![]() ![]() | ![]() |
- the great ENV -> env switch has commenced
# The LearningOnline Network # TCP networking package # # $Id: lonnet.pm,v 1.619 2005/04/05 20:43:27 albertel Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # ### package Apache::lonnet; use strict; use LWP::UserAgent(); use HTTP::Headers; use HTTP::Date; # use Date::Parse; use vars qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom %libserv %pr %prp $memcache %packagetab %courselogs %accesshash %userrolehash $processmarker $dumpcount %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %domaindescription %domain_auth_def %domain_auth_arg_def %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit %env); use IO::Socket; use GDBM_File; use Apache::Constants qw(:common :http); use HTML::LCParser; use Fcntl qw(:flock); use Apache::lonlocal; use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze); use Time::HiRes qw( gettimeofday tv_interval ); use Cache::Memcached; my $readit; my $max_connection_retries = 10; # Or some such value. require Exporter; our @ISA = qw (Exporter); our @EXPORT = qw(%env); =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 sub logtouch { my $execdir=$perlvar{'lonDaemons'}; unless (-e "$execdir/logs/lonnet.log") { open(my $fh,">>$execdir/logs/lonnet.log"); close $fh; } my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3]; chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log'); } sub logthis { my $message=shift; my $execdir=$perlvar{'lonDaemons'}; my $now=time; my $local=localtime($now); if (open(my $fh,">>$execdir/logs/lonnet.log")) { print $fh "$local ($$): $message\n"; close($fh); } return 1; } sub logperm { my $message=shift; my $execdir=$perlvar{'lonDaemons'}; my $now=time; my $local=localtime($now); if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) { print $fh "$now:$message:$local\n"; close($fh); } return 1; } # -------------------------------------------------- Non-critical communication sub subreply { my ($cmd,$server)=@_; my $peerfile="$perlvar{'lonSockDir'}/$server"; # # With loncnew process trimming, there's a timing hole between lonc server # process exit and the master server picking up the listen on the AF_UNIX # socket. In that time interval, a lock file will exist: my $lockfile=$peerfile.".lock"; while (-e $lockfile) { # Need to wait for the lockfile to disappear. sleep(1); } # At this point, either a loncnew parent is listening or an old lonc # or loncnew child is listening so we can connect or everything's dead. # # We'll give the connection a few tries before abandoning it. If # connection is not possible, we'll con_lost back to the client. # my $client; for (my $retries = 0; $retries < $max_connection_retries; $retries++) { $client=IO::Socket::UNIX->new(Peer =>"$peerfile", Type => SOCK_STREAM, Timeout => 10); if($client) { last; # Connected! } sleep(1); # Try again later if failed connection. } my $answer; if ($client) { print $client "$cmd\n"; $answer=<$client>; if (!$answer) { $answer="con_lost"; } chomp($answer); } else { $answer = 'con_lost'; # Failed connection. } return $answer; } sub reply { my ($cmd,$server)=@_; unless (defined($hostname{$server})) { return 'no_such_host'; } my $answer=subreply($cmd,$server); if (($answer=~/^refused/) || ($answer=~/^rejected/)) { &logthis("<font color=blue>WARNING:". " $cmd to $server returned $answer</font>"); } return $answer; } # ----------------------------------------------------------- Send USR1 to lonc sub reconlonc { my $peerfile=shift; &logthis("Trying to reconnect for $peerfile"); my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid"; if (open(my $fh,"<$loncfile")) { my $loncpid=<$fh>; chomp($loncpid); if (kill 0 => $loncpid) { &logthis("lonc at pid $loncpid responding, sending USR1"); kill USR1 => $loncpid; sleep 1; if (-e "$peerfile") { return; } &logthis("$peerfile still not there, give it another try"); sleep 5; if (-e "$peerfile") { return; } &logthis( "<font color=blue>WARNING: $peerfile still not there, giving up</font>"); } else { &logthis( "<font color=blue>WARNING:". " lonc at pid $loncpid not responding, giving up</font>"); } } else { &logthis('<font color=blue>WARNING: lonc not running, giving up</font>'); } } # ------------------------------------------------------ Critical communication sub critical { my ($cmd,$server)=@_; unless ($hostname{$server}) { &logthis("<font color=blue>WARNING:". " Critical message to unknown server ($server)</font>"); return 'no_such_host'; } my $answer=reply($cmd,$server); if ($answer eq 'con_lost') { &reconlonc("$perlvar{'lonSockDir'}/$server"); my $answer=reply($cmd,$server); if ($answer eq 'con_lost') { my $now=time; my $middlename=$cmd; $middlename=substr($middlename,0,16); $middlename=~s/\W//g; my $dfilename= "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server"; $dumpcount++; { my $dfh; if (open($dfh,">$dfilename")) { print $dfh "$cmd\n"; close($dfh); } } sleep 2; my $wcmd=''; { my $dfh; if (open($dfh,"<$dfilename")) { $wcmd=<$dfh>; close($dfh); } } chomp($wcmd); if ($wcmd eq $cmd) { &logthis("<font color=blue>WARNING: ". "Connection buffer $dfilename: $cmd</font>"); &logperm("D:$server:$cmd"); return 'con_delayed'; } else { &logthis("<font color=red>CRITICAL:" ." Critical connection failed: $server $cmd</font>"); &logperm("F:$server:$cmd"); return 'con_failed'; } } } 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; $env{$envname} = $envvalue; if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) { if ($time < time-300) { $Remove{$key}++; } } } $ENV{'user.environment'} = "$lonidsdir/$handle.id"; $env{'user.environment'} = "$lonidsdir/$handle.id"; foreach my $expired_key (keys(%Remove)) { &delenv($expired_key); } } # ---------------------------------------------------------- Append Environment sub appenv { my %newenv=@_; foreach (keys %newenv) { if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) { &logthis("<font color=blue>WARNING: ". "Attempt to modify environment ".$_." to ".$newenv{$_} .'</font>'); delete($newenv{$_}); } else { $ENV{$_}=$newenv{$_}; $env{$_}=$newenv{$_}; } } my $lockfh; unless (open($lockfh,"$ENV{'user.environment'}")) { return 'error: '.$!; } unless (flock($lockfh,LOCK_EX)) { &logthis("<font color=blue>WARNING: ". 'Could not obtain exclusive lock in appenv: '.$!); close($lockfh); return 'error: '.$!; } my @oldenv; { my $fh; unless (open($fh,"$ENV{'user.environment'}")) { return 'error: '.$!; } @oldenv=<$fh>; close($fh); } for (my $i=0; $i<=$#oldenv; $i++) { chomp($oldenv[$i]); if ($oldenv[$i] ne '') { my ($name,$value)=split(/=/,$oldenv[$i]); unless (defined($newenv{$name})) { $newenv{$name}=$value; } } } { my $fh; unless (open($fh,">$ENV{'user.environment'}")) { return 'error'; } my $newname; foreach $newname (keys %newenv) { print $fh "$newname=$newenv{$newname}\n"; } close($fh); } close($lockfh); return 'ok'; } # ----------------------------------------------------- Delete from Environment sub delenv { my $delthis=shift; my %newenv=(); if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) { &logthis("<font color=blue>WARNING: ". "Attempt to delete from environment ".$delthis); return 'error'; } my @oldenv; { my $fh; unless (open($fh,"$ENV{'user.environment'}")) { return 'error'; } unless (flock($fh,LOCK_SH)) { &logthis("<font color=blue>WARNING: ". 'Could not obtain shared lock in delenv: '.$!); close($fh); return 'error: '.$!; } @oldenv=<$fh>; close($fh); } { my $fh; unless (open($fh,">$ENV{'user.environment'}")) { return 'error'; } unless (flock($fh,LOCK_EX)) { &logthis("<font color=blue>WARNING: ". 'Could not obtain exclusive lock in delenv: '.$!); close($fh); return 'error: '.$!; } foreach (@oldenv) { if ($_=~/^$delthis/) { my ($key,undef) = split('=',$_); delete($ENV{$key}); delete($env{$key}); } else { print $fh $_; } } close($fh); } 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 $userloadpercent; } # ------------------------------------------ Fight off request when overloaded sub overloaderror { my ($r,$checkserver)=@_; unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; } my $loadavg; if ($checkserver eq $perlvar{'lonHostID'}) { open(my $loadfile,'/proc/loadavg'); $loadavg=<$loadfile>; $loadavg =~ s/\s.*//g; $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'}; close($loadfile); } else { $loadavg=&reply('load',$checkserver); } my $overload=$loadavg-100; if ($overload>0) { $r->err_headers_out->{'Retry-After'}=$overload; $r->log_error('Overload of '.$overload.' on '.$checkserver); return 413; } return ''; } # ------------------------------ Find server with least workload from spare.tab sub spareserver { my ($loadpercent,$userloadpercent) = @_; my $tryserver; my $spareserver=''; if ($userloadpercent !~ /\d/) { $userloadpercent=0; } my $lowestserver=$loadpercent > $userloadpercent? $loadpercent : $userloadpercent; foreach $tryserver (keys %spareid) { my $loadans=reply('load',$tryserver); my $userloadans=reply('userload',$tryserver); if ($loadans !~ /\d/ && $userloadans !~ /\d/) { 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 $spareserver; } # --------------------------------------------- Try to change a user's password sub changepass { my ($uname,$udom,$currentpass,$newpass,$server)=@_; $currentpass = &escape($currentpass); $newpass = &escape($newpass); my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass", $server); if (! $answer) { &logthis("No reply on password change request to $server ". "by $uname in domain $udom."); } elsif ($answer =~ "^ok") { &logthis("$uname in $udom successfully changed their password ". "on $server."); } elsif ($answer =~ "^pwchange_failure") { &logthis("$uname in $udom was unable to change their password ". "on $server. The action was blocked by either lcpasswd ". "or pwchange"); } elsif ($answer =~ "^non_authorized") { &logthis("$uname in $udom did not get their password correct when ". "attempting to change it on $server."); } elsif ($answer =~ "^auth_mode_error") { &logthis("$uname in $udom attempted to change their password despite ". "not being locally or internally authenticated on $server."); } elsif ($answer =~ "^unknown_user") { &logthis("$uname in $udom attempted to change their password ". "on $server but were unable to because $server is not ". "their home server."); } elsif ($answer =~ "^refused") { &logthis("$server refused to change $uname in $udom password because ". "it was sent an unencrypted request to change the password."); } return $answer; } # ----------------------- Try to determine user's current authentication scheme sub queryauthenticate { my ($uname,$udom)=@_; my $uhome=&homeserver($uname,$udom); if (!$uhome) { &logthis("User $uname at $udom is unknown when looking for authentication mechanism"); return 'no_host'; } my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome); if ($answer =~ /^(unknown_user|refused|con_lost)/) { &logthis("User $uname at $udom threw error $answer when checking authentication mechanism"); } return $answer; } # --------- Try to authenticate user from domain's lib servers (first this one) sub authenticate { my ($uname,$upass,$udom)=@_; $upass=escape($upass); $uname=~s/\W//g; my $uhome=&homeserver($uname,$udom); if (!$uhome) { &logthis("User $uname at $udom is unknown in authenticate"); return 'no_host'; } my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome); if ($answer eq 'authorized') { &logthis("User $uname at $udom authorized by $uhome"); return $uhome; } if ($answer eq 'non_authorized') { &logthis("User $uname at $udom rejected by $uhome"); return 'no_host'; } &logthis("User $uname at $udom threw error $answer when checking authentication mechanism"); return 'no_host'; } # ---------------------- Find the homebase for a user from domain's lib servers my %homecache; sub homeserver { my ($uname,$udom,$ignoreBadCache)=@_; my $index="$uname:$udom"; if (exists($homecache{$index})) { return $homecache{$index}; } my $tryserver; foreach $tryserver (keys %libserv) { next if ($ignoreBadCache ne 'true' && exists($badServerCache{$tryserver})); if ($hostdom{$tryserver} eq $udom) { my $answer=reply("home:$udom:$uname",$tryserver); if ($answer eq 'found') { return $homecache{$index}=$tryserver; } elsif ($answer eq 'no_host') { $badServerCache{$tryserver}=1; } } } return 'no_host'; } # ------------------------------------- Find the usernames behind a list of IDs sub idget { my ($udom,@ids)=@_; my %returnhash=(); my $tryserver; foreach $tryserver (keys %libserv) { if ($hostdom{$tryserver} eq $udom) { my $idlist=join('&',@ids); $idlist=~tr/A-Z/a-z/; my $reply=&reply("idget:$udom:".$idlist,$tryserver); my @answer=(); if (($reply ne 'con_lost') && ($reply!~/^error\:/)) { @answer=split(/\&/,$reply); } ; my $i; for ($i=0;$i<=$#ids;$i++) { if ($answer[$i]) { $returnhash{$ids[$i]}=$answer[$i]; } } } } return %returnhash; } # ------------------------------------- Find the IDs behind a list of usernames sub idrget { my ($udom,@unames)=@_; my %returnhash=(); foreach (@unames) { $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1]; } return %returnhash; } # ------------------------------- Store away a list of names and associated IDs sub idput { my ($udom,%ids)=@_; my %servers=(); foreach (keys %ids) { &cput('environment',{'id'=>$ids{$_}},$udom,$_); my $uhom=&homeserver($_,$udom); if ($uhom ne 'no_host') { my $id=&escape($ids{$_}); $id=~tr/A-Z/a-z/; my $unam=&escape($_); if ($servers{$uhom}) { $servers{$uhom}.='&'.$id.'='.$unam; } else { $servers{$uhom}=$id.'='.$unam; } } } foreach (keys %servers) { &critical('idput:'.$udom.':'.$servers{$_},$_); } } # --------------------------------------------------- Assign a key to a student sub assign_access_key { # # 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= $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom)); $cnum= $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum)); $udom=$ENV{'user.name'} unless (defined($udom)); $uname=$ENV{'user.domain'} unless (defined($uname)); my %existing=&get('accesskeys',[$ckey],$kdom,$knum); if (($existing{$ckey}=~/^\#(.*)$/) || # - new key ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) { # assigned to this person # - this should not happen, # unless something went wrong # the first time around # ready to assign $logentry=$1.'; '.$logentry; if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry}, $kdom,$knum) eq 'ok') { # key now belongs to user my $envkey='key.'.$cdom.'_'.$cnum; if (&put('environment',{$envkey => $ckey}) eq 'ok') { &appenv('environment.'.$envkey => $ckey); return 'ok'; } else { return 'error: Count not permanently assign key, will need to be re-entered later.'; } } else { return 'error: Could not assign key, try again later.'; } } elsif (!$existing{$ckey}) { # the key does not exist return 'error: The key does not exist'; } else { # the key is somebody else's return 'error: The key is already in use'; } } # ------------------------------------------ put an additional comment on a key sub comment_access_key { # # a valid key looks like uname:udom#comments # comments are being appended # my ($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 sub generate_access_keys { my ($number,$cdom,$cnum,$logentry)=@_; $cdom= $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom)); $cnum= $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum)); unless (&allowed('mky',$cdom)) { return 0; } unless (($cdom) && ($cnum)) { return 0; } if ($number>10000) { return 0; } sleep(2); # make sure don't get same seed twice srand(time()^($$+($$<<15))); # from "Programming Perl" my $total=0; for (my $i=1;$i<=$number;$i++) { my $newkey=sprintf("%lx",int(100000*rand)).'-'. sprintf("%lx",int(100000*rand)).'-'. sprintf("%lx",int(100000*rand)); $newkey=~s/1/g/g; # folks mix up 1 and l $newkey=~s/0/h/g; # and also 0 and O my %existing=&get('accesskeys',[$newkey],$cdom,$cnum); if ($existing{$newkey}) { $i--; } else { if (&put('accesskeys', { $newkey => '# generated '.localtime(). ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}. '; '.$logentry }, $cdom,$cnum) eq 'ok') { $total++; } } } &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'}, 'Generated '.$total.' keys for '.$cnum.' at '.$cdom); return $total; } # ------------------------------------------------------- Validate an accesskey sub validate_access_key { my ($ckey,$cdom,$cnum,$udom,$uname)=@_; $cdom= $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom)); $cnum= $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum)); $udom=$ENV{'user.domain'} unless (defined($udom)); $uname=$ENV{'user.name'} unless (defined($uname)); my %existing=&get('accesskeys',[$ckey],$cdom,$cnum); return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/); } # ------------------------------------- Find the section of student in a course sub getsection { my ($udom,$unam,$courseid)=@_; my $cachetime=1800; $courseid=~s/\_/\//g; $courseid=~s/^(\w)/\/$1/; my $hashid="$udom:$unam:$courseid"; my ($result,$cached)=&is_cached_new('getsection',$hashid); if (defined($cached)) { return $result; } my %Pending; my %Expired; # # Each role can either have not started yet (pending), be active, # or have expired. # # If there is an active role, we are done. # # If there is more than one role which has not started yet, # choose the one which will start sooner # If there is one role which has not started yet, return it. # # If there is more than one expired role, choose the one which ended last. # If there is a role which has expired, return it. # foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles', &homeserver($unam,$udom)))) { my ($key,$value)=split(/\=/,$_); $key=&unescape($key); next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/); my $section=$1; if ($key eq $courseid.'_st') { $section=''; } my ($dummy,$end,$start)=split(/\_/,&unescape($value)); my $now=time; if (defined($end) && $end && ($now > $end)) { $Expired{$end}=$section; next; } if (defined($start) && $start && ($now < $start)) { $Pending{$start}=$section; next; } return &do_cache_new('getsection',$hashid,$section,$cachetime); } # # Presumedly there will be few matching roles from the above # loop and the sorting time will be negligible. if (scalar(keys(%Pending))) { my ($time) = sort {$a <=> $b} keys(%Pending); return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime); } if (scalar(keys(%Expired))) { my @sorted = sort {$a <=> $b} keys(%Expired); my $time = pop(@sorted); return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime); } return &do_cache_new('getsection',$hashid,'-1',$cachetime); } sub save_cache { &purge_remembered(); } my $to_remember=-1; my %remembered; my %accessed; my $kicks=0; my $hits=0; sub devalidate_cache_new { my ($name,$id,$debug) = @_; if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); } $id=&escape($name.':'.$id); $memcache->delete($id); delete($remembered{$id}); delete($accessed{$id}); } sub is_cached_new { my ($name,$id,$debug) = @_; $id=&escape($name.':'.$id); if (exists($remembered{$id})) { if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); } $accessed{$id}=[&gettimeofday()]; $hits++; return ($remembered{$id},1); } my $value = $memcache->get($id); if (!(defined($value))) { if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); } return (undef,undef); } if ($value eq '__undef__') { if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); } $value=undef; } &make_room($id,$value,$debug); if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); } return ($value,1); } sub do_cache_new { my ($name,$id,$value,$time,$debug) = @_; $id=&escape($name.':'.$id); my $setvalue=$value; if (!defined($setvalue)) { $setvalue='__undef__'; } if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); } $memcache->set($id,$setvalue,$time); # need to make a copy of $value #&make_room($id,$value,$debug); return $value; } sub make_room { my ($id,$value,$debug)=@_; $remembered{$id}=$value; if ($to_remember<0) { return; } $accessed{$id}=[&gettimeofday()]; if (scalar(keys(%remembered)) <= $to_remember) { return; } my $to_kick; my $max_time=0; foreach my $other (keys(%accessed)) { if (&tv_interval($accessed{$other}) > $max_time) { $to_kick=$other; $max_time=&tv_interval($accessed{$other}); } } delete($remembered{$to_kick}); delete($accessed{$to_kick}); $kicks++; if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); } return; } sub purge_remembered { #&logthis("Tossing ".scalar(keys(%remembered))); #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered)))); undef(%remembered); undef(%accessed); } # ------------------------------------- Read an entry from a user's environment sub userenvironment { my ($udom,$unam,@what)=@_; my %returnhash=(); my @answer=split(/\&/, &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what), &homeserver($unam,$udom))); my $i; for ($i=0;$i<=$#what;$i++) { $returnhash{$what[$i]}=&unescape($answer[$i]); } return %returnhash; } # ---------------------------------------------------------- Get a studentphoto sub studentphoto { my ($udom,$unam,$ext) = @_; my $home=&Apache::lonnet::homeserver($unam,$udom); my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home); my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext; if ($ret ne 'ok') { return '/adm/lonKaputt/lonlogo_broken.gif'; } my $tokenurl=&Apache::lonnet::tokenwrapper($url); return $tokenurl; } # -------------------------------------------------------------------- New chat sub chatsend { my ($newentry,$anon)=@_; my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'}; my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}; my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'}; &reply('chatsend:'.$cdom.':'.$cnum.':'. &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'. &escape($newentry)),$chome); } # ------------------------------------------ Find current version of a resource sub getversion { my $fname=&clutter(shift); unless ($fname=~/^\/res\//) { return -1; } return ¤tversion(&filelocation('',$fname)); } sub currentversion { my $fname=shift; my ($result,$cached)=&is_cached_new('resversion',$fname); if (defined($cached)) { return $result; } my $author=$fname; $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; my ($udom,$uname)=split(/\//,$author); my $home=homeserver($uname,$udom); if ($home eq 'no_host') { return -1; } my $answer=reply("currentversion:$fname",$home); if (($answer eq 'con_lost') || ($answer eq 'rejected')) { return -1; } return &do_cache_new('resversion',$fname,$answer,600); } # ----------------------------- Subscribe to a resource, return URL if possible sub subscribe { my $fname=shift; if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; } $fname=~s/[\n\r]//g; my $author=$fname; $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; my ($udom,$uname)=split(/\//,$author); my $home=homeserver($uname,$udom); if ($home eq 'no_host') { return 'not_found'; } my $answer=reply("sub:$fname",$home); if (($answer eq 'con_lost') || ($answer eq 'rejected')) { $answer.=' by '.$home; } return $answer; } # -------------------------------------------------------------- Replicate file sub repcopy { my $filename=shift; $filename=~s/\/+/\//g; if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; } if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; } if ($filename=~m|^/home/httpd/html/userfiles/| or $filename=~m -^/*(uploaded|editupload)/-) { return &repcopy_userfile($filename); } $filename=~s/[\n\r]//g; my $transname="$filename.in.transfer"; if ((-e $filename) || (-e $transname)) { return 'ok'; } my $remoteurl=subscribe($filename); if ($remoteurl =~ /^con_lost by/) { &logthis("Subscribe returned $remoteurl: $filename"); return 'unavailable'; } elsif ($remoteurl eq 'not_found') { #&logthis("Subscribe returned not_found: $filename"); return 'not_found'; } elsif ($remoteurl =~ /^rejected by/) { &logthis("Subscribe returned $remoteurl: $filename"); return 'forbidden'; } elsif ($remoteurl eq 'directory') { return 'ok'; } else { my $author=$filename; $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; my ($udom,$uname)=split(/\//,$author); my $home=homeserver($uname,$udom); unless ($home eq $perlvar{'lonHostID'}) { my @parts=split(/\//,$filename); my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]"; if ($path ne "$perlvar{'lonDocRoot'}/res") { &logthis("Malconfiguration for replication: $filename"); return 'bad_request'; } my $count; for ($count=5;$count<$#parts;$count++) { $path.="/$parts[$count]"; if ((-e $path)!=1) { mkdir($path,0777); } } my $ua=new LWP::UserAgent; my $request=new HTTP::Request('GET',"$remoteurl"); my $response=$ua->request($request,$transname); if ($response->is_error()) { unlink($transname); my $message=$response->status_line; &logthis("<font color=blue>WARNING:" ." LWP get: $message: $filename</font>"); return 'unavailable'; } else { if ($remoteurl!~/\.meta$/) { my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta'); my $mresponse=$ua->request($mrequest,$filename.'.meta'); if ($mresponse->is_error()) { unlink($filename.'.meta'); &logthis( "<font color=yellow>INFO: No metadata: $filename</font>"); } } rename($transname,$filename); return 'ok'; } } } } # ------------------------------------------------ Get server side include body sub ssi_body { my ($filelink,%form)=@_; if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) { $form{'LONCAPA_INTERNAL_no_discussion'}='true'; } my $output=($filelink=~/^http\:/?&externalssi($filelink): &ssi($filelink,%form)); $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs; $output=~s/^.*?\<body[^\>]*\>//si; $output=~s/(.*)\<\/body\s*\>.*?$/$1/si; return $output; } # --------------------------------------------------------- Server Side Include sub ssi { my ($fn,%form)=@_; my $ua=new LWP::UserAgent; my $request; if (%form) { $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn); $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form)); } else { $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn); } $request->header(Cookie => $ENV{'HTTP_COOKIE'}); my $response=$ua->request($request); return $response->content; } sub externalssi { my ($url)=@_; my $ua=new LWP::UserAgent; my $request=new HTTP::Request('GET',$url); my $response=$ua->request($request); return $response->content; } # -------------------------------- Allow a /uploaded/ URI to be vouched for sub allowuploaded { my ($srcurl,$url)=@_; $url=&clutter(&declutter($url)); my $dir=$url; $dir=~s/\/[^\/]+$//; my %httpref=(); my $httpurl=&hreflocation('',$url); $httpref{'httpref.'.$httpurl}=$srcurl; &Apache::lonnet::appenv(%httpref); } # --------- File operations in /home/httpd/html/userfiles/$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 { 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 $fetchresult; } sub clean_filename { my ($fname)=@_; # Replace Windows backslashes by forward slashes $fname=~s/\\/\//g; # Get rid of everything but the actual filename $fname=~s/^.*\/([^\/]+)$/$1/; # Replace spaces by underscores $fname=~s/\s+/\_/g; # Replace all other weird characters by nothing $fname=~s/[^\w\.\-]//g; # Replace all .\d. sequences with _\d. so they no longer look like version # numbers $fname=~s/\.(\d+)(?=\.)/_$1/g; return $fname; } # --------------- Take an uploaded file and put it into the userfiles directory # input: name of form element, coursedoc=1 means this is for the course # output: url of file in userspace sub userfileupload { my ($formname,$coursedoc,$subdir)=@_; if (!defined($subdir)) { $subdir='unknown'; } my $fname=$ENV{'form.'.$formname.'.filename'}; $fname=&clean_filename($fname); # See if there is anything left unless ($fname) { return 'error: no uploaded file'; } chop($ENV{'form.'.$formname}); if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently my $now = time; my $filepath = 'tmp/helprequests/'.$now; my @parts=split(/\//,$filepath); my $fullpath = $perlvar{'lonDaemons'}; for (my $i=0;$i<@parts;$i++) { $fullpath .= '/'.$parts[$i]; if ((-e $fullpath)!=1) { mkdir($fullpath,0777); } } open(my $fh,'>'.$fullpath.'/'.$fname); print $fh $ENV{'form.'.$formname}; close($fh); return $fullpath.'/'.$fname; } # Create the directory if not present my $docuname=''; my $docudom=''; my $docuhome=''; $fname="$subdir/$fname"; if ($coursedoc) { $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'}; $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}; $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'}; if ($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 { $docuname=$ENV{'user.name'}; $docudom=$ENV{'user.domain'}; $docuhome=$ENV{'user.home'}; return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname); } } sub finishuserfileupload { my ($docuname,$docudom,$docuhome,$formname,$fname)=@_; my $path=$docudom.'/'.$docuname.'/'; my $filepath=$perlvar{'lonDocRoot'}; my ($fnamepath,$file); $file=$fname; if ($fname=~m|/|) { ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|); $path.=$fnamepath.'/'; } my @parts=split(/\//,$filepath.'/userfiles/'.$path); my $count; for ($count=4;$count<=$#parts;$count++) { $filepath.="/$parts[$count]"; if ((-e $filepath)!=1) { mkdir($filepath,0777); } } # Save the file { open(FH,'>'.$filepath.'/'.$file); print FH $ENV{'form.'.$formname}; close(FH); } # Notify homeserver to grep it # my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome); if ($fetchresult eq 'ok') { # # Return the URL to it return '/uploaded/'.$path.$file; } else { &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome. ': '.$fetchresult); return '/adm/notfound.html'; } } sub removeuploadedurl { my ($url)=@_; my (undef,undef,$udom,$uname,$fname)=split('/',$url,5); return &removeuserfile($uname,$udom,$fname); } sub removeuserfile { my ($docuname,$docudom,$fname)=@_; my $home=&homeserver($docuname,$docudom); return &reply("removeuserfile:$docudom/$docuname/$fname",$home); } sub mkdiruserfile { my ($docuname,$docudom,$dir)=@_; my $home=&homeserver($docuname,$docudom); return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home); } sub renameuserfile { my ($docuname,$docudom,$old,$new)=@_; my $home=&homeserver($docuname,$docudom); return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'. &escape("$new"),$home); } # ------------------------------------------------------------------------- Log sub log { my ($dom,$nam,$hom,$what)=@_; return critical("log:$dom:$nam:$what",$hom); } # ------------------------------------------------------------------ Course Log # # This routine flushes several buffers of non-mission-critical nature # sub flushcourselogs { &logthis('Flushing log buffers'); # # course logs # This is a log of all transactions in a course, which can be used # for data mining purposes # # It also collects the courseid database, which lists last transaction # times and course titles for all courseids # my %courseidbuffer=(); foreach (keys %courselogs) { my $crsid=$_; if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'. &escape($courselogs{$crsid}), $coursehombuf{$crsid}) eq 'ok') { delete $courselogs{$crsid}; } else { &logthis('Failed to flush log buffer for '.$crsid); if (length($courselogs{$crsid})>40000) { &logthis("<font color=blue>WARNING: Buffer for ".$crsid. " exceeded maximum size, deleting.</font>"); delete $courselogs{$crsid}; } } if ($courseidbuffer{$coursehombuf{$crsid}}) { $courseidbuffer{$coursehombuf{$crsid}}.='&'. &escape($crsid).'='.&escape($coursedescrbuf{$crsid}). ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}); } else { $courseidbuffer{$coursehombuf{$crsid}}= &escape($crsid).'='.&escape($coursedescrbuf{$crsid}). ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$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}; } } } # # Roles # Reverse lookup of user roles for course faculty/staff and co-authorship # foreach (keys %userrolehash) { my $entry=$_; my ($role,$uname,$udom,$runame,$rudom,$rsec)= split(/\:/,$entry); if (&Apache::lonnet::put('nohist_userroles', { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} }, $rudom,$runame) eq 'ok') { delete $userrolehash{$entry}; } } $dumpcount++; } sub courselog { my $what=shift; $what=time.':'.$what; unless ($ENV{'request.course.id'}) { return ''; } $coursedombuf{$ENV{'request.course.id'}}= $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}; $coursenumbuf{$ENV{'request.course.id'}}= $ENV{'course.'.$ENV{'request.course.id'}.'.num'}; $coursehombuf{$ENV{'request.course.id'}}= $ENV{'course.'.$ENV{'request.course.id'}.'.home'}; $coursedescrbuf{$ENV{'request.course.id'}}= $ENV{'course.'.$ENV{'request.course.id'}.'.description'}; $courseinstcodebuf{$ENV{'request.course.id'}}= $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'}; $courseownerbuf{$ENV{'request.course.id'}}= $ENV{'course.'.$ENV{'request.course.id'}.'.internal.courseowner'}; if (defined $courselogs{$ENV{'request.course.id'}}) { $courselogs{$ENV{'request.course.id'}}.='&'.$what; } else { $courselogs{$ENV{'request.course.id'}}.=$what; } if (length($courselogs{$ENV{'request.course.id'}})>4048) { &flushcourselogs(); } } sub courseacclog { my $fnsymb=shift; unless ($ENV{'request.course.id'}) { return ''; } my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'}; if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) { $what.=':POST'; # FIXME: Probably ought to escape things.... foreach (keys %ENV) { if ($_=~/^form\.(.*)/) { $what.=':'.$1.'='.$ENV{$_}; } } } elsif ($fnsymb =~ m:^/adm/searchcat:) { # FIXME: We should not be depending on a form parameter that someone # editing lonsearchcat.pm might change in the future. if ($ENV{'form.phase'} eq 'course_search') { $what.= ':POST'; # FIXME: Probably ought to escape things.... foreach my $element ('courseexp','crsfulltext','crsrelated', 'crsdiscuss') { $what.=':'.$element.'='.$ENV{'form.'.$element}; } } } &courselog($what); } sub countacc { my $url=&declutter(shift); return if (! defined($url) || $url eq ''); unless ($ENV{'request.course.id'}) { return ''; } $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1; my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count'; $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 ($username eq '' || $domain eq '') { next; } 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 { 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,$instcodefilter,$ownerfilter,$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).':'. &escape($instcodefilter).':'.&escape($ownerfilter), $tryserver))) { my ($key,$value)=split(/\=/,$_); if (($key) && ($value)) { $returnhash{&unescape($key)}=$value; } } } } } return %returnhash; } # # ----------------------------------------------------------- Check out an item sub get_first_access { my ($type,$argsymb)=@_; my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser(); if ($argsymb) { $symb=$argsymb; } my ($map,$id,$res)=&decode_symb($symb); if ($type eq 'map') { $res=&symbread($map); } else { $res=$symb; } my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname); return $times{"$courseid\0$res"}; } sub set_first_access { my ($type)=@_; my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser(); my ($map,$id,$res)=&decode_symb($symb); if ($type eq 'map') { $res=&symbread($map); } else { $res=$symb; } my $firstaccess=&get_first_access($type,$symb); if (!$firstaccess) { return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname); } return 'already_set'; } sub checkout { my ($symb,$tuname,$tudom,$tcrsid)=@_; my $now=time; my $lonhost=$perlvar{'lonHostID'}; my $infostr=&escape( 'CHECKOUTTOKEN&'. $tuname.'&'. $tudom.'&'. $tcrsid.'&'. $symb.'&'. $now.'&'.$ENV{'REMOTE_ADDR'}); my $token=&reply('tmpput:'.$infostr,$lonhost); if ($token=~/^error\:/) { &logthis("<font color=blue>WARNING: ". "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb. "</font>"); return ''; } $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/; $token=~tr/a-z/A-Z/; my %infohash=('resource.0.outtoken' => $token, 'resource.0.checkouttime' => $now, 'resource.0.outremote' => $ENV{'REMOTE_ADDR'}); unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') { return ''; } else { &logthis("<font color=blue>WARNING: ". "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb. "</font>"); } if (&log($tudom,$tuname,&homeserver($tuname,$tudom), &escape('Checkout '.$infostr.' - '. $token)) ne 'ok') { return ''; } else { &logthis("<font color=blue>WARNING: ". "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb. "</font>"); } return $token; } # ------------------------------------------------------------ Check in an item sub checkin { my $token=shift; my $now=time; my ($ta,$tb,$lonhost)=split(/\*/,$token); $lonhost=~tr/A-Z/a-z/; my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb; $dtoken=~s/\W/\_/g; my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)= split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost))); unless (($tuname) && ($tudom)) { &logthis('Check in '.$token.' ('.$dtoken.') failed'); return ''; } unless (&allowed('mgr',$tcrsid)) { &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '. $ENV{'user.name'}.' - '.$ENV{'user.domain'}); return ''; } my %infohash=('resource.0.intoken' => $token, 'resource.0.checkintime' => $now, 'resource.0.inremote' => $ENV{'REMOTE_ADDR'}); unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') { return ''; } if (&log($tudom,$tuname,&homeserver($tuname,$tudom), &escape('Checkin - '.$token)) ne 'ok') { return ''; } return ($symb,$tuname,$tudom,$tcrsid); } # --------------------------------------------- Set Expire Date for Spreadsheet sub expirespread { my ($uname,$udom,$stype,$usymb)=@_; my $cid=$ENV{'request.course.id'}; if ($cid) { my $now=time; my $key=$uname.':'.$udom.':'.$stype.':'.$usymb; return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'. $ENV{'course.'.$cid.'.num'}. ':nohist_expirationdates:'. &escape($key).'='.$now, $ENV{'course.'.$cid.'.home'}) } return 'ok'; } # ----------------------------------------------------- Devalidate Spreadsheets sub devalidate { my ($symb,$uname,$udom)=@_; my $cid=$ENV{'request.course.id'}; if ($cid) { # delete the stored spreadsheets for # - the student level sheet of this user in course's homespace # - the assessment level sheet for this resource # for this user in user's homespace # - current conditional state info my $key=$uname.':'.$udom.':'; my $status= &del('nohist_calculatedsheets', [$key.'studentcalc:'], $ENV{'course.'.$cid.'.domain'}, $ENV{'course.'.$cid.'.num'}) .' '. &del('nohist_calculatedsheets_'.$cid, [$key.'assesscalc:'.$symb],$udom,$uname); unless ($status eq 'ok ok') { &logthis('Could not devalidate spreadsheet '. $uname.' at '.$udom.' for '. $symb.': '.$status); } &delenv('user.state.'.$cid); } } sub get_scalar { my ($string,$end) = @_; my $value; if ($$string =~ s/^([^&]*?)($end)/$2/) { $value = $1; } elsif ($$string =~ s/^([^&]*?)&//) { $value = $1; } return &unescape($value); } sub array2str { my (@array) = @_; my $result=&arrayref2str(\@array); $result=~s/^__ARRAY_REF__//; $result=~s/__END_ARRAY_REF__$//; return $result; } sub arrayref2str { my ($arrayref) = @_; my $result='__ARRAY_REF__'; foreach my $elem (@$arrayref) { if(ref($elem) eq 'ARRAY') { $result.=&arrayref2str($elem).'&'; } elsif(ref($elem) eq 'HASH') { $result.=&hashref2str($elem).'&'; } elsif(ref($elem)) { #print("Got a ref of ".(ref($elem))." skipping."); } else { $result.=&escape($elem).'&'; } } $result=~s/\&$//; $result .= '__END_ARRAY_REF__'; return $result; } sub hash2str { my (%hash) = @_; my $result=&hashref2str(\%hash); $result=~s/^__HASH_REF__//; $result=~s/__END_HASH_REF__$//; return $result; } sub hashref2str { my ($hashref)=@_; my $result='__HASH_REF__'; foreach (sort(keys(%$hashref))) { if (ref($_) eq 'ARRAY') { $result.=&arrayref2str($_).'='; } elsif (ref($_) eq 'HASH') { $result.=&hashref2str($_).'='; } elsif (ref($_)) { $result.='='; #print("Got a ref of ".(ref($_))." skipping."); } else { if ($_) {$result.=&escape($_).'=';} else { last; } } if(ref($hashref->{$_}) eq 'ARRAY') { $result.=&arrayref2str($hashref->{$_}).'&'; } elsif(ref($hashref->{$_}) eq 'HASH') { $result.=&hashref2str($hashref->{$_}).'&'; } elsif(ref($hashref->{$_})) { $result.='&'; #print("Got a ref of ".(ref($hashref->{$_}))." skipping."); } else { $result.=&escape($hashref->{$_}).'&'; } } $result=~s/\&$//; $result .= '__END_HASH_REF__'; return $result; } sub str2hash { my ($string)=@_; my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__'); return %$hash; } sub str2hashref { my ($string) = @_; my %hash; if($string !~ /^__HASH_REF__/) { if (! ($string eq '' || !defined($string))) { $hash{'error'}='Not hash reference'; } return (\%hash, $string); } $string =~ s/^__HASH_REF__//; while($string !~ /^__END_HASH_REF__/) { #key my $key=''; if($string =~ /^__HASH_REF__/) { ($key, $string)=&str2hashref($string); if(defined($key->{'error'})) { $hash{'error'}='Bad data'; return (\%hash, $string); } } elsif($string =~ /^__ARRAY_REF__/) { ($key, $string)=&str2arrayref($string); if($key->[0] eq 'Array reference error') { $hash{'error'}='Bad data'; return (\%hash, $string); } } else { $string =~ s/^(.*?)=//; $key=&unescape($1); } $string =~ s/^=//; #value my $value=''; if($string =~ /^__HASH_REF__/) { ($value, $string)=&str2hashref($string); if(defined($value->{'error'})) { $hash{'error'}='Bad data'; return (\%hash, $string); } } elsif($string =~ /^__ARRAY_REF__/) { ($value, $string)=&str2arrayref($string); if($value->[0] eq 'Array reference error') { $hash{'error'}='Bad data'; return (\%hash, $string); } } else { $value=&get_scalar(\$string,'__END_HASH_REF__'); } $string =~ s/^&//; $hash{$key}=$value; } $string =~ s/^__END_HASH_REF__//; return (\%hash, $string); } sub str2array { my ($string)=@_; my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__'); return @$array; } sub str2arrayref { my ($string) = @_; my @array; if($string !~ /^__ARRAY_REF__/) { if (! ($string eq '' || !defined($string))) { $array[0]='Array reference error'; } return (\@array, $string); } $string =~ s/^__ARRAY_REF__//; while($string !~ /^__END_ARRAY_REF__/) { my $value=''; if($string =~ /^__HASH_REF__/) { ($value, $string)=&str2hashref($string); if(defined($value->{'error'})) { $array[0] ='Array reference error'; return (\@array, $string); } } elsif($string =~ /^__ARRAY_REF__/) { ($value, $string)=&str2arrayref($string); if($value->[0] eq 'Array reference error') { $array[0] ='Array reference error'; return (\@array, $string); } } else { $value=&get_scalar(\$string,'__END_ARRAY_REF__'); } $string =~ s/^&//; push(@array, $value); } $string =~ s/^__END_ARRAY_REF__//; return (\@array, $string); } # -------------------------------------------------------------------Temp Store sub tmpreset { my ($symb,$namespace,$domain,$stuname) = @_; if (!$symb) { $symb=&symbread(); if (!$symb) { $symb= $ENV{'request.url'}; } } $symb=escape($symb); if (!$namespace) { $namespace=$ENV{'request.state'}; } $namespace=~s/\//\_/g; $namespace=~s/\W//g; if (!$domain) { $domain=$ENV{'user.domain'}; } if (!$stuname) { $stuname=$ENV{'user.name'}; } if ($domain eq 'public' && $stuname eq 'public') { $stuname=$ENV{'REMOTE_ADDR'}; } my $path=$perlvar{'lonDaemons'}.'/tmp'; my %hash; if (tie(%hash,'GDBM_File', $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db', &GDBM_WRCREAT(),0640)) { foreach my $key (keys %hash) { if ($key=~ /:$symb/) { delete($hash{$key}); } } } } sub tmpstore { my ($storehash,$symb,$namespace,$domain,$stuname) = @_; if (!$symb) { $symb=&symbread(); if (!$symb) { $symb= $ENV{'request.url'}; } } $symb=escape($symb); if (!$namespace) { # I don't think we would ever want to store this for a course. # it seems this will only be used if we don't have a course. #$namespace=$ENV{'request.course.id'}; #if (!$namespace) { $namespace=$ENV{'request.state'}; #} } $namespace=~s/\//\_/g; $namespace=~s/\W//g; if (!$domain) { $domain=$ENV{'user.domain'}; } if (!$stuname) { $stuname=$ENV{'user.name'}; } if ($domain eq 'public' && $stuname eq 'public') { $stuname=$ENV{'REMOTE_ADDR'}; } my $now=time; my %hash; my $path=$perlvar{'lonDaemons'}.'/tmp'; if (tie(%hash,'GDBM_File', $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db', &GDBM_WRCREAT(),0640)) { $hash{"version:$symb"}++; my $version=$hash{"version:$symb"}; my $allkeys=''; foreach my $key (keys(%$storehash)) { $allkeys.=$key.':'; $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key}); } $hash{"$version:$symb:timestamp"}=$now; $allkeys.='timestamp'; $hash{"$version:keys:$symb"}=$allkeys; if (untie(%hash)) { return 'ok'; } else { return "error:$!"; } } else { return "error:$!"; } } # -----------------------------------------------------------------Temp Restore sub tmprestore { my ($symb,$namespace,$domain,$stuname) = @_; if (!$symb) { $symb=&symbread(); if (!$symb) { $symb= $ENV{'request.url'}; } } $symb=escape($symb); if (!$namespace) { $namespace=$ENV{'request.state'}; } if (!$domain) { $domain=$ENV{'user.domain'}; } if (!$stuname) { $stuname=$ENV{'user.name'}; } if ($domain eq 'public' && $stuname eq 'public') { $stuname=$ENV{'REMOTE_ADDR'}; } my %returnhash; $namespace=~s/\//\_/g; $namespace=~s/\W//g; my %hash; my $path=$perlvar{'lonDaemons'}.'/tmp'; if (tie(%hash,'GDBM_File', $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db', &GDBM_READER(),0640)) { my $version=$hash{"version:$symb"}; $returnhash{'version'}=$version; my $scope; for ($scope=1;$scope<=$version;$scope++) { my $vkeys=$hash{"$scope:keys:$symb"}; my @keys=split(/:/,$vkeys); my $key; $returnhash{"$scope:keys"}=$vkeys; foreach $key (@keys) { $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"}); $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"}); } } if (!(untie(%hash))) { return "error:$!"; } } else { return "error:$!"; } return %returnhash; } # ----------------------------------------------------------------------- Store sub store { my ($storehash,$symb,$namespace,$domain,$stuname) = @_; my $home=''; if ($stuname) { $home=&homeserver($stuname,$domain); } $symb=&symbclean($symb); if (!$symb) { unless ($symb=&symbread()) { return ''; } } if (!$domain) { $domain=$ENV{'user.domain'}; } if (!$stuname) { $stuname=$ENV{'user.name'}; } &devalidate($symb,$stuname,$domain); $symb=escape($symb); if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } } if (!$home) { $home=$ENV{'user.home'}; } $$storehash{'ip'}=$ENV{'REMOTE_ADDR'}; $$storehash{'host'}=$perlvar{'lonHostID'}; my $namevalue=''; foreach (keys %$storehash) { $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&'; } $namevalue=~s/\&$//; &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue); return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home"); } # -------------------------------------------------------------- Critical Store sub cstore { my ($storehash,$symb,$namespace,$domain,$stuname) = @_; my $home=''; if ($stuname) { $home=&homeserver($stuname,$domain); } $symb=&symbclean($symb); if (!$symb) { unless ($symb=&symbread()) { return ''; } } if (!$domain) { $domain=$ENV{'user.domain'}; } if (!$stuname) { $stuname=$ENV{'user.name'}; } &devalidate($symb,$stuname,$domain); $symb=escape($symb); if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } } if (!$home) { $home=$ENV{'user.home'}; } $$storehash{'ip'}=$ENV{'REMOTE_ADDR'}; $$storehash{'host'}=$perlvar{'lonHostID'}; my $namevalue=''; foreach (keys %$storehash) { $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&'; } $namevalue=~s/\&$//; &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue); return critical ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home"); } # --------------------------------------------------------------------- Restore sub restore { my ($symb,$namespace,$domain,$stuname) = @_; my $home=''; if ($stuname) { $home=&homeserver($stuname,$domain); } if (!$symb) { unless ($symb=escape(&symbread())) { return ''; } } else { $symb=&escape(&symbclean($symb)); } if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } } if (!$domain) { $domain=$ENV{'user.domain'}; } if (!$stuname) { $stuname=$ENV{'user.name'}; } if (!$home) { $home=$ENV{'user.home'}; } my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home"); my %returnhash=(); foreach (split(/\&/,$answer)) { my ($name,$value)=split(/\=/,$_); $returnhash{&unescape($name)}=&thaw_unescape($value); } my $version; for ($version=1;$version<=$returnhash{'version'};$version++) { foreach (split(/\:/,$returnhash{$version.':keys'})) { $returnhash{$_}=$returnhash{$version.':'.$_}; } } return %returnhash; } # ---------------------------------------------------------- Course Description sub coursedescription { my $courseid=shift; $courseid=~s/^\///; $courseid=~s/\_/\//g; my ($cdomain,$cnum)=split(/\//,$courseid); my $chome=&homeserver($cnum,$cdomain); my $normalid=$cdomain.'_'.$cnum; # need to always cache even if we get errors otherwise we keep # trying and trying and trying to get the course description. my %envhash=(); my %returnhash=(); $envhash{'course.'.$normalid.'.last_cache'}=time; if ($chome ne 'no_host') { %returnhash=&dump('environment',$cdomain,$cnum); if (!exists($returnhash{'con_lost'})) { $returnhash{'home'}= $chome; $returnhash{'domain'} = $cdomain; $returnhash{'num'} = $cnum; while (my ($name,$value) = each %returnhash) { $envhash{'course.'.$normalid.'.'.$name}=$value; } $returnhash{'url'}=&clutter($returnhash{'url'}); $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'. $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum; $envhash{'course.'.$normalid.'.home'}=$chome; $envhash{'course.'.$normalid.'.domain'}=$cdomain; $envhash{'course.'.$normalid.'.num'}=$cnum; } } &appenv(%envhash); return %returnhash; } # -------------------------------------------------See if a user is privileged sub privileged { my ($username,$domain)=@_; my $rolesdump=&reply("dump:$domain:$username:roles", &homeserver($username,$domain)); if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; } my $now=time; if ($rolesdump ne '') { foreach (split(/&/,$rolesdump)) { if ($_!~/^rolesdef_/) { my ($area,$role)=split(/=/,$_); $area=~s/\_\w\w$//; my ($trole,$tend,$tstart)=split(/_/,$role); if (($trole eq 'dc') || ($trole eq 'su')) { my $active=1; if ($tend) { if ($tend<$now) { $active=0; } } if ($tstart) { if ($tstart>$now) { $active=0; } } if ($active) { return 1; } } } } } return 0; } # -------------------------------------------------------- Get user privileges sub rolesinit { my ($domain,$username,$authhost)=@_; my $rolesdump=reply("dump:$domain:$username:roles",$authhost); if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; } my %allroles=(); my $now=time; my $userroles="user.login.time=$now\n"; if ($rolesdump ne '') { foreach (split(/&/,$rolesdump)) { if ($_!~/^rolesdef_/) { my ($area,$role)=split(/=/,$_); $area=~s/\_\w\w$//; my ($trole,$tend,$tstart); if ($role=~/^cr/) { ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|); ($tend,$tstart)=split('_',$trest); } else { ($trole,$tend,$tstart)=split(/_/,$role); } $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username); if (($tend!=0) && ($tend<$now)) { $trole=''; } if (($tstart!=0) && ($tstart>$now)) { $trole=''; } if (($area ne '') && ($trole ne '')) { my $spec=$trole.'.'.$area; my ($tdummy,$tdomain,$trest)=split(/\//,$area); if ($trole =~ /^cr\//) { &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area); } else { &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area); } } } } my ($author,$adv) = &set_userprivs(\$userroles,\%allroles); $userroles.='user.adv='.$adv."\n". 'user.author='.$author."\n"; $ENV{'user.adv'}=$adv; } return $userroles; } sub set_arearole { my ($trole,$area,$tstart,$tend,$domain,$username) = @_; # log the associated role with the area &userrolelog($trole,$username,$domain,$area,$tstart,$tend); return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n"; } sub custom_roleprivs { my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_; my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole); my $homsvr=homeserver($rauthor,$rdomain); if ($hostname{$homsvr} ne '') { my ($rdummy,$roledef)= &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor); if (($rdummy ne 'con_lost') && ($roledef ne '')) { my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef); if (defined($syspriv)) { $$allroles{'cm./'}.=':'.$syspriv; $$allroles{$spec.'./'}.=':'.$syspriv; } if ($tdomain ne '') { if (defined($dompriv)) { $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv; $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv; } if (($trest ne '') && (defined($coursepriv))) { $$allroles{'cm.'.$area}.=':'.$coursepriv; $$allroles{$spec.'.'.$area}.=':'.$coursepriv; } } } } } sub standard_roleprivs { my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_; if (defined($pr{$trole.':s'})) { $$allroles{'cm./'}.=':'.$pr{$trole.':s'}; $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'}; } if ($tdomain ne '') { if (defined($pr{$trole.':d'})) { $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; } if (($trest ne '') && (defined($pr{$trole.':c'}))) { $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'}; $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'}; } } } sub set_userprivs { my ($userroles,$allroles) = @_; my $author=0; my $adv=0; foreach (keys %{$allroles}) { my %thesepriv=(); if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; } foreach (split(/:/,$$allroles{$_})) { if ($_ ne '') { my ($privilege,$restrictions)=split(/&/,$_); if ($restrictions eq '') { $thesepriv{$privilege}='F'; } elsif ($thesepriv{$privilege} ne 'F') { $thesepriv{$privilege}.=$restrictions; } if ($thesepriv{'adv'} eq 'F') { $adv=1; } } } my $thesestr=''; foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } $$userroles.='user.priv.'.$_.'='.$thesestr."\n"; } return ($author,$adv); } # --------------------------------------------------------------- get interface sub get { my ($namespace,$storearr,$udomain,$uname)=@_; my $items=''; foreach (@$storearr) { $items.=escape($_).'&'; } $items=~s/\&$//; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome); my @pairs=split(/\&/,$rep); if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) { return @pairs; } my %returnhash=(); my $i=0; foreach (@$storearr) { $returnhash{$_}=&thaw_unescape($pairs[$i]); $i++; } return %returnhash; } # --------------------------------------------------------------- del interface sub del { my ($namespace,$storearr,$udomain,$uname)=@_; my $items=''; foreach (@$storearr) { $items.=escape($_).'&'; } $items=~s/\&$//; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); return &reply("del:$udomain:$uname:$namespace:$items",$uhome); } # -------------------------------------------------------------- dump interface sub dump { my ($namespace,$udomain,$uname,$regexp)=@_; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); if ($regexp) { $regexp=&escape($regexp); } else { $regexp='.'; } my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome); my @pairs=split(/\&/,$rep); my %returnhash=(); foreach (@pairs) { my ($key,$value)=split(/=/,$_); $returnhash{unescape($key)}=&thaw_unescape($value); } return %returnhash; } # -------------------------------------------------------------- keys interface sub getkeys { my ($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($_)); } return @keyarray; } # --------------------------------------------------------------- currentdump sub currentdump { my ($courseid,$sdom,$sname)=@_; $courseid = $ENV{'request.course.id'} if (! defined($courseid)); $sdom = $ENV{'user.domain'} if (! defined($sdom)); $sname = $ENV{'user.name'} if (! defined($sname)); my $uhome = &homeserver($sname,$sdom); my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome); return if ($rep =~ /^(error:|no_such_host)/); # my %returnhash=(); # if ($rep eq "unknown_cmd") { # an old lond will not know currentdump # Do a dump and make it look like a currentdump my @tmp = &dump($courseid,$sdom,$sname,'.'); return if ($tmp[0] =~ /^(error:|no_such_host)/); my %hash = @tmp; @tmp=(); %returnhash = %{&convert_dump_to_currentdump(\%hash)}; } else { my @pairs=split(/\&/,$rep); foreach (@pairs) { my ($key,$value)=split(/=/,$_); my ($symb,$param) = split(/:/,$key); $returnhash{&unescape($symb)}->{&unescape($param)} = &thaw_unescape($value); } } 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($$store).'=&'; } elsif (ref($store) eq 'ARRAY') { $items = join('=&',map {&escape($_);} @{$store}); } elsif (ref($store) eq 'HASH') { while (my($key,$value) = each(%{$store})) { $items.= &escape($key).'='.&escape($value).'&'; } } $items=~s/\&$//; return &reply("inc:$udomain:$uname:$namespace:$items",$uhome); } # --------------------------------------------------------------- put interface sub put { my ($namespace,$storehash,$udomain,$uname)=@_; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); my $items=''; foreach (keys %$storehash) { $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&'; } $items=~s/\&$//; return &reply("put:$udomain:$uname:$namespace:$items",$uhome); } # ---------------------------------------------------------- putstore interface sub putstore { my ($namespace,$storehash,$udomain,$uname)=@_; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); my $items=''; my %allitems = (); foreach (keys %$storehash) { if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) { my $key = $1.':keys:'.$2; $allitems{$key} .= $3.':'; } $items.=$_.'='.&freeze_escape($$storehash{$_}).'&'; } foreach (keys %allitems) { $allitems{$_} =~ s/\:$//; $items.= $_.'='.$allitems{$_}.'&'; } $items=~s/\&$//; return &reply("put:$udomain:$uname:$namespace:$items",$uhome); } # ------------------------------------------------------ critical put interface sub cput { my ($namespace,$storehash,$udomain,$uname)=@_; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); my $items=''; foreach (keys %$storehash) { $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&'; } $items=~s/\&$//; return &critical("put:$udomain:$uname:$namespace:$items",$uhome); } # -------------------------------------------------------------- eget interface sub eget { my ($namespace,$storearr,$udomain,$uname)=@_; my $items=''; foreach (@$storearr) { $items.=escape($_).'&'; } $items=~s/\&$//; if (!$udomain) { $udomain=$ENV{'user.domain'}; } if (!$uname) { $uname=$ENV{'user.name'}; } my $uhome=&homeserver($uname,$udomain); my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome); my @pairs=split(/\&/,$rep); my %returnhash=(); my $i=0; foreach (@$storearr) { $returnhash{$_}=&thaw_unescape($pairs[$i]); $i++; } return %returnhash; } # ---------------------------------------------- Custom access rule evaluation sub customaccess { my ($priv,$uri)=@_; my ($urole,$urealm)=split(/\./,$ENV{'request.role'}); $urealm=~s/^\W//; my ($udom,$ucrs,$usec)=split(/\//,$urealm); my $access=0; foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) { my ($effect,$realm,$role)=split(/\:/,$_); if ($role) { if ($role ne $urole) { next; } } foreach (split(/\s*\,\s*/,$realm)) { my ($tdom,$tcrs,$tsec)=split(/\_/,$_); if ($tdom) { if ($tdom ne $udom) { next; } } if ($tcrs) { if ($tcrs ne $ucrs) { next; } } if ($tsec) { if ($tsec ne $usec) { next; } } $access=($effect eq 'allow'); last; } if ($realm eq '' && $role eq '') { $access=($effect eq 'allow'); } } return $access; } # ------------------------------------------------- Check for a user privilege sub allowed { my ($priv,$uri,$symb)=@_; $uri=&deversion($uri); my $orguri=$uri; $uri=&declutter($uri); if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; } # Free bre access to adm and meta resources if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|)) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) { return 'F'; } # Free bre access to user's own portfolio contents my ($space,$domain,$name,$dir)=split('/',$uri); if (($space=~/^(uploaded|ediupload)$/) && ($ENV{'user.name'} eq $name) && ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) { return 'F'; } # Free bre to public access if ($priv eq 'bre') { my $copyright=&metadata($uri,'copyright'); if (($copyright eq 'public') && (!$ENV{'request.course.id'})) { return 'F'; } if ($copyright eq 'priv') { $uri=~/([^\/]+)\/([^\/]+)\//; unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) { return ''; } } if ($copyright eq 'domain') { $uri=~/([^\/]+)\/([^\/]+)\//; unless (($ENV{'user.domain'} eq $1) || ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) { return ''; } } if ($ENV{'request.role'}=~ /li\.\//) { # Library role, so allow browsing of resources in this domain. return 'F'; } if ($copyright eq 'custom') { unless (&customaccess($priv,$uri)) { return ''; } } } # Domain coordinator is trying to create a course if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) { # uri is the requested domain in this case. # comparison to 'request.role.domain' shows if the user has selected # a role of dc for the domain in question. return 'F' if ($uri eq $ENV{'request.role.domain'}); } my $thisallowed=''; my $statecond=0; my $courseprivid=''; # Course if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) { $thisallowed.=$1; } # Domain if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'} =~/\Q$priv\E\&([^\:]*)/) { $thisallowed.=$1; } # Course: uri itself is a course my $courseuri=$uri; $courseuri=~s/\_(\d)/\/$1/; $courseuri=~s/^([^\/])/\/$1/; if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri} =~/\Q$priv\E\&([^\:]*)/) { $thisallowed.=$1; } # URI is an uploaded document for this course # not allowing 'edit' access (editupload) to uploaded course docs if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) { my $refuri=$ENV{'httpref.'.$orguri}; if ($refuri) { if ($refuri =~ m|^/adm/|) { $thisallowed='F'; } } } # Full access at system, domain or course-wide level? Exit. if ($thisallowed=~/F/) { return 'F'; } # 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:'=~/\:\Q$priv\E\:/) { return $thisallowed; } # # Gathered so far: system, domain and course wide privileges # # Course: See if uri or referer is an individual resource that is part of # the course if ($ENV{'request.course.id'}) { $courseprivid=$ENV{'request.course.id'}; if ($ENV{'request.course.sec'}) { $courseprivid.='/'.$ENV{'request.course.sec'}; } $courseprivid=~s/\_/\//; my $checkreferer=1; my ($match,$cond)=&is_on_map($uri); if ($match) { $statecond=$cond; if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid} =~/\Q$priv\E\&([^\:]*)/) { $thisallowed.=$1; $checkreferer=0; } } if ($checkreferer) { my $refuri=$ENV{'httpref.'.$orguri}; unless ($refuri) { foreach (keys %ENV) { if ($_=~/^httpref\..*\*/) { my $pattern=$_; $pattern=~s/^httpref\.\/res\///; $pattern=~s/\*/\[\^\/\]\+/g; $pattern=~s/\//\\\//g; if ($orguri=~/$pattern/) { $refuri=$ENV{$_}; } } } } if ($refuri) { $refuri=&declutter($refuri); my ($match,$cond)=&is_on_map($refuri); if ($match) { my $refstatecond=$cond; if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid} =~/\Q$priv\E\&([^\:]*)/) { $thisallowed.=$1; $uri=$refuri; $statecond=$refstatecond; } } } } } # # Gathered now: all privileges that could apply, and condition number # # # Full or no access? # if ($thisallowed=~/F/) { return 'F'; } unless ($thisallowed) { return ''; } # Restrictions exist, deal with them # # C:according to course preferences # R:according to resource settings # L:unless locked # X:according to user session state # # Possibly locked functionality, check all courses # Locks might take effect only after 10 minutes cache expiration for other # courses, and 2 minutes for current course my $envkey; if ($thisallowed=~/L/) { foreach $envkey (keys %ENV) { if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) { my $courseid=$2; my $roleid=$1.'.'.$2; $courseid=~s/^\///; my $expiretime=600; if ($ENV{'request.role'} eq $roleid) { $expiretime=120; } my ($cdom,$cnum,$csec)=split(/\//,$courseid); my $prefix='course.'.$cdom.'_'.$cnum.'.'; if ((time-$ENV{$prefix.'last_cache'})>$expiretime) { &coursedescription($courseid); } if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/) || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) { if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) { &log($ENV{'user.domain'},$ENV{'user.name'}, $ENV{'user.home'}, 'Locked by res: '.$priv.' for '.$uri.' due to '. $cdom.'/'.$cnum.'/'.$csec.' expire '. $ENV{$prefix.'priv.'.$priv.'.lock.expire'}); return ''; } } if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/) || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) { if ($ENV{'priv.'.$priv.'.lock.expire'}>time) { &log($ENV{'user.domain'},$ENV{'user.name'}, $ENV{'user.home'}, 'Locked by priv: '.$priv.' for '.$uri.' due to '. $cdom.'/'.$cnum.'/'.$csec.' expire '. $ENV{$prefix.'priv.'.$priv.'.lock.expire'}); return ''; } } } } } # # Rest of the restrictions depend on selected course # unless ($ENV{'request.course.id'}) { return '1'; } # # Now user is definitely in a course # # Course preferences if ($thisallowed=~/C/) { my $rolecode=(split(/\./,$ENV{'request.role'}))[0]; my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'}; if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'} =~/\Q$rolecode\E/) { &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'}, 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '. $ENV{'request.course.id'}); return ''; } if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'} =~/\Q$unamedom\E/) { &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'}, 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '. $ENV{'request.course.id'}); return ''; } } # Resource preferences if ($thisallowed=~/R/) { my $rolecode=(split(/\./,$ENV{'request.role'}))[0]; if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) { &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'}, 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode); return ''; } } # Restricted by state or randomout? if ($thisallowed=~/X/) { if ($ENV{'acc.randomout'}) { if (!$symb) { $symb=&symbread($uri,1); } if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) { return ''; } } if (&condval($statecond)) { return '2'; } else { return ''; } } return 'F'; } # --------------------------------------------------- Is a resource on the map? sub is_on_map { my $uri=&declutter(shift); $uri=~s/\.\d+\.(\w+)$/\.$1/; my @uriparts=split(/\//,$uri); my $filename=$uriparts[$#uriparts]; my $pathname=$uri; $pathname=~s|/\Q$filename\E$||; $pathname=~s/^adm\/wrapper\///; #Trying to find the conditional for the file my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~ /\&\Q$filename\E\:([\d\|]+)\&/); if ($match) { return (1,$1); } else { return (0,0); } } # --------------------------------------------------------- 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 $aliassymb; } # ----------------------------------------------------------------- Define Role sub definerole { if (allowed('mcr','/')) { my ($rolename,$sysrole,$domrole,$courole)=@_; foreach (split(':',$sysrole)) { my ($crole,$cqual)=split(/\&/,$_); if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; } if ($pr{'cr:s'}=~/\Q$crole\E\&/) { if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) { return "refused:s:$crole&$cqual"; } } } foreach (split(':',$domrole)) { my ($crole,$cqual)=split(/\&/,$_); if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; } if ($pr{'cr:d'}=~/\Q$crole\E\&/) { if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) { return "refused:d:$crole&$cqual"; } } } foreach (split(':',$courole)) { my ($crole,$cqual)=split(/\&/,$_); if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; } if ($pr{'cr:c'}=~/\Q$crole\E\&/) { if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) { return "refused:c:$crole&$cqual"; } } } my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:". "$ENV{'user.domain'}:$ENV{'user.name'}:". "rolesdef_$rolename=". escape($sysrole.'_'.$domrole.'_'.$courole); return reply($command,$ENV{'user.home'}); } else { return 'refused'; } } # ---------------- Make a metadata query against the network of library servers sub metadata_query { my ($query,$custom,$customshow,$server_array)=@_; my %rhash; my @server_list = (defined($server_array) ? @$server_array : keys(%libserv) ); for my $server (@server_list) { unless ($custom or $customshow) { my $reply=&reply("querysend:".&escape($query),$server); $rhash{$server}=$reply; } else { my $reply=&reply("querysend:".&escape($query).':'. &escape($custom).':'.&escape($customshow), $server); $rhash{$server}=$reply; } } return \%rhash; } # ----------------------------------------- Send log queries and wait for reply sub log_query { my ($uname,$udom,$query,%filters)=@_; my $uhome=&homeserver($uname,$udom); if ($uhome eq 'no_host') { return 'error: no_host'; } my $uhost=$hostname{$uhome}; my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters)); my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command, $uhome); unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; } return get_query_reply($queryid); } # ------- Request retrieval of institutional classlists for course(s) sub fetch_enrollment_query { my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_; my $homeserver; my $maxtries = 1; if ($context eq 'automated') { $homeserver = $perlvar{'lonHostID'}; $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout } else { $homeserver = &homeserver($cnum,$dom); } my $host=$hostname{$homeserver}; my $cmd = ''; foreach (keys %{$affiliatesref}) { $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%'; } $cmd =~ s/%%$//; $cmd = &escape($cmd); my $query = 'fetchenrollment'; my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver); unless ($queryid=~/^\Q$host\E\_/) { &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum); return 'error: '.$queryid; } my $reply = &get_query_reply($queryid); my $tries = 1; while (($reply=~/^timeout/) && ($tries < $maxtries)) { $reply = &get_query_reply($queryid); $tries ++; } if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) { &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries); } else { my @responses = split/:/,$reply; if ($homeserver eq $perlvar{'lonHostID'}) { foreach (@responses) { my ($key,$value) = split/=/,$_; $$replyref{$key} = $value; } } else { my $pathname = $perlvar{'lonDaemons'}.'/tmp'; foreach (@responses) { my ($key,$value) = split/=/,$_; $$replyref{$key} = $value; if ($value > 0) { foreach (@{$$affiliatesref{$key}}) { my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml'; my $destname = $pathname.'/'.$filename; my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver); if ($xml_classlist =~ /^error/) { &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum); } else { if ( open(FILE,">$destname") ) { print FILE &unescape($xml_classlist); close(FILE); } else { &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum); } } } } } } return 'ok'; } return 'error'; } sub get_query_reply { my $queryid=shift; my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid; my $reply=''; for (1..100) { sleep 2; if (-e $replyfile.'.end') { if (open(my $fh,$replyfile)) { $reply.=<$fh>; close($fh); } else { return 'error: reply_file_error'; } return &unescape($reply); } } return 'timeout:'.$queryid; } sub courselog_query { # # possible filters: # url: url or symb # username # domain # action: view, submit, grade # start: timestamp # end: timestamp # my (%filters)=@_; unless ($ENV{'request.course.id'}) { return 'no_course'; } if ($filters{'url'}) { $filters{'url'}=&symbclean(&declutter($filters{'url'})); $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/; $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/; } my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'}; my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}; return &log_query($cname,$cdom,'courselog',%filters); } sub userlog_query { my ($uname,$udom,%filters)=@_; return &log_query($uname,$udom,'userlog',%filters); } #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course sub auto_run { my ($cnum,$cdom) = @_; my $homeserver = &homeserver($cnum,$cdom); my $response = &reply('autorun:'.$cdom,$homeserver); return $response; } sub auto_get_sections { my ($cnum,$cdom,$inst_coursecode) = @_; my $homeserver = &homeserver($cnum,$cdom); my @secs = (); my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver)); unless ($response eq 'refused') { @secs = split/:/,$response; } return @secs; } sub auto_new_course { my ($cnum,$cdom,$inst_course_id,$owner) = @_; my $homeserver = &homeserver($cnum,$cdom); my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver)); return $response; } sub auto_validate_courseID { my ($cnum,$cdom,$inst_course_id) = @_; my $homeserver = &homeserver($cnum,$cdom); my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver)); return $response; } sub auto_create_password { my ($cnum,$cdom,$authparam) = @_; my $homeserver = &homeserver($cnum,$cdom); my $create_passwd = 0; my $authchk = ''; my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver)); if ($response eq 'refused') { $authchk = 'refused'; } else { ($authparam,$create_passwd,$authchk) = split/:/,$response; } return ($authparam,$create_passwd,$authchk); } sub auto_instcode_format { my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_; my $courses = ''; my $homeserver; if ($caller eq 'global') { foreach my $tryserver (keys %libserv) { if ($hostdom{$tryserver} eq $codedom) { $homeserver = $tryserver; last; } } if (($ENV{'user.name'}) && ($ENV{'user.domain'} eq $codedom)) { $homeserver = &homeserver($ENV{'user.name'},$codedom); } } else { $homeserver = &homeserver($caller,$codedom); } foreach (keys %{$instcodes}) { $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&'; } chop($courses); my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver); unless ($response =~ /(con_lost|error|no_such_host|refused)/) { my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response; %{$codes} = &str2hash($codes_str); @{$codetitles} = &str2array($codetitles_str); %{$cat_titles} = &str2hash($cat_titles_str); %{$cat_order} = &str2hash($cat_order_str); return 'ok'; } return $response; } # ------------------------------------------------------------------ Plain Text sub plaintext { my $short=shift; return &mt($prp{$short}); } # ----------------------------------------------------------------- Assign Role sub assignrole { my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_; my $mrole; if ($role =~ /^cr\//) { my $cwosec=$url; $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/; unless (&allowed('ccr',$cwosec)) { &logthis('Refused custom assignrole: '. $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '. $ENV{'user.name'}.' at '.$ENV{'user.domain'}); return 'refused'; } $mrole='cr'; } else { my $cwosec=$url; $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/; unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) { &logthis('Refused assignrole: '. $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '. $ENV{'user.name'}.' at '.$ENV{'user.domain'}); return 'refused'; } $mrole=$role; } my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:". "$udom:$uname:$url".'_'."$mrole=$role"; if ($end) { $command.='_'.$end; } if ($start) { if ($end) { $command.='_'.$start; } else { $command.='_0_'.$start; } } # 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 # Overrides without validation sub modifyuserauth { my ($udom,$uname,$umode,$upass)=@_; my $uhome=&homeserver($uname,$udom); unless (&allowed('mau',$udom)) { return 'refused'; } &logthis('Call to modify user authentication '.$udom.', '.$uname.', '. $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}. ' in domain '.$ENV{'request.role.domain'}); my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'. &escape($upass),$uhome); &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'}, 'Authentication changed for '.$udom.', '.$uname.', '.$umode. '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply); &log($udom,,$uname,$uhome, 'Authentication changed by '.$ENV{'user.domain'}.', '. $ENV{'user.name'}.', '.$umode. '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply); unless ($reply eq 'ok') { &logthis('Authentication mode error: '.$reply); return 'error: '.$reply; } return 'ok'; } # --------------------------------------------------------------- Modify a user sub modifyuser { my ($udom, $uname, $uid, $umode, $upass, $first, $middle, $last, $gene, $forceid, $desiredhome, $email)=@_; $udom=~s/\W//g; $uname=~s/\W//g; &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '. $umode.', '.$first.', '.$middle.', '. $last.', '.$gene.'(forceid: '.$forceid.')'. (defined($desiredhome) ? ' desiredhome = '.$desiredhome : ' desiredhome not specified'). ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}. ' in domain '.$ENV{'request.role.domain'}); my $uhome=&homeserver($uname,$udom,'true'); # ----------------------------------------------------------------- Create User if (($uhome eq 'no_host') && (($umode && $upass) || ($umode eq 'localauth'))) { my $unhome=''; if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) { $unhome = $desiredhome; } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) { $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'}; } else { # load balancing routine for determining $unhome my $tryserver; my $loadm=10000000; foreach $tryserver (keys %libserv) { if ($hostdom{$tryserver} eq $udom) { my $answer=reply('load',$tryserver); if (($answer=~/\d+/) && ($answer<$loadm)) { $loadm=$answer; $unhome=$tryserver; } } } } if (($unhome eq '') || ($unhome eq 'no_host')) { return 'error: unable to find a home server for '.$uname. ' in domain '.$udom; } my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'. &escape($upass),$unhome); unless ($reply eq 'ok') { return 'error: '.$reply; } $uhome=&homeserver($uname,$udom,'true'); if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) { return 'error: unable verify users home machine.'; } } # End of creation of new user # ---------------------------------------------------------------------- Add ID if ($uid) { $uid=~tr/A-Z/a-z/; my %uidhash=&idrget($udom,$uname); if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/) && (!$forceid)) { unless ($uid eq $uidhash{$uname}) { return 'error: user id "'.$uid.'" does not match '. 'current user id "'.$uidhash{$uname}.'".'; } } else { &idput($udom,($uname => $uid)); } } # -------------------------------------------------------------- Add names, etc my @tmp=&get('environment', ['firstname','middlename','lastname','generation'], $udom,$uname); my %names; if ($tmp[0] =~ m/^error:.*/) { %names=(); } else { %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 (defined($middle)) { $names{'middlename'} = $middle; } if ($last) { $names{'lastname'} = $last; } if (defined($gene)) { $names{'generation'} = $gene; } if ($email) { $email=~s/[^\w\@\.\-\,]//gs; if ($email=~/\@/) { $names{'notification'} = $email; $names{'critnotification'} = $email; $names{'permanentemail'} = $email; } } my $reply = &put('environment', \%names, $udom,$uname); if ($reply ne 'ok') { return 'error: '.$reply; } &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '. $umode.', '.$first.', '.$middle.', '. $last.', '.$gene.' by '. $ENV{'user.name'}.' at '.$ENV{'user.domain'}); return 'ok'; } # -------------------------------------------------------------- Modify student sub modifystudent { my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec, $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_; if (!$cid) { unless ($cid=$ENV{'request.course.id'}) { return 'not_in_class'; } } # --------------------------------------------------------------- Make the user my $reply=&modifyuser ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid, $desiredhome,$email); unless ($reply eq 'ok') { return $reply; } # This will cause &modify_student_enrollment to get the uid from the # students environment $uid = undef if (!$forceid); $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last, $gene,$usec,$end,$start,$type,$locktype,$cid); return $reply; } sub modify_student_enrollment { my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_; my ($cdom,$cnum,$chome); if (!$cid) { unless ($cid=$ENV{'request.course.id'}) { return 'not_in_class'; } $cdom=$ENV{'course.'.$cid.'.domain'}; $cnum=$ENV{'course.'.$cid.'.num'}; } else { ($cdom,$cnum)=split(/_/,$cid); } $chome=$ENV{'course.'.$cid.'.home'}; if (!$chome) { $chome=&homeserver($cnum,$cdom); } if (!$chome) { return 'unknown_course'; } # Make sure the user exists my $uhome=&homeserver($uname,$udom); if (($uhome eq '') || ($uhome eq 'no_host')) { return 'error: no such user'; } # Get student data if we were not given enough information if (!defined($first) || $first eq '' || !defined($last) || $last eq '' || !defined($uid) || $uid eq '' || !defined($middle) || $middle eq '' || !defined($gene) || $gene eq '') { # They did not supply us with enough data to enroll the student, so # we need to pick up more information. my %tmp = &get('environment', ['firstname','middlename','lastname', 'generation','id'] ,$udom,$uname); #foreach (keys(%tmp)) { # &logthis("key $_ = ".$tmp{$_}); #} $first = $tmp{'firstname'} if (!defined($first) || $first eq ''); $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq ''); $last = $tmp{'lastname'} if (!defined($last) || $last eq ''); $gene = $tmp{'generation'} if (!defined($gene) || $gene eq ''); $uid = $tmp{'id'} if (!defined($uid) || $uid eq ''); } my $fullname = &format_name($first,$middle,$last,$gene,'lastname'); my $reply=cput('classlist', {"$uname:$udom" => join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) }, $cdom,$cnum); unless (($reply eq 'ok') || ($reply eq 'delayed')) { return 'error: '.$reply; } # Add student role to user my $uurl='/'.$cid; $uurl=~s/\_/\//g; if ($usec) { $uurl.='/'.$usec; } return &assignrole($udom,$uname,$uurl,'st',$end,$start); } sub format_name { my ($firstname,$middlename,$lastname,$generation,$first)=@_; my $name; if ($first ne 'lastname') { $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation; } else { if ($lastname=~/\S/) { $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename; $name=~s/\s+,/,/; } else { $name.= $firstname.' '.$middlename.' '.$generation; } } $name=~s/^\s+//; $name=~s/\s+$//; $name=~s/\s+/ /g; return $name; } # ------------------------------------------------- Write to course preferences sub writecoursepref { my ($courseid,%prefs)=@_; $courseid=~s/^\///; $courseid=~s/\_/\//g; my ($cdomain,$cnum)=split(/\//,$courseid); my $chome=homeserver($cnum,$cdomain); if (($chome eq '') || ($chome eq 'no_host')) { return 'error: no such course'; } my $cstring=''; foreach (keys %prefs) { $cstring.=escape($_).'='.escape($prefs{$_}).'&'; } $cstring=~s/\&$//; return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome); } # ---------------------------------------------------------- Make/modify course sub createcourse { my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_; $url=&declutter($url); my $cid=''; unless (&allowed('ccc',$udom)) { return 'refused'; } # ------------------------------------------------------------------- Create ID my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)). unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'}; # ----------------------------------------------- Make sure that does not exist my $uhome=&homeserver($uname,$udom,'true'); unless (($uhome eq '') || ($uhome eq 'no_host')) { $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)). unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'}; $uhome=&homeserver($uname,$udom,'true'); unless (($uhome eq '') || ($uhome eq 'no_host')) { return 'error: unable to generate unique course-ID'; } } # ------------------------------------------------ Check supplied server name $course_server = $ENV{'user.homeserver'} if (! defined($course_server)); if (! exists($libserv{$course_server})) { return 'error:bad server name '.$course_server; } # ------------------------------------------------------------- Make the course my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::', $course_server); unless ($reply eq 'ok') { return 'error: '.$reply; } $uhome=&homeserver($uname,$udom,'true'); if (($uhome eq '') || ($uhome eq 'no_host')) { return 'error: no such course'; } # ----------------------------------------------------------------- Course made # log existence &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description). ':'.&escape($inst_code).':'.&escape($course_owner),$uhome); &flushcourselogs(); # set toplevel url my $topurl=$url; unless ($nonstandard) { # ------------------------------------------ For standard courses, make top url my $mapurl=&clutter($url); if ($mapurl eq '/res/') { $mapurl=''; } $ENV{'form.initmap'}=(<<ENDINITMAP); <map> <resource id="1" type="start"></resource> <resource id="2" src="$mapurl"></resource> <resource id="3" type="finish"></resource> <link index="1" from="1" to="2"></link> <link index="2" from="2" to="3"></link> </map> ENDINITMAP $topurl=&declutter( &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence') ); } # ----------------------------------------------------------- Write preferences &writecoursepref($udom.'_'.$uname, ('description' => $description, 'url' => $topurl)); return '/'.$udom.'/'.$uname; } # ---------------------------------------------------------- Assign Custom Role sub assigncustomrole { my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_; return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename, $end,$start,$deleteflag); } # ----------------------------------------------------------------- Revoke Role sub revokerole { my ($udom,$uname,$url,$role,$deleteflag)=@_; my $now=time; return &assignrole($udom,$uname,$url,$role,$now,$deleteflag); } # ---------------------------------------------------------- Revoke Custom Role sub revokecustomrole { my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_; my $now=time; return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now, $deleteflag); } # ------------------------------------------------------------ Disk usage sub diskusage { my ($udom,$uname,$directoryRoot)=@_; $directoryRoot =~ s/\/$//; my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom)); return $listing; } sub is_locked { my ($file_name, $domain, $user) = @_; my @check; my $is_locked; push @check, $file_name; my %locked = &get('file_permissions',\@check, $ENV{'user.domain'},$ENV{'user.name'}); my ($tmp)=keys(%locked); if ($tmp=~/^error:/) { undef(%locked); } if (ref($locked{$file_name}) eq 'ARRAY') { $is_locked = 'true'; } else { $is_locked = 'false'; } } # ------------------------------------------------------------- Mark as Read Only sub mark_as_readonly { my ($domain,$user,$files,$what) = @_; my %current_permissions = &dump('file_permissions',$domain,$user); my ($tmp)=keys(%current_permissions); if ($tmp=~/^error:/) { undef(%current_permissions); } foreach my $file (@{$files}) { push(@{$current_permissions{$file}},$what); } &put('file_permissions',\%current_permissions,$domain,$user); return; } # ------------------------------------------------------------Save Selected Files sub save_selected_files { my ($user, $path, @files) = @_; my $filename = $user."savedfiles"; my @other_files = &files_not_in_path($user, $path); open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename); foreach my $file (@files) { print (OUT $ENV{'form.currentpath'}.$file."\n"); } foreach my $file (@other_files) { print (OUT $file."\n"); } close (OUT); return 'ok'; } sub clear_selected_files { my ($user) = @_; my $filename = $user."savedfiles"; open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename); print (OUT undef); close (OUT); return ("ok"); } sub files_in_path { my ($user, $path) = @_; my $filename = $user."savedfiles"; my %return_files; open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename); while (my $line_in = <IN>) { chomp ($line_in); my @paths_and_file = split (m!/!, $line_in); my $file_part = pop (@paths_and_file); my $path_part = join ('/', @paths_and_file); $path_part.='/'; my $path_and_file = $path_part.$file_part; if ($path_part eq $path) { $return_files{$file_part}= 'selected'; } } close (IN); return (\%return_files); } # called in portfolio select mode, to show files selected NOT in current directory sub files_not_in_path { my ($user, $path) = @_; my $filename = $user."savedfiles"; my @return_files; my $path_part; open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename); while (<IN>) { #ok, I know it's clunky, but I want it to work my @paths_and_file = split m!/!, $_; my $file_part = pop (@paths_and_file); chomp ($file_part); my $path_part = join ('/', @paths_and_file); $path_part .= '/'; my $path_and_file = $path_part.$file_part; if ($path_part ne $path) { push (@return_files, ($path_and_file)); } } close (OUT); return (@return_files); } #--------------------------------------------------------------Get Marked as Read Only sub get_marked_as_readonly { my ($domain,$user,$what) = @_; my %current_permissions = &dump('file_permissions',$domain,$user); my ($tmp)=keys(%current_permissions); if ($tmp=~/^error:/) { undef(%current_permissions); } my @readonly_files; while (my ($file_name,$value) = each(%current_permissions)) { if (ref($value) eq "ARRAY"){ foreach my $stored_what (@{$value}) { if ($stored_what eq $what) { push(@readonly_files, $file_name); } elsif (!defined($what)) { push(@readonly_files, $file_name); } } } } return @readonly_files; } #-----------------------------------------------------------Get Marked as Read Only Hash sub get_marked_as_readonly_hash { my ($domain,$user,$what) = @_; my %current_permissions = &dump('file_permissions',$domain,$user); my ($tmp)=keys(%current_permissions); if ($tmp=~/^error:/) { undef(%current_permissions); } my %readonly_files; while (my ($file_name,$value) = each(%current_permissions)) { if (ref($value) eq "ARRAY"){ foreach my $stored_what (@{$value}) { if ($stored_what eq $what) { $readonly_files{$file_name} = 'locked'; } elsif (!defined($what)) { $readonly_files{$file_name} = 'locked'; } } } } return %readonly_files; } # ------------------------------------------------------------ Unmark as Read Only sub unmark_as_readonly { # unmarks all files locked by $what # for portfolio submissions, $what contains $crsid and $symb my ($domain,$user,$what) = @_; my %current_permissions = &dump('file_permissions',$domain,$user); my ($tmp)=keys(%current_permissions); if ($tmp=~/^error:/) { undef(%current_permissions); } my @readonly_files = &get_marked_as_readonly($domain,$user,$what); foreach my $file(@readonly_files){ my $current_locks = $current_permissions{$file}; my @new_locks; my @del_keys; if (ref($current_locks) eq "ARRAY"){ foreach my $locker (@{$current_locks}) { unless ($locker eq $what) { push(@new_locks, $what); } } if (@new_locks > 0) { $current_permissions{$file} = \@new_locks; } else { push(@del_keys, $file); &del('file_permissions',\@del_keys, $domain, $user); delete $current_permissions{$file}; } } } &put('file_permissions',\%current_permissions,$domain,$user); return; } # ------------------------------------------------------------ Directory lister sub dirlist { my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_; $uri=~s/^\///; $uri=~s/\/$//; my ($udom, $uname); (undef,$udom,$uname)=split(/\//,$uri); if(defined($userdomain)) { $udom = $userdomain; } if(defined($username)) { $uname = $username; } my $dirRoot = $perlvar{'lonDocRoot'}; if(defined($alternateDirectoryRoot)) { $dirRoot = $alternateDirectoryRoot; $dirRoot =~ s/\/$//; } if($udom) { if($uname) { my $listing=reply('ls2:'.$dirRoot.'/'.$uri, homeserver($uname,$udom)); my @listing_results; if ($listing eq 'unknown_cmd') { $listing=reply('ls:'.$dirRoot.'/'.$uri, homeserver($uname,$udom)); @listing_results = split(/:/,$listing); } else { @listing_results = map { &unescape($_); } split(/:/,$listing); } return @listing_results; } elsif(!defined($alternateDirectoryRoot)) { my $tryserver; my %allusers=(); foreach $tryserver (keys %libserv) { if($hostdom{$tryserver} eq $udom) { my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'. $udom, $tryserver); my @listing_results; if ($listing eq 'unknown_cmd') { $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'. $udom, $tryserver); @listing_results = split(/:/,$listing); } else { @listing_results = map { &unescape($_); } split(/:/,$listing); } if ($listing_results[0] ne 'no_such_dir' && $listing_results[0] ne 'empty' && $listing_results[0] ne 'con_lost') { foreach (@listing_results) { my ($entry,@stat)=split(/&/,$_); $allusers{$entry}=1; } } } } my $alluserstr=''; foreach (sort keys %allusers) { $alluserstr.=$_.'&user:'; } $alluserstr=~s/:$//; return split(/:/,$alluserstr); } else { my @emptyResults = (); push(@emptyResults, 'missing user name'); return split(':',@emptyResults); } } elsif(!defined($alternateDirectoryRoot)) { my $tryserver; my %alldom=(); foreach $tryserver (keys %libserv) { $alldom{$hostdom{$tryserver}}=1; } my $alldomstr=''; foreach (sort keys %alldom) { $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:'; } $alldomstr=~s/:$//; return split(/:/,$alldomstr); } else { my @emptyResults = (); push(@emptyResults, 'missing domain'); return split(':',@emptyResults); } } # --------------------------------------------- GetFileTimestamp # This function utilizes dirlist and returns the date stamp for # when it was last modified. It will also return an error of -1 # if an error occurs ## ## FIXME: This subroutine assumes its caller knows something about the ## directory structure of the home server for the student ($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 { my ($studentDomain,$studentName,$filename,$root)=@_; $studentDomain=~s/\W//g; $studentName=~s/\W//g; my $subdir=$studentName.'__'; $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/; my $proname="$studentDomain/$subdir/$studentName"; $proname .= '/'.$filename; my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName, $root); my @stats = split('&', $fileStat); if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') { # @stats contains first the filename, then the stat output return $stats[10]; # so this is 10 instead of 9. } else { return -1; } } # -------------------------------------------------------- Value of a Condition sub directcondval { my $number=shift; if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) { &Apache::lonuserstate::evalstate(); } if ($ENV{'user.state.'.$ENV{'request.course.id'}}) { return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1); } else { return 2; } } sub condval { my $condidx=shift; my $result=0; my $allpathcond=''; foreach (split(/\|/,$condidx)) { if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) { $allpathcond.= '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|'; } } $allpathcond=~s/\|$//; if ($ENV{'request.course.id'}) { if ($allpathcond) { my $operand='|'; my @stack; foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) { if ($_ eq '(') { push @stack,($operand,$result) } elsif ($_ eq ')') { my $before=pop @stack; if (pop @stack eq '&') { $result=$result>$before?$before:$result; } else { $result=$result>$before?$result:$before; } } elsif (($_ eq '&') || ($_ eq '|')) { $operand=$_; } else { my $new=directcondval($_); if ($operand eq '&') { $result=$result>$new?$new:$result; } else { $result=$result>$new?$result:$new; } } } } } return $result; } # ---------------------------------------------------- Devalidate courseresdata sub devalidatecourseresdata { my ($coursenum,$coursedomain)=@_; my $hashid=$coursenum.':'.$coursedomain; &devalidate_cache_new('courseres',$hashid); } # --------------------------------------------------- Course Resourcedata Query sub courseresdata { my ($coursenum,$coursedomain,@which)=@_; my $coursehom=&homeserver($coursenum,$coursedomain); my $hashid=$coursenum.':'.$coursedomain; my ($result,$cached)=&is_cached_new('courseres',$hashid); unless (defined($cached)) { my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum); $result=\%dumpreply; my ($tmp) = keys(%dumpreply); if ($tmp !~ /^(con_lost|error|no_such_host)/i) { &do_cache_new('courseres',$hashid,$result,600); } elsif ($tmp =~ /^(con_lost|no_such_host)/) { return $tmp; } elsif ($tmp =~ /^(error)/) { $result=undef; &do_cache_new('courseres',$hashid,$result,600); } } foreach my $item (@which) { if (defined($result->{$item})) { return $result->{$item}; } } return undef; } # # 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 { my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_; unless ($varname) { return ''; } #get real user name/domain, courseid and symb my $courseid; my $publicuser; if ($symbparm) { $symbparm=&get_symb_from_alias($symbparm); } if (!($uname && $udom)) { (my $cursymb,$courseid,$udom,$uname,$publicuser)= &Apache::lonxml::whichuser($symbparm); if (!$symbparm) { $symbparm=$cursymb; } } else { $courseid=$ENV{'request.course.id'}; } my ($realm,$space,$qualifier,@therest)=split(/\./,$varname); my $rest; if (defined($therest[0])) { $rest=join('.',@therest); } else { $rest=''; } my $qualifierrest=$qualifier; if ($rest) { $qualifierrest.='.'.$rest; } my $spacequalifierrest=$space; if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; } if ($realm eq 'user') { # --------------------------------------------------------------- user.resource if ($space eq 'resource') { if (defined($Apache::lonhomework::parsing_a_problem) || defined($Apache::lonhomework::parsing_a_task)) { return $Apache::lonhomework::history{$qualifierrest}; } else { my %restored; if ($publicuser || $ENV{'request.state'} eq 'construct') { %restored=&tmprestore($symbparm,$courseid,$udom,$uname); } else { %restored=&restore($symbparm,$courseid,$udom,$uname); } return $restored{$qualifierrest}; } # ----------------------------------------------------------------- user.access } elsif ($space eq 'access') { # FIXME - not supporting calls for a specific user return &allowed($qualifier,$rest); # ------------------------------------------ user.preferences, user.environment } elsif (($space eq 'preferences') || ($space eq 'environment')) { if (($uname eq $ENV{'user.name'}) && ($udom eq $ENV{'user.domain'})) { return $ENV{join('.',('environment',$qualifierrest))}; } else { my %returnhash; if (!$publicuser) { %returnhash=&userenvironment($udom,$uname, $qualifierrest); } return $returnhash{$qualifierrest}; } # ----------------------------------------------------------------- user.course } elsif ($space eq 'course') { # FIXME - not supporting calls for a specific user return $ENV{join('.',('request.course',$qualifier))}; # ------------------------------------------------------------------- user.role } elsif ($space eq 'role') { # FIXME - not supporting calls for a specific user my ($role,$where)=split(/\./,$ENV{'request.role'}); if ($qualifier eq 'value') { return $role; } elsif ($qualifier eq 'extent') { return $where; } # ----------------------------------------------------------------- user.domain } elsif ($space eq 'domain') { return $udom; # ------------------------------------------------------------------- user.name } elsif ($space eq 'name') { return $uname; # ---------------------------------------------------- Any other user namespace } else { my %reply; if (!$publicuser) { %reply=&get($space,[$qualifierrest],$udom,$uname); } return $reply{$qualifierrest}; } } elsif ($realm eq 'query') { # ---------------------------------------------- pull stuff out of query string &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, [$spacequalifierrest]); return $ENV{'form.'.$spacequalifierrest}; } elsif ($realm eq 'request') { # ------------------------------------------------------------- request.browser if ($space eq 'browser') { if ($qualifier eq 'textremote') { if (&mt('textual_remote_display') eq 'on') { return 1; } else { return 0; } } else { return $ENV{'browser.'.$qualifier}; } # ------------------------------------------------------------ request.filename } else { return $ENV{'request.'.$spacequalifierrest}; } } elsif ($realm eq 'course') { # ---------------------------------------------------------- course.description return $ENV{'course.'.$courseid.'.'.$spacequalifierrest}; } elsif ($realm eq 'resource') { my $section; if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) { if (!$symbparm) { $symbparm=&symbread(); } } my ($courselevelm,$courselevel); if ($symbparm && defined($courseid) && $courseid eq $ENV{'request.course.id'}) { #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest; # ----------------------------------------------------- Cascading lookup scheme my $symbp=$symbparm; my $mapp=(&decode_symb($symbp))[0]; my $symbparm=$symbp.'.'.$spacequalifierrest; my $mapparm=$mapp.'___(all).'.$spacequalifierrest; if (($ENV{'user.name'} eq $uname) && ($ENV{'user.domain'} eq $udom)) { $section=$ENV{'request.course.sec'}; } else { if (! defined($usection)) { $section=&getsection($udom,$uname,$courseid); } else { $section = $usection; } } my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest; my $seclevelr=$courseid.'.['.$section.'].'.$symbparm; my $seclevelm=$courseid.'.['.$section.'].'.$mapparm; $courselevel=$courseid.'.'.$spacequalifierrest; my $courselevelr=$courseid.'.'.$symbparm; $courselevelm=$courseid.'.'.$mapparm; # ----------------------------------------------------------- first, check user #most student don\'t have any data set, check if there is some data if (! &EXT_cache_status($udom,$uname)) { my $hashid="$udom:$uname"; my ($result,$cached)=&is_cached_new('userres',$hashid); if (!defined($cached)) { my %resourcedata=&dump('resourcedata',$udom,$uname); $result=\%resourcedata; &do_cache_new('userres',$hashid,$result); } my ($tmp)=keys(%$result); if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) { if ($$result{$courselevelr}) { return $$result{$courselevelr}; } if ($$result{$courselevelm}) { return $$result{$courselevelm}; } if ($$result{$courselevel}) { return $$result{$courselevel}; } } else { #error 2 occurs when the .db doesn't exist if ($tmp!~/error: 2 /) { &logthis("<font color=blue>WARNING:". " Trying to get resource data for ". $uname." at ".$udom.": ". $tmp."</font>"); } elsif ($tmp=~/error: 2 /) { &EXT_cache_set($udom,$uname); } elsif ($tmp =~ /^(con_lost|no_such_host)/) { return $tmp; } } } # ------------------------------------------------ second, check some of course my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'}, $ENV{'course.'.$courseid.'.domain'}, ($seclevelr,$seclevelm,$seclevel, $courselevelr)); if (defined($coursereply)) { return $coursereply; } # ------------------------------------------------------ third, check map parms my %parmhash=(); my $thisparm=''; if (tie(%parmhash,'GDBM_File', $ENV{'request.course.fn'}.'_parms.db', &GDBM_READER(),0640)) { $thisparm=$parmhash{$symbparm}; untie(%parmhash); } if ($thisparm) { return $thisparm; } } # ------------------------------------------ fourth, look in resource metadata $spacequalifierrest=~s/\./\_/; my $filename; if (!$symbparm) { $symbparm=&symbread(); } if ($symbparm) { $filename=(&decode_symb($symbparm))[2]; } else { $filename=$ENV{'request.filename'}; } my $metadata=&metadata($filename,$spacequalifierrest); if (defined($metadata)) { return $metadata; } $metadata=&metadata($filename,'parameter_'.$spacequalifierrest); if (defined($metadata)) { return $metadata; } # ---------------------------------------------- fourth, look in rest pf course if ($symbparm && defined($courseid) && $courseid eq $ENV{'request.course.id'}) { my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'}, $ENV{'course.'.$courseid.'.domain'}, ($courselevelm,$courselevel)); if (defined($coursereply)) { return $coursereply; } } # ------------------------------------------------------------------ Cascade up unless ($space eq '0') { my @parts=split(/_/,$space); my $id=pop(@parts); my $part=join('_',@parts); if ($part eq '') { $part='0'; } my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest, $symbparm,$udom,$uname,$section,1); if (defined($partgeneral)) { return $partgeneral; } } if ($recurse) { return undef; } my $pack_def=&packages_tab_default($filename,$varname); if (defined($pack_def)) { return $pack_def; } # ---------------------------------------------------- Any other user namespace } elsif ($realm eq 'environment') { # ----------------------------------------------------------------- environment if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) { return $ENV{'environment.'.$spacequalifierrest}; } else { my %returnhash=&userenvironment($udom,$uname, $spacequalifierrest); return $returnhash{$spacequalifierrest}; } } elsif ($realm eq 'system') { # ----------------------------------------------------------------- system.time if ($space eq 'time') { return time; } } return ''; } sub packages_tab_default { my ($uri,$varname)=@_; my (undef,$part,$name)=split(/\./,$varname); my $packages=&metadata($uri,'packages'); foreach my $package (split(/,/,$packages)) { my ($pack_type,$pack_part)=split(/_/,$package,2); if (defined($packagetab{"$pack_type&$name&default"})) { return $packagetab{"$pack_type&$name&default"}; } if ($pack_type eq 'part') { $pack_part='0'; } if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) { return $packagetab{$pack_type."_".$pack_part."&$name&default"}; } } return undef; } sub add_prefix_and_part { my ($prefix,$part)=@_; my $keyroot; if (defined($prefix) && $prefix !~ /^__/) { # prefix that has a part already $keyroot=$prefix; } elsif (defined($prefix)) { # prefix that is missing a part if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); } } else { # no prefix at all if (defined($part)) { $keyroot='_'.$part; } } return $keyroot; } # ---------------------------------------------------------------- Get metadata my %metaentry; sub metadata { my ($uri,$what,$liburi,$prefix,$depthcount)=@_; $uri=&declutter($uri); # if it is a non metadata possible uri return quickly if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) || ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) || ($uri =~ m|home/[^/]+/public_html/|)) { return undef; } my $filename=$uri; $uri=~s/\.meta$//; # # Is the metadata already cached? # Look at timestamp of caching # Everything is cached by the main uri, libraries are never directly cached # if (!defined($liburi)) { my ($result,$cached)=&is_cached_new('meta',$uri); if (defined($cached)) { return $result->{':'.$what}; } } { # # Is this a recursive call for a library? # # if (! exists($metacache{$uri})) { # $metacache{$uri}={}; # } if ($liburi) { $liburi=&declutter($liburi); $filename=$liburi; } else { &devalidate_cache_new('meta',$uri); undef(%metaentry); } my %metathesekeys=(); unless ($filename=~/\.meta$/) { $filename.='.meta'; } my $metastring; if ($uri !~ m -^(uploaded|editupload)/-) { my $file=&filelocation('',&clutter($filename)); #push(@{$metaentry{$uri.'.file'}},$file); $metastring=&getfile($file); } my $parser=HTML::LCParser->new(\$metastring); my $token; undef %metathesekeys; while ($token=$parser->get_token) { if ($token->[0] eq 'S') { if (defined($token->[2]->{'package'})) { # # This is a package - get package info # my $package=$token->[2]->{'package'}; my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'}); if (defined($token->[2]->{'id'})) { $keyroot.='_'.$token->[2]->{'id'}; } if ($metaentry{':packages'}) { $metaentry{':packages'}.=','.$package.$keyroot; } else { $metaentry{':packages'}=$package.$keyroot; } foreach (sort keys %packagetab) { my $part=$keyroot; $part=~s/^\_//; if ($_=~/^\Q$package\E\&/ || $_=~/^\Q$package\E_0\&/) { 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 $unikey; if ($pack =~ /_0$/) { $unikey='parameter_0_'.$name; $part=0; } else { $unikey='parameter'.$keyroot.'_'.$name; } if ($subp eq 'display') { $value.=' [Part: '.$part.']'; } $metaentry{':'.$unikey.'.part'}=$part; $metathesekeys{$unikey}=1; unless (defined($metaentry{':'.$unikey.'.'.$subp})) { $metaentry{':'.$unikey.'.'.$subp}=$value; } if (defined($metaentry{':'.$unikey.'.default'})) { $metaentry{':'.$unikey}= $metaentry{':'.$unikey.'.default'}; } } } } else { # # This is not a package - some other kind of start tag # my $entry=$token->[1]; my $unikey; if ($entry eq 'import') { $unikey=''; } else { $unikey=$entry; } $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'}); if (defined($token->[2]->{'id'})) { $unikey.='_'.$token->[2]->{'id'}; } if ($entry eq 'import') { # # Importing a library here # if ($depthcount<20) { my $location=$parser->get_text('/import'); my $dir=$filename; $dir=~s|[^/]*$||; $location=&filelocation($dir,$location); foreach (sort(split(/\,/,&metadata($uri,'keys', $location,$unikey, $depthcount+1)))) { $metaentry{':'.$_}=$metaentry{':'.$_}; $metathesekeys{$_}=1; } } } else { if (defined($token->[2]->{'name'})) { $unikey.='_'.$token->[2]->{'name'}; } $metathesekeys{$unikey}=1; foreach (@{$token->[3]}) { $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_}; } my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry)); my $default=$metaentry{':'.$unikey.'.default'}; if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) { # only ws inside the tag, and not in default, so use default # as value $metaentry{':'.$unikey}=$default; } else { # either something interesting inside the tag or default # uninteresting $metaentry{':'.$unikey}=$internaltext; } # end of not-a-package not-a-library import } # end of not-a-package start tag } # the next is the end of "start tag" } } my ($extension) = ($uri =~ /\.(\w+)$/); foreach my $key (sort(keys(%packagetab))) { #&logthis("extsion1 $extension $key !!"); #no specific packages #how's our extension if ($key!~/^extension_\Q$extension\E&/) { next; } &metadata_create_package_def($uri,$key,'extension_'.$extension, \%metathesekeys); } if (!exists($metaentry{':packages'})) { foreach my $key (sort(keys(%packagetab))) { #no specific packages well let's get default then if ($key!~/^default&/) { next; } &metadata_create_package_def($uri,$key,'default', \%metathesekeys); } } # are there custom rights to evaluate if ($metaentry{':copyright'} eq 'custom') { # # Importing a rights file here # unless ($depthcount) { my $location=$metaentry{':customdistributionfile'}; my $dir=$filename; $dir=~s|[^/]*$||; $location=&filelocation($dir,$location); foreach (sort(split(/\,/,&metadata($uri,'keys', $location,'_rights', $depthcount+1)))) { #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_}; $metathesekeys{$_}=1; } } } $metaentry{':keys'}=join(',',keys %metathesekeys); &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri); $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys); &do_cache_new('meta',$uri,\%metaentry); # this is the end of "was not already recently cached } return $metaentry{':'.$what}; } sub metadata_create_package_def { my ($uri,$key,$package,$metathesekeys)=@_; my ($pack,$name,$subp)=split(/\&/,$key); if ($subp eq 'default') { next; } if (defined($metaentry{':packages'})) { $metaentry{':packages'}.=','.$package; } else { $metaentry{':packages'}=$package; } my $value=$packagetab{$key}; my $unikey; $unikey='parameter_0_'.$name; $metaentry{':'.$unikey.'.part'}=0; $$metathesekeys{$unikey}=1; unless (defined($metaentry{':'.$unikey.'.'.$subp})) { $metaentry{':'.$unikey.'.'.$subp}=$value; } if (defined($metaentry{':'.$unikey.'.default'})) { $metaentry{':'.$unikey}= $metaentry{':'.$unikey.'.default'}; } } sub metadata_generate_part0 { my ($metadata,$metacache,$uri) = @_; my %allnames; foreach my $metakey (sort keys %$metadata) { if ($metakey=~/^parameter\_(.*)/) { my $part=$$metacache{':'.$metakey.'.part'}; my $name=$$metacache{':'.$metakey.'.name'}; if (! exists($$metadata{'parameter_0_'.$name.'.name'})) { $allnames{$name}=$part; } } } foreach my $name (keys(%allnames)) { $$metadata{"parameter_0_$name"}=1; my $key=":parameter_0_$name"; $$metacache{"$key.part"}='0'; $$metacache{"$key.name"}=$name; $$metacache{"$key.type"}=$$metacache{':parameter_'. $allnames{$name}.'_'.$name. '.type'}; my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name. '.display'}; my $expr='\\[Part: '.$allnames{$name}.'\\]'; $olddis=~s/\Q$expr\E/\[Part: 0\]/; $$metacache{"$key.display"}=$olddis; } } # ------------------------------------------------- Get the title of a resource sub gettitle { my $urlsymb=shift; my $symb=&symbread($urlsymb); if ($symb) { my $key=$ENV{'request.course.id'}."\0".$symb; my ($result,$cached)=&is_cached_new('title',$key); if (defined($cached)) { return $result; } my ($map,$resid,$url)=&decode_symb($symb); my $title=''; my %bighash; if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', &GDBM_READER(),0640)) { my $mapid=$bighash{'map_pc_'.&clutter($map)}; $title=$bighash{'title_'.$mapid.'.'.$resid}; untie %bighash; } $title=~s/\&colon\;/\:/gs; if ($title) { return &do_cache_new('title',$key,$title,600); } $urlsymb=$url; } my $title=&metadata($urlsymb,'title'); if (!$title) { $title=(split('/',$urlsymb))[-1]; } return $title; } sub get_slot { my ($which,$cnum,$cdom)=@_; if (!$cnum || !$cdom) { (undef,my $courseid)=&Apache::lonxml::whichuser(); $cdom=$ENV{'course.'.$courseid.'.domain'}; $cnum=$ENV{'course.'.$courseid.'.num'}; } my %slotinfo=&get('slots',[$which],$cdom,$cnum); &Apache::lonhomework::showhash(%slotinfo); my ($tmp)=keys(%slotinfo); if ($tmp=~/^error:/) { return (); } if (ref($slotinfo{$which}) eq 'HASH') { return %{$slotinfo{$which}}; } return $slotinfo{$which}; } # ------------------------------------------------- Update symbolic store links sub symblist { my ($mapname,%newhash)=@_; $mapname=&deversion(&declutter($mapname)); my %hash; if (($ENV{'request.course.fn'}) && (%newhash)) { if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', &GDBM_WRCREAT(),0640)) { foreach (keys %newhash) { $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1], $newhash{$_}->[0]); } if (untie(%hash)) { return 'ok'; } } } return 'error'; } # --------------------------------------------------------------- Verify a symb sub symbverify { my ($symb,$thisurl)=@_; my $thisfn=$thisurl; # wrapper not part of symbs $thisfn=~s/^\/adm\/wrapper//; $thisfn=&declutter($thisfn); # direct jump to resource in page or to a sequence - will construct own symbs if ($thisfn=~/\.(page|sequence)$/) { return 1; } # check URL part my ($map,$resid,$url)=&decode_symb($symb); unless ($url eq $thisfn) { return 0; } $symb=&symbclean($symb); $thisurl=&deversion($thisurl); $thisfn=&deversion($thisfn); my %bighash; my $okay=0; if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', &GDBM_READER(),0640)) { my $ids=$bighash{'ids_'.&clutter($thisurl)}; unless ($ids) { $ids=$bighash{'ids_/'.$thisurl}; } if ($ids) { # ------------------------------------------------------------------- Has ID(s) foreach (split(/\,/,$ids)) { my ($mapid,$resid)=split(/\./,$_); if ( &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn) eq $symb) { if (($ENV{'request.role.adv'}) || $bighash{'encrypted_'.$_} eq $ENV{'request.enc'}) { $okay=1; } } } } untie(%bighash); } return $okay; } # --------------------------------------------------------------- Clean-up symb sub symbclean { my $symb=shift; if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); } # remove version from map $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/; # remove version from URL $symb=~s/\.(\d+)\.(\w+)$/\.$2/; # remove wrapper $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/; return $symb; } # ---------------------------------------------- Split symb to find map and url sub encode_symb { my ($map,$resid,$url)=@_; return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url)); } sub decode_symb { my $symb=shift; if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); } my ($map,$resid,$url)=split(/___/,$symb); return (&fixversion($map),$resid,&fixversion($url)); } sub fixversion { my $fn=shift; if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; } my %bighash; my $uri=&clutter($fn); my $key=$ENV{'request.course.id'}.'_'.$uri; # is this cached? my ($result,$cached)=&is_cached_new('courseresversion',$key); if (defined($cached)) { return $result; } # unfortunately not cached, or expired if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', &GDBM_READER(),0640)) { if ($bighash{'version_'.$uri}) { my $version=$bighash{'version_'.$uri}; unless (($version eq 'mostrecent') || ($version==&getversion($uri))) { $uri=~s/\.(\w+)$/\.$version\.$1/; } } untie %bighash; } return &do_cache_new('courseresversion',$key,&declutter($uri),600); } sub deversion { my $url=shift; $url=~s/\.\d+\.(\w+)$/\.$1/; return $url; } # ------------------------------------------------------ Return symb list entry sub symbread { my ($thisfn,$donotrecurse)=@_; my $cache_str='request.symbread.cached.'.$thisfn; if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; } # no filename provided? try from environment unless ($thisfn) { if ($ENV{'request.symb'}) { return $ENV{$cache_str}=&symbclean($ENV{'request.symb'}); } $thisfn=$ENV{'request.filename'}; } if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); } # is that filename actually a symb? Verify, clean, and return if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) { if (&symbverify($thisfn,$1)) { return $ENV{$cache_str}=&symbclean($thisfn); } } $thisfn=declutter($thisfn); my %hash; my %bighash; my $syval=''; if (($ENV{'request.course.fn'}) && ($thisfn)) { my $targetfn = $thisfn; if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) { $targetfn = 'adm/wrapper/'.$thisfn; } if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', &GDBM_READER(),0640)) { $syval=$hash{$targetfn}; untie(%hash); } # ---------------------------------------------------------- There was an entry if ($syval) { #unless ($syval=~/\_\d+$/) { #unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) { #&appenv('request.ambiguous' => $thisfn); #return $ENV{$cache_str}=''; #} #$syval.=$1; #} } else { # ------------------------------------------------------- Was not in symb table if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', &GDBM_READER(),0640)) { # ---------------------------------------------- Get ID(s) for current resource my $ids=$bighash{'ids_'.&clutter($thisfn)}; unless ($ids) { $ids=$bighash{'ids_/'.$thisfn}; } unless ($ids) { # alias? $ids=$bighash{'mapalias_'.$thisfn}; } if ($ids) { # ------------------------------------------------------------------- Has ID(s) my @possibilities=split(/\,/,$ids); if ($#possibilities==0) { # ----------------------------------------------- There is only one possibility my ($mapid,$resid)=split(/\./,$ids); $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid; } elsif (!$donotrecurse) { # ------------------------------------------ There is more than one possibility my $realpossible=0; foreach (@possibilities) { my $file=$bighash{'src_'.$_}; if (&allowed('bre',$file)) { my ($mapid,$resid)=split(/\./,$_); if ($bighash{'map_type_'.$mapid} ne 'page') { $realpossible++; $syval=declutter($bighash{'map_id_'.$mapid}). '___'.$resid; } } } if ($realpossible!=1) { $syval=''; } } else { $syval=''; } } untie(%bighash) } } if ($syval) { return $ENV{$cache_str}=$syval; #return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn); } } &appenv('request.ambiguous' => $thisfn); return $ENV{$cache_str}=''; } # ---------------------------------------------------------- Return random seed sub numval { 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; if ($_64bit) { if ($txt > 2**32) { return -1; } } return int($txt); } sub numval2 { my $txt=shift; $txt=~tr/A-J/0-9/; $txt=~tr/a-j/0-9/; $txt=~tr/K-T/0-9/; $txt=~tr/k-t/0-9/; $txt=~tr/U-Z/0-5/; $txt=~tr/u-z/0-5/; $txt=~s/\D//g; my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt); my $total; foreach my $val (@txts) { $total+=$val; } if ($_64bit) { if ($total > 2**32) { return -1; } } return int($total); } sub numval3 { use integer; my $txt=shift; $txt=~tr/A-J/0-9/; $txt=~tr/a-j/0-9/; $txt=~tr/K-T/0-9/; $txt=~tr/k-t/0-9/; $txt=~tr/U-Z/0-5/; $txt=~tr/u-z/0-5/; $txt=~s/\D//g; my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt); my $total; foreach my $val (@txts) { $total+=$val; } if ($_64bit) { $total=(($total<<32)>>32); } return $total; } sub latest_rnd_algorithm_id { return '64bit4'; } sub get_rand_alg { my ($courseid)=@_; if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; } if ($courseid) { return $ENV{"course.$courseid.rndseed"}; } return &latest_rnd_algorithm_id(); } sub validCODE { my ($CODE)=@_; if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; } return 0; } sub getCODE { if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; } if ( (defined($Apache::lonhomework::parsing_a_problem) || defined($Apache::lonhomework::parsing_a_task) ) && &validCODE($Apache::lonhomework::history{'resource.CODE'})) { return $Apache::lonhomework::history{'resource.CODE'}; } return undef; } sub rndseed { my ($symb,$courseid,$domain,$username)=@_; my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser(); if (!$symb) { 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())) { if ($which eq '64bit4') { return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username); } else { return &rndseed_CODE_64bit($symb,$courseid,$domain,$username); } } elsif ($which eq '64bit4') { return &rndseed_64bit4($symb,$courseid,$domain,$username); } elsif ($which eq '64bit3') { return &rndseed_64bit3($symb,$courseid,$domain,$username); } elsif ($which eq '64bit2') { return &rndseed_64bit2($symb,$courseid,$domain,$username); } elsif ($which eq '64bit') { 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"); if ($_64bit) { $num=(($num<<32)>>32); } 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"); if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); } if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); } return "$num1,$num2"; } } sub rndseed_64bit2 { my ($symb,$courseid,$domain,$username)=@_; { use integer; # strings need to be an even # of cahracters long, it it is odd the # last characters gets thrown away my $symbchck=unpack("%32S*",$symb.' ') << 21; my $symbseed=numval($symb) << 10; my $namechck=unpack("%32S*",$username.' '); my $nameseed=numval($username) << 21; my $domainseed=unpack("%32S*",$domain.' ') << 10; my $courseseed=unpack("%32S*",$courseid.' '); my $num1=$symbchck+$symbseed+$namechck; my $num2=$nameseed+$domainseed+$courseseed; #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck"); #&Apache::lonxml::debug("rndseed :$num:$symb"); return "$num1,$num2"; } } sub rndseed_64bit3 { my ($symb,$courseid,$domain,$username)=@_; { use integer; # strings need to be an even # of cahracters long, it it is odd the # last characters gets thrown away my $symbchck=unpack("%32S*",$symb.' ') << 21; my $symbseed=numval2($symb) << 10; my $namechck=unpack("%32S*",$username.' '); my $nameseed=numval2($username) << 21; my $domainseed=unpack("%32S*",$domain.' ') << 10; my $courseseed=unpack("%32S*",$courseid.' '); my $num1=$symbchck+$symbseed+$namechck; my $num2=$nameseed+$domainseed+$courseseed; #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck"); #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit"); if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); } return "$num1:$num2"; } } sub rndseed_64bit4 { my ($symb,$courseid,$domain,$username)=@_; { use integer; # strings need to be an even # of cahracters long, it it is odd the # last characters gets thrown away my $symbchck=unpack("%32S*",$symb.' ') << 21; my $symbseed=numval3($symb) << 10; my $namechck=unpack("%32S*",$username.' '); my $nameseed=numval3($username) << 21; my $domainseed=unpack("%32S*",$domain.' ') << 10; my $courseseed=unpack("%32S*",$courseid.' '); my $num1=$symbchck+$symbseed+$namechck; my $num2=$nameseed+$domainseed+$courseseed; #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck"); #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit"); if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); } return "$num1:$num2"; } } sub rndseed_CODE_64bit { 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"); if ($_64bit) { $num1=(($num1<<32)>>32); } if ($_64bit) { $num2=(($num2<<32)>>32); } return "$num1:$num2"; } } sub rndseed_CODE_64bit4 { my ($symb,$courseid,$domain,$username)=@_; { use integer; my $symbchck=unpack("%32S*",$symb.' ') << 16; my $symbseed=numval3($symb); my $CODEchck=unpack("%32S*",&getCODE().' ') << 16; my $CODEseed=numval3(&getCODE()); my $courseseed=unpack("%32S*",$courseid.' '); my $num1=$symbseed+$CODEchck; my $num2=$CODEseed+$courseseed+$symbchck; #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck"); #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb"); if ($_64bit) { $num1=(($num1<<32)>>32); } if ($_64bit) { $num2=(($num2<<32)>>32); } return "$num1:$num2"; } } sub setup_random_from_rndseed { 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 { my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_; my $cuname=unpack("%32C*",$funame); my $cudom=unpack("%32C*",$fudom); my $cucourseid=unpack("%32C*",$fucourseid); my $cusymb=unpack("%32C*",$fusymb); my $cunique=&recunique($fucourseid); my $cpart=unpack("%32S*",$part); my $return =&recprefix($fucourseid).'-'; if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' || $ENV{'request.state'} eq 'construct') { &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname). " and ".($cpart%$cudom)); $return.= ($cunique%$cuname+ $cunique%$cudom+ $cusymb%$cuname+ $cusymb%$cudom+ $cucourseid%$cuname+ $cucourseid%$cudom+ $cpart%$cuname+ $cpart%$cudom); } else { $return.= ($cunique%$cuname+ $cunique%$cudom+ $cusymb%$cuname+ $cusymb%$cudom+ $cucourseid%$cuname+ $cucourseid%$cudom); } return $return; } sub receipt { my ($part)=@_; my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); return &ireceipt($name,$domain,$courseid,$symb,$part); } # ------------------------------------------------------------ Serves up a file # returns either the contents of the file or # -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 { my ($file) = @_; if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); } &repcopy($file); return &readfile($file); } sub repcopy_userfile { my ($file)=@_; if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); } if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; } my ($cdom,$cnum,$filename) = ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|); my ($info,$rtncode); my $uri="/uploaded/$cdom/$cnum/$filename"; if (-e "$file") { my @fileinfo = stat($file); my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode); if ($lwpresp ne 'ok') { if ($rtncode eq '404') { unlink($file); } #my $ua=new LWP::UserAgent; #my $request=new HTTP::Request('GET',&tokenwrapper($uri)); #my $response=$ua->request($request); #if ($response->is_success()) { # return $response->content; # } else { # return -1; # } return -1; } if ($info < $fileinfo[9]) { return 'ok'; } $info = ''; $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode); if ($lwpresp ne 'ok') { return -1; } } else { my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode); if ($lwpresp ne 'ok') { my $ua=new LWP::UserAgent; my $request=new HTTP::Request('GET',&tokenwrapper($uri)); my $response=$ua->request($request); if ($response->is_success()) { $info=$response->content; } else { return -1; } } my @parts = ($cdom,$cnum); if ($filename =~ m|^(.+)/[^/]+$|) { push @parts, split(/\//,$1); } my $path = $perlvar{'lonDocRoot'}.'/userfiles'; foreach my $part (@parts) { $path .= '/'.$part; if (!-e $path) { mkdir($path,0770); } } } open(FILE,">$file"); print FILE $info; close(FILE); return 'ok'; } sub tokenwrapper { my $uri=shift; $uri=~s|^http\://([^/]+)||; $uri=~s|^/||; $ENV{'user.environment'}=~/\/([^\/]+)\.id/; my $token=$1; my (undef,$udom,$uname,$file)=split('/',$uri,4); if ($udom && $uname && $file) { $file=~s|(\?\.*)*$||; &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'}); return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri. (($uri=~/\?/)?'&':'?').'token='.$token. '&tokenissued='.$perlvar{'lonHostID'}; } else { return '/adm/notfound.html'; } } sub getuploaded { my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_; $uri=~s/^\///; $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri; my $ua=new LWP::UserAgent; my $request=new HTTP::Request($reqtype,$uri); my $response=$ua->request($request); $$rtncode = $response->code; if (! $response->is_success()) { return 'failed'; } if ($reqtype eq 'HEAD') { $$info = &HTTP::Date::str2time( $response->header('Last-modified') ); } elsif ($reqtype eq 'GET') { $$info = $response->content; } return 'ok'; } sub readfile { my $file = shift; if ( (! -e $file ) || ($file eq '') ) { return -1; }; my $fh; open($fh,"<$file"); my $a=''; while (<$fh>) { $a .=$_; } return $a; } sub filelocation { my ($dir,$file) = @_; my $location; $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces if ($file=~m:^/~:) { # is a contruction space reference $location = $file; $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:; } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file my ($udom,$uname,$filename)= ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-); my $home=&homeserver($uname,$udom); my $is_me=0; my @ids=¤t_machine_ids(); foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } } if ($is_me) { $location=&Apache::loncommon::propath($udom,$uname). '/userfiles/'.$filename; } else { $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'. $udom.'/'.$uname.'/'.$filename; } } else { $file=~s/^\Q$perlvar{'lonDocRoot'}\E//; $file=~s:^/res/:/:; if ( !( $file =~ m:^/:) ) { $location = $dir. '/'.$file; } else { $location = '/home/httpd/html/res'.$file; } } $location=~s://+:/:g; # remove duplicate / while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/.. while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./ return $location; } sub hreflocation { my ($dir,$file)=@_; unless (($file=~m-^http://-i) || ($file=~m-^/-)) { my $finalpath=filelocation($dir,$file); $finalpath=~s-^/home/httpd/html--; $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-; return $finalpath; } elsif ($file=~m-^/home-) { $file=~s-^/home/httpd/html--; $file=~s-^/home/(\w+)/public_html/-/~$1/-; return $file; } return $file; } sub current_machine_domains { my $hostname=$hostname{$perlvar{'lonHostID'}}; my @domains; while( my($id, $name) = each(%hostname)) { # &logthis("-$id-$name-$hostname-"); if ($hostname eq $name) { push(@domains,$hostdom{$id}); } } return @domains; } sub current_machine_ids { my $hostname=$hostname{$perlvar{'lonHostID'}}; my @ids; while( my($id, $name) = each(%hostname)) { # &logthis("-$id-$name-$hostname-"); if ($hostname eq $name) { push(@ids,$id); } } return @ids; } # ------------------------------------------------------------- Declutters URLs sub declutter { my $thisfn=shift; if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); } $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//; $thisfn=~s/^\///; $thisfn=~s/^res\///; $thisfn=~s/\?.+$//; return $thisfn; } # ------------------------------------------------------------- Clutter up URLs sub clutter { my $thisfn='/'.&declutter(shift); unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) { $thisfn='/res'.$thisfn; } return $thisfn; } sub freeze_escape { my ($value)=@_; if (ref($value)) { $value=&nfreeze($value); return '__FROZEN__'.&escape($value); } return &escape($value); } # -------------------------------------------------------- Escape Special Chars sub escape { my $str=shift; $str =~ s/(\W)/"%".unpack('H2',$1)/eg; return $str; } # ----------------------------------------------------- Un-Escape Special Chars sub unescape { my $str=shift; $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; return $str; } sub thaw_unescape { my ($value)=@_; if ($value =~ /^__FROZEN__/) { substr($value,0,10,undef); $value=&unescape($value); return &thaw($value); } return &unescape($value); } sub mod_perl_version { return 1; if (defined($perlvar{'MODPERL2'})) { return 2; } } sub correct_line_ends { my ($result)=@_; $$result =~s/\r\n/\n/mg; $$result =~s/\r/\n/mg; } # ================================================================ Main Program sub goodbye { &logthis("Starting Shut down"); #not converted to using infrastruture and probably shouldn't be &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache)))); #converted # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache))); &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache)))); # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache)))); # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache)))); #1.1 only # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache)))); # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache)))); # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache)))); # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache)))); &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered)))); &logthis(sprintf("%-20s is %s",'kicks',$kicks)); &logthis(sprintf("%-20s is %s",'hits',$hits)); &flushcourselogs(); &logthis("Shutting down"); return DONE; } BEGIN { # ----------------------------------- Read loncapa.conf and loncapa_apache.conf unless ($readit) { { # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block open(my $config,"</etc/httpd/conf/loncapa.conf"); while (my $configline=<$config>) { if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) { my ($dummy,$varname,$varvalue)=split(/\s+/,$configline); chomp($varvalue); $perlvar{$varname}=$varvalue; } } close($config); } { open(my $config,"</etc/httpd/conf/loncapa_apache.conf"); while (my $configline=<$config>) { if ($configline =~ /^[^\#]*PerlSetVar/) { my ($dummy,$varname,$varvalue)=split(/\s+/,$configline); chomp($varvalue); $perlvar{$varname}=$varvalue; } } close($config); } # ------------------------------------------------------------ Read domain file { %domaindescription = (); %domain_auth_def = (); %domain_auth_arg_def = (); my $fh; if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) { while (<$fh>) { next if (/^(\#|\s*$)/); # next if /^\#/; chomp; my ($domain, $domain_description, $def_auth, $def_auth_arg, $def_lang, $city, $longi, $lati) = split(/:/,$_); $domain_auth_def{$domain}=$def_auth; $domain_auth_arg_def{$domain}=$def_auth_arg; $domaindescription{$domain}=$domain_description; $domain_lang_def{$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{$domain} ); } } close ($fh); } # ------------------------------------------------------------- Read hosts file { open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab"); while (my $configline=<$config>) { next if ($configline =~ /^(\#|\s*$)/); chomp($configline); my ($id,$domain,$role,$name)=split(/:/,$configline); $name=~s/\s//g; if ($id && $domain && $role && $name) { $hostname{$id}=$name; $hostdom{$id}=$domain; if ($role eq 'library') { $libserv{$id}=$name; } } } close($config); # FIXME: dev server don't want this, production servers _do_ want this #&get_iphost(); } sub get_iphost { if (%iphost) { return %iphost; } foreach my $id (keys(%hostname)) { my $name=$hostname{$id}; my $ip = gethostbyname($name); if (!$ip || length($ip) ne 4) { &logthis("Skipping host $id name $name no IP found\n"); next; } $ip=inet_ntoa($ip); push(@{$iphost{$ip}},$id); } return %iphost; } # ------------------------------------------------------ Read spare server file { open(my $config,"<$perlvar{'lonTabDir'}/spare.tab"); while (my $configline=<$config>) { chomp($configline); if ($configline) { $spareid{$configline}=1; } } close($config); } # ------------------------------------------------------------ Read permissions { open(my $config,"<$perlvar{'lonTabDir'}/roles.tab"); while (my $configline=<$config>) { chomp($configline); if ($configline) { my ($role,$perm)=split(/ /,$configline); if ($perm ne '') { $pr{$role}=$perm; } } } close($config); } # -------------------------------------------- Read plain texts for permissions { open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab"); while (my $configline=<$config>) { chomp($configline); if ($configline) { my ($short,$plain)=split(/:/,$configline); if ($plain ne '') { $prp{$short}=$plain; } } } close($config); } # ---------------------------------------------------------- Read package table { open(my $config,"<$perlvar{'lonTabDir'}/packages.tab"); while (my $configline=<$config>) { if ($configline !~ /\S/ || $configline=~/^#/) { next; } chomp($configline); my ($short,$plain)=split(/:/,$configline); my ($pack,$name)=split(/\&/,$short); if ($plain ne '') { $packagetab{$pack.'&'.$name.'&name'}=$name; $packagetab{$short}=$plain; } } close($config); } # ------------- set up temporary directory { $tmpdir = $perlvar{'lonDaemons'}.'/tmp/'; } $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']}); $processmarker='_'.time.'_'.$perlvar{'lonHostID'}; $dumpcount=0; &logtouch(); &logthis('<font color=yellow>INFO: Read configuration</font>'); $readit=1; { use integer; my $test=(2**32)+1; if ($test != 0) { $_64bit=1; } else { $_64bit=0; } &logthis(" Detected 64bit platform ($_64bit)"); } } } 1; __END__ =pod =head1 NAME Apache::lonnet - Subroutines to ask questions about things in the network. =head1 SYNOPSIS Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network. &Apache::lonnet::SUBROUTINENAME(ARGUMENTS); Common parameters: =over 4 =item * $uname : an internal username (if $cname expecting a course Id specifically) =item * $udom : a domain (if $cdom expecting a course's domain specifically) =item * $symb : a resource instance identifier =item * $namespace : the name of a .db file that contains the data needed or being set. =back =head1 OVERVIEW lonnet provides subroutines which interact with the lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask about classes, users, and resources. For many of these objects you can also use this to store data about them or modify them in various ways. =head2 Symbs 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. An example is msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem The respective map entry is <resource id="19" src="/res/msu/korte/tests/part12.problem" title="Problem 2"> </resource> Symbs are used by the random number generator, as well as to store and restore data specific to a certain instance of for example a problem. =head2 Storing And Retrieving Data X<store()>X<cstore()>X<restore()>Three of the most important functions 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. The data is stored in the user's data directory on the user's homeserver under the ID of the course. The hash that is returned by restore will have all of the previous value for all of the elements of the hash. Example: #creating a hash my %hash; $hash{'foo'}='bar'; #storing it &Apache::lonnet::cstore(\%hash); #changing a value $hash{'foo'}='notbar'; #adding a new value $hash{'bar'}='foo'; &Apache::lonnet::cstore(\%hash); #retrieving the hash my %history=&Apache::lonnet::restore(); #print the hash foreach my $key (sort(keys(%history))) { print("\%history{$key} = $history{$key}"); } Will print out: %history{1:foo} = bar %history{1:keys} = foo:timestamp %history{1:timestamp} = 990455579 %history{2:bar} = foo %history{2:foo} = notbar %history{2:keys} = foo:bar:timestamp %history{2:timestamp} = 990455580 %history{bar} = foo %history{foo} = notbar %history{timestamp} = 990455580 %history{version} = 2 Note that the special hash entries C<keys>, C<version> and C<timestamp> were added to the hash. C<version> will be equal to the total number of versions of the data that have been stored. The C<timestamp> attribute will be the UNIX time the hash was stored. C<keys> is available in every historical section to list which keys were added or changed at a specific historical revision of a hash. B<Warning>: do not store the hash that restore returns directly. This will cause a mess since it will restore the historical keys as if the were new keys. I.E. 1:foo will become 1:1:foo etc. 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 =back =head1 PUBLIC SUBROUTINES =head2 Session Environment Functions =over 4 =item * X<appenv()> B<appenv(%hash)>: the value of %hash is written to the user envirnoment file, and will be restored for each access this user makes during this session, also modifies the %ENV for the current process =item * X<delenv()> B<delenv($regexp)>: removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV. =back =head2 User Information =over 4 =item * X<queryauthenticate()> B<queryauthenticate($uname,$udom)>: try to determine user's current authentication scheme =item * X<authenticate()> B<authenticate($uname,$upass,$udom)>: try to authenticate user from domain's lib servers (first use the current one). C<$upass> should be the users password. =item * X<homeserver()> B<homeserver($uname,$udom)>: find the server which has the user's directory and files (there must be only one), this caches the answer, and also caches if there is a borken connection. =item * X<idget()> B<idget($udom,@ids)>: find the usernames behind a list of IDs (IDs are a unique resource in a domain, there must be only 1 ID per username, and only 1 username per ID in a specific domain) (returns hash: id=>name,id=>name) =item * X<idrget()> B<idrget($udom,@unames)>: find the IDs behind a list of usernames (returns hash: name=>id,name=>id) =item * X<idput()> B<idput($udom,%ids)>: store away a list of names and associated IDs =item * X<rolesinit()> B<rolesinit($udom,$username,$authhost)>: get user privileges =item * X<getsection()> B<getsection($udom,$uname,$cname)>: finds the section of student in the course $cname, return section name/number or '' for "not in course" and '-1' for "no section" =item * X<userenvironment()> B<userenvironment($udom,$uname,@what)>: gets the values of the keys passed in @what from the requested user's environment, returns a hash =back =head2 User Roles =over 4 =item * allowed($priv,$uri) : check for a user privilege; returns codes for allowed actions F: full access U,I,K: authentication modes (cxx only) '': forbidden 1: user needs to choose course 2: browse allowed =item * definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom role rolename set privileges in format of lonTabs/roles.tab for system, domain, and course level =item * plaintext($short) : return value in %prp hash (rolesplain.tab); plain text explanation of a user role term =back =head2 User Modification =over 4 =item * assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a user for the level given by URL. Optional start and end dates (leave empty string or zero for "no date") =item * changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to change a users, password, possible return values are: ok, pwchange_failure, non_authorized, auth_mode_error, unknown_user, refused =item * modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication =item * modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) : modify user =item * modifystudent modify a students enrollment and identification information. The course id is resolved based on the current users environment. This means the envoking user must be a course coordinator or otherwise associated with a course. This call is essentially a wrapper for lonnet::modifyuser and lonnet::modify_student_enrollment Inputs: =over 4 =item B<$udom> Students loncapa domain =item B<$uname> Students loncapa login name =item B<$uid> Students id/student number =item B<$umode> Students authentication mode =item B<$upass> Students password =item B<$first> Students first name =item B<$middle> Students middle name =item B<$last> Students last name =item B<$gene> Students generation =item B<$usec> Students section in course =item B<$end> Unix time of the roles expiration =item B<$start> Unix time of the roles start date =item B<$forceid> If defined, allow $uid to be changed =item B<$desiredhome> server to use as home server for student =back =item * modify_student_enrollment Change a students enrollment status in a class. The environment variable 'role.request.course' must be defined for this function to proceed. Inputs: =over 4 =item $udom, students domain =item $uname, students name =item $uid, students user id =item $first, students first name =item $middle =item $last =item $gene =item $usec =item $end =item $start =back =item * assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign custom role; give a custom role to a user for the level given by URL. Specify name and domain of role author, and role name =item * revokerole($udom,$uname,$url,$role) : revoke a role for url =item * revokecustomrole($udom,$uname,$url,$role) : revoke a custom role =back =head2 Course Infomation =over 4 =item * coursedescription($courseid) : course description =item * courseresdata($coursenum,$coursedomain,@which) : request for current parameter setting for a specific course, @what should be a list of parameters to ask about. This routine caches answers for 5 minutes. =back =head2 Course Modification =over 4 =item * writecoursepref($courseid,%prefs) : write preferences (environment database) for a course =item * createcourse($udom,$description,$url) : make/modify course =back =head2 Resource Subroutines =over 4 =item * subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead) =item * repcopy($filename) : subscribes to the requested file, and attempts to replicate from the owning library server, Might return 'unavailable', 'not_found', 'forbidden', 'ok', or 'bad_request', also attempts to grab the metadata for the resource. Expects the local filesystem pathname (/home/httpd/html/res/....) =back =head2 Resource Information =over 4 =item * EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of a vairety of different possible values, $varname should be a request string, and the other parameters can be used to specify who and what one is asking about. Possible values for $varname are environment.lastname (or other item from the envirnment hash), user.name (or someother aspect about the user), resource.0.maxtries (or some other part and parameter of a resource) =item * directcondval($number) : get current value of a condition; reads from a state string =item * condval($condidx) : value of condition index based on state =item * metadata($uri,$what,$liburi,$prefix,$depthcount) : request a resource's metadata, $what should be either a specific key, or either 'keys' (to get a list of possible keys) or 'packages' to get a list of packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata. this function automatically caches all requests =item * metadata_query($query,$custom,$customshow) : make a metadata query against the network of library servers; returns file handle of where SQL and regex results will be stored for query =item * symbread($filename) : return symbolic list entry (filename argument optional); returns the data handle =item * symbverify($symb,$thisfn) : verifies that $symb actually exists and is a possible symb for the URL in $thisfn, and if is an encryypted resource that the user accessed using /enc/ returns a 1 on success, 0 on failure, user must be in a course, as it assumes the existance of the course initial hash, and uses $ENV('request.course.id'} =item * symbclean($symb) : removes versions numbers from a symb, returns the cleaned symb =item * is_on_map($uri) : checks if the $uri is somewhere on the current course map, user must be in a course for it to work. =item * numval($salt) : return random seed value (addend for rndseed) =item * rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns a random seed, all arguments are optional, if they aren't sent it uses the environment to derive them. Note: if symb isn't sent and it can't get one from &symbread it will use the current time as its return value =item * ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique, unfakeable, receipt =item * receipt() : API to ireceipt working off of ENV values; given out to users =item * countacc($url) : count the number of accesses to a given URL =item * checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource =item * checkin($token) : updates that a resource has beeen returned (a hard copy version for instance) and returns the data that $token was Checkout with ($symb, $tuname, $tudom, and $tcrsid) =item * expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet =item * devalidate($symb) : devalidate temporary spreadsheet calculations, forcing spreadsheet to reevaluate the resource scores next time. =back =head2 Storing/Retreiving Data =over 4 =item * store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently for this url; hashref needs to be given and should be a \%hashname; the remaining args aren't required and if they aren't passed or are '' they will be derived from the ENV =item * cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but uses critical subroutine =item * restore($symb,$namespace,$udom,$uname) : returns hash for this symb; all args are optional =item * tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that works very similar to store/cstore, but all data is stored in a temporary location and can be reset using tmpreset, $storehash should be a hash reference, returns nothing on success =item * tmprestore($symb,$namespace,$udom,$uname) : storage that works very similar to restore, but all data is stored in a temporary location and can be reset using tmpreset. Returns a hash of values on success, error string otherwise. =item * tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset, deltes all keys for $symb form the temporary storage hash. =item * get($namespace,$storearr,$udom,$uname) : returns hash with keys from array reference filled in from namesp ($udom and $uname are optional) =item * del($namespace,$storearr,$udom,$uname) : deletes keys out of array from namesp ($udom and $uname are optional) =item * dump($namespace,$udom,$uname,$regexp) : dumps the complete (or key matching regexp) namespace into a hash ($udom, $uname and $regexp are optional) =item * inc($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,$uname) : stores hash in namesp ($udom and $uname are optional) =item * putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp keys used in storehash include version information (e.g., 1:$symb:message etc.) as used in records written by &store and retrieved by &restore. This function was created for use in editing discussion posts, without incrementing the version number included in the key for a particular post. The colon separated list of attribute names (e.g., the value associated with the key 1:keys:$symb) is also generated and passed in the ampersand separated items sent to lonnet::reply(). =item * cput($namespace,$storehash,$udom,$uname) : critical put ($udom and $uname are optional) =item * eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array reference filled in from namesp (encrypts the return communication) ($udom and $uname are optional) =item * log($udom,$name,$home,$message) : write to permanent log for user; use critical subroutine =back =head2 Network Status Functions =over 4 =item * dirlist($uri) : return directory list based on URI =item * spareserver() : find server with least workload from spare.tab =back =head2 Apache Request =over 4 =item * ssi($url,%hash) : server side include, does a complete request cycle on url to localhost, posts hash =back =head2 Data to String to Data =over 4 =item * hash2str(%hash) : convert a hash into a string complete with escaping and '=' and '&' separators, supports elements that are arrayrefs and hashrefs =item * hashref2str($hashref) : convert a hashref into a string complete with escaping and '=' and '&' separators, supports elements that are arrayrefs and hashrefs =item * arrayref2str($arrayref) : convert an arrayref into a string complete with escaping and '&' separators, supports elements that are arrayrefs and hashrefs =item * str2hash($string) : convert string to hash using unescaping and splitting on '=' and '&', supports elements that are arrayrefs and hashrefs =item * str2array($string) : convert string to hash using unescaping and splitting on '&', supports elements that are arrayrefs and hashrefs =back =head2 Logging Routines =over 4 These routines allow one to make log messages in the lonnet.log and lonnet.perm logfiles. =item * logtouch() : make sure the logfile, lonnet.log, exists =item * logthis() : append message to the normal lonnet.log file, it gets preiodically rolled over and deleted. =item * logperm() : append a permanent message to lonnet.perm.log, this log file never gets deleted by any automated portion of the system, only messages of critical importance should go in here. =back =head2 General File Helper Routines =over 4 =item * getfile($file,$caller) : two cases - requests for files in /res or in /uploaded. (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 $caller is 'uploadrep': This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase) for request for files originally uploaded via DOCS. - returns 'ok' if fresh local copy now available, -1 otherwise. Otherwise: This indicates a call from the content generation phase of the request. - returns the entire contents of the file or -1. (b) files in /res - returns the entire contents of a file or -1; it properly subscribes to and replicates the file if neccessary. =item * filelocation($dir,$file) : returns file system location of a file based on URI; meant to be "fairly clean" absolute reference, $dir is a directory that relative $file lookups are to looked in ($dir of /a/dir and a file of ../bob will become /a/bob) =item * hreflocation($dir,$file) : returns file system location or a URL; same as filelocation except for hrefs =item * declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc) =back =head2 Usererfile file routines (/uploaded*) =over 4 =item * userfileupload(): main rotine for putting a file in a user or course's filespace, arguments are, formname - required - this is the name of the element in $ENV where the filename, and the contents of the file to create/modifed exist the filename is in $ENV{'form.'.$formname.'.filename'} and the contents of the file is located in $ENV{'form.'.$formname} coursedoc - if true, store the file in the course of the active role of the current user subdir - required - subdirectory to put the file in under ../userfiles/ if undefined, it will be placed in "unknown" (This routine calls clean_filename() to remove any dangerous characters from the filename, and then calls finuserfileupload() to complete the transaction) returns either the url of the uploaded file (/uploaded/....) if successful and /adm/notfound.html if unsuccessful =item * clean_filename(): routine for cleaing a filename up for storage in userfile space, argument is: filename - proposed filename returns: the new clean filename =item * finishuserfileupload(): routine that creaes and sends the file to userspace, probably shouldn't be called directly docuname: username or courseid of destination for the file docudom: domain of user/course of destination for the file docuhome: loncapa id of the library server that is getting the file formname: same as for userfileupload() fname: filename (inculding subdirectories) for the file returns either the url of the uploaded file (/uploaded/....) if successful and /adm/notfound.html if unsuccessful =item * renameuserfile(): renames an existing userfile to a new name Args: docuname: username or courseid of destination for the file docudom: domain of user/course of destination for the file old: current file name (including any subdirs under userfiles) new: desired file name (including any subdirs under userfiles) =item * mkdiruserfile(): creates a directory is a userfiles dir Args: docuname: username or courseid of destination for the file docudom: domain of user/course of destination for the file dir: dir to create (including any subdirs under userfiles) =item * removeuserfile(): removes a file that exists in userfiles Args: docuname: username or courseid of destination for the file docudom: domain of user/course of destination for the file fname: filname to delete (including any subdirs under userfiles) =item * removeuploadedurl(): convience function for removeuserfile() Args: url: a full /uploaded/... url to delete =back =head2 HTTP Helper Routines =over 4 =item * escape() : unpack non-word characters into CGI-compatible hex codes =item * unescape() : pack CGI-compatible hex codes into actual non-word ASCII character =back =head1 PRIVATE SUBROUTINES =head2 Underlying communication routines (Shouldn't call) =over 4 =item * subreply() : tries to pass a message to lonc, returns con_lost if incapable =item * reply() : uses subreply to send a message to remote machine, logs all failures =item * critical() : passes a critical message to another server; if cannot get through then place message in connection buffer directory and returns con_delayed, if incapable of saving message, returns con_failed =item * reconlonc() : tries to reconnect lonc client processes. =back =head2 Resource Access Logging =over 4 =item * flushcourselogs() : flush (save) buffer logs and access logs =item * courselog($what) : save message for course in hash =item * courseacclog($what) : save message for course using &courselog(). Perform special processing for specific resource types (problems, exams, quizzes, etc). =item * goodbye() : flush course logs and log shutting down; it is called in srm.conf as a PerlChildExitHandler =back =head2 Other =over 4 =item * symblist($mapname,%newhash) : update symbolic storage links =back =cut