--- loncom/lonnet/perl/lonnet.pm	2002/06/27 21:11:44	1.249
+++ loncom/lonnet/perl/lonnet.pm	2002/09/03 01:29:35	1.267.4.5
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.249 2002/06/27 21:11:44 www Exp $
+# $Id: lonnet.pm,v 1.267.4.5 2002/09/03 01:29:35 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -608,6 +608,18 @@ sub userenvironment {
     return %returnhash;
 }
 
+# -------------------------------------------------------------------- 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.'.$ENV{'request.course.id'}.'.home'};
+    &reply('chatsend:'.$cdom.':'.$cnum.':'.
+	   &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
+		   &escape($newentry)),$chome);
+}
+
 # ----------------------------- Subscribe to a resource, return URL if possible
 
 sub subscribe {
@@ -708,6 +720,75 @@ sub ssi {
     return $response->content;
 }
 
+# ------- Add a token to a remote URI's query string to vouch for access rights
+
+sub tokenwrapper {
+    my $uri=shift;
+    $uri=~s/^http\:\/\/([^\/]+)//;
+    $uri=~s/^\///;
+    $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
+    my $token=$1;
+    if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
+	&appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
+        return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
+               (($uri=~/\?/)?'&':'?').'token='.$token;
+    } else {
+	return '/adm/notfound.html';
+    }
+}
+    
+# --------------- 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 userfileupload {
+    my ($formname,$coursedoc)=@_;
+    my $fname=$ENV{'form.'.$formname.'.filename'};
+    $fname=~s/\\/\//g;
+    $fname=~s/^.*\/([^\/]+)$/$1/;
+    unless ($fname) { return 'error: no uploaded file'; }
+    chop($ENV{'form.'.$formname});
+# Create the directory if not present
+    my $docuname='';
+    my $docudom='';
+    my $docuhome='';
+    if ($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'};
+    } else {
+        $docuname=$ENV{'user.name'};
+        $docudom=$ENV{'user.domain'};
+        $docuhome=$ENV{'user.home'};
+    }
+    my $path=$docudom.'/'.$docuname.'/';
+    my $filepath=$perlvar{'lonDocRoot'};
+    my @parts=split(/\//,$filepath.'/userfiles/'.$path);
+    my $count;
+    for ($count=4;$count<=$#parts;$count++) {
+        $filepath.="/$parts[$count]";
+        if ((-e $filepath)!=1) {
+	    mkdir($filepath,0777);
+        }
+    }
+# Save the file
+    {
+       my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
+       print $fh $ENV{'form.'.$formname};
+    }
+# Notify homeserver to grep it
+#
+    if 
+(&reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome) eq 'ok') 
+    {
+#
+# Return the URL to it
+        return '/uploaded/'.$path.$fname;
+    } else {
+        return '/adm/notfound.html';
+    }    
+}
+
 # ------------------------------------------------------------------------- Log
 
 sub log {
@@ -739,7 +820,7 @@ sub flushcourselogs {
         my $entry=$_;
         $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
         my %temphash=($entry => $accesshash{$entry});
-        if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
+        if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
 	    delete $accesshash{$entry};
         }
     }
@@ -919,97 +1000,195 @@ sub devalidate {
     }
 }
 
+sub get_scalar {
+    my ($string,$end) = @_;
+    my $value;
+    if ($$string =~ s/^([^&]*?)($end)/$2/) {
+	$value = $1;
+    } elsif ($$string =~ s/^([^&]*?)&//) {
+	$value = $1;
+    }
+    return &unescape($value);
+}
+
+sub array2str {
+  my (@array) = @_;
+  my $result=&arrayref2str(\@array);
+  $result=~s/^__ARRAY_REF__//;
+  $result=~s/__END_ARRAY_REF__$//;
+  return $result;
+}
+
 sub arrayref2str {
   my ($arrayref) = @_;
-  my $result='_ARRAY_REF__';
+  my $result='__ARRAY_REF__';
   foreach my $elem (@$arrayref) {
-    if (ref($elem) eq 'ARRAY') {
-      $result.=&escape(&arrayref2str($elem)).'&';
-    } elsif (ref($elem) eq 'HASH') {
-      $result.=&escape(&hashref2str($elem)).'&';
-    } elsif (ref($elem)) {
-      &logthis("Got a ref of ".(ref($elem))." skipping.");
+    if(ref($elem) eq 'ARRAY') {
+      $result.=&arrayref2str($elem).'&';
+    } elsif(ref($elem) eq 'HASH') {
+      $result.=&hashref2str($elem).'&';
+    } elsif(ref($elem)) {
+      #print("Got a ref of ".(ref($elem))." skipping.");
     } else {
       $result.=&escape($elem).'&';
     }
   }
   $result=~s/\&$//;
+  $result .= '__END_ARRAY_REF__';
   return $result;
 }
 
 sub hash2str {
   my (%hash) = @_;
   my $result=&hashref2str(\%hash);
-  $result=~s/^_HASH_REF__//;
+  $result=~s/^__HASH_REF__//;
+  $result=~s/__END_HASH_REF__$//;
   return $result;
 }
 
 sub hashref2str {
   my ($hashref)=@_;
-  my $result='_HASH_REF__';
+  my $result='__HASH_REF__';
   foreach (keys(%$hashref)) {
     if (ref($_) eq 'ARRAY') {
-      $result.=&escape(&arrayref2str($_)).'=';
+      $result.=&arrayref2str($_).'=';
     } elsif (ref($_) eq 'HASH') {
-      $result.=&escape(&hashref2str($_)).'=';
+      $result.=&hashref2str($_).'=';
     } elsif (ref($_)) {
-      &logthis("Got a ref of ".(ref($_))." skipping.");
+      $result.='=';
+      #print("Got a ref of ".(ref($_))." skipping.");
     } else {
-      $result.=&escape($_).'=';
+	if ($_) {$result.=&escape($_).'=';} else { last; }
     }
 
-    if (ref($$hashref{$_}) eq 'ARRAY') {
-      $result.=&escape(&arrayref2str($$hashref{$_})).'&';
-    } elsif (ref($$hashref{$_}) eq 'HASH') {
-      $result.=&escape(&hashref2str($$hashref{$_})).'&';
-    } elsif (ref($$hashref{$_})) {
-      &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
+    if(ref($hashref->{$_}) eq 'ARRAY') {
+      $result.=&arrayref2str($hashref->{$_}).'&';
+    } elsif(ref($hashref->{$_}) eq 'HASH') {
+      $result.=&hashref2str($hashref->{$_}).'&';
+    } elsif(ref($hashref->{$_})) {
+       $result.='&';
+      #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
     } else {
-      $result.=&escape($$hashref{$_}).'&';
+      $result.=&escape($hashref->{$_}).'&';
     }
   }
   $result=~s/\&$//;
+  $result .= '__END_HASH_REF__';
   return $result;
 }
 
 sub str2hash {
+    my ($string)=@_;
+    my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
+    return %$hash;
+}
+
+sub str2hashref {
   my ($string) = @_;
-  my %returnhash;
-  foreach (split(/\&/,$string)) {
-    my ($name,$value)=split(/\=/,$_);
-    $name=&unescape($name);
-    $value=&unescape($value);
-    if ($value =~ /^_HASH_REF__/) {
-      $value =~ s/^_HASH_REF__//;
-      my %hash=&str2hash($value);
-      $value=\%hash;
-    } elsif ($value =~ /^_ARRAY_REF__/) {
-      $value =~ s/^_ARRAY_REF__//;
-      my @array=&str2array($value);
-      $value=\@array;
-    }
-    $returnhash{$name}=$value;
+
+  my %hash;
+
+  if($string !~ /^__HASH_REF__/) {
+      if (! ($string eq '' || !defined($string))) {
+	  $hash{'error'}='Not hash reference';
+      }
+      return (\%hash, $string);
   }
-  return (%returnhash);
+
+  $string =~ s/^__HASH_REF__//;
+
+  while($string !~ /^__END_HASH_REF__/) {
+      #key
+      my $key='';
+      if($string =~ /^__HASH_REF__/) {
+          ($key, $string)=&str2hashref($string);
+          if(defined($key->{'error'})) {
+              $hash{'error'}='Bad data';
+              return (\%hash, $string);
+          }
+      } elsif($string =~ /^__ARRAY_REF__/) {
+          ($key, $string)=&str2arrayref($string);
+          if($key->[0] eq 'Array reference error') {
+              $hash{'error'}='Bad data';
+              return (\%hash, $string);
+          }
+      } else {
+          $string =~ s/^(.*?)=//;
+	  $key=&unescape($1);
+      }
+      $string =~ s/^=//;
+
+      #value
+      my $value='';
+      if($string =~ /^__HASH_REF__/) {
+          ($value, $string)=&str2hashref($string);
+          if(defined($value->{'error'})) {
+              $hash{'error'}='Bad data';
+              return (\%hash, $string);
+          }
+      } elsif($string =~ /^__ARRAY_REF__/) {
+          ($value, $string)=&str2arrayref($string);
+          if($value->[0] eq 'Array reference error') {
+              $hash{'error'}='Bad data';
+              return (\%hash, $string);
+          }
+      } else {
+	  $value=&get_scalar(\$string,'__END_HASH_REF__');
+      }
+      $string =~ s/^&//;
+
+      $hash{$key}=$value;
+  }
+
+  $string =~ s/^__END_HASH_REF__//;
+
+  return (\%hash, $string);
 }
 
 sub str2array {
+    my ($string)=@_;
+    my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
+    return @$array;
+}
+
+sub str2arrayref {
   my ($string) = @_;
-  my @returnarray;
-  foreach my $value (split(/\&/,$string)) {
-    $value=&unescape($value);
-    if ($value =~ /^_HASH_REF__/) {
-      $value =~ s/^_HASH_REF__//;
-      my %hash=&str2hash($value);
-      $value=\%hash;
-    } elsif ($value =~ /^_ARRAY_REF__/) {
-      $value =~ s/^_ARRAY_REF__//;
-      my @array=&str2array($value);
-      $value=\@array;
-    }
-    push(@returnarray,$value);
+  my @array;
+
+  if($string !~ /^__ARRAY_REF__/) {
+      if (! ($string eq '' || !defined($string))) {
+	  $array[0]='Array reference error';
+      }
+      return (\@array, $string);
+  }
+
+  $string =~ s/^__ARRAY_REF__//;
+
+  while($string !~ /^__END_ARRAY_REF__/) {
+      my $value='';
+      if($string =~ /^__HASH_REF__/) {
+          ($value, $string)=&str2hashref($string);
+          if(defined($value->{'error'})) {
+              $array[0] ='Array reference error';
+              return (\@array, $string);
+          }
+      } elsif($string =~ /^__ARRAY_REF__/) {
+          ($value, $string)=&str2arrayref($string);
+          if($value->[0] eq 'Array reference error') {
+              $array[0] ='Array reference error';
+              return (\@array, $string);
+          }
+      } else {
+	  $value=&get_scalar(\$string,'__END_ARRAY_REF__');
+      }
+      $string =~ s/^&//;
+
+      push(@array, $value);
   }
-  return (@returnarray);
+
+  $string =~ s/^__END_ARRAY_REF__//;
+
+  return (\@array, $string);
 }
 
 # -------------------------------------------------------------------Temp Store
@@ -1033,7 +1212,7 @@ sub tmpreset {
   my %hash;
   if (tie(%hash,'GDBM_File',
 	  $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
-	  &GDBM_WRCREAT,0640)) {
+	  &GDBM_WRCREAT(),0640)) {
     foreach my $key (keys %hash) {
       if ($key=~ /:$symb/) {
 	delete($hash{$key});
@@ -1069,7 +1248,7 @@ sub tmpstore {
   my $path=$perlvar{'lonDaemons'}.'/tmp';
   if (tie(%hash,'GDBM_File',
 	  $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
-	  &GDBM_WRCREAT,0640)) {
+	  &GDBM_WRCREAT(),0640)) {
     $hash{"version:$symb"}++;
     my $version=$hash{"version:$symb"};
     my $allkeys=''; 
@@ -1113,7 +1292,7 @@ sub tmprestore {
   my $path=$perlvar{'lonDaemons'}.'/tmp';
   if (tie(%hash,'GDBM_File',
 	  $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
-	  &GDBM_READER,0640)) {
+	  &GDBM_READER(),0640)) {
     my $version=$hash{"version:$symb"};
     $returnhash{'version'}=$version;
     my $scope;
@@ -1516,6 +1695,17 @@ sub allowed {
 		return '';
             }
         }
+        if ($ENV{'request.role'}=~ /li\.\//) {
+            # Library role, so allow browsing of resources in this domain.
+            return 'F';
+        }
+    }
+    # Domain coordinator is trying to create a course
+    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'});
     }
 
     my $thisallowed='';
@@ -1947,7 +2137,8 @@ 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'});  
+             $umode.' by '.$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'},
@@ -1978,7 +2169,8 @@ sub modifyuser {
 	     $last.', '.$gene.'(forceid: '.$forceid.')'.
              (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
                                      ' desiredhome not specified'). 
-             ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
+             ' by '.$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') && ($umode) && ($upass)) {
@@ -2103,13 +2295,10 @@ sub writecoursepref {
 # ---------------------------------------------------------- Make/modify course
 
 sub createcourse {
-    my ($udom,$description,$url)=@_;
+    my ($udom,$description,$url,$course_server)=@_;
     $url=&declutter($url);
     my $cid='';
-    unless (&allowed('ccc',$ENV{'user.domain'})) {
-        return 'refused';
-    }
-    unless ($udom eq $ENV{'user.domain'}) {
+    unless (&allowed('ccc',$udom)) {
         return 'refused';
     }
 # ------------------------------------------------------------------- Create ID
@@ -2125,9 +2314,14 @@ sub createcourse {
            return 'error: unable to generate unique course-ID';
        } 
    }
+# ------------------------------------------------ Check supplied server name
+    $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
+    if (! exists($libserv{$course_server})) {
+        return 'error:bad server name '.$course_server;
+    }
 # ------------------------------------------------------------- Make the course
     my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
-                      $ENV{'user.home'});
+                      $course_server);
     unless ($reply eq 'ok') { return 'error: '.$reply; }
     $uhome=&homeserver($uname,$udom,'true');
     if (($uhome eq '') || ($uhome eq 'no_host')) { 
@@ -2166,51 +2360,98 @@ sub revokecustomrole {
 # ------------------------------------------------------------ Directory lister
 
 sub dirlist {
-    my $uri=shift;
+    my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
+
     $uri=~s/^\///;
     $uri=~s/\/$//;
-    my ($res,$udom,$uname,@rest)=split(/\//,$uri);
-    if ($udom) {
-     if ($uname) {
-       my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
-                      homeserver($uname,$udom));
-       return split(/:/,$listing);
-     } else {
-       my $tryserver;
-       my %allusers=();
-       foreach $tryserver (keys %libserv) {
-	  if ($hostdom{$tryserver} eq $udom) {
-             my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
-			       $tryserver);
-             if (($listing ne 'no_such_dir') && ($listing ne 'empty')
-              && ($listing ne 'con_lost')) {
-                foreach (split(/:/,$listing)) {
-                  my ($entry,@stat)=split(/&/,$_);
-                  $allusers{$entry}=1;
+    my ($udom, $uname);
+    (undef,$udom,$uname)=split(/\//,$uri);
+    if(defined($userdomain)) {
+        $udom = $userdomain;
+    }
+    if(defined($username)) {
+        $uname = $username;
+    }
+
+    my $dirRoot = $perlvar{'lonDocRoot'};
+    if(defined($alternateDirectoryRoot)) {
+        $dirRoot = $alternateDirectoryRoot;
+        $dirRoot =~ s/\/$//;
+    }
+
+    if($udom) {
+        if($uname) {
+            my $listing=reply('ls:'.$dirRoot.'/'.$uri,
+                              homeserver($uname,$udom));
+            return split(/:/,$listing);
+        } elsif(!defined($alternateDirectoryRoot)) {
+            my $tryserver;
+            my %allusers=();
+            foreach $tryserver (keys %libserv) {
+                if($hostdom{$tryserver} eq $udom) {
+                    my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
+                                      $udom, $tryserver);
+                    if (($listing ne 'no_such_dir') && ($listing ne 'empty')
+                        && ($listing ne 'con_lost')) {
+                        foreach (split(/:/,$listing)) {
+                            my ($entry,@stat)=split(/&/,$_);
+                            $allusers{$entry}=1;
+                        }
+                    }
                 }
-             }
-	  }
-       }
-       my $alluserstr='';
-       foreach (sort keys %allusers) {
-           $alluserstr.=$_.'&user:';
-       }
-       $alluserstr=~s/:$//;
-       return split(/:/,$alluserstr);
-     } 
-   } else {
-       my $tryserver;
-       my %alldom=();
-       foreach $tryserver (keys %libserv) {
-	   $alldom{$hostdom{$tryserver}}=1;
-       }
-       my $alldomstr='';
-       foreach (sort keys %alldom) {
-          $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
-       }
-       $alldomstr=~s/:$//;
-       return split(/:/,$alldomstr);       
-   }
+            }
+            my $alluserstr='';
+            foreach (sort keys %allusers) {
+                $alluserstr.=$_.'&user:';
+            }
+            $alluserstr=~s/:$//;
+            return split(/:/,$alluserstr);
+        } else {
+            my @emptyResults = ();
+            push(@emptyResults, 'missing user name');
+            return split(':',@emptyResults);
+        }
+    } elsif(!defined($alternateDirectoryRoot)) {
+        my $tryserver;
+        my %alldom=();
+        foreach $tryserver (keys %libserv) {
+            $alldom{$hostdom{$tryserver}}=1;
+        }
+        my $alldomstr='';
+        foreach (sort keys %alldom) {
+            $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
+        }
+        $alldomstr=~s/:$//;
+        return split(/:/,$alldomstr);       
+    } else {
+        my @emptyResults = ();
+        push(@emptyResults, 'missing domain');
+        return split(':',@emptyResults);
+    }
+}
+
+# --------------------------------------------- GetFileTimestamp
+# This function utilizes dirlist and returns the date stamp for
+# when it was last modified.  It will also return an error of -1
+# if an error occurs
+
+sub GetFileTimestamp {
+    my ($studentDomain,$studentName,$filename,$root)=@_;
+    $studentDomain=~s/\W//g;
+    $studentName=~s/\W//g;
+    my $subdir=$studentName.'__';
+    $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
+    my $proname="$studentDomain/$subdir/$studentName";
+    $proname .= '/'.$filename;
+    my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
+                                       $root);
+    my $fileStat = $dir[0];
+    my @stats = split('&', $fileStat);
+    if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
+        return $stats[9];
+    } else {
+        return -1;
+    }
 }
 
 # -------------------------------------------------------- Value of a Condition
@@ -2271,30 +2512,26 @@ sub courseresdata {
     my ($coursenum,$coursedomain,@which)=@_;
     my $coursehom=&homeserver($coursenum,$coursedomain);
     my $hashid=$coursenum.':'.$coursedomain;
-    unless (defined($courseresdatacache{$hashid.'.time'})) {
-	unless (time-$courseresdatacache{$hashid.'.time'}<300) {
-           my $coursehom=&homeserver($coursenum,$coursedomain);
-           if ($coursehom) {
-              my $dumpreply=&reply('dump:'.$coursedomain.':'.$coursenum.
-			     ':resourcedata:.',$coursehom);
-	      unless ($dumpreply=~/^error\:/) {
-	         $courseresdatacache{$hashid.'.time'}=time;
-                 $courseresdatacache{$hashid}=$dumpreply;
-	     }
-	  }
-       }
+    my $dodump=0;
+    if (!defined($courseresdatacache{$hashid.'.time'})) {
+	$dodump=1;
+    } else {
+	if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
     }
-   my @pairs=split(/\&/,$courseresdatacache{$hashid});
-   my %returnhash=();
-   foreach (@pairs) {
-      my ($key,$value)=split(/=/,$_);
-      $returnhash{unescape($key)}=unescape($value);
-   }
-    my $item;
-   foreach $item (@which) {
-       if ($returnhash{$item}) { return $returnhash{$item}; }
-   }
-   return '';
+    if ($dodump) {
+	my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
+	my ($tmp) = keys(%dumpreply);
+	if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
+	    $courseresdatacache{$hashid.'.time'}=time;
+	    $courseresdatacache{$hashid}=\%dumpreply;
+	}
+    }
+    foreach my $item (@which) {
+	if ($courseresdatacache{$hashid}->{$item}) {
+	    return $courseresdatacache{$hashid}->{$item};
+	}
+    }
+    return '';
 }
 
 # --------------------------------------------------------- Value of a Variable
@@ -2399,7 +2636,7 @@ sub EXT {
 	    my $section;
 	    if (($ENV{'user.name'} eq $uname) &&
 		($ENV{'user.domain'} eq $udom)) {
-		$section={'request.course.sec'};
+		$section=$ENV{'request.course.sec'};
 	    } else {
 		$section=&usection($udom,$uname,$courseid);
 	    }
@@ -2448,7 +2685,7 @@ sub EXT {
 	    my $thisparm='';
 	    if (tie(%parmhash,'GDBM_File',
 		    $ENV{'request.course.fn'}.'_parms.db',
-		    &GDBM_READER,0640)) {
+		    &GDBM_READER(),0640)) {
 		$thisparm=$parmhash{$symbparm};
 		untie(%parmhash);
 	    }
@@ -2509,7 +2746,7 @@ sub metadata {
 # Look at timestamp of caching
 # Everything is cached by the main uri, libraries are never directly cached
 #
-    unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
+    unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
 #
 # Is this a recursive call for a library?
 #
@@ -2532,7 +2769,7 @@ sub metadata {
 	      my $package=$token->[2]->{'package'};
 	      my $keyroot='';
               if ($prefix) {
-		  $keyroot.='_'.$prefix;
+		  $keyroot.=$prefix;
               } else {
                 if (defined($token->[2]->{'part'})) { 
                    $keyroot.='_'.$token->[2]->{'part'}; 
@@ -2590,12 +2827,14 @@ sub metadata {
 #
 # Importing a library here
 #                
-		 if (defined($depthcount)) { $depthcount++; } else 
-                                           { $depthcount=0; }
                  if ($depthcount<20) {
-		     foreach (split(/\,/,&metadata($uri,'keys',
-                                  $parser->get_text('/import'),$unikey,
-                                  $depthcount))) {
+		     my $location=$parser->get_text('/import');
+		     my $dir=$filename;
+		     $dir=~s|[^/]*$||;
+		     $location=&filelocation($dir,$location);
+		     foreach (sort(split(/\,/,&metadata($uri,'keys',
+							$location,$unikey,
+							$depthcount+1)))) {
                          $metathesekeys{$_}=1;
 		     }
 		 }
@@ -2621,12 +2860,42 @@ sub metadata {
 	 }
        }
        $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
+	&metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
+       $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
        $metacache{$uri.':cachedtimestamp'}=time;
 # this is the end of "was not already recently cached
     }
     return $metacache{$uri.':'.$what};
 }
 
+sub metadata_generate_part0 {
+    my ($metadata,$metacache,$uri) = @_;
+    my %allnames;
+    foreach my $metakey (sort keys %$metadata) {
+	if ($metakey=~/^parameter\_(.*)/) {
+	  my $part=$$metacache{$uri.':'.$metakey.'.part'};
+	  my $name=$$metacache{$uri.':'.$metakey.'.name'};
+	  if (! exists($$metadata{'parameter_0_'.$name})) {
+	    $allnames{$name}=$part;
+	  }
+	}
+    }
+    foreach my $name (keys(%allnames)) {
+      $$metadata{"parameter_0_$name"}=1;
+      my $key="$uri:parameter_0_$name";
+      $$metacache{"$key.part"}='0';
+      $$metacache{"$key.name"}=$name;
+      $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
+					   $allnames{$name}.'_'.$name.
+					   '.type'};
+      my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
+			     '.display'};
+      my $expr='\\[Part: '.$allnames{$name}.'\\]';
+      $olddis=~s/$expr/\[Part: 0\]/;
+      $$metacache{"$key.display"}=$olddis;
+    }
+}
+
 # ------------------------------------------------- Update symbolic store links
 
 sub symblist {
@@ -2635,7 +2904,7 @@ sub symblist {
     my %hash;
     if (($ENV{'request.course.fn'}) && (%newhash)) {
         if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
-                      &GDBM_WRCREAT,0640)) {
+                      &GDBM_WRCREAT(),0640)) {
 	    foreach (keys %newhash) {
                 $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
             }
@@ -2663,7 +2932,7 @@ sub symbverify {
     my %bighash;
     my $okay=0;
     if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
-                            &GDBM_READER,0640)) {
+                            &GDBM_READER(),0640)) {
         my $ids=$bighash{'ids_/res/'.$thisfn};
         unless ($ids) { 
            $ids=$bighash{'ids_/'.$thisfn};
@@ -2717,7 +2986,7 @@ sub symbread {
     my $syval='';
     if (($ENV{'request.course.fn'}) && ($thisfn)) {
         if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
-                      &GDBM_READER,0640)) {
+                      &GDBM_READER(),0640)) {
 	    $syval=$hash{$thisfn};
             untie(%hash);
         }
@@ -2733,7 +3002,7 @@ sub symbread {
         } else {
 # ------------------------------------------------------- Was not in symb table
            if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
-                            &GDBM_READER,0640)) {
+                            &GDBM_READER(),0640)) {
 # ---------------------------------------------- Get ID(s) for current resource
               my $ids=$bighash{'ids_/res/'.$thisfn};
               unless ($ids) { 
@@ -2835,10 +3104,10 @@ sub ireceipt {
 }
 
 sub receipt {
-    return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
-                     $ENV{'request.course.id'},&symbread());
+  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+  return &ireceipt($name,$domain,$courseid,$symb);
 }
-  
+
 # ------------------------------------------------------------ Serves up a file
 # returns either the contents of the file or a -1
 sub getfile {
@@ -2952,13 +3221,17 @@ BEGIN {
     while (my $configline=<$config>) {
        chomp($configline);
        my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
-       $hostname{$id}=$name;
-       $hostdom{$id}=$domain;
-       $hostip{$id}=$ip;
-       if ($domdescr) {
-	   $domaindescription{$domain}=$domdescr;
+       if ($id && $domain && $role && $name && $ip) {
+	 $hostname{$id}=$name;
+	 $hostdom{$id}=$domain;
+	 $hostip{$id}=$ip;
+	 if ($domdescr) { $domaindescription{$domain}=$domdescr; }
+	 if ($role eq 'library') { $libserv{$id}=$name; }
+       } else {
+	 if ($configline) {
+	   &logthis("Skipping hosts.tab line -$configline-");
+	 }
        }
-       if ($role eq 'library') { $libserv{$id}=$name; }
     }
 }