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Diff for /loncom/lonnet/perl/lonnet.pm between versions 1.346 and 1.522

version 1.346, 2003/03/23 01:46:51 version 1.522, 2004/07/16 17:56:01
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 %homecache %badServerCache %hostip %iphost %spareid %hostdom 
    %libserv %pr %prp %metacache %packagetab %titlecache      %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
    %courselogs %accesshash $processmarker $dumpcount      %courselogs %accesshash %userrolehash $processmarker $dumpcount 
    %coursedombuf %coursehombuf %courseresdatacache      %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseresdatacache 
    %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);     %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def 
      %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
   
 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::loncoursedata;
   use Apache::lonlocal;
   use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
   use Time::HiRes();
 my $readit;  my $readit;
   
   =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 93  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 105  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 166  sub reconlonc { Line 160  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 => $loncpid) {
Line 214  sub critical { Line 208  sub critical {
       "$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 244  sub critical { Line 240  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
   
   sub transfer_profile_to_env {
       my ($lonidsdir,$handle)=@_;
       my @profile;
       {
    open(my $idf,"$lonidsdir/$handle.id");
    flock($idf,LOCK_SH);
    @profile=<$idf>;
    close($idf);
       }
       my $envi;
       my %Remove;
       for ($envi=0;$envi<=$#profile;$envi++) {
    chomp($profile[$envi]);
    my ($envname,$envvalue)=split(/=/,$profile[$envi]);
    $ENV{$envname} = $envvalue;
           if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
               if ($time < time-300) {
                   $Remove{$key}++;
               }
           }
       }
       $ENV{'user.environment'} = "$lonidsdir/$handle.id";
       foreach my $expired_key (keys(%Remove)) {
           &delenv($expired_key);
       }
   }
   
 # ---------------------------------------------------------- Append Environment  # ---------------------------------------------------------- Append Environment
   
 sub appenv {  sub appenv {
Line 260  sub appenv { Line 299  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 315  sub delenv { Line 354  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';
 }  }
   
   # ------------------------------------------ Find out current server userload
   # there is a copy in lond
   sub userload {
       my $numusers=0;
       {
    opendir(LONIDS,$perlvar{'lonIDsDir'});
    my $filename;
    my $curtime=time;
    while ($filename=readdir(LONIDS)) {
       if ($filename eq '.' || $filename eq '..') {next;}
       my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
       if ($curtime-$mtime < 1800) { $numusers++; }
    }
    closedir(LONIDS);
       }
       my $userloadpercent=0;
       my $maxuserload=$perlvar{'lonUserLoadLim'};
       if ($maxuserload) {
    $userloadpercent=100*$numusers/$maxuserload;
       }
       $userloadpercent=sprintf("%.2f",$userloadpercent);
       return $userloadpercent;
   }
   
 # ------------------------------------------ Fight off request when overloaded  # ------------------------------------------ Fight off request when overloaded
   
 sub overloaderror {  sub overloaderror {
Line 354  sub overloaderror { Line 422  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 365  sub overloaderror { Line 434  sub overloaderror {
     if ($overload>0) {      if ($overload>0) {
  $r->err_headers_out->{'Retry-After'}=$overload;   $r->err_headers_out->{'Retry-After'}=$overload;
         $r->log_error('Overload of '.$overload.' on '.$checkserver);          $r->log_error('Overload of '.$overload.' on '.$checkserver);
         return 413;          return 409;
     }          }    
     return '';      return '';
 }  }
Line 373  sub overloaderror { Line 442  sub overloaderror {
 # ------------------------------ Find server with least workload from spare.tab  # ------------------------------ Find server with least workload from spare.tab
   
 sub spareserver {  sub spareserver {
     my $loadpercent = shift;      my ($loadpercent,$userloadpercent) = @_;
     my $tryserver;      my $tryserver;
     my $spareserver='';      my $spareserver='';
     my $lowestserver=$loadpercent;       if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
       my $lowestserver=$loadpercent > $userloadpercent?
                $loadpercent :  $userloadpercent;
     foreach $tryserver (keys %spareid) {      foreach $tryserver (keys %spareid) {
        my $answer=reply('load',$tryserver);   my $loadans=reply('load',$tryserver);
        if (($answer =~ /\d/) && ($answer<$lowestserver)) {   my $userloadans=reply('userload',$tryserver);
    $spareserver="http://$hostname{$tryserver}";   if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
            $lowestserver=$answer;      next; #didn't get a number from the server
        }   }
     }       my $answer;
    if ($loadans =~ /\d/) {
       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 426  sub changepass { Line 513  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 466  sub authenticate { Line 531  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';
 }  }
   
Line 506  sub authenticate { Line 554  sub authenticate {
 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{$index}";       my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
     }      if (defined($cached)) { return $result; }
     my $tryserver;      my $tryserver;
     foreach $tryserver (keys %libserv) {      foreach $tryserver (keys %libserv) {
         next if ($ignoreBadCache ne 'true' &&           next if ($ignoreBadCache ne 'true' && 
Line 516  sub homeserver { Line 564  sub homeserver {
  if ($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}=$tryserver;         return &do_cache(\%homecache,$index,$tryserver,'home');
               return $tryserver;   
            } elsif ($answer eq 'no_host') {             } elsif ($answer eq 'no_host') {
        $badServerCache{$tryserver}=1;         $badServerCache{$tryserver}=1;
            }             }
Line 570  sub idput { Line 617  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 580  sub idput { Line 628  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 591  sub idput { Line 638  sub idput {
 # --------------------------------------------------- Assign a key to a student  # --------------------------------------------------- Assign a key to a student
   
 sub assign_access_key {  sub assign_access_key {
     my ($ckey,$cdom,$cnum,$udom,$uname)=@_;  #
   # a valid key looks like uname:udom#comments
   # comments are being appended
   #
       my ($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{$ckey}=~/^\d+$/) || # has time - new key      if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
         ($existing{$ckey} eq $udom.':'.$uname)) { # this should not happen,          ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) { 
                                                     # assigned to this person
                                                     # - this should not happen,
                                                   # unless something went wrong                                                    # unless something went wrong
                                                   # the first time around                                                    # the first time around
 # ready to assign  # ready to assign
     } elsif (!$existing{$ckey}) {          $logentry=$1.'; '.$logentry;
         if (&put('accesskey',{$ckey=>$udom.':'.$uname},$cdom,$cnum) eq 'ok') {          if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
                                                    $kdom,$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 => $ckey}) eq 'ok') {
Line 618  sub assign_access_key { Line 676  sub assign_access_key {
         } else {          } else {
             return 'error: Could not assign key, try again later.';              return 'error: Could not assign key, try again later.';
         }          }
       } elsif (!$existing{$ckey}) {
 # the key does not exist  # the key does not exist
  return 'error: The key does not exist';   return 'error: The key does not exist';
     } else {      } else {
Line 626  sub assign_access_key { Line 685  sub assign_access_key {
     }      }
 }  }
   
   # ------------------------------------------ put an additional comment on a key
   
   sub comment_access_key {
   #
   # a valid key looks like uname:udom#comments
   # comments are being appended
   #
       my ($ckey,$cdom,$cnum,$logentry)=@_;
       $cdom=
      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
       $cnum=
      $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
       my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
       if ($existing{$ckey}) {
           $existing{$ckey}.='; '.$logentry;
   # ready to assign
           if (&put('accesskeys',{$ckey=>$existing{$ckey}},
                                                    $cdom,$cnum) eq 'ok') {
       return 'ok';
           } else {
       return 'error: Count not store comment.';
           }
       } else {
   # the key does not exist
    return 'error: The key does not exist';
       }
   }
   
 # ------------------------------------------------------ Generate a set of keys  # ------------------------------------------------------ Generate a set of keys
   
 sub generate_access_keys {  sub generate_access_keys {
     my ($number,$cdom,$cnum)=@_;      my ($number,$cdom,$cnum,$logentry)=@_;
     $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($cnum));
     unless (&allowed('ccc',$cdom)) { return 0; }      unless (&allowed('mky',$cdom)) { return 0; }
     unless (($cdom) && ($cnum)) { return 0; }      unless (($cdom) && ($cnum)) { return 0; }
     if ($number>10000) { return 0; }      if ($number>10000) { return 0; }
     sleep(2); # make sure don't get same seed twice      sleep(2); # make sure don't get same seed twice
Line 650  sub generate_access_keys { Line 737  sub generate_access_keys {
        if ($existing{$newkey}) {         if ($existing{$newkey}) {
            $i--;             $i--;
        } else {         } else {
   if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {    if (&put('accesskeys',
                 { $newkey => '# generated '.localtime().
                              ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
                              '; '.$logentry },
      $cdom,$cnum) eq 'ok') {
               $total++;                $total++;
   }    }
        }         }
Line 668  sub validate_access_key { Line 759  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} eq $udom.':'.$uname);      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
Line 699  sub getsection { Line 790  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));
Line 729  sub getsection { Line 820  sub getsection {
     return '-1';      return '-1';
 }  }
   
   
   my $disk_caching_disabled=1;
   
   sub devalidate_cache {
       my ($cache,$id,$name) = @_;
       delete $$cache{$id.'.time'};
       delete $$cache{$id};
       if ($disk_caching_disabled) { return; }
       my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
       open(DB,"$filename.lock");
       flock(DB,LOCK_EX);
       my %hash;
       if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
    eval <<'EVALBLOCK';
       delete($hash{$id});
       delete($hash{$id.'.time'});
   EVALBLOCK
           if ($@) {
       &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
       unlink($filename);
    }
       } else {
    if (-e $filename) {
       &logthis("Unable to tie hash (devalidate cache): $name");
       unlink($filename);
    }
       }
       untie(%hash);
       flock(DB,LOCK_UN);
       close(DB);
   }
   
   sub is_cached {
       my ($cache,$id,$name,$time) = @_;
       if (!$time) { $time=300; }
       if (!exists($$cache{$id.'.time'})) {
    &load_cache_item($cache,$name,$id);
       }
       if (!exists($$cache{$id.'.time'})) {
   # &logthis("Didn't find $id");
    return (undef,undef);
       } else {
    if (time-($$cache{$id.'.time'})>$time) {
   #    &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
       &devalidate_cache($cache,$id,$name);
       return (undef,undef);
    }
       }
       return ($$cache{$id},1);
   }
   
   sub do_cache {
       my ($cache,$id,$value,$name) = @_;
       $$cache{$id.'.time'}=time;
       $$cache{$id}=$value;
   #    &logthis("Caching $id as :$value:");
       &save_cache_item($cache,$name,$id);
       # do_cache implictly return the set value
       $$cache{$id};
   }
   
   sub save_cache_item {
       my ($cache,$name,$id)=@_;
       if ($disk_caching_disabled) { return; }
       my $starttime=&Time::HiRes::time();
   #    &logthis("Saving :$name:$id");
       my %hash;
       my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
       open(DB,"$filename.lock");
       flock(DB,LOCK_EX);
       if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
    eval <<'EVALBLOCK';
       $hash{$id.'.time'}=$$cache{$id.'.time'};
       $hash{$id}=freeze({'item'=>$$cache{$id}});
   EVALBLOCK
           if ($@) {
       &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
       unlink($filename);
    }
       } else {
    if (-e $filename) {
       &logthis("Unable to tie hash (save cache item): $name ($!)");
       unlink($filename);
    }
       }
       untie(%hash);
       flock(DB,LOCK_UN);
       close(DB);
   #    &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
   }
   
   sub load_cache_item {
       my ($cache,$name,$id)=@_;
       if ($disk_caching_disabled) { return; }
       my $starttime=&Time::HiRes::time();
   #    &logthis("Before Loading $name  for $id size is ".scalar(%$cache));
       my %hash;
       my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
       open(DB,"$filename.lock");
       flock(DB,LOCK_SH);
       if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
    eval <<'EVALBLOCK';
       if (!%$cache) {
    my $count;
    while (my ($key,$value)=each(%hash)) { 
       $count++;
       if ($key =~ /\.time$/) {
    $$cache{$key}=$value;
       } else {
    my $hashref=thaw($value);
    $$cache{$key}=$hashref->{'item'};
       }
    }
   #    &logthis("Initial load: $count");
       } else {
    my $hashref=thaw($hash{$id});
    $$cache{$id}=$hashref->{'item'};
    $$cache{$id.'.time'}=$hash{$id.'.time'};
       }
   EVALBLOCK
           if ($@) {
       &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
       unlink($filename);
    }        
       } else {
    if (-e $filename) {
       &logthis("Unable to tie hash (load cache item): $name ($!)");
       unlink($filename);
    }
       }
       untie(%hash);
       flock(DB,LOCK_UN);
       close(DB);
   #    &logthis("After Loading $name size is ".scalar(%$cache));
   #    &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
   }
   
 sub usection {  sub usection {
     my ($udom,$unam,$courseid)=@_;      my ($udom,$unam,$courseid)=@_;
       my $hashid="$udom:$unam:$courseid";
       
       my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
       if (defined($cached)) { return $result; }
     $courseid=~s/\_/\//g;      $courseid=~s/\_/\//g;
     $courseid=~s/^(\w)/\/$1/;      $courseid=~s/^(\w)/\/$1/;
     foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',      foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
                         &homeserver($unam,$udom)))) {                          &homeserver($unam,$udom)))) {
         my ($key,$value)=split(/\=/,$_);          my ($key,$value)=split(/\=/,$_);
         $key=&unescape($key);          $key=&unescape($key);
         if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {          if ($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($value));
Line 749  sub usection { Line 981  sub usection {
             if ($end) {              if ($end) {
                 if ($now>$end) { $notactive=1; }                  if ($now>$end) { $notactive=1; }
             }               } 
             unless ($notactive) { return $section; }              unless ($notactive) {
    return &do_cache(\%usectioncache,$hashid,$section,'usection');
       }
         }          }
     }      }
     return '-1';      return &do_cache(\%usectioncache,$hashid,'-1','usection');
 }  }
   
 # ------------------------------------- Read an entry from a user's environment  # ------------------------------------- Read an entry from a user's environment
Line 792  sub getversion { Line 1026  sub getversion {
   
 sub currentversion {  sub currentversion {
     my $fname=shift;      my $fname=shift;
       my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
       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(/\//,$author);
Line 803  sub currentversion { Line 1039  sub currentversion {
     if (($answer eq 'con_lost') || ($answer eq 'rejected')) {      if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
  return -1;   return -1;
     }      }
     return $answer;      return &do_cache(\%resversioncache,$fname,$answer,'resversion');
 }  }
   
 # ----------------------------- Subscribe to a resource, return URL if possible  # ----------------------------- Subscribe to a resource, return URL if possible
Line 838  sub repcopy { Line 1074  sub repcopy {
    &logthis("Subscribe returned $remoteurl: $filename");     &logthis("Subscribe returned $remoteurl: $filename");
            return HTTP_SERVICE_UNAVAILABLE;             return HTTP_SERVICE_UNAVAILABLE;
     } elsif ($remoteurl eq 'not_found') {      } elsif ($remoteurl eq 'not_found') {
    &logthis("Subscribe returned not_found: $filename");     #&logthis("Subscribe returned not_found: $filename");
    return HTTP_NOT_FOUND;     return HTTP_NOT_FOUND;
     } elsif ($remoteurl =~ /^rejected by/) {      } elsif ($remoteurl =~ /^rejected by/) {
    &logthis("Subscribe returned $remoteurl: $filename");     &logthis("Subscribe returned $remoteurl: $filename");
Line 892  sub repcopy { Line 1128  sub repcopy {
   
 # ------------------------------------------------ Get server side include body  # ------------------------------------------------ Get server side include body
 sub ssi_body {  sub ssi_body {
     my $filelink=shift;      my ($filelink,%form)=@_;
     my $output=($filelink=~/^http\:/?&externalssi($filelink):      my $output=($filelink=~/^http\:/?&externalssi($filelink):
                                      &ssi($filelink));                                       &ssi($filelink,%form));
     $output=~s/^.*\<body[^\>]*\>//si;      $output=~s/^.*?\<body[^\>]*\>//si;
     $output=~s/\<\/body\s*\>.*$//si;      $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
     $output=~      $output=~
             s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;              s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
     return $output;      return $output;
Line 933  sub externalssi { Line 1169  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  # --------------- Take an uploaded file and put it into the userfiles directory
 # input: name of form element, coursedoc=1 means this is for the course  # input: name of form element, coursedoc=1 means this is for the course
 # output: url of file in userspace  # output: url of file in userspace
   
 sub userfileupload {  sub userfileupload {
     my ($formname,$coursedoc)=@_;      my ($formname,$coursedoc,$subdir)=@_;
       if (!defined($subdir)) { $subdir='unknown'; }
     my $fname=$ENV{'form.'.$formname.'.filename'};      my $fname=$ENV{'form.'.$formname.'.filename'};
 # Replace Windows backslashes by forward slashes  # Replace Windows backslashes by forward slashes
     $fname=~s/\\/\//g;      $fname=~s/\\/\//g;
Line 973  sub userfileupload { Line 1286  sub userfileupload {
     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 1000  sub finishuserfileupload { Line 1325  sub finishuserfileupload {
     }      }
 # Save the file  # Save the file
     {      {
        my $fh=Apache::File->new('>'.$filepath.'/'.$fname);   #&Apache::lonnet::logthis("Saving to $filepath $file");
          open(my $fh,'>'.$filepath.'/'.$file);
        print $fh $ENV{'form.'.$formname};         print $fh $ENV{'form.'.$formname};
          close($fh);
     }      }
 # Notify homeserver to grep it  # Notify homeserver to grep it
 #  #
           my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
     my $fetchresult=   
  &reply('fetchuserfile:'.$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);
   }
   
 # ------------------------------------------------------------------------- Log  # ------------------------------------------------------------------------- Log
   
 sub log {  sub log {
Line 1027  sub log { Line 1364  sub log {
 }  }
   
 # ------------------------------------------------------------------ Course Log  # ------------------------------------------------------------------ Course Log
   #
   # This routine flushes several buffers of non-mission-critical nature
   #
   
 sub flushcourselogs {  sub flushcourselogs {
     &logthis('Flushing course log buffers');      &logthis('Flushing log buffers');
   #
   # course logs
   # This is a log of all transactions in a course, which can be used
   # for data mining purposes
   #
   # It also collects the courseid database, which lists last transaction
   # times and course titles for all courseids
   #
       my %courseidbuffer=();
     foreach (keys %courselogs) {      foreach (keys %courselogs) {
         my $crsid=$_;          my $crsid=$_;
         if (&reply('log:'.$coursedombuf{$crsid}.':'.          if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
           &escape($courselogs{$crsid}),            &escape($courselogs{$crsid}),
           $coursehombuf{$crsid}) eq 'ok') {            $coursehombuf{$crsid}) eq 'ok') {
     delete $courselogs{$crsid};      delete $courselogs{$crsid};
Line 1043  sub flushcourselogs { Line 1392  sub flushcourselogs {
                         " exceeded maximum size, deleting.</font>");                          " exceeded maximum size, deleting.</font>");
                delete $courselogs{$crsid};                 delete $courselogs{$crsid};
             }              }
         }                  }
           if ($courseidbuffer{$coursehombuf{$crsid}}) {
              $courseidbuffer{$coursehombuf{$crsid}}.='&'.
    &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
                            '='.&escape($courseinstcodebuf{$crsid});
           } else {
              $courseidbuffer{$coursehombuf{$crsid}}=
    &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
                            '='.&escape($courseinstcodebuf{$crsid});
           }    
       }
   #
   # Write course id database (reverse lookup) to homeserver of courses 
   # Is used in pickcourse
   #
       foreach (keys %courseidbuffer) {
           &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
       }
   #
   # File accesses
   # Writes to the dynamic metadata of resources to get hit counts, etc.
   #
       foreach my $entry (keys(%accesshash)) {
           if ($entry =~ /___count$/) {
               my ($dom,$name);
               ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
               if (! defined($dom) || $dom eq '' || 
                   ! defined($name) || $name eq '') {
                   my $cid = $ENV{'request.course.id'};
                   $dom  = $ENV{'request.'.$cid.'.domain'};
                   $name = $ENV{'request.'.$cid.'.num'};
               }
               my $value = $accesshash{$entry};
               my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
               my %temphash=($url => $value);
               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};
               }
           }
     }      }
     &logthis('Flushing access logs');  #
     foreach (keys %accesshash) {  # Roles
   # Reverse lookup of user roles for course faculty/staff and co-authorship
   #
       foreach (keys %userrolehash) {
         my $entry=$_;          my $entry=$_;
         $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;          my ($role,$uname,$udom,$runame,$rudom,$rsec)=
         my %temphash=($entry => $accesshash{$entry});      split(/\:/,$entry);
         if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {          if (&Apache::lonnet::put('nohist_userroles',
     delete $accesshash{$entry};               { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
                   $rudom,$runame) eq 'ok') {
       delete $userrolehash{$entry};
         }          }
     }      }
     $dumpcount++;      $dumpcount++;
Line 1062  sub courselog { Line 1467  sub courselog {
     $what=time.':'.$what;      $what=time.':'.$what;
     unless ($ENV{'request.course.id'}) { return ''; }      unless ($ENV{'request.course.id'}) { return ''; }
     $coursedombuf{$ENV{'request.course.id'}}=      $coursedombuf{$ENV{'request.course.id'}}=
        $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.         $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
       $coursenumbuf{$ENV{'request.course.id'}}=
        $ENV{'course.'.$ENV{'request.course.id'}.'.num'};         $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
     $coursehombuf{$ENV{'request.course.id'}}=      $coursehombuf{$ENV{'request.course.id'}}=
        $ENV{'course.'.$ENV{'request.course.id'}.'.home'};         $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
       $coursedescrbuf{$ENV{'request.course.id'}}=
          $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
       $courseinstcodebuf{$ENV{'request.course.id'}}=
          $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
     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 1080  sub courseacclog { Line 1490  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';          $what.=':POST';
  foreach (keys %ENV) {   foreach (keys %ENV) {
             if ($_=~/^form\.(.*)/) {              if ($_=~/^form\.(.*)/) {
Line 1093  sub courseacclog { Line 1503  sub courseacclog {
   
 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}++;  }
   
   sub linklog {
       my ($from,$to)=@_;
       $from=&declutter($from);
       $to=&declutter($to);
       $accesshash{$from.'___'.$to.'___comefrom'}=1;
       $accesshash{$to.'___'.$from.'___goto'}=1;
   }
     
   sub userrolelog {
       my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
       if (($trole=~/^ca/) || ($trole=~/^in/) || 
           ($trole=~/^cc/) || ($trole=~/^ep/) ||
           ($trole=~/^cr/) || ($trole=~/^ta/)) {
          my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
          $userrolehash
            {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
                       =$tend.':'.$tstart;
      }
   }
   
   sub get_course_adv_roles {
       my $cid=shift;
       $cid=$ENV{'request.course.id'} unless (defined($cid));
       my %coursehash=&coursedescription($cid);
       my %nothide=();
       foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
    $nothide{join(':',split(/[\@\:]/,$_))}=1;
       }
       my %returnhash=();
       my %dumphash=
               &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
       my $now=time;
       foreach (keys %dumphash) {
    my ($tend,$tstart)=split(/\:/,$dumphash{$_});
           if (($tstart) && ($tstart<0)) { next; }
           if (($tend) && ($tend<$now)) { next; }
           if (($tstart) && ($now<$tstart)) { next; }
           my ($role,$username,$domain,$section)=split(/\:/,$_);
    if ((&privileged($username,$domain)) && 
       (!$nothide{$username.':'.$domain})) { next; }
           my $key=&plaintext($role);
           if ($section) { $key.=' (Sec/Grp '.$section.')'; }
           if ($returnhash{$key}) {
       $returnhash{$key}.=','.$username.':'.$domain;
           } else {
               $returnhash{$key}=$username.':'.$domain;
           }
        }
       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 {      } else {
         $accesshash{$key}=1;   return '';
     }      }
 }  }
       
   # ---------------------------------------------------------- Course ID routines
   # Deal with domain's nohist_courseid.db files
   #
   
   sub courseidput {
       my ($domain,$what,$coursehome)=@_;
       return &reply('courseidput:'.$domain.':'.$what,$coursehome);
   }
   
   sub courseiddump {
       my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
       my %returnhash=();
       unless ($domfilter) { $domfilter=''; }
       foreach my $tryserver (keys %libserv) {
           if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
       if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
           foreach (
                    split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
          $sincefilter.':'.&escape($descfilter),
                                  $tryserver))) {
       my ($key,$value)=split(/\=/,$_);
                       if (($key) && ($value)) {
           $returnhash{&unescape($key)}=$value;
                       }
                   }
               }
           }
       }
       return %returnhash;
   }
   
   #
 # ----------------------------------------------------------- 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') { $res=$map; }
       my %times=&get('firstaccesstimes',[$res],$udom,$uname);
       return $times{$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') { $res=$map; }
       my $firstaccess=&get_first_access($type);
       if (!$firstaccess) {
    return &put('firstaccesstimes',{$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 $now=time;
Line 1213  sub devalidate { Line 1773  sub devalidate {
     my ($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
  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 '.
Line 1283  sub hash2str { Line 1843  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 1431  sub tmpreset { Line 1991  sub tmpreset {
   my ($symb,$namespace,$domain,$stuname) = @_;    my ($symb,$namespace,$domain,$stuname) = @_;
   if (!$symb) {    if (!$symb) {
     $symb=&symbread();      $symb=&symbread();
     if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }      if (!$symb) { $symb= $ENV{'request.url'}; }
   }    }
   $symb=escape($symb);    $symb=escape($symb);
   
Line 1572  sub store { Line 2132  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($$storehash{$_}).'&';          $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
Line 1605  sub cstore { Line 2169  sub cstore {
     }      }
     if (!$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($$storehash{$_}).'&';          $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
Line 1687  sub coursedescription { Line 2254  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 1707  sub rolesinit { Line 2304  sub rolesinit {
             my ($trole,$tend,$tstart)=split(/_/,$role);              my ($trole,$tend,$tstart)=split(/_/,$role);
             $userroles.='user.role.'.$trole.'.'.$area.'='.              $userroles.='user.role.'.$trole.'.'.$area.'='.
                         $tstart.'.'.$tend."\n";                          $tstart.'.'.$tend."\n";
   # log the associated role with the area
               &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
             if ($tend!=0) {              if ($tend!=0) {
         if ($tend<$now) {          if ($tend<$now) {
             $trole='';              $trole='';
Line 1718  sub rolesinit { Line 2317  sub rolesinit {
                 }                  }
             }              }
             if (($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);      my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
                    my $homsvr=homeserver($rauthor,$rdomain);       my $homsvr=homeserver($rauthor,$rdomain);
                    if ($hostname{$homsvr} ne '') {      if ($hostname{$homsvr} ne '') {
                       my $roledef=   my ($rdummy,$roledef)=
   reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",     &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
                                 $homsvr);  
                       if (($roledef ne 'con_lost') && ($roledef ne '')) {   if (($rdummy ne 'con_lost') && ($roledef ne '')) {
                          my ($syspriv,$dompriv,$coursepriv)=      my ($syspriv,$dompriv,$coursepriv)=
      split(/\_/,unescape($roledef));   split(/\_/,$roledef);
                   $allroles{'cm./'}.=':'.$syspriv;      if (defined($syspriv)) {
                          $allroles{$spec.'./'}.=':'.$syspriv;   $allroles{'cm./'}.=':'.$syspriv;
                          if ($tdomain ne '') {   $allroles{$spec.'./'}.=':'.$syspriv;
                              $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;      }
                              $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;      if ($tdomain ne '') {
                              if ($trest ne '') {   if (defined($dompriv)) {
                 $allroles{'cm.'.$area}.=':'.$coursepriv;      $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
                 $allroles{$spec.'.'.$area}.=':'.$coursepriv;      $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
                              }   }
                  }   if ($trest ne '') {
                       }      if (defined($coursepriv)) {
                    }   $allroles{'cm.'.$area}.=':'.$coursepriv;
                } else {   $allroles{$spec.'.'.$area}.=':'.$coursepriv;
            $allroles{'cm./'}.=':'.$pr{$trole.':s'};      }
            $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};   }
                    if ($tdomain ne '') {      }
                      $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};   }
                      $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};      }
                       if ($trest ne '') {   } else {
           $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};      if (defined($pr{$trole.':s'})) {
           $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};   $allroles{'cm./'}.=':'.$pr{$trole.':s'};
                       }   $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
            }      }
        }      if ($tdomain ne '') {
    if (defined($pr{$trole.':d'})) {
       $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
       $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
    }
    if ($trest ne '') {
       if (defined($pr{$trole.':c'})) {
    $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
    $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
       }
    }
       }
    }
             }              }
           }             } 
         }          }
Line 1851  sub dump { Line 2462  sub dump {
    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 1870  sub currentdump { Line 2496  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) {
Line 1903  sub currentdump { Line 2509  sub currentdump {
    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 1983  sub customaccess { Line 2640  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 1991  sub customaccess { Line 2651  sub customaccess {
   
 sub allowed {  sub allowed {
     my ($priv,$uri)=@_;      my ($priv,$uri)=@_;
       $uri=&deversion($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=~/\.meta$/)) && ($priv eq 'bre')) {      if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
Line 2043  sub allowed { Line 2704  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 2060  sub allowed { Line 2721  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 2078  sub allowed { Line 2744  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 $thisallowed;
     }      }
 #  #
Line 2099  sub allowed { Line 2765  sub allowed {
        if ($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;                 $checkreferer=0;
            }             }
Line 2127  sub allowed { Line 2793  sub allowed {
             if ($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 2180  sub allowed { Line 2846  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 2191  sub allowed { Line 2857  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 2225  sub allowed { Line 2891  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 2233  sub allowed { Line 2899  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 2245  sub allowed { Line 2911  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 2257  sub allowed { Line 2923  sub allowed {
    if ($thisallowed=~/X/) {     if ($thisallowed=~/X/) {
       if ($ENV{'acc.randomout'}) {        if ($ENV{'acc.randomout'}) {
          my $symb=&symbread($uri,1);           my $symb=&symbread($uri,1);
          if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {            if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) { 
             return '';               return ''; 
          }           }
       }        }
Line 2275  sub allowed { Line 2941  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 2290  sub is_on_map { Line 2957  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 2364  sub log_query { Line 3054  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 $homeserver;
       if ($context eq 'automated') {
           $homeserver = $perlvar{'lonHostID'};
       } else {
           $homeserver = &homeserver($cnum,$dom);
       }
       my $host=$hostname{$homeserver};
       my $cmd = '';
       foreach (keys %{$affiliatesref}) {
           $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
       }
       $cmd =~ s/%%$//;
       $cmd = &escape($cmd);
       my $query = 'fetchenrollment';
       my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
       unless ($queryid=~/^\Q$host\E\_/) { return 'error: '.$queryid; }
       my $reply = &get_query_reply($queryid);
       unless ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
           my @responses = split/:/,$reply;
           if ($homeserver eq $perlvar{'lonHostID'}) {
               foreach (@responses) {
                   my ($key,$value) = split/=/,$_;
                   $$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,$homeserver);
                           unless ($xml_classlist =~ /^error/) {
                               if ( open(FILE,">$destname") ) {
                                   print FILE &unescape($xml_classlist);
                                   close(FILE);
                               }
                           }
                       }
                   }
               }
           }
           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 2375  sub get_query_reply { Line 3118  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 2412  sub userlog_query { Line 3155  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') {
           $homeserver = $perlvar{'lonHostID'};
       } else {
           $homeserver = &homeserver($caller,$codedom);
       }
       my $host=$hostname{$homeserver};
       foreach (keys %{$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
   
 sub assignrole {  sub assignrole {
     my ($udom,$uname,$url,$role,$end,$start)=@_;      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 2435  sub assignrole { Line 3254  sub assignrole {
     } else {      } else {
         my $cwosec=$url;          my $cwosec=$url;
         $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;          $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
         unless (&allowed('c'.$role,$cwosec)) {           unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) { 
            &logthis('Refused assignrole: '.             &logthis('Refused 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 2453  sub assignrole { Line 3272  sub assignrole {
            $command.='_0_'.$start;             $command.='_0_'.$start;
         }          }
     }      }
     return &reply($command,&homeserver($uname,$udom));  # actually delete
       if ($deleteflag) {
    if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
   # modify command to delete the role
              $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
                   "$udom:$uname:$url".'_'."$mrole";
      &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom"); 
   # set start and finish to negative values for userrolelog
              $start=-1;
              $end=-1;
           }
       }
   # send command
       my $answer=&reply($command,&homeserver($uname,$udom));
   # log new user role if status is ok
       if ($answer eq 'ok') {
    &userrolelog($mrole,$uname,$udom,$url,$start,$end);
       }
       return $answer;
 }  }
   
 # -------------------------------------------------- Modify user authentication  # -------------------------------------------------- Modify user authentication
Line 2488  sub modifyuser { Line 3325  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.', '.$uid.', '.
Line 2500  sub modifyuser { Line 3337  sub modifyuser {
              ' in domain '.$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 2530  sub modifyuser { Line 3368  sub modifyuser {
         }             }   
         $uhome=&homeserver($uname,$udom,'true');          $uhome=&homeserver($uname,$udom,'true');
         if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {          if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
     return 'error: verify home';      return 'error: unable verify users home machine.';
         }          }
     }   # End of creation of new user      }   # End of creation of new user
 # ---------------------------------------------------------------------- Add ID  # ---------------------------------------------------------------------- Add ID
Line 2540  sub modifyuser { Line 3378  sub modifyuser {
        if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)          if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/) 
          && (!$forceid)) {           && (!$forceid)) {
   unless ($uid eq $uidhash{$uname}) {    unless ($uid eq $uidhash{$uname}) {
       return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;        return 'error: user id "'.$uid.'" does not match '.
                     'current user id "'.$uidhash{$uname}.'".';
           }            }
        } else {         } else {
   &idput($udom,($uname => $uid));    &idput($udom,($uname => $uid));
Line 2556  sub modifyuser { Line 3395  sub modifyuser {
     } else {      } else {
         %names = @tmp;          %names = @tmp;
     }      }
   #
   # Make sure to not trash student environment if instructor does not bother
   # to supply name and email information
   #
     if ($first)  { $names{'firstname'}  = $first; }      if ($first)  { $names{'firstname'}  = $first; }
     if ($middle) { $names{'middlename'} = $middle; }      if (defined($middle)) { $names{'middlename'} = $middle; }
     if ($last)   { $names{'lastname'}   = $last; }      if ($last)   { $names{'lastname'}   = $last; }
     if ($gene)   { $names{'generation'} = $gene; }      if (defined($gene))   { $names{'generation'} = $gene; }
       if ($email)  { $names{'notification'} = $email;
                      $names{'critnotification'} = $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 2573  sub modifyuser { Line 3419  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)   || $last   eq '' || 
Line 2616  sub modify_student_enrollment { Line 3472  sub modify_student_enrollment {
                        ['firstname','middlename','lastname', 'generation','id']                         ['firstname','middlename','lastname', 'generation','id']
                        ,$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 '');
Line 2627  sub modify_student_enrollment { Line 3483  sub modify_student_enrollment {
     }      }
     my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,      my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
                                                            $first,$middle);                                                             $first,$middle);
     my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.      my $reply=cput('classlist',
               $ENV{'course.'.$cid.'.num'}.':classlist:'.     {"$uname:$udom" => 
                       &escape($uname.':'.$udom).'='.   join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
                       &escape(join(':',$end,$start,$uid,$usec,$fullname)),     $cdom,$cnum);
               $ENV{'course.'.$cid.'.home'});  
     unless (($reply eq 'ok') || ($reply eq 'delayed')) {      unless (($reply eq 'ok') || ($reply eq 'delayed')) {
  return 'error: '.$reply;   return 'error: '.$reply;
     }      }
Line 2666  sub writecoursepref { Line 3521  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)=@_;
     $url=&declutter($url);      $url=&declutter($url);
     my $cid='';      my $cid='';
     unless (&allowed('ccc',$udom)) {      unless (&allowed('ccc',$udom)) {
Line 2699  sub createcourse { Line 3554  sub createcourse {
  return 'error: no such course';   return 'error: no such course';
     }      }
 # ----------------------------------------------------------------- Course made  # ----------------------------------------------------------------- Course made
   # log existence
       &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
                    '='.&escape($inst_code),$uhome);
       &flushcourselogs();
   # set toplevel url
     my $topurl=$url;      my $topurl=$url;
     unless ($nonstandard) {      unless ($nonstandard) {
 # ------------------------------------------ For standard courses, make top url  # ------------------------------------------ For standard courses, make top url
Line 2727  ENDINITMAP Line 3587  ENDINITMAP
 # ---------------------------------------------------------- Assign Custom Role  # ---------------------------------------------------------- Assign Custom Role
   
 sub assigncustomrole {  sub assigncustomrole {
     my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;      my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
     return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,      return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
                        $end,$start);                         $end,$start,$deleteflag);
 }  }
   
 # ----------------------------------------------------------------- Revoke Role  # ----------------------------------------------------------------- Revoke Role
   
 sub revokerole {  sub revokerole {
     my ($udom,$uname,$url,$role)=@_;      my ($udom,$uname,$url,$role,$deleteflag)=@_;
     my $now=time;      my $now=time;
     return &assignrole($udom,$uname,$url,$role,$now);      return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
 }  }
   
 # ---------------------------------------------------------- Revoke Custom Role  # ---------------------------------------------------------- Revoke Custom Role
   
 sub revokecustomrole {  sub revokecustomrole {
     my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;      my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
     my $now=time;      my $now=time;
     return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);      return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
              $deleteflag);
 }  }
   
   
   # ------------------------------------------------------------ Portfolio Director Lister
   # returns listing of contents of user's /userfiles/portfolio/ directory
   # 
   
   sub portfoliolist {
       my ($currentPath, $currentFile) = @_;
       my ($udom, $uname, $portfolioRoot);
       $uname=$ENV{'user.name'};
       $udom=$ENV{'user.domain'};
       # really should interrogate the system for home directory information, but . . .
       $portfolioRoot = '/home/httpd/lonUsers/'.$udom.'/';
       $uname =~ /^(.?)(.?)(.?)/;
       $portfolioRoot = $portfolioRoot.$1.'/'.$2.'/'.$3.'/'.$uname.'/userfiles/portfolio';
       my $listing = &reply('ls:'.$portfolioRoot.$currentPath, &homeserver($uname,$udom));
       return $listing;
   }
   
   sub portfoliomanage {
   
   #FIXME please user the existing remove userfile function instead and
   #add a userfilerename functions.
   #FIXME uhome should never be an argument to any lonnet functions
   
       # handles deleting and renaming files in user's userfiles/portfolio/ directory
       # 
       my ($filename, $fileaction, $filenewname) = @_;
       my ($udom, $uname, $uhome);
       $uname=$ENV{'user.name'};
       $udom=$ENV{'user.domain'};
       $uhome=$ENV{'user.home'};
       my $listing = reply('portfoliomanage:'.$uname.':'.$udom.':'.$filename.':'.$fileaction.':'.$filenewname, $uhome);
       return $listing;
   }
   
   
 # ------------------------------------------------------------ Directory lister  # ------------------------------------------------------------ Directory lister
   
 sub dirlist {  sub dirlist {
Line 2810  sub dirlist { Line 3707  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 2826  sub dirlist { Line 3723  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 2834  sub GetFileTimestamp { Line 3738  sub GetFileTimestamp {
     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;      $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
     my $proname="$studentDomain/$subdir/$studentName";      my $proname="$studentDomain/$subdir/$studentName";
     $proname .= '/'.$filename;      $proname .= '/'.$filename;
     my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,      my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain, 
                                        $root);                                                $studentName, $root);
     my $fileStat = $dir[0];  
     my @stats = split('&', $fileStat);      my @stats = split('&', $fileStat);
     if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {      if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
         return $stats[9];          # @stats contains first the filename, then the stat output
           return $stats[10]; # so this is 10 instead of 9.
     } else {      } else {
         return -1;          return -1;
     }      }
Line 2902  sub condval { Line 3806  sub condval {
 sub devalidatecourseresdata {  sub devalidatecourseresdata {
     my ($coursenum,$coursedomain)=@_;      my ($coursenum,$coursedomain)=@_;
     my $hashid=$coursenum.':'.$coursedomain;      my $hashid=$coursenum.':'.$coursedomain;
     delete $courseresdatacache{$hashid.'.time'};      &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
 }  }
   
 # --------------------------------------------------- Course Resourcedata Query  # --------------------------------------------------- Course Resourcedata Query
Line 2911  sub courseresdata { Line 3815  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,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
     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(\%courseresdatacache,$hashid,$result,'courseres');
     $courseresdatacache{$hashid}=\%dumpreply;  
  } elsif ($tmp =~ /^(con_lost|no_such_host)/) {   } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
     return $tmp;      return $tmp;
    } elsif ($tmp =~ /^(error)/) {
       $result=undef;
       &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
  }   }
     }      }
     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;
 }  }
   
 # --------------------------------------------------------- Value of a Variable  #
   # EXT resource caching routines
   #
   
   sub clear_EXT_cache_status {
       &delenv('cache.EXT.');
   }
   
   sub EXT_cache_status {
       my ($target_domain,$target_user) = @_;
       my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
       if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
           # We know already the user has no data
           return 1;
       } else {
           return 0;
       }
   }
   
   sub EXT_cache_set {
       my ($target_domain,$target_user) = @_;
       my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
       &appenv($cachename => time);
   }
   
   # --------------------------------------------------------- Value of a Variable
 sub EXT {  sub EXT {
     my ($varname,$symbparm,$udom,$uname,)=@_;      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 $publicuser;
       if ($symbparm) {
    $symbparm=&get_symb_from_alias($symbparm);
       }
     if (!($uname && $udom)) {      if (!($uname && $udom)) {
       (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();        (my $cursymb,$courseid,$udom,$uname,$publicuser)=
     &Apache::lonxml::whichuser($symbparm);
       if (!$symbparm) { $symbparm=$cursymb; }        if (!$symbparm) { $symbparm=$cursymb; }
     } else {      } else {
  $courseid=$ENV{'request.course.id'};   $courseid=$ENV{'request.course.id'};
Line 2967  sub EXT { Line 3898  sub EXT {
     if (defined($Apache::lonhomework::parsing_a_problem)) {      if (defined($Apache::lonhomework::parsing_a_problem)) {
  return $Apache::lonhomework::history{$qualifierrest};   return $Apache::lonhomework::history{$qualifierrest};
     } else {      } else {
  my %restored=&restore($symbparm,$courseid,$udom,$uname);   my %restored;
    if ($publicuser || $ENV{'request.state'} eq 'construct') {
       %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
    } else {
       %restored=&restore($symbparm,$courseid,$udom,$uname);
    }
  return $restored{$qualifierrest};   return $restored{$qualifierrest};
     }      }
 # ----------------------------------------------------------------- user.access  # ----------------------------------------------------------------- user.access
Line 2980  sub EXT { Line 3916  sub EXT {
  ($udom eq $ENV{'user.domain'})) {   ($udom eq $ENV{'user.domain'})) {
  return $ENV{join('.',('environment',$qualifierrest))};   return $ENV{join('.',('environment',$qualifierrest))};
     } else {      } else {
  my %returnhash=&userenvironment($udom,$uname,$qualifierrest);   my %returnhash;
    if (!$publicuser) {
       %returnhash=&userenvironment($udom,$uname,
    $qualifierrest);
    }
  return $returnhash{$qualifierrest};   return $returnhash{$qualifierrest};
     }      }
 # ----------------------------------------------------------------- user.course  # ----------------------------------------------------------------- user.course
Line 3004  sub EXT { Line 3944  sub EXT {
             return $uname;              return $uname;
 # ---------------------------------------------------- Any other user namespace  # ---------------------------------------------------- Any other user namespace
         } else {          } else {
             my %reply=&get($space,[$qualifierrest],$udom,$uname);      my %reply;
             return $reply{$qualifierrest};      if (!$publicuser) {
    %reply=&get($space,[$qualifierrest],$udom,$uname);
       }
       return $reply{$qualifierrest};
         }          }
     } elsif ($realm eq 'query') {      } elsif ($realm eq 'query') {
 # ---------------------------------------------- pull stuff out of query string  # ---------------------------------------------- pull stuff out of query string
         &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);          &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
  return $ENV{'form.'.$space};    [$spacequalifierrest]);
    return $ENV{'form.'.$spacequalifierrest}; 
    } 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 3024  sub EXT { Line 3976  sub EXT {
         return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};          return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
     } elsif ($realm eq 'resource') {      } elsif ($realm eq 'resource') {
   
  if ($courseid eq $ENV{'request.course.id'}) {   my $section;
    if (defined($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) { $symbparm=&symbread(); }      if (!$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 {
  $section=&usection($udom,$uname,$courseid);                  if (! defined($usection)) {
                       $section=&usection($udom,$uname,$courseid);
                   } else {
                       $section = $usection;
                   }
     }      }
   
     my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;      my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
Line 3053  sub EXT { Line 4009  sub EXT {
     my $courselevelm=$courseid.'.'.$mapparm;      my $courselevelm=$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 (!   my $hashid="$udom:$uname";
  (exists($ENV{'cache.studentresdata'})   my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
     && (($ENV{'cache.studentresdata'}+1800) > time))) {   'userres');
  my %resourcedata=&get('resourcedata',   if (!defined($cached)) {
       [$courselevelr,$courselevelm,$courselevel],      my %resourcedata=&dump('resourcedata',$udom,$uname);
       $udom,$uname);      $result=\%resourcedata;
  my ($tmp)=keys(%resourcedata);      &do_cache(\%userresdatacache,$hashid,$result,'userres');
    }
    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 /) {
  $ENV{'cache.studentresdata'}=time;                          &EXT_cache_set($udom,$uname);
  &appenv(('cache.studentresdata'=>  
  $ENV{'cache.studentresdata'}));  
     } elsif ($tmp =~ /^(con_lost|no_such_host)/) {      } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
  return $tmp;   return $tmp;
     }      }
Line 3111  sub EXT { Line 4068  sub EXT {
  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 3127  sub EXT { Line 4084  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 3150  sub EXT { Line 4110  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&$name&default"};
    }
    if (defined($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 3170  sub add_prefix_and_part { Line 4146  sub add_prefix_and_part {
   
 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 '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
         ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {          ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
  return '';   ($uri =~ m|home/[^/]+/public_html/|)) {
    return undef;
     }      }
     my $filename=$uri;      my $filename=$uri;
     $uri=~s/\.meta$//;      $uri=~s/\.meta$//;
Line 3184  sub metadata { Line 4160  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(\%metacache,$uri,'meta');
    if (defined($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(\%metacache,$uri,'meta');
    }
         my %metathesekeys=();          my %metathesekeys=();
         unless ($filename=~/\.meta$/) { $filename.='.meta'; }          unless ($filename=~/\.meta$/) { $filename.='.meta'; }
  my $metastring=&getfile(&filelocation('',&clutter($filename)));   my $metastring;
    if ($uri !~ m|^uploaded/|) {
       $metastring=&getfile(&filelocation('',&clutter($filename)));
    }
         my $parser=HTML::LCParser->new(\$metastring);          my $parser=HTML::LCParser->new(\$metastring);
         my $token;          my $token;
         undef %metathesekeys;          undef %metathesekeys;
Line 3209  sub metadata { Line 4197  sub metadata {
     if (defined($token->[2]->{'id'})) {       if (defined($token->[2]->{'id'})) { 
  $keyroot.='_'.$token->[2]->{'id'};    $keyroot.='_'.$token->[2]->{'id'}; 
     }      }
     if ($metacache{$uri.':packages'}) {      if ($metacache{$uri}->{':packages'}) {
  $metacache{$uri.':packages'}.=','.$package.$keyroot;   $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
     } else {      } else {
  $metacache{$uri.':packages'}=$package.$keyroot;   $metacache{$uri}->{':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$/) {
    $unikey='parameter_0_'.$name;
    $part=0;
       } else {
    $unikey='parameter'.$keyroot.'_'.$name;
       }
     if ($subp eq 'display') {      if ($subp eq 'display') {
  $value.=' [Part: '.$part.']';   $value.=' [Part: '.$part.']';
     }      }
     my $unikey='parameter'.$keyroot.'_'.$name;      $metacache{$uri}->{':'.$unikey.'.part'}=$part;
     if ($subp eq 'default') { $unikey='parameter_0_'.$name; }  
     $metathesekeys{$unikey}=1;      $metathesekeys{$unikey}=1;
     $metacache{$uri.':'.$unikey.'.part'}=$part;      unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
     unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {   $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
  $metacache{$uri.':'.$unikey.'.'.$subp}=$value;      }
       if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
    $metacache{$uri}->{':'.$unikey}=
       $metacache{$uri}->{':'.$unikey.'.default'};
     }      }
     if (defined($metacache{$uri.':'.$unikey.'.default'})) {  
  $metacache{$uri.':'.$unikey}=  
     $metacache{$uri.':'.$unikey.'.default'}  
  }  
  }   }
     }      }
  } else {   } else {
Line 3265  sub metadata { Line 4262  sub metadata {
     foreach (sort(split(/\,/,&metadata($uri,'keys',      foreach (sort(split(/\,/,&metadata($uri,'keys',
        $location,$unikey,         $location,$unikey,
        $depthcount+1)))) {         $depthcount+1)))) {
    $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
  $metathesekeys{$_}=1;   $metathesekeys{$_}=1;
     }      }
  }   }
Line 3275  sub metadata { Line 4273  sub metadata {
  }   }
  $metathesekeys{$unikey}=1;   $metathesekeys{$unikey}=1;
  foreach (@{$token->[3]}) {   foreach (@{$token->[3]}) {
     $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};      $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
  }   }
  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 $default=$metacache{$uri}->{':'.$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;      $metacache{$uri}->{':'.$unikey}=$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;      $metacache{$uri}->{':'.$unikey}=$internaltext;
  }   }
 # end of not-a-package not-a-library import  # end of not-a-package not-a-library import
     }      }
Line 3295  sub metadata { Line 4293  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($metacache{$uri}->{':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 ($metacache{$uri}->{':copyright'} eq 'custom') {
   
     #      #
     # Importing a rights file here      # Importing a rights file here
     #      #
     unless ($depthcount) {      unless ($depthcount) {
  my $location=$metacache{$uri.':customdistributionfile'};   my $location=$metacache{$uri}->{':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)))) {
       $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
     $metathesekeys{$_}=1;      $metathesekeys{$_}=1;
  }   }
     }      }
  }   }
  $metacache{$uri.':keys'}=join(',',keys %metathesekeys);   $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
  &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);   &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
  $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);   $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
  $metacache{$uri.':cachedtimestamp'}=time;   &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
 # 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 $metacache{$uri}->{':'.$what};
   }
   
   sub metadata_create_package_def {
       my ($uri,$key,$package,$metathesekeys)=@_;
       my ($pack,$name,$subp)=split(/\&/,$key);
       if ($subp eq 'default') { next; }
       
       if (defined($metacache{$uri}->{':packages'})) {
    $metacache{$uri}->{':packages'}.=','.$package;
       } else {
    $metacache{$uri}->{':packages'}=$package;
       }
       my $value=$packagetab{$key};
       my $unikey;
       $unikey='parameter_0_'.$name;
       $metacache{$uri}->{':'.$unikey.'.part'}=0;
       $$metathesekeys{$unikey}=1;
       unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
    $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
       }
       if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
    $metacache{$uri}->{':'.$unikey}=
       $metacache{$uri}->{':'.$unikey.'.default'};
       }
 }  }
   
 sub metadata_generate_part0 {  sub metadata_generate_part0 {
Line 3327  sub metadata_generate_part0 { Line 4366  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($$metadata{'parameter_0_'.$name})) {    if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
     $allnames{$name}=$part;      $allnames{$name}=$part;
   }    }
  }   }
     }      }
     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 3359  sub gettitle { Line 4398  sub gettitle {
  unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }   unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
         return &metadata($urlsymb,'title');           return &metadata($urlsymb,'title'); 
     }      }
     if ($titlecache{$symb}) { return $titlecache{$symb}; }      my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
     my ($map,$resid,$url)=split(/\_\_\_/,$symb);      if (defined($cached)) { return $result; }
       my ($map,$resid,$url)=&decode_symb($symb);
     my $title='';      my $title='';
     my %bighash;      my %bighash;
     if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',      if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
Line 3369  sub gettitle { Line 4409  sub gettitle {
         $title=$bighash{'title_'.$mapid.'.'.$resid};          $title=$bighash{'title_'.$mapid.'.'.$resid};
         untie %bighash;          untie %bighash;
     }      }
       $title=~s/\&colon\;/\:/gs;
     if ($title) {      if ($title) {
         $titlecache{$symb}=$title;          return &do_cache(\%titlecache,$symb,$title,'title');
         return $title;  
     } else {      } else {
  return &metadata($urlsymb,'title');   return &metadata($urlsymb,'title');
     }      }
Line 3381  sub gettitle { Line 4421  sub gettitle {
   
 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{$_};                  $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
             }              }
             if (untie(%hash)) {              if (untie(%hash)) {
  return 'ok';   return 'ok';
Line 3400  sub symblist { Line 4440  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 3445  sub symbclean { Line 4492  sub symbclean {
 # 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 ($map,$resid,$url)=split(/\_\_\_/,shift);
       return (&fixversion($map),$resid,&fixversion($url));
   }
   
   sub fixversion {
       my $fn=shift;
       if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
       my %bighash;
       my $uri=&clutter($fn);
       my $key=$ENV{'request.course.id'}.'_'.$uri;
   # is this cached?
       my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
       'courseresversion',600);
       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\.$1/;
        }
     }
     untie %bighash;
       }
       return &do_cache
    (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
   }
   
   sub deversion {
       my $url=shift;
       $url=~s/\.\d+\.(\w+)$/\.$1/;
       return $url;
   }
   
 # ------------------------------------------------------ Return symb list entry  # ------------------------------------------------------ Return symb list entry
   
 sub symbread {  sub symbread {
Line 3466  sub symbread { Line 4560  sub symbread {
     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\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
               $targetfn = 'adm/wrapper/'.$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{$targetfn};
             untie(%hash);              untie(%hash);
         }          }
 # ---------------------------------------------------------- There was an entry  # ---------------------------------------------------------- There was an entry
Line 3520  sub symbread { Line 4618  sub symbread {
                  }                   }
       }        }
               untie(%bighash)                untie(%bighash)
            }              }
         }          }
         if ($syval) {          if ($syval) {
            return &symbclean($syval.'___'.$thisfn);              return &symbclean($syval.'___'.$thisfn); 
Line 3542  sub numval { Line 4640  sub numval {
     $txt=~tr/u-z/0-5/;      $txt=~tr/u-z/0-5/;
     $txt=~s/\D//g;      $txt=~s/\D//g;
     return int($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; }
       return int($total);
   }
   
   sub latest_rnd_algorithm_id {
       return '64bit3';
   }
   
   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 getCODE {
       if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
       if (defined($Apache::lonhomework::parsing_a_problem) &&
    defined($Apache::lonhomework::history{'resource.CODE'})) {
    return $Apache::lonhomework::history{'resource.CODE'};
       }
       return undef;
   }
   
 sub rndseed {  sub rndseed {
     my ($symb,$courseid,$domain,$username)=@_;      my ($symb,$courseid,$domain,$username)=@_;
   
       my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
     if (!$symb) {      if (!$symb) {
       unless ($symb=&symbread()) { return time; }   unless ($symb=$wsymb) { return time; }
       }
       if (!$courseid) { $courseid=$wcourseid; }
       if (!$domain) { $domain=$wdomain; }
       if (!$username) { $username=$wusername }
       my $which=&get_rand_alg();
       if (defined(&getCODE())) {
    return &rndseed_CODE_64bit($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') {
    return &rndseed_64bit($symb,$courseid,$domain,$username);
       }
       return &rndseed_32bit($symb,$courseid,$domain,$username);
   }
   
   sub rndseed_32bit {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    my $symbchck=unpack("%32C*",$symb) << 27;
    my $symbseed=numval($symb) << 22;
    my $namechck=unpack("%32C*",$username) << 17;
    my $nameseed=numval($username) << 12;
    my $domainseed=unpack("%32C*",$domain) << 7;
    my $courseseed=unpack("%32C*",$courseid);
    my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
    #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
    #&Apache::lonxml::debug("rndseed :$num:$symb");
    return $num;
       }
   }
   
   sub rndseed_64bit {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    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";
     }      }
     if (!$courseid) { $courseid=$ENV{'request.course.id'};}  }
     if (!$domain) {$domain=$ENV{'user.domain'};}  
     if (!$username) {$username=$ENV{'user.name'};}  sub rndseed_64bit2 {
       my ($symb,$courseid,$domain,$username)=@_;
     {      {
       use integer;   use integer;
       my $symbchck=unpack("%32C*",$symb) << 27;   # strings need to be an even # of cahracters long, it it is odd the
       my $symbseed=numval($symb) << 22;          # last characters gets thrown away
       my $namechck=unpack("%32C*",$username) << 17;   my $symbchck=unpack("%32S*",$symb.' ') << 21;
       my $nameseed=numval($username) << 12;   my $symbseed=numval($symb) << 10;
       my $domainseed=unpack("%32C*",$domain) << 7;   my $namechck=unpack("%32S*",$username.' ');
       my $courseseed=unpack("%32C*",$courseid);  
       my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;   my $nameseed=numval($username) << 21;
       #uncommenting these lines can break things!   my $domainseed=unpack("%32S*",$domain.' ') << 10;
       #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");   my $courseseed=unpack("%32S*",$courseid.' ');
       #&Apache::lonxml::debug("rndseed :$num:$symb");  
       return $num;   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";
     }      }
 }  }
   
   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 :$num:$symb");
    return "$num1:$num2";
       }
   }
   
   sub rndseed_CODE_64bit {
       my ($symb,$courseid,$domain,$username)=@_;
       {
    use integer;
    my $symbchck=unpack("%32S*",$symb.' ') << 16;
    my $symbseed=numval2($symb);
    my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
    my $CODEseed=numval(&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");
    return "$num1:$num2";
       }
   }
   
   sub setup_random_from_rndseed {
       my ($rndseed)=@_;
       if ($rndseed =~/([,:])/) {
    my ($num1,$num2)=split(/[,:]/,$rndseed);
    &Math::Random::random_set_seed(abs($num1),abs($num2));
       } else {
    &Math::Random::random_set_seed_from_phrase($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,$caller) = @_;
  if ($file=~/^\/*uploaded\//) { # user file  
       if ($file !~ m|^/*uploaded/(\w+)/(\w+)/(.+)$|) {
    # normal file from res space
    &repcopy($file);
           return &readfile($file);
       }
   
       my $info;
       my $cdom = $1;
       my $cnum = $2;
       my $filename = $3;
       my $path = $Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles';
       my ($lwpresp,$rtncode);
       my $localfile = $path.'/'.$cdom.'/'.$cnum.'/'.$filename;
       if (-e "$localfile") {
    my @fileinfo = stat($localfile);
    $lwpresp = &getuploaded('HEAD',$file,$cdom,$cnum,\$info,\$rtncode);
    if ($lwpresp ne 'ok') {
       if ($rtncode eq '404') {
    unlink($localfile);
       }
       #my $ua=new LWP::UserAgent;
       #my $request=new HTTP::Request('GET',&tokenwrapper($file));
       #my $response=$ua->request($request);
       #if ($response->is_success()) {
    # return $response->content;
    #    } else {
    # return -1;
    #    }
       return -1;
    }
    if ($info < $fileinfo[9]) {
       return &readfile($localfile);
    }
    $info = '';
    $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
    if ($lwpresp ne 'ok') {
       return -1;
    }
       } else {
    $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
    if ($lwpresp ne 'ok') {
       my $ua=new LWP::UserAgent;
       my $request=new HTTP::Request('GET',&tokenwrapper($file));
       my $response=$ua->request($request);
       if ($response->is_success()) {
    return $response->content;
       } else {
    return -1;
       }
    }
    my @parts = ($cdom,$cnum); 
    if ($filename =~ m|^(.+)/[^/]+$|) {
       push @parts, split(/\//,$1);
    }
    foreach my $part (@parts) {
       $path .= '/'.$part;
       if (!-e $path) {
    mkdir($path,0770);
       }
    }
       }
       open (FILE,">$localfile");
       print FILE $info;
       close(FILE);
       if ($caller eq 'uploadrep') {
    return 'ok';
       }
       return $info;
   }
   
   sub tokenwrapper {
       my $uri=shift;
       $uri=~s/^http\:\/\/([^\/]+)//;
       $uri=~s/^\///;
       $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
       my $token=$1;
       if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
           &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
           return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
                  (($uri=~/\?/)?'&':'?').'token='.$token.
                                  '&tokenissued='.$perlvar{'lonHostID'};
       } else {
           return '/adm/notfound.html';
       }
   }
   
   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 {
Line 3622  sub filelocation { Line 5013  sub filelocation {
   } elsif ($file=~/^\/*uploaded/) { # is an uploaded file    } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
     $location=$file;      $location=$file;
   } else {    } else {
     $file=~s/^$perlvar{'lonDocRoot'}//;      $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
     $file=~s:^/*res::;      $file=~s:^/res/:/:;
     if ( !( $file =~ m:^/:) ) {      if ( !( $file =~ m:^/:) ) {
       $location = $dir. '/'.$file;        $location = $dir. '/'.$file;
     } else {      } else {
Line 3632  sub filelocation { Line 5023  sub filelocation {
   }    }
   $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'}//;      $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
     $thisfn=~s/^\///;      $thisfn=~s/^\///;
     $thisfn=~s/^res\///;      $thisfn=~s/^res\///;
     $thisfn=~s/\?.+$//;      $thisfn=~s/\?.+$//;
Line 3662  sub declutter { Line 5081  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|adm|userfiles|ext|raw|priv|public)\//) { 
        $thisfn='/res'.$thisfn;          $thisfn='/res'.$thisfn; 
     }      }
     return $thisfn;      return $thisfn;
Line 3684  sub unescape { Line 5103  sub unescape {
     return $str;      return $str;
 }  }
   
   sub mod_perl_version {
       if (defined($perlvar{'MODPERL2'})) {
    return 2;
       }
       return 1;
   }
   
   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',scalar(%badServerCache)));
   #converted
      &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
      &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
      &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
      &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
   #1.1 only
      &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
      &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
      &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
      &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
    &flushcourselogs();     &flushcourselogs();
    &logthis("Shutting down");     &logthis("Shutting down");
      return DONE;
 }  }
   
 BEGIN {  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");      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 3716  BEGIN { Line 5161  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 ($configline =~ /^(\#|\s*$)/);
Line 3761  BEGIN { Line 5213  BEGIN {
  }   }
        }         }
     }      }
       close($config);
 }  }
   
 # ------------------------------------------------------ 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 3773  BEGIN { Line 5226  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 3870  being set. Line 5328  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';
   
 no_such_host : unable to fund a host associated with the user/domain   #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.
   
   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 3919  that was requested Line 5457  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 3936  delenv($regexp) : removes all items from Line 5477  delenv($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<usection()>
 usection($udom,$uname,$cname) : finds the section of student in the  B<usection($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 4347  dumps the complete (or key matching rege Line 5889  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)
   
Line 4457  messages of critical importance should g Line 6007  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 *
   
Removed from v.1.346  
changed lines
  Added in v.1.522

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