--- loncom/lonnet/perl/lonnet.pm	2004/11/10 06:02:11	1.566
+++ loncom/lonnet/perl/lonnet.pm	2005/02/13 23:09:03	1.587.2.3.2.3
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.566 2004/11/10 06:02:11 banghart Exp $
+# $Id: lonnet.pm,v 1.587.2.3.2.3 2005/02/13 23:09:03 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,9 +36,9 @@ 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
+   %libserv %pr %prp $memcache %packagetab %courseresversioncache %resversioncache
    %courselogs %accesshash %userrolehash $processmarker $dumpcount 
-   %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseresdatacache 
+   %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %courseresdatacache 
    %userresdatacache %getsectioncache %domaindescription %domain_auth_def %domain_auth_arg_def 
    %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit);
 
@@ -50,6 +50,7 @@ use Fcntl qw(:flock);
 use Apache::lonlocal;
 use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
 use Time::HiRes qw( gettimeofday tv_interval );
+use Cache::Memcached;
 my $readit;
 my $max_connection_retries = 10;     # Or some such value.
 
@@ -157,22 +158,6 @@ 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:".
                 " $cmd to $server returned $answer</font>");
@@ -220,11 +205,8 @@ sub critical {
     }
     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;
@@ -942,6 +924,7 @@ sub save_cache_item {
 }
 
 sub save_cache {
+    &purge_remembered();
     if ($disk_caching_disabled) { return; }
     my ($cache,$name,$id);
     foreach $name (keys(%do_save)) {
@@ -1039,6 +1022,80 @@ EVALBLOCK
 #    &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
 }
 
+sub devalidate_cache_new {
+    my ($name,$id) = @_;
+    if (1) { &Apache::lonnet::logthis("deleting $name:$id"); }
+    $memcache->delete(&escape($name.':'.$id));
+}
+
+my $to_remember=10;
+my %remembered;
+my %accessed;
+my $kicks=0;
+my $hits=0;
+sub is_cached_new {
+    my ($name,$id,$debug) = @_;
+    $debug=0;
+    $id=&escape($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 $id is not defined"); }
+	return (undef,undef);
+    }
+    &make_room($id,$value);
+    if ($value eq '__undef__') {
+	if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
+	return (undef,1);
+    }
+    if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
+    return ($value,1);
+}
+
+sub do_cache_new {
+    my ($name,$id,$value,$time,$debug) = @_;
+    $debug=0;
+    $id=&escape($name.':'.$id);
+    my $setvalue=$value;
+    if (!defined($setvalue)) {
+	$setvalue='__undef__';
+    }
+    if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
+    $memcache->set($id,$setvalue,300);
+    return $value;
+}
+
+sub make_room {
+    my ($id,$value)=@_;
+    my $debug=0;
+    $remembered{$id}=$value;
+    $accessed{$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 $max_time $kicks\n"); }
+    return;
+}
+
+sub purge_remembered {
+    &logthis("Tossing ".scalar(keys(%remembered)));
+    undef(%remembered);
+    undef(%accessed);
+}
 # ------------------------------------- Read an entry from a user's environment
 
 sub userenvironment {
@@ -1406,13 +1463,13 @@ sub finishuserfileupload {
     }
 # Save the file
     {
-	#&Apache::lonnet::logthis("Saving to $filepath $file");
-       open(my $fh,'>'.$filepath.'/'.$file);
-       print $fh $ENV{'form.'.$formname};
-       close($fh);
+	open(FH,'>'.$filepath.'/'.$file);
+	print FH $ENV{'form.'.$formname};
+	close(FH);
     }
 # Notify homeserver to grep it
 #
+    &Apache::lonnet::logthis("fetching ".$path.$file);
     my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
     if ($fetchresult eq 'ok') {
 #
@@ -1490,12 +1547,12 @@ sub flushcourselogs {
         if ($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 
@@ -1570,6 +1627,8 @@ sub courselog {
        $ENV{'course.'.$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 {
@@ -1586,11 +1645,23 @@ sub courseacclog {
     my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
     if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
         $what.=':POST';
+        # FIXME: Probably ought to escape things....
 	foreach (keys %ENV) {
             if ($_=~/^form\.(.*)/) {
 		$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};
+            }
+        }
     }
     &courselog($what);
 }
@@ -1642,6 +1713,7 @@ sub get_course_adv_roles {
         if (($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; }
         my $key=&plaintext($role);
@@ -1713,7 +1785,7 @@ sub courseidput {
 }
 
 sub courseiddump {
-    my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
+    my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$hostidflag,$hostidref)=@_;
     my %returnhash=();
     unless ($domfilter) { $domfilter=''; }
     foreach my $tryserver (keys %libserv) {
@@ -1721,7 +1793,8 @@ sub courseiddump {
 	    if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
 	        foreach (
                  split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
-			       $sincefilter.':'.&escape($descfilter),
+			       $sincefilter.':'.&escape($descfilter).':'.
+                               &escape($instcodefilter).':'.&escape($ownerfilter),
                                $tryserver))) {
 		    my ($key,$value)=split(/\=/,$_);
                     if (($key) && ($value)) {
@@ -2360,7 +2433,7 @@ 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);
@@ -2387,105 +2460,37 @@ sub rolesinit {
     my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
     if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
     my %allroles=();
-    my %thesepriv=();
     my $now=time;
     my $userroles="user.login.time=$now\n";
-    my $thesestr;
 
     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,$tstart);
+	    if ($role=~/^cr/) { 
+		($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
+		($tend,$tstart)=split('_',$trest);
+	    } 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,$area);
 		} else {
-		    if (defined($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 $author=0;
-        foreach (keys %allroles) {
-            %thesepriv=();
-            if (($_=~/^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}.=$restrictions;
-                        }
-                    }
-		    if ($thesepriv{'adv'} eq 'F') { $adv=1; }
-                }
-            }
-            $thesestr='';
-            foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
-            $userroles.='user.priv.'.$_.'='.$thesestr."\n";
-        }
+        my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
         $userroles.='user.adv='.$adv."\n".
 	            'user.author='.$author."\n";
         $ENV{'user.adv'}=$adv;
@@ -2493,6 +2498,84 @@ sub rolesinit {
     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}.=':'.$coursepriv;
+                }
+            }
+        }
+    }
+}
+
+
+sub standard_roleprivs {
+    my ($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) = @_; 
+    my $author=0;
+    my $adv=0;
+    foreach (keys %{$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
 
 sub get {
@@ -2770,7 +2853,7 @@ sub customaccess {
 # ------------------------------------------------- Check for a user privilege
 
 sub allowed {
-    my ($priv,$uri)=@_;
+    my ($priv,$uri,$symb)=@_;
     $uri=&deversion($uri);
     my $orguri=$uri;
     $uri=&declutter($uri);
@@ -3051,7 +3134,7 @@ sub allowed {
 
    if ($thisallowed=~/X/) {
       if ($ENV{'acc.randomout'}) {
-         my $symb=&symbread($uri,1);
+	 if (!$symb) { $symb=&symbread($uri,1); }
          if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) { 
             return ''; 
          }
@@ -3353,11 +3436,18 @@ sub auto_instcode_format {
     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{$_}).'&';
     }
@@ -3684,7 +3774,7 @@ 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)) {
@@ -3719,7 +3809,7 @@ 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;
@@ -3806,6 +3896,75 @@ sub mark_as_readonly {
     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 {
@@ -3825,7 +3984,25 @@ sub get_marked_as_readonly {
     }
     return @readonly_files;
 }
+#-----------------------------------------------------------Get Marked as Read Only Hash
 
+sub get_marked_as_readonly_hash {
+    my ($domain,$user,$what) = @_;
+    my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
+    my %readonly_files;
+    while (my ($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 {
@@ -4337,6 +4514,7 @@ 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"};
 	}
@@ -4362,6 +4540,7 @@ sub add_prefix_and_part {
 
 # ---------------------------------------------------------------- Get metadata
 
+my %metaentry;
 sub metadata {
     my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
     $uri=&declutter($uri);
@@ -4381,28 +4560,29 @@ 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/|) {
 	    my $file=&filelocation('',&clutter($filename));
-	    push(@{$metacache{$uri.'.file'}},$file);
+	    #push(@{$metaentry{$uri.'.file'}},$file);
 	    $metastring=&getfile($file);
 	}
         my $parser=HTML::LCParser->new(\$metastring);
@@ -4419,10 +4599,10 @@ sub metadata {
 		    if (defined($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) {
 			my $part=$keyroot;
@@ -4444,14 +4624,14 @@ 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'};
 			    }
 			}
 		    }
@@ -4484,7 +4664,7 @@ sub metadata {
 			    foreach (sort(split(/\,/,&metadata($uri,'keys',
 							       $location,$unikey,
 							       $depthcount+1)))) {
-				$metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
+				$metaentry{':'.$_}=$metaentry{':'.$_};
 				$metathesekeys{$_}=1;
 			    }
 			}
@@ -4495,18 +4675,18 @@ 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}=$internaltext;
 			}
 # end of not-a-package not-a-library import
 		    }
@@ -4523,7 +4703,7 @@ sub metadata {
 	    &metadata_create_package_def($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; }
@@ -4532,31 +4712,31 @@ 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);
 # this is the end of "was not already recently cached
     }
-    return $metacache{$uri}->{':'.$what};
+    return $metaentry{':'.$what};
 }
 
 sub metadata_create_package_def {
@@ -4564,22 +4744,22 @@ 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'};
     }
 }
 
@@ -4617,8 +4797,10 @@ sub gettitle {
     my $urlsymb=shift;
     my $symb=&symbread($urlsymb);
     if ($symb) {
-	my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
-	if (defined($cached)) { return $result; }
+	my ($result,$cached)=&is_cached_new('title',$symb);
+	if (defined($cached)) { 
+	    return $result;
+	}
 	my ($map,$resid,$url)=&decode_symb($symb);
 	my $title='';
 	my %bighash;
@@ -4630,7 +4812,7 @@ sub gettitle {
 	}
 	$title=~s/\&colon\;/\:/gs;
 	if ($title) {
-	    return &do_cache(\%titlecache,$symb,$title,'title');
+	    return &do_cache_new('title',$symb,$title,600);
 	}
 	$urlsymb=$url;
     }
@@ -4694,8 +4876,11 @@ sub symbverify {
                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);
@@ -4707,7 +4892,7 @@ 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\_\_\_/;
 
@@ -4728,7 +4913,9 @@ 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));
 }
 
@@ -4777,6 +4964,7 @@ sub symbread {
 	}
 	$thisfn=$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,$1)) {
@@ -4887,8 +5075,25 @@ sub numval2 {
     return int($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 latest_rnd_algorithm_id {
-    return '64bit3';
+    return '64bit4';
 }
 
 sub get_rand_alg {
@@ -4927,7 +5132,13 @@ 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 '64bit4') {
+	    return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
+	} else {
+	    return &rndseed_CODE_64bit($symb,$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') {
@@ -5024,6 +5235,30 @@ sub rndseed_64bit3 {
     }
 }
 
+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_CODE_64bit {
     my ($symb,$courseid,$domain,$username)=@_;
     {
@@ -5043,6 +5278,25 @@ sub rndseed_CODE_64bit {
     }
 }
 
+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 setup_random_from_rndseed {
     my ($rndseed)=@_;
     if ($rndseed =~/([,:])/) {
@@ -5327,6 +5581,7 @@ 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/^res\///;
@@ -5380,10 +5635,10 @@ sub thaw_unescape {
 }
 
 sub mod_perl_version {
+    return 1;
     if (defined($perlvar{'MODPERL2'})) {
 	return 2;
     }
-    return 1;
 }
 
 sub correct_line_ends {
@@ -5396,17 +5651,20 @@ 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;
@@ -5416,6 +5674,7 @@ 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>) {
@@ -5551,7 +5810,7 @@ BEGIN {
 
 }
 
-%metacache=();
+$memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
 
 $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
 $dumpcount=0;
@@ -5562,7 +5821,7 @@ $readit=1;
     {
 	use integer;
 	my $test=(2**32)+1;
-	if ($test != 0) { $_64bit=1; }
+	if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
 	&logthis(" Detected 64bit platform ($_64bit)");
     }
 }
@@ -6051,9 +6310,10 @@ 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 *