:/,$key);
            $returnhash{&unescape($symb)}->{&unescape($param)} = 
-                                                          &unescape($value);
+                                                        &thaw_unescape($value);
        }
    }
    return %returnhash;
@@ -2632,12 +2951,18 @@ sub convert_dump_to_currentdump{
     return \%returnhash;
 }
 
+# ------------------------------------------------------ critical inc interface
+
+sub cinc {
+    return &inc(@_,'critical');
+}
+
 # --------------------------------------------------------------- inc interface
 
 sub inc {
-    my ($namespace,$store,$udomain,$uname) = @_;
-    if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-    if (!$uname) { $uname=$ENV{'user.name'}; }
+    my ($namespace,$store,$udomain,$uname,$critical) = @_;
+    if (!$udomain) { $udomain=$env{'user.domain'}; }
+    if (!$uname) { $uname=$env{'user.name'}; }
     my $uhome=&homeserver($uname,$udomain);
     my $items='';
     if (! ref($store)) {
@@ -2653,58 +2978,105 @@ sub inc {
         }
     }
     $items=~s/\&$//;
-    return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
+    if ($critical) {
+	return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
+    } else {
+	return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
+    }
 }
 
 # --------------------------------------------------------------- put interface
 
 sub put {
    my ($namespace,$storehash,$udomain,$uname)=@_;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
    my $items='';
    foreach (keys %$storehash) {
-       $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
+       $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
    }
    $items=~s/\&$//;
    return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
 }
 
-# ---------------------------------------------------------- putstore interface
-                                                                                     
-sub putstore {
+# ------------------------------------------------------------ newput interface
+
+sub newput {
    my ($namespace,$storehash,$udomain,$uname)=@_;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
    my $items='';
-   my %allitems = ();
-   foreach (keys %$storehash) {
-       if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
-           my $key = $1.':keys:'.$2;
-           $allitems{$key} .= $3.':';
-       }
-       $items.=$_.'='.&escape($$storehash{$_}).'&';
+   foreach my $key (keys(%$storehash)) {
+       $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
    }
-   foreach (keys %allitems) {
-       $allitems{$_} =~ s/\:$//;
-       $items.= $_.'='.$allitems{$_}.'&';
+   $items=~s/\&$//;
+   return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
+}
+
+# ---------------------------------------------------------  putstore interface
+
+sub putstore {
+   my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
+   my $items='';
+   foreach my $key (keys(%$storehash)) {
+       $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
    }
    $items=~s/\&$//;
-   return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
+   my $esc_symb=&escape($symb);
+   my $esc_v=&escape($version);
+   my $reply =
+       &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
+	      $uhome);
+   if ($reply eq 'unknown_cmd') {
+       # gfall back to way things use to be done
+       return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
+			    $uname);
+   }
+   return $reply;
+}
+
+sub old_putstore {
+    my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
+    if (!$udomain) { $udomain=$env{'user.domain'}; }
+    if (!$uname) { $uname=$env{'user.name'}; }
+    my $uhome=&homeserver($uname,$udomain);
+    my %newstorehash;
+    foreach (keys %$storehash) {
+	my $key = $version.':'.&escape($symb).':'.$_;
+	$newstorehash{$key} = $storehash->{$_};
+    }
+    my $items='';
+    my %allitems = ();
+    foreach (keys %newstorehash) {
+	if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
+	    my $key = $1.':keys:'.$2;
+	    $allitems{$key} .= $3.':';
+	}
+	$items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
+    }
+    foreach (keys %allitems) {
+	$allitems{$_} =~ s/\:$//;
+	$items.= $_.'='.$allitems{$_}.'&';
+    }
+    $items=~s/\&$//;
+    return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
 }
 
 # ------------------------------------------------------ critical put interface
 
 sub cput {
    my ($namespace,$storehash,$udomain,$uname)=@_;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
    my $items='';
    foreach (keys %$storehash) {
-       $items.=escape($_).'='.escape($$storehash{$_}).'&';
+       $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
    }
    $items=~s/\&$//;
    return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
@@ -2719,25 +3091,56 @@ sub eget {
        $items.=escape($_).'&';
    }
    $items=~s/\&$//;
-   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
-   if (!$uname) { $uname=$ENV{'user.name'}; }
+   if (!$udomain) { $udomain=$env{'user.domain'}; }
+   if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
    my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
    my @pairs=split(/\&/,$rep);
    my %returnhash=();
    my $i=0;
    foreach (@$storearr) {
-      $returnhash{$_}=unescape($pairs[$i]);
+      $returnhash{$_}=&thaw_unescape($pairs[$i]);
       $i++;
    }
    return %returnhash;
 }
 
+# ------------------------------------------------------------ tmpput interface
+sub tmpput {
+    my ($storehash,$server)=@_;
+    my $items='';
+    foreach (keys(%$storehash)) {
+	$items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
+    }
+    $items=~s/\&$//;
+    return &reply("tmpput:$items",$server);
+}
+
+# ------------------------------------------------------------ tmpget interface
+sub tmpget {
+    my ($token,$server)=@_;
+    if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
+    my $rep=&reply("tmpget:$token",$server);
+    my %returnhash;
+    foreach my $item (split(/\&/,$rep)) {
+	my ($key,$value)=split(/=/,$item);
+	$returnhash{&unescape($key)}=&thaw_unescape($value);
+    }
+    return %returnhash;
+}
+
+# ------------------------------------------------------------ tmpget interface
+sub tmpdel {
+    my ($token,$server)=@_;
+    if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
+    return &reply("tmpdel:$token",$server);
+}
+
 # ---------------------------------------------- Custom access rule evaluation
 
 sub customaccess {
     my ($priv,$uri)=@_;
-    my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
+    my ($urole,$urealm)=split(/\./,$env{'request.role'});
     $urealm=~s/^\W//;
     my ($udom,$ucrs,$usec)=split(/\//,$urealm);
     my $access=0;
@@ -2770,14 +3173,13 @@ sub customaccess {
 # ------------------------------------------------- Check for a user privilege
 
 sub allowed {
-    my ($priv,$uri)=@_;
+    my ($priv,$uri,$symb)=@_;
+    my $ver_orguri=$uri;
     $uri=&deversion($uri);
     my $orguri=$uri;
     $uri=&declutter($uri);
     
-    
-    
-    if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
+    if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
 # Free bre access to adm and meta resources
     if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|)) 
 	 || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
@@ -2785,33 +3187,50 @@ sub allowed {
     }
 
 # Free bre access to user's own portfolio contents
-    my ($space,$domain,$name,$dir)=split('/',$uri);
-    if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) && 
-	($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
+    my ($space,$domain,$name,@dir)=split('/',$uri);
+    if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) && 
+	($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
         return 'F';
     }
 
+# bre access to group if user has rgf priv for this group and course.
+    if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups') 
+         && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
+        if (exists($env{'request.course.id'})) {
+            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+            if (($domain eq $cdom) && ($name eq $cnum)) {
+                my $courseprivid=$env{'request.course.id'};
+                $courseprivid=~s/\_/\//;
+                if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
+                    .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
+                    return $1; 
+                }
+            }
+        }
+    }
+
 # Free bre to public access
 
     if ($priv eq 'bre') {
         my $copyright=&metadata($uri,'copyright');
-	if (($copyright eq 'public') && (!$ENV{'request.course.id'})) { 
+	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 $1)) {
+	    unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
 		return '';
             }
         }
         if ($copyright eq 'domain') {
             $uri=~/([^\/]+)\/([^\/]+)\//;
-	    unless (($ENV{'user.domain'} eq $1) ||
-                 ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
+	    unless (($env{'user.domain'} eq $1) ||
+                 ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
 		return '';
             }
         }
-        if ($ENV{'request.role'}=~ /li\.\//) {
+        if ($env{'request.role'}=~ /li\.\//) {
             # Library role, so allow browsing of resources in this domain.
             return 'F';
         }
@@ -2820,11 +3239,11 @@ sub allowed {
         }
     }
     # Domain coordinator is trying to create a course
-    if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
+    if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
         # uri is the requested domain in this case.
         # comparison to 'request.role.domain' shows if the user has selected
-        # a role of dc for the domain in question. 
-        return 'F' if ($uri eq $ENV{'request.role.domain'});
+        # a role of dc for the domain in question.
+        return 'F' if ($uri eq $env{'request.role.domain'});
     }
 
     my $thisallowed='';
@@ -2833,13 +3252,13 @@ sub allowed {
 
 # Course
 
-    if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
+    if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
        $thisallowed.=$1;
     }
 
 # Domain
 
-    if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
+    if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
        =~/\Q$priv\E\&([^\:]*)/) {
        $thisallowed.=$1;
     }
@@ -2849,20 +3268,43 @@ sub allowed {
     $courseuri=~s/\_(\d)/\/$1/;
     $courseuri=~s/^([^\/])/\/$1/;
 
-    if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
+    if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
        =~/\Q$priv\E\&([^\:]*)/) {
        $thisallowed.=$1;
     }
 
-# URI is an uploaded document for this course
+# Group: uri itself is a group
+    my $groupuri=$uri;
+    $groupuri=~s/^([^\/])/\/$1/;
+    if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
+       =~/\Q$priv\E\&([^\:]*)/) {
+       $thisallowed.=$1;
+    }
 
+# URI is an uploaded document for this course, default permissions don't matter
+# not allowing 'edit' access (editupload) to uploaded course docs
     if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
-	my $refuri=$ENV{'httpref.'.$orguri};
-	if ($refuri) {
-	    if ($refuri =~ m|^/adm/|) {
-		$thisallowed='F';
-	    }
-	}
+	$thisallowed='';
+        my ($match)=&is_on_map($uri);
+        if ($match) {
+            if ($env{'user.priv.'.$env{'request.role'}.'./'}
+                  =~/\Q$priv\E\&([^\:]*)/) {
+                $thisallowed.=$1;
+            }
+        } else {
+            my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
+            if ($refuri) {
+                if ($refuri =~ m|^/adm/|) {
+                    $thisallowed='F';
+                } else {
+                    $refuri=&declutter($refuri);
+                    my ($match) = &is_on_map($refuri);
+                    if ($match) {
+                        $thisallowed='F';
+                    }
+                }
+            }
+        }
     }
 
 # Full access at system, domain or course-wide level? Exit.
@@ -2873,7 +3315,16 @@ sub allowed {
 
 # If this is generating or modifying users, exit with special codes
 
-    if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
+    if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
+	if (($priv eq 'cca') || ($priv eq 'caa')) {
+	    my ($audom,$auname)=split('/',$uri);
+# no author name given, so this just checks on the general right to make a co-author in this domain
+	    unless ($auname) { return $thisallowed; }
+# an author name is given, so we are about to actually make a co-author for a certain account
+	    if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
+		(($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
+		 ($audom ne $env{'request.role.domain'}))) { return ''; }
+	}
 	return $thisallowed;
     }
 #
@@ -2882,18 +3333,18 @@ sub allowed {
 # Course: See if uri or referer is an individual resource that is part of 
 # the course
 
-    if ($ENV{'request.course.id'}) {
+    if ($env{'request.course.id'}) {
 
-       $courseprivid=$ENV{'request.course.id'};
-       if ($ENV{'request.course.sec'}) {
-          $courseprivid.='/'.$ENV{'request.course.sec'};
+       $courseprivid=$env{'request.course.id'};
+       if ($env{'request.course.sec'}) {
+          $courseprivid.='/'.$env{'request.course.sec'};
        }
        $courseprivid=~s/\_/\//;
        my $checkreferer=1;
        my ($match,$cond)=&is_on_map($uri);
        if ($match) {
            $statecond=$cond;
-           if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
+           if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
                =~/\Q$priv\E\&([^\:]*)/) {
                $thisallowed.=$1;
                $checkreferer=0;
@@ -2901,16 +3352,16 @@ sub allowed {
        }
        
        if ($checkreferer) {
-	  my $refuri=$ENV{'httpref.'.$orguri};
+	  my $refuri=$env{'httpref.'.$orguri};
             unless ($refuri) {
-                foreach (keys %ENV) {
+                foreach (keys %env) {
 		    if ($_=~/^httpref\..*\*/) {
 			my $pattern=$_;
                         $pattern=~s/^httpref\.\/res\///;
                         $pattern=~s/\*/\[\^\/\]\+/g;
                         $pattern=~s/\//\\\//g;
                         if ($orguri=~/$pattern/) {
-			    $refuri=$ENV{$_};
+			    $refuri=$env{$_};
                         }
                     }
                 }
@@ -2921,7 +3372,7 @@ sub allowed {
           my ($match,$cond)=&is_on_map($refuri);
             if ($match) {
               my $refstatecond=$cond;
-              if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
+              if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
                   =~/\Q$priv\E\&([^\:]*)/) {
                   $thisallowed.=$1;
                   $uri=$refuri;
@@ -2961,39 +3412,39 @@ sub allowed {
 
     my $envkey;
     if ($thisallowed=~/L/) {
-        foreach $envkey (keys %ENV) {
+        foreach $envkey (keys %env) {
            if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
                my $courseid=$2;
                my $roleid=$1.'.'.$2;
                $courseid=~s/^\///;
                my $expiretime=600;
-               if ($ENV{'request.role'} eq $roleid) {
+               if ($env{'request.role'} eq $roleid) {
 		  $expiretime=120;
                }
 	       my ($cdom,$cnum,$csec)=split(/\//,$courseid);
                my $prefix='course.'.$cdom.'_'.$cnum.'.';
-               if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
+               if ((time-$env{$prefix.'last_cache'})>$expiretime) {
 		   &coursedescription($courseid);
                }
-               if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
-                || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
-		   if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
-                       &log($ENV{'user.domain'},$ENV{'user.name'},
-                            $ENV{'user.home'},
+               if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
+                || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
+		   if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
+                       &log($env{'user.domain'},$env{'user.name'},
+                            $env{'user.home'},
                             'Locked by res: '.$priv.' for '.$uri.' due to '.
                             $cdom.'/'.$cnum.'/'.$csec.' expire '.
-                            $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
+                            $env{$prefix.'priv.'.$priv.'.lock.expire'});
 		       return '';
                    }
                }
-               if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
-                || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
-		   if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
-                       &log($ENV{'user.domain'},$ENV{'user.name'},
-                            $ENV{'user.home'},
+               if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
+                || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
+		   if ($env{'priv.'.$priv.'.lock.expire'}>time) {
+                       &log($env{'user.domain'},$env{'user.name'},
+                            $env{'user.home'},
                             'Locked by priv: '.$priv.' for '.$uri.' due to '.
                             $cdom.'/'.$cnum.'/'.$csec.' expire '.
-                            $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
+                            $env{$prefix.'priv.'.$priv.'.lock.expire'});
 		       return '';
                    }
                }
@@ -3005,7 +3456,7 @@ sub allowed {
 # Rest of the restrictions depend on selected course
 #
 
-    unless ($ENV{'request.course.id'}) {
+    unless ($env{'request.course.id'}) {
        return '1';
     }
 
@@ -3017,21 +3468,25 @@ sub allowed {
 # Course preferences
 
    if ($thisallowed=~/C/) {
-       my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
-       my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
-       if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
+       my $rolecode=(split(/\./,$env{'request.role'}))[0];
+       my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
+       if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
 	   =~/\Q$rolecode\E/) {
-           &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
-                'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
-                $ENV{'request.course.id'});
+	   if ($priv ne 'pch') { 
+	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
+			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
+			$env{'request.course.id'});
+	   }
            return '';
        }
 
-       if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
+       if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
 	   =~/\Q$unamedom\E/) {
-           &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
-                'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
-                $ENV{'request.course.id'});
+	   if ($priv ne 'pch') { 
+	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
+			'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
+			$env{'request.course.id'});
+	   }
            return '';
        }
    }
@@ -3039,20 +3494,22 @@ sub allowed {
 # Resource preferences
 
    if ($thisallowed=~/R/) {
-       my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
+       my $rolecode=(split(/\./,$env{'request.role'}))[0];
        if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
-	  &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
-                    'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
-          return '';
+	   if ($priv ne 'pch') { 
+	       &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
+			'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
+	   }
+	   return '';
        }
    }
 
 # Restricted by state or randomout?
 
    if ($thisallowed=~/X/) {
-      if ($ENV{'acc.randomout'}) {
-         my $symb=&symbread($uri,1);
-         if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) { 
+      if ($env{'acc.randomout'}) {
+	 if (!$symb) { $symb=&symbread($uri,1); }
+         if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) { 
             return ''; 
          }
       }
@@ -3066,18 +3523,19 @@ sub allowed {
    return 'F';
 }
 
+sub split_uri_for_cond {
+    my $uri=&deversion(&declutter(shift));
+    my @uriparts=split(/\//,$uri);
+    my $filename=pop(@uriparts);
+    my $pathname=join('/',@uriparts);
+    return ($pathname,$filename);
+}
 # --------------------------------------------------- Is a resource on the map?
 
 sub is_on_map {
-    my $uri=&declutter(shift);
-    $uri=~s/\.\d+\.(\w+)$/\.$1/;
-    my @uriparts=split(/\//,$uri);
-    my $filename=$uriparts[$#uriparts];
-    my $pathname=$uri;
-    $pathname=~s|/\Q$filename\E$||;
-    $pathname=~s/^adm\/wrapper\///;    
+    my ($pathname,$filename) = &split_uri_for_cond(shift);
     #Trying to find the conditional for the file
-    my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
+    my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
 	       /\&\Q$filename\E\:([\d\|]+)\&/);
     if ($match) {
 	return (1,$1);
@@ -3096,7 +3554,7 @@ sub get_symb_from_alias {
 # Must be an alias
     my $aliassymb='';
     my %bighash;
-    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+    if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {
         my $rid=$bighash{'mapalias_'.$symb};
 	if ($rid) {
@@ -3141,11 +3599,11 @@ sub definerole {
             }
         }
     }
-    my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
-                "$ENV{'user.domain'}:$ENV{'user.name'}:".
+    my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
+                "$env{'user.domain'}:$env{'user.name'}:".
 	        "rolesdef_$rolename=".
                 escape($sysrole.'_'.$domrole.'_'.$courole);
-    return reply($command,$ENV{'user.home'});
+    return reply($command,$env{'user.home'});
   } else {
     return 'refused';
   }
@@ -3207,7 +3665,7 @@ sub fetch_enrollment_query {
     $cmd =~ s/%%$//;
     $cmd = &escape($cmd);
     my $query = 'fetchenrollment';
-    my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
+    my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
     unless ($queryid=~/^\Q$host\E\_/) { 
         &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum); 
         return 'error: '.$queryid;
@@ -3219,7 +3677,7 @@ sub fetch_enrollment_query {
         $tries ++;
     }
     if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
-        &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
+        &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
     } else {
         my @responses = split/:/,$reply;
         if ($homeserver eq $perlvar{'lonHostID'}) {
@@ -3284,14 +3742,14 @@ sub courselog_query {
 # end: timestamp
 #
     my (%filters)=@_;
-    unless ($ENV{'request.course.id'}) { return 'no_course'; }
+    unless ($env{'request.course.id'}) { return 'no_course'; }
     if ($filters{'url'}) {
 	$filters{'url'}=&symbclean(&declutter($filters{'url'}));
         $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
         $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
     }
-    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
-    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
+    my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
+    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
     return &log_query($cname,$cdom,'courselog',%filters);
 }
 
@@ -3348,16 +3806,99 @@ sub auto_create_password {
     return ($authparam,$create_passwd,$authchk);
 }
 
+sub auto_photo_permission {
+    my ($cnum,$cdom,$students) = @_;
+    my $homeserver = &homeserver($cnum,$cdom);
+    my ($outcome,$perm_reqd,$conditions) = 
+	split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
+    if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
+	return (undef,undef);
+    }
+    return ($outcome,$perm_reqd,$conditions);
+}
+
+sub auto_checkphotos {
+    my ($uname,$udom,$pid) = @_;
+    my $homeserver = &homeserver($uname,$udom);
+    my ($result,$resulttype);
+    my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
+				   &escape($uname).':'.&escape($pid),
+				   $homeserver));
+    if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
+	return (undef,undef);
+    }
+    if ($outcome) {
+        ($result,$resulttype) = split(/:/,$outcome);
+    } 
+    return ($result,$resulttype);
+}
+
+sub auto_photochoice {
+    my ($cnum,$cdom) = @_;
+    my $homeserver = &homeserver($cnum,$cdom);
+    my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
+						       &escape($cdom),
+						       $homeserver)));
+    if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
+	return (undef,undef);
+    }
+    return ($update,$comment);
+}
+
+sub auto_photoupdate {
+    my ($affiliatesref,$dom,$cnum,$photo) = @_;
+    my $homeserver = &homeserver($cnum,$dom);
+    my $host=$hostname{$homeserver};
+    my $cmd = '';
+    my $maxtries = 1;
+    foreach (keys %{$affiliatesref}) {
+        $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
+    }
+    $cmd =~ s/%%$//;
+    $cmd = &escape($cmd);
+    my $query = 'institutionalphotos';
+    my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
+    unless ($queryid=~/^\Q$host\E\_/) {
+        &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
+        return 'error: '.$queryid;
+    }
+    my $reply = &get_query_reply($queryid);
+    my $tries = 1;
+    while (($reply=~/^timeout/) && ($tries < $maxtries)) {
+        $reply = &get_query_reply($queryid);
+        $tries ++;
+    }
+    if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
+        &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
+    } else {
+        my @responses = split(/:/,$reply);
+        my $outcome = shift(@responses); 
+        foreach my $item (@responses) {
+            my ($key,$value) = split(/=/,$item);
+            $$photo{$key} = $value;
+        }
+        return $outcome;
+    }
+    return 'error';
+}
+
 sub auto_instcode_format {
     my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
     my $courses = '';
     my $homeserver;
     if ($caller eq 'global') {
-        $homeserver = $perlvar{'lonHostID'};
+        foreach my $tryserver (keys %libserv) {
+            if ($hostdom{$tryserver} eq $codedom) {
+                $homeserver = $tryserver;
+                last;
+            }
+        }
+        if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
+            $homeserver = &homeserver($env{'user.name'},$codedom);
+        }
     } else {
         $homeserver = &homeserver($caller,$codedom);
     }
-    my $host=$hostname{$homeserver};
     foreach (keys %{$instcodes}) {
         $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
     }
@@ -3374,11 +3915,102 @@ sub auto_instcode_format {
     return $response;
 }
 
+# ------------------------------------------------------- Course Group routines
+
+sub get_coursegroups {
+    my ($cdom,$cnum,$group) = @_;
+    return(&dump('coursegroups',$cdom,$cnum,$group));
+}
+
+sub modify_coursegroup {
+    my ($cdom,$cnum,$groupsettings) = @_;
+    return(&put('coursegroups',$groupsettings,$cdom,$cnum));
+}
+
+sub modify_group_roles {
+    my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
+    my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
+    my $role = 'gr/'.&escape($userprivs);
+    my ($uname,$udom) = split(/:/,$user);
+    my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
+    if ($result eq 'ok') {
+        &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
+    }
+
+    return $result;
+}
+
+sub modify_coursegroup_membership {
+    my ($cdom,$cnum,$membership) = @_;
+    my $result = &put('groupmembership',$membership,$cdom,$cnum);
+    return $result;
+}
+
+sub get_active_groups {
+    my ($udom,$uname,$cdom,$cnum) = @_;
+    my $now = time;
+    my %groups = ();
+    foreach my $key (keys(%env)) {
+        if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
+            my ($start,$end) = split(/\./,$env{$key});
+            if (($end!=0) && ($end<$now)) { next; }
+            if (($start!=0) && ($start>$now)) { next; }
+            if ($1 eq $cdom && $2 eq $cnum) {
+                $groups{$3} = $env{$key} ;
+            }
+        }
+    }
+    return %groups;
+}
+
+sub get_group_membership {
+    my ($cdom,$cnum,$group) = @_;
+    return(&dump('groupmembership',$cdom,$cnum,$group));
+}
+
+sub get_users_groups {
+    my ($udom,$uname,$courseid) = @_;
+    my $cachetime=1800;
+    $courseid=~s/\_/\//g;
+    $courseid=~s/^(\w)/\/$1/;
+
+    my $hashid="$udom:$uname:$courseid";
+    my ($result,$cached)=&is_cached_new('getgroups',$hashid);
+    if (defined($cached)) { return $result; }
+
+    my %roleshash = &dump('roles',$udom,$uname,$courseid);
+    my ($tmp) = keys(%roleshash);
+    if ($tmp=~/^error:/) {
+        &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
+        return '';
+    } else {
+        my $grouplist;
+        foreach my $key (keys %roleshash) {
+            if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
+                unless ($roleshash{$key} =~ /_1_1$/) {   # deleted membership
+                    $grouplist .= $1.':';
+                }
+            }
+        }
+        $grouplist =~ s/:$//;
+        return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
+    }
+}
+
+sub devalidate_getgroups_cache {
+    my ($udom,$uname,$cdom,$cnum)=@_;
+    my $courseid = $cdom.'_'.$cnum;
+    $courseid=~s/\_/\//g;
+    $courseid=~s/^(\w)/\/$1/;
+    my $hashid="$udom:$uname:$courseid";
+    &devalidate_cache_new('getgroups',$hashid);
+}
+
 # ------------------------------------------------------------------ Plain Text
 
 sub plaintext {
     my $short=shift;
-    return &mt($prp{$short});
+    return &Apache::lonlocal::mt($prp{$short});
 }
 
 # ----------------------------------------------------------------- Assign Role
@@ -3392,22 +4024,32 @@ sub assignrole {
 	unless (&allowed('ccr',$cwosec)) {
            &logthis('Refused custom assignrole: '.
              $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
-		    $ENV{'user.name'}.' at '.$ENV{'user.domain'});
+		    $env{'user.name'}.' at '.$env{'user.domain'});
            return 'refused'; 
         }
         $mrole='cr';
+    } elsif ($role =~ /^gr\//) {
+        my $cwogrp=$url;
+        $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
+        unless (&allowed('mdg',$cwogrp)) {
+            &logthis('Refused group assignrole: '.
+              $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
+                    $env{'user.name'}.' at '.$env{'user.domain'});
+            return 'refused';
+        }
+        $mrole='gr';
     } else {
         my $cwosec=$url;
         $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
         unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) { 
            &logthis('Refused assignrole: '.
              $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
-		    $ENV{'user.name'}.' at '.$ENV{'user.domain'});
+		    $env{'user.name'}.' at '.$env{'user.domain'});
            return 'refused'; 
         }
         $mrole=$role;
     }
-    my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
+    my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
                 "$udom:$uname:$url".'_'."$mrole=$role";
     if ($end) { $command.='_'.$end; }
     if ($start) {
@@ -3421,9 +4063,9 @@ sub assignrole {
     if ($deleteflag) {
 	if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
 # modify command to delete the role
-           $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
+           $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
                 "$udom:$uname:$url".'_'."$mrole";
-	   &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom"); 
+	   &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom"); 
 # set start and finish to negative values for userrolelog
            $start=-1;
            $end=-1;
@@ -3433,7 +4075,7 @@ sub assignrole {
     my $answer=&reply($command,&homeserver($uname,$udom));
 # log new user role if status is ok
     if ($answer eq 'ok') {
-	&userrolelog($mrole,$uname,$udom,$url,$start,$end);
+	&userrolelog($role,$uname,$udom,$url,$start,$end);
     }
     return $answer;
 }
@@ -3446,16 +4088,16 @@ sub modifyuserauth {
     my $uhome=&homeserver($uname,$udom);
     unless (&allowed('mau',$udom)) { return 'refused'; }
     &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
-             $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
-             ' in domain '.$ENV{'request.role.domain'});  
+             $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
+             ' in domain '.$env{'request.role.domain'});  
     my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
 		     &escape($upass),$uhome);
-    &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
+    &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
         'Authentication changed for '.$udom.', '.$uname.', '.$umode.
          '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
     &log($udom,,$uname,$uhome,
-        'Authentication changed by '.$ENV{'user.domain'}.', '.
-                                     $ENV{'user.name'}.', '.$umode.
+        'Authentication changed by '.$env{'user.domain'}.', '.
+                                     $env{'user.name'}.', '.$umode.
          '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
     unless ($reply eq 'ok') {
         &logthis('Authentication mode error: '.$reply);
@@ -3478,8 +4120,8 @@ sub modifyuser {
 	     $last.', '.$gene.'(forceid: '.$forceid.')'.
              (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
                                      ' desiredhome not specified'). 
-             ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
-             ' in domain '.$ENV{'request.role.domain'});
+             ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
+             ' in domain '.$env{'request.role.domain'});
     my $uhome=&homeserver($uname,$udom,'true');
 # ----------------------------------------------------------------- Create User
     if (($uhome eq 'no_host') && 
@@ -3487,8 +4129,8 @@ sub modifyuser {
         my $unhome='';
         if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) { 
             $unhome = $desiredhome;
-	} elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
-	    $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
+	} elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
+	    $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
         } else { # load balancing routine for determining $unhome
             my $tryserver;
             my $loadm=10000000;
@@ -3548,15 +4190,19 @@ sub modifyuser {
     if (defined($middle)) { $names{'middlename'} = $middle; }
     if ($last)   { $names{'lastname'}   = $last; }
     if (defined($gene))   { $names{'generation'} = $gene; }
-    if ($email)  { $names{'notification'} = $email;
-                   $names{'critnotification'} = $email; }
-
+    if ($email) {
+       $email=~s/[^\w\@\.\-\,]//gs;
+       if ($email=~/\@/) { $names{'notification'} = $email;
+			   $names{'critnotification'} = $email;
+			   $names{'permanentemail'} = $email; }
+    }
     my $reply = &put('environment', \%names, $udom,$uname);
     if ($reply ne 'ok') { return 'error: '.$reply; }
+    &devalidate_cache_new('namescache',$uname.':'.$udom);
     &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
              $umode.', '.$first.', '.$middle.', '.
 	     $last.', '.$gene.' by '.
-             $ENV{'user.name'}.' at '.$ENV{'user.domain'});
+             $env{'user.name'}.' at '.$env{'user.domain'});
     return 'ok';
 }
 
@@ -3566,7 +4212,7 @@ sub modifystudent {
     my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
         $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
     if (!$cid) {
-	unless ($cid=$ENV{'request.course.id'}) {
+	unless ($cid=$env{'request.course.id'}) {
 	    return 'not_in_class';
 	}
     }
@@ -3587,15 +4233,15 @@ sub modify_student_enrollment {
     my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
     my ($cdom,$cnum,$chome);
     if (!$cid) {
-	unless ($cid=$ENV{'request.course.id'}) {
+	unless ($cid=$env{'request.course.id'}) {
 	    return 'not_in_class';
 	}
-	$cdom=$ENV{'course.'.$cid.'.domain'};
-	$cnum=$ENV{'course.'.$cid.'.num'};
+	$cdom=$env{'course.'.$cid.'.domain'};
+	$cnum=$env{'course.'.$cid.'.num'};
     } else {
 	($cdom,$cnum)=split(/_/,$cid);
     }
-    $chome=$ENV{'course.'.$cid.'.home'};
+    $chome=$env{'course.'.$cid.'.home'};
     if (!$chome) {
 	$chome=&homeserver($cnum,$cdom);
     }
@@ -3626,14 +4272,15 @@ sub modify_student_enrollment {
         $gene   = $tmp{'generation'} if (!defined($gene)   || $gene eq '');
         $uid    = $tmp{'id'}         if (!defined($uid)    || $uid  eq '');
     }
-    my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
-                                                           $first,$middle);
+    my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
     my $reply=cput('classlist',
 		   {"$uname:$udom" => 
 			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
 		   $cdom,$cnum);
     unless (($reply eq 'ok') || ($reply eq 'delayed')) {
 	return 'error: '.$reply;
+    } else {
+	&devalidate_getsection_cache($udom,$uname,$cid);
     }
     # Add student role to user
     my $uurl='/'.$cid;
@@ -3644,6 +4291,25 @@ sub modify_student_enrollment {
     return &assignrole($udom,$uname,$uurl,'st',$end,$start);
 }
 
+sub format_name {
+    my ($firstname,$middlename,$lastname,$generation,$first)=@_;
+    my $name;
+    if ($first ne 'lastname') {
+	$name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
+    } else {
+	if ($lastname=~/\S/) {
+	    $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
+	    $name=~s/\s+,/,/;
+	} else {
+	    $name.= $firstname.' '.$middlename.' '.$generation;
+	}
+    }
+    $name=~s/^\s+//;
+    $name=~s/\s+$//;
+    $name=~s/\s+/ /g;
+    return $name;
+}
+
 # ------------------------------------------------- Write to course preferences
 
 sub writecoursepref {
@@ -3666,14 +4332,16 @@ sub writecoursepref {
 # ---------------------------------------------------------- Make/modify course
 
 sub createcourse {
-    my ($udom,$description,$url,$course_server,$nonstandard,$inst_code)=@_;
+    my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
     $url=&declutter($url);
     my $cid='';
     unless (&allowed('ccc',$udom)) {
         return 'refused';
     }
 # ------------------------------------------------------------------- Create ID
-   my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
+   my $uname=int(1+rand(9)).
+       ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
+       substr($$.time,0,5).unpack("H8",pack("I32",time)).
        unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
 # ----------------------------------------------- Make sure that does not exist
    my $uhome=&homeserver($uname,$udom,'true');
@@ -3686,7 +4354,7 @@ sub createcourse {
        } 
    }
 # ------------------------------------------------ Check supplied server name
-    $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
+    $course_server = $env{'user.homeserver'} if (! defined($course_server));
     if (! exists($libserv{$course_server})) {
         return 'error:bad server name '.$course_server;
     }
@@ -3701,7 +4369,7 @@ sub createcourse {
 # ----------------------------------------------------------------- Course made
 # log existence
     &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
-                 '='.&escape($inst_code),$uhome);
+                 ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
     &flushcourselogs();
 # set toplevel url
     my $topurl=$url;
@@ -3709,7 +4377,7 @@ sub createcourse {
 # ------------------------------------------ For standard courses, make top url
         my $mapurl=&clutter($url);
         if ($mapurl eq '/res/') { $mapurl=''; }
-        $ENV{'form.initmap'}=(<<ENDINITMAP);
+        $env{'form.initmap'}=(<<ENDINITMAP);
 <map>
 <resource id="1" type="start"></resource>
 <resource id="2" src="$mapurl"></resource>
@@ -3719,7 +4387,7 @@ sub createcourse {
 </map>
 ENDINITMAP
         $topurl=&declutter(
-        &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
+        &finishuserfileupload($uname,$udom,'initmap','default.sequence')
                           );
     }
 # ----------------------------------------------------------- Write preferences
@@ -3762,6 +4430,191 @@ sub diskusage {
     return $listing;
 }
 
+sub is_locked {
+    my ($file_name, $domain, $user) = @_;
+    my @check;
+    my $is_locked;
+    push @check, $file_name;
+    my %locked = &get('file_permissions',\@check,
+		      $env{'user.domain'},$env{'user.name'});
+    my ($tmp)=keys(%locked);
+    if ($tmp=~/^error:/) { undef(%locked); }
+
+    if (ref($locked{$file_name}) eq 'ARRAY') {
+        $is_locked = 'true';
+    } else {
+        $is_locked = 'false';
+    }
+}
+
+# ------------------------------------------------------------- Mark as Read Only
+
+sub mark_as_readonly {
+    my ($domain,$user,$files,$what) = @_;
+    my %current_permissions = &dump('file_permissions',$domain,$user);
+    my ($tmp)=keys(%current_permissions);
+    if ($tmp=~/^error:/) { undef(%current_permissions); }
+    foreach my $file (@{$files}) {
+        push(@{$current_permissions{$file}},$what);
+    }
+    &put('file_permissions',\%current_permissions,$domain,$user);
+    return;
+}
+
+# ------------------------------------------------------------Save Selected Files
+
+sub save_selected_files {
+    my ($user, $path, @files) = @_;
+    my $filename = $user."savedfiles";
+    my @other_files = &files_not_in_path($user, $path);
+    open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
+    foreach my $file (@files) {
+        print (OUT $env{'form.currentpath'}.$file."\n");
+    }
+    foreach my $file (@other_files) {
+        print (OUT $file."\n");
+    }
+    close (OUT);
+    return 'ok';
+}
+
+sub clear_selected_files {
+    my ($user) = @_;
+    my $filename = $user."savedfiles";
+    open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
+    print (OUT undef);
+    close (OUT);
+    return ("ok");    
+}
+
+sub files_in_path {
+    my ($user, $path) = @_;
+    my $filename = $user."savedfiles";
+    my %return_files;
+    open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
+    while (my $line_in = <IN>) {
+        chomp ($line_in);
+        my @paths_and_file = split (m!/!, $line_in);
+        my $file_part = pop (@paths_and_file);
+        my $path_part = join ('/', @paths_and_file);
+        $path_part.='/';
+        my $path_and_file = $path_part.$file_part;
+        if ($path_part eq $path) {
+            $return_files{$file_part}= 'selected';
+        }
+    }
+    close (IN);
+    return (\%return_files);
+}
+
+# called in portfolio select mode, to show files selected NOT in current directory
+sub files_not_in_path {
+    my ($user, $path) = @_;
+    my $filename = $user."savedfiles";
+    my @return_files;
+    my $path_part;
+    open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
+    while (<IN>) {
+        #ok, I know it's clunky, but I want it to work
+        my @paths_and_file = split m!/!, $_;
+        my $file_part = pop (@paths_and_file);
+        chomp ($file_part);
+        my $path_part = join ('/', @paths_and_file);
+        $path_part .= '/';
+        my $path_and_file = $path_part.$file_part;
+        if ($path_part ne $path) {
+            push (@return_files, ($path_and_file));
+        }
+    }
+    close (OUT);
+    return (@return_files);
+}
+
+#--------------------------------------------------------------Get Marked as Read Only
+
+
+sub get_marked_as_readonly {
+    my ($domain,$user,$what) = @_;
+    my %current_permissions = &dump('file_permissions',$domain,$user);
+    my ($tmp)=keys(%current_permissions);
+    if ($tmp=~/^error:/) { undef(%current_permissions); }
+    my @readonly_files;
+    my $cmp1=$what;
+    if (ref($what)) { $cmp1=join('',@{$what}) };
+    while (my ($file_name,$value) = each(%current_permissions)) {
+        if (ref($value) eq "ARRAY"){
+            foreach my $stored_what (@{$value}) {
+                my $cmp2=$stored_what;
+                if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
+                if ($cmp1 eq $cmp2) {
+                    push(@readonly_files, $file_name);
+                } elsif (!defined($what)) {
+                    push(@readonly_files, $file_name);
+                }
+            }
+        } 
+    }
+    return @readonly_files;
+}
+#-----------------------------------------------------------Get Marked as Read Only Hash
+
+sub get_marked_as_readonly_hash {
+    my ($domain,$user,$what) = @_;
+    my %current_permissions = &dump('file_permissions',$domain,$user);
+    my ($tmp)=keys(%current_permissions);
+    if ($tmp=~/^error:/) { undef(%current_permissions); }
+
+    my %readonly_files;
+    while (my ($file_name,$value) = each(%current_permissions)) {
+        if (ref($value) eq "ARRAY"){
+            foreach my $stored_what (@{$value}) {
+                if ($stored_what eq $what) {
+                    $readonly_files{$file_name} = 'locked';
+                } elsif (!defined($what)) {
+                    $readonly_files{$file_name} = 'locked';
+                }
+            }
+        } 
+    }
+    return %readonly_files;
+}
+# ------------------------------------------------------------ Unmark as Read Only
+
+sub unmark_as_readonly {
+    # unmarks $file_name (if $file_name is defined), or all files locked by $what 
+    # for portfolio submissions, $what contains [$symb,$crsid] 
+    my ($domain,$user,$what,$file_name) = @_;
+    my $symb_crs = $what;
+    if (ref($what)) { $symb_crs=join('',@$what); }
+    my %current_permissions = &dump('file_permissions',$domain,$user);
+    my ($tmp)=keys(%current_permissions);
+    if ($tmp=~/^error:/) { undef(%current_permissions); }
+    my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
+    foreach my $file (@readonly_files) {
+	if (defined($file_name) && ($file_name ne $file)) { next; }
+	my $current_locks = $current_permissions{$file};
+        my @new_locks;
+        my @del_keys;
+        if (ref($current_locks) eq "ARRAY"){
+            foreach my $locker (@{$current_locks}) {
+                my $compare=$locker;
+                if (ref($locker)) { $compare=join('',@{$locker}) };
+                if ($compare ne $symb_crs) {
+                    push(@new_locks, $locker);
+                }
+            }
+            if (scalar(@new_locks) > 0) {
+                $current_permissions{$file} = \@new_locks;
+            } else {
+                push(@del_keys, $file);
+                &del('file_permissions',\@del_keys, $domain, $user);
+                delete($current_permissions{$file});
+            }
+        }
+    }
+    &put('file_permissions',\%current_permissions,$domain,$user);
+    return;
+}
 
 # ------------------------------------------------------------ Directory lister
 
@@ -3787,19 +4640,37 @@ sub dirlist {
 
     if($udom) {
         if($uname) {
-            my $listing=reply('ls:'.$dirRoot.'/'.$uri,
+            my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
                               homeserver($uname,$udom));
-            return split(/:/,$listing);
+            my @listing_results;
+            if ($listing eq 'unknown_cmd') {
+                $listing=reply('ls:'.$dirRoot.'/'.$uri,
+                               homeserver($uname,$udom));
+                @listing_results = split(/:/,$listing);
+            } else {
+                @listing_results = map { &unescape($_); } split(/:/,$listing);
+            }
+            return @listing_results;
         } elsif(!defined($alternateDirectoryRoot)) {
             my $tryserver;
             my %allusers=();
             foreach $tryserver (keys %libserv) {
                 if($hostdom{$tryserver} eq $udom) {
-                    my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
+                    my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
                                       $udom, $tryserver);
-                    if (($listing ne 'no_such_dir') && ($listing ne 'empty')
-                        && ($listing ne 'con_lost')) {
-                        foreach (split(/:/,$listing)) {
+                    my @listing_results;
+                    if ($listing eq 'unknown_cmd') {
+                        $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
+                                       $udom, $tryserver);
+                        @listing_results = split(/:/,$listing);
+                    } else {
+                        @listing_results =
+                            map { &unescape($_); } split(/:/,$listing);
+                    }
+                    if ($listing_results[0] ne 'no_such_dir' && 
+                        $listing_results[0] ne 'empty'       &&
+                        $listing_results[0] ne 'con_lost') {
+                        foreach (@listing_results) {
                             my ($entry,@stat)=split(/&/,$_);
                             $allusers{$entry}=1;
                         }
@@ -3867,54 +4738,119 @@ sub GetFileTimestamp {
     }
 }
 
+sub stat_file {
+    my ($uri) = @_;
+    $uri = &clutter($uri);
+
+    # we want just the url part without the unneeded accessor url bits
+    if ($uri =~ m-^/adm/-) {
+	$uri=~s-^/adm/wrapper/-/-;
+	$uri=~s-^/adm/coursedocs/showdoc/-/-;
+    }
+    my ($udom,$uname,$file,$dir);
+    if ($uri =~ m-^/(uploaded|editupload)/-) {
+	($udom,$uname,$file) =
+	    ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
+	$file = 'userfiles/'.$file;
+	$dir = &Apache::loncommon::propath($udom,$uname);
+    }
+    if ($uri =~ m-^/res/-) {
+	($udom,$uname) = 
+	    ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
+	$file = $uri;
+    }
+
+    if (!$udom || !$uname || !$file) {
+	# unable to handle the uri
+	return ();
+    }
+
+    my ($result) = &dirlist($file,$udom,$uname,$dir);
+    my @stats = split('&', $result);
+    
+    if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
+	shift(@stats); #filename is first
+	return @stats;
+    }
+    return ();
+}
+
 # -------------------------------------------------------- Value of a Condition
 
+# gets the value of a specific preevaluated condition
+#    stored in the string  $env{user.state.<cid>}
+# or looks up a condition reference in the bighash and if if hasn't
+# already been evaluated recurses into docondval to get the value of
+# the condition, then memoizing it to 
+#   $env{user.state.<cid>.<condition>}
 sub directcondval {
     my $number=shift;
-    if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
-       return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
+    if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
+	&Apache::lonuserstate::evalstate();
+    }
+    if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
+	return $env{'user.state.'.$env{'request.course.id'}.".$number"};
+    } elsif ($number =~ /^_/) {
+	my $sub_condition;
+	if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
+		&GDBM_READER(),0640)) {
+	    $sub_condition=$bighash{'conditions'.$number};
+	    untie(%bighash);
+	}
+	my $value = &docondval($sub_condition);
+	&appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
+	return $value;
+    }
+    if ($env{'user.state.'.$env{'request.course.id'}}) {
+       return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
     } else {
        return 2;
     }
 }
 
+# get the collection of conditions for this resource
 sub condval {
     my $condidx=shift;
-    my $result=0;
     my $allpathcond='';
-    foreach (split(/\|/,$condidx)) {
-       if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
-	   $allpathcond.=
-               '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
-       }
+    foreach my $cond (split(/\|/,$condidx)) {
+	if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
+	    $allpathcond.=
+		'('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
+	}
     }
     $allpathcond=~s/\|$//;
-    if ($ENV{'request.course.id'}) {
-       if ($allpathcond) {
-          my $operand='|';
-	  my @stack;
-           foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
-              if ($_ eq '(') {
-                 push @stack,($operand,$result)
-              } elsif ($_ eq ')') {
-                  my $before=pop @stack;
-		  if (pop @stack eq '&') {
-		      $result=$result>$before?$before:$result;
-                  } else {
-                      $result=$result>$before?$result:$before;
-                  }
-              } elsif (($_ eq '&') || ($_ eq '|')) {
-                  $operand=$_;
-              } else {
-                  my $new=directcondval($_);
-                  if ($operand eq '&') {
-                     $result=$result>$new?$new:$result;
-                  } else {
-                     $result=$result>$new?$result:$new;
-                  }
-              }
-          }
-       }
+    return &docondval($allpathcond);
+}
+
+#evaluates an expression of conditions
+sub docondval {
+    my ($allpathcond) = @_;
+    my $result=0;
+    if ($env{'request.course.id'}
+	&& defined($allpathcond)) {
+	my $operand='|';
+	my @stack;
+	foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
+	    if ($chunk eq '(') {
+		push @stack,($operand,$result);
+	    } elsif ($chunk eq ')') {
+		my $before=pop @stack;
+		if (pop @stack eq '&') {
+		    $result=$result>$before?$before:$result;
+		} else {
+		    $result=$result>$before?$result:$before;
+		}
+	    } elsif (($chunk eq '&') || ($chunk eq '|')) {
+		$operand=$chunk;
+	    } else {
+		my $new=directcondval($chunk);
+		if ($operand eq '&') {
+		    $result=$result>$new?$new:$result;
+		} else {
+		    $result=$result>$new?$result:$new;
+		}
+	    }
+	}
     }
     return $result;
 }
@@ -3924,29 +4860,78 @@ sub condval {
 sub devalidatecourseresdata {
     my ($coursenum,$coursedomain)=@_;
     my $hashid=$coursenum.':'.$coursedomain;
-    &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
+    &devalidate_cache_new('courseres',$hashid);
 }
 
 # --------------------------------------------------- Course Resourcedata Query
 
-sub courseresdata {
-    my ($coursenum,$coursedomain,@which)=@_;
+sub get_courseresdata {
+    my ($coursenum,$coursedomain)=@_;
     my $coursehom=&homeserver($coursenum,$coursedomain);
     my $hashid=$coursenum.':'.$coursedomain;
-    my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
+    my ($result,$cached)=&is_cached_new('courseres',$hashid);
+    my %dumpreply;
     unless (defined($cached)) {
-	my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
+	%dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
 	$result=\%dumpreply;
 	my ($tmp) = keys(%dumpreply);
 	if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-	    &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
+	    &do_cache_new('courseres',$hashid,$result,600);
 	} elsif ($tmp =~ /^(con_lost|no_such_host)/) {
 	    return $tmp;
 	} elsif ($tmp =~ /^(error)/) {
 	    $result=undef;
-	    &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
+	    &do_cache_new('courseres',$hashid,$result,600);
 	}
     }
+    return $result;
+}
+
+sub devalidateuserresdata {
+    my ($uname,$udom)=@_;
+    my $hashid="$udom:$uname";
+    &devalidate_cache_new('userres',$hashid);
+}
+
+sub get_userresdata {
+    my ($uname,$udom)=@_;
+    #most student don\'t have any data set, check if there is some data
+    if (&EXT_cache_status($udom,$uname)) { return undef; }
+
+    my $hashid="$udom:$uname";
+    my ($result,$cached)=&is_cached_new('userres',$hashid);
+    if (!defined($cached)) {
+	my %resourcedata=&dump('resourcedata',$udom,$uname);
+	$result=\%resourcedata;
+	&do_cache_new('userres',$hashid,$result,600);
+    }
+    my ($tmp)=keys(%$result);
+    if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
+	return $result;
+    }
+    #error 2 occurs when the .db doesn't exist
+    if ($tmp!~/error: 2 /) {
+	&logthis("<font color=\"blue\">WARNING:".
+		 " Trying to get resource data for ".
+		 $uname." at ".$udom.": ".
+		 $tmp."</font>");
+    } elsif ($tmp=~/error: 2 /) {
+	#&EXT_cache_set($udom,$uname);
+	&do_cache_new('userres',$hashid,undef,600);
+	undef($tmp); # not really an error so don't send it back
+    }
+    return $tmp;
+}
+
+sub resdata {
+    my ($name,$domain,$type,@which)=@_;
+    my $result;
+    if ($type eq 'course') {
+	$result=&get_courseresdata($name,$domain);
+    } elsif ($type eq 'user') {
+	$result=&get_userresdata($name,$domain);
+    }
+    if (!ref($result)) { return $result; }    
     foreach my $item (@which) {
 	if (defined($result->{$item})) {
 	    return $result->{$item};
@@ -3966,7 +4951,7 @@ sub clear_EXT_cache_status {
 sub EXT_cache_status {
     my ($target_domain,$target_user) = @_;
     my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
-    if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
+    if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
         # We know already the user has no data
         return 1;
     } else {
@@ -3977,13 +4962,13 @@ sub EXT_cache_status {
 sub EXT_cache_set {
     my ($target_domain,$target_user) = @_;
     my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
-    &appenv($cachename => time);
+    #&appenv($cachename => time);
 }
 
 # --------------------------------------------------------- Value of a Variable
 sub EXT {
-    my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
 
+    my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
     unless ($varname) { return ''; }
     #get real user name/domain, courseid and symb
     my $courseid;
@@ -3996,7 +4981,7 @@ sub EXT {
 	  &Apache::lonxml::whichuser($symbparm);
       if (!$symbparm) {	$symbparm=$cursymb; }
     } else {
-	$courseid=$ENV{'request.course.id'};
+	$courseid=$env{'request.course.id'};
     }
     my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
     my $rest;
@@ -4013,11 +4998,14 @@ sub EXT {
     if ($realm eq 'user') {
 # --------------------------------------------------------------- user.resource
 	if ($space eq 'resource') {
-	    if (defined($Apache::lonhomework::parsing_a_problem)) {
+	    if ( (defined($Apache::lonhomework::parsing_a_problem)
+		  || defined($Apache::lonhomework::parsing_a_task))
+		 &&
+		 ($symbparm eq &symbread()) ) {
 		return $Apache::lonhomework::history{$qualifierrest};
 	    } else {
 		my %restored;
-		if ($publicuser || $ENV{'request.state'} eq 'construct') {
+		if ($publicuser || $env{'request.state'} eq 'construct') {
 		    %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
 		} else {
 		    %restored=&restore($symbparm,$courseid,$udom,$uname);
@@ -4030,9 +5018,9 @@ sub EXT {
             return &allowed($qualifier,$rest);
 # ------------------------------------------ user.preferences, user.environment
         } elsif (($space eq 'preferences') || ($space eq 'environment')) {
-	    if (($uname eq $ENV{'user.name'}) &&
-		($udom eq $ENV{'user.domain'})) {
-		return $ENV{join('.',('environment',$qualifierrest))};
+	    if (($uname eq $env{'user.name'}) &&
+		($udom eq $env{'user.domain'})) {
+		return $env{join('.',('environment',$qualifierrest))};
 	    } else {
 		my %returnhash;
 		if (!$publicuser) {
@@ -4044,11 +5032,11 @@ sub EXT {
 # ----------------------------------------------------------------- user.course
         } elsif ($space eq 'course') {
 	    # FIXME - not supporting calls for a specific user
-            return $ENV{join('.',('request.course',$qualifier))};
+            return $env{join('.',('request.course',$qualifier))};
 # ------------------------------------------------------------------- user.role
         } elsif ($space eq 'role') {
 	    # FIXME - not supporting calls for a specific user
-            my ($role,$where)=split(/\./,$ENV{'request.role'});
+            my ($role,$where)=split(/\./,$env{'request.role'});
             if ($qualifier eq 'value') {
 		return $role;
             } elsif ($qualifier eq 'extent') {
@@ -4072,34 +5060,46 @@ sub EXT {
 # ---------------------------------------------- pull stuff out of query string
         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 						[$spacequalifierrest]);
-	return $ENV{'form.'.$spacequalifierrest}; 
+	return $env{'form.'.$spacequalifierrest}; 
    } elsif ($realm eq 'request') {
 # ------------------------------------------------------------- request.browser
         if ($space eq 'browser') {
 	    if ($qualifier eq 'textremote') {
-		if (&mt('textual_remote_display') eq 'on') {
+		if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
 		    return 1;
 		} else {
 		    return 0;
 		}
 	    } else {
-		return $ENV{'browser.'.$qualifier};
+		return $env{'browser.'.$qualifier};
 	    }
 # ------------------------------------------------------------ request.filename
         } else {
-            return $ENV{'request.'.$spacequalifierrest};
+            return $env{'request.'.$spacequalifierrest};
         }
     } elsif ($realm eq 'course') {
 # ---------------------------------------------------------- course.description
-        return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
+        return $env{'course.'.$courseid.'.'.$spacequalifierrest};
     } elsif ($realm eq 'resource') {
 
-	my $section;
-	if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
+	if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
 	    if (!$symbparm) { $symbparm=&symbread(); }
 	}
+
+	if ($space eq 'title') {
+	    if (!$symbparm) { $symbparm = $env{'request.filename'}; }
+	    return &gettitle($symbparm);
+	}
+	
+	if ($space eq 'map') {
+	    my ($map) = &decode_symb($symbparm);
+	    return &symbread($map);
+	}
+
+	my ($section, $group, @groups);
+	my ($courselevelm,$courselevel);
 	if ($symbparm && defined($courseid) && 
-	    $courseid eq $ENV{'request.course.id'}) {
+	    $courseid eq $env{'request.course.id'}) {
 
 	    #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
 
@@ -4110,80 +5110,67 @@ sub EXT {
 	    my $symbparm=$symbp.'.'.$spacequalifierrest;
 	    my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
 
-	    if (($ENV{'user.name'} eq $uname) &&
-		($ENV{'user.domain'} eq $udom)) {
-		$section=$ENV{'request.course.sec'};
+	    if (($env{'user.name'} eq $uname) &&
+		($env{'user.domain'} eq $udom)) {
+		$section=$env{'request.course.sec'};
+                @groups=&sort_course_groups($env{'request.course.groups'},$courseid); 
+                if (@groups > 0) {
+                    @groups = sort(@groups);
+                }
 	    } else {
 		if (! defined($usection)) {
 		    $section=&getsection($udom,$uname,$courseid);
 		} else {
 		    $section = $usection;
 		}
+                my $grouplist = &get_users_groups($udom,$uname,$courseid);
+                if ($grouplist) {
+                    @groups=&sort_course_groups($grouplist,$courseid);
+                }
 	    }
 
 	    my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
 	    my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
 	    my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
 
-	    my $courselevel=$courseid.'.'.$spacequalifierrest;
+	    $courselevel=$courseid.'.'.$spacequalifierrest;
 	    my $courselevelr=$courseid.'.'.$symbparm;
-	    my $courselevelm=$courseid.'.'.$mapparm;
+	    $courselevelm=$courseid.'.'.$mapparm;
 
 # ----------------------------------------------------------- first, check user
-	    #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,
-						'userres');
-		if (!defined($cached)) {
-		    my %resourcedata=&dump('resourcedata',$udom,$uname);
-		    $result=\%resourcedata;
-		    &do_cache(\%userresdatacache,$hashid,$result,'userres');
-		}
-		my ($tmp)=keys(%$result);
-		if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
-		    if ($$result{$courselevelr}) {
-			return $$result{$courselevelr}; }
-		    if ($$result{$courselevelm}) {
-			return $$result{$courselevelm}; }
-		    if ($$result{$courselevel}) {
-			return $$result{$courselevel}; }
-		} else {
-		    #error 2 occurs when the .db doesn't exist
-		    if ($tmp!~/error: 2 /) {
-			&logthis("<font color=blue>WARNING:".
-				 " Trying to get resource data for ".
-				 $uname." at ".$udom.": ".
-				 $tmp."</font>");
-		    } elsif ($tmp=~/error: 2 /) {
-			&EXT_cache_set($udom,$uname);
-		    } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
-			return $tmp;
-		    }
-		}
-	    }
 
-# -------------------------------------------------------- second, check course
+	    my $userreply=&resdata($uname,$udom,'user',
+				       ($courselevelr,$courselevelm,
+					$courselevel));
+	    if (defined($userreply)) { return $userreply; }
+
+# ------------------------------------------------ second, check some of course
+            my $coursereply;
+            if (@groups > 0) {
+                $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
+                                       $mapparm,$spacequalifierrest);
+                if (defined($coursereply)) { return $coursereply; }
+            }
 
-	    my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
-					   $ENV{'course.'.$courseid.'.domain'},
-					   ($seclevelr,$seclevelm,$seclevel,
-					    $courselevelr,$courselevelm,
-					    $courselevel));
+	    $coursereply=&resdata($env{'course.'.$courseid.'.num'},
+				     $env{'course.'.$courseid.'.domain'},
+				     'course',
+				     ($seclevelr,$seclevelm,$seclevel,
+				      $courselevelr));
 	    if (defined($coursereply)) { return $coursereply; }
 
 # ------------------------------------------------------ third, check map parms
 	    my %parmhash=();
 	    my $thisparm='';
 	    if (tie(%parmhash,'GDBM_File',
-		    $ENV{'request.course.fn'}.'_parms.db',
+		    $env{'request.course.fn'}.'_parms.db',
 		    &GDBM_READER(),0640)) {
 		$thisparm=$parmhash{$symbparm};
 		untie(%parmhash);
 	    }
 	    if ($thisparm) { return $thisparm; }
 	}
-# --------------------------------------------- last, look in resource metadata
+# ------------------------------------------ fourth, look in resource metadata
 
 	$spacequalifierrest=~s/\./\_/;
 	my $filename;
@@ -4191,13 +5178,22 @@ sub EXT {
 	if ($symbparm) {
 	    $filename=(&decode_symb($symbparm))[2];
 	} else {
-	    $filename=$ENV{'request.filename'};
+	    $filename=$env{'request.filename'};
 	}
 	my $metadata=&metadata($filename,$spacequalifierrest);
 	if (defined($metadata)) { return $metadata; }
 	$metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
 	if (defined($metadata)) { return $metadata; }
 
+# ---------------------------------------------- fourth, look in rest pf course
+	if ($symbparm && defined($courseid) && 
+	    $courseid eq $env{'request.course.id'}) {
+	    my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
+				     $env{'course.'.$courseid.'.domain'},
+				     'course',
+				     ($courselevelm,$courselevel));
+	    if (defined($coursereply)) { return $coursereply; }
+	}
 # ------------------------------------------------------------------ Cascade up
 	unless ($space eq '0') {
 	    my @parts=split(/_/,$space);
@@ -4215,8 +5211,8 @@ sub EXT {
 # ---------------------------------------------------- Any other user namespace
     } elsif ($realm eq 'environment') {
 # ----------------------------------------------------------------- environment
-	if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
-	    return $ENV{'environment.'.$spacequalifierrest};
+	if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
+	    return $env{'environment.'.$spacequalifierrest};
 	} else {
 	    my %returnhash=&userenvironment($udom,$uname,
 					    $spacequalifierrest);
@@ -4227,10 +5223,38 @@ sub EXT {
 	if ($space eq 'time') {
 	    return time;
         }
+    } elsif ($realm eq 'server') {
+# ----------------------------------------------------------------- system.time
+	if ($space eq 'name') {
+	    return $ENV{'SERVER_NAME'};
+        }
     }
     return '';
 }
 
+sub check_group_parms {
+    my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
+    my @groupitems = ();
+    my $resultitem;
+    my @levels = ($symbparm,$mapparm,$what);
+    foreach my $group (@{$groups}) {
+        foreach my $level (@levels) {
+             my $item = $courseid.'.['.$group.'].'.$level;
+             push(@groupitems,$item);
+        }
+    }
+    my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
+                            $env{'course.'.$courseid.'.domain'},
+                                     'course',@groupitems);
+    return $coursereply;
+}
+
+sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
+    my ($grouplist,$courseid) = @_;
+    my @groups = sort(split(/:/,$grouplist));
+    return @groups;
+}
+
 sub packages_tab_default {
     my ($uri,$varname)=@_;
     my (undef,$part,$name)=split(/\./,$varname);
@@ -4240,6 +5264,7 @@ sub packages_tab_default {
 	if (defined($packagetab{"$pack_type&$name&default"})) {
 	    return $packagetab{"$pack_type&$name&default"};
 	}
+	if ($pack_type eq 'part') { $pack_part='0'; }
 	if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
 	    return $packagetab{$pack_type."_".$pack_part."&$name&default"};
 	}
@@ -4265,6 +5290,7 @@ sub add_prefix_and_part {
 
 # ---------------------------------------------------------------- Get metadata
 
+my %metaentry;
 sub metadata {
     my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
     $uri=&declutter($uri);
@@ -4284,28 +5310,29 @@ sub metadata {
 # Everything is cached by the main uri, libraries are never directly cached
 #
     if (!defined($liburi)) {
-	my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
+	my ($result,$cached)=&is_cached_new('meta',$uri);
 	if (defined($cached)) { return $result->{':'.$what}; }
     }
     {
 #
 # Is this a recursive call for a library?
 #
-	if (! exists($metacache{$uri})) {
-	    $metacache{$uri}={};
-	}
+#	if (! exists($metacache{$uri})) {
+#	    $metacache{$uri}={};
+#	}
         if ($liburi) {
 	    $liburi=&declutter($liburi);
             $filename=$liburi;
         } else {
-	    &devalidate_cache(\%metacache,$uri,'meta');
+	    &devalidate_cache_new('meta',$uri);
+	    undef(%metaentry);
 	}
         my %metathesekeys=();
         unless ($filename=~/\.meta$/) { $filename.='.meta'; }
 	my $metastring;
-	if ($uri !~ m|^uploaded/|) {
+	if ($uri !~ m -^(uploaded|editupload)/-) {
 	    my $file=&filelocation('',&clutter($filename));
-	    push(@{$metacache{$uri.'.file'}},$file);
+	    #push(@{$metaentry{$uri.'.file'}},$file);
 	    $metastring=&getfile($file);
 	}
         my $parser=HTML::LCParser->new(\$metastring);
@@ -4322,12 +5349,12 @@ sub metadata {
 		    if (defined($token->[2]->{'id'})) { 
 			$keyroot.='_'.$token->[2]->{'id'}; 
 		    }
-		    if ($metacache{$uri}->{':packages'}) {
-			$metacache{$uri}->{':packages'}.=','.$package.$keyroot;
+		    if ($metaentry{':packages'}) {
+			$metaentry{':packages'}.=','.$package.$keyroot;
 		    } else {
-			$metacache{$uri}->{':packages'}=$package.$keyroot;
+			$metaentry{':packages'}=$package.$keyroot;
 		    }
-		    foreach (keys %packagetab) {
+		    foreach (sort keys %packagetab) {
 			my $part=$keyroot;
 			$part=~s/^\_//;
 			if ($_=~/^\Q$package\E\&/ || 
@@ -4347,14 +5374,14 @@ sub metadata {
 			    if ($subp eq 'display') {
 				$value.=' [Part: '.$part.']';
 			    }
-			    $metacache{$uri}->{':'.$unikey.'.part'}=$part;
+			    $metaentry{':'.$unikey.'.part'}=$part;
 			    $metathesekeys{$unikey}=1;
-			    unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
-				$metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
+			    unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
+				$metaentry{':'.$unikey.'.'.$subp}=$value;
 			    }
-			    if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
-				$metacache{$uri}->{':'.$unikey}=
-				    $metacache{$uri}->{':'.$unikey.'.default'};
+			    if (defined($metaentry{':'.$unikey.'.default'})) {
+				$metaentry{':'.$unikey}=
+				    $metaentry{':'.$unikey.'.default'};
 			    }
 			}
 		    }
@@ -4387,7 +5414,7 @@ sub metadata {
 			    foreach (sort(split(/\,/,&metadata($uri,'keys',
 							       $location,$unikey,
 							       $depthcount+1)))) {
-				$metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
+				$metaentry{':'.$_}=$metaentry{':'.$_};
 				$metathesekeys{$_}=1;
 			    }
 			}
@@ -4398,18 +5425,18 @@ sub metadata {
 			}
 			$metathesekeys{$unikey}=1;
 			foreach (@{$token->[3]}) {
-			    $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
+			    $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
 			}
 			my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
-			my $default=$metacache{$uri}->{':'.$unikey.'.default'};
+			my $default=$metaentry{':'.$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;
+			    $metaentry{':'.$unikey}=$default;
 			} else {
 		  # either something interesting inside the tag or default
                   # uninteresting
-			    $metacache{$uri}->{':'.$unikey}=$internaltext;
+			    $metaentry{':'.$unikey}=$internaltext;
 			}
 # end of not-a-package not-a-library import
 		    }
@@ -4420,13 +5447,12 @@ sub metadata {
 	}
 	my ($extension) = ($uri =~ /\.(\w+)$/);
 	foreach my $key (sort(keys(%packagetab))) {
-	    #&logthis("extsion1 $extension $key !!");
 	    #no specific packages #how's our extension
 	    if ($key!~/^extension_\Q$extension\E&/) { next; }
 	    &metadata_create_package_def($uri,$key,'extension_'.$extension,
 					 \%metathesekeys);
 	}
-	if (!exists($metacache{$uri}->{':packages'})) {
+	if (!exists($metaentry{':packages'})) {
 	    foreach my $key (sort(keys(%packagetab))) {
 		#no specific packages well let's get default then
 		if ($key!~/^default&/) { next; }
@@ -4435,31 +5461,31 @@ sub metadata {
 	    }
 	}
 # are there custom rights to evaluate
-	if ($metacache{$uri}->{':copyright'} eq 'custom') {
+	if ($metaentry{':copyright'} eq 'custom') {
 
     #
     # Importing a rights file here
     #
 	    unless ($depthcount) {
-		my $location=$metacache{$uri}->{':customdistributionfile'};
+		my $location=$metaentry{':customdistributionfile'};
 		my $dir=$filename;
 		$dir=~s|[^/]*$||;
 		$location=&filelocation($dir,$location);
 		foreach (sort(split(/\,/,&metadata($uri,'keys',
 						   $location,'_rights',
 						   $depthcount+1)))) {
-		    $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
+		    #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
 		    $metathesekeys{$_}=1;
 		}
 	    }
 	}
-	$metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
-	&metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
-	$metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
-	&do_cache(\%metacache,$uri,$metacache{$uri},'meta');
+	$metaentry{':keys'}=join(',',keys %metathesekeys);
+	&metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
+	$metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
+	&do_cache_new('meta',$uri,\%metaentry,60*60);
 # this is the end of "was not already recently cached
     }
-    return $metacache{$uri}->{':'.$what};
+    return $metaentry{':'.$what};
 }
 
 sub metadata_create_package_def {
@@ -4467,22 +5493,22 @@ sub metadata_create_package_def {
     my ($pack,$name,$subp)=split(/\&/,$key);
     if ($subp eq 'default') { next; }
     
-    if (defined($metacache{$uri}->{':packages'})) {
-	$metacache{$uri}->{':packages'}.=','.$package;
+    if (defined($metaentry{':packages'})) {
+	$metaentry{':packages'}.=','.$package;
     } else {
-	$metacache{$uri}->{':packages'}=$package;
+	$metaentry{':packages'}=$package;
     }
     my $value=$packagetab{$key};
     my $unikey;
     $unikey='parameter_0_'.$name;
-    $metacache{$uri}->{':'.$unikey.'.part'}=0;
+    $metaentry{':'.$unikey.'.part'}=0;
     $$metathesekeys{$unikey}=1;
-    unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
-	$metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
+    unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
+	$metaentry{':'.$unikey.'.'.$subp}=$value;
     }
-    if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
-	$metacache{$uri}->{':'.$unikey}=
-	    $metacache{$uri}->{':'.$unikey.'.default'};
+    if (defined($metaentry{':'.$unikey.'.default'})) {
+	$metaentry{':'.$unikey}=
+	    $metaentry{':'.$unikey.'.default'};
     }
 }
 
@@ -4508,7 +5534,7 @@ sub metadata_generate_part0 {
 					   '.type'};
       my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
 			     '.display'};
-      my $expr='\\[Part: '.$allnames{$name}.'\\]';
+      my $expr='[Part: '.$allnames{$name}.']';
       $olddis=~s/\Q$expr\E/\[Part: 0\]/;
       $$metacache{"$key.display"}=$olddis;
     }
@@ -4520,12 +5546,15 @@ sub gettitle {
     my $urlsymb=shift;
     my $symb=&symbread($urlsymb);
     if ($symb) {
-	my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
-	if (defined($cached)) { return $result; }
+	my $key=$env{'request.course.id'}."\0".$symb;
+	my ($result,$cached)=&is_cached_new('title',$key);
+	if (defined($cached)) { 
+	    return $result;
+	}
 	my ($map,$resid,$url)=&decode_symb($symb);
 	my $title='';
 	my %bighash;
-	if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+	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};
@@ -4533,7 +5562,7 @@ sub gettitle {
 	}
 	$title=~s/\&colon\;/\:/gs;
 	if ($title) {
-	    return &do_cache(\%titlecache,$symb,$title,'title');
+	    return &do_cache_new('title',$key,$title,600);
 	}
 	$urlsymb=$url;
     }
@@ -4541,18 +5570,45 @@ sub gettitle {
     if (!$title) { $title=(split('/',$urlsymb))[-1]; }    
     return $title;
 }
-    
+
+sub get_slot {
+    my ($which,$cnum,$cdom)=@_;
+    if (!$cnum || !$cdom) {
+	(undef,my $courseid)=&Apache::lonxml::whichuser();
+	$cdom=$env{'course.'.$courseid.'.domain'};
+	$cnum=$env{'course.'.$courseid.'.num'};
+    }
+    my $key=join("\0",'slots',$cdom,$cnum,$which);
+    my %slotinfo;
+    if (exists($remembered{$key})) {
+	$slotinfo{$which} = $remembered{$key};
+    } else {
+	%slotinfo=&get('slots',[$which],$cdom,$cnum);
+	&Apache::lonhomework::showhash(%slotinfo);
+	my ($tmp)=keys(%slotinfo);
+	if ($tmp=~/^error:/) { return (); }
+	$remembered{$key} = $slotinfo{$which};
+    }
+    if (ref($slotinfo{$which}) eq 'HASH') {
+	return %{$slotinfo{$which}};
+    }
+    return $slotinfo{$which};
+}
 # ------------------------------------------------- Update symbolic store links
 
 sub symblist {
     my ($mapname,%newhash)=@_;
     $mapname=&deversion(&declutter($mapname));
     my %hash;
-    if (($ENV{'request.course.fn'}) && (%newhash)) {
-        if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
+    if (($env{'request.course.fn'}) && (%newhash)) {
+        if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                       &GDBM_WRCREAT(),0640)) {
-	    foreach (keys %newhash) {
-                $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
+	    foreach my $url (keys %newhash) {
+		next if ($url eq 'last_known'
+			 && $env{'form.no_update_last_known'});
+		$hash{declutter($url)}=&encode_symb($mapname,
+						    $newhash{$url}->[1],
+						    $newhash{$url}->[0]);
             }
             if (untie(%hash)) {
 		return 'ok';
@@ -4569,6 +5625,7 @@ sub symbverify {
     my $thisfn=$thisurl;
 # wrapper not part of symbs
     $thisfn=~s/^\/adm\/wrapper//;
+    $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
     $thisfn=&declutter($thisfn);
 # direct jump to resource in page or to a sequence - will construct own symbs
     if ($thisfn=~/\.(page|sequence)$/) { return 1; }
@@ -4584,7 +5641,7 @@ sub symbverify {
     my %bighash;
     my $okay=0;
 
-    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+    if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {
         my $ids=$bighash{'ids_'.&clutter($thisurl)};
         unless ($ids) { 
@@ -4593,12 +5650,15 @@ sub symbverify {
         if ($ids) {
 # ------------------------------------------------------------------- Has ID(s)
 	    foreach (split(/\,/,$ids)) {
-               my ($mapid,$resid)=split(/\./,$_);
+	       my ($mapid,$resid)=split(/\./,$_);
                if (
   &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
    eq $symb) { 
-                  $okay=1; 
-               }
+		   if (($env{'request.role.adv'}) ||
+		       $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
+		       $okay=1; 
+		   }
+	       }
 	   }
         }
 	untie(%bighash);
@@ -4610,7 +5670,7 @@ sub symbverify {
 
 sub symbclean {
     my $symb=shift;
-
+    if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
 # remove version from map
     $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
 
@@ -4620,6 +5680,7 @@ sub symbclean {
 # remove wrapper
 
     $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
+    $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
     return $symb;
 }
 
@@ -4631,22 +5692,23 @@ sub encode_symb {
 }
 
 sub decode_symb {
-    my ($map,$resid,$url)=split(/\_\_\_/,shift);
+    my $symb=shift;
+    if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
+    my ($map,$resid,$url)=split(/___/,$symb);
     return (&fixversion($map),$resid,&fixversion($url));
 }
 
 sub fixversion {
     my $fn=shift;
-    if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
+    if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
     my %bighash;
     my $uri=&clutter($fn);
-    my $key=$ENV{'request.course.id'}.'_'.$uri;
+    my $key=$env{'request.course.id'}.'_'.$uri;
 # is this cached?
-    my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
-				    'courseresversion',600);
+    my ($result,$cached)=&is_cached_new('courseresversion',$key);
     if (defined($cached)) { return $result; }
 # unfortunately not cached, or expired
-    if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+    if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
 	    &GDBM_READER(),0640)) {
  	if ($bighash{'version_'.$uri}) {
  	    my $version=$bighash{'version_'.$uri};
@@ -4657,8 +5719,7 @@ sub fixversion {
  	}
  	untie %bighash;
     }
-    return &do_cache
-	(\%courseresversioncache,$key,&declutter($uri),'courseresversion');
+    return &do_cache_new('courseresversion',$key,&declutter($uri),600);
 }
 
 sub deversion {
@@ -4672,46 +5733,50 @@ sub deversion {
 sub symbread {
     my ($thisfn,$donotrecurse)=@_;
     my $cache_str='request.symbread.cached.'.$thisfn;
-    if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
+    if (defined($env{$cache_str})) { return $env{$cache_str}; }
 # no filename provided? try from environment
     unless ($thisfn) {
-        if ($ENV{'request.symb'}) {
-	    return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
+        if ($env{'request.symb'}) {
+	    return $env{$cache_str}=&symbclean($env{'request.symb'});
 	}
-	$thisfn=$ENV{'request.filename'};
+	$thisfn=$env{'request.filename'};
     }
+    if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
 # is that filename actually a symb? Verify, clean, and return
     if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
 	if (&symbverify($thisfn,$1)) {
-	    return $ENV{$cache_str}=&symbclean($thisfn);
+	    return $env{$cache_str}=&symbclean($thisfn);
 	}
     }
     $thisfn=declutter($thisfn);
     my %hash;
     my %bighash;
     my $syval='';
-    if (($ENV{'request.course.fn'}) && ($thisfn)) {
+    if (($env{'request.course.fn'}) && ($thisfn)) {
         my $targetfn = $thisfn;
-        if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
+        if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
             $targetfn = 'adm/wrapper/'.$thisfn;
         }
-        if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
+	if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
+	    $targetfn=$1;
+	}
+        if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                       &GDBM_READER(),0640)) {
 	    $syval=$hash{$targetfn};
             untie(%hash);
         }
 # ---------------------------------------------------------- There was an entry
         if ($syval) {
-           unless ($syval=~/\_\d+$/) {
-	       unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
-                  &appenv('request.ambiguous' => $thisfn);
-		  return $ENV{$cache_str}='';
-               }    
-               $syval.=$1;
-	   }
+	    #unless ($syval=~/\_\d+$/) {
+		#unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
+		    #&appenv('request.ambiguous' => $thisfn);
+		    #return $env{$cache_str}='';
+		#}    
+		#$syval.=$1;
+	    #}
         } else {
 # ------------------------------------------------------- Was not in symb table
-           if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+           if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {
 # ---------------------------------------------- Get ID(s) for current resource
               my $ids=$bighash{'ids_'.&clutter($thisfn)};
@@ -4728,7 +5793,8 @@ sub symbread {
                  if ($#possibilities==0) {
 # ----------------------------------------------- There is only one possibility
 		     my ($mapid,$resid)=split(/\./,$ids);
-                     $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
+		     $syval=&encode_symb($bighash{'map_id_'.$mapid},
+						    $resid,$thisfn);
                  } elsif (!$donotrecurse) {
 # ------------------------------------------ There is more than one possibility
                      my $realpossible=0;
@@ -4738,8 +5804,8 @@ sub symbread {
          		    my ($mapid,$resid)=split(/\./,$_);
                             if ($bighash{'map_type_'.$mapid} ne 'page') {
 				$realpossible++;
-                                $syval=declutter($bighash{'map_id_'.$mapid}).
-                                       '___'.$resid;
+                                $syval=&encode_symb($bighash{'map_id_'.$mapid},
+						    $resid,$thisfn);
                             }
 			 }
                      }
@@ -4752,11 +5818,11 @@ sub symbread {
            }
         }
         if ($syval) {
-	    return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
+	    return $env{$cache_str}=$syval;
         }
     }
     &appenv('request.ambiguous' => $thisfn);
-    return $ENV{$cache_str}='';
+    return $env{$cache_str}='';
 }
 
 # ---------------------------------------------------------- Return random seed
@@ -4770,6 +5836,7 @@ sub numval {
     $txt=~tr/U-Z/0-5/;
     $txt=~tr/u-z/0-5/;
     $txt=~s/\D//g;
+    if ($_64bit) { if ($txt > 2**32) { return -1; } }
     return int($txt);
 }
 
@@ -4785,26 +5852,80 @@ sub numval2 {
     my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
     my $total;
     foreach my $val (@txts) { $total+=$val; }
+    if ($_64bit) { if ($total > 2**32) { return -1; } }
     return int($total);
 }
 
+sub numval3 {
+    use integer;
+    my $txt=shift;
+    $txt=~tr/A-J/0-9/;
+    $txt=~tr/a-j/0-9/;
+    $txt=~tr/K-T/0-9/;
+    $txt=~tr/k-t/0-9/;
+    $txt=~tr/U-Z/0-5/;
+    $txt=~tr/u-z/0-5/;
+    $txt=~s/\D//g;
+    my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
+    my $total;
+    foreach my $val (@txts) { $total+=$val; }
+    if ($_64bit) { $total=(($total<<32)>>32); }
+    return $total;
+}
+
+sub digest {
+    my ($data)=@_;
+    my $digest=&Digest::MD5::md5($data);
+    my ($a,$b,$c,$d)=unpack("iiii",$digest);
+    my ($e,$f);
+    {
+        use integer;
+        $e=($a+$b);
+        $f=($c+$d);
+        if ($_64bit) {
+            $e=(($e<<32)>>32);
+            $f=(($f<<32)>>32);
+        }
+    }
+    if (wantarray) {
+	return ($e,$f);
+    } else {
+	my $g;
+	{
+	    use integer;
+	    $g=($e+$f);
+	    if ($_64bit) {
+		$g=(($g<<32)>>32);
+	    }
+	}
+	return $g;
+    }
+}
+
 sub latest_rnd_algorithm_id {
-    return '64bit3';
+    return '64bit5';
 }
 
 sub get_rand_alg {
     my ($courseid)=@_;
     if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
     if ($courseid) {
-	return $ENV{"course.$courseid.rndseed"};
+	return $env{"course.$courseid.rndseed"};
     }
     return &latest_rnd_algorithm_id();
 }
 
+sub validCODE {
+    my ($CODE)=@_;
+    if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
+    return 0;
+}
+
 sub getCODE {
-    if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
-    if (defined($Apache::lonhomework::parsing_a_problem) &&
-	defined($Apache::lonhomework::history{'resource.CODE'})) {
+    if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
+    if ( (defined($Apache::lonhomework::parsing_a_problem) ||
+	  defined($Apache::lonhomework::parsing_a_task) ) &&
+	 &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
 	return $Apache::lonhomework::history{'resource.CODE'};
     }
     return undef;
@@ -4822,7 +5943,17 @@ sub rndseed {
     if (!$username) { $username=$wusername }
     my $which=&get_rand_alg();
     if (defined(&getCODE())) {
-	return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
+	if ($which eq '64bit5') {
+	    return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
+	} elsif ($which eq '64bit4') {
+	    return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
+	} else {
+	    return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
+	}
+    } elsif ($which eq '64bit5') {
+	return &rndseed_64bit5($symb,$courseid,$domain,$username);
+    } elsif ($which eq '64bit4') {
+	return &rndseed_64bit4($symb,$courseid,$domain,$username);
     } elsif ($which eq '64bit3') {
 	return &rndseed_64bit3($symb,$courseid,$domain,$username);
     } elsif ($which eq '64bit2') {
@@ -4846,6 +5977,7 @@ sub rndseed_32bit {
 	my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
 	#&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
 	#&Apache::lonxml::debug("rndseed :$num:$symb");
+	if ($_64bit) { $num=(($num<<32)>>32); }
 	return $num;
     }
 }
@@ -4866,6 +5998,8 @@ sub rndseed_64bit {
 	my $num2=$nameseed+$domainseed+$courseseed;
 	#&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
 	#&Apache::lonxml::debug("rndseed :$num:$symb");
+	if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
+	if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
 	return "$num1,$num2";
     }
 }
@@ -4909,11 +6043,43 @@ sub rndseed_64bit3 {
 	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");
+	#&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
+	if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
+	
+	return "$num1:$num2";
+    }
+}
+
+sub rndseed_64bit4 {
+    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 $symbseed=numval3($symb) << 10;
+	my $namechck=unpack("%32S*",$username.' ');
+	
+	my $nameseed=numval3($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 :$num1:$num2:$_64bit");
+	if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
+	
 	return "$num1:$num2";
     }
 }
 
+sub rndseed_64bit5 {
+    my ($symb,$courseid,$domain,$username)=@_;
+    my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
+    return "$num1:$num2";
+}
+
 sub rndseed_CODE_64bit {
     my ($symb,$courseid,$domain,$username)=@_;
     {
@@ -4927,10 +6093,38 @@ sub rndseed_CODE_64bit {
 	my $num2=$CODEseed+$courseseed+$symbchck;
 	#&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
 	#&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
+	if ($_64bit) { $num1=(($num1<<32)>>32); }
+	if ($_64bit) { $num2=(($num2<<32)>>32); }
+	return "$num1:$num2";
+    }
+}
+
+sub rndseed_CODE_64bit4 {
+    my ($symb,$courseid,$domain,$username)=@_;
+    {
+	use integer;
+	my $symbchck=unpack("%32S*",$symb.' ') << 16;
+	my $symbseed=numval3($symb);
+	my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
+	my $CODEseed=numval3(&getCODE());
+	my $courseseed=unpack("%32S*",$courseid.' ');
+	my $num1=$symbseed+$CODEchck;
+	my $num2=$CODEseed+$courseseed+$symbchck;
+	#&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
+	#&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
+	if ($_64bit) { $num1=(($num1<<32)>>32); }
+	if ($_64bit) { $num2=(($num2<<32)>>32); }
 	return "$num1:$num2";
     }
 }
 
+sub rndseed_CODE_64bit5 {
+    my ($symb,$courseid,$domain,$username)=@_;
+    my $code = &getCODE();
+    my ($num1,$num2)=&digest("$symb,$courseid,$code");
+    return "$num1:$num2";
+}
+
 sub setup_random_from_rndseed {
     my ($rndseed)=@_;
     if ($rndseed =~/([,:])/) {
@@ -4948,8 +6142,8 @@ sub latest_receipt_algorithm_id {
 sub recunique {
     my $fucourseid=shift;
     my $unique;
-    if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
-	$unique=$ENV{"course.$fucourseid.internal.encseed"};
+    if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
+	$unique=$env{"course.$fucourseid.internal.encseed"};
     } else {
 	$unique=$perlvar{'lonReceipt'};
     }
@@ -4959,8 +6153,8 @@ sub recunique {
 sub recprefix {
     my $fucourseid=shift;
     my $prefix;
-    if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
-	$prefix=$ENV{"course.$fucourseid.internal.encpref"};
+    if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
+	$prefix=$env{"course.$fucourseid.internal.encpref"};
     } else {
 	$prefix=$perlvar{'lonHostID'};
     }
@@ -4976,8 +6170,8 @@ sub ireceipt {
     my $cunique=&recunique($fucourseid);
     my $cpart=unpack("%32S*",$part);
     my $return =&recprefix($fucourseid).'-';
-    if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
-	$ENV{'request.state'} eq 'construct') {
+    if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
+	$env{'request.state'} eq 'construct') {
 	&Apache::lonxml::debug("doing receipt2  using parts $cpart, uname $cuname and udom $cudom gets  ".($cpart%$cuname).
 			       " and ".($cpart%$cudom));
 			       
@@ -5018,18 +6212,15 @@ sub receipt {
 
 sub getfile {
     my ($file) = @_;
-
-    if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
+    if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
     &repcopy($file);
     return &readfile($file);
 }
 
 sub repcopy_userfile {
     my ($file)=@_;
-
-    if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
-    if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
-
+    if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
+    if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
     my ($cdom,$cnum,$filename) = 
 	($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
     my ($info,$rtncode);
@@ -5052,7 +6243,7 @@ sub repcopy_userfile {
 	    return -1;
 	}
 	if ($info < $fileinfo[9]) {
-	    return OK;
+	    return 'ok';
 	}
 	$info = '';
 	$lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
@@ -5086,19 +6277,19 @@ sub repcopy_userfile {
     open(FILE,">$file");
     print FILE $info;
     close(FILE);
-    return OK;
+    return 'ok';
 }
 
 sub tokenwrapper {
     my $uri=shift;
     $uri=~s|^http\://([^/]+)||;
     $uri=~s|^/||;
-    $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
+    $env{'user.environment'}=~/\/([^\/]+)\.id/;
     my $token=$1;
     my (undef,$udom,$uname,$file)=split('/',$uri,4);
     if ($udom && $uname && $file) {
 	$file=~s|(\?\.*)*$||;
-        &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
+        &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
         return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
                (($uri=~/\?/)?'&':'?').'token='.$token.
                                '&tokenissued='.$perlvar{'lonHostID'};
@@ -5137,52 +6328,64 @@ sub readfile {
 }
 
 sub filelocation {
-  my ($dir,$file) = @_;
-  my $location;
-  $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
-  if ($file=~m:^/~:) { # is a contruction space reference
-    $location = $file;
-    $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
-  } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
-      my ($udom,$uname,$filename)=
-	  ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
-      my $home=&homeserver($uname,$udom);
-      my $is_me=0;
-      my @ids=&current_machine_ids();
-      foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
-      if ($is_me) {
-	  $location=&Apache::loncommon::propath($udom,$uname).
-	      '/userfiles/'.$filename;
-      } else {
-	  $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
-	      $udom.'/'.$uname.'/'.$filename;
-      }
-  } else {
-    $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
-    $file=~s:^/res/:/:;
-    if ( !( $file =~ m:^/:) ) {
-      $location = $dir. '/'.$file;
+    my ($dir,$file) = @_;
+    my $location;
+    $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
+
+    if ($file =~ m-^/adm/-) {
+	$file=~s-^/adm/wrapper/-/-;
+	$file=~s-^/adm/coursedocs/showdoc/-/-;
+    }
+    if ($file=~m:^/~:) { # is a contruction space reference
+        $location = $file;
+        $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
+    } elsif ($file=~m:^/home/[^/]*/public_html/:) {
+	# is a correct contruction space reference
+        $location = $file;
+    } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
+        my ($udom,$uname,$filename)=
+  	    ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
+        my $home=&homeserver($uname,$udom);
+        my $is_me=0;
+        my @ids=&current_machine_ids();
+        foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
+        if ($is_me) {
+  	    $location=&Apache::loncommon::propath($udom,$uname).
+  	      '/userfiles/'.$filename;
+        } else {
+  	  $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
+  	      $udom.'/'.$uname.'/'.$filename;
+        }
     } else {
-      $location = '/home/httpd/html/res'.$file;
+        $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
+        $file=~s:^/res/:/:;
+        if ( !( $file =~ m:^/:) ) {
+            $location = $dir. '/'.$file;
+        } else {
+            $location = '/home/httpd/html/res'.$file;
+        }
     }
-  }
-  $location=~s://+:/:g; # remove duplicate /
-  while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
-  while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
-  return $location;
+    $location=~s://+:/:g; # remove duplicate /
+    while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
+    while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
+    return $location;
 }
 
 sub hreflocation {
     my ($dir,$file)=@_;
     unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
-	my $finalpath=filelocation($dir,$file);
-	$finalpath=~s-^/home/httpd/html--;
-	$finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
-	return $finalpath;
-    } elsif ($file=~m-^/home-) {
-	$file=~s-^/home/httpd/html--;
+	$file=filelocation($dir,$file);
+    } elsif ($file=~m-^/adm/-) {
+	$file=~s-^/adm/wrapper/-/-;
+	$file=~s-^/adm/coursedocs/showdoc/-/-;
+    }
+    if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
+	$file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
+    } elsif ($file=~m-/home/(\w+)/public_html/-) {
 	$file=~s-^/home/(\w+)/public_html/-/~$1/-;
-	return $file;
+    } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
+	$file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
+	    -/uploaded/$1/$2/-x;
     }
     return $file;
 }
@@ -5215,8 +6418,11 @@ sub current_machine_ids {
 
 sub declutter {
     my $thisfn=shift;
+    if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
     $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
     $thisfn=~s/^\///;
+    $thisfn=~s|^adm/wrapper/||;
+    $thisfn=~s|^adm/coursedocs/showdoc/||;
     $thisfn=~s/^res\///;
     $thisfn=~s/\?.+$//;
     return $thisfn;
@@ -5226,12 +6432,45 @@ sub declutter {
 
 sub clutter {
     my $thisfn='/'.&declutter(shift);
-    unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) { 
+    unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) { 
        $thisfn='/res'.$thisfn; 
     }
+    if ($thisfn !~m|/adm|) {
+	if ($thisfn =~ m|/ext/|) {
+	    $thisfn='/adm/wrapper'.$thisfn;
+	} else {
+	    my ($ext) = ($thisfn =~ /\.(\w+)$/);
+	    my $embstyle=&Apache::loncommon::fileembstyle($ext);
+	    if ($embstyle eq 'ssi'
+		|| ($embstyle eq 'hdn')
+		|| ($embstyle eq 'rat')
+		|| ($embstyle eq 'prv')
+		|| ($embstyle eq 'ign')) {
+		#do nothing with these
+	    } elsif (($embstyle eq 'img') 
+		|| ($embstyle eq 'emb')
+		|| ($embstyle eq 'wrp')) {
+		$thisfn='/adm/wrapper'.$thisfn;
+	    } elsif ($embstyle eq 'unk'
+		     && $thisfn!~/\.(sequence|page)$/) {
+		$thisfn='/adm/coursedocs/showdoc'.$thisfn;
+	    } else {
+#		&logthis("Got a blank emb style");
+	    }
+	}
+    }
     return $thisfn;
 }
 
+sub freeze_escape {
+    my ($value)=@_;
+    if (ref($value)) {
+	$value=&nfreeze($value);
+	return '__FROZEN__'.&escape($value);
+    }
+    return &escape($value);
+}
+
 # -------------------------------------------------------- Escape Special Chars
 
 sub escape {
@@ -5248,11 +6487,14 @@ sub unescape {
     return $str;
 }
 
-sub mod_perl_version {
-    if (defined($perlvar{'MODPERL2'})) {
-	return 2;
+sub thaw_unescape {
+    my ($value)=@_;
+    if ($value =~ /^__FROZEN__/) {
+	substr($value,0,10,undef);
+	$value=&unescape($value);
+	return &thaw($value);
     }
-    return 1;
+    return &unescape($value);
 }
 
 sub correct_line_ends {
@@ -5265,17 +6507,20 @@ sub correct_line_ends {
 sub goodbye {
    &logthis("Starting Shut down");
 #not converted to using infrastruture and probably shouldn't be
-   &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
+   &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%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)));
+#   &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
+   &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
+#   &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
+#   &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
 #1.1 only
-   &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
-   &logthis(sprintf("%-20s is %s",'%getsectioncache',scalar(%getsectioncache)));
-   &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
-   &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
+#   &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
+#   &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
+#   &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
+#   &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
+   &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
+   &logthis(sprintf("%-20s is %s",'kicks',$kicks));
+   &logthis(sprintf("%-20s is %s",'hits',$hits));
    &flushcourselogs();
    &logthis("Shutting down");
    return DONE;
@@ -5285,6 +6530,7 @@ BEGIN {
 # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
     unless ($readit) {
 {
+    # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
     open(my $config,"</etc/httpd/conf/loncapa.conf");
 
     while (my $configline=<$config>) {
@@ -5321,7 +6567,7 @@ BEGIN {
 #           next if /^\#/;
            chomp;
            my ($domain, $domain_description, $def_auth, $def_auth_arg,
-	       $def_lang, $city, $longi, $lati) = split(/:/,$_);
+	       $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
 	   $domain_auth_def{$domain}=$def_auth;
            $domain_auth_arg_def{$domain}=$def_auth_arg;
 	   $domaindescription{$domain}=$domain_description;
@@ -5329,6 +6575,7 @@ BEGIN {
 	   $domain_city{$domain}=$city;
 	   $domain_longi{$domain}=$longi;
 	   $domain_lati{$domain}=$lati;
+           $domain_primary{$domain}=$primary;
 
  #         &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
 #          &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
@@ -5345,16 +6592,39 @@ BEGIN {
     while (my $configline=<$config>) {
        next if ($configline =~ /^(\#|\s*$)/);
        chomp($configline);
-       my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
-       if ($id && $domain && $role && $name && $ip) {
+       my ($id,$domain,$role,$name)=split(/:/,$configline);
+       $name=~s/\s//g;
+       if ($id && $domain && $role && $name) {
 	 $hostname{$id}=$name;
 	 $hostdom{$id}=$domain;
-	 $hostip{$id}=$ip;
-	 $iphost{$ip}=$id;
 	 if ($role eq 'library') { $libserv{$id}=$name; }
        }
     }
     close($config);
+    # FIXME: dev server don't want this, production servers _do_ want this
+    #&get_iphost();
+}
+
+sub get_iphost {
+    if (%iphost) { return %iphost; }
+    my %name_to_ip;
+    foreach my $id (keys(%hostname)) {
+	my $name=$hostname{$id};
+	my $ip;
+	if (!exists($name_to_ip{$name})) {
+	    $ip = gethostbyname($name);
+	    if (!$ip || length($ip) ne 4) {
+		&logthis("Skipping host $id name $name no IP found\n");
+		next;
+	    }
+	    $ip=inet_ntoa($ip);
+	    $name_to_ip{$name} = $ip;
+	} else {
+	    $ip = $name_to_ip{$name};
+	}
+	push(@{$iphost{$ip}},$id);
+    }
+    return %iphost;
 }
 
 # ------------------------------------------------------ Read spare server file
@@ -5420,14 +6690,20 @@ BEGIN {
 
 }
 
-%metacache=();
+$memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
 
 $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
 $dumpcount=0;
 
 &logtouch();
-&logthis('<font color=yellow>INFO: Read configuration</font>');
+&logthis('<font color="yellow">INFO: Read configuration</font>');
 $readit=1;
+    {
+	use integer;
+	my $test=(2**32)+1;
+	if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
+	&logthis(" Detected 64bit platform ($_64bit)");
+    }
 }
 }
 
@@ -5602,14 +6878,14 @@ that was requested
 X<appenv()>
 B<appenv(%hash)>: the value of %hash is written to
 the user envirnoment file, and will be restored for each access this
-user makes during this session, also modifies the %ENV for the current
+user makes during this session, also modifies the %env for the current
 process
 
 =item *
 X<delenv()>
 B<delenv($regexp)>: removes all items from the session
 environment file that matches the regular expression in $regexp. The
-values are also delted from the current processes %ENV.
+values are also delted from the current processes %env.
 
 =back
 
@@ -5822,13 +7098,17 @@ revokecustomrole($udom,$uname,$url,$role
 
 =item *
 
-coursedescription($courseid) : course description
+coursedescription($courseid) : returns a hash of information about the
+specified course id, including all environment settings for the
+course, the description of the course will be in the hash under the
+key 'description'
 
 =item *
 
-courseresdata($coursenum,$coursedomain,@which) : request for current
-parameter setting for a specific course, @what should be a list of
-parameters to ask about. This routine caches answers for 5 minutes.
+resdata($name,$domain,$type,@which) : request for current parameter
+setting for a specific $type, where $type is either 'course' or 'user',
+@what should be a list of parameters to ask about. This routine caches
+answers for 5 minutes.
 
 =back
 
@@ -5859,8 +7139,8 @@ subscribe($fname) : subscribe to a resou
 
 repcopy($filename) : subscribes to the requested file, and attempts to
 replicate from the owning library server, Might return
-HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
-HTTP_BAD_REQUEST, also attempts to grab the metadata for the
+'unavailable', 'not_found', 'forbidden', 'ok', or
+'bad_request', also attempts to grab the metadata for the
 resource. Expects the local filesystem pathname
 (/home/httpd/html/res/....)
 
@@ -5914,9 +7194,10 @@ returns the data handle
 =item *
 
 symbverify($symb,$thisfn) : verifies that $symb actually exists and is
-a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
-failure, user must be in a course, as it assumes the existance of the
-course initi hash, and uses $ENV('request.course.id'}
+a possible symb for the URL in $thisfn, and if is an encryypted
+resource that the user accessed using /enc/ returns a 1 on success, 0
+on failure, user must be in a course, as it assumes the existance of
+the course initial hash, and uses $env('request.course.id'}
 
 
 =item *
@@ -5947,7 +7228,7 @@ unfakeable, receipt
 
 =item *
 
-receipt() : API to ireceipt working off of ENV values; given out to users
+receipt() : API to ireceipt working off of env values; given out to users
 
 =item *
 
@@ -5981,7 +7262,7 @@ forcing spreadsheet to reevaluate the re
 store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
 for this url; hashref needs to be given and should be a \%hashname; the
 remaining args aren't required and if they aren't passed or are '' they will
-be derived from the ENV
+be derived from the env
 
 =item *
 
@@ -5995,6 +7276,27 @@ all args are optional
 
 =item *
 
+dumpstore($namespace,$udom,$uname,$regexp,$range) : 
+dumps the complete (or key matching regexp) namespace into a hash
+($udom, $uname, $regexp, $range are optional) for a namespace that is
+normally &store()ed into
+
+$range should be either an integer '100' (give me the first 100
+                                           matching records)
+              or be  two integers sperated by a - with no spaces
+                 '30-50' (give me the 30th through the 50th matching
+                          records)
+
+
+=item *
+
+putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
+replaces a &store() version of data with a replacement set of data
+for a particular resource in a namespace passed in the $storehash hash 
+reference
+
+=item *
+
 tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
 works very similar to store/cstore, but all data is stored in a
 temporary location and can be reset using tmpreset, $storehash should
@@ -6024,10 +7326,15 @@ namesp ($udom and $uname are optional)
 
 =item *
 
-dump($namespace,$udom,$uname,$regexp) : 
+dump($namespace,$udom,$uname,$regexp,$range) : 
 dumps the complete (or key matching regexp) namespace into a hash
-($udom, $uname and $regexp are optional)
+($udom, $uname, $regexp, $range are optional)
 
+$range should be either an integer '100' (give me the first 100
+                                           matching records)
+              or be  two integers sperated by a - with no spaces
+                 '30-50' (give me the 30th through the 50th matching
+                          records)
 =item *
 
 inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
@@ -6043,17 +7350,6 @@ put($namespace,$storehash,$udom,$uname)
 
 =item *
 
-putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
-keys used in storehash include version information (e.g., 1:$symb:message etc.) as
-used in records written by &store and retrieved by &restore.  This function 
-was created for use in editing discussion posts, without incrementing the
-version number included in the key for a particular post. The colon 
-separated list of attribute names (e.g., the value associated with the key 
-1:keys:$symb) is also generated and passed in the ampersand separated 
-items sent to lonnet::reply().  
-
-=item *
-
 cput($namespace,$storehash,$udom,$uname) : critical put
 ($udom and $uname are optional)
 
@@ -6183,6 +7479,16 @@ getfile($file,$caller) : two cases - req
    - returns the entire contents of a file or -1; 
    it properly subscribes to and replicates the file if neccessary.
 
+
+=item *
+
+stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
+                  reference
+
+returns either a stat() list of data about the file or an empty list
+if the file doesn't exist or couldn't find out about it (connection
+problems or user unknown)
+
 =item *
 
 filelocation($dir,$file) : returns file system location of a file
@@ -6201,6 +7507,90 @@ declutter() : declutters URLs (remove do
 
 =back
 
+=head2 Usererfile file routines (/uploaded*)
+
+=over 4
+
+=item *
+
+userfileupload(): main rotine for putting a file in a user or course's
+                  filespace, arguments are,
+
+ formname - required - this is the name of the element in $env where the
+           filename, and the contents of the file to create/modifed exist
+           the filename is in $env{'form.'.$formname.'.filename'} and the
+           contents of the file is located in $env{'form.'.$formname}
+ coursedoc - if true, store the file in the course of the active role
+             of the current user
+ subdir - required - subdirectory to put the file in under ../userfiles/
+         if undefined, it will be placed in "unknown"
+
+ (This routine calls clean_filename() to remove any dangerous
+ characters from the filename, and then calls finuserfileupload() to
+ complete the transaction)
+
+ returns either the url of the uploaded file (/uploaded/....) if successful
+ and /adm/notfound.html if unsuccessful
+
+=item *
+
+clean_filename(): routine for cleaing a filename up for storage in
+                 userfile space, argument is:
+
+ filename - proposed filename
+
+returns: the new clean filename
+
+=item *
+
+finishuserfileupload(): routine that creaes and sends the file to
+userspace, probably shouldn't be called directly
+
+  docuname: username or courseid of destination for the file
+  docudom: domain of user/course of destination for the file
+  formname: same as for userfileupload()
+  fname: filename (inculding subdirectories) for the file
+
+ returns either the url of the uploaded file (/uploaded/....) if successful
+ and /adm/notfound.html if unsuccessful
+
+=item *
+
+renameuserfile(): renames an existing userfile to a new name
+
+  Args:
+   docuname: username or courseid of destination for the file
+   docudom: domain of user/course of destination for the file
+   old: current file name (including any subdirs under userfiles)
+   new: desired file name (including any subdirs under userfiles)
+
+=item *
+
+mkdiruserfile(): creates a directory is a userfiles dir
+
+  Args:
+   docuname: username or courseid of destination for the file
+   docudom: domain of user/course of destination for the file
+   dir: dir to create (including any subdirs under userfiles)
+
+=item *
+
+removeuserfile(): removes a file that exists in userfiles
+
+  Args:
+   docuname: username or courseid of destination for the file
+   docudom: domain of user/course of destination for the file
+   fname: filname to delete (including any subdirs under userfiles)
+
+=item *
+
+removeuploadedurl(): convience function for removeuserfile()
+
+  Args:
+   url:  a full /uploaded/... url to delete
+
+=back
+
 =head2 HTTP Helper Routines
 
 =over 4