[BACK]Return to lonnet.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / lonnet / perl

Diff for /loncom/lonnet/perl/lonnet.pm between versions 1.386 and 1.610

version 1.386, 2003/07/03 19:26:21 version 1.610, 2005/03/17 20:56:55
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,  
 # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,  
 # 11/8,11/16,11/18,11/22,11/23,12/22,  
 # 01/06,01/13,02/24,02/28,02/29,  
 # 03/01,03/02,03/06,03/07,03/13,  
 # 04/05,05/29,05/31,06/01,  
 # 06/05,06/26 Gerd Kortemeyer  
 # 06/26 Ben Tyszka  
 # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer  
 # 08/14 Ben Tyszka  
 # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer  
 # 10/04 Gerd Kortemeyer  
 # 10/04 Guy Albertelli  
 # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,   
 # 10/30,10/31,  
 # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,  
 # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer  
 # 05/01/01 Guy Albertelli  
 # 05/01,06/01,09/01 Gerd Kortemeyer  
 # 09/01 Guy Albertelli  
 # 09/01,10/01,11/01 Gerd Kortemeyer  
 # YEAR=2001  
 # 3/2 Gerd Kortemeyer  
 # 3/19,3/20 Gerd Kortemeyer  
 # 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  
 # 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  
 # 12/21,12/22,12/27,12/28 Gerd Kortemeyer  
 # YEAR=2002  
 # 1/4,2/4,2/7 Gerd Kortemeyer  
 #  
 ###  ###
   
 package Apache::lonnet;  package Apache::lonnet;
   
 use strict;  use strict;
 use Apache::File;  
 use LWP::UserAgent();  use LWP::UserAgent();
 use HTTP::Headers;  use HTTP::Headers;
   use HTTP::Date;
   # use Date::Parse;
 use vars   use vars 
 qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom   qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom 
    %libserv %pr %prp %metacache %packagetab %titlecache      %libserv %pr %prp $memcache %packagetab 
    %courselogs %accesshash %userrolehash $processmarker $dumpcount      %courselogs %accesshash %userrolehash $processmarker $dumpcount 
    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache      %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
    %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);     %domaindescription %domain_auth_def %domain_auth_arg_def 
      %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit);
   
 use IO::Socket;  use IO::Socket;
 use GDBM_File;  use GDBM_File;
 use Apache::Constants qw(:common :http);  use Apache::Constants qw(:common :http);
 use HTML::LCParser;  use HTML::LCParser;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::loncoursedata;  use Apache::lonlocal;
   use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
   use Time::HiRes qw( gettimeofday tv_interval );
   use Cache::Memcached;
 my $readit;  my $readit;
   my $max_connection_retries = 10;     # Or some such value.
   
   =pod
   
   =head1 Package Variables
   
   These are largely undocumented, so if you decipher one please note it here.
   
   =over 4
   
   =item $processmarker
   
   Contains the time this process was started and this servers host id.
   
   =item $dumpcount
   
   Counts the number of times a message log flush has been attempted (regardless
   of success) by this process.  Used as part of the filename when messages are
   delayed.
   
   =back
   
   =cut
   
   
 # --------------------------------------------------------------------- Logging  # --------------------------------------------------------------------- Logging
   
 sub logtouch {  sub logtouch {
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     unless (-e "$execdir/logs/lonnet.log") {      unless (-e "$execdir/logs/lonnet.log") {
  my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");   open(my $fh,">>$execdir/logs/lonnet.log");
  close $fh;   close $fh;
     }      }
     my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];      my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
Line 103  sub logthis { Line 94  sub logthis {
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     my $now=time;      my $now=time;
     my $local=localtime($now);      my $local=localtime($now);
     my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");      if (open(my $fh,">>$execdir/logs/lonnet.log")) {
     print $fh "$local ($$): $message\n";   print $fh "$local ($$): $message\n";
    close($fh);
       }
     return 1;      return 1;
 }  }
   
Line 113  sub logperm { Line 106  sub logperm {
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     my $now=time;      my $now=time;
     my $local=localtime($now);      my $local=localtime($now);
     my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");      if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
     print $fh "$now:$message:$local\n";   print $fh "$now:$message:$local\n";
    close($fh);
       }
     return 1;      return 1;
 }  }
   
Line 122  sub logperm { Line 117  sub logperm {
 sub subreply {  sub subreply {
     my ($cmd,$server)=@_;      my ($cmd,$server)=@_;
     my $peerfile="$perlvar{'lonSockDir'}/$server";      my $peerfile="$perlvar{'lonSockDir'}/$server";
     my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",      #
                                      Type    => SOCK_STREAM,      #  With loncnew process trimming, there's a timing hole between lonc server
                                      Timeout => 10)      #  process exit and the master server picking up the listen on the AF_UNIX
        or return "con_lost";      #  socket.  In that time interval, a lock file will exist:
     print $client "$cmd\n";  
     my $answer=<$client>;      my $lockfile=$peerfile.".lock";
     if (!$answer) { $answer="con_lost"; }      while (-e $lockfile) { # Need to wait for the lockfile to disappear.
     chomp($answer);   sleep(1);
       }
       # At this point, either a loncnew parent is listening or an old lonc
       # or loncnew child is listening so we can connect or everything's dead.
       #
       #   We'll give the connection a few tries before abandoning it.  If
       #   connection is not possible, we'll con_lost back to the client.
       #   
       my $client;
       for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
    $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",
         Type    => SOCK_STREAM,
         Timeout => 10);
    if($client) {
       last; # Connected!
    }
    sleep(1); # Try again later if failed connection.
       }
       my $answer;
       if ($client) {
    print $client "$cmd\n";
    $answer=<$client>;
    if (!$answer) { $answer="con_lost"; }
    chomp($answer);
       } else {
    $answer = 'con_lost'; # Failed connection.
       }
     return $answer;      return $answer;
 }  }
   
Line 137  sub reply { Line 158  sub reply {
     my ($cmd,$server)=@_;      my ($cmd,$server)=@_;
     unless (defined($hostname{$server})) { return 'no_such_host'; }      unless (defined($hostname{$server})) { return 'no_such_host'; }
     my $answer=subreply($cmd,$server);      my $answer=subreply($cmd,$server);
     if ($answer eq 'con_lost') {  
         #sleep 5;   
         #$answer=subreply($cmd,$server);  
         #if ($answer eq 'con_lost') {  
  #   &logthis("Second attempt con_lost on $server");  
         #   my $peerfile="$perlvar{'lonSockDir'}/$server";  
         #   my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",  
         #                                    Type    => SOCK_STREAM,  
         #                                    Timeout => 10)  
         #              or return "con_lost";  
         #   &logthis("Killing socket");  
         #   print $client "close_connection_exit\n";  
            #sleep 5;  
         #   $answer=subreply($cmd,$server);         
        #}     
     }  
     if (($answer=~/^refused/) || ($answer=~/^rejected/)) {      if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
        &logthis("<font color=blue>WARNING:".         &logthis("<font color=blue>WARNING:".
                 " $cmd to $server returned $answer</font>");                  " $cmd to $server returned $answer</font>");
Line 166  sub reconlonc { Line 171  sub reconlonc {
     my $peerfile=shift;      my $peerfile=shift;
     &logthis("Trying to reconnect for $peerfile");      &logthis("Trying to reconnect for $peerfile");
     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";      my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
     if (my $fh=Apache::File->new("$loncfile")) {      if (open(my $fh,"<$loncfile")) {
  my $loncpid=<$fh>;   my $loncpid=<$fh>;
         chomp($loncpid);          chomp($loncpid);
         if (kill 0 => $loncpid) {          if (kill 0 => $loncpid) {
Line 200  sub critical { Line 205  sub critical {
     }      }
     my $answer=reply($cmd,$server);      my $answer=reply($cmd,$server);
     if ($answer eq 'con_lost') {      if ($answer eq 'con_lost') {
         my $pingreply=reply('ping',$server);  
  &reconlonc("$perlvar{'lonSockDir'}/$server");   &reconlonc("$perlvar{'lonSockDir'}/$server");
         my $pongreply=reply('pong',$server);   my $answer=reply($cmd,$server);
         &logthis("Ping/Pong for $server: $pingreply/$pongreply");  
         $answer=reply($cmd,$server);  
         if ($answer eq 'con_lost') {          if ($answer eq 'con_lost') {
             my $now=time;              my $now=time;
             my $middlename=$cmd;              my $middlename=$cmd;
Line 214  sub critical { Line 216  sub critical {
       "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";        "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
             $dumpcount++;              $dumpcount++;
             {              {
              my $dfh;   my $dfh;
              if ($dfh=Apache::File->new(">$dfilename")) {   if (open($dfh,">$dfilename")) {
                 print $dfh "$cmd\n";      print $dfh "$cmd\n"; 
      }      close($dfh);
    }
             }              }
             sleep 2;              sleep 2;
             my $wcmd='';              my $wcmd='';
             {              {
      my $dfh;   my $dfh;
              if ($dfh=Apache::File->new("$dfilename")) {   if (open($dfh,"<$dfilename")) {
                 $wcmd=<$dfh>;      $wcmd=<$dfh>; 
      }      close($dfh);
    }
             }              }
             chomp($wcmd);              chomp($wcmd);
             if ($wcmd eq $cmd) {              if ($wcmd eq $cmd) {
Line 243  sub critical { Line 247  sub critical {
     }      }
     return $answer;      return $answer;
 }  }
   
   #
   # -------------- Remove all key from the env that start witha lowercase letter
   #                (Which is always a lon-capa value)
   
   sub cleanenv {
   #    unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
   #    unless (&Apache::exists_config_define("MODPERL2")) { return; }
       foreach my $key (keys(%ENV)) {
    if ($key =~ /^[a-z]/) {
       delete($ENV{$key});
    }
       }
   }
     
 # ------------------------------------------- Transfer profile into environment  # ------------------------------------------- Transfer profile into environment
   
Line 250  sub transfer_profile_to_env { Line 268  sub transfer_profile_to_env {
     my ($lonidsdir,$handle)=@_;      my ($lonidsdir,$handle)=@_;
     my @profile;      my @profile;
     {      {
  my $idf=Apache::File->new("$lonidsdir/$handle.id");   open(my $idf,"$lonidsdir/$handle.id");
  flock($idf,LOCK_SH);   flock($idf,LOCK_SH);
  @profile=<$idf>;   @profile=<$idf>;
  $idf->close();   close($idf);
     }      }
     my $envi;      my $envi;
       my %Remove;
     for ($envi=0;$envi<=$#profile;$envi++) {      for ($envi=0;$envi<=$#profile;$envi++) {
  chomp($profile[$envi]);   chomp($profile[$envi]);
  my ($envname,$envvalue)=split(/=/,$profile[$envi]);   my ($envname,$envvalue)=split(/=/,$profile[$envi]);
  $ENV{$envname} = $envvalue;   $ENV{$envname} = $envvalue;
           if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
               if ($time < time-300) {
                   $Remove{$key}++;
               }
           }
     }      }
     $ENV{'user.environment'} = "$lonidsdir/$handle.id";      $ENV{'user.environment'} = "$lonidsdir/$handle.id";
       foreach my $expired_key (keys(%Remove)) {
           &delenv($expired_key);
       }
 }  }
   
 # ---------------------------------------------------------- Append Environment  # ---------------------------------------------------------- Append Environment
Line 280  sub appenv { Line 307  sub appenv {
     }      }
   
     my $lockfh;      my $lockfh;
     unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {      unless (open($lockfh,"$ENV{'user.environment'}")) {
        return 'error: '.$!;   return 'error: '.$!;
     }      }
     unless (flock($lockfh,LOCK_EX)) {      unless (flock($lockfh,LOCK_EX)) {
          &logthis("<font color=blue>WARNING: ".           &logthis("<font color=blue>WARNING: ".
                   'Could not obtain exclusive lock in appenv: '.$!);                    'Could not obtain exclusive lock in appenv: '.$!);
          $lockfh->close();           close($lockfh);
          return 'error: '.$!;           return 'error: '.$!;
     }      }
   
     my @oldenv;      my @oldenv;
     {      {
      my $fh;   my $fh;
      unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {   unless (open($fh,"$ENV{'user.environment'}")) {
  return 'error: '.$!;      return 'error: '.$!;
      }   }
      @oldenv=<$fh>;   @oldenv=<$fh>;
      $fh->close();   close($fh);
     }      }
     for (my $i=0; $i<=$#oldenv; $i++) {      for (my $i=0; $i<=$#oldenv; $i++) {
         chomp($oldenv[$i]);          chomp($oldenv[$i]);
         if ($oldenv[$i] ne '') {          if ($oldenv[$i] ne '') {
            my ($name,$value)=split(/=/,$oldenv[$i]);      my ($name,$value)=split(/=/,$oldenv[$i]);
            unless (defined($newenv{$name})) {      unless (defined($newenv{$name})) {
       $newenv{$name}=$value;   $newenv{$name}=$value;
    }      }
         }          }
     }      }
     {      {
      my $fh;   my $fh;
      unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {   unless (open($fh,">$ENV{'user.environment'}")) {
  return 'error';      return 'error';
      }   }
      my $newname;   my $newname;
      foreach $newname (keys %newenv) {   foreach $newname (keys %newenv) {
  print $fh "$newname=$newenv{$newname}\n";      print $fh "$newname=$newenv{$newname}\n";
      }   }
      $fh->close();   close($fh);
     }      }
   
     $lockfh->close();      close($lockfh);
     return 'ok';      return 'ok';
 }  }
 # ----------------------------------------------------- Delete from Environment  # ----------------------------------------------------- Delete from Environment
Line 335  sub delenv { Line 362  sub delenv {
     }      }
     my @oldenv;      my @oldenv;
     {      {
      my $fh;   my $fh;
      unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {   unless (open($fh,"$ENV{'user.environment'}")) {
  return 'error';      return 'error';
      }   }
      unless (flock($fh,LOCK_SH)) {   unless (flock($fh,LOCK_SH)) {
          &logthis("<font color=blue>WARNING: ".      &logthis("<font color=blue>WARNING: ".
                   'Could not obtain shared lock in delenv: '.$!);       'Could not obtain shared lock in delenv: '.$!);
          $fh->close();      close($fh);
          return 'error: '.$!;      return 'error: '.$!;
      }   }
      @oldenv=<$fh>;   @oldenv=<$fh>;
      $fh->close();   close($fh);
     }      }
     {      {
      my $fh;   my $fh;
      unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {   unless (open($fh,">$ENV{'user.environment'}")) {
  return 'error';      return 'error';
      }   }
      unless (flock($fh,LOCK_EX)) {   unless (flock($fh,LOCK_EX)) {
          &logthis("<font color=blue>WARNING: ".      &logthis("<font color=blue>WARNING: ".
                   'Could not obtain exclusive lock in delenv: '.$!);       'Could not obtain exclusive lock in delenv: '.$!);
          $fh->close();      close($fh);
          return 'error: '.$!;      return 'error: '.$!;
      }   }
      foreach (@oldenv) {   foreach (@oldenv) {
  unless ($_=~/^$delthis/) { print $fh $_; }      if ($_=~/^$delthis/) { 
      }                  my ($key,undef) = split('=',$_);
      $fh->close();                  delete($ENV{$key});
               } else {
                   print $fh $_; 
               }
    }
    close($fh);
     }      }
     return 'ok';      return 'ok';
 }  }
Line 377  sub userload { Line 409  sub userload {
  my $curtime=time;   my $curtime=time;
  while ($filename=readdir(LONIDS)) {   while ($filename=readdir(LONIDS)) {
     if ($filename eq '.' || $filename eq '..') {next;}      if ($filename eq '.' || $filename eq '..') {next;}
     my ($atime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[8];      my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
     if ($curtime-$atime < 3600) { $numusers++; }      if ($curtime-$mtime < 1800) { $numusers++; }
  }   }
  closedir(LONIDS);   closedir(LONIDS);
     }      }
Line 398  sub overloaderror { Line 430  sub overloaderror {
     unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }      unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
     my $loadavg;      my $loadavg;
     if ($checkserver eq $perlvar{'lonHostID'}) {      if ($checkserver eq $perlvar{'lonHostID'}) {
        my $loadfile=Apache::File->new('/proc/loadavg');         open(my $loadfile,'/proc/loadavg');
        $loadavg=<$loadfile>;         $loadavg=<$loadfile>;
        $loadavg =~ s/\s.*//g;         $loadavg =~ s/\s.*//g;
        $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};         $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
          close($loadfile);
     } else {      } else {
        $loadavg=&reply('load',$checkserver);         $loadavg=&reply('load',$checkserver);
     }      }
Line 424  sub spareserver { Line 457  sub spareserver {
     my $lowestserver=$loadpercent > $userloadpercent?      my $lowestserver=$loadpercent > $userloadpercent?
              $loadpercent :  $userloadpercent;               $loadpercent :  $userloadpercent;
     foreach $tryserver (keys %spareid) {      foreach $tryserver (keys %spareid) {
        my $loadans=reply('load',$tryserver);   my $loadans=reply('load',$tryserver);
        my $userloadans=reply('userload',$tryserver);   my $userloadans=reply('userload',$tryserver);
        if ($userloadans !~ /\d/) { $userloadans=0; }   if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
        my $answer=$loadans > $userloadans?      next; #didn't get a number from the server
                   $loadans :  $userloadans;   }
        if (($answer =~ /\d/) && ($answer<$lowestserver)) {   my $answer;
    $spareserver="http://$hostname{$tryserver}";   if ($loadans =~ /\d/) {
            $lowestserver=$answer;      if ($userloadans =~ /\d/) {
        }   #both are numbers, pick the bigger one
    $answer=$loadans > $userloadans?
       $loadans :  $userloadans;
       } else {
    $answer = $loadans;
       }
    } else {
       $answer = $userloadans;
    }
    if (($answer =~ /\d/) && ($answer<$lowestserver)) {
       $spareserver="http://$hostname{$tryserver}";
       $lowestserver=$answer;
    }
     }      }
     return $spareserver;      return $spareserver;
 }  }
Line 476  sub changepass { Line 521  sub changepass {
   
 sub queryauthenticate {  sub queryauthenticate {
     my ($uname,$udom)=@_;      my ($uname,$udom)=@_;
     if (($perlvar{'lonRole'} eq 'library') &&       my $uhome=&homeserver($uname,$udom);
         ($udom eq $perlvar{'lonDefDomain'})) {      if (!$uhome) {
  my $answer=reply("encrypt:currentauth:$udom:$uname",   &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
  $perlvar{'lonHostID'});   return 'no_host';
  unless ($answer eq 'unknown_user' or $answer eq 'refused') {      }
     if (length($answer)) {      my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
  return $answer;      if ($answer =~ /^(unknown_user|refused|con_lost)/) {
     }   &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
     else {  
  &logthis("User $uname at $udom lacks an authentication mechanism");  
  return 'no_host';  
     }  
  }  
     }  
   
     my $tryserver;  
     foreach $tryserver (keys %libserv) {  
  if ($hostdom{$tryserver} eq $udom) {  
            my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);  
    unless ($answer eq 'unknown_user' or $answer eq 'refused') {  
        if (length($answer)) {  
    return $answer;  
        }  
        else {  
    &logthis("User $uname at $udom lacks an authentication mechanism");  
    return 'no_host';  
        }  
    }  
        }  
     }      }
     &logthis("User $uname at $udom lacks an authentication mechanism");          return $answer;
     return 'no_host';  
 }  }
   
 # --------- Try to authenticate user from domain's lib servers (first this one)  # --------- Try to authenticate user from domain's lib servers (first this one)
Line 516  sub authenticate { Line 539  sub authenticate {
     my ($uname,$upass,$udom)=@_;      my ($uname,$upass,$udom)=@_;
     $upass=escape($upass);      $upass=escape($upass);
     $uname=~s/\W//g;      $uname=~s/\W//g;
     if (($perlvar{'lonRole'} eq 'library') &&       my $uhome=&homeserver($uname,$udom);
         ($udom eq $perlvar{'lonDefDomain'})) {      if (!$uhome) {
     my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});   &logthis("User $uname at $udom is unknown in authenticate");
         if ($answer =~ /authorized/) {   return 'no_host';
               if ($answer eq 'authorized') {      }
                  &logthis("User $uname at $udom authorized by local server");       my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
                  return $perlvar{'lonHostID'};       if ($answer eq 'authorized') {
               }   &logthis("User $uname at $udom authorized by $uhome"); 
               if ($answer eq 'non_authorized') {   return $uhome; 
                  &logthis("User $uname at $udom rejected by local server");       }
                  return 'no_host';       if ($answer eq 'non_authorized') {
               }   &logthis("User $uname at $udom rejected by $uhome");
  }   return 'no_host'; 
     }  
   
     my $tryserver;  
     foreach $tryserver (keys %libserv) {  
  if ($hostdom{$tryserver} eq $udom) {  
            my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);  
            if ($answer =~ /authorized/) {  
               if ($answer eq 'authorized') {  
                  &logthis("User $uname at $udom authorized by $tryserver");   
                  return $tryserver;   
               }  
               if ($answer eq 'non_authorized') {  
                  &logthis("User $uname at $udom rejected by $tryserver");  
                  return 'no_host';  
               }   
    }  
        }  
     }      }
     &logthis("User $uname at $udom could not be authenticated");          &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
     return 'no_host';      return 'no_host';
 }  }
   
 # ---------------------- Find the homebase for a user from domain's lib servers  # ---------------------- Find the homebase for a user from domain's lib servers
   
   my %homecache;
 sub homeserver {  sub homeserver {
     my ($uname,$udom,$ignoreBadCache)=@_;      my ($uname,$udom,$ignoreBadCache)=@_;
     my $index="$uname:$udom";      my $index="$uname:$udom";
     if ($homecache{$index}) {   
         return "$homecache{$index}";       if (exists($homecache{$index})) { return $homecache{$index}; }
     }  
     my $tryserver;      my $tryserver;
     foreach $tryserver (keys %libserv) {      foreach $tryserver (keys %libserv) {
         next if ($ignoreBadCache ne 'true' &&           next if ($ignoreBadCache ne 'true' && 
Line 566  sub homeserver { Line 572  sub homeserver {
  if ($hostdom{$tryserver} eq $udom) {   if ($hostdom{$tryserver} eq $udom) {
            my $answer=reply("home:$udom:$uname",$tryserver);             my $answer=reply("home:$udom:$uname",$tryserver);
            if ($answer eq 'found') {              if ($answer eq 'found') { 
               $homecache{$index}=$tryserver;         return $homecache{$index}=$tryserver;
               return $tryserver;   
            } elsif ($answer eq 'no_host') {             } elsif ($answer eq 'no_host') {
        $badServerCache{$tryserver}=1;         $badServerCache{$tryserver}=1;
            }             }
Line 620  sub idput { Line 625  sub idput {
     my ($udom,%ids)=@_;      my ($udom,%ids)=@_;
     my %servers=();      my %servers=();
     foreach (keys %ids) {      foreach (keys %ids) {
    &cput('environment',{'id'=>$ids{$_}},$udom,$_);
         my $uhom=&homeserver($_,$udom);          my $uhom=&homeserver($_,$udom);
         if ($uhom ne 'no_host') {          if ($uhom ne 'no_host') {
             my $id=&escape($ids{$_});              my $id=&escape($ids{$_});
Line 630  sub idput { Line 636  sub idput {
             } else {              } else {
                 $servers{$uhom}=$id.'='.$unam;                  $servers{$uhom}=$id.'='.$unam;
             }              }
             &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);  
         }          }
     }      }
     foreach (keys %servers) {      foreach (keys %servers) {
Line 645  sub assign_access_key { Line 650  sub assign_access_key {
 # a valid key looks like uname:udom#comments  # a valid key looks like uname:udom#comments
 # comments are being appended  # comments are being appended
 #  #
     my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;      my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
       $kdom=
      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
       $knum=
      $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
     $cdom=      $cdom=
    $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));     $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
     $cnum=      $cnum=
    $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));     $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
     $udom=$ENV{'user.name'} unless (defined($udom));      $udom=$ENV{'user.name'} unless (defined($udom));
     $uname=$ENV{'user.domain'} unless (defined($uname));      $uname=$ENV{'user.domain'} unless (defined($uname));
     my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);      my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
     if (($existing{$ckey}=~/^\#(.*)$/) || # - new key      if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
         ($existing{$ckey}=~/^$uname\:$udom\#(.*)$/)) {           ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) { 
                                                   # assigned to this person                                                    # assigned to this person
                                                   # - this should not happen,                                                    # - this should not happen,
                                                   # unless something went wrong                                                    # unless something went wrong
                                                   # the first time around                                                    # the first time around
 # ready to assign  # ready to assign
         $logentry=$1.'; '.$logentry;          $logentry=$1.'; '.$logentry;
         if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},          if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
                                                  $cdom,$cnum) eq 'ok') {                                                   $kdom,$knum) eq 'ok') {
 # key now belongs to user  # key now belongs to user
     my $envkey='key.'.$cdom.'_'.$cnum;      my $envkey='key.'.$cdom.'_'.$cnum;
             if (&put('environment',{$envkey => $ckey}) eq 'ok') {              if (&put('environment',{$envkey => $ckey}) eq 'ok') {
Line 758  sub validate_access_key { Line 767  sub validate_access_key {
    $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));     $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
     $cnum=      $cnum=
    $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));     $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
     $udom=$ENV{'user.name'} unless (defined($udom));      $udom=$ENV{'user.domain'} unless (defined($udom));
     $uname=$ENV{'user.domain'} unless (defined($uname));      $uname=$ENV{'user.name'} unless (defined($uname));
     my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);      my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
     return ($existing{$ckey}=~/^$uname\:$udom\#/);      return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
 }  }
   
 # ------------------------------------- Find the section of student in a course  # ------------------------------------- Find the section of student in a course
   
 sub getsection {  sub getsection {
     my ($udom,$unam,$courseid)=@_;      my ($udom,$unam,$courseid)=@_;
       my $cachetime=1800;
     $courseid=~s/\_/\//g;      $courseid=~s/\_/\//g;
     $courseid=~s/^(\w)/\/$1/;      $courseid=~s/^(\w)/\/$1/;
   
       my $hashid="$udom:$unam:$courseid";
       my ($result,$cached)=&is_cached_new('getsection',$hashid);
       if (defined($cached)) { return $result; }
   
     my %Pending;       my %Pending; 
     my %Expired;      my %Expired;
     #      #
Line 789  sub getsection { Line 804  sub getsection {
                         &homeserver($unam,$udom)))) {                          &homeserver($unam,$udom)))) {
         my ($key,$value)=split(/\=/,$_);          my ($key,$value)=split(/\=/,$_);
         $key=&unescape($key);          $key=&unescape($key);
         next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);          next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
         my $section=$1;          my $section=$1;
         if ($key eq $courseid.'_st') { $section=''; }          if ($key eq $courseid.'_st') { $section=''; }
         my ($dummy,$end,$start)=split(/\_/,&unescape($value));          my ($dummy,$end,$start)=split(/\_/,&unescape($value));
         my $now=time;          my $now=time;
         if (defined($end) && ($now > $end)) {          if (defined($end) && $end && ($now > $end)) {
             $Expired{$end}=$section;              $Expired{$end}=$section;
             next;              next;
         }          }
         if (defined($start) && ($now < $start)) {          if (defined($start) && $start && ($now < $start)) {
             $Pending{$start}=$section;              $Pending{$start}=$section;
             next;              next;
         }          }
         return $section;          return &do_cache_new('getsection',$hashid,$section,$cachetime);
     }      }
     #      #
     # Presumedly there will be few matching roles from the above      # Presumedly there will be few matching roles from the above
     # loop and the sorting time will be negligible.      # loop and the sorting time will be negligible.
     if (scalar(keys(%Pending))) {      if (scalar(keys(%Pending))) {
         my ($time) = sort {$a <=> $b} keys(%Pending);          my ($time) = sort {$a <=> $b} keys(%Pending);
         return $Pending{$time};          return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
     }       } 
     if (scalar(keys(%Expired))) {      if (scalar(keys(%Expired))) {
         my @sorted = sort {$a <=> $b} keys(%Expired);          my @sorted = sort {$a <=> $b} keys(%Expired);
         my $time = pop(@sorted);          my $time = pop(@sorted);
         return $Expired{$time};          return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
     }      }
     return '-1';      return &do_cache_new('getsection',$hashid,'-1',$cachetime);
 }  }
   
 sub usection {  sub save_cache {
     my ($udom,$unam,$courseid)=@_;      &purge_remembered();
     $courseid=~s/\_/\//g;  }
     $courseid=~s/^(\w)/\/$1/;  
     foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',  my $to_remember=-1;
                         &homeserver($unam,$udom)))) {  my %remembered;
         my ($key,$value)=split(/\=/,$_);  my %accessed;
         $key=&unescape($key);  my $kicks=0;
         if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {  my $hits=0;
             my $section=$1;  sub devalidate_cache_new {
             if ($key eq $courseid.'_st') { $section=''; }      my ($name,$id,$debug) = @_;
     my ($dummy,$end,$start)=split(/\_/,&unescape($value));      if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
             my $now=time;      $id=&escape($name.':'.$id);
             my $notactive=0;      $memcache->delete($id);
             if ($start) {      delete($remembered{$id});
  if ($now<$start) { $notactive=1; }      delete($accessed{$id});
             }  }
             if ($end) {  
                 if ($now>$end) { $notactive=1; }  sub is_cached_new {
             }       my ($name,$id,$debug) = @_;
             unless ($notactive) { return $section; }      $id=&escape($name.':'.$id);
         }      if (exists($remembered{$id})) {
    if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
    $accessed{$id}=[&gettimeofday()];
    $hits++;
    return ($remembered{$id},1);
       }
       my $value = $memcache->get($id);
       if (!(defined($value))) {
    if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
    return (undef,undef);
       }
       if ($value eq '__undef__') {
    if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
    $value=undef;
       }
       &make_room($id,$value,$debug);
       if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
       return ($value,1);
   }
   
   sub do_cache_new {
       my ($name,$id,$value,$time,$debug) = @_;
       $id=&escape($name.':'.$id);
       my $setvalue=$value;
       if (!defined($setvalue)) {
    $setvalue='__undef__';
       }
       if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
       $memcache->set($id,$setvalue,$time);
       # need to make a copy of $value
       #&make_room($id,$value,$debug);
       return $value;
   }
   
   sub make_room {
       my ($id,$value,$debug)=@_;
       $remembered{$id}=$value;
       if ($to_remember<0) { return; }
       $accessed{$id}=[&gettimeofday()];
       if (scalar(keys(%remembered)) <= $to_remember) { return; }
       my $to_kick;
       my $max_time=0;
       foreach my $other (keys(%accessed)) {
    if (&tv_interval($accessed{$other}) > $max_time) {
       $to_kick=$other;
       $max_time=&tv_interval($accessed{$other});
    }
     }      }
     return '-1';      delete($remembered{$to_kick});
       delete($accessed{$to_kick});
       $kicks++;
       if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
       return;
 }  }
   
   sub purge_remembered {
       #&logthis("Tossing ".scalar(keys(%remembered)));
       #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
       undef(%remembered);
       undef(%accessed);
   }
 # ------------------------------------- Read an entry from a user's environment  # ------------------------------------- Read an entry from a user's environment
   
 sub userenvironment {  sub userenvironment {
Line 882  sub getversion { Line 953  sub getversion {
   
 sub currentversion {  sub currentversion {
     my $fname=shift;      my $fname=shift;
       my ($result,$cached)=&is_cached_new('resversion',$fname);
       if (defined($cached)) { return $result; }
     my $author=$fname;      my $author=$fname;
     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;      $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
     my ($udom,$uname)=split(/\//,$author);      my ($udom,$uname)=split(/\//,$author);
Line 893  sub currentversion { Line 966  sub currentversion {
     if (($answer eq 'con_lost') || ($answer eq 'rejected')) {      if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
  return -1;   return -1;
     }      }
     return $answer;      return &do_cache_new('resversion',$fname,$answer,600);
 }  }
   
 # ----------------------------- Subscribe to a resource, return URL if possible  # ----------------------------- Subscribe to a resource, return URL if possible
Line 901  sub currentversion { Line 974  sub currentversion {
 sub subscribe {  sub subscribe {
     my $fname=shift;      my $fname=shift;
     if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }      if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
       $fname=~s/[\n\r]//g;
     my $author=$fname;      my $author=$fname;
     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;      $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
     my ($udom,$uname)=split(/\//,$author);      my ($udom,$uname)=split(/\//,$author);
Line 920  sub subscribe { Line 994  sub subscribe {
 sub repcopy {  sub repcopy {
     my $filename=shift;      my $filename=shift;
     $filename=~s/\/+/\//g;      $filename=~s/\/+/\//g;
     if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }      if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
       if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
       if ($filename=~m|^/home/httpd/html/userfiles/| or
    $filename=~m -^/*(uploaded|editupload)/-) { 
    return &repcopy_userfile($filename);
       }
       $filename=~s/[\n\r]//g;
     my $transname="$filename.in.transfer";      my $transname="$filename.in.transfer";
     if ((-e $filename) || (-e $transname)) { return OK; }      if ((-e $filename) || (-e $transname)) { return 'ok'; }
     my $remoteurl=subscribe($filename);      my $remoteurl=subscribe($filename);
     if ($remoteurl =~ /^con_lost by/) {      if ($remoteurl =~ /^con_lost by/) {
    &logthis("Subscribe returned $remoteurl: $filename");     &logthis("Subscribe returned $remoteurl: $filename");
            return HTTP_SERVICE_UNAVAILABLE;             return 'unavailable';
     } elsif ($remoteurl eq 'not_found') {      } elsif ($remoteurl eq 'not_found') {
    &logthis("Subscribe returned not_found: $filename");     #&logthis("Subscribe returned not_found: $filename");
    return HTTP_NOT_FOUND;     return 'not_found';
     } elsif ($remoteurl =~ /^rejected by/) {      } elsif ($remoteurl =~ /^rejected by/) {
    &logthis("Subscribe returned $remoteurl: $filename");     &logthis("Subscribe returned $remoteurl: $filename");
            return FORBIDDEN;             return 'forbidden';
     } elsif ($remoteurl eq 'directory') {      } elsif ($remoteurl eq 'directory') {
            return OK;             return 'ok';
     } else {      } else {
         my $author=$filename;          my $author=$filename;
         $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;          $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
Line 945  sub repcopy { Line 1025  sub repcopy {
            my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";             my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
            if ($path ne "$perlvar{'lonDocRoot'}/res") {             if ($path ne "$perlvar{'lonDocRoot'}/res") {
                &logthis("Malconfiguration for replication: $filename");                 &logthis("Malconfiguration for replication: $filename");
        return HTTP_BAD_REQUEST;         return 'bad_request';
            }             }
            my $count;             my $count;
            for ($count=5;$count<$#parts;$count++) {             for ($count=5;$count<$#parts;$count++) {
Line 962  sub repcopy { Line 1042  sub repcopy {
                my $message=$response->status_line;                 my $message=$response->status_line;
                &logthis("<font color=blue>WARNING:"                 &logthis("<font color=blue>WARNING:"
                        ." LWP get: $message: $filename</font>");                         ." LWP get: $message: $filename</font>");
                return HTTP_SERVICE_UNAVAILABLE;                 return 'unavailable';
            } else {             } else {
        if ($remoteurl!~/\.meta$/) {         if ($remoteurl!~/\.meta$/) {
                   my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');                    my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
Line 974  sub repcopy { Line 1054  sub repcopy {
                   }                    }
        }         }
                rename($transname,$filename);                 rename($transname,$filename);
                return OK;                 return 'ok';
            }             }
        }         }
     }      }
Line 983  sub repcopy { Line 1063  sub repcopy {
 # ------------------------------------------------ Get server side include body  # ------------------------------------------------ Get server side include body
 sub ssi_body {  sub ssi_body {
     my ($filelink,%form)=@_;      my ($filelink,%form)=@_;
       if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
           $form{'LONCAPA_INTERNAL_no_discussion'}='true';
       }
     my $output=($filelink=~/^http\:/?&externalssi($filelink):      my $output=($filelink=~/^http\:/?&externalssi($filelink):
                                      &ssi($filelink,%form));                                       &ssi($filelink,%form));
     $output=~s/^.*\<body[^\>]*\>//si;      $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
     $output=~s/\<\/body\s*\>.*$//si;      $output=~s/^.*?\<body[^\>]*\>//si;
     $output=~      $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
             s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;  
     return $output;      return $output;
 }  }
   
Line 1023  sub externalssi { Line 1105  sub externalssi {
     return $response->content;      return $response->content;
 }  }
   
 # ------- Add a token to a remote URI's query string to vouch for access rights  # -------------------------------- Allow a /uploaded/ URI to be vouched for
   
 sub tokenwrapper {  sub allowuploaded {
     my $uri=shift;      my ($srcurl,$url)=@_;
     $uri=~s/^http\:\/\/([^\/]+)//;      $url=&clutter(&declutter($url));
     $uri=~s/^\///;      my $dir=$url;
     $ENV{'user.environment'}=~/\/([^\/]+)\.id/;      $dir=~s/\/[^\/]+$//;
     my $token=$1;      my %httpref=();
     if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {      my $httpurl=&hreflocation('',$url);
  &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});      $httpref{'httpref.'.$httpurl}=$srcurl;
         return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.      &Apache::lonnet::appenv(%httpref);
                (($uri=~/\?/)?'&':'?').'token='.$token.  }
                                '&tokenissued='.$perlvar{'lonHostID'};  
   # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
   # input: action, courseID, current domain, home server for course, intended
   #        path to file, source of file.
   # output: url to file (if action was uploaddoc), 
   #         ok if successful, or diagnostic message otherwise (if action was propagate or copy)
   #
   # Allows directory structure to be used within lonUsers/../userfiles/ for a 
   # course.
   #
   # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
   #          will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
   #          course's home server.
   #
   # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
   #          be copied from $source (current location) to 
   #          /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
   #         and will then be copied to
   #          /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
   #         course's home server.
   #
   # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
   #         will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
   #         /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
   #         and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
   #         in course's home server.
   
   
   sub process_coursefile {
       my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
       my $fetchresult;
       if ($action eq 'propagate') {
           $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
                               ,$docuhome);
     } else {      } else {
  return '/adm/notfound.html';          my $fetchresult = '';
           my $fpath = '';
           my $fname = $file;
           ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
           $fpath=$docudom.'/'.$docuname.'/'.$fpath;
           my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
           unless ($fpath eq '') {
               my @parts=split('/',$fpath);
               foreach my $part (@parts) {
                   $filepath.= '/'.$part;
                   if ((-e $filepath)!=1) {
                       mkdir($filepath,0777);
                   }
               }
           }
           if ($action eq 'copy') {
               if ($source eq '') {
                   $fetchresult = 'no source file';
                   return $fetchresult;
               } else {
                   my $destination = $filepath.'/'.$fname;
                   rename($source,$destination);
                   $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
                                    $docuhome);
               }
           } elsif ($action eq 'uploaddoc') {
               open(my $fh,'>'.$filepath.'/'.$fname);
               print $fh $ENV{'form.'.$source};
               close($fh);
               $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
                                    $docuhome);
               if ($fetchresult eq 'ok') {
                   return '/uploaded/'.$fpath.'/'.$fname;
               } else {
                   &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
                           ' to host '.$docuhome.': '.$fetchresult);
                   return '/adm/notfound.html';
               }
           }
       }
       unless ( $fetchresult eq 'ok') {
           &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
                ' to host '.$docuhome.': '.$fetchresult);
     }      }
       return $fetchresult;
 }  }
       
 # --------------- Take an uploaded file and put it into the userfiles directory  
 # input: name of form element, coursedoc=1 means this is for the course  
 # output: url of file in userspace  
   
 sub userfileupload {  sub clean_filename {
     my ($formname,$coursedoc)=@_;      my ($fname)=@_;
     my $fname=$ENV{'form.'.$formname.'.filename'};  
 # Replace Windows backslashes by forward slashes  # Replace Windows backslashes by forward slashes
     $fname=~s/\\/\//g;      $fname=~s/\\/\//g;
 # Get rid of everything but the actual filename  # Get rid of everything but the actual filename
Line 1056  sub userfileupload { Line 1209  sub userfileupload {
     $fname=~s/\s+/\_/g;      $fname=~s/\s+/\_/g;
 # Replace all other weird characters by nothing  # Replace all other weird characters by nothing
     $fname=~s/[^\w\.\-]//g;      $fname=~s/[^\w\.\-]//g;
   # Replace all .\d. sequences with _\d. so they no longer look like version
   # numbers
       $fname=~s/\.(\d+)(?=\.)/_$1/g;
       return $fname;
   }
   
   # --------------- 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,$subdir)=@_;
       if (!defined($subdir)) { $subdir='unknown'; }
       my $fname=$ENV{'form.'.$formname.'.filename'};
       $fname=&clean_filename($fname);
 # See if there is anything left  # See if there is anything left
     unless ($fname) { return 'error: no uploaded file'; }      unless ($fname) { return 'error: no uploaded file'; }
     chop($ENV{'form.'.$formname});      chop($ENV{'form.'.$formname});
       if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
           my $now = time;
           my $filepath = 'tmp/helprequests/'.$now;
           my @parts=split(/\//,$filepath);
           my $fullpath = $perlvar{'lonDaemons'};
           for (my $i=0;$i<@parts;$i++) {
               $fullpath .= '/'.$parts[$i];
               if ((-e $fullpath)!=1) {
                   mkdir($fullpath,0777);
               }
           }
           open(my $fh,'>'.$fullpath.'/'.$fname);
           print $fh $ENV{'form.'.$formname};
           close($fh);
           return $fullpath.'/'.$fname; 
       }
 # Create the directory if not present  # Create the directory if not present
     my $docuname='';      my $docuname='';
     my $docudom='';      my $docudom='';
     my $docuhome='';      my $docuhome='';
       $fname="$subdir/$fname";
     if ($coursedoc) {      if ($coursedoc) {
  $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};   $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
  $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};   $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
  $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};   $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
           if ($ENV{'form.folder'} =~ m/^default/) {
               return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
           } else {
               $fname=$ENV{'form.folder'}.'/'.$fname;
               return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
           }
     } else {      } else {
         $docuname=$ENV{'user.name'};          $docuname=$ENV{'user.name'};
         $docudom=$ENV{'user.domain'};          $docudom=$ENV{'user.domain'};
         $docuhome=$ENV{'user.home'};          $docuhome=$ENV{'user.home'};
           return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
     }      }
     return   
         &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);  
 }  }
   
 sub finishuserfileupload {  sub finishuserfileupload {
     my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;      my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
     my $path=$docudom.'/'.$docuname.'/';      my $path=$docudom.'/'.$docuname.'/';
     my $filepath=$perlvar{'lonDocRoot'};      my $filepath=$perlvar{'lonDocRoot'};
       my ($fnamepath,$file);
       $file=$fname;
       if ($fname=~m|/|) {
           ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
    $path.=$fnamepath.'/';
       }
     my @parts=split(/\//,$filepath.'/userfiles/'.$path);      my @parts=split(/\//,$filepath.'/userfiles/'.$path);
     my $count;      my $count;
     for ($count=4;$count<=$#parts;$count++) {      for ($count=4;$count<=$#parts;$count++) {
Line 1090  sub finishuserfileupload { Line 1287  sub finishuserfileupload {
     }      }
 # Save the file  # Save the file
     {      {
        my $fh=Apache::File->new('>'.$filepath.'/'.$fname);   open(FH,'>'.$filepath.'/'.$file);
        print $fh $ENV{'form.'.$formname};   print FH $ENV{'form.'.$formname};
    close(FH);
     }      }
 # Notify homeserver to grep it  # Notify homeserver to grep it
 #  #
           &Apache::lonnet::logthis("fetching ".$path.$file);
     my $fetchresult=       my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
  &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);  
     if ($fetchresult eq 'ok') {      if ($fetchresult eq 'ok') {
 #  #
 # Return the URL to it  # Return the URL to it
         return '/uploaded/'.$path.$fname;          return '/uploaded/'.$path.$file;
     } else {      } else {
         &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.          &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
          ' to host '.$docuhome.': '.$fetchresult);   ': '.$fetchresult);
         return '/adm/notfound.html';          return '/adm/notfound.html';
     }          }    
 }  }
   
   sub removeuploadedurl {
       my ($url)=@_;
       my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
       return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
   }
   
   sub removeuserfile {
       my ($docuname,$docudom,$fname)=@_;
       my $home=&homeserver($docuname,$docudom);
       return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
   }
   
   sub mkdiruserfile {
       my ($docuname,$docudom,$dir)=@_;
       my $home=&homeserver($docuname,$docudom);
       return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
   }
   
   sub renameuserfile {
       my ($docuname,$docudom,$old,$new)=@_;
       my $home=&homeserver($docuname,$docudom);
       return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
     &escape("$new"),$home);
   }
   
 # ------------------------------------------------------------------------- Log  # ------------------------------------------------------------------------- Log
   
 sub log {  sub log {
Line 1148  sub flushcourselogs { Line 1370  sub flushcourselogs {
         }          }
         if ($courseidbuffer{$coursehombuf{$crsid}}) {          if ($courseidbuffer{$coursehombuf{$crsid}}) {
            $courseidbuffer{$coursehombuf{$crsid}}.='&'.             $courseidbuffer{$coursehombuf{$crsid}}.='&'.
  &escape($crsid).'='.&escape($coursedescrbuf{$crsid});   &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
                            ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
         } else {          } else {
            $courseidbuffer{$coursehombuf{$crsid}}=             $courseidbuffer{$coursehombuf{$crsid}}=
  &escape($crsid).'='.&escape($coursedescrbuf{$crsid});   &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
         }                               ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
           }
     }      }
 #  #
 # Write course id database (reverse lookup) to homeserver of courses   # Write course id database (reverse lookup) to homeserver of courses 
Line 1165  sub flushcourselogs { Line 1389  sub flushcourselogs {
 # File accesses  # File accesses
 # Writes to the dynamic metadata of resources to get hit counts, etc.  # Writes to the dynamic metadata of resources to get hit counts, etc.
 #  #
     foreach (keys %accesshash) {      foreach my $entry (keys(%accesshash)) {
         my $entry=$_;          if ($entry =~ /___count$/) {
         $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;              my ($dom,$name);
         my %temphash=($entry => $accesshash{$entry});              ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
         if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {              if (! defined($dom) || $dom eq '' || 
     delete $accesshash{$entry};                  ! defined($name) || $name eq '') {
                   my $cid = $ENV{'request.course.id'};
                   $dom  = $ENV{'request.'.$cid.'.domain'};
                   $name = $ENV{'request.'.$cid.'.num'};
               }
               my $value = $accesshash{$entry};
               my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
               my %temphash=($url => $value);
               my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
               if ($result eq 'ok') {
                   delete $accesshash{$entry};
               } elsif ($result eq 'unknown_cmd') {
                   # Target server has old code running on it.
                   my %temphash=($entry => $value);
                   if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
                       delete $accesshash{$entry};
                   }
               }
           } else {
               my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
               my %temphash=($entry => $accesshash{$entry});
               if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
                   delete $accesshash{$entry};
               }
         }          }
     }      }
 #  #
Line 1202  sub courselog { Line 1449  sub courselog {
        $ENV{'course.'.$ENV{'request.course.id'}.'.home'};         $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
     $coursedescrbuf{$ENV{'request.course.id'}}=      $coursedescrbuf{$ENV{'request.course.id'}}=
        $ENV{'course.'.$ENV{'request.course.id'}.'.description'};         $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
       $courseinstcodebuf{$ENV{'request.course.id'}}=
          $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
       $courseownerbuf{$ENV{'request.course.id'}}=
          $ENV{'course.'.$ENV{'request.course.id'}.'.internal.courseowner'};
     if (defined $courselogs{$ENV{'request.course.id'}}) {      if (defined $courselogs{$ENV{'request.course.id'}}) {
  $courselogs{$ENV{'request.course.id'}}.='&'.$what;   $courselogs{$ENV{'request.course.id'}}.='&'.$what;
     } else {      } else {
Line 1216  sub courseacclog { Line 1467  sub courseacclog {
     my $fnsymb=shift;      my $fnsymb=shift;
     unless ($ENV{'request.course.id'}) { return ''; }      unless ($ENV{'request.course.id'}) { return ''; }
     my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};      my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
     if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {      if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
         $what.=':POST';          $what.=':POST';
           # FIXME: Probably ought to escape things....
  foreach (keys %ENV) {   foreach (keys %ENV) {
             if ($_=~/^form\.(.*)/) {              if ($_=~/^form\.(.*)/) {
  $what.=':'.$1.'='.$ENV{$_};   $what.=':'.$1.'='.$ENV{$_};
             }              }
         }          }
       } elsif ($fnsymb =~ m:^/adm/searchcat:) {
           # FIXME: We should not be depending on a form parameter that someone
           # editing lonsearchcat.pm might change in the future.
           if ($ENV{'form.phase'} eq 'course_search') {
               $what.= ':POST';
               # FIXME: Probably ought to escape things....
               foreach my $element ('courseexp','crsfulltext','crsrelated',
                                    'crsdiscuss') {
                   $what.=':'.$element.'='.$ENV{'form.'.$element};
               }
           }
     }      }
     &courselog($what);      &courselog($what);
 }  }
   
 sub countacc {  sub countacc {
     my $url=&declutter(shift);      my $url=&declutter(shift);
       return if (! defined($url) || $url eq '');
     unless ($ENV{'request.course.id'}) { return ''; }      unless ($ENV{'request.course.id'}) { return ''; }
     $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;      $accesshash{$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}++;
  $accesshash{$key}++;  
     } else {  
         $accesshash{$key}=1;  
     }  
 }  }
   
 sub linklog {  sub linklog {
Line 1251  sub userrolelog { Line 1511  sub userrolelog {
     my ($trole,$username,$domain,$area,$tstart,$tend)=@_;      my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
     if (($trole=~/^ca/) || ($trole=~/^in/) ||       if (($trole=~/^ca/) || ($trole=~/^in/) || 
         ($trole=~/^cc/) || ($trole=~/^ep/) ||          ($trole=~/^cc/) || ($trole=~/^ep/) ||
         ($trole=~/^cr/)) {          ($trole=~/^cr/) || ($trole=~/^ta/)) {
        my (undef,$rudom,$runame,$rsec)=split(/\//,$area);         my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
        $userrolehash         $userrolehash
          {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}           {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
Line 1263  sub get_course_adv_roles { Line 1523  sub get_course_adv_roles {
     my $cid=shift;      my $cid=shift;
     $cid=$ENV{'request.course.id'} unless (defined($cid));      $cid=$ENV{'request.course.id'} unless (defined($cid));
     my %coursehash=&coursedescription($cid);      my %coursehash=&coursedescription($cid);
       my %nothide=();
       foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
    $nothide{join(':',split(/[\@\:]/,$_))}=1;
       }
     my %returnhash=();      my %returnhash=();
     my %dumphash=      my %dumphash=
             &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});              &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
Line 1273  sub get_course_adv_roles { Line 1537  sub get_course_adv_roles {
         if (($tend) && ($tend<$now)) { next; }          if (($tend) && ($tend<$now)) { next; }
         if (($tstart) && ($now<$tstart)) { next; }          if (($tstart) && ($now<$tstart)) { next; }
         my ($role,$username,$domain,$section)=split(/\:/,$_);          my ($role,$username,$domain,$section)=split(/\:/,$_);
    if ($username eq '' || $domain eq '') { next; }
    if ((&privileged($username,$domain)) && 
       (!$nothide{$username.':'.$domain})) { next; }
         my $key=&plaintext($role);          my $key=&plaintext($role);
         if ($section) { $key.=' (Sec/Grp '.$section.')'; }          if ($section) { $key.=' (Sec/Grp '.$section.')'; }
         if ($returnhash{$key}) {          if ($returnhash{$key}) {
Line 1284  sub get_course_adv_roles { Line 1551  sub get_course_adv_roles {
     return %returnhash;      return %returnhash;
 }  }
   
   sub get_my_roles {
       my ($uname,$udom)=@_;
       unless (defined($uname)) { $uname=$ENV{'user.name'}; }
       unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
       my %dumphash=
               &dump('nohist_userroles',$udom,$uname);
       my %returnhash=();
       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,$section)=split(/\:/,$_);
    $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
        }
       return %returnhash;
   }
   
   # ----------------------------------------------------- Frontpage Announcements
   #
   #
   
   sub postannounce {
       my ($server,$text)=@_;
       unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
       unless ($text=~/\w/) { $text=''; }
       return &reply('setannounce:'.&escape($text),$server);
   }
   
   sub getannounce {
   
       if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
    my $announcement='';
    while (<$fh>) { $announcement .=$_; }
    close($fh);
    if ($announcement=~/\w/) { 
       return 
      '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
      '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>'; 
    } else {
       return '';
    }
       } else {
    return '';
       }
   }
   
 # ---------------------------------------------------------- Course ID routines  # ---------------------------------------------------------- Course ID routines
 # Deal with domain's nohist_courseid.db files  # Deal with domain's nohist_courseid.db files
 #  #
Line 1294  sub courseidput { Line 1609  sub courseidput {
 }  }
   
 sub courseiddump {  sub courseiddump {
     my ($domfilter,$descfilter,$sincefilter)=@_;      my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$hostidflag,$hostidref)=@_;
     my %returnhash=();      my %returnhash=();
     unless ($domfilter) { $domfilter=''; }      unless ($domfilter) { $domfilter=''; }
     foreach my $tryserver (keys %libserv) {      foreach my $tryserver (keys %libserv) {
  if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {          if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
     foreach (      if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
              split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.          foreach (
        $sincefilter.':'.&escape($descfilter),                   split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
          $sincefilter.':'.&escape($descfilter).':'.
                                  &escape($instcodefilter).':'.&escape($ownerfilter),
                                $tryserver))) {                                 $tryserver))) {
  my ($key,$value)=split(/\=/,$_);      my ($key,$value)=split(/\=/,$_);
                 if (($key) && ($value)) {                      if (($key) && ($value)) {
     $returnhash{&unescape($key)}=&unescape($value);          $returnhash{&unescape($key)}=$value;
                       }
                 }                  }
             }              }
   
         }          }
     }      }
     return %returnhash;      return %returnhash;
Line 1317  sub courseiddump { Line 1634  sub courseiddump {
 #  #
 # ----------------------------------------------------------- Check out an item  # ----------------------------------------------------------- Check out an item
   
   sub get_first_access {
       my ($type,$argsymb)=@_;
       my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
       if ($argsymb) { $symb=$argsymb; }
       my ($map,$id,$res)=&decode_symb($symb);
       if ($type eq 'map') {
    $res=&symbread($map);
       } else {
    $res=$symb;
       }
       my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
       return $times{"$courseid\0$res"};
   }
   
   sub set_first_access {
       my ($type)=@_;
       my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
       my ($map,$id,$res)=&decode_symb($symb);
       if ($type eq 'map') {
    $res=&symbread($map);
       } else {
    $res=$symb;
       }
       my $firstaccess=&get_first_access($type,$symb);
       if (!$firstaccess) {
    return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
       }
       return 'already_set';
   }
   
 sub checkout {  sub checkout {
     my ($symb,$tuname,$tudom,$tcrsid)=@_;      my ($symb,$tuname,$tudom,$tcrsid)=@_;
     my $now=time;      my $now=time;
Line 1370  sub checkin { Line 1717  sub checkin {
     my $now=time;      my $now=time;
     my ($ta,$tb,$lonhost)=split(/\*/,$token);      my ($ta,$tb,$lonhost)=split(/\*/,$token);
     $lonhost=~tr/A-Z/a-z/;      $lonhost=~tr/A-Z/a-z/;
     my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;      my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
     $dtoken=~s/\W/\_/g;      $dtoken=~s/\W/\_/g;
     my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=      my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
                  split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));                   split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
Line 1425  sub devalidate { Line 1772  sub devalidate {
     my ($symb,$uname,$udom)=@_;      my ($symb,$uname,$udom)=@_;
     my $cid=$ENV{'request.course.id'};       my $cid=$ENV{'request.course.id'}; 
     if ($cid) {      if ($cid) {
 # delete the stored spreadsheets for          # delete the stored spreadsheets for
 # - the student level sheet of this user in course's homespace          # - the student level sheet of this user in course's homespace
 # - the assessment level sheet for this resource           # - the assessment level sheet for this resource 
 #   for this user in user's homespace          #   for this user in user's homespace
    # - current conditional state info
  my $key=$uname.':'.$udom.':';   my $key=$uname.':'.$udom.':';
         my $status=          my $status=
     &del('nohist_calculatedsheets',      &del('nohist_calculatedsheets',
  [$key.'studentcalc'],   [$key.'studentcalc:'],
  $ENV{'course.'.$cid.'.domain'},   $ENV{'course.'.$cid.'.domain'},
  $ENV{'course.'.$cid.'.num'})   $ENV{'course.'.$cid.'.num'})
  .' '.   .' '.
     &del('nohist_calculatedsheets_'.$cid,      &del('nohist_calculatedsheets_'.$cid,
  [$key.'assesscalc:'.$symb]);   [$key.'assesscalc:'.$symb],$udom,$uname);
         unless ($status eq 'ok ok') {          unless ($status eq 'ok ok') {
            &logthis('Could not devalidate spreadsheet '.             &logthis('Could not devalidate spreadsheet '.
                     $uname.' at '.$udom.' for '.                      $uname.' at '.$udom.' for '.
     $symb.': '.$status);      $symb.': '.$status);
         }          }
    &delenv('user.state.'.$cid);
     }      }
 }  }
   
Line 1495  sub hash2str { Line 1844  sub hash2str {
 sub hashref2str {  sub hashref2str {
   my ($hashref)=@_;    my ($hashref)=@_;
   my $result='__HASH_REF__';    my $result='__HASH_REF__';
   foreach (keys(%$hashref)) {    foreach (sort(keys(%$hashref))) {
     if (ref($_) eq 'ARRAY') {      if (ref($_) eq 'ARRAY') {
       $result.=&arrayref2str($_).'=';        $result.=&arrayref2str($_).'=';
     } elsif (ref($_) eq 'HASH') {      } elsif (ref($_) eq 'HASH') {
Line 1651  sub tmpreset { Line 2000  sub tmpreset {
   $namespace=~s/\//\_/g;    $namespace=~s/\//\_/g;
   $namespace=~s/\W//g;    $namespace=~s/\W//g;
   
   #FIXME needs to do something for /pub resources  
   if (!$domain) { $domain=$ENV{'user.domain'}; }    if (!$domain) { $domain=$ENV{'user.domain'}; }
   if (!$stuname) { $stuname=$ENV{'user.name'}; }    if (!$stuname) { $stuname=$ENV{'user.name'}; }
     if ($domain eq 'public' && $stuname eq 'public') {
         $stuname=$ENV{'REMOTE_ADDR'};
     }
   my $path=$perlvar{'lonDaemons'}.'/tmp';    my $path=$perlvar{'lonDaemons'}.'/tmp';
   my %hash;    my %hash;
   if (tie(%hash,'GDBM_File',    if (tie(%hash,'GDBM_File',
Line 1686  sub tmpstore { Line 2037  sub tmpstore {
   }    }
   $namespace=~s/\//\_/g;    $namespace=~s/\//\_/g;
   $namespace=~s/\W//g;    $namespace=~s/\W//g;
 #FIXME needs to do something for /pub resources  
   if (!$domain) { $domain=$ENV{'user.domain'}; }    if (!$domain) { $domain=$ENV{'user.domain'}; }
   if (!$stuname) { $stuname=$ENV{'user.name'}; }    if (!$stuname) { $stuname=$ENV{'user.name'}; }
     if ($domain eq 'public' && $stuname eq 'public') {
         $stuname=$ENV{'REMOTE_ADDR'};
     }
   my $now=time;    my $now=time;
   my %hash;    my %hash;
   my $path=$perlvar{'lonDaemons'}.'/tmp';    my $path=$perlvar{'lonDaemons'}.'/tmp';
Line 1700  sub tmpstore { Line 2053  sub tmpstore {
     my $allkeys='';       my $allkeys=''; 
     foreach my $key (keys(%$storehash)) {      foreach my $key (keys(%$storehash)) {
       $allkeys.=$key.':';        $allkeys.=$key.':';
       $hash{"$version:$symb:$key"}=$$storehash{$key};        $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
     }      }
     $hash{"$version:$symb:timestamp"}=$now;      $hash{"$version:$symb:timestamp"}=$now;
     $allkeys.='timestamp';      $allkeys.='timestamp';
Line 1727  sub tmprestore { Line 2080  sub tmprestore {
   $symb=escape($symb);    $symb=escape($symb);
   
   if (!$namespace) { $namespace=$ENV{'request.state'}; }    if (!$namespace) { $namespace=$ENV{'request.state'}; }
   #FIXME needs to do something for /pub resources  
   if (!$domain) { $domain=$ENV{'user.domain'}; }    if (!$domain) { $domain=$ENV{'user.domain'}; }
   if (!$stuname) { $stuname=$ENV{'user.name'}; }    if (!$stuname) { $stuname=$ENV{'user.name'}; }
     if ($domain eq 'public' && $stuname eq 'public') {
         $stuname=$ENV{'REMOTE_ADDR'};
     }
   my %returnhash;    my %returnhash;
   $namespace=~s/\//\_/g;    $namespace=~s/\//\_/g;
   $namespace=~s/\W//g;    $namespace=~s/\W//g;
Line 1748  sub tmprestore { Line 2103  sub tmprestore {
       my $key;        my $key;
       $returnhash{"$scope:keys"}=$vkeys;        $returnhash{"$scope:keys"}=$vkeys;
       foreach $key (@keys) {        foreach $key (@keys) {
  $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};   $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
  $returnhash{"$key"}=$hash{"$scope:$symb:$key"};   $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
       }        }
     }      }
     if (!(untie(%hash))) {      if (!(untie(%hash))) {
Line 1784  sub store { Line 2139  sub store {
        }          } 
     }      }
     if (!$home) { $home=$ENV{'user.home'}; }      if (!$home) { $home=$ENV{'user.home'}; }
   
       $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
       $$storehash{'host'}=$perlvar{'lonHostID'};
   
     my $namevalue='';      my $namevalue='';
     foreach (keys %$storehash) {      foreach (keys %$storehash) {
         $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';          $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
     }      }
     $namevalue=~s/\&$//;      $namevalue=~s/\&$//;
     &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);      &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
Line 1817  sub cstore { Line 2176  sub cstore {
     }      }
     if (!$home) { $home=$ENV{'user.home'}; }      if (!$home) { $home=$ENV{'user.home'}; }
   
       $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
       $$storehash{'host'}=$perlvar{'lonHostID'};
   
     my $namevalue='';      my $namevalue='';
     foreach (keys %$storehash) {      foreach (keys %$storehash) {
         $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';          $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
     }      }
     $namevalue=~s/\&$//;      $namevalue=~s/\&$//;
     &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);      &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
Line 1853  sub restore { Line 2215  sub restore {
     my %returnhash=();      my %returnhash=();
     foreach (split(/\&/,$answer)) {      foreach (split(/\&/,$answer)) {
  my ($name,$value)=split(/\=/,$_);   my ($name,$value)=split(/\=/,$_);
         $returnhash{&unescape($name)}=&unescape($value);          $returnhash{&unescape($name)}=&thaw_unescape($value);
     }      }
     my $version;      my $version;
     for ($version=1;$version<=$returnhash{'version'};$version++) {      for ($version=1;$version<=$returnhash{'version'};$version++) {
Line 1899  sub coursedescription { Line 2261  sub coursedescription {
     return %returnhash;      return %returnhash;
 }  }
   
   # -------------------------------------------------See if a user is privileged
   
   sub privileged {
       my ($username,$domain)=@_;
       my $rolesdump=&reply("dump:$domain:$username:roles",
    &homeserver($username,$domain));
       if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
       my $now=time;
       if ($rolesdump ne '') {
           foreach (split(/&/,$rolesdump)) {
       if ($_!~/^rolesdef_/) {
    my ($area,$role)=split(/=/,$_);
    $area=~s/\_\w\w$//;
    my ($trole,$tend,$tstart)=split(/_/,$role);
    if (($trole eq 'dc') || ($trole eq 'su')) {
       my $active=1;
       if ($tend) {
    if ($tend<$now) { $active=0; }
       }
       if ($tstart) {
    if ($tstart>$now) { $active=0; }
       }
       if ($active) { return 1; }
    }
       }
    }
       }
       return 0;
   }
   
 # -------------------------------------------------------- Get user privileges  # -------------------------------------------------------- Get user privileges
   
 sub rolesinit {  sub rolesinit {
Line 1906  sub rolesinit { Line 2298  sub rolesinit {
     my $rolesdump=reply("dump:$domain:$username:roles",$authhost);      my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
     if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }      if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
     my %allroles=();      my %allroles=();
     my %thesepriv=();  
     my $now=time;      my $now=time;
     my $userroles="user.login.time=$now\n";      my $userroles="user.login.time=$now\n";
     my $thesestr;  
   
     if ($rolesdump ne '') {      if ($rolesdump ne '') {
         foreach (split(/&/,$rolesdump)) {          foreach (split(/&/,$rolesdump)) {
   if ($_!~/^rolesdef\&/) {    if ($_!~/^rolesdef_/) {
             my ($area,$role)=split(/=/,$_);              my ($area,$role)=split(/=/,$_);
             $area=~s/\_\w\w$//;      $area=~s/\_\w\w$//;
             my ($trole,$tend,$tstart)=split(/_/,$role);      
             $userroles.='user.role.'.$trole.'.'.$area.'='.              my ($trole,$tend,$tstart);
                         $tstart.'.'.$tend."\n";      if ($role=~/^cr/) { 
 # log the associated role with the area   ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
             &userrolelog($trole,$username,$domain,$area,$tstart,$tend);   ($tend,$tstart)=split('_',$trest);
             if ($tend!=0) {      } else {
         if ($tend<$now) {   ($trole,$tend,$tstart)=split(/_/,$role);
             $trole='';      }
                 }               $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
             }              if (($tend!=0) && ($tend<$now)) { $trole=''; }
             if ($tstart!=0) {              if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
                 if ($tstart>$now) {  
                    $trole='';          
                 }  
             }  
             if (($area ne '') && ($trole ne '')) {              if (($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);                      &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
     my $homsvr=homeserver($rauthor,$rdomain);  
     if ($hostname{$homsvr} ne '') {  
  my $roledef=  
     reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",  
   $homsvr);  
  if (($roledef ne 'con_lost') && ($roledef ne '')) {  
     my ($syspriv,$dompriv,$coursepriv)=  
  split(/\_/,unescape($roledef));  
     if (defined($syspriv)) {  
  $allroles{'cm./'}.=':'.$syspriv;  
  $allroles{$spec.'./'}.=':'.$syspriv;  
     }  
     if ($tdomain ne '') {  
  if (defined($dompriv)) {  
     $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;  
     $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;  
  }  
  if ($trest ne '') {  
     if (defined($coursepriv)) {  
  $allroles{'cm.'.$area}.=':'.$coursepriv;  
  $allroles{$spec.'.'.$area}.=':'.$coursepriv;  
     }  
  }  
     }  
  }  
     }  
  } else {   } else {
     if (defined($pr{$trole.':s'})) {                      &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
  $allroles{'cm./'}.=':'.$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'};  
     }  
  }  
     }  
  }   }
             }              }
           }             } 
         }          }
         my $adv=0;          my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
         my $author=0;  
         foreach (keys %allroles) {  
             %thesepriv=();  
             if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }  
             if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }  
             foreach (split(/:/,$allroles{$_})) {  
                 if ($_ ne '') {  
     my ($privilege,$restrictions)=split(/&/,$_);  
                     if ($restrictions eq '') {  
  $thesepriv{$privilege}='F';  
                     } else {  
                         if ($thesepriv{$privilege} ne 'F') {  
     $thesepriv{$privilege}.=$restrictions;  
                         }  
                     }  
                 }  
             }  
             $thesestr='';  
             foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }  
             $userroles.='user.priv.'.$_.'='.$thesestr."\n";  
         }  
         $userroles.='user.adv='.$adv."\n".          $userroles.='user.adv='.$adv."\n".
             'user.author='.$author."\n";              'user.author='.$author."\n";
         $ENV{'user.adv'}=$adv;          $ENV{'user.adv'}=$adv;
Line 2012  sub rolesinit { Line 2336  sub rolesinit {
     return $userroles;        return $userroles;  
 }  }
   
   sub set_arearole {
       my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
   # log the associated role with the area
       &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
       return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
   }
   
   sub custom_roleprivs {
       my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
       my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
       my $homsvr=homeserver($rauthor,$rdomain);
       if ($hostname{$homsvr} ne '') {
           my ($rdummy,$roledef)=
               &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
           if (($rdummy ne 'con_lost') && ($roledef ne '')) {
               my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
               if (defined($syspriv)) {
                   $$allroles{'cm./'}.=':'.$syspriv;
                   $$allroles{$spec.'./'}.=':'.$syspriv;
               }
               if ($tdomain ne '') {
                   if (defined($dompriv)) {
                       $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
                       $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
                   }
                   if (($trest ne '') && (defined($coursepriv))) {
                       $$allroles{'cm.'.$area}.=':'.$coursepriv;
                       $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
                   }
               }
           }
       }
   }
   
   
   sub standard_roleprivs {
       my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
       if (defined($pr{$trole.':s'})) {
           $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
           $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
       }
       if ($tdomain ne '') {
           if (defined($pr{$trole.':d'})) {
               $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
               $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
           }
           if (($trest ne '') && (defined($pr{$trole.':c'}))) {
               $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
               $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
           }
       }
   }
   
   sub set_userprivs {
       my ($userroles,$allroles) = @_; 
       my $author=0;
       my $adv=0;
       foreach (keys %{$allroles}) {
           my %thesepriv=();
           if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
           foreach (split(/:/,$$allroles{$_})) {
               if ($_ ne '') {
                   my ($privilege,$restrictions)=split(/&/,$_);
                   if ($restrictions eq '') {
                       $thesepriv{$privilege}='F';
                   } elsif ($thesepriv{$privilege} ne 'F') {
                       $thesepriv{$privilege}.=$restrictions;
                   }
                   if ($thesepriv{'adv'} eq 'F') { $adv=1; }
               }
           }
           my $thesestr='';
           foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
           $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
       }
       return ($author,$adv);
   }
   
 # --------------------------------------------------------------- get interface  # --------------------------------------------------------------- get interface
   
 sub get {  sub get {
Line 2033  sub get { Line 2435  sub get {
    my %returnhash=();     my %returnhash=();
    my $i=0;     my $i=0;
    foreach (@$storearr) {     foreach (@$storearr) {
       $returnhash{$_}=unescape($pairs[$i]);        $returnhash{$_}=&thaw_unescape($pairs[$i]);
       $i++;        $i++;
    }     }
    return %returnhash;     return %returnhash;
Line 2072  sub dump { Line 2474  sub dump {
    my %returnhash=();     my %returnhash=();
    foreach (@pairs) {     foreach (@pairs) {
       my ($key,$value)=split(/=/,$_);        my ($key,$value)=split(/=/,$_);
       $returnhash{unescape($key)}=unescape($value);        $returnhash{unescape($key)}=&thaw_unescape($value);
    }     }
    return %returnhash;     return %returnhash;
 }  }
   
   # -------------------------------------------------------------- keys interface
   
   sub getkeys {
      my ($namespace,$udomain,$uname)=@_;
      if (!$udomain) { $udomain=$ENV{'user.domain'}; }
      if (!$uname) { $uname=$ENV{'user.name'}; }
      my $uhome=&homeserver($uname,$udomain);
      my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
      my @keyarray=();
      foreach (split(/\&/,$rep)) {
         push (@keyarray,&unescape($_));
      }
      return @keyarray;
   }
   
 # --------------------------------------------------------------- currentdump  # --------------------------------------------------------------- currentdump
 sub currentdump {  sub currentdump {
    my ($courseid,$sdom,$sname)=@_;     my ($courseid,$sdom,$sname)=@_;
Line 2096  sub currentdump { Line 2513  sub currentdump {
        return if ($tmp[0] =~ /^(error:|no_such_host)/);         return if ($tmp[0] =~ /^(error:|no_such_host)/);
        my %hash = @tmp;         my %hash = @tmp;
        @tmp=();         @tmp=();
        # Code ripped from lond, essentially.  The only difference         %returnhash = %{&convert_dump_to_currentdump(\%hash)};
        # 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 ($key =~ /^v\./);  
            }  
        }  
    } else {     } else {
        my @pairs=split(/\&/,$rep);         my @pairs=split(/\&/,$rep);
        foreach (@pairs) {         foreach (@pairs) {
            my ($key,$value)=split(/=/,$_);             my ($key,$value)=split(/=/,$_);
            my ($symb,$param) = split(/:/,$key);             my ($symb,$param) = split(/:/,$key);
            $returnhash{&unescape($symb)}->{&unescape($param)} =              $returnhash{&unescape($symb)}->{&unescape($param)} = 
                                                           &unescape($value);                                                          &thaw_unescape($value);
        }         }
    }     }
    return %returnhash;     return %returnhash;
 }  }
   
   sub convert_dump_to_currentdump{
       my %hash = %{shift()};
       my %returnhash;
       # 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\./);
           }
       }
       return \%returnhash;
   }
   
   # --------------------------------------------------------------- inc interface
   
   sub inc {
       my ($namespace,$store,$udomain,$uname) = @_;
       if (!$udomain) { $udomain=$ENV{'user.domain'}; }
       if (!$uname) { $uname=$ENV{'user.name'}; }
       my $uhome=&homeserver($uname,$udomain);
       my $items='';
       if (! ref($store)) {
           # got a single value, so use that instead
           $items = &escape($store).'=&';
       } elsif (ref($store) eq 'SCALAR') {
           $items = &escape($$store).'=&';        
       } elsif (ref($store) eq 'ARRAY') {
           $items = join('=&',map {&escape($_);} @{$store});
       } elsif (ref($store) eq 'HASH') {
           while (my($key,$value) = each(%{$store})) {
               $items.= &escape($key).'='.&escape($value).'&';
           }
       }
       $items=~s/\&$//;
       return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
   }
   
 # --------------------------------------------------------------- put interface  # --------------------------------------------------------------- put interface
   
 sub put {  sub put {
Line 2138  sub put { Line 2586  sub put {
    my $uhome=&homeserver($uname,$udomain);     my $uhome=&homeserver($uname,$udomain);
    my $items='';     my $items='';
    foreach (keys %$storehash) {     foreach (keys %$storehash) {
        $items.=&escape($_).'='.&escape($$storehash{$_}).'&';         $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
      }
      $items=~s/\&$//;
      return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
   }
   
   # ---------------------------------------------------------- putstore interface
                                                                                        
   sub putstore {
      my ($namespace,$storehash,$udomain,$uname)=@_;
      if (!$udomain) { $udomain=$ENV{'user.domain'}; }
      if (!$uname) { $uname=$ENV{'user.name'}; }
      my $uhome=&homeserver($uname,$udomain);
      my $items='';
      my %allitems = ();
      foreach (keys %$storehash) {
          if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
              my $key = $1.':keys:'.$2;
              $allitems{$key} .= $3.':';
          }
          $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
      }
      foreach (keys %allitems) {
          $allitems{$_} =~ s/\:$//;
          $items.= $_.'='.$allitems{$_}.'&';
    }     }
    $items=~s/\&$//;     $items=~s/\&$//;
    return &reply("put:$udomain:$uname:$namespace:$items",$uhome);     return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
Line 2153  sub cput { Line 2625  sub cput {
    my $uhome=&homeserver($uname,$udomain);     my $uhome=&homeserver($uname,$udomain);
    my $items='';     my $items='';
    foreach (keys %$storehash) {     foreach (keys %$storehash) {
        $items.=escape($_).'='.escape($$storehash{$_}).'&';         $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
    }     }
    $items=~s/\&$//;     $items=~s/\&$//;
    return &critical("put:$udomain:$uname:$namespace:$items",$uhome);     return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
Line 2176  sub eget { Line 2648  sub eget {
    my %returnhash=();     my %returnhash=();
    my $i=0;     my $i=0;
    foreach (@$storearr) {     foreach (@$storearr) {
       $returnhash{$_}=unescape($pairs[$i]);        $returnhash{$_}=&thaw_unescape($pairs[$i]);
       $i++;        $i++;
    }     }
    return %returnhash;     return %returnhash;
Line 2209  sub customaccess { Line 2681  sub customaccess {
             $access=($effect eq 'allow');              $access=($effect eq 'allow');
             last;              last;
         }          }
    if ($realm eq '' && $role eq '') {
               $access=($effect eq 'allow');
    }
     }      }
     return $access;      return $access;
 }  }
Line 2216  sub customaccess { Line 2691  sub customaccess {
 # ------------------------------------------------- Check for a user privilege  # ------------------------------------------------- Check for a user privilege
   
 sub allowed {  sub allowed {
     my ($priv,$uri)=@_;      my ($priv,$uri,$symb)=@_;
       $uri=&deversion($uri);
     my $orguri=$uri;      my $orguri=$uri;
     $uri=&declutter($uri);      $uri=&declutter($uri);
       
       
       
       if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
 # Free bre access to adm and meta resources  # Free bre access to adm and meta resources
       if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|)) 
     if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {   || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
  return 'F';   return 'F';
     }      }
   
   # Free bre access to user's own portfolio contents
       my ($space,$domain,$name,$dir)=split('/',$uri);
       if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) && 
    ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
           return 'F';
       }
   
 # Free bre to public access  # Free bre to public access
   
     if ($priv eq 'bre') {      if ($priv eq 'bre') {
Line 2269  sub allowed { Line 2754  sub allowed {
   
 # Course  # Course
   
     if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {      if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
        $thisallowed.=$1;         $thisallowed.=$1;
     }      }
   
 # Domain  # Domain
   
     if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}      if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
        =~/$priv\&([^\:]*)/) {         =~/\Q$priv\E\&([^\:]*)/) {
        $thisallowed.=$1;         $thisallowed.=$1;
     }      }
   
Line 2286  sub allowed { Line 2771  sub allowed {
     $courseuri=~s/^([^\/])/\/$1/;      $courseuri=~s/^([^\/])/\/$1/;
   
     if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}      if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
        =~/$priv\&([^\:]*)/) {         =~/\Q$priv\E\&([^\:]*)/) {
        $thisallowed.=$1;         $thisallowed.=$1;
     }      }
   
 # URI is an uploaded document for this course  # URI is an uploaded document for this course
   
     if (($priv eq 'bre') &&       if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
         ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {   my $refuri=$ENV{'httpref.'.$orguri};
         return 'F';   if ($refuri) {
       if ($refuri =~ m|^/adm/|) {
    $thisallowed='F';
       }
    }
     }      }
   
 # Full access at system, domain or course-wide level? Exit.  # Full access at system, domain or course-wide level? Exit.
   
     if ($thisallowed=~/F/) {      if ($thisallowed=~/F/) {
Line 2304  sub allowed { Line 2794  sub allowed {
   
 # If this is generating or modifying users, exit with special codes  # If this is generating or modifying users, exit with special codes
   
     if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {      if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
  return $thisallowed;   return $thisallowed;
     }      }
 #  #
Line 2325  sub allowed { Line 2815  sub allowed {
        if ($match) {         if ($match) {
            $statecond=$cond;             $statecond=$cond;
            if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}             if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
                =~/$priv\&([^\:]*)/) {                 =~/\Q$priv\E\&([^\:]*)/) {
                $thisallowed.=$1;                 $thisallowed.=$1;
                $checkreferer=0;                 $checkreferer=0;
            }             }
Line 2353  sub allowed { Line 2843  sub allowed {
             if ($match) {              if ($match) {
               my $refstatecond=$cond;                my $refstatecond=$cond;
               if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}                if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
                   =~/$priv\&([^\:]*)/) {                    =~/\Q$priv\E\&([^\:]*)/) {
                   $thisallowed.=$1;                    $thisallowed.=$1;
                   $uri=$refuri;                    $uri=$refuri;
                   $statecond=$refstatecond;                    $statecond=$refstatecond;
Line 2406  sub allowed { Line 2896  sub allowed {
                if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {                 if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
    &coursedescription($courseid);     &coursedescription($courseid);
                }                 }
                if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)                 if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
                 || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {                  || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
    if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {     if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
                        &log($ENV{'user.domain'},$ENV{'user.name'},                         &log($ENV{'user.domain'},$ENV{'user.name'},
Line 2417  sub allowed { Line 2907  sub allowed {
        return '';         return '';
                    }                     }
                }                 }
                if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)                 if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
                 || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {                  || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
    if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {     if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
                        &log($ENV{'user.domain'},$ENV{'user.name'},                         &log($ENV{'user.domain'},$ENV{'user.name'},
Line 2451  sub allowed { Line 2941  sub allowed {
        my $rolecode=(split(/\./,$ENV{'request.role'}))[0];         my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
        my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};         my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
        if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}         if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
    =~/$rolecode/) {     =~/\Q$rolecode\E/) {
            &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},             &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
                 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.                  'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
                 $ENV{'request.course.id'});                  $ENV{'request.course.id'});
Line 2459  sub allowed { Line 2949  sub allowed {
        }         }
   
        if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}         if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
    =~/$unamedom/) {     =~/\Q$unamedom\E/) {
            &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},             &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
                 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.                  'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
                 $ENV{'request.course.id'});                  $ENV{'request.course.id'});
Line 2471  sub allowed { Line 2961  sub allowed {
   
    if ($thisallowed=~/R/) {     if ($thisallowed=~/R/) {
        my $rolecode=(split(/\./,$ENV{'request.role'}))[0];         my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
        if (&metadata($uri,'roledeny')=~/$rolecode/) {         if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
   &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},    &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
                     'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);                      'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
           return '';            return '';
Line 2482  sub allowed { Line 2972  sub allowed {
   
    if ($thisallowed=~/X/) {     if ($thisallowed=~/X/) {
       if ($ENV{'acc.randomout'}) {        if ($ENV{'acc.randomout'}) {
          my $symb=&symbread($uri,1);   if (!$symb) { $symb=&symbread($uri,1); }
          if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {            if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) { 
             return '';               return ''; 
          }           }
       }        }
Line 2501  sub allowed { Line 2991  sub allowed {
   
 sub is_on_map {  sub is_on_map {
     my $uri=&declutter(shift);      my $uri=&declutter(shift);
       $uri=~s/\.\d+\.(\w+)$/\.$1/;
     my @uriparts=split(/\//,$uri);      my @uriparts=split(/\//,$uri);
     my $filename=$uriparts[$#uriparts];      my $filename=$uriparts[$#uriparts];
     my $pathname=$uri;      my $pathname=$uri;
Line 2516  sub is_on_map { Line 3007  sub is_on_map {
     }      }
 }  }
   
   # --------------------------------------------------------- Get symb from alias
   
   sub get_symb_from_alias {
       my $symb=shift;
       my ($map,$resid,$url)=&decode_symb($symb);
   # Already is a symb
       if ($url) { return $symb; }
   # Must be an alias
       my $aliassymb='';
       my %bighash;
       if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
                               &GDBM_READER(),0640)) {
           my $rid=$bighash{'mapalias_'.$symb};
    if ($rid) {
       my ($mapid,$resid)=split(/\./,$rid);
       $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
       $resid,$bighash{'src_'.$rid});
    }
           untie %bighash;
       }
       return $aliassymb;
   }
   
 # ----------------------------------------------------------------- Define Role  # ----------------------------------------------------------------- Define Role
   
 sub definerole {  sub definerole {
   if (allowed('mcr','/')) {    if (allowed('mcr','/')) {
     my ($rolename,$sysrole,$domrole,$courole)=@_;      my ($rolename,$sysrole,$domrole,$courole)=@_;
     foreach (split('/',$sysrole)) {      foreach (split(':',$sysrole)) {
  my ($crole,$cqual)=split(/\&/,$_);   my ($crole,$cqual)=split(/\&/,$_);
         if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }          if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
         if ($pr{'cr:s'}=~/$crole\&/) {          if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
     if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {       if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) { 
                return "refused:s:$crole&$cqual";                  return "refused:s:$crole&$cqual"; 
             }              }
         }          }
     }      }
     foreach (split('/',$domrole)) {      foreach (split(':',$domrole)) {
  my ($crole,$cqual)=split(/\&/,$_);   my ($crole,$cqual)=split(/\&/,$_);
         if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }          if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
         if ($pr{'cr:d'}=~/$crole\&/) {          if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
     if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {       if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) { 
                return "refused:d:$crole&$cqual";                  return "refused:d:$crole&$cqual"; 
             }              }
         }          }
     }      }
     foreach (split('/',$courole)) {      foreach (split(':',$courole)) {
  my ($crole,$cqual)=split(/\&/,$_);   my ($crole,$cqual)=split(/\&/,$_);
         if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }          if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
         if ($pr{'cr:c'}=~/$crole\&/) {          if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
     if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {       if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) { 
                return "refused:c:$crole&$cqual";                  return "refused:c:$crole&$cqual"; 
             }              }
         }          }
Line 2590  sub log_query { Line 3104  sub log_query {
     my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));      my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
     my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,      my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
                        $uhome);                         $uhome);
     unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }      unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
     return get_query_reply($queryid);      return get_query_reply($queryid);
 }  }
   
   # ------- Request retrieval of institutional classlists for course(s)
   
   sub fetch_enrollment_query {
       my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
       my $homeserver;
       my $maxtries = 1;
       if ($context eq 'automated') {
           $homeserver = $perlvar{'lonHostID'};
           $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
       } else {
           $homeserver = &homeserver($cnum,$dom);
       }
       my $host=$hostname{$homeserver};
       my $cmd = '';
       foreach (keys %{$affiliatesref}) {
           $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
       }
       $cmd =~ s/%%$//;
       $cmd = &escape($cmd);
       my $query = 'fetchenrollment';
       my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
       unless ($queryid=~/^\Q$host\E\_/) { 
           &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum); 
           return 'error: '.$queryid;
       }
       my $reply = &get_query_reply($queryid);
       my $tries = 1;
       while (($reply=~/^timeout/) && ($tries < $maxtries)) {
           $reply = &get_query_reply($queryid);
           $tries ++;
       }
       if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
           &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
       } else {
           my @responses = split/:/,$reply;
           if ($homeserver eq $perlvar{'lonHostID'}) {
               foreach (@responses) {
                   my ($key,$value) = split/=/,$_;
                   $$replyref{$key} = $value;
               }
           } else {
               my $pathname = $perlvar{'lonDaemons'}.'/tmp';
               foreach (@responses) {
                   my ($key,$value) = split/=/,$_;
                   $$replyref{$key} = $value;
                   if ($value > 0) {
                       foreach (@{$$affiliatesref{$key}}) {
                           my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
                           my $destname = $pathname.'/'.$filename;
                           my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
                           if ($xml_classlist =~ /^error/) {
                               &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
                           } else {
                               if ( open(FILE,">$destname") ) {
                                   print FILE &unescape($xml_classlist);
                                   close(FILE);
                               } else {
                                   &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
                               }
                           }
                       }
                   }
               }
           }
           return 'ok';
       }
       return 'error';
   }
   
 sub get_query_reply {  sub get_query_reply {
     my $queryid=shift;      my $queryid=shift;
     my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;      my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
Line 2601  sub get_query_reply { Line 3184  sub get_query_reply {
     for (1..100) {      for (1..100) {
  sleep 2;   sleep 2;
         if (-e $replyfile.'.end') {          if (-e $replyfile.'.end') {
     if (my $fh=Apache::File->new($replyfile)) {      if (open(my $fh,$replyfile)) {
                $reply.=<$fh>;                 $reply.=<$fh>;
                $fh->close;                 close($fh);
    } else { return 'error: reply_file_error'; }     } else { return 'error: reply_file_error'; }
            return &unescape($reply);             return &unescape($reply);
  }   }
Line 2638  sub userlog_query { Line 3221  sub userlog_query {
     return &log_query($uname,$udom,'userlog',%filters);      return &log_query($uname,$udom,'userlog',%filters);
 }  }
   
   #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course 
   
   sub auto_run {
       my ($cnum,$cdom) = @_;
       my $homeserver = &homeserver($cnum,$cdom);
       my $response = &reply('autorun:'.$cdom,$homeserver);
       return $response;
   }
                                                                                      
   sub auto_get_sections {
       my ($cnum,$cdom,$inst_coursecode) = @_;
       my $homeserver = &homeserver($cnum,$cdom);
       my @secs = ();
       my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
       unless ($response eq 'refused') {
           @secs = split/:/,$response;
       }
       return @secs;
   }
                                                                                      
   sub auto_new_course {
       my ($cnum,$cdom,$inst_course_id,$owner) = @_;
       my $homeserver = &homeserver($cnum,$cdom);
       my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
       return $response;
   }
                                                                                      
   sub auto_validate_courseID {
       my ($cnum,$cdom,$inst_course_id) = @_;
       my $homeserver = &homeserver($cnum,$cdom);
       my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
       return $response;
   }
                                                                                      
   sub auto_create_password {
       my ($cnum,$cdom,$authparam) = @_;
       my $homeserver = &homeserver($cnum,$cdom); 
       my $create_passwd = 0;
       my $authchk = '';
       my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
       if ($response eq 'refused') {
           $authchk = 'refused';
       } else {
           ($authparam,$create_passwd,$authchk) = split/:/,$response;
       }
       return ($authparam,$create_passwd,$authchk);
   }
   
   sub auto_instcode_format {
       my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
       my $courses = '';
       my $homeserver;
       if ($caller eq 'global') {
           foreach my $tryserver (keys %libserv) {
               if ($hostdom{$tryserver} eq $codedom) {
                   $homeserver = $tryserver;
                   last;
               }
           }
           if (($ENV{'user.name'}) && ($ENV{'user.domain'} eq $codedom)) {
               $homeserver = &homeserver($ENV{'user.name'},$codedom);
           }
       } else {
           $homeserver = &homeserver($caller,$codedom);
       }
       foreach (keys %{$instcodes}) {
           $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
       }
       chop($courses);
       my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
       unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
           my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
           %{$codes} = &str2hash($codes_str);
           @{$codetitles} = &str2array($codetitles_str);
           %{$cat_titles} = &str2hash($cat_titles_str);
           %{$cat_order} = &str2hash($cat_order_str);
           return 'ok';
       }
       return $response;
   }
   
 # ------------------------------------------------------------------ Plain Text  # ------------------------------------------------------------------ Plain Text
   
 sub plaintext {  sub plaintext {
     my $short=shift;      my $short=shift;
     return $prp{$short};      return &mt($prp{$short});
 }  }
   
 # ----------------------------------------------------------------- Assign Role  # ----------------------------------------------------------------- Assign Role
Line 2651  sub assignrole { Line 3315  sub assignrole {
     my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;      my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
     my $mrole;      my $mrole;
     if ($role =~ /^cr\//) {      if ($role =~ /^cr\//) {
  unless (&allowed('ccr',$url)) {          my $cwosec=$url;
           $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
    unless (&allowed('ccr',$cwosec)) {
            &logthis('Refused custom assignrole: '.             &logthis('Refused custom assignrole: '.
              $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.               $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
     $ENV{'user.name'}.' at '.$ENV{'user.domain'});      $ENV{'user.name'}.' at '.$ENV{'user.domain'});
Line 2732  sub modifyuser { Line 3398  sub modifyuser {
     my ($udom,    $uname, $uid,      my ($udom,    $uname, $uid,
         $umode,   $upass, $first,          $umode,   $upass, $first,
         $middle,  $last,  $gene,          $middle,  $last,  $gene,
         $forceid, $desiredhome)=@_;          $forceid, $desiredhome, $email)=@_;
     $udom=~s/\W//g;      $udom=~s/\W//g;
     $uname=~s/\W//g;      $uname=~s/\W//g;
     &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.      &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
Line 2744  sub modifyuser { Line 3410  sub modifyuser {
              ' in domain '.$ENV{'request.role.domain'});               ' in domain '.$ENV{'request.role.domain'});
     my $uhome=&homeserver($uname,$udom,'true');      my $uhome=&homeserver($uname,$udom,'true');
 # ----------------------------------------------------------------- Create User  # ----------------------------------------------------------------- Create User
     if (($uhome eq 'no_host') && ($umode) && ($upass)) {      if (($uhome eq 'no_host') && 
    (($umode && $upass) || ($umode eq 'localauth'))) {
         my $unhome='';          my $unhome='';
         if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {           if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) { 
             $unhome = $desiredhome;              $unhome = $desiredhome;
Line 2801  sub modifyuser { Line 3468  sub modifyuser {
     } else {      } else {
         %names = @tmp;          %names = @tmp;
     }      }
     if (defined($first))  { $names{'firstname'}  = $first; }  #
   # Make sure to not trash student environment if instructor does not bother
   # to supply name and email information
   #
       if ($first)  { $names{'firstname'}  = $first; }
     if (defined($middle)) { $names{'middlename'} = $middle; }      if (defined($middle)) { $names{'middlename'} = $middle; }
     if (defined($last))   { $names{'lastname'}   = $last; }      if ($last)   { $names{'lastname'}   = $last; }
     if (defined($gene))   { $names{'generation'} = $gene; }      if (defined($gene))   { $names{'generation'} = $gene; }
       if ($email) {
          $email=~s/[^\w\@\.\-\,]//gs;
          if ($email=~/\@/) { $names{'notification'} = $email;
      $names{'critnotification'} = $email;
      $names{'permanentemail'} = $email; }
       }
     my $reply = &put('environment', \%names, $udom,$uname);      my $reply = &put('environment', \%names, $udom,$uname);
     if ($reply ne 'ok') { return 'error: '.$reply; }      if ($reply ne 'ok') { return 'error: '.$reply; }
     &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.      &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
Line 2818  sub modifyuser { Line 3495  sub modifyuser {
   
 sub modifystudent {  sub modifystudent {
     my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,      my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
         $end,$start,$forceid,$desiredhome)=@_;          $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
     my $cid='';      if (!$cid) {
     unless ($cid=$ENV{'request.course.id'}) {   unless ($cid=$ENV{'request.course.id'}) {
  return 'not_in_class';      return 'not_in_class';
    }
     }      }
 # --------------------------------------------------------------- Make the user  # --------------------------------------------------------------- Make the user
     my $reply=&modifyuser      my $reply=&modifyuser
  ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,   ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
          $desiredhome);           $desiredhome,$email);
     unless ($reply eq 'ok') { return $reply; }      unless ($reply eq 'ok') { return $reply; }
     # This will cause &modify_student_enrollment to get the uid from the      # This will cause &modify_student_enrollment to get the uid from the
     # students environment      # students environment
     $uid = undef if (!$forceid);      $uid = undef if (!$forceid);
     $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,      $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
                                         $last,$gene,$usec,$end,$start);   $gene,$usec,$end,$start,$type,$locktype,$cid);
     return $reply;      return $reply;
 }  }
   
 sub modify_student_enrollment {  sub modify_student_enrollment {
     my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;      my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
     # Get the course id from the environment      my ($cdom,$cnum,$chome);
     my $cid='';      if (!$cid) {
     unless ($cid=$ENV{'request.course.id'}) {   unless ($cid=$ENV{'request.course.id'}) {
  return 'not_in_class';      return 'not_in_class';
    }
    $cdom=$ENV{'course.'.$cid.'.domain'};
    $cnum=$ENV{'course.'.$cid.'.num'};
       } else {
    ($cdom,$cnum)=split(/_/,$cid);
       }
       $chome=$ENV{'course.'.$cid.'.home'};
       if (!$chome) {
    $chome=&homeserver($cnum,$cdom);
     }      }
       if (!$chome) { return 'unknown_course'; }
     # Make sure the user exists      # Make sure the user exists
     my $uhome=&homeserver($uname,$udom);      my $uhome=&homeserver($uname,$udom);
     if (($uhome eq '') || ($uhome eq 'no_host')) {       if (($uhome eq '') || ($uhome eq 'no_host')) { 
  return 'error: no such user';   return 'error: no such user';
     }      }
     #  
     # Get student data if we were not given enough information      # Get student data if we were not given enough information
     if (!defined($first)  || $first  eq '' ||       if (!defined($first)  || $first  eq '' || 
         !defined($last)   || $last   eq '' ||           !defined($last)   || $last   eq '' || 
Line 2861  sub modify_student_enrollment { Line 3548  sub modify_student_enrollment {
                        ['firstname','middlename','lastname', 'generation','id']                         ['firstname','middlename','lastname', 'generation','id']
                        ,$udom,$uname);                         ,$udom,$uname);
   
         foreach (keys(%tmp)) {          #foreach (keys(%tmp)) {
             &logthis("key $_ = ".$tmp{$_});          #    &logthis("key $_ = ".$tmp{$_});
         }          #}
         $first  = $tmp{'firstname'}  if (!defined($first)  || $first  eq '');          $first  = $tmp{'firstname'}  if (!defined($first)  || $first  eq '');
         $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');          $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
         $last   = $tmp{'lastname'}   if (!defined($last)   || $last eq '');          $last   = $tmp{'lastname'}   if (!defined($last)   || $last eq '');
         $gene   = $tmp{'generation'} if (!defined($gene)   || $gene eq '');          $gene   = $tmp{'generation'} if (!defined($gene)   || $gene eq '');
         $uid    = $tmp{'id'}         if (!defined($uid)    || $uid  eq '');          $uid    = $tmp{'id'}         if (!defined($uid)    || $uid  eq '');
     }      }
     my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,      my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
                                                            $first,$middle);      my $reply=cput('classlist',
     my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.     {"$uname:$udom" => 
               $ENV{'course.'.$cid.'.num'}.':classlist:'.   join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
                       &escape($uname.':'.$udom).'='.     $cdom,$cnum);
                       &escape(join(':',$end,$start,$uid,$usec,$fullname)),  
               $ENV{'course.'.$cid.'.home'});  
     unless (($reply eq 'ok') || ($reply eq 'delayed')) {      unless (($reply eq 'ok') || ($reply eq 'delayed')) {
  return 'error: '.$reply;   return 'error: '.$reply;
     }      }
Line 2889  sub modify_student_enrollment { Line 3574  sub modify_student_enrollment {
     return &assignrole($udom,$uname,$uurl,'st',$end,$start);      return &assignrole($udom,$uname,$uurl,'st',$end,$start);
 }  }
   
   sub format_name {
       my ($firstname,$middlename,$lastname,$generation,$first)=@_;
       my $name;
       if ($first ne 'lastname') {
    $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
       } else {
    if ($lastname=~/\S/) {
       $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
       $name=~s/\s+,/,/;
    } else {
       $name.= $firstname.' '.$middlename.' '.$generation;
    }
       }
       $name=~s/^\s+//;
       $name=~s/\s+$//;
       $name=~s/\s+/ /g;
       return $name;
   }
   
 # ------------------------------------------------- Write to course preferences  # ------------------------------------------------- Write to course preferences
   
 sub writecoursepref {  sub writecoursepref {
Line 2911  sub writecoursepref { Line 3615  sub writecoursepref {
 # ---------------------------------------------------------- Make/modify course  # ---------------------------------------------------------- Make/modify course
   
 sub createcourse {  sub createcourse {
     my ($udom,$description,$url,$course_server,$nonstandard)=@_;      my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
     $url=&declutter($url);      $url=&declutter($url);
     my $cid='';      my $cid='';
     unless (&allowed('ccc',$udom)) {      unless (&allowed('ccc',$udom)) {
Line 2944  sub createcourse { Line 3648  sub createcourse {
  return 'error: no such course';   return 'error: no such course';
     }      }
 # ----------------------------------------------------------------- Course made  # ----------------------------------------------------------------- Course made
 # log existance  # log existence
     &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),      &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
                  $uhome);                   ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
     &flushcourselogs();      &flushcourselogs();
 # set toplevel url  # set toplevel url
     my $topurl=$url;      my $topurl=$url;
Line 2999  sub revokecustomrole { Line 3703  sub revokecustomrole {
            $deleteflag);             $deleteflag);
 }  }
   
   # ------------------------------------------------------------ Disk usage
   sub diskusage {
       my ($udom,$uname,$directoryRoot)=@_;
       $directoryRoot =~ s/\/$//;
       my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
       return $listing;
   }
   
   sub is_locked {
       my ($file_name, $domain, $user) = @_;
       my @check;
       my $is_locked;
       push @check, $file_name;
       my %locked = &Apache::lonnet::get('file_permissions',\@check,
                                           $ENV{'user.domain'},$ENV{'user.name'});
       if (ref($locked{$file_name}) eq 'ARRAY') {
           $is_locked = 'true';
       } else {
           $is_locked = 'false';
       }
   }
   
   # ------------------------------------------------------------- Mark as Read Only
   
   sub mark_as_readonly {
       my ($domain,$user,$files,$what) = @_;
       my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
       foreach my $file (@{$files}) {
           push(@{$current_permissions{$file}},$what);
       }
       &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
       return;
   }
   
   # ------------------------------------------------------------Save Selected Files
   
   sub save_selected_files {
       my ($user, $path, @files) = @_;
       my $filename = $user."savedfiles";
       my @other_files = &files_not_in_path($user, $path);
       open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
       foreach my $file (@files) {
           print (OUT $ENV{'form.currentpath'}.$file."\n");
       }
       foreach my $file (@other_files) {
           print (OUT $file."\n");
       }
       close (OUT);
       return 'ok';
   }
   
   sub clear_selected_files {
       my ($user) = @_;
       my $filename = $user."savedfiles";
       open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
       print (OUT undef);
       close (OUT);
       return ("ok");    
   }
   
   sub files_in_path {
       my ($user, $path) = @_;
       my $filename = $user."savedfiles";
       my %return_files;
       open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
       while (my $line_in = <IN>) {
           chomp ($line_in);
           my @paths_and_file = split (m!/!, $line_in);
           my $file_part = pop (@paths_and_file);
           my $path_part = join ('/', @paths_and_file);
           $path_part.='/';
           my $path_and_file = $path_part.$file_part;
           if ($path_part eq $path) {
               $return_files{$file_part}= 'selected';
           }
       }
       close (IN);
       return (\%return_files);
   }
   
   # called in portfolio select mode, to show files selected NOT in current directory
   sub files_not_in_path {
       my ($user, $path) = @_;
       my $filename = $user."savedfiles";
       my @return_files;
       my $path_part;
       open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
       while (<IN>) {
           #ok, I know it's clunky, but I want it to work
           my @paths_and_file = split m!/!, $_;
           my $file_part = pop (@paths_and_file);
           chomp ($file_part);
           my $path_part = join ('/', @paths_and_file);
           $path_part .= '/';
           my $path_and_file = $path_part.$file_part;
           if ($path_part ne $path) {
               push (@return_files, ($path_and_file));
           }
       }
       close (OUT);
       return (@return_files);
   }
   
   #--------------------------------------------------------------Get Marked as Read Only
   
   sub get_marked_as_readonly {
       my ($domain,$user,$what) = @_;
       my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
       my @readonly_files;
       while (my ($file_name,$value) = each(%current_permissions)) {
           if (ref($value) eq "ARRAY"){
               foreach my $stored_what (@{$value}) {
                   if ($stored_what eq $what) {
                       push(@readonly_files, $file_name);
                   } elsif (!defined($what)) {
                       push(@readonly_files, $file_name);
                   }
               }
           } 
       }
       return @readonly_files;
   }
   #-----------------------------------------------------------Get Marked as Read Only Hash
   
   sub get_marked_as_readonly_hash {
       my ($domain,$user,$what) = @_;
       my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
       my %readonly_files;
       while (my ($file_name,$value) = each(%current_permissions)) {
           if (ref($value) eq "ARRAY"){
               foreach my $stored_what (@{$value}) {
                   if ($stored_what eq $what) {
                       $readonly_files{$file_name} = 'locked';
                   } elsif (!defined($what)) {
                       $readonly_files{$file_name} = 'locked';
                   }
               }
           } 
       }
       return %readonly_files;
   }
   # ------------------------------------------------------------ Unmark as Read Only
   
   sub unmark_as_readonly {
       # unmarks all files locked by $what 
       # for portfolio submissions, $what contains $crsid and $symb
       my ($domain,$user,$what) = @_;
       my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
       my @readonly_files = &Apache::lonnet::get_marked_as_readonly($domain,$user,$what);
       foreach my $file(@readonly_files){
           my $current_locks = $current_permissions{$file};
           my @new_locks;
           my @del_keys;
           if (ref($current_locks) eq "ARRAY"){
               foreach my $locker (@{$current_locks}) {
                   unless ($locker eq $what) {
                       push(@new_locks, $what);
                   }
               }
               if (@new_locks > 0) {
                   $current_permissions{$file} = \@new_locks;
               } else {
                   push(@del_keys, $file);
                   &Apache::lonnet::del('file_permissions',\@del_keys, $domain, $user);
                   delete $current_permissions{$file};
               }
           }
       }
       &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
       return;
   }
   
 # ------------------------------------------------------------ Directory lister  # ------------------------------------------------------------ Directory lister
   
 sub dirlist {  sub dirlist {
Line 3023  sub dirlist { Line 3899  sub dirlist {
   
     if($udom) {      if($udom) {
         if($uname) {          if($uname) {
             my $listing=reply('ls:'.$dirRoot.'/'.$uri,              my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
                               homeserver($uname,$udom));                                homeserver($uname,$udom));
             return split(/:/,$listing);              my @listing_results;
               if ($listing eq 'unknown_cmd') {
                   $listing=reply('ls:'.$dirRoot.'/'.$uri,
                                  homeserver($uname,$udom));
                   @listing_results = split(/:/,$listing);
               } else {
                   @listing_results = map { &unescape($_); } split(/:/,$listing);
               }
               return @listing_results;
         } elsif(!defined($alternateDirectoryRoot)) {          } elsif(!defined($alternateDirectoryRoot)) {
             my $tryserver;              my $tryserver;
             my %allusers=();              my %allusers=();
             foreach $tryserver (keys %libserv) {              foreach $tryserver (keys %libserv) {
                 if($hostdom{$tryserver} eq $udom) {                  if($hostdom{$tryserver} eq $udom) {
                     my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.                      my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
                                       $udom, $tryserver);                                        $udom, $tryserver);
                     if (($listing ne 'no_such_dir') && ($listing ne 'empty')                      my @listing_results;
                         && ($listing ne 'con_lost')) {                      if ($listing eq 'unknown_cmd') {
                         foreach (split(/:/,$listing)) {                          $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
                                          $udom, $tryserver);
                           @listing_results = split(/:/,$listing);
                       } else {
                           @listing_results =
                               map { &unescape($_); } split(/:/,$listing);
                       }
                       if ($listing_results[0] ne 'no_such_dir' && 
                           $listing_results[0] ne 'empty'       &&
                           $listing_results[0] ne 'con_lost') {
                           foreach (@listing_results) {
                             my ($entry,@stat)=split(/&/,$_);                              my ($entry,@stat)=split(/&/,$_);
                             $allusers{$entry}=1;                              $allusers{$entry}=1;
                         }                          }
Line 3061  sub dirlist { Line 3955  sub dirlist {
         }          }
         my $alldomstr='';          my $alldomstr='';
         foreach (sort keys %alldom) {          foreach (sort keys %alldom) {
             $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';              $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
         }          }
         $alldomstr=~s/:$//;          $alldomstr=~s/:$//;
         return split(/:/,$alldomstr);                 return split(/:/,$alldomstr);       
Line 3077  sub dirlist { Line 3971  sub dirlist {
 # when it was last modified.  It will also return an error of -1  # when it was last modified.  It will also return an error of -1
 # if an error occurs  # if an error occurs
   
   ##
   ## FIXME: This subroutine assumes its caller knows something about the
   ## directory structure of the home server for the student ($root).
   ## Not a good assumption to make.  Since this is for looking up files
   ## in user directories, the full path should be constructed by lond, not
   ## whatever machine we request data from.
   ##
 sub GetFileTimestamp {  sub GetFileTimestamp {
     my ($studentDomain,$studentName,$filename,$root)=@_;      my ($studentDomain,$studentName,$filename,$root)=@_;
     $studentDomain=~s/\W//g;      $studentDomain=~s/\W//g;
Line 3100  sub GetFileTimestamp { Line 4001  sub GetFileTimestamp {
   
 sub directcondval {  sub directcondval {
     my $number=shift;      my $number=shift;
       if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
    &Apache::lonuserstate::evalstate();
       }
     if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {      if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
        return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);         return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
     } else {      } else {
Line 3153  sub condval { Line 4057  sub condval {
 sub devalidatecourseresdata {  sub devalidatecourseresdata {
     my ($coursenum,$coursedomain)=@_;      my ($coursenum,$coursedomain)=@_;
     my $hashid=$coursenum.':'.$coursedomain;      my $hashid=$coursenum.':'.$coursedomain;
     delete $courseresdatacache{$hashid.'.time'};      &devalidate_cache_new('courseres',$hashid);
 }  }
   
 # --------------------------------------------------- Course Resourcedata Query  # --------------------------------------------------- Course Resourcedata Query
Line 3162  sub courseresdata { Line 4066  sub courseresdata {
     my ($coursenum,$coursedomain,@which)=@_;      my ($coursenum,$coursedomain,@which)=@_;
     my $coursehom=&homeserver($coursenum,$coursedomain);      my $coursehom=&homeserver($coursenum,$coursedomain);
     my $hashid=$coursenum.':'.$coursedomain;      my $hashid=$coursenum.':'.$coursedomain;
     my $dodump=0;      my ($result,$cached)=&is_cached_new('courseres',$hashid);
     if (!defined($courseresdatacache{$hashid.'.time'})) {      unless (defined($cached)) {
  $dodump=1;  
     } else {  
  if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }  
     }  
     if ($dodump) {  
  my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);   my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
    $result=\%dumpreply;
  my ($tmp) = keys(%dumpreply);   my ($tmp) = keys(%dumpreply);
  if ($tmp !~ /^(con_lost|error|no_such_host)/i) {   if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
     $courseresdatacache{$hashid.'.time'}=time;      &do_cache_new('courseres',$hashid,$result,600);
     $courseresdatacache{$hashid}=\%dumpreply;  
  } elsif ($tmp =~ /^(con_lost|no_such_host)/) {   } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
     return $tmp;      return $tmp;
    } elsif ($tmp =~ /^(error)/) {
       $result=undef;
       &do_cache_new('courseres',$hashid,$result,600);
  }   }
     }      }
     foreach my $item (@which) {      foreach my $item (@which) {
  if (defined($courseresdatacache{$hashid}->{$item})) {   if (defined($result->{$item})) {
     return $courseresdatacache{$hashid}->{$item};      return $result->{$item};
  }   }
     }      }
     return undef;      return undef;
Line 3197  sub clear_EXT_cache_status { Line 4099  sub clear_EXT_cache_status {
 sub EXT_cache_status {  sub EXT_cache_status {
     my ($target_domain,$target_user) = @_;      my ($target_domain,$target_user) = @_;
     my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;      my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
     if (exists($ENV{$cachename}) && ($ENV{$cachename}+1800) > time) {      if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
         # We know already the user has no data          # We know already the user has no data
         return 1;          return 1;
     } else {      } else {
Line 3213  sub EXT_cache_set { Line 4115  sub EXT_cache_set {
   
 # --------------------------------------------------------- Value of a Variable  # --------------------------------------------------------- Value of a Variable
 sub EXT {  sub EXT {
     my ($varname,$symbparm,$udom,$uname,$usection)=@_;      my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
   
     unless ($varname) { return ''; }      unless ($varname) { return ''; }
     #get real user name/domain, courseid and symb      #get real user name/domain, courseid and symb
     my $courseid;      my $courseid;
     my $publicuser;      my $publicuser;
       if ($symbparm) {
    $symbparm=&get_symb_from_alias($symbparm);
       }
     if (!($uname && $udom)) {      if (!($uname && $udom)) {
       (my $cursymb,$courseid,$udom,$uname,$publicuser)=        (my $cursymb,$courseid,$udom,$uname,$publicuser)=
   &Apache::lonxml::whichuser($symbparm);    &Apache::lonxml::whichuser($symbparm);
Line 3304  sub EXT { Line 4209  sub EXT {
    } elsif ($realm eq 'request') {     } elsif ($realm eq 'request') {
 # ------------------------------------------------------------- request.browser  # ------------------------------------------------------------- request.browser
         if ($space eq 'browser') {          if ($space eq 'browser') {
     return $ENV{'browser.'.$qualifier};      if ($qualifier eq 'textremote') {
    if (&mt('textual_remote_display') eq 'on') {
       return 1;
    } else {
       return 0;
    }
       } else {
    return $ENV{'browser.'.$qualifier};
       }
 # ------------------------------------------------------------ request.filename  # ------------------------------------------------------------ request.filename
         } else {          } else {
             return $ENV{'request.'.$spacequalifierrest};              return $ENV{'request.'.$spacequalifierrest};
Line 3314  sub EXT { Line 4227  sub EXT {
         return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};          return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
     } elsif ($realm eq 'resource') {      } elsif ($realm eq 'resource') {
   
    my $section;
  if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {   if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
       if (!$symbparm) { $symbparm=&symbread(); }
    }
    my ($courselevelm,$courselevel);
    if ($symbparm && defined($courseid) && 
       $courseid eq $ENV{'request.course.id'}) {
   
     #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;      #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
   
 # ----------------------------------------------------- Cascading lookup scheme  # ----------------------------------------------------- Cascading lookup scheme
     if (!$symbparm) { $symbparm=&symbread(); }  
     my $symbp=$symbparm;      my $symbp=$symbparm;
     my $mapp=(split(/\_\_\_/,$symbp))[0];      my $mapp=(&decode_symb($symbp))[0];
   
     my $symbparm=$symbp.'.'.$spacequalifierrest;      my $symbparm=$symbp.'.'.$spacequalifierrest;
     my $mapparm=$mapp.'___(all).'.$spacequalifierrest;      my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
   
     my $section;  
     if (($ENV{'user.name'} eq $uname) &&      if (($ENV{'user.name'} eq $uname) &&
  ($ENV{'user.domain'} eq $udom)) {   ($ENV{'user.domain'} eq $udom)) {
  $section=$ENV{'request.course.sec'};   $section=$ENV{'request.course.sec'};
     } else {      } else {
                 if (! defined($usection)) {   if (! defined($usection)) {
                     $section=&usection($udom,$uname,$courseid);      $section=&getsection($udom,$uname,$courseid);
                 } else {   } else {
                     $section = $usection;      $section = $usection;
                 }   }
     }      }
   
     my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;      my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
     my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;      my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
     my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;      my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
   
     my $courselevel=$courseid.'.'.$spacequalifierrest;      $courselevel=$courseid.'.'.$spacequalifierrest;
     my $courselevelr=$courseid.'.'.$symbparm;      my $courselevelr=$courseid.'.'.$symbparm;
     my $courselevelm=$courseid.'.'.$mapparm;      $courselevelm=$courseid.'.'.$mapparm;
   
 # ----------------------------------------------------------- first, check user  # ----------------------------------------------------------- first, check user
     #most student don\'t have any data set, check if there is some data      #most student don\'t have any data set, check if there is some data
             #every thirty minutes  
     if (! &EXT_cache_status($udom,$uname)) {      if (! &EXT_cache_status($udom,$uname)) {
  my %resourcedata=&get('resourcedata',   my $hashid="$udom:$uname";
       [$courselevelr,$courselevelm,$courselevel],   my ($result,$cached)=&is_cached_new('userres',$hashid);
       $udom,$uname);   if (!defined($cached)) {
  my ($tmp)=keys(%resourcedata);      my %resourcedata=&dump('resourcedata',$udom,$uname);
       $result=\%resourcedata;
       &do_cache_new('userres',$hashid,$result);
    }
    my ($tmp)=keys(%$result);
  if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {   if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
     if ($resourcedata{$courselevelr}) {      if ($$result{$courselevelr}) {
  return $resourcedata{$courselevelr}; }   return $$result{$courselevelr}; }
     if ($resourcedata{$courselevelm}) {      if ($$result{$courselevelm}) {
  return $resourcedata{$courselevelm}; }   return $$result{$courselevelm}; }
     if ($resourcedata{$courselevel}) {      if ($$result{$courselevel}) {
  return $resourcedata{$courselevel}; }   return $$result{$courselevel}; }
  } else {   } else {
     if ($tmp!~/No such file/) {      #error 2 occurs when the .db doesn't exist
       if ($tmp!~/error: 2 /) {
  &logthis("<font color=blue>WARNING:".   &logthis("<font color=blue>WARNING:".
  " Trying to get resource data for ".   " Trying to get resource data for ".
  $uname." at ".$udom.": ".   $uname." at ".$udom.": ".
  $tmp."</font>");   $tmp."</font>");
     } elsif ($tmp=~/error:No such file/) {      } elsif ($tmp=~/error: 2 /) {
                         &EXT_cache_set($udom,$uname);   &EXT_cache_set($udom,$uname);
     } elsif ($tmp =~ /^(con_lost|no_such_host)/) {      } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
  return $tmp;   return $tmp;
     }      }
  }   }
     }      }
   
 # -------------------------------------------------------- second, check course  # ------------------------------------------------ second, check some of course
   
     my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},      my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
   $ENV{'course.'.$courseid.'.domain'},     $ENV{'course.'.$courseid.'.domain'},
   ($seclevelr,$seclevelm,$seclevel,     ($seclevelr,$seclevelm,$seclevel,
    $courselevelr,$courselevelm,      $courselevelr));
    $courselevel));  
     if (defined($coursereply)) { return $coursereply; }      if (defined($coursereply)) { return $coursereply; }
   
 # ------------------------------------------------------ third, check map parms  # ------------------------------------------------------ third, check map parms
Line 3395  sub EXT { Line 4315  sub EXT {
     }      }
     if ($thisparm) { return $thisparm; }      if ($thisparm) { return $thisparm; }
  }   }
 # --------------------------------------------- last, look in resource metadata  # ------------------------------------------ fourth, look in resource metadata
   
  $spacequalifierrest=~s/\./\_/;   $spacequalifierrest=~s/\./\_/;
  my $filename;   my $filename;
  if (!$symbparm) { $symbparm=&symbread(); }   if (!$symbparm) { $symbparm=&symbread(); }
  if ($symbparm) {   if ($symbparm) {
     $filename=(split(/\_\_\_/,$symbparm))[2];      $filename=(&decode_symb($symbparm))[2];
  } else {   } else {
     $filename=$ENV{'request.filename'};      $filename=$ENV{'request.filename'};
  }   }
Line 3410  sub EXT { Line 4330  sub EXT {
  $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);   $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
  if (defined($metadata)) { return $metadata; }   if (defined($metadata)) { return $metadata; }
   
   # ---------------------------------------------- fourth, look in rest pf course
    if ($symbparm && defined($courseid) && 
       $courseid eq $ENV{'request.course.id'}) {
       my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
      $ENV{'course.'.$courseid.'.domain'},
      ($courselevelm,$courselevel));
       if (defined($coursereply)) { return $coursereply; }
    }
 # ------------------------------------------------------------------ Cascade up  # ------------------------------------------------------------------ Cascade up
  unless ($space eq '0') {   unless ($space eq '0') {
     my @parts=split(/_/,$space);      my @parts=split(/_/,$space);
Line 3417  sub EXT { Line 4345  sub EXT {
     my $part=join('_',@parts);      my $part=join('_',@parts);
     if ($part eq '') { $part='0'; }      if ($part eq '') { $part='0'; }
     my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,      my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
  $symbparm,$udom,$uname);   $symbparm,$udom,$uname,$section,1);
     if (defined($partgeneral)) { return $partgeneral; }      if (defined($partgeneral)) { return $partgeneral; }
  }   }
    if ($recurse) { return undef; }
    my $pack_def=&packages_tab_default($filename,$varname);
    if (defined($pack_def)) { return $pack_def; }
   
 # ---------------------------------------------------- Any other user namespace  # ---------------------------------------------------- Any other user namespace
     } elsif ($realm eq 'environment') {      } elsif ($realm eq 'environment') {
Line 3440  sub EXT { Line 4371  sub EXT {
     return '';      return '';
 }  }
   
   sub packages_tab_default {
       my ($uri,$varname)=@_;
       my (undef,$part,$name)=split(/\./,$varname);
       my $packages=&metadata($uri,'packages');
       foreach my $package (split(/,/,$packages)) {
    my ($pack_type,$pack_part)=split(/_/,$package,2);
    if (defined($packagetab{"$pack_type&$name&default"})) {
       return $packagetab{"$pack_type&$name&default"};
    }
    if ($pack_type eq 'part') { $pack_part='0'; }
    if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
       return $packagetab{$pack_type."_".$pack_part."&$name&default"};
    }
       }
       return undef;
   }
   
 sub add_prefix_and_part {  sub add_prefix_and_part {
     my ($prefix,$part)=@_;      my ($prefix,$part)=@_;
     my $keyroot;      my $keyroot;
Line 3458  sub add_prefix_and_part { Line 4406  sub add_prefix_and_part {
   
 # ---------------------------------------------------------------- Get metadata  # ---------------------------------------------------------------- Get metadata
   
   my %metaentry;
 sub metadata {  sub metadata {
     my ($uri,$what,$liburi,$prefix,$depthcount)=@_;      my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
   
     $uri=&declutter($uri);      $uri=&declutter($uri);
     # if it is a non metadata possible uri return quickly      # if it is a non metadata possible uri return quickly
     if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||      if (($uri eq '') || 
         ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {   (($uri =~ m|^/*adm/|) && 
  return '';       ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
           ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
    ($uri =~ m|home/[^/]+/public_html/|)) {
    return undef;
     }      }
     my $filename=$uri;      my $filename=$uri;
     $uri=~s/\.meta$//;      $uri=~s/\.meta$//;
Line 3474  sub metadata { Line 4425  sub metadata {
 # Look at timestamp of caching  # Look at timestamp of caching
 # Everything is cached by the main uri, libraries are never directly cached  # Everything is cached by the main uri, libraries are never directly cached
 #  #
     unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {      if (!defined($liburi)) {
    my ($result,$cached)=&is_cached_new('meta',$uri);
    if (defined($cached)) { return $result->{':'.$what}; }
       }
       {
 #  #
 # Is this a recursive call for a library?  # Is this a recursive call for a library?
 #  #
   # if (! exists($metacache{$uri})) {
   #    $metacache{$uri}={};
   # }
         if ($liburi) {          if ($liburi) {
     $liburi=&declutter($liburi);      $liburi=&declutter($liburi);
             $filename=$liburi;              $filename=$liburi;
         }          } else {
       &devalidate_cache_new('meta',$uri);
       undef(%metaentry);
    }
         my %metathesekeys=();          my %metathesekeys=();
         unless ($filename=~/\.meta$/) { $filename.='.meta'; }          unless ($filename=~/\.meta$/) { $filename.='.meta'; }
  my $metastring=&getfile(&filelocation('',&clutter($filename)));   my $metastring;
    if ($uri !~ m -^(uploaded|editupload)/-) {
       my $file=&filelocation('',&clutter($filename));
       #push(@{$metaentry{$uri.'.file'}},$file);
       $metastring=&getfile($file);
    }
         my $parser=HTML::LCParser->new(\$metastring);          my $parser=HTML::LCParser->new(\$metastring);
         my $token;          my $token;
         undef %metathesekeys;          undef %metathesekeys;
  delete($metacache{$uri.':packages'});  
         while ($token=$parser->get_token) {          while ($token=$parser->get_token) {
     if ($token->[0] eq 'S') {      if ($token->[0] eq 'S') {
  if (defined($token->[2]->{'package'})) {   if (defined($token->[2]->{'package'})) {
Line 3500  sub metadata { Line 4465  sub metadata {
     if (defined($token->[2]->{'id'})) {       if (defined($token->[2]->{'id'})) { 
  $keyroot.='_'.$token->[2]->{'id'};    $keyroot.='_'.$token->[2]->{'id'}; 
     }      }
     if ($metacache{$uri.':packages'}) {      if ($metaentry{':packages'}) {
  $metacache{$uri.':packages'}.=','.$package.$keyroot;   $metaentry{':packages'}.=','.$package.$keyroot;
     } else {      } else {
  $metacache{$uri.':packages'}=$package.$keyroot;   $metaentry{':packages'}=$package.$keyroot;
     }      }
     foreach (keys %packagetab) {      foreach (keys %packagetab) {
  if ($_=~/^$package\&/) {   my $part=$keyroot;
    $part=~s/^\_//;
    if ($_=~/^\Q$package\E\&/ || 
       $_=~/^\Q$package\E_0\&/) {
     my ($pack,$name,$subp)=split(/\&/,$_);      my ($pack,$name,$subp)=split(/\&/,$_);
       # ignore package.tab specified default values
                               # here &package_tab_default() will fetch those
       if ($subp eq 'default') { next; }
     my $value=$packagetab{$_};      my $value=$packagetab{$_};
     my $part=$keyroot;      my $unikey;
     $part=~s/^\_//;      if ($pack =~ /_0$/) {
     if ($subp eq 'display') {  
  $value.=' [Part: '.$part.']';  
     }  
     my $unikey='parameter'.$keyroot.'_'.$name;  
     if ($subp eq 'default') {  
  $unikey='parameter_0_'.$name;   $unikey='parameter_0_'.$name;
  $metacache{$uri.':'.$unikey.'.part'}='0';   $part=0;
     } else {      } else {
  $metacache{$uri.':'.$unikey.'.part'}=$part;   $unikey='parameter'.$keyroot.'_'.$name;
  $metathesekeys{$unikey}=1;  
     }      }
     unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {      if ($subp eq 'display') {
  $metacache{$uri.':'.$unikey.'.'.$subp}=$value;   $value.=' [Part: '.$part.']';
       }
       $metaentry{':'.$unikey.'.part'}=$part;
       $metathesekeys{$unikey}=1;
       unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
    $metaentry{':'.$unikey.'.'.$subp}=$value;
     }      }
     if (defined($metacache{$uri.':'.$unikey.'.default'})) {      if (defined($metaentry{':'.$unikey.'.default'})) {
  $metacache{$uri.':'.$unikey}=   $metaentry{':'.$unikey}=
     $metacache{$uri.':'.$unikey.'.default'};      $metaentry{':'.$unikey.'.default'};
     }      }
  }   }
     }      }
Line 3560  sub metadata { Line 4530  sub metadata {
     foreach (sort(split(/\,/,&metadata($uri,'keys',      foreach (sort(split(/\,/,&metadata($uri,'keys',
        $location,$unikey,         $location,$unikey,
        $depthcount+1)))) {         $depthcount+1)))) {
    $metaentry{':'.$_}=$metaentry{':'.$_};
  $metathesekeys{$_}=1;   $metathesekeys{$_}=1;
     }      }
  }   }
Line 3570  sub metadata { Line 4541  sub metadata {
  }   }
  $metathesekeys{$unikey}=1;   $metathesekeys{$unikey}=1;
  foreach (@{$token->[3]}) {   foreach (@{$token->[3]}) {
     $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};      $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
  }   }
  my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));   my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
  my $default=$metacache{$uri.':'.$unikey.'.default'};   my $default=$metaentry{':'.$unikey.'.default'};
  if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {   if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
  # only ws inside the tag, and not in default, so use default   # only ws inside the tag, and not in default, so use default
  # as value   # as value
     $metacache{$uri.':'.$unikey}=$default;      $metaentry{':'.$unikey}=$default;
  } else {   } else {
   # either something interesting inside the tag or default    # either something interesting inside the tag or default
                   # uninteresting                    # uninteresting
     $metacache{$uri.':'.$unikey}=$internaltext;      $metaentry{':'.$unikey}=$internaltext;
  }   }
 # end of not-a-package not-a-library import  # end of not-a-package not-a-library import
     }      }
Line 3590  sub metadata { Line 4561  sub metadata {
 # the next is the end of "start tag"  # the next is the end of "start tag"
     }      }
  }   }
    my ($extension) = ($uri =~ /\.(\w+)$/);
    foreach my $key (sort(keys(%packagetab))) {
       #&logthis("extsion1 $extension $key !!");
       #no specific packages #how's our extension
       if ($key!~/^extension_\Q$extension\E&/) { next; }
       &metadata_create_package_def($uri,$key,'extension_'.$extension,
    \%metathesekeys);
    }
    if (!exists($metaentry{':packages'})) {
       foreach my $key (sort(keys(%packagetab))) {
    #no specific packages well let's get default then
    if ($key!~/^default&/) { next; }
    &metadata_create_package_def($uri,$key,'default',
        \%metathesekeys);
       }
    }
 # are there custom rights to evaluate  # are there custom rights to evaluate
  if ($metacache{$uri.':copyright'} eq 'custom') {   if ($metaentry{':copyright'} eq 'custom') {
   
     #      #
     # Importing a rights file here      # Importing a rights file here
     #      #
     unless ($depthcount) {      unless ($depthcount) {
  my $location=$metacache{$uri.':customdistributionfile'};   my $location=$metaentry{':customdistributionfile'};
  my $dir=$filename;   my $dir=$filename;
  $dir=~s|[^/]*$||;   $dir=~s|[^/]*$||;
  $location=&filelocation($dir,$location);   $location=&filelocation($dir,$location);
  foreach (sort(split(/\,/,&metadata($uri,'keys',   foreach (sort(split(/\,/,&metadata($uri,'keys',
    $location,'_rights',     $location,'_rights',
    $depthcount+1)))) {     $depthcount+1)))) {
       #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
     $metathesekeys{$_}=1;      $metathesekeys{$_}=1;
  }   }
     }      }
  }   }
  $metacache{$uri.':keys'}=join(',',keys %metathesekeys);   $metaentry{':keys'}=join(',',keys %metathesekeys);
  &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);   &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
  $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);   $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
  $metacache{$uri.':cachedtimestamp'}=time;   &do_cache_new('meta',$uri,\%metaentry);
 # this is the end of "was not already recently cached  # this is the end of "was not already recently cached
     }      }
     return $metacache{$uri.':'.$what};      return $metaentry{':'.$what};
   }
   
   sub metadata_create_package_def {
       my ($uri,$key,$package,$metathesekeys)=@_;
       my ($pack,$name,$subp)=split(/\&/,$key);
       if ($subp eq 'default') { next; }
       
       if (defined($metaentry{':packages'})) {
    $metaentry{':packages'}.=','.$package;
       } else {
    $metaentry{':packages'}=$package;
       }
       my $value=$packagetab{$key};
       my $unikey;
       $unikey='parameter_0_'.$name;
       $metaentry{':'.$unikey.'.part'}=0;
       $$metathesekeys{$unikey}=1;
       unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
    $metaentry{':'.$unikey.'.'.$subp}=$value;
       }
       if (defined($metaentry{':'.$unikey.'.default'})) {
    $metaentry{':'.$unikey}=
       $metaentry{':'.$unikey.'.default'};
       }
 }  }
   
 sub metadata_generate_part0 {  sub metadata_generate_part0 {
Line 3622  sub metadata_generate_part0 { Line 4634  sub metadata_generate_part0 {
     my %allnames;      my %allnames;
     foreach my $metakey (sort keys %$metadata) {      foreach my $metakey (sort keys %$metadata) {
  if ($metakey=~/^parameter\_(.*)/) {   if ($metakey=~/^parameter\_(.*)/) {
   my $part=$$metacache{$uri.':'.$metakey.'.part'};    my $part=$$metacache{':'.$metakey.'.part'};
   my $name=$$metacache{$uri.':'.$metakey.'.name'};    my $name=$$metacache{':'.$metakey.'.name'};
   if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {    if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
     $allnames{$name}=$part;      $allnames{$name}=$part;
   }    }
Line 3631  sub metadata_generate_part0 { Line 4643  sub metadata_generate_part0 {
     }      }
     foreach my $name (keys(%allnames)) {      foreach my $name (keys(%allnames)) {
       $$metadata{"parameter_0_$name"}=1;        $$metadata{"parameter_0_$name"}=1;
       my $key="$uri:parameter_0_$name";        my $key=":parameter_0_$name";
       $$metacache{"$key.part"}='0';        $$metacache{"$key.part"}='0';
       $$metacache{"$key.name"}=$name;        $$metacache{"$key.name"}=$name;
       $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.        $$metacache{"$key.type"}=$$metacache{':parameter_'.
    $allnames{$name}.'_'.$name.     $allnames{$name}.'_'.$name.
    '.type'};     '.type'};
       my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.        my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
      '.display'};       '.display'};
       my $expr='\\[Part: '.$allnames{$name}.'\\]';        my $expr='\\[Part: '.$allnames{$name}.'\\]';
       $olddis=~s/$expr/\[Part: 0\]/;        $olddis=~s/\Q$expr\E/\[Part: 0\]/;
       $$metacache{"$key.display"}=$olddis;        $$metacache{"$key.display"}=$olddis;
     }      }
 }  }
Line 3650  sub metadata_generate_part0 { Line 4662  sub metadata_generate_part0 {
 sub gettitle {  sub gettitle {
     my $urlsymb=shift;      my $urlsymb=shift;
     my $symb=&symbread($urlsymb);      my $symb=&symbread($urlsymb);
     unless ($symb) {      if ($symb) {
  unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }   my $key=$ENV{'request.course.id'}."\0".$symb;
         return &metadata($urlsymb,'title');    my ($result,$cached)=&is_cached_new('title',$key);
     }   if (defined($cached)) { 
     if ($titlecache{$symb}) {      return $result;
  if (time < ($titlecache{$symb}[1] + 600)) {  
     return $titlecache{$symb}[0];  
  } else {  
     delete($titlecache{$symb});  
  }   }
    my ($map,$resid,$url)=&decode_symb($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) {
       return &do_cache_new('title',$key,$title,600);
    }
    $urlsymb=$url;
     }      }
     my ($map,$resid,$url)=split(/\_\_\_/,$symb);      my $title=&metadata($urlsymb,'title');
     my $title='';      if (!$title) { $title=(split('/',$urlsymb))[-1]; }    
     my %bighash;      return $title;
     if (tie(%bighash,'GDBM_File',$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,time];  
         return $title;  
     } else {  
  return &metadata($urlsymb,'title');  
     }  
 }  }
           
 # ------------------------------------------------- Update symbolic store links  # ------------------------------------------------- Update symbolic store links
   
 sub symblist {  sub symblist {
     my ($mapname,%newhash)=@_;      my ($mapname,%newhash)=@_;
     $mapname=declutter($mapname);      $mapname=&deversion(&declutter($mapname));
     my %hash;      my %hash;
     if (($ENV{'request.course.fn'}) && (%newhash)) {      if (($ENV{'request.course.fn'}) && (%newhash)) {
         if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',          if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
                       &GDBM_WRCREAT(),0640)) {                        &GDBM_WRCREAT(),0640)) {
     foreach (keys %newhash) {      foreach (keys %newhash) {
                 $hash{declutter($_)}=$mapname.'___'.$newhash{$_};                  $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
     $newhash{$_}->[0]);
             }              }
             if (untie(%hash)) {              if (untie(%hash)) {
  return 'ok';   return 'ok';
Line 3702  sub symblist { Line 4712  sub symblist {
 # --------------------------------------------------------------- Verify a symb  # --------------------------------------------------------------- Verify a symb
   
 sub symbverify {  sub symbverify {
     my ($symb,$thisfn)=@_;      my ($symb,$thisurl)=@_;
       my $thisfn=$thisurl;
   # wrapper not part of symbs
       $thisfn=~s/^\/adm\/wrapper//;
     $thisfn=&declutter($thisfn);      $thisfn=&declutter($thisfn);
 # direct jump to resource in page or to a sequence - will construct own symbs  # direct jump to resource in page or to a sequence - will construct own symbs
     if ($thisfn=~/\.(page|sequence)$/) { return 1; }      if ($thisfn=~/\.(page|sequence)$/) { return 1; }
 # check URL part  # check URL part
     my ($map,$resid,$url)=split(/\_\_\_/,$symb);      my ($map,$resid,$url)=&decode_symb($symb);
     unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }  
       unless ($url eq $thisfn) { return 0; }
   
     $symb=&symbclean($symb);      $symb=&symbclean($symb);
       $thisurl=&deversion($thisurl);
       $thisfn=&deversion($thisfn);
   
     my %bighash;      my %bighash;
     my $okay=0;      my $okay=0;
   
     if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',      if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {                              &GDBM_READER(),0640)) {
         my $ids=$bighash{'ids_'.&clutter($thisfn)};          my $ids=$bighash{'ids_'.&clutter($thisurl)};
         unless ($ids) {           unless ($ids) { 
            $ids=$bighash{'ids_/'.$thisfn};             $ids=$bighash{'ids_/'.$thisurl};
         }          }
         if ($ids) {          if ($ids) {
 # ------------------------------------------------------------------- Has ID(s)  # ------------------------------------------------------------------- Has ID(s)
Line 3727  sub symbverify { Line 4744  sub symbverify {
                if (                 if (
   &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)    &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
    eq $symb) {      eq $symb) { 
                   $okay=1;      if (($ENV{'request.role.adv'}) ||
                }         $bighash{'encrypted_'.$_} eq $ENV{'request.enc'}) {
          $okay=1; 
      }
          }
    }     }
         }          }
  untie(%bighash);   untie(%bighash);
Line 3740  sub symbverify { Line 4760  sub symbverify {
   
 sub symbclean {  sub symbclean {
     my $symb=shift;      my $symb=shift;
       if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
 # remove version from map  # remove version from map
     $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;      $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
   
 # remove version from URL  # remove version from URL
     $symb=~s/\.(\d+)\.(\w+)$/\.$2/;      $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
   
   # remove wrapper
   
       $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
     return $symb;      return $symb;
 }  }
   
   # ---------------------------------------------- Split symb to find map and url
   
   sub encode_symb {
       my ($map,$resid,$url)=@_;
       return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
   }
   
   sub decode_symb {
       my $symb=shift;
       if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
       my ($map,$resid,$url)=split(/___/,$symb);
       return (&fixversion($map),$resid,&fixversion($url));
   }
   
   sub fixversion {
       my $fn=shift;
       if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
       my %bighash;
       my $uri=&clutter($fn);
       my $key=$ENV{'request.course.id'}.'_'.$uri;
   # is this cached?
       my ($result,$cached)=&is_cached_new('courseresversion',$key);
       if (defined($cached)) { return $result; }
   # unfortunately not cached, or expired
       if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
       &GDBM_READER(),0640)) {
     if ($bighash{'version_'.$uri}) {
        my $version=$bighash{'version_'.$uri};
        unless (($version eq 'mostrecent') || 
       ($version==&getversion($uri))) {
     $uri=~s/\.(\w+)$/\.$version\.$1/;
        }
     }
     untie %bighash;
       }
       return &do_cache_new('courseresversion',$key,&declutter($uri),600);
   }
   
   sub deversion {
       my $url=shift;
       $url=~s/\.\d+\.(\w+)$/\.$1/;
       return $url;
   }
   
 # ------------------------------------------------------ Return symb list entry  # ------------------------------------------------------ Return symb list entry
   
 sub symbread {  sub symbread {
     my ($thisfn,$donotrecurse)=@_;      my ($thisfn,$donotrecurse)=@_;
       my $cache_str='request.symbread.cached.'.$thisfn;
       if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
 # no filename provided? try from environment  # no filename provided? try from environment
     unless ($thisfn) {      unless ($thisfn) {
         if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }          if ($ENV{'request.symb'}) {
       return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
    }
  $thisfn=$ENV{'request.filename'};   $thisfn=$ENV{'request.filename'};
     }      }
       if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
 # is that filename actually a symb? Verify, clean, and return  # is that filename actually a symb? Verify, clean, and return
     if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {      if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
  if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }   if (&symbverify($thisfn,$1)) {
       return $ENV{$cache_str}=&symbclean($thisfn);
    }
     }      }
     $thisfn=declutter($thisfn);      $thisfn=declutter($thisfn);
     my %hash;      my %hash;
     my %bighash;      my %bighash;
     my $syval='';      my $syval='';
     if (($ENV{'request.course.fn'}) && ($thisfn)) {      if (($ENV{'request.course.fn'}) && ($thisfn)) {
           my $targetfn = $thisfn;
           if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
               $targetfn = 'adm/wrapper/'.$thisfn;
           }
         if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',          if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
                       &GDBM_READER(),0640)) {                        &GDBM_READER(),0640)) {
     $syval=$hash{$thisfn};      $syval=$hash{$targetfn};
             untie(%hash);              untie(%hash);
         }          }
 # ---------------------------------------------------------- There was an entry  # ---------------------------------------------------------- There was an entry
         if ($syval) {          if ($syval) {
            unless ($syval=~/\_\d+$/) {      #unless ($syval=~/\_\d+$/) {
        unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {   #unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
                   &appenv('request.ambiguous' => $thisfn);      #&appenv('request.ambiguous' => $thisfn);
                   return '';      #return $ENV{$cache_str}='';
                }       #}    
                $syval.=$1;   #$syval.=$1;
    }      #}
         } else {          } else {
 # ------------------------------------------------------- Was not in symb table  # ------------------------------------------------------- Was not in symb table
            if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',             if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
Line 3822  sub symbread { Line 4900  sub symbread {
                  }                   }
       }        }
               untie(%bighash)                untie(%bighash)
            }              }
         }          }
         if ($syval) {          if ($syval) {
            return &symbclean($syval.'___'.$thisfn);       return $ENV{$cache_str}=$syval;
       #return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
         }          }
     }      }
     &appenv('request.ambiguous' => $thisfn);      &appenv('request.ambiguous' => $thisfn);
     return '';      return $ENV{$cache_str}='';
 }  }
   
 # ---------------------------------------------------------- Return random seed  # ---------------------------------------------------------- Return random seed
Line 3843  sub numval { Line 4922  sub numval {
     $txt=~tr/U-Z/0-5/;      $txt=~tr/U-Z/0-5/;
     $txt=~tr/u-z/0-5/;      $txt=~tr/u-z/0-5/;
     $txt=~s/\D//g;      $txt=~s/\D//g;
       if ($_64bit) { if ($txt > 2**32) { return -1; } }
     return int($txt);      return int($txt);
 }  }
   
   sub numval2 {
       my $txt=shift;
       $txt=~tr/A-J/0-9/;
       $txt=~tr/a-j/0-9/;
       $txt=~tr/K-T/0-9/;
       $txt=~tr/k-t/0-9/;
       $txt=~tr/U-Z/0-5/;
       $txt=~tr/u-z/0-5/;
       $txt=~s/\D//g;
       my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
       my $total;
       foreach my $val (@txts) { $total+=$val; }
       if ($_64bit) { if ($total > 2**32) { return -1; } }
       return int($total);
   }
   
   sub numval3 {
       use integer;
       my $txt=shift;
       $txt=~tr/A-J/0-9/;
       $txt=~tr/a-j/0-9/;
       $txt=~tr/K-T/0-9/;
       $txt=~tr/k-t/0-9/;
       $txt=~tr/U-Z/0-5/;
       $txt=~tr/u-z/0-5/;
       $txt=~s/\D//g;
       my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
       my $total;
       foreach my $val (@txts) { $total+=$val; }
       if ($_64bit) { $total=(($total<<32)>>32); }
       return $total;
   }
   
 sub latest_rnd_algorithm_id {  sub latest_rnd_algorithm_id {
     return '64bit';      return '64bit4';
   }
   
   sub get_rand_alg {
       my ($courseid)=@_;
       if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
       if ($courseid) {
    return $ENV{"course.$courseid.rndseed"};
       }
       return &latest_rnd_algorithm_id();
   }
   
   sub validCODE {
       my ($CODE)=@_;
       if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
       return 0;
   }
   
   sub getCODE {
       if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
       if (defined($Apache::lonhomework::parsing_a_problem) &&
    &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
    return $Apache::lonhomework::history{'resource.CODE'};
       }
       return undef;
 }  }
   
 sub rndseed {  sub rndseed {
Line 3860  sub rndseed { Line 4997  sub rndseed {
     if (!$courseid) { $courseid=$wcourseid; }      if (!$courseid) { $courseid=$wcourseid; }
     if (!$domain) { $domain=$wdomain; }      if (!$domain) { $domain=$wdomain; }
     if (!$username) { $username=$wusername }      if (!$username) { $username=$wusername }
     my $which=$ENV{"course.$courseid.rndseed"};      my $which=&get_rand_alg();
     my $CODE=$ENV{'scantron.CODE'};      if (defined(&getCODE())) {
     if (defined($CODE)) {   if ($which eq '64bit4') {
  &rndseed_CODE_64bit($symb,$courseid,$domain,$username);      return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
    } else {
       return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
    }
       } elsif ($which eq '64bit4') {
    return &rndseed_64bit4($symb,$courseid,$domain,$username);
       } elsif ($which eq '64bit3') {
    return &rndseed_64bit3($symb,$courseid,$domain,$username);
       } elsif ($which eq '64bit2') {
    return &rndseed_64bit2($symb,$courseid,$domain,$username);
     } elsif ($which eq '64bit') {      } elsif ($which eq '64bit') {
  return &rndseed_64bit($symb,$courseid,$domain,$username);   return &rndseed_64bit($symb,$courseid,$domain,$username);
     }      }
Line 3883  sub rndseed_32bit { Line 5029  sub rndseed_32bit {
  my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;   my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
  #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");   #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
  #&Apache::lonxml::debug("rndseed :$num:$symb");   #&Apache::lonxml::debug("rndseed :$num:$symb");
    if ($_64bit) { $num=(($num<<32)>>32); }
  return $num;   return $num;
     }      }
 }  }
Line 3903  sub rndseed_64bit { Line 5050  sub rndseed_64bit {
  my $num2=$nameseed+$domainseed+$courseseed;   my $num2=$nameseed+$domainseed+$courseseed;
  #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");   #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
  #&Apache::lonxml::debug("rndseed :$num:$symb");   #&Apache::lonxml::debug("rndseed :$num:$symb");
    if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
    if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
    return "$num1,$num2";
       }
   }
   
   sub rndseed_64bit2 {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    # strings need to be an even # of cahracters long, it it is odd the
           # last characters gets thrown away
    my $symbchck=unpack("%32S*",$symb.' ') << 21;
    my $symbseed=numval($symb) << 10;
    my $namechck=unpack("%32S*",$username.' ');
   
    my $nameseed=numval($username) << 21;
    my $domainseed=unpack("%32S*",$domain.' ') << 10;
    my $courseseed=unpack("%32S*",$courseid.' ');
   
    my $num1=$symbchck+$symbseed+$namechck;
    my $num2=$nameseed+$domainseed+$courseseed;
    #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
    #&Apache::lonxml::debug("rndseed :$num:$symb");
  return "$num1,$num2";   return "$num1,$num2";
     }      }
 }  }
   
   sub rndseed_64bit3 {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    # strings need to be an even # of cahracters long, it it is odd the
           # last characters gets thrown away
    my $symbchck=unpack("%32S*",$symb.' ') << 21;
    my $symbseed=numval2($symb) << 10;
    my $namechck=unpack("%32S*",$username.' ');
   
    my $nameseed=numval2($username) << 21;
    my $domainseed=unpack("%32S*",$domain.' ') << 10;
    my $courseseed=unpack("%32S*",$courseid.' ');
   
    my $num1=$symbchck+$symbseed+$namechck;
    my $num2=$nameseed+$domainseed+$courseseed;
    #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
    #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
    if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
   
    return "$num1:$num2";
       }
   }
   
   sub rndseed_64bit4 {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    # strings need to be an even # of cahracters long, it it is odd the
           # last characters gets thrown away
    my $symbchck=unpack("%32S*",$symb.' ') << 21;
    my $symbseed=numval3($symb) << 10;
    my $namechck=unpack("%32S*",$username.' ');
   
    my $nameseed=numval3($username) << 21;
    my $domainseed=unpack("%32S*",$domain.' ') << 10;
    my $courseseed=unpack("%32S*",$courseid.' ');
   
    my $num1=$symbchck+$symbseed+$namechck;
    my $num2=$nameseed+$domainseed+$courseseed;
    #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
    #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
    if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
   
    return "$num1:$num2";
       }
   }
   
 sub rndseed_CODE_64bit {  sub rndseed_CODE_64bit {
     my ($symb,$courseid,$domain,$username)=@_;      my ($symb,$courseid,$domain,$username)=@_;
     {      {
  use integer;   use integer;
  my $symbchck=unpack("%32S*",$symb) << 16;   my $symbchck=unpack("%32S*",$symb.' ') << 16;
  my $symbseed=numval($symb);   my $symbseed=numval2($symb);
  my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;   my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
  my $courseseed=unpack("%32S*",$courseid);   my $CODEseed=numval(&getCODE());
  my $num1=$symbseed+$CODEseed;   my $courseseed=unpack("%32S*",$courseid.' ');
  my $num2=$courseseed+$symbchck;   my $num1=$symbseed+$CODEchck;
  #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");   my $num2=$CODEseed+$courseseed+$symbchck;
    #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
  #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");   #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
  return "$num1,$num2";   if ($_64bit) { $num1=(($num1<<32)>>32); }
    if ($_64bit) { $num2=(($num2<<32)>>32); }
    return "$num1:$num2";
       }
   }
   
   sub rndseed_CODE_64bit4 {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    my $symbchck=unpack("%32S*",$symb.' ') << 16;
    my $symbseed=numval3($symb);
    my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
    my $CODEseed=numval3(&getCODE());
    my $courseseed=unpack("%32S*",$courseid.' ');
    my $num1=$symbseed+$CODEchck;
    my $num2=$CODEseed+$courseseed+$symbchck;
    #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
    #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
    if ($_64bit) { $num1=(($num1<<32)>>32); }
    if ($_64bit) { $num2=(($num2<<32)>>32); }
    return "$num1:$num2";
     }      }
 }  }
   
 sub setup_random_from_rndseed {  sub setup_random_from_rndseed {
     my ($rndseed)=@_;      my ($rndseed)=@_;
     if ($rndseed =~/,/) {      if ($rndseed =~/([,:])/) {
  my ($num1,$num2)=split(/,/,$rndseed);   my ($num1,$num2)=split(/[,:]/,$rndseed);
  &Math::Random::random_set_seed(abs($num1),abs($num2));   &Math::Random::random_set_seed(abs($num1),abs($num2));
     } else {      } else {
  &Math::Random::random_set_seed_from_phrase($rndseed);   &Math::Random::random_set_seed_from_phrase($rndseed);
     }      }
 }  }
   
   sub latest_receipt_algorithm_id {
       return 'receipt2';
   }
   
   sub recunique {
       my $fucourseid=shift;
       my $unique;
       if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
    $unique=$ENV{"course.$fucourseid.internal.encseed"};
       } else {
    $unique=$perlvar{'lonReceipt'};
       }
       return unpack("%32C*",$unique);
   }
   
   sub recprefix {
       my $fucourseid=shift;
       my $prefix;
       if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
    $prefix=$ENV{"course.$fucourseid.internal.encpref"};
       } else {
    $prefix=$perlvar{'lonHostID'};
       }
       return unpack("%32C*",$prefix);
   }
   
 sub ireceipt {  sub ireceipt {
     my ($funame,$fudom,$fucourseid,$fusymb)=@_;      my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
     my $cuname=unpack("%32C*",$funame);      my $cuname=unpack("%32C*",$funame);
     my $cudom=unpack("%32C*",$fudom);      my $cudom=unpack("%32C*",$fudom);
     my $cucourseid=unpack("%32C*",$fucourseid);      my $cucourseid=unpack("%32C*",$fucourseid);
     my $cusymb=unpack("%32C*",$fusymb);      my $cusymb=unpack("%32C*",$fusymb);
     my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});      my $cunique=&recunique($fucourseid);
     return unpack("%32C*",$perlvar{'lonHostID'}).'-'.      my $cpart=unpack("%32S*",$part);
            ($cunique%$cuname+      my $return =&recprefix($fucourseid).'-';
             $cunique%$cudom+      if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
             $cusymb%$cuname+   $ENV{'request.state'} eq 'construct') {
             $cusymb%$cudom+   &Apache::lonxml::debug("doing receipt2  using parts $cpart, uname $cuname and udom $cudom gets  ".($cpart%$cuname).
             $cucourseid%$cuname+         " and ".($cpart%$cudom));
             $cucourseid%$cudom);         
    $return.= ($cunique%$cuname+
      $cunique%$cudom+
      $cusymb%$cuname+
      $cusymb%$cudom+
      $cucourseid%$cuname+
      $cucourseid%$cudom+
      $cpart%$cuname+
      $cpart%$cudom);
       } else {
    $return.= ($cunique%$cuname+
      $cunique%$cudom+
      $cusymb%$cuname+
      $cusymb%$cudom+
      $cucourseid%$cuname+
      $cucourseid%$cudom);
       }
       return $return;
 }  }
   
 sub receipt {  sub receipt {
   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();      my ($part)=@_;
   return &ireceipt($name,$domain,$courseid,$symb);      my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
       return &ireceipt($name,$domain,$courseid,$symb,$part);
 }  }
   
 # ------------------------------------------------------------ Serves up a file  # ------------------------------------------------------------ Serves up a file
 # returns either the contents of the file or a -1  # returns either the contents of the file or 
   # -1 if the file doesn't exist
   #
   # if the target is a file that was uploaded via DOCS, 
   # a check will be made to see if a current copy exists on the local server,
   # if it does this will be served, otherwise a copy will be retrieved from
   # the home server for the course and stored in /home/httpd/html/userfiles on
   # the local server.   
   
 sub getfile {  sub getfile {
  my $file=shift;      my ($file) = @_;
  if ($file=~/^\/*uploaded\//) { # user file      if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
       &repcopy($file);
       return &readfile($file);
   }
   
   sub repcopy_userfile {
       my ($file)=@_;
       if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
       if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
       my ($cdom,$cnum,$filename) = 
    ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
       my ($info,$rtncode);
       my $uri="/uploaded/$cdom/$cnum/$filename";
       if (-e "$file") {
    my @fileinfo = stat($file);
    my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
    if ($lwpresp ne 'ok') {
       if ($rtncode eq '404') {
    unlink($file);
       }
       #my $ua=new LWP::UserAgent;
       #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
       #my $response=$ua->request($request);
       #if ($response->is_success()) {
    # return $response->content;
    #    } else {
    # return -1;
    #    }
       return -1;
    }
    if ($info < $fileinfo[9]) {
       return 'ok';
    }
    $info = '';
    $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
    if ($lwpresp ne 'ok') {
       return -1;
    }
       } else {
    my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
    if ($lwpresp ne 'ok') {
       my $ua=new LWP::UserAgent;
       my $request=new HTTP::Request('GET',&tokenwrapper($uri));
       my $response=$ua->request($request);
       if ($response->is_success()) {
    $info=$response->content;
       } else {
    return -1;
       }
    }
    my @parts = ($cdom,$cnum); 
    if ($filename =~ m|^(.+)/[^/]+$|) {
       push @parts, split(/\//,$1);
    }
    my $path = $perlvar{'lonDocRoot'}.'/userfiles';
    foreach my $part (@parts) {
       $path .= '/'.$part;
       if (!-e $path) {
    mkdir($path,0770);
       }
    }
       }
       open(FILE,">$file");
       print FILE $info;
       close(FILE);
       return 'ok';
   }
   
   sub tokenwrapper {
       my $uri=shift;
       $uri=~s|^http\://([^/]+)||;
       $uri=~s|^/||;
       $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
       my $token=$1;
       my (undef,$udom,$uname,$file)=split('/',$uri,4);
       if ($udom && $uname && $file) {
    $file=~s|(\?\.*)*$||;
           &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
           return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
                  (($uri=~/\?/)?'&':'?').'token='.$token.
                                  '&tokenissued='.$perlvar{'lonHostID'};
       } else {
           return '/adm/notfound.html';
       }
   }
   
   sub getuploaded {
       my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
       $uri=~s/^\///;
       $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
     my $ua=new LWP::UserAgent;      my $ua=new LWP::UserAgent;
     my $request=new HTTP::Request('GET',&tokenwrapper($file));      my $request=new HTTP::Request($reqtype,$uri);
     my $response=$ua->request($request);      my $response=$ua->request($request);
     if ($response->is_success()) {      $$rtncode = $response->code;
        return $response->content;      if (! $response->is_success()) {
     } else {    return 'failed';
        return -1;       }      
     }      if ($reqtype eq 'HEAD') {
  } else { # normal file from res space   $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
   &repcopy($file);      } elsif ($reqtype eq 'GET') {
   if (! -e $file ) { return -1; };   $$info = $response->content;
   my $fh=Apache::File->new($file);      }
   my $a='';      return 'ok';
   while (<$fh>) { $a .=$_; }  }
   return $a;  
  }  sub readfile {
       my $file = shift;
       if ( (! -e $file ) || ($file eq '') ) { return -1; };
       my $fh;
       open($fh,"<$file");
       my $a='';
       while (<$fh>) { $a .=$_; }
       return $a;
 }  }
   
 sub filelocation {  sub filelocation {
   my ($dir,$file) = @_;      my ($dir,$file) = @_;
   my $location;      my $location;
   $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces      $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
   if ($file=~m:^/~:) { # is a contruction space reference      if ($file=~m:^/~:) { # is a contruction space reference
     $location = $file;          $location = $file;
     $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;          $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
   } elsif ($file=~/^\/*uploaded/) { # is an uploaded file      } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
     $location=$file;          my ($udom,$uname,$filename)=
   } else {       ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
     $file=~s/^$perlvar{'lonDocRoot'}//;          my $home=&homeserver($uname,$udom);
     $file=~s:^/*res::;          my $is_me=0;
     if ( !( $file =~ m:^/:) ) {          my @ids=&current_machine_ids();
       $location = $dir. '/'.$file;          foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
           if ($is_me) {
        $location=&Apache::loncommon::propath($udom,$uname).
          '/userfiles/'.$filename;
           } else {
      $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
          $udom.'/'.$uname.'/'.$filename;
           }
     } else {      } else {
       $location = '/home/httpd/html/res'.$file;          $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
           $file=~s:^/res/:/:;
           if ( !( $file =~ m:^/:) ) {
               $location = $dir. '/'.$file;
           } else {
               $location = '/home/httpd/html/res'.$file;
           }
     }      }
   }      $location=~s://+:/:g; # remove duplicate /
   $location=~s://+:/:g; # remove duplicate /      while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
   while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..      while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
   return $location;      return $location;
 }  }
   
 sub hreflocation {  sub hreflocation {
     my ($dir,$file)=@_;      my ($dir,$file)=@_;
     unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {      unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
        my $finalpath=filelocation($dir,$file);   my $finalpath=filelocation($dir,$file);
        $finalpath=~s/^\/home\/httpd\/html//;   $finalpath=~s-^/home/httpd/html--;
        $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;   $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
        return $finalpath;   return $finalpath;
     } else {      } elsif ($file=~m-^/home-) {
        return $file;   $file=~s-^/home/httpd/html--;
    $file=~s-^/home/(\w+)/public_html/-/~$1/-;
    return $file;
       }
       return $file;
   }
   
   sub current_machine_domains {
       my $hostname=$hostname{$perlvar{'lonHostID'}};
       my @domains;
       while( my($id, $name) = each(%hostname)) {
   # &logthis("-$id-$name-$hostname-");
    if ($hostname eq $name) {
       push(@domains,$hostdom{$id});
    }
       }
       return @domains;
   }
   
   sub current_machine_ids {
       my $hostname=$hostname{$perlvar{'lonHostID'}};
       my @ids;
       while( my($id, $name) = each(%hostname)) {
   # &logthis("-$id-$name-$hostname-");
    if ($hostname eq $name) {
       push(@ids,$id);
    }
     }      }
       return @ids;
 }  }
   
 # ------------------------------------------------------------- Declutters URLs  # ------------------------------------------------------------- Declutters URLs
   
 sub declutter {  sub declutter {
     my $thisfn=shift;      my $thisfn=shift;
     $thisfn=~s/^$perlvar{'lonDocRoot'}//;      if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
       $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
     $thisfn=~s/^\///;      $thisfn=~s/^\///;
     $thisfn=~s/^res\///;      $thisfn=~s/^res\///;
     $thisfn=~s/\?.+$//;      $thisfn=~s/\?.+$//;
Line 4027  sub declutter { Line 5457  sub declutter {
   
 sub clutter {  sub clutter {
     my $thisfn='/'.&declutter(shift);      my $thisfn='/'.&declutter(shift);
     unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {       unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) { 
        $thisfn='/res'.$thisfn;          $thisfn='/res'.$thisfn; 
     }      }
     return $thisfn;      return $thisfn;
 }  }
   
   sub freeze_escape {
       my ($value)=@_;
       if (ref($value)) {
    $value=&nfreeze($value);
    return '__FROZEN__'.&escape($value);
       }
       return &escape($value);
   }
   
 # -------------------------------------------------------- Escape Special Chars  # -------------------------------------------------------- Escape Special Chars
   
 sub escape {  sub escape {
Line 4049  sub unescape { Line 5488  sub unescape {
     return $str;      return $str;
 }  }
   
   sub thaw_unescape {
       my ($value)=@_;
       if ($value =~ /^__FROZEN__/) {
    substr($value,0,10,undef);
    $value=&unescape($value);
    return &thaw($value);
       }
       return &unescape($value);
   }
   
   sub mod_perl_version {
       return 1;
       if (defined($perlvar{'MODPERL2'})) {
    return 2;
       }
   }
   
   sub correct_line_ends {
       my ($result)=@_;
       $$result =~s/\r\n/\n/mg;
       $$result =~s/\r/\n/mg;
   }
 # ================================================================ Main Program  # ================================================================ Main Program
   
 sub goodbye {  sub goodbye {
    &logthis("Starting Shut down");     &logthis("Starting Shut down");
   #not converted to using infrastruture and probably shouldn't be
      &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
   #converted
   #   &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
      &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
   #   &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
   #   &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
   #1.1 only
   #   &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
   #   &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
   #   &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
   #   &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
      &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
      &logthis(sprintf("%-20s is %s",'kicks',$kicks));
      &logthis(sprintf("%-20s is %s",'hits',$hits));
    &flushcourselogs();     &flushcourselogs();
    &logthis("Shutting down");     &logthis("Shutting down");
    return DONE;     return DONE;
Line 4062  BEGIN { Line 5538  BEGIN {
 # ----------------------------------- Read loncapa.conf and loncapa_apache.conf  # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
     unless ($readit) {      unless ($readit) {
 {  {
     my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");      # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
       open(my $config,"</etc/httpd/conf/loncapa.conf");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
         if ($configline =~ /^[^\#]*PerlSetVar/) {          if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
    my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);     my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
            chomp($varvalue);             chomp($varvalue);
            $perlvar{$varname}=$varvalue;             $perlvar{$varname}=$varvalue;
         }          }
     }      }
       close($config);
 }  }
 {  {
     my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");      open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
         if ($configline =~ /^[^\#]*PerlSetVar/) {          if ($configline =~ /^[^\#]*PerlSetVar/) {
Line 4082  BEGIN { Line 5560  BEGIN {
            $perlvar{$varname}=$varvalue;             $perlvar{$varname}=$varvalue;
         }          }
     }      }
       close($config);
 }  }
   
 # ------------------------------------------------------------ Read domain file  # ------------------------------------------------------------ Read domain file
 {  {
     my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.  
                             '/domain.tab');  
     %domaindescription = ();      %domaindescription = ();
     %domain_auth_def = ();      %domain_auth_def = ();
     %domain_auth_arg_def = ();      %domain_auth_arg_def = ();
     if ($fh) {      my $fh;
       if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
        while (<$fh>) {         while (<$fh>) {
            next if /^\#/;             next if (/^(\#|\s*$)/);
   #           next if /^\#/;
            chomp;             chomp;
            my ($domain, $domain_description, $def_auth, $def_auth_arg)             my ($domain, $domain_description, $def_auth, $def_auth_arg,
                = split(/:/,$_,4);         $def_lang, $city, $longi, $lati) = split(/:/,$_);
            $domain_auth_def{$domain}=$def_auth;     $domain_auth_def{$domain}=$def_auth;
            $domain_auth_arg_def{$domain}=$def_auth_arg;             $domain_auth_arg_def{$domain}=$def_auth_arg;
            $domaindescription{$domain}=$domain_description;     $domaindescription{$domain}=$domain_description;
 #          &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");     $domain_lang_def{$domain}=$def_lang;
      $domain_city{$domain}=$city;
      $domain_longi{$domain}=$longi;
      $domain_lati{$domain}=$lati;
   
    #         &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
 #          &logthis("Domain.tab: $domain ".$domaindescription{$domain} );  #          &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
        }   }
     }      }
       close ($fh);
 }  }
   
   
 # ------------------------------------------------------------- Read hosts file  # ------------------------------------------------------------- Read hosts file
 {  {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");      open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
        next if ($configline =~ /^(\#|\s*$)/);         next if ($configline =~ /^(\#|\s*$)/);
        chomp($configline);         chomp($configline);
        my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);         my ($id,$domain,$role,$name)=split(/:/,$configline);
        if ($id && $domain && $role && $name && $ip) {         $name=~s/\s//g;
          if ($id && $domain && $role && $name) {
  $hostname{$id}=$name;   $hostname{$id}=$name;
  $hostdom{$id}=$domain;   $hostdom{$id}=$domain;
  $hostip{$id}=$ip;  
  $iphost{$ip}=$id;  
  if ($role eq 'library') { $libserv{$id}=$name; }   if ($role eq 'library') { $libserv{$id}=$name; }
        } else {  
  if ($configline) {  
    &logthis("Skipping hosts.tab line -$configline-");  
  }  
        }         }
     }      }
       close($config);
   }
   
   sub get_iphost {
       if (%iphost) { return %iphost; }
       foreach my $id (keys(%hostname)) {
    my $name=$hostname{$id};
    my $ip = gethostbyname($name);
    if (!$ip || length($ip) ne 4) {
       &logthis("Skipping host $id name $name no IP found\n");
       next;
    }
    $ip=inet_ntoa($ip);
    push(@{$iphost{$ip}},$id);
       }
       return %iphost;
 }  }
   
 # ------------------------------------------------------ Read spare server file  # ------------------------------------------------------ Read spare server file
 {  {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");      open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
        chomp($configline);         chomp($configline);
Line 4139  BEGIN { Line 5635  BEGIN {
           $spareid{$configline}=1;            $spareid{$configline}=1;
        }         }
     }      }
       close($config);
 }  }
 # ------------------------------------------------------------ Read permissions  # ------------------------------------------------------------ Read permissions
 {  {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");      open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
        chomp($configline);   chomp($configline);
       if ($configline) {   if ($configline) {
        my ($role,$perm)=split(/ /,$configline);      my ($role,$perm)=split(/ /,$configline);
        if ($perm ne '') { $pr{$role}=$perm; }      if ($perm ne '') { $pr{$role}=$perm; }
       }   }
     }      }
       close($config);
 }  }
   
 # -------------------------------------------- Read plain texts for permissions  # -------------------------------------------- Read plain texts for permissions
 {  {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");      open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
        chomp($configline);   chomp($configline);
       if ($configline) {   if ($configline) {
        my ($short,$plain)=split(/:/,$configline);      my ($short,$plain)=split(/:/,$configline);
        if ($plain ne '') { $prp{$short}=$plain; }      if ($plain ne '') { $prp{$short}=$plain; }
       }   }
     }      }
       close($config);
 }  }
   
 # ---------------------------------------------------------- Read package table  # ---------------------------------------------------------- Read package table
 {  {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");      open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
   
     while (my $configline=<$config>) {      while (my $configline=<$config>) {
        chomp($configline);   if ($configline !~ /\S/ || $configline=~/^#/) { next; }
        my ($short,$plain)=split(/:/,$configline);   chomp($configline);
        my ($pack,$name)=split(/\&/,$short);   my ($short,$plain)=split(/:/,$configline);
        if ($plain ne '') {   my ($pack,$name)=split(/\&/,$short);
           $packagetab{$pack.'&'.$name.'&name'}=$name;    if ($plain ne '') {
           $packagetab{$short}=$plain;       $packagetab{$pack.'&'.$name.'&name'}=$name; 
        }      $packagetab{$short}=$plain; 
    }
     }      }
       close($config);
 }  }
   
 # ------------- set up temporary directory  # ------------- set up temporary directory
Line 4187  BEGIN { Line 5688  BEGIN {
   
 }  }
   
 %metacache=();  $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
   
 $processmarker='_'.time.'_'.$perlvar{'lonHostID'};  $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
 $dumpcount=0;  $dumpcount=0;
Line 4195  $dumpcount=0; Line 5696  $dumpcount=0;
 &logtouch();  &logtouch();
 &logthis('<font color=yellow>INFO: Read configuration</font>');  &logthis('<font color=yellow>INFO: Read configuration</font>');
 $readit=1;  $readit=1;
       {
    use integer;
    my $test=(2**32)+1;
    if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
    &logthis(" Detected 64bit platform ($_64bit)");
       }
 }  }
 }  }
   
Line 4236  being set. Line 5743  being set.
   
 =back  =back
   
 =head1 INTRODUCTION  =head1 OVERVIEW
   
 This module provides subroutines which interact with the  lonnet provides subroutines which interact with the
 lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about   lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
 - classes  about classes, users, and resources.
 - users   
 - resources  
   
 For many of these objects you can also use this to store data about  For many of these objects you can also use this to store data about
 them or modify them in various ways.  them or modify them in various ways.
   
 This is part of the LearningOnline Network with CAPA project  =head2 Symbs
 described at http://www.lon-capa.org.  
   
 =head1 RETURN MESSAGES  To identify a specific instance of a resource, LON-CAPA uses symbols
   or "symbs"X<symb>. These identifiers are built from the URL of the
   map, the resource number of the resource in the map, and the URL of
   the resource itself. The latter is somewhat redundant, but might help
   if maps change.
   
 =over 4  An example is
   
 =item *   msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
   
 con_lost : unable to contact remote host  The respective map entry is
   
 =item *   <resource id="19" src="/res/msu/korte/tests/part12.problem"
     title="Problem 2">
    </resource>
   
 con_delayed : unable to contact remote host, message will be delivered  Symbs are used by the random number generator, as well as to store and
 when the connection is brought back up  restore data specific to a certain instance of for example a problem.
   
 =item *  =head2 Storing And Retrieving Data
   
 con_failed : unable to contact remote host and unable to save message  X<store()>X<cstore()>X<restore()>Three of the most important functions
 for later delivery  in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
   C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
   is is the non-critical message twin of cstore. These functions are for
   handlers to store a perl hash to a user's permanent data space in an
   easy manner, and to retrieve it again on another call. It is expected
   that a handler would use this once at the beginning to retrieve data,
   and then again once at the end to send only the new data back.
   
 =item *  The data is stored in the user's data directory on the user's
   homeserver under the ID of the course.
   
 error: : an error a occured, a description of the error follows the :  The hash that is returned by restore will have all of the previous
   value for all of the elements of the hash.
   
 =item *  Example:
   
    #creating a hash
    my %hash;
    $hash{'foo'}='bar';
   
    #storing it
    &Apache::lonnet::cstore(\%hash);
   
    #changing a value
    $hash{'foo'}='notbar';
   
    #adding a new value
    $hash{'bar'}='foo';
    &Apache::lonnet::cstore(\%hash);
   
    #retrieving the hash
    my %history=&Apache::lonnet::restore();
   
    #print the hash
    foreach my $key (sort(keys(%history))) {
      print("\%history{$key} = $history{$key}");
    }
   
   Will print out:
   
    %history{1:foo} = bar
    %history{1:keys} = foo:timestamp
    %history{1:timestamp} = 990455579
    %history{2:bar} = foo
    %history{2:foo} = notbar
    %history{2:keys} = foo:bar:timestamp
    %history{2:timestamp} = 990455580
    %history{bar} = foo
    %history{foo} = notbar
    %history{timestamp} = 990455580
    %history{version} = 2
   
   Note that the special hash entries C<keys>, C<version> and
   C<timestamp> were added to the hash. C<version> will be equal to the
   total number of versions of the data that have been stored. The
   C<timestamp> attribute will be the UNIX time the hash was
   stored. C<keys> is available in every historical section to list which
   keys were added or changed at a specific historical revision of a
   hash.
   
   B<Warning>: do not store the hash that restore returns directly. This
   will cause a mess since it will restore the historical keys as if the
   were new keys. I.E. 1:foo will become 1:1:foo etc.
   
 no_such_host : unable to fund a host associated with the user/domain  Calling convention:
   
    my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
    &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
   
   For more detailed information, see lonnet specific documentation.
   
   =head1 RETURN MESSAGES
   
   =over 4
   
   =item * B<con_lost>: unable to contact remote host
   
   =item * B<con_delayed>: unable to contact remote host, message will be delivered
   when the connection is brought back up
   
   =item * B<con_failed>: unable to contact remote host and unable to save message
   for later delivery
   
   =item * B<error:>: an error a occured, a description of the error follows the :
   
   =item * B<no_such_host>: unable to fund a host associated with the user/domain
 that was requested  that was requested
   
 =back  =back
Line 4285  that was requested Line 5872  that was requested
   
 =over 4  =over 4
   
 =item *  =item * 
   X<appenv()>
 appenv(%hash) : the value of %hash is written to the user envirnoment  B<appenv(%hash)>: the value of %hash is written to
 file, and will be restored for each access this user makes during this  the user envirnoment file, and will be restored for each access this
 session, also modifies the %ENV for the current process  user makes during this session, also modifies the %ENV for the current
   process
   
 =item *  =item *
   X<delenv()>
 delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.  B<delenv($regexp)>: removes all items from the session
   environment file that matches the regular expression in $regexp. The
   values are also delted from the current processes %ENV.
   
 =back  =back
   
Line 4302  delenv($regexp) : removes all items from Line 5892  delenv($regexp) : removes all items from
 =over 4  =over 4
   
 =item *  =item *
   X<queryauthenticate()>
 queryauthenticate($uname,$udom) : try to determine user's current  B<queryauthenticate($uname,$udom)>: try to determine user's current 
 authentication scheme  authentication scheme
   
 =item *  =item *
   X<authenticate()>
 authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib  B<authenticate($uname,$upass,$udom)>: try to
 servers (first use the current one), $upass should be the users password  authenticate user from domain's lib servers (first use the current
   one). C<$upass> should be the users password.
   
 =item *  =item *
   X<homeserver()>
 homeserver($uname,$udom) : find the server which has the user's  B<homeserver($uname,$udom)>: find the server which has
 directory and files (there must be only one), this caches the answer,  the user's directory and files (there must be only one), this caches
 and also caches if there is a borken connection.  the answer, and also caches if there is a borken connection.
   
 =item *  =item *
   X<idget()>
 idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a  B<idget($udom,@ids)>: find the usernames behind a list of IDs
 unique resource in a domain, there must be only 1 ID per username, and  (IDs are a unique resource in a domain, there must be only 1 ID per
 only 1 username per ID in a specific domain) (returns hash:  username, and only 1 username per ID in a specific domain) (returns
 id=>name,id=>name)  hash: id=>name,id=>name)
   
 =item *  =item *
   X<idrget()>
 idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:  B<idrget($udom,@unames)>: find the IDs behind a list of
 name=>id,name=>id)  usernames (returns hash: name=>id,name=>id)
   
 =item *  =item *
   X<idput()>
 idput($udom,%ids) : store away a list of names and associated IDs  B<idput($udom,%ids)>: store away a list of names and associated IDs
   
 =item *  =item *
   X<rolesinit()>
 rolesinit($udom,$username,$authhost) : get user privileges  B<rolesinit($udom,$username,$authhost)>: get user privileges
   
 =item *  =item *
   X<getsection()>
 usection($udom,$uname,$cname) : finds the section of student in the  B<getsection($udom,$uname,$cname)>: finds the section of student in the
 course $cname, return section name/number or '' for "not in course"  course $cname, return section name/number or '' for "not in course"
 and '-1' for "no section"  and '-1' for "no section"
   
 =item *  =item *
   X<userenvironment()>
 userenvironment($udom,$uname,@what) : gets the values of the keys  B<userenvironment($udom,$uname,@what)>: gets the values of the keys
 passed in @what from the requested user's environment, returns a hash  passed in @what from the requested user's environment, returns a hash
   
 =back  =back
Line 4542  subscribe($fname) : subscribe to a resou Line 6133  subscribe($fname) : subscribe to a resou
   
 repcopy($filename) : subscribes to the requested file, and attempts to  repcopy($filename) : subscribes to the requested file, and attempts to
 replicate from the owning library server, Might return  replicate from the owning library server, Might return
 HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or  'unavailable', 'not_found', 'forbidden', 'ok', or
 HTTP_BAD_REQUEST, also attempts to grab the metadata for the  'bad_request', also attempts to grab the metadata for the
 resource. Expects the local filesystem pathname  resource. Expects the local filesystem pathname
 (/home/httpd/html/res/....)  (/home/httpd/html/res/....)
   
Line 4597  returns the data handle Line 6188  returns the data handle
 =item *  =item *
   
 symbverify($symb,$thisfn) : verifies that $symb actually exists and is  symbverify($symb,$thisfn) : verifies that $symb actually exists and is
 a possible symb for the URL in $thisfn, returns a 1 on success, 0 on  a possible symb for the URL in $thisfn, and if is an encryypted
 failure, user must be in a course, as it assumes the existance of the  resource that the user accessed using /enc/ returns a 1 on success, 0
 course initi hash, and uses $ENV('request.course.id'}  on failure, user must be in a course, as it assumes the existance of
   the course initial hash, and uses $ENV('request.course.id'}
   
   
 =item *  =item *
Line 4713  dumps the complete (or key matching rege Line 6305  dumps the complete (or key matching rege
   
 =item *  =item *
   
   inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
   $store can be a scalar, an array reference, or if the amount to be 
   incremented is > 1, a hash reference.
   
   ($udom and $uname are optional)
   
   =item *
   
 put($namespace,$storehash,$udom,$uname) : stores hash in namesp  put($namespace,$storehash,$udom,$uname) : stores hash in namesp
 ($udom and $uname are optional)  ($udom and $uname are optional)
   
 =item *  =item *
   
   putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
   keys used in storehash include version information (e.g., 1:$symb:message etc.) as
   used in records written by &store and retrieved by &restore.  This function 
   was created for use in editing discussion posts, without incrementing the
   version number included in the key for a particular post. The colon 
   separated list of attribute names (e.g., the value associated with the key 
   1:keys:$symb) is also generated and passed in the ampersand separated 
   items sent to lonnet::reply().  
   
   =item *
   
 cput($namespace,$storehash,$udom,$uname) : critical put  cput($namespace,$storehash,$udom,$uname) : critical put
 ($udom and $uname are optional)  ($udom and $uname are optional)
   
Line 4823  messages of critical importance should g Line 6434  messages of critical importance should g
   
 =item *  =item *
   
 getfile($file) : returns the entire contents of a file or -1; it  getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
 properly subscribes to and replicates the file if neccessary.  (a) files in /uploaded
     (i) If a local copy of the file exists - 
         compares modification date of local copy with last-modified date for 
         definitive version stored on home server for course. If local copy is 
         stale, requests a new version from the home server and stores it. 
         If the original has been removed from the home server, then local copy 
         is unlinked.
     (ii) If local copy does not exist -
         requests the file from the home server and stores it. 
     
     If $caller is 'uploadrep':  
       This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
       for request for files originally uploaded via DOCS. 
        - returns 'ok' if fresh local copy now available, -1 otherwise.
     
     Otherwise:
        This indicates a call from the content generation phase of the request.
        -  returns the entire contents of the file or -1.
        
   (b) files in /res
      - returns the entire contents of a file or -1; 
      it properly subscribes to and replicates the file if neccessary.
   
 =item *  =item *
   
Line 4844  declutter() : declutters URLs (remove do Line 6476  declutter() : declutters URLs (remove do
   
 =back  =back
   
   =head2 Usererfile file routines (/uploaded*)
   
   =over 4
   
   =item *
   
   userfileupload(): main rotine for putting a file in a user or course's
                     filespace, arguments are,
   
    formname - required - this is the name of the element in $ENV where the
              filename, and the contents of the file to create/modifed exist
              the filename is in $ENV{'form.'.$formname.'.filename'} and the
              contents of the file is located in $ENV{'form.'.$formname}
    coursedoc - if true, store the file in the course of the active role
                of the current user
    subdir - required - subdirectory to put the file in under ../userfiles/
            if undefined, it will be placed in "unknown"
   
    (This routine calls clean_filename() to remove any dangerous
    characters from the filename, and then calls finuserfileupload() to
    complete the transaction)
   
    returns either the url of the uploaded file (/uploaded/....) if successful
    and /adm/notfound.html if unsuccessful
   
   =item *
   
   clean_filename(): routine for cleaing a filename up for storage in
                    userfile space, argument is:
   
    filename - proposed filename
   
   returns: the new clean filename
   
   =item *
   
   finishuserfileupload(): routine that creaes and sends the file to
   userspace, probably shouldn't be called directly
   
     docuname: username or courseid of destination for the file
     docudom: domain of user/course of destination for the file
     docuhome: loncapa id of the library server that is getting the file
     formname: same as for userfileupload()
     fname: filename (inculding subdirectories) for the file
   
    returns either the url of the uploaded file (/uploaded/....) if successful
    and /adm/notfound.html if unsuccessful
   
   =item *
   
   renameuserfile(): renames an existing userfile to a new name
   
     Args:
      docuname: username or courseid of destination for the file
      docudom: domain of user/course of destination for the file
      old: current file name (including any subdirs under userfiles)
      new: desired file name (including any subdirs under userfiles)
   
   =item *
   
   mkdiruserfile(): creates a directory is a userfiles dir
   
     Args:
      docuname: username or courseid of destination for the file
      docudom: domain of user/course of destination for the file
      dir: dir to create (including any subdirs under userfiles)
   
   =item *
   
   removeuserfile(): removes a file that exists in userfiles
   
     Args:
      docuname: username or courseid of destination for the file
      docudom: domain of user/course of destination for the file
      fname: filname to delete (including any subdirs under userfiles)
   
   =item *
   
   removeuploadedurl(): convience function for removeuserfile()
   
     Args:
      url:  a full /uploaded/... url to delete
   
   =back
   
 =head2 HTTP Helper Routines  =head2 HTTP Helper Routines
   
 =over 4  =over 4
Removed from v.1.386  
changed lines
  Added in v.1.610

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