loncom/lonnet/perl/lonnet.pm - diff

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Diff for /loncom/lonnet/perl/lonnet.pm between versions 1.243 and 1.363

-version 1.243, 2002/06/24 19:41:41
+version 1.363, 2003/04/18 13:47:55
  Line 47
  # 09/01 Guy Albertelli
  # 09/01,10/01,11/01 Gerd Kortemeyer
  # YEAR=2001
- # 02/27/01 Scott Harrison
  # 3/2 Gerd Kortemeyer
- # 3/15,3/19 Scott Harrison
  # 3/19,3/20 Gerd Kortemeyer
- # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
  # 5/26,5/28 Gerd Kortemeyer
  # 5/30 H. K. Ng
  # 6/1 Gerd Kortemeyer
  # July Guy Albertelli
  # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
  # 10/2 Gerd Kortemeyer
- # 10/5,10/10,11/13,11/15 Scott Harrison
  # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
  # 12/5 Matthew Hall
  # 12/5 Guy Albertelli
  # 12/6,12/7,12/12 Gerd Kortemeyer
- # 12/18 Scott Harrison
  # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
  # YEAR=2002
  # 1/4,2/4,2/7 Gerd Kortemeyer
- Line 77  use Apache::File;
+ Line 72  use Apache::File;
  use LWP::UserAgent();
  use HTTP::Headers;
  use vars
- qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom
+ qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
-    %libserv %pr %prp %metacache %packagetab
+    %libserv %pr %prp %metacache %packagetab %titlecache
-    %courselogs %accesshash $processmarker $dumpcount
+    %courselogs %accesshash %userrolehash $processmarker $dumpcount
-    %coursedombuf %coursehombuf %courseresdatacache);
+    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
+    %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
  use IO::Socket;
  use GDBM_File;
  use Apache::Constants qw(:common :http);
  use HTML::LCParser;
  use Fcntl qw(:flock);
+ use Apache::loncoursedata;
  my $readit;
  # --------------------------------------------------------------------- Logging
- Line 140  sub reply {
+ Line 138  sub reply {
      unless (defined($hostname{$server})) { return 'no_such_host'; }
      my $answer=subreply($cmd,$server);
      if ($answer eq 'con_lost') {
-        #sleep 5;
+         #sleep 5;
-        #$answer=subreply($cmd,$server);
+         #$answer=subreply($cmd,$server);
-        #if ($answer eq 'con_lost') {
+         #if ($answer eq 'con_lost') {
  	#   &logthis("Second attempt con_lost on $server");
          #   my $peerfile="$perlvar{'lonSockDir'}/$server";
          #   my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",
- Line 213  sub critical {
+ Line 211  sub critical {
              $middlename=substr($middlename,0,16);
              $middlename=~s/\W//g;
              my $dfilename=
-              "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
+       "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
+             $dumpcount++;
              {
               my $dfh;
               if ($dfh=Apache::File->new(">$dfilename")) {
- Line 348  sub delenv {
+ Line 347  sub delenv {
      return 'ok';
  }
+ # ------------------------------------------ Fight off request when overloaded
+ sub overloaderror {
+     my ($r,$checkserver)=@_;
+     unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
+     my $loadavg;
+     if ($checkserver eq $perlvar{'lonHostID'}) {
+        my $loadfile=Apache::File->new('/proc/loadavg');
+        $loadavg=<$loadfile>;
+        $loadavg =~ s/\s.*//g;
+        $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
+     } else {
+        $loadavg=&reply('load',$checkserver);
+     }
+     my $overload=$loadavg-100;
+     if ($overload>0) {
+ 	$r->err_headers_out->{'Retry-After'}=$overload;
+         $r->log_error('Overload of '.$overload.' on '.$checkserver);
+         return 413;
+     }
+     return '';
+ }
  # ------------------------------ Find server with least workload from spare.tab
  sub spareserver {
+     my $loadpercent = shift;
      my $tryserver;
      my $spareserver='';
-     my $lowestserver=100;
+     my $lowestserver=$loadpercent;
      foreach $tryserver (keys %spareid) {
         my $answer=reply('load',$tryserver);
         if (($answer =~ /\d/) && ($answer<$lowestserver)) {
- Line 565  sub idput {
+ Line 588  sub idput {
      }
  }
+ # --------------------------------------------------- Assign a key to a student
+ sub assign_access_key {
+     my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
+     $cdom=
+    $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+     $cnum=
+    $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
+     $udom=$ENV{'user.name'} unless (defined($udom));
+     $uname=$ENV{'user.domain'} unless (defined($uname));
+     my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
+     if (($existing{$ckey}=~/^\d+$/) || # has time - new key
+         ($existing{$ckey} eq $uname.':'.$udom)) { # this should not happen,
+                                                   # unless something went wrong
+                                                   # the first time around
+ # ready to assign
+     } elsif (!$existing{$ckey}) {
+         if (&put('accesskey',{$ckey=>$uname.':'.$udom},$cdom,$cnum) eq 'ok') {
+ # key now belongs to user
+ 	    my $envkey='key.'.$cdom.'_'.$cnum;
+             if (&put('environment',{$envkey => $ckey}) eq 'ok') {
+                 &appenv('environment.'.$envkey => $ckey);
+                 return 'ok';
+             } else {
+                 return
+   'error: Count not permanently assign key, will need to be re-entered later.';
+ 	    }
+         } else {
+             return 'error: Could not assign key, try again later.';
+         }
+ # the key does not exist
+ 	return 'error: The key does not exist';
+     } else {
+ # the key is somebody else's
+ 	return 'error: The key is already in use';
+     }
+ }
+ # ------------------------------------------------------ Generate a set of keys
+ sub generate_access_keys {
+     my ($number,$cdom,$cnum)=@_;
+     $cdom=
+    $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+     $cnum=
+    $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
+     unless (&allowed('mky',$cdom)) { return 0; }
+     unless (($cdom) && ($cnum)) { return 0; }
+     if ($number>10000) { return 0; }
+     sleep(2); # make sure don't get same seed twice
+     srand(time()^($$+($$<<15))); # from "Programming Perl"
+     my $total=0;
+     for (my $i=1;$i<=$number;$i++) {
+        my $newkey=sprintf("%lx",int(100000*rand)).'-'.
+                   sprintf("%lx",int(100000*rand)).'-'.
+                   sprintf("%lx",int(100000*rand));
+        $newkey=~s/1/g/g; # folks mix up 1 and l
+        $newkey=~s/0/h/g; # and also 0 and O
+        my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
+        if ($existing{$newkey}) {
+            $i--;
+        } else {
+ 	  if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
+               $total++;
+ 	  }
+        }
+     }
+     &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
+          'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
+     return $total;
+ }
+ # ------------------------------------------------------- Validate an accesskey
+ sub validate_access_key {
+     my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
+     $cdom=
+    $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
+     $cnum=
+    $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
+     $udom=$ENV{'user.name'} unless (defined($udom));
+     $uname=$ENV{'user.domain'} unless (defined($uname));
+     my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
+     return ($existing{$ckey} eq $uname.':'.$udom);
+ }
  # ------------------------------------- Find the section of student in a course
+ sub getsection {
+     my ($udom,$unam,$courseid)=@_;
+     $courseid=~s/\_/\//g;
+     $courseid=~s/^(\w)/\/$1/;
+     my %Pending;
+     my %Expired;
+     #
+     # Each role can either have not started yet (pending), be active,
+     #    or have expired.
+     #
+     # If there is an active role, we are done.
+     #
+     # If there is more than one role which has not started yet,
+     #     choose the one which will start sooner
+     # If there is one role which has not started yet, return it.
+     #
+     # If there is more than one expired role, choose the one which ended last.
+     # If there is a role which has expired, return it.
+     #
+     foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
+                         &homeserver($unam,$udom)))) {
+         my ($key,$value)=split(/\=/,$_);
+         $key=&unescape($key);
+         next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
+         my $section=$1;
+         if ($key eq $courseid.'_st') { $section=''; }
+         my ($dummy,$end,$start)=split(/\_/,&unescape($value));
+         my $now=time;
+         if (defined($end) && ($now > $end)) {
+             $Expired{$end}=$section;
+             next;
+         }
+         if (defined($start) && ($now < $start)) {
+             $Pending{$start}=$section;
+             next;
+         }
+         return $section;
+     }
+     #
+     # Presumedly there will be few matching roles from the above
+     # loop and the sorting time will be negligible.
+     if (scalar(keys(%Pending))) {
+         my ($time) = sort {$a <=> $b} keys(%Pending);
+         return $Pending{$time};
+     }
+     if (scalar(keys(%Expired))) {
+         my @sorted = sort {$a <=> $b} keys(%Expired);
+         my $time = pop(@sorted);
+         return $Expired{$time};
+     }
+     return '-1';
+ }
  sub usection {
      my ($udom,$unam,$courseid)=@_;
      $courseid=~s/\_/\//g;
- Line 608  sub userenvironment {
+ Line 770  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);
+ }
+ # ------------------------------------------ Find current version of a resource
+ sub getversion {
+     my $fname=&clutter(shift);
+     unless ($fname=~/^\/res\//) { return -1; }
+     return &currentversion(&filelocation('',$fname));
+ }
+ sub currentversion {
+     my $fname=shift;
+     my $author=$fname;
+     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
+     my ($udom,$uname)=split(/\//,$author);
+     my $home=homeserver($uname,$udom);
+     if ($home eq 'no_host') {
+         return -1;
+     }
+     my $answer=reply("currentversion:$fname",$home);
+     if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
+ 	return -1;
+     }
+     return $answer;
+ }
  # ----------------------------- Subscribe to a resource, return URL if possible
  sub subscribe {
      my $fname=shift;
+     if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
      my $author=$fname;
      $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
      my ($udom,$uname)=split(/\//,$author);
      my $home=homeserver($uname,$udom);
-     if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
+     if ($home eq 'no_host') {
          return 'not_found';
      }
      my $answer=reply("sub:$fname",$home);
      if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
- Line 647  sub repcopy {
+ Line 846  sub repcopy {
      } elsif ($remoteurl eq 'directory') {
             return OK;
      } else {
+         my $author=$filename;
+         $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
+         my ($udom,$uname)=split(/\//,$author);
+         my $home=homeserver($uname,$udom);
+         unless ($home eq $perlvar{'lonHostID'}) {
             my @parts=split(/\//,$filename);
             my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
             if ($path ne "$perlvar{'lonDocRoot'}/res") {
- Line 682  sub repcopy {
+ Line 886  sub repcopy {
                 rename($transname,$filename);
                 return OK;
             }
+        }
      }
  }
+ # ------------------------------------------------ Get server side include body
+ sub ssi_body {
+     my $filelink=shift;
+     my $output=($filelink=~/^http\:/?&externalssi($filelink):
+                                      &ssi($filelink));
+     $output=~s/^.*\<body[^\>]*\>//si;
+     $output=~s/\<\/body\s*\>.*$//si;
+     $output=~
+             s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
+     return $output;
+ }
  # --------------------------------------------------------- Server Side Include
  sub ssi {
- Line 708  sub ssi {
+ Line 925  sub ssi {
      return $response->content;
  }
+ sub externalssi {
+     my ($url)=@_;
+     my $ua=new LWP::UserAgent;
+     my $request=new HTTP::Request('GET',$url);
+     my $response=$ua->request($request);
+     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.
+                                '&tokenissued='.$perlvar{'lonHostID'};
+     } 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'};
+ # Replace Windows backslashes by forward slashes
+     $fname=~s/\\/\//g;
+ # Get rid of everything but the actual filename
+     $fname=~s/^.*\/([^\/]+)$/$1/;
+ # Replace spaces by underscores
+     $fname=~s/\s+/\_/g;
+ # Replace all other weird characters by nothing
+     $fname=~s/[^\w\.\-]//g;
+ # See if there is anything left
+     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'};
+     }
+     return
+         &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
+ }
+ sub finishuserfileupload {
+     my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
+     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
+ #
+     my $fetchresult=
+  &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
+     if ($fetchresult eq 'ok') {
+ #
+ # Return the URL to it
+         return '/uploaded/'.$path.$fname;
+     } else {
+         &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
+          ' to host '.$docuhome.': '.$fetchresult);
+         return '/adm/notfound.html';
+     }
+ }
  # ------------------------------------------------------------------------- Log
  sub log {
- Line 716  sub log {
+ Line 1027  sub log {
  }
  # ------------------------------------------------------------------ Course Log
+ #
+ # This routine flushes several buffers of non-mission-critical nature
+ #
  sub flushcourselogs {
-     &logthis('Flushing course log buffers');
+     &logthis('Flushing log buffers');
+ #
+ # course logs
+ # This is a log of all transactions in a course, which can be used
+ # for data mining purposes
+ #
+ # It also collects the courseid database, which lists last transaction
+ # times and course titles for all courseids
+ #
+     my %courseidbuffer=();
      foreach (keys %courselogs) {
          my $crsid=$_;
-         if (&reply('log:'.$coursedombuf{$crsid}.':'.
+         if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
  		          &escape($courselogs{$crsid}),
  		          $coursehombuf{$crsid}) eq 'ok') {
  	    delete $courselogs{$crsid};
- Line 732  sub flushcourselogs {
+ Line 1055  sub flushcourselogs {
                          " exceeded maximum size, deleting.</font>");
                 delete $courselogs{$crsid};
              }
          }
+         if ($courseidbuffer{$coursehombuf{$crsid}}) {
+            $courseidbuffer{$coursehombuf{$crsid}}.='&'.
+ 			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
+         } else {
+            $courseidbuffer{$coursehombuf{$crsid}}=
+ 			 &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
+         }
      }
-     &logthis('Flushing access logs');
+ #
+ # Write course id database (reverse lookup) to homeserver of courses
+ # Is used in pickcourse
+ #
+     foreach (keys %courseidbuffer) {
+         &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
+     }
+ #
+ # File accesses
+ # Writes to the dynamic metadata of resources to get hit counts, etc.
+ #
      foreach (keys %accesshash) {
          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};
          }
      }
+ #
+ # Roles
+ # Reverse lookup of user roles for course faculty/staff and co-authorship
+ #
+     foreach (keys %userrolehash) {
+         my $entry=$_;
+         my ($role,$uname,$udom,$runame,$rudom,$rsec)=
+ 	    split(/\:/,$entry);
+         if (&Apache::lonnet::put('nohist_userroles',
+              { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
+                 $rudom,$runame) eq 'ok') {
+ 	    delete $userrolehash{$entry};
+         }
+     }
      $dumpcount++;
  }
- Line 751  sub courselog {
+ Line 1105  sub courselog {
      $what=time.':'.$what;
      unless ($ENV{'request.course.id'}) { return ''; }
      $coursedombuf{$ENV{'request.course.id'}}=
-        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
+        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
+     $coursenumbuf{$ENV{'request.course.id'}}=
         $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
      $coursehombuf{$ENV{'request.course.id'}}=
         $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
+     $coursedescrbuf{$ENV{'request.course.id'}}=
+        $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
      if (defined $courselogs{$ENV{'request.course.id'}}) {
  	$courselogs{$ENV{'request.course.id'}}.='&'.$what;
      } else {
- Line 784  sub countacc {
+ Line 1141  sub countacc {
      my $url=&declutter(shift);
      unless ($ENV{'request.course.id'}) { return ''; }
      $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
-     my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
+     my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
      if (defined($accesshash{$key})) {
  	$accesshash{$key}++;
      } else {
          $accesshash{$key}=1;
      }
  }
+ sub linklog {
+     my ($from,$to)=@_;
+     $from=&declutter($from);
+     $to=&declutter($to);
+     $accesshash{$from.'___'.$to.'___comefrom'}=1;
+     $accesshash{$to.'___'.$from.'___goto'}=1;
+ }
+ sub userrolelog {
+     my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
+     if (($trole=~/^ca/) || ($trole=~/^in/) ||
+         ($trole=~/^cc/) || ($trole=~/^ep/) ||
+         ($trole=~/^cr/)) {
+        my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
+        $userrolehash
+          {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
+                     =$tend.':'.$tstart;
+    }
+ }
+ sub get_course_adv_roles {
+     my $cid=shift;
+     $cid=$ENV{'request.course.id'} unless (defined($cid));
+     my %coursehash=&coursedescription($cid);
+     my %returnhash=();
+     my %dumphash=
+             &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
+     my $now=time;
+     foreach (keys %dumphash) {
+ 	my ($tend,$tstart)=split(/\:/,$dumphash{$_});
+         if (($tstart) && ($tstart<0)) { next; }
+         if (($tend) && ($tend<$now)) { next; }
+         if (($tstart) && ($now<$tstart)) { next; }
+         my ($role,$username,$domain,$section)=split(/\:/,$_);
+         my $key=&plaintext($role);
+         if ($section) { $key.=' (Sec/Grp '.$section.')'; }
+         if ($returnhash{$key}) {
+ 	    $returnhash{$key}.=','.$username.':'.$domain;
+         } else {
+             $returnhash{$key}=$username.':'.$domain;
+         }
+     }
+     return sort %returnhash;
+ }
+ # ---------------------------------------------------------- Course ID routines
+ # Deal with domain's nohist_courseid.db files
+ #
+ sub courseidput {
+     my ($domain,$what,$coursehome)=@_;
+     return &reply('courseidput:'.$domain.':'.$what,$coursehome);
+ }
+ sub courseiddump {
+     my ($domfilter,$descfilter,$sincefilter)=@_;
+     my %returnhash=();
+     unless ($domfilter) { $domfilter=''; }
+     foreach my $tryserver (keys %libserv) {
+ 	if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
+ 	    foreach (
+              split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
+ 			       $sincefilter.':'.&escape($descfilter),
+                                $tryserver))) {
+ 		my ($key,$value)=split(/\=/,$_);
+                 if (($key) && ($value)) {
+ 		    $returnhash{&unescape($key)}=&unescape($value);
+                 }
+             }
+         }
+     }
+     return %returnhash;
+ }
+ #
  # ----------------------------------------------------------- Check out an item
  sub checkout {
- Line 899  sub expirespread {
+ Line 1332  sub expirespread {
  # ----------------------------------------------------- Devalidate Spreadsheets
  sub devalidate {
-     my $symb=shift;
+     my ($symb,$uname,$udom)=@_;
      my $cid=$ENV{'request.course.id'};
      if ($cid) {
- 	my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
+ # delete the stored spreadsheets for
+ # - the student level sheet of this user in course's homespace
+ # - the assessment level sheet for this resource
+ #   for this user in user's homespace
+ 	my $key=$uname.':'.$udom.':';
          my $status=
- 	    &del('nohist_calculatedsheet',
+ 	    &del('nohist_calculatedsheets',
  		 [$key.'studentcalc'],
  		 $ENV{'course.'.$cid.'.domain'},
  		 $ENV{'course.'.$cid.'.num'})
- Line 913  sub devalidate {
+ Line 1350  sub devalidate {
  		 [$key.'assesscalc:'.$symb]);
          unless ($status eq 'ok ok') {
             &logthis('Could not devalidate spreadsheet '.
-                     $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
+                     $uname.' at '.$udom.' for '.
  		    $symb.': '.$status);
          }
      }
  }
+ 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($elem) eq 'ARRAY') {
+     if(ref($elem) eq 'ARRAY') {
-       $result.=&escape(&arrayref2str($elem)).'&';
+       $result.=&arrayref2str($elem).'&';
-     } elsif (ref($elem) eq 'HASH') {
+     } elsif(ref($elem) eq 'HASH') {
-       $result.=&escape(&hashref2str($elem)).'&';
+       $result.=&hashref2str($elem).'&';
-     } elsif (ref($elem)) {
+     } elsif(ref($elem)) {
-       &logthis("Got a ref of ".(ref($elem))." skipping.");
+       #print("Got a ref of ".(ref($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($$hashref{$_}) eq 'ARRAY') {
+     if(ref($hashref->{$_}) eq 'ARRAY') {
-       $result.=&escape(&arrayref2str($$hashref{$_})).'&';
+       $result.=&arrayref2str($hashref->{$_}).'&';
-     } elsif (ref($$hashref{$_}) eq 'HASH') {
+     } elsif(ref($hashref->{$_}) eq 'HASH') {
-       $result.=&escape(&hashref2str($$hashref{$_})).'&';
+       $result.=&hashref2str($hashref->{$_}).'&';
-     } elsif (ref($$hashref{$_})) {
+     } elsif(ref($hashref->{$_})) {
-       &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
+        $result.='&';
+       #print("Got a ref of ".(ref($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 %hash;
-     my ($name,$value)=split(/\=/,$_);
-     $name=&unescape($name);
+   if($string !~ /^__HASH_REF__/) {
-     $value=&unescape($value);
+       if (! ($string eq '' || !defined($string))) {
-     if ($value =~ /^_HASH_REF__/) {
+ 	  $hash{'error'}='Not hash reference';
-       $value =~ s/^_HASH_REF__//;
+       }
-       my %hash=&str2hash($value);
+       return (\%hash, $string);
-       $value=\%hash;
-     } elsif ($value =~ /^_ARRAY_REF__/) {
-       $value =~ s/^_ARRAY_REF__//;
-       my @array=&str2array($value);
-       $value=\@array;
-     }
-     $returnhash{$name}=$value;
    }
-   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;
+   my @array;
-   foreach my $value (split(/\&/,$string)) {
-     $value=&unescape($value);
+   if($string !~ /^__ARRAY_REF__/) {
-     if ($value =~ /^_HASH_REF__/) {
+       if (! ($string eq '' || !defined($string))) {
-       $value =~ s/^_HASH_REF__//;
+ 	  $array[0]='Array reference error';
-       my %hash=&str2hash($value);
+       }
-       $value=\%hash;
+       return (\@array, $string);
-     } elsif ($value =~ /^_ARRAY_REF__/) {
+   }
-       $value =~ s/^_ARRAY_REF__//;
-       my @array=&str2array($value);
+   $string =~ s/^__ARRAY_REF__//;
-       $value=\@array;
-     }
+   while($string !~ /^__END_ARRAY_REF__/) {
-     push(@returnarray,$value);
+       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
- Line 1033  sub tmpreset {
+ Line 1568  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});
- Line 1069  sub tmpstore {
+ Line 1604  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='';
- Line 1113  sub tmprestore {
+ Line 1648  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;
- Line 1147  sub store {
+ Line 1682  sub store {
      $symb=&symbclean($symb);
      if (!$symb) { unless ($symb=&symbread()) { return ''; } }
-     &devalidate($symb);
+     if (!$domain) { $domain=$ENV{'user.domain'}; }
+     if (!$stuname) { $stuname=$ENV{'user.name'}; }
+     &devalidate($symb,$stuname,$domain);
      $symb=escape($symb);
      if (!$namespace) {
- Line 1155  sub store {
+ Line 1693  sub store {
            return '';
         }
      }
-     if (!$domain) { $domain=$ENV{'user.domain'}; }
-     if (!$stuname) { $stuname=$ENV{'user.name'}; }
      if (!$home) { $home=$ENV{'user.home'}; }
      my $namevalue='';
      foreach (keys %$storehash) {
- Line 1178  sub cstore {
+ Line 1714  sub cstore {
      $symb=&symbclean($symb);
      if (!$symb) { unless ($symb=&symbread()) { return ''; } }
-     &devalidate($symb);
+     if (!$domain) { $domain=$ENV{'user.domain'}; }
+     if (!$stuname) { $stuname=$ENV{'user.name'}; }
+     &devalidate($symb,$stuname,$domain);
      $symb=escape($symb);
      if (!$namespace) {
- Line 1186  sub cstore {
+ Line 1725  sub cstore {
            return '';
         }
      }
-     if (!$domain) { $domain=$ENV{'user.domain'}; }
-     if (!$stuname) { $stuname=$ENV{'user.name'}; }
      if (!$home) { $home=$ENV{'user.home'}; }
      my $namevalue='';
- Line 1245  sub coursedescription {
+ Line 1782  sub coursedescription {
      $courseid=~s/\_/\//g;
      my ($cdomain,$cnum)=split(/\//,$courseid);
      my $chome=&homeserver($cnum,$cdomain);
+     my $normalid=$cdomain.'_'.$cnum;
+     # need to always cache even if we get errors otherwise we keep
+     # trying and trying and trying to get the course description.
+     my %envhash=();
+     my %returnhash=();
+     $envhash{'course.'.$normalid.'.last_cache'}=time;
      if ($chome ne 'no_host') {
-        my %returnhash=&dump('environment',$cdomain,$cnum);
+        %returnhash=&dump('environment',$cdomain,$cnum);
         if (!exists($returnhash{'con_lost'})) {
-            my $normalid=$cdomain.'_'.$cnum;
-            my %envhash=();
             $returnhash{'home'}= $chome;
  	   $returnhash{'domain'} = $cdomain;
  	   $returnhash{'num'} = $cnum;
             while (my ($name,$value) = each %returnhash) {
                 $envhash{'course.'.$normalid.'.'.$name}=$value;
             }
-            $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
+            $returnhash{'url'}=&clutter($returnhash{'url'});
             $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
  	       $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
-            $envhash{'course.'.$normalid.'.last_cache'}=time;
             $envhash{'course.'.$normalid.'.home'}=$chome;
             $envhash{'course.'.$normalid.'.domain'}=$cdomain;
             $envhash{'course.'.$normalid.'.num'}=$cnum;
-            &appenv(%envhash);
-            return %returnhash;
         }
      }
-     return ();
+     &appenv(%envhash);
+     return %returnhash;
  }
  # -------------------------------------------------------- Get user privileges
- Line 1290  sub rolesinit {
+ Line 1829  sub rolesinit {
              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='';
- Line 1301  sub rolesinit {
+ Line 1842  sub rolesinit {
                  }
              }
              if (($area ne '') && ($trole ne '')) {
- 	       my $spec=$trole.'.'.$area;
+ 		my $spec=$trole.'.'.$area;
-                my ($tdummy,$tdomain,$trest)=split(/\//,$area);
+ 		my ($tdummy,$tdomain,$trest)=split(/\//,$area);
-                if ($trole =~ /^cr\//) {
+ 		if ($trole =~ /^cr\//) {
- 		   my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
+ 		    my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
-                    my $homsvr=homeserver($rauthor,$rdomain);
+ 		    my $homsvr=homeserver($rauthor,$rdomain);
-                    if ($hostname{$homsvr} ne '') {
+ 		    if ($hostname{$homsvr} ne '') {
-                       my $roledef=
+ 			my $roledef=
- 			  reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
+ 			    reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
-                                 $homsvr);
+ 				  $homsvr);
-                       if (($roledef ne 'con_lost') && ($roledef ne '')) {
+ 			if (($roledef ne 'con_lost') && ($roledef ne '')) {
-                          my ($syspriv,$dompriv,$coursepriv)=
+ 			    my ($syspriv,$dompriv,$coursepriv)=
- 			     split(/\_/,unescape($roledef));
+ 				split(/\_/,unescape($roledef));
-  	                 $allroles{'cm./'}.=':'.$syspriv;
+ 			    if (defined($syspriv)) {
-                          $allroles{$spec.'./'}.=':'.$syspriv;
+ 				$allroles{'cm./'}.=':'.$syspriv;
-                          if ($tdomain ne '') {
+ 				$allroles{$spec.'./'}.=':'.$syspriv;
-                              $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
+ 			    }
-                              $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
+ 			    if ($tdomain ne '') {
-                              if ($trest ne '') {
+ 				if (defined($dompriv)) {
- 		                $allroles{'cm.'.$area}.=':'.$coursepriv;
+ 				    $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
- 		                $allroles{$spec.'.'.$area}.=':'.$coursepriv;
+ 				    $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
-                              }
+ 				}
- 	                 }
+ 				if ($trest ne '') {
-                       }
+ 				    if (defined($coursepriv)) {
-                    }
+ 					$allroles{'cm.'.$area}.=':'.$coursepriv;
-                } else {
+ 					$allroles{$spec.'.'.$area}.=':'.$coursepriv;
- 	           $allroles{'cm./'}.=':'.$pr{$trole.':s'};
+ 				    }
- 	           $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
+ 				}
-                    if ($tdomain ne '') {
+ 			    }
-                      $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
+ 			}
-                      $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
+ 		    }
-                       if ($trest ne '') {
+ 		} else {
- 		          $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
+ 		    if (defined($pr{$trole.':s'})) {
- 		          $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
+ 			$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'};
+ 			    }
+ 			}
+ 		    }
+ 		}
              }
            }
          }
- Line 1384  sub get {
+ Line 1937  sub get {
     my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
     my @pairs=split(/\&/,$rep);
+    if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
+      return @pairs;
+    }
     my %returnhash=();
     my $i=0;
     foreach (@$storearr) {
- Line 1431  sub dump {
+ Line 1987  sub dump {
     return %returnhash;
  }
+ # --------------------------------------------------------------- currentdump
+ sub currentdump {
+    my ($courseid,$sdom,$sname)=@_;
+    $courseid = $ENV{'request.course.id'} if (! defined($courseid));
+    $sdom     = $ENV{'user.domain'}       if (! defined($sdom));
+    $sname    = $ENV{'user.name'}         if (! defined($sname));
+    my $uhome = &homeserver($sname,$sdom);
+    my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
+    return if ($rep =~ /^(error:|no_such_host)/);
+    #
+    my %returnhash=();
+    #
+    if ($rep eq "unknown_cmd") {
+        # an old lond will not know currentdump
+        # Do a dump and make it look like a currentdump
+        my @tmp = &dump($courseid,$sdom,$sname,'.');
+        return if ($tmp[0] =~ /^(error:|no_such_host)/);
+        my %hash = @tmp;
+        @tmp=();
+        # Code ripped from lond, essentially.  The only difference
+        # here is the unescaping done by lonnet::dump().  Conceivably
+        # we might run in to problems with parameter names =~ /^v\./
+        while (my ($key,$value) = each(%hash)) {
+            my ($v,$symb,$param) = split(/:/,$key);
+            next if ($v eq 'version' || $symb eq 'keys');
+            next if (exists($returnhash{$symb}) &&
+                     exists($returnhash{$symb}->{$param}) &&
+                     $returnhash{$symb}->{'v.'.$param} > $v);
+            $returnhash{$symb}->{$param}=$value;
+            $returnhash{$symb}->{'v.'.$param}=$v;
+        }
+        #
+        # Remove all of the keys in the hashes which keep track of
+        # the version of the parameter.
+        while (my ($symb,$param_hash) = each(%returnhash)) {
+            # use a foreach because we are going to delete from the hash.
+            foreach my $key (keys(%$param_hash)) {
+                delete($param_hash->{$key}) if ($key =~ /^v\./);
+            }
+        }
+    } else {
+        my @pairs=split(/\&/,$rep);
+        foreach (@pairs) {
+            my ($key,$value)=split(/=/,$_);
+            my ($symb,$param) = split(/:/,$key);
+            $returnhash{&unescape($symb)}->{&unescape($param)} =
+                                                           &unescape($value);
+        }
+    }
+    return %returnhash;
+ }
  # --------------------------------------------------------------- put interface
  sub put {
- Line 1484  sub eget {
+ Line 2092  sub eget {
     return %returnhash;
  }
+ # ---------------------------------------------- Custom access rule evaluation
+ sub customaccess {
+     my ($priv,$uri)=@_;
+     my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
+     $urealm=~s/^\W//;
+     my ($udom,$ucrs,$usec)=split(/\//,$urealm);
+     my $access=0;
+     foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
+ 	my ($effect,$realm,$role)=split(/\:/,$_);
+         if ($role) {
+ 	   if ($role ne $urole) { next; }
+         }
+         foreach (split(/\s*\,\s*/,$realm)) {
+             my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
+             if ($tdom) {
+ 		if ($tdom ne $udom) { next; }
+             }
+             if ($tcrs) {
+ 		if ($tcrs ne $ucrs) { next; }
+             }
+             if ($tsec) {
+ 		if ($tsec ne $usec) { next; }
+             }
+             $access=($effect eq 'allow');
+             last;
+         }
+     }
+     return $access;
+ }
  # ------------------------------------------------- Check for a user privilege
  sub allowed {
- Line 1502  sub allowed {
+ Line 2141  sub allowed {
      if ($priv eq 'bre') {
          my $copyright=&metadata($uri,'copyright');
- 	if ($copyright eq 'public') { return 'F'; }
+ 	if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
+            return 'F';
+         }
          if ($copyright eq 'priv') {
              $uri=~/([^\/]+)\/([^\/]+)\//;
  	    unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
- Line 1516  sub allowed {
+ Line 2157  sub allowed {
  		return '';
              }
          }
+         if ($ENV{'request.role'}=~ /li\.\//) {
+             # Library role, so allow browsing of resources in this domain.
+             return 'F';
+         }
+         if ($copyright eq 'custom') {
+ 	    unless (&customaccess($priv,$uri)) { return ''; }
+         }
+     }
+     # 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='';
- Line 1545  sub allowed {
+ Line 2200  sub allowed {
         $thisallowed.=$1;
      }
+ # URI is an uploaded document for this course
+     if (($priv eq 'bre') &&
+         ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
+         return 'F';
+     }
  # Full access at system, domain or course-wide level? Exit.
      if ($thisallowed=~/F/) {
- Line 1720  sub allowed {
+ Line 2381  sub allowed {
     if ($thisallowed=~/R/) {
         my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
-        my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
+        if (&metadata($uri,'roledeny')=~/$rolecode/) {
-        if (-e $filename) {
+ 	  &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
-            my @content;
-            {
- 	     my $fh=Apache::File->new($filename);
-              @content=<$fh>;
- 	   }
-            if (join('',@content)=~
-                     /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
- 	       &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
                      'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
-            return '';
+           return '';
-            }
         }
     }
- # Restricted by state?
+ # Restricted by state or randomout?
     if ($thisallowed=~/X/) {
+       if ($ENV{'acc.randomout'}) {
+          my $symb=&symbread($uri,1);
+          if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
+             return '';
+          }
+       }
        if (&condval($statecond)) {
  	 return '2';
        } else {
- Line 1757  sub is_on_map {
+ Line 2414  sub is_on_map {
      my @uriparts=split(/\//,$uri);
      my $filename=$uriparts[$#uriparts];
      my $pathname=$uri;
-     $pathname=~s/\/$filename$//;
+     $pathname=~s|/\Q$filename\E$||;
+     $pathname=~s/^adm\/wrapper\///;
+     #Trying to find the conditional for the file
      my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
- 	       /\&$filename\:([\d\|]+)\&/);
+ 	       /\&\Q$filename\E\:([\d\|]+)\&/);
      if ($match) {
-        return (1,$1);
+ 	return (1,$1);
-    } else {
+     } else {
-        return (0,0);
+ 	return (0,0);
-    }
+     }
  }
  # ----------------------------------------------------------------- Define Role
- Line 1812  sub definerole {
+ Line 2471  sub definerole {
  # ---------------- Make a metadata query against the network of library servers
  sub metadata_query {
-     my ($query,$custom,$customshow)=@_;
+     my ($query,$custom,$customshow,$server_array)=@_;
      my %rhash;
-     for my $server (keys %libserv) {
+     my @server_list = (defined($server_array) ? @$server_array
+                                               : keys(%libserv) );
+     for my $server (@server_list) {
  	unless ($custom or $customshow) {
  	    my $reply=&reply("querysend:".&escape($query),$server);
  	    $rhash{$server}=$reply;
- Line 1897  sub plaintext {
+ Line 2558  sub plaintext {
  # ----------------------------------------------------------------- Assign Role
  sub assignrole {
-     my ($udom,$uname,$url,$role,$end,$start)=@_;
+     my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
      my $mrole;
      if ($role =~ /^cr\//) {
  	unless (&allowed('ccr',$url)) {
- Line 1928  sub assignrole {
+ Line 2589  sub assignrole {
             $command.='_0_'.$start;
          }
      }
-     return &reply($command,&homeserver($uname,$udom));
+ # actually delete
+     if ($deleteflag) {
+ 	if (&allowed('dro',$udom)) {
+ # modify command to delete the role
+            $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
+                 "$udom:$uname:$url".'_'."$mrole";
+ # set start and finish to negative values for userrolelog
+            $start=-1;
+            $end=-1;
+         }
+     }
+ # send command
+     my $answer=&reply($command,&homeserver($uname,$udom));
+ # log new user role if status is ok
+     if ($answer eq 'ok') {
+ 	&userrolelog($mrole,$uname,$udom,$url,$start,$end);
+     }
+     return $answer;
  }
  # -------------------------------------------------- Modify user authentication
- Line 1939  sub modifyuserauth {
+ Line 2617  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'},
- Line 1970  sub modifyuser {
+ Line 2649  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)) {
- Line 2020  sub modifyuser {
+ Line 2700  sub modifyuser {
         }
      }
  # -------------------------------------------------------------- Add names, etc
-     my %names=&get('environment',
+     my @tmp=&get('environment',
  		   ['firstname','middlename','lastname','generation'],
  		   $udom,$uname);
-     if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
+     my %names;
+     if ($tmp[0] =~ m/^error:.*/) {
+         %names=();
+     } else {
+         %names = @tmp;
+     }
      if ($first)  { $names{'firstname'}  = $first; }
      if ($middle) { $names{'middlename'} = $middle; }
      if ($last)   { $names{'lastname'}   = $last; }
- Line 2051  sub modifystudent {
+ Line 2736  sub modifystudent {
  	($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
           $desiredhome);
      unless ($reply eq 'ok') { return $reply; }
+     # 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);
+     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';
+     }
+     # Make sure the user exists
      my $uhome=&homeserver($uname,$udom);
      if (($uhome eq '') || ($uhome eq 'no_host')) {
  	return 'error: no such user';
      }
- # -------------------------------------------------- Add student to course list
+     #
-     $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
+     # Get student data if we were not given enough information
+     if (!defined($first)  || $first  eq '' ||
+         !defined($last)   || $last   eq '' ||
+         !defined($uid)    || $uid    eq '' ||
+         !defined($middle) || $middle eq '' ||
+         !defined($gene)   || $gene   eq '') {
+         # They did not supply us with enough data to enroll the student, so
+         # we need to pick up more information.
+         my %tmp = &get('environment',
+                        ['firstname','middlename','lastname', 'generation','id']
+                        ,$udom,$uname);
+         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 '');
+         $gene   = $tmp{'generation'} if (!defined($gene)   || $gene eq '');
+         $uid    = $tmp{'id'}         if (!defined($uid)    || $uid  eq '');
+     }
+     my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
+                                                            $first,$middle);
+     my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
  	              $ENV{'course.'.$cid.'.num'}.':classlist:'.
                        &escape($uname.':'.$udom).'='.
-                       &escape($end.':'.$start),
+                       &escape(join(':',$end,$start,$uid,$usec,$fullname)),
  	              $ENV{'course.'.$cid.'.home'});
      unless (($reply eq 'ok') || ($reply eq 'delayed')) {
  	return 'error: '.$reply;
      }
- # ---------------------------------------------------- Add student role to user
+     # Add student role to user
      my $uurl='/'.$cid;
      $uurl=~s/\_/\//g;
      if ($usec) {
- Line 2095  sub writecoursepref {
+ Line 2819  sub writecoursepref {
  # ---------------------------------------------------------- Make/modify course
  sub createcourse {
-     my ($udom,$description,$url)=@_;
+     my ($udom,$description,$url,$course_server,$nonstandard)=@_;
      $url=&declutter($url);
      my $cid='';
-     unless (&allowed('ccc',$ENV{'user.domain'})) {
+     unless (&allowed('ccc',$udom)) {
-         return 'refused';
-     }
-     unless ($udom eq $ENV{'user.domain'}) {
          return 'refused';
      }
  # ------------------------------------------------------------------- Create ID
- Line 2117  sub createcourse {
+ Line 2838  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')) {
  	return 'error: no such course';
      }
+ # ----------------------------------------------------------------- Course made
+ # log existance
+     &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
+                  $uhome);
+     &flushcourselogs();
+ # set toplevel url
+     my $topurl=$url;
+     unless ($nonstandard) {
+ # ------------------------------------------ For standard courses, make top url
+         my $mapurl=&clutter($url);
+         if ($mapurl eq '/res/') { $mapurl=''; }
+         $ENV{'form.initmap'}=(<<ENDINITMAP);
+ <map>
+ <resource id="1" type="start"></resource>
+ <resource id="2" src="$mapurl"></resource>
+ <resource id="3" type="finish"></resource>
+ <link index="1" from="1" to="2"></link>
+ <link index="2" from="2" to="3"></link>
+ </map>
+ ENDINITMAP
+         $topurl=&declutter(
+         &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
+                           );
+     }
+ # ----------------------------------------------------------- Write preferences
      &writecoursepref($udom.'_'.$uname,
                       ('description' => $description,
-                       'url'         => $url));
+                       'url'         => $topurl));
      return '/'.$udom.'/'.$uname;
  }
  # ---------------------------------------------------------- Assign Custom Role
  sub assigncustomrole {
-     my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
+     my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
      return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
-                        $end,$start);
+                        $end,$start,$deleteflag);
  }
  # ----------------------------------------------------------------- Revoke Role
  sub revokerole {
-     my ($udom,$uname,$url,$role)=@_;
+     my ($udom,$uname,$url,$role,$deleteflag)=@_;
      my $now=time;
-     return &assignrole($udom,$uname,$url,$role,$now);
+     return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
  }
  # ---------------------------------------------------------- Revoke Custom Role
  sub revokecustomrole {
-     my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
+     my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
      my $now=time;
-     return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
+     return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
+            $deleteflag);
  }
  # ------------------------------------------------------------ Directory lister
  sub dirlist {
-     my $uri=shift;
+     my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
      $uri=~s/^\///;
      $uri=~s/\/$//;
-     my ($res,$udom,$uname,@rest)=split(/\//,$uri);
+     my ($udom, $uname);
-     if ($udom) {
+     (undef,$udom,$uname)=split(/\//,$uri);
-      if ($uname) {
+     if(defined($userdomain)) {
-        my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
+         $udom = $userdomain;
-                       homeserver($uname,$udom));
+     }
-        return split(/:/,$listing);
+     if(defined($username)) {
-      } else {
+         $uname = $username;
-        my $tryserver;
+     }
-        my %allusers=();
-        foreach $tryserver (keys %libserv) {
+     my $dirRoot = $perlvar{'lonDocRoot'};
- 	  if ($hostdom{$tryserver} eq $udom) {
+     if(defined($alternateDirectoryRoot)) {
-              my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
+         $dirRoot = $alternateDirectoryRoot;
- 			       $tryserver);
+         $dirRoot =~ s/\/$//;
-              if (($listing ne 'no_such_dir') && ($listing ne 'empty')
+     }
-               && ($listing ne 'con_lost')) {
-                 foreach (split(/:/,$listing)) {
+     if($udom) {
-                   my ($entry,@stat)=split(/&/,$_);
+         if($uname) {
-                   $allusers{$entry}=1;
+             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) {
-        my $alluserstr='';
+                 $alluserstr.=$_.'&user:';
-        foreach (sort keys %allusers) {
+             }
-            $alluserstr.=$_.'&user:';
+             $alluserstr=~s/:$//;
-        }
+             return split(/:/,$alluserstr);
-        $alluserstr=~s/:$//;
+         } else {
-        return split(/:/,$alluserstr);
+             my @emptyResults = ();
-      }
+             push(@emptyResults, 'missing user name');
-    } else {
+             return split(':',@emptyResults);
-        my $tryserver;
+         }
-        my %alldom=();
+     } elsif(!defined($alternateDirectoryRoot)) {
-        foreach $tryserver (keys %libserv) {
+         my $tryserver;
- 	   $alldom{$hostdom{$tryserver}}=1;
+         my %alldom=();
-        }
+         foreach $tryserver (keys %libserv) {
-        my $alldomstr='';
+             $alldom{$hostdom{$tryserver}}=1;
-        foreach (sort keys %alldom) {
+         }
-           $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
+         my $alldomstr='';
-        }
+         foreach (sort keys %alldom) {
-        $alldomstr=~s/:$//;
+             $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
-        return split(/:/,$alldomstr);
+         }
-    }
+         $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
- Line 2257  sub condval {
+ Line 3056  sub condval {
      return $result;
  }
+ # ---------------------------------------------------- Devalidate courseresdata
+ sub devalidatecourseresdata {
+     my ($coursenum,$coursedomain)=@_;
+     my $hashid=$coursenum.':'.$coursedomain;
+     delete $courseresdatacache{$hashid.'.time'};
+ }
  # --------------------------------------------------- Course Resourcedata Query
  sub courseresdata {
      my ($coursenum,$coursedomain,@which)=@_;
      my $coursehom=&homeserver($coursenum,$coursedomain);
      my $hashid=$coursenum.':'.$coursedomain;
-     unless (defined($courseresdatacache{$hashid.'.time'})) {
+     my $dodump=0;
- 	unless (time-$courseresdatacache{$hashid.'.time'}<300) {
+     if (!defined($courseresdatacache{$hashid.'.time'})) {
-            my $coursehom=&homeserver($coursenum,$coursedomain);
+ 	$dodump=1;
-            if ($coursehom) {
+     } else {
-               my $dumpreply=&reply('dump:'.$coursedomain.':'.$coursenum.
+ 	if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
- 			     ':resourcedata:.',$coursehom);
- 	      unless ($dumpreply=~/^error\:/) {
- 	         $courseresdatacache{$hashid.'.time'}=time;
-                  $courseresdatacache{$hashid}=$dumpreply;
- 	     }
- 	  }
-        }
      }
-    my @pairs=split(/\&/,$courseresdatacache{$hashid});
+     if ($dodump) {
-    my %returnhash=();
+ 	my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
-    foreach (@pairs) {
+ 	my ($tmp) = keys(%dumpreply);
-       my ($key,$value)=split(/=/,$_);
+ 	if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
-       $returnhash{unescape($key)}=unescape($value);
+ 	    $courseresdatacache{$hashid.'.time'}=time;
-    }
+ 	    $courseresdatacache{$hashid}=\%dumpreply;
-     my $item;
+ 	} elsif ($tmp =~ /^(con_lost|no_such_host)/) {
-    foreach $item (@which) {
+ 	    return $tmp;
-        if ($returnhash{$item}) { return $returnhash{$item}; }
+ 	}
-    }
+     }
-    return '';
+     foreach my $item (@which) {
+ 	if (defined($courseresdatacache{$hashid}->{$item})) {
+ 	    return $courseresdatacache{$hashid}->{$item};
+ 	}
+     }
+     return undef;
  }
  # --------------------------------------------------------- Value of a Variable
  sub EXT {
-     my ($varname,$symbparm,$udom,$uname)=@_;
+     my ($varname,$symbparm,$udom,$uname,)=@_;
      unless ($varname) { return ''; }
      #get real user name/domain, courseid and symb
      my $courseid;
+     my $publicuser;
      if (!($uname && $udom)) {
-       (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
+       (my $cursymb,$courseid,$udom,$uname,$publicuser)=
+ 	  &Apache::lonxml::whichuser();
        if (!$symbparm) {	$symbparm=$cursymb; }
      } else {
  	$courseid=$ENV{'request.course.id'};
      }
      my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
      my $rest;
-     if ($therest[0]) {
+     if (defined($therest[0])) {
         $rest=join('.',@therest);
      } else {
         $rest='';
      }
      my $qualifierrest=$qualifier;
      if ($rest) { $qualifierrest.='.'.$rest; }
      my $spacequalifierrest=$space;
- Line 2319  sub EXT {
+ Line 3125  sub EXT {
      if ($realm eq 'user') {
  # --------------------------------------------------------------- user.resource
  	if ($space eq 'resource') {
- 	    my %restored=&restore(undef,undef,$udom,$uname);
+ 	    if (defined($Apache::lonhomework::parsing_a_problem)) {
-             return $restored{$qualifierrest};
+ 		return $Apache::lonhomework::history{$qualifierrest};
+ 	    } else {
+ 		my %restored;
+ 		if ($publicuser || $ENV{'request.state'} eq 'construct') {
+ 		    %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
+ 		} else {
+ 		    %restored=&restore($symbparm,$courseid,$udom,$uname);
+ 		}
+ 		return $restored{$qualifierrest};
+ 	    }
  # ----------------------------------------------------------------- user.access
          } elsif ($space eq 'access') {
  	    # FIXME - not supporting calls for a specific user
- Line 2331  sub EXT {
+ Line 3146  sub EXT {
  		($udom eq $ENV{'user.domain'})) {
  		return $ENV{join('.',('environment',$qualifierrest))};
  	    } else {
- 		my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
+ 		my %returnhash;
+ 		if (!$publicuser) {
+ 		    %returnhash=&userenvironment($udom,$uname,
+ 						 $qualifierrest);
+ 		}
  		return $returnhash{$qualifierrest};
  	    }
  # ----------------------------------------------------------------- user.course
- Line 2355  sub EXT {
+ Line 3174  sub EXT {
              return $uname;
  # ---------------------------------------------------- Any other user namespace
          } else {
-             my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
+ 	    my %reply;
-             my %reply=&get($space,[$item]);
+ 	    if (!$publicuser) {
-             return $reply{$item};
+ 		%reply=&get($space,[$qualifierrest],$udom,$uname);
+ 	    }
+ 	    return $reply{$qualifierrest};
          }
      } elsif ($realm eq 'query') {
  # ---------------------------------------------- pull stuff out of query string
- Line 2376  sub EXT {
+ Line 3197  sub EXT {
          return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
      } elsif ($realm eq 'resource') {
- 	if ($courseid eq $ENV{'request.course.id'}) {
+ 	if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
  	    #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
- Line 2391  sub EXT {
+ Line 3212  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);
  	    }
- Line 2405  sub EXT {
+ Line 3226  sub EXT {
  	    my $courselevelm=$courseid.'.'.$mapparm;
  # ----------------------------------------------------------- first, check user
- 	    my %resourcedata=&get('resourcedata',
+ 	    #most student don't have any data set, check if there is some data
- 				  [$courselevelr,$courselevelm,$courselevel],
+             #every thirty minutes
- 				 $udom,$uname);
+ 	    if (!
- 	    if (($resourcedata{$courselevelr}!~/^error\:/) &&
+ 		(exists($ENV{'cache.studentresdata'})
- 		($resourcedata{$courselevelr}!~/^con_lost/)) {
+ 		    && (($ENV{'cache.studentresdata'}+1800) > time))) {
+ 		my %resourcedata=&get('resourcedata',
- 		if ($resourcedata{$courselevelr}) {
+ 				      [$courselevelr,$courselevelm,$courselevel],
- 		    return $resourcedata{$courselevelr}; }
+ 				      $udom,$uname);
- 		if ($resourcedata{$courselevelm}) {
+ 		my ($tmp)=keys(%resourcedata);
- 		    return $resourcedata{$courselevelm}; }
+ 		if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
- 		if ($resourcedata{$courselevel}) {
+ 		    if ($resourcedata{$courselevelr}) {
- 		    return $resourcedata{$courselevel}; }
+ 			return $resourcedata{$courselevelr}; }
- 	    } else {
+ 		    if ($resourcedata{$courselevelm}) {
- 		if ($resourcedata{$courselevelr}!~/No such file/) {
+ 			return $resourcedata{$courselevelm}; }
- 		    &logthis("<font color=blue>WARNING:".
+ 		    if ($resourcedata{$courselevel}) {
- 			     " Trying to get resource data for ".
+ 			return $resourcedata{$courselevel}; }
- 			     $uname." at ".$udom.": ".
+ 		} else {
- 			     $resourcedata{$courselevelr}."</font>");
+ 		    if ($tmp!~/No such file/) {
+ 			&logthis("<font color=blue>WARNING:".
+ 				 " Trying to get resource data for ".
+ 				 $uname." at ".$udom.": ".
+ 				 $tmp."</font>");
+ 		    } elsif ($tmp=~/error:No such file/) {
+ 			$ENV{'cache.studentresdata'}=time;
+ 			&appenv(('cache.studentresdata'=>
+ 				 $ENV{'cache.studentresdata'}));
+ 		    } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
+ 			return $tmp;
+ 		    }
  		}
  	    }
- Line 2433  sub EXT {
+ Line 3265  sub EXT {
  					  ($seclevelr,$seclevelm,$seclevel,
  					   $courselevelr,$courselevelm,
  					   $courselevel));
- 	    if ($coursereply) { return $coursereply; }
+ 	    if (defined($coursereply)) { return $coursereply; }
  # ------------------------------------------------------ third, check map parms
  	    my %parmhash=();
  	    my $thisparm='';
  	    if (tie(%parmhash,'GDBM_File',
  		    $ENV{'request.course.fn'}.'_parms.db',
- 		    &GDBM_READER,0640)) {
+ 		    &GDBM_READER(),0640)) {
  		$thisparm=$parmhash{$symbparm};
  		untie(%parmhash);
  	    }
- Line 2449  sub EXT {
+ Line 3281  sub EXT {
  # --------------------------------------------- last, look in resource metadata
  	$spacequalifierrest=~s/\./\_/;
- 	my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
+ 	my $filename;
- 	if ($metadata) { return $metadata; }
+ 	if (!$symbparm) { $symbparm=&symbread(); }
- 	$metadata=&metadata($ENV{'request.filename'},
+ 	if ($symbparm) {
- 			    'parameter_'.$spacequalifierrest);
+ 	    $filename=(split(/\_\_\_/,$symbparm))[2];
- 	if ($metadata) { return $metadata; }
+ 	} else {
+ 	    $filename=$ENV{'request.filename'};
+ 	}
+ 	my $metadata=&metadata($filename,$spacequalifierrest);
+ 	if (defined($metadata)) { return $metadata; }
+ 	$metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
+ 	if (defined($metadata)) { return $metadata; }
  # ------------------------------------------------------------------ Cascade up
  	unless ($space eq '0') {
- 	    my ($part,$id)=split(/\_/,$space);
+ 	    my @parts=split(/_/,$space);
- 	    if ($id) {
+ 	    my $id=pop(@parts);
- 		my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
+ 	    my $part=join('_',@parts);
- 				     $symbparm,$udom,$uname);
+ 	    if ($part eq '') { $part='0'; }
- 		if ($partgeneral) { return $partgeneral; }
+ 	    my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
- 	    } else {
+ 				 $symbparm,$udom,$uname);
- 		my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
+ 	    if (defined($partgeneral)) { return $partgeneral; }
- 					 $symbparm,$udom,$uname);
- 		if ($resourcegeneral) { return $resourcegeneral; }
- 	    }
  	}
  # ---------------------------------------------------- Any other user namespace
- Line 2488  sub EXT {
+ Line 3323  sub EXT {
      return '';
  }
+ sub add_prefix_and_part {
+     my ($prefix,$part)=@_;
+     my $keyroot;
+     if (defined($prefix) && $prefix !~ /^__/) {
+ 	# prefix that has a part already
+ 	$keyroot=$prefix;
+     } elsif (defined($prefix)) {
+ 	# prefix that is missing a part
+ 	if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
+     } else {
+ 	# no prefix at all
+ 	if (defined($part)) { $keyroot='_'.$part; }
+     }
+     return $keyroot;
+ }
  # ---------------------------------------------------------------- Get metadata
  sub metadata {
      my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
      $uri=&declutter($uri);
+     # 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$|)) {
+ 	return '';
+     }
      my $filename=$uri;
      $uri=~s/\.meta$//;
  #
- Line 2501  sub metadata {
+ Line 3357  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?
  #
- Line 2511  sub metadata {
+ Line 3367  sub metadata {
          }
          my %metathesekeys=();
          unless ($filename=~/\.meta$/) { $filename.='.meta'; }
- 	my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
+ 	my $metastring=&getfile(&filelocation('',&clutter($filename)));
          my $parser=HTML::LCParser->new(\$metastring);
          my $token;
          undef %metathesekeys;
          while ($token=$parser->get_token) {
-            if ($token->[0] eq 'S') {
+ 	    if ($token->[0] eq 'S') {
- 	     if (defined($token->[2]->{'package'})) {
+ 		if (defined($token->[2]->{'package'})) {
  #
  # This is a package - get package info
  #
- 	      my $package=$token->[2]->{'package'};
+ 		    my $package=$token->[2]->{'package'};
- 	      my $keyroot='';
+ 		    my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
-               if ($prefix) {
+ 		    if (defined($token->[2]->{'id'})) {
- 		  $keyroot.='_'.$prefix;
+ 			$keyroot.='_'.$token->[2]->{'id'};
-               } else {
+ 		    }
-                 if (defined($token->[2]->{'part'})) {
+ 		    if ($metacache{$uri.':packages'}) {
-                    $keyroot.='_'.$token->[2]->{'part'};
+ 			$metacache{$uri.':packages'}.=','.$package.$keyroot;
- 	        }
+ 		    } else {
- 	      }
+ 			$metacache{$uri.':packages'}=$package.$keyroot;
-               if (defined($token->[2]->{'id'})) {
+ 		    }
-                  $keyroot.='_'.$token->[2]->{'id'};
+ 		    foreach (keys %packagetab) {
- 	      }
+ 			if ($_=~/^$package\&/) {
-               if ($metacache{$uri.':packages'}) {
+ 			    my ($pack,$name,$subp)=split(/\&/,$_);
-                  $metacache{$uri.':packages'}.=','.$package.$keyroot;
+ 			    my $value=$packagetab{$_};
-               } else {
+ 			    my $part=$keyroot;
-                  $metacache{$uri.':packages'}=$package.$keyroot;
+ 			    $part=~s/^\_//;
- 	      }
+ 			    if ($subp eq 'display') {
-               foreach (keys %packagetab) {
+ 				$value.=' [Part: '.$part.']';
- 		  if ($_=~/^$package\&/) {
+ 			    }
- 		      my ($pack,$name,$subp)=split(/\&/,$_);
+ 			    my $unikey='parameter'.$keyroot.'_'.$name;
-                       my $value=$packagetab{$_};
+ 			    if ($subp eq 'default') {
- 		      my $part=$keyroot;
+ 				$unikey='parameter_0_'.$name;
-                       $part=~s/^\_//;
+ 				$metacache{$uri.':'.$unikey.'.part'}='0';
-                       if ($subp eq 'display') {
+ 			    } else {
- 			  $value.=' [Part: '.$part.']';
+ 				$metacache{$uri.':'.$unikey.'.part'}=$part;
-                       }
+ 				$metathesekeys{$unikey}=1;
-                       my $unikey='parameter'.$keyroot.'_'.$name;
+ 			    }
-                       $metathesekeys{$unikey}=1;
+ 			    unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
-                       $metacache{$uri.':'.$unikey.'.part'}=$part;
+ 				$metacache{$uri.':'.$unikey.'.'.$subp}=$value;
-                       unless
+ 			    }
-                        (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
+ 			    if (defined($metacache{$uri.':'.$unikey.'.default'})) {
-                          $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
+ 				$metacache{$uri.':'.$unikey}=
- 		      }
+ 				    $metacache{$uri.':'.$unikey.'.default'};
-                   }
+ 			    }
-               }
+ 			}
-              } else {
+ 		    }
+ 		} else {
  #
  # This is not a package - some other kind of start tag
  #
-               my $entry=$token->[1];
+ 		    my $entry=$token->[1];
-               my $unikey;
+ 		    my $unikey;
-               if ($entry eq 'import') {
+ 		    if ($entry eq 'import') {
-                  $unikey='';
+ 			$unikey='';
-               } else {
+ 		    } else {
-                  $unikey=$entry;
+ 			$unikey=$entry;
- 	      }
+ 		    }
-               if ($prefix) {
+ 		    $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
- 		  $unikey.=$prefix;
-               } else {
+ 		    if (defined($token->[2]->{'id'})) {
-                 if (defined($token->[2]->{'part'})) {
+ 			$unikey.='_'.$token->[2]->{'id'};
-                    $unikey.='_'.$token->[2]->{'part'};
+ 		    }
- 	        }
- 	      }
-               if (defined($token->[2]->{'id'})) {
-                  $unikey.='_'.$token->[2]->{'id'};
- 	      }
-              if ($entry eq 'import') {
+ 		    if ($entry eq 'import') {
  #
  # Importing a library here
  #
- 		 if (defined($depthcount)) { $depthcount++; } else
+ 			if ($depthcount<20) {
-                                            { $depthcount=0; }
+ 			    my $location=$parser->get_text('/import');
-                  if ($depthcount<20) {
+ 			    my $dir=$filename;
- 		     foreach (split(/\,/,&metadata($uri,'keys',
+ 			    $dir=~s|[^/]*$||;
-                                   $parser->get_text('/import'),$unikey,
+ 			    $location=&filelocation($dir,$location);
-                                   $depthcount))) {
+ 			    foreach (sort(split(/\,/,&metadata($uri,'keys',
-                          $metathesekeys{$_}=1;
+ 							       $location,$unikey,
- 		     }
+ 							       $depthcount+1)))) {
- 		 }
+ 				$metathesekeys{$_}=1;
-              } else {
+ 			    }
+ 			}
-               if (defined($token->[2]->{'name'})) {
+ 		    } else {
-                  $unikey.='_'.$token->[2]->{'name'};
- 	      }
+ 			if (defined($token->[2]->{'name'})) {
-               $metathesekeys{$unikey}=1;
+ 			    $unikey.='_'.$token->[2]->{'name'};
-               foreach (@{$token->[3]}) {
+ 			}
- 		  $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
+ 			$metathesekeys{$unikey}=1;
-               }
+ 			foreach (@{$token->[3]}) {
-               unless (
+ 			    $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
-                  $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
+ 			}
- 		      ) { $metacache{$uri.':'.$unikey}=
+ 			my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
- 			      $metacache{$uri.':'.$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
+ 			    $metacache{$uri.':'.$unikey}=$default;
+ 			} else {
+ 		  # either something interesting inside the tag or default
+                   # uninteresting
+ 			    $metacache{$uri.':'.$unikey}=$internaltext;
+ 			}
  # end of not-a-package not-a-library import
- 	   }
+ 		    }
  # end of not-a-package start tag
- 	  }
+ 		}
  # the next is the end of "start tag"
- 	 }
+ 	    }
-        }
+ 	}
-        $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
+ # are there custom rights to evaluate
-        $metacache{$uri.':cachedtimestamp'}=time;
+ 	if ($metacache{$uri.':copyright'} eq 'custom') {
+     #
+     # Importing a rights file here
+     #
+ 	    unless ($depthcount) {
+ 		my $location=$metacache{$uri.':customdistributionfile'};
+ 		my $dir=$filename;
+ 		$dir=~s|[^/]*$||;
+ 		$location=&filelocation($dir,$location);
+ 		foreach (sort(split(/\,/,&metadata($uri,'keys',
+ 						   $location,'_rights',
+ 						   $depthcount+1)))) {
+ 		    $metathesekeys{$_}=1;
+ 		}
+ 	    }
+ 	}
+ 	$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.'.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;
+     }
+ }
+ # ------------------------------------------------- Get the title of a resource
+ sub gettitle {
+     my $urlsymb=shift;
+     my $symb=&symbread($urlsymb);
+     unless ($symb) {
+ 	unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
+         return &metadata($urlsymb,'title');
+     }
+     if ($titlecache{$symb}) { return $titlecache{$symb}; }
+     my ($map,$resid,$url)=split(/\_\_\_/,$symb);
+     my $title='';
+     my %bighash;
+     if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
+                             &GDBM_READER(),0640)) {
+         my $mapid=$bighash{'map_pc_'.&clutter($map)};
+         $title=$bighash{'title_'.$mapid.'.'.$resid};
+         untie %bighash;
+     }
+     $title=~s/\&colon\;/\:/gs;
+     if ($title) {
+         $titlecache{$symb}=$title;
+         return $title;
+     } else {
+ 	return &metadata($urlsymb,'title');
+     }
+ }
  # ------------------------------------------------- Update symbolic store links
  sub symblist {
- Line 2627  sub symblist {
+ Line 3563  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{$_};
              }
- Line 2655  sub symbverify {
+ Line 3591  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};
+         my $ids=$bighash{'ids_'.&clutter($thisfn)};
          unless ($ids) {
             $ids=$bighash{'ids_/'.$thisfn};
          }
- Line 2693  sub symbclean {
+ Line 3629  sub symbclean {
  # ------------------------------------------------------ Return symb list entry
  sub symbread {
-     my $thisfn=shift;
+     my ($thisfn,$donotrecurse)=@_;
  # no filename provided? try from environment
      unless ($thisfn) {
          if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
- Line 2709  sub symbread {
+ Line 3645  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);
          }
- Line 2725  sub symbread {
+ Line 3661  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};
+               my $ids=$bighash{'ids_'.&clutter($thisfn)};
                unless ($ids) {
                   $ids=$bighash{'ids_/'.$thisfn};
                }
- Line 2742  sub symbread {
+ Line 3678  sub symbread {
  # ----------------------------------------------- There is only one possibility
  		     my ($mapid,$resid)=split(/\./,$ids);
                       $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
-                  } else {
+                  } elsif (!$donotrecurse) {
  # ------------------------------------------ There is more than one possibility
                       my $realpossible=0;
                       foreach (@possibilities) {
- Line 2757  sub symbread {
+ Line 3693  sub symbread {
  			 }
                       }
  		     if ($realpossible!=1) { $syval=''; }
+                  } else {
+                      $syval='';
                   }
  	      }
                untie(%bighash)
- Line 2825  sub ireceipt {
+ Line 3763  sub ireceipt {
  }
  sub receipt {
-     return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
+   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-                      $ENV{'request.course.id'},&symbread());
+   return &ireceipt($name,$domain,$courseid,$symb);
  }
  # ------------------------------------------------------------ Serves up a file
  # returns either the contents of the file or a -1
  sub getfile {
-   my $file=shift;
+  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=Apache::File->new($file);
    my $a='';
    while (<$fh>) { $a .=$_; }
-   return $a
+   return $a;
+  }
  }
  sub filelocation {
- Line 2848  sub filelocation {
+ Line 3797  sub filelocation {
    if ($file=~m:^/~:) { # is a contruction space reference
      $location = $file;
      $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
+   } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
+     $location=$file;
    } else {
      $file=~s/^$perlvar{'lonDocRoot'}//;
      $file=~s:^/*res::;
- Line 2885  sub declutter {
+ Line 3836  sub declutter {
      return $thisfn;
  }
+ # ------------------------------------------------------------- Clutter up URLs
+ sub clutter {
+     my $thisfn='/'.&declutter(shift);
+     unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
+        $thisfn='/res'.$thisfn;
+     }
+     return $thisfn;
+ }
  # -------------------------------------------------------- Escape Special Chars
  sub escape {
- Line 2907  sub goodbye {
+ Line 3868  sub goodbye {
     &logthis("Starting Shut down");
     &flushcourselogs();
     &logthis("Shutting down");
+    return DONE;
  }
  BEGIN {
- Line 2935  BEGIN {
+ Line 3897  BEGIN {
      }
  }
+ # ------------------------------------------------------------ Read domain file
+ {
+     my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
+                             '/domain.tab');
+     %domaindescription = ();
+     %domain_auth_def = ();
+     %domain_auth_arg_def = ();
+     if ($fh) {
+        while (<$fh>) {
+            next if /^\#/;
+            chomp;
+            my ($domain, $domain_description, $def_auth, $def_auth_arg)
+                = split(/:/,$_,4);
+            $domain_auth_def{$domain}=$def_auth;
+            $domain_auth_arg_def{$domain}=$def_auth_arg;
+            $domaindescription{$domain}=$domain_description;
+ #          &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
+ #          &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
+        }
+     }
+ }
  # ------------------------------------------------------------- Read hosts file
  {
      my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
      while (my $configline=<$config>) {
+        next if ($configline =~ /^(\#|\s*$)/);
         chomp($configline);
-        my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
+        my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
-        $hostname{$id}=$name;
+        if ($id && $domain && $role && $name && $ip) {
-        $hostdom{$id}=$domain;
+ 	 $hostname{$id}=$name;
-        $hostip{$id}=$ip;
+ 	 $hostdom{$id}=$domain;
-        if ($role eq 'library') { $libserv{$id}=$name; }
+ 	 $hostip{$id}=$ip;
+ 	 $iphost{$ip}=$id;
+ 	 if ($role eq 'library') { $libserv{$id}=$name; }
+        } else {
+ 	 if ($configline) {
+ 	   &logthis("Skipping hosts.tab line -$configline-");
+ 	 }
+        }
      }
  }
- Line 2955  BEGIN {
+ Line 3948  BEGIN {
      while (my $configline=<$config>) {
         chomp($configline);
-        if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
+        if ($configline) {
            $spareid{$configline}=1;
         }
      }
- Line 3001  BEGIN {
+ Line 3994  BEGIN {
      }
  }
+ # ------------- set up temporary directory
+ {
+     $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
+ }
  %metacache=();
- $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
+ $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
  $dumpcount=0;
  &logtouch();
- Line 3219  modify user
+ Line 4218  modify user
  =item *
- modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
+ modifystudent
+ modify a students enrollment and identification information.
+ The course id is resolved based on the current users environment.
+ This means the envoking user must be a course coordinator or otherwise
+ associated with a course.
+ This call is essentially a wrapper for lonnet::modifyuser and
+ lonnet::modify_student_enrollment
+ Inputs:
+ =over 4
+ =item B<$udom> Students loncapa domain
+ =item B<$uname> Students loncapa login name
+ =item B<$uid> Students id/student number
+ =item B<$umode> Students authentication mode
+ =item B<$upass> Students password
+ =item B<$first> Students first name
+ =item B<$middle> Students middle name
+ =item B<$last> Students last name
+ =item B<$gene> Students generation
+ =item B<$usec> Students section in course
+ =item B<$end> Unix time of the roles expiration
+ =item B<$start> Unix time of the roles start date
+ =item B<$forceid> If defined, allow $uid to be changed
+ =item B<$desiredhome> server to use as home server for student
+ =back
+ =item *
+ modify_student_enrollment
+ Change a students enrollment status in a class.  The environment variable
+ 'role.request.course' must be defined for this function to proceed.
+ Inputs:
+ =over 4
+ =item $udom, students domain
+ =item $uname, students name
+ =item $uid, students user id
+ =item $first, students first name
+ =item $middle
+ =item $last
+ =item $gene
+ =item $usec
+ =item $end
+ =item $start
+ =back
  =item *

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.243
changed lines
	Added in v.1.363