--- loncom/lonnet/perl/lonnet.pm	2003/11/12 21:37:33	1.450
+++ loncom/lonnet/perl/lonnet.pm	2004/03/16 21:29:31	1.478
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.450 2003/11/12 21:37:33 matthew Exp $
+# $Id: lonnet.pm,v 1.478 2004/03/16 21:29:31 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -377,7 +377,12 @@ sub delenv {
 	    return 'error: '.$!;
 	}
 	foreach (@oldenv) {
-	    unless ($_=~/^$delthis/) { print $fh $_; }
+	    if ($_=~/^$delthis/) { 
+                my ($key,undef) = split('=',$_);
+                delete($ENV{$key});
+            } else {
+                print $fh $_; 
+            }
 	}
 	close($fh);
     }
@@ -506,38 +511,16 @@ sub changepass {
 
 sub queryauthenticate {
     my ($uname,$udom)=@_;
-    if (($perlvar{'lonRole'} eq 'library') && 
-        ($udom eq $perlvar{'lonDefDomain'})) {
-	my $answer=reply("encrypt:currentauth:$udom:$uname",
-			 $perlvar{'lonHostID'});
-	unless ($answer eq 'unknown_user' or $answer eq 'refused') {
-	    if (length($answer)) {
-		return $answer;
-	    }
-	    else {
-	&logthis("User $uname at $udom lacks an authentication mechanism");
-		return 'no_host';
-	    }
-	}
-    }
-
-    my $tryserver;
-    foreach $tryserver (keys %libserv) {
-	if ($hostdom{$tryserver} eq $udom) {
-           my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
-	   unless ($answer eq 'unknown_user' or $answer eq 'refused') {
-	       if (length($answer)) {
-		   return $answer;
-	       }
-	       else {
-	   &logthis("User $uname at $udom lacks an authentication mechanism");
-		   return 'no_host';
-	       }
-	   }
-       }
+    my $uhome=&homeserver($uname,$udom);
+    if (!$uhome) {
+	&logthis("User $uname at $udom is unknown when looking for authentication mechanism");
+	return 'no_host';
+    }
+    my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
+    if ($answer =~ /^(unknown_user|refused|con_lost)/) {
+	&logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
     }
-    &logthis("User $uname at $udom lacks an authentication mechanism");    
-    return 'no_host';
+    return $answer;
 }
 
 # --------- Try to authenticate user from domain's lib servers (first this one)
@@ -546,38 +529,21 @@ sub authenticate {
     my ($uname,$upass,$udom)=@_;
     $upass=escape($upass);
     $uname=~s/\W//g;
-    if (($perlvar{'lonRole'} eq 'library') && 
-        ($udom eq $perlvar{'lonDefDomain'})) {
-    my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
-        if ($answer =~ /authorized/) {
-              if ($answer eq 'authorized') {
-                 &logthis("User $uname at $udom authorized by local server"); 
-                 return $perlvar{'lonHostID'}; 
-              }
-              if ($answer eq 'non_authorized') {
-                 &logthis("User $uname at $udom rejected by local server"); 
-                 return 'no_host'; 
-              }
-	}
-    }
-
-    my $tryserver;
-    foreach $tryserver (keys %libserv) {
-	if ($hostdom{$tryserver} eq $udom) {
-           my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
-           if ($answer =~ /authorized/) {
-              if ($answer eq 'authorized') {
-                 &logthis("User $uname at $udom authorized by $tryserver"); 
-                 return $tryserver; 
-              }
-              if ($answer eq 'non_authorized') {
-                 &logthis("User $uname at $udom rejected by $tryserver");
-                 return 'no_host';
-              } 
-	   }
-       }
+    my $uhome=&homeserver($uname,$udom);
+    if (!$uhome) {
+	&logthis("User $uname at $udom is unknown in authenticate");
+	return 'no_host';
+    }
+    my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
+    if ($answer eq 'authorized') {
+	&logthis("User $uname at $udom authorized by $uhome"); 
+	return $uhome; 
+    }
+    if ($answer eq 'non_authorized') {
+	&logthis("User $uname at $udom rejected by $uhome");
+	return 'no_host'; 
     }
-    &logthis("User $uname at $udom could not be authenticated");    
+    &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
     return 'no_host';
 }
 
@@ -848,10 +814,14 @@ sub getsection {
     return '-1';
 }
 
+
+my $disk_caching_disabled=1;
+
 sub devalidate_cache {
     my ($cache,$id,$name) = @_;
     delete $$cache{$id.'.time'};
     delete $$cache{$id};
+    if ($disk_caching_disabled) { return; }
     my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
     open(DB,"$filename.lock");
     flock(DB,LOCK_EX);
@@ -907,6 +877,7 @@ sub do_cache {
 
 sub save_cache_item {
     my ($cache,$name,$id)=@_;
+    if ($disk_caching_disabled) { return; }
     my $starttime=&Time::HiRes::time();
 #    &logthis("Saving :$name:$id");
     my %hash;
@@ -936,6 +907,7 @@ EVALBLOCK
 
 sub load_cache_item {
     my ($cache,$name,$id)=@_;
+    if ($disk_caching_disabled) { return; }
     my $starttime=&Time::HiRes::time();
 #    &logthis("Before Loading $name  for $id size is ".scalar(%$cache));
     my %hash;
@@ -1153,8 +1125,8 @@ sub ssi_body {
     my ($filelink,%form)=@_;
     my $output=($filelink=~/^http\:/?&externalssi($filelink):
                                      &ssi($filelink,%form));
-    $output=~s/^.*\<body[^\>]*\>//si;
-    $output=~s/\<\/body\s*\>.*$//si;
+    $output=~s/^.*?\<body[^\>]*\>//si;
+    $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
     $output=~
             s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
     return $output;
@@ -1199,7 +1171,8 @@ sub tokenwrapper {
     $uri=~s/^\///;
     $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
     my $token=$1;
-    if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
+#    if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
+    if ($uri=~m|^uploaded/([^/]+)/([^/]+)/(.+)(\?\.*)*$|) {
 	&appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
         return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
                (($uri=~/\?/)?'&':'?').'token='.$token.
@@ -1208,7 +1181,65 @@ sub tokenwrapper {
 	return '/adm/notfound.html';
     }
 }
-    
+
+# --------- 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.
+# output: ok if successful, diagnostic message otherwise
+#
+# Allows directory structure to be used within lonUsers/../userfiles/ for a 
+# course.
+#
+# action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
+#          will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
+#          course's home server.
+#
+# action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
+#          be copied from $source (current location) to 
+#          /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
+#         and will then be copied to
+#          /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
+#         course's home server.
+
+sub process_coursefile {
+    my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
+    my $fetchresult;
+    if ($action eq 'propagate') {
+        $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
+                            ,$docuhome);
+    } elsif ($action eq 'copy') {
+        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);
+                }
+            }
+        }
+        if ($source eq '') {
+            $fetchresult = 'no source file';
+        } else {
+            my $destination = $filepath.'/'.$fname;
+            print STDERR "Getting ready to rename $source to $destination\n";
+            rename($source,$destination);
+            $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
+                                 $docuhome);
+        }
+    }
+    unless ( ($fetchresult eq 'ok') || ($fetchresult eq 'no source file') ) {
+        &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
+             ' to host '.$docuhome.': '.$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
@@ -1264,9 +1295,8 @@ sub finishuserfileupload {
     }
 # Notify homeserver to grep it
 #
-    
-    my $fetchresult= 
- &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
+    my $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,
+			    $docuhome);
     if ($fetchresult eq 'ok') {
 #
 # Return the URL to it
@@ -1335,8 +1365,15 @@ sub flushcourselogs {
 # Writes to the dynamic metadata of resources to get hit counts, etc.
 #
     foreach my $entry (keys(%accesshash)) {
-        my ($dom,$name,undef,$type)=($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
-        if ($type eq 'count'){
+        if ($entry =~ /___count$/) {
+            my ($dom,$name);
+            ($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 $value = $accesshash{$entry};
             my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
             my %temphash=($url => $value);
@@ -1351,6 +1388,7 @@ sub flushcourselogs {
                 }
             }
         } else {
+            my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
             my %temphash=($entry => $accesshash{$entry});
             if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
                 delete $accesshash{$entry};
@@ -1391,8 +1429,7 @@ sub courselog {
     } else {
 	$courselogs{$ENV{'request.course.id'}}.=$what;
     }
-#    if (length($courselogs{$ENV{'request.course.id'}})>4048) {
-    if (length($courselogs{$ENV{'request.course.id'}})>48) {
+    if (length($courselogs{$ENV{'request.course.id'}})>4048) {
 	&flushcourselogs();
     }
 }
@@ -1414,6 +1451,7 @@ 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;
     my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
@@ -1432,7 +1470,7 @@ sub userrolelog {
     my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
     if (($trole=~/^ca/) || ($trole=~/^in/) || 
         ($trole=~/^cc/) || ($trole=~/^ep/) ||
-        ($trole=~/^cr/)) {
+        ($trole=~/^cr/) || ($trole=~/^ta/)) {
        my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
        $userrolehash
          {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
@@ -1444,6 +1482,10 @@ sub get_course_adv_roles {
     my $cid=shift;
     $cid=$ENV{'request.course.id'} unless (defined($cid));
     my %coursehash=&coursedescription($cid);
+    my %nothide=();
+    foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
+	$nothide{join(':',split(/[\@\:]/,$_))}=1;
+    }
     my %returnhash=();
     my %dumphash=
             &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
@@ -1454,6 +1496,8 @@ sub get_course_adv_roles {
         if (($tend) && ($tend<$now)) { next; }
         if (($tstart) && ($now<$tstart)) { next; }
         my ($role,$username,$domain,$section)=split(/\:/,$_);
+	if ((&privileged($username,$domain)) && 
+	    (!$nothide{$username.':'.$domain})) { next; }
         my $key=&plaintext($role);
         if ($section) { $key.=' (Sec/Grp '.$section.')'; }
         if ($returnhash{$key}) {
@@ -2135,6 +2179,36 @@ sub coursedescription {
     return %returnhash;
 }
 
+# -------------------------------------------------See if a user is privileged
+
+sub privileged {
+    my ($username,$domain)=@_;
+    my $rolesdump=&reply("dump:$domain:$username:roles",
+			&homeserver($username,$domain));
+    if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
+    my $now=time;
+    if ($rolesdump ne '') {
+        foreach (split(/&/,$rolesdump)) {
+	    if ($_!~/^rolesdef\&/) {
+		my ($area,$role)=split(/=/,$_);
+		$area=~s/\_\w\w$//;
+		my ($trole,$tend,$tstart)=split(/_/,$role);
+		if (($trole eq 'dc') || ($trole eq 'su')) {
+		    my $active=1;
+		    if ($tend) {
+			if ($tend<$now) { $active=0; }
+		    }
+		    if ($tstart) {
+			if ($tstart>$now) { $active=0; }
+		    }
+		    if ($active) { return 1; }
+		}
+	    }
+	}
+    }
+    return 0;
+}
+
 # -------------------------------------------------------- Get user privileges
 
 sub rolesinit {
@@ -3138,10 +3212,11 @@ sub modifyuser {
 
 sub modifystudent {
     my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
-        $end,$start,$forceid,$desiredhome,$email)=@_;
-    my $cid='';
-    unless ($cid=$ENV{'request.course.id'}) {
-	return 'not_in_class';
+        $end,$start,$forceid,$desiredhome,$email,$type,$cid)=@_;
+    if (!$cid) {
+	unless ($cid=$ENV{'request.course.id'}) {
+	    return 'not_in_class';
+	}
     }
 # --------------------------------------------------------------- Make the user
     my $reply=&modifyuser
@@ -3151,24 +3226,34 @@ sub modifystudent {
     # This will cause &modify_student_enrollment to get the uid from the
     # students environment
     $uid = undef if (!$forceid);
-    $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
-                                        $last,$gene,$usec,$end,$start);
+    $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
+					$gene,$usec,$end,$start,$type,$cid);
     return $reply;
 }
 
 sub modify_student_enrollment {
-    my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
-    # Get the course id from the environment
-    my $cid='';
-    unless ($cid=$ENV{'request.course.id'}) {
-	return 'not_in_class';
+    my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
+	$cid) = @_;
+    my ($cdom,$cnum,$chome);
+    if (!$cid) {
+	unless ($cid=$ENV{'request.course.id'}) {
+	    return 'not_in_class';
+	}
+	$cdom=$ENV{'course.'.$cid.'.domain'};
+	$cnum=$ENV{'course.'.$cid.'.num'};
+    } else {
+	($cdom,$cnum)=split(/_/,$cid);
+    }
+    $chome=$ENV{'course.'.$cid.'.home'};
+    if (!$chome) {
+	$chome=&homeserver($cnum,$cdom);
     }
+    if (!$chome) { return 'unknown_course'; }
     # Make sure the user exists
     my $uhome=&homeserver($uname,$udom);
     if (($uhome eq '') || ($uhome eq 'no_host')) { 
 	return 'error: no such user';
     }
-    #
     # Get student data if we were not given enough information
     if (!defined($first)  || $first  eq '' || 
         !defined($last)   || $last   eq '' || 
@@ -3181,9 +3266,9 @@ sub modify_student_enrollment {
                        ['firstname','middlename','lastname', 'generation','id']
                        ,$udom,$uname);
 
-        foreach (keys(%tmp)) {
-            &logthis("key $_ = ".$tmp{$_});
-        }
+        #foreach (keys(%tmp)) {
+        #    &logthis("key $_ = ".$tmp{$_});
+        #}
         $first  = $tmp{'firstname'}  if (!defined($first)  || $first  eq '');
         $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
         $last   = $tmp{'lastname'}   if (!defined($last)   || $last eq '');
@@ -3192,11 +3277,9 @@ sub modify_student_enrollment {
     }
     my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
                                                            $first,$middle);
-    my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
-	              $ENV{'course.'.$cid.'.num'}.':classlist:'.
-                      &escape($uname.':'.$udom).'='.
-                      &escape(join(':',$end,$start,$uid,$usec,$fullname)),
-	              $ENV{'course.'.$cid.'.home'});
+    my $value=&escape($uname.':'.$udom).'='.
+	&escape(join(':',$end,$start,$uid,$usec,$fullname,$type));
+    my $reply=critical('put:'.$cdom.':'.$cnum.':classlist:'.$value,$chome);
     unless (($reply eq 'ok') || ($reply eq 'delayed')) {
 	return 'error: '.$reply;
     }
@@ -3688,10 +3771,8 @@ sub EXT {
 		my $hashid="$udom:$uname";
 		my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
 						'userres');
-		if (!defined($cached)) { 
-		    my %resourcedata=&get('resourcedata',
-					  [$courselevelr,$courselevelm,
-					   $courselevel],$udom,$uname);
+		if (!defined($cached)) {
+		    my %resourcedata=&dump('resourcedata',$udom,$uname);
 		    $result=\%resourcedata;
 		    &do_cache(\%userresdatacache,$hashid,$result,'userres');
 		}
@@ -3704,12 +3785,13 @@ sub EXT {
 		    if ($$result{$courselevel}) {
 			return $$result{$courselevel}; }
 		} else {
-		    if ($tmp!~/No such file/) {
+		    #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:No such file/) {
+		    } elsif ($tmp=~/error: 2 /) {
                         &EXT_cache_set($udom,$uname);
 		    } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
 			return $tmp;
@@ -3791,9 +3873,12 @@ sub packages_tab_default {
     my $packages=&metadata($uri,'packages');
     foreach my $package (split(/,/,$packages)) {
 	my ($pack_type,$pack_part)=split(/_/,$package,2);
-	if ($pack_part eq $part) {
+	if (defined($packagetab{"$pack_type&$name&default"})) {
 	    return $packagetab{"$pack_type&$name&default"};
 	}
+	if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
+	    return $packagetab{$pack_type."_".$pack_part."&$name&default"};
+	}
     }
     return undef;
 }
@@ -3822,8 +3907,8 @@ sub metadata {
     # if it is a non metadata possible uri return quickly
     if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
         ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
-	($uri =~ m|home/[^/]+/public_html/|)) {
-	return '';
+	($uri =~ m|home/[^/]+/public_html/|) || ($uri =~ m|^uploaded/|)) {
+	return undef;
     }
     my $filename=$uri;
     $uri=~s/\.meta$//;
@@ -3840,7 +3925,9 @@ sub metadata {
 #
 # Is this a recursive call for a library?
 #
-	my %lcmetacache;
+	if (! exists($metacache{$uri})) {
+	    $metacache{$uri}={};
+	}
         if ($liburi) {
 	    $liburi=&declutter($liburi);
             $filename=$liburi;
@@ -3864,10 +3951,10 @@ sub metadata {
 		    if (defined($token->[2]->{'id'})) { 
 			$keyroot.='_'.$token->[2]->{'id'}; 
 		    }
-		    if ($lcmetacache{':packages'}) {
-			$lcmetacache{':packages'}.=','.$package.$keyroot;
+		    if ($metacache{$uri}->{':packages'}) {
+			$metacache{$uri}->{':packages'}.=','.$package.$keyroot;
 		    } else {
-			$lcmetacache{':packages'}=$package.$keyroot;
+			$metacache{$uri}->{':packages'}=$package.$keyroot;
 		    }
 		    foreach (keys %packagetab) {
 			my $part=$keyroot;
@@ -3889,14 +3976,14 @@ sub metadata {
 			    if ($subp eq 'display') {
 				$value.=' [Part: '.$part.']';
 			    }
-			    $lcmetacache{':'.$unikey.'.part'}=$part;
+			    $metacache{$uri}->{':'.$unikey.'.part'}=$part;
 			    $metathesekeys{$unikey}=1;
-			    unless (defined($lcmetacache{':'.$unikey.'.'.$subp})) {
-				$lcmetacache{':'.$unikey.'.'.$subp}=$value;
+			    unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
+				$metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
 			    }
-			    if (defined($lcmetacache{':'.$unikey.'.default'})) {
-				$lcmetacache{':'.$unikey}=
-				    $lcmetacache{':'.$unikey.'.default'};
+			    if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
+				$metacache{$uri}->{':'.$unikey}=
+				    $metacache{$uri}->{':'.$unikey.'.default'};
 			    }
 			}
 		    }
@@ -3929,6 +4016,7 @@ sub metadata {
 			    foreach (sort(split(/\,/,&metadata($uri,'keys',
 							       $location,$unikey,
 							       $depthcount+1)))) {
+				$metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
 				$metathesekeys{$_}=1;
 			    }
 			}
@@ -3939,18 +4027,18 @@ sub metadata {
 			}
 			$metathesekeys{$unikey}=1;
 			foreach (@{$token->[3]}) {
-			    $lcmetacache{':'.$unikey.'.'.$_}=$token->[2]->{$_};
+			    $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
 			}
 			my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
-			my $default=$lcmetacache{':'.$unikey.'.default'};
+			my $default=$metacache{$uri}->{':'.$unikey.'.default'};
 			if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
 		 # only ws inside the tag, and not in default, so use default
 		 # as value
-			    $lcmetacache{':'.$unikey}=$default;
+			    $metacache{$uri}->{':'.$unikey}=$default;
 			} else {
 		  # either something interesting inside the tag or default
                   # uninteresting
-			    $lcmetacache{':'.$unikey}=$internaltext;
+			    $metacache{$uri}->{':'.$unikey}=$internaltext;
 			}
 # end of not-a-package not-a-library import
 		    }
@@ -3960,27 +4048,28 @@ sub metadata {
 	    }
 	}
 # are there custom rights to evaluate
-	if ($lcmetacache{':copyright'} eq 'custom') {
+	if ($metacache{$uri}->{':copyright'} eq 'custom') {
 
     #
     # Importing a rights file here
     #
 	    unless ($depthcount) {
-		my $location=$lcmetacache{':customdistributionfile'};
+		my $location=$metacache{$uri}->{':customdistributionfile'};
 		my $dir=$filename;
 		$dir=~s|[^/]*$||;
 		$location=&filelocation($dir,$location);
 		foreach (sort(split(/\,/,&metadata($uri,'keys',
 						   $location,'_rights',
 						   $depthcount+1)))) {
+		    $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
 		    $metathesekeys{$_}=1;
 		}
 	    }
 	}
-	$lcmetacache{':keys'}=join(',',keys %metathesekeys);
-	&metadata_generate_part0(\%metathesekeys,\%lcmetacache,$uri);
-	$lcmetacache{':allpossiblekeys'}=join(',',keys %metathesekeys);
-	&do_cache(\%metacache,$uri,\%lcmetacache,'meta');
+	$metacache{$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');
 # this is the end of "was not already recently cached
     }
     return $metacache{$uri}->{':'.$what};
@@ -4367,49 +4456,83 @@ sub setup_random_from_rndseed {
     }
 }
 
+sub latest_receipt_algorithm_id {
+    return 'receipt2';
+}
+
 sub ireceipt {
-    my ($funame,$fudom,$fucourseid,$fusymb)=@_;
+    my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
     my $cuname=unpack("%32C*",$funame);
     my $cudom=unpack("%32C*",$fudom);
     my $cucourseid=unpack("%32C*",$fucourseid);
     my $cusymb=unpack("%32C*",$fusymb);
     my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
-    return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
-           ($cunique%$cuname+
-            $cunique%$cudom+
-            $cusymb%$cuname+
-            $cusymb%$cudom+
-            $cucourseid%$cuname+
-            $cucourseid%$cudom);
+    my $cpart=unpack("%32S*",$part);
+    my $return =unpack("%32C*",$perlvar{'lonHostID'}).'-';
+    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));
+			       
+	$return.= ($cunique%$cuname+
+		   $cunique%$cudom+
+		   $cusymb%$cuname+
+		   $cusymb%$cudom+
+		   $cucourseid%$cuname+
+		   $cucourseid%$cudom+
+		   $cpart%$cuname+
+		   $cpart%$cudom);
+    } else {
+	$return.= ($cunique%$cuname+
+		   $cunique%$cudom+
+		   $cusymb%$cuname+
+		   $cusymb%$cudom+
+		   $cucourseid%$cuname+
+		   $cucourseid%$cudom);
+    }
+    return $return;
 }
 
 sub receipt {
-  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-  return &ireceipt($name,$domain,$courseid,$symb);
+    my ($part)=@_;
+    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+    return &ireceipt($name,$domain,$courseid,$symb,$part);
 }
 
 # ------------------------------------------------------------ Serves up a file
-# returns either the contents of the file or a -1
+# returns either the contents of the file or 
+# -1 if the file doesn't exist
+# -2 if an error occured when trying to aqcuire the file
+
 sub getfile {
- my $file=shift;
- if ($file=~/^\/*uploaded\//) { # user file
-    my $ua=new LWP::UserAgent;
-    my $request=new HTTP::Request('GET',&tokenwrapper($file));
-    my $response=$ua->request($request);
-    if ($response->is_success()) {
-       return $response->content;
-    } else { 
-       return -1; 
-    }
- } else { # normal file from res space
-  &repcopy($file);
-  if (! -e $file ) { return -1; };
-  my $fh;
-  open($fh,"<$file");
-  my $a='';
-  while (<$fh>) { $a .=$_; }
-  return $a;
- }
+    my $file=shift;
+    if ($file=~/^\/*uploaded\//) { # user file
+	my $ua=new LWP::UserAgent;
+	my $request=new HTTP::Request('GET',&tokenwrapper($file));
+	my $response=$ua->request($request);
+	if ($response->is_success()) {
+	    return $response->content;
+	} else { 
+	    #&logthis("Return Code is ".$response->code." for $file ".
+	    #         &tokenwrapper($file));
+	    # 500 for ISE when tokenwrapper can't figure out what server to
+            #  contact
+            # 503 when lonuploadacc can't contact the requested server
+	    if ($response->code eq 503 || $response->code eq 500) {
+		return -2;
+	    } else {
+		return -1;
+	    }
+	}
+    } else { # normal file from res space
+	&repcopy($file);
+	if (! -e $file ) { return -1; };
+	my $fh;
+	open($fh,"<$file");
+	my $a='';
+	while (<$fh>) { $a .=$_; }
+	return $a;
+    }
 }
 
 sub filelocation {
@@ -4423,7 +4546,7 @@ sub filelocation {
     $location=$file;
   } else {
     $file=~s/^$perlvar{'lonDocRoot'}//;
-    $file=~s:^/*res::;
+    $file=~s:^/res/:/:;
     if ( !( $file =~ m:^/:) ) {
       $location = $dir. '/'.$file;
     } else {
@@ -4432,19 +4555,47 @@ sub filelocation {
   }
   $location=~s://+:/:g; # remove duplicate /
   while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
+  while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
   return $location;
 }
 
 sub hreflocation {
     my ($dir,$file)=@_;
-    unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
-       my $finalpath=filelocation($dir,$file);
-       $finalpath=~s/^\/home\/httpd\/html//;
-       $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
-       return $finalpath;
-    } else {
-       return $file;
+    unless (($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=~s-^/home/(\w+)/public_html/-/~$1/-;
+	return $file;
+    }
+    return $file;
+}
+
+sub current_machine_domains {
+    my $hostname=$hostname{$perlvar{'lonHostID'}};
+    my @domains;
+    while( my($id, $name) = each(%hostname)) {
+#	&logthis("-$id-$name-$hostname-");
+	if ($hostname eq $name) {
+	    push(@domains,$hostdom{$id});
+	}
+    }
+    return @domains;
+}
+
+sub current_machine_ids {
+    my $hostname=$hostname{$perlvar{'lonHostID'}};
+    my @ids;
+    while( my($id, $name) = each(%hostname)) {
+#	&logthis("-$id-$name-$hostname-");
+	if ($hostname eq $name) {
+	    push(@ids,$id);
+	}
     }
+    return @ids;
 }
 
 # ------------------------------------------------------------- Declutters URLs