--- loncom/lonnet/perl/lonnet.pm 2000/10/06 21:00:05 1.37 +++ loncom/lonnet/perl/lonnet.pm 2000/11/29 12:27:49 1.74 @@ -24,27 +24,45 @@ # revokerole (udom,uname,url,role) : Revoke a role for url # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role # appenv(hash) : adds hash to session environment +# delenv(varname) : deletes all environment entries starting with varname # store(hash) : stores hash permanently for this url +# cstore(hash) : critical store # restore : returns hash for this url # eget(namesp,array) : returns hash with keys from array filled in from namesp # get(namesp,array) : returns hash with keys from array filled in from namesp -# del(namesp,array) : deletes keys out of arry from namesp +# del(namesp,array) : deletes keys out of array from namesp # put(namesp,hash) : stores hash in namesp +# cput(namesp,hash) : critical put # dump(namesp) : dumps the complete namespace into a hash # ssi(url,hash) : does a complete request cycle on url to localhost, posts # hash # coursedescription(id) : returns and caches course description for id # repcopy(filename) : replicate file # dirlist(url) : gets a directory listing +# directcondval(index) : reading condition value of single condition from +# state string # condval(index) : value of condition index based on state -# varval(name) : value of a variable -# refreshstate() : refresh the state information string +# EXT(name) : value of a variable # symblist(map,hash) : Updates symbolic storage links +# symbread([filename]) : returns the data handle (filename optional) # rndseed() : returns a random seed # getfile(filename) : returns the contents of filename, or a -1 if it can't # be found, replicates and subscribes to the file # filelocation(dir,file) : returns a farily clean absolute reference to file # from the directory dir +# hreflocation(dir,file) : same as filelocation, but for hrefs +# log(domain,user,home,msg) : write to permanent log for user +# usection(domain,user,courseid) : output of section name/number or '' for +# "not in course" and '-1' for "no section" +# userenvironment(domain,user,what) : puts out any environment parameter +# for a user +# idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id) +# idget(domain,array): returns hash with usernames (id=>name,id=>name) for +# an array of IDs +# idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for +# an array of names +# metadata(file,entry): returns the metadata entry for a file. entry='keys' +# returns a comma separated list of keys # # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30, # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19, @@ -59,7 +77,9 @@ # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer # 10/04 Gerd Kortemeyer # 10/04 Guy Albertelli -# 10/06 Gerd Kortemeyer +# 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29, +# 10/30,10/31, +# 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27 Gerd Kortemeyer package Apache::lonnet; @@ -68,10 +88,11 @@ use Apache::File; use LWP::UserAgent(); use HTTP::Headers; use vars -qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit); +qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache); use IO::Socket; use GDBM_File; use Apache::Constants qw(:common :http); +use HTML::TokeParser; # --------------------------------------------------------------------- Logging @@ -114,8 +135,7 @@ sub reply { my ($cmd,$server)=@_; my $answer=subreply($cmd,$server); if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); } - if (($answer=~/^error:/) || ($answer=~/^refused/) || - ($answer=~/^rejected/)) { + if (($answer=~/^refused/) || ($answer=~/^rejected/)) { &logthis("WARNING:". " $cmd to $server returned $answer"); } @@ -242,6 +262,35 @@ sub appenv { } return 'ok'; } +# ----------------------------------------------------- Delete from Environment + +sub delenv { + my $delthis=shift; + my %newenv=(); + if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) { + &logthis("WARNING: ". + "Attempt to delete from environment ".$delthis); + return 'error'; + } + my @oldenv; + { + my $fh; + unless ($fh=Apache::File->new("$ENV{'user.environment'}")) { + return 'error'; + } + @oldenv=<$fh>; + } + { + my $fh; + unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) { + return 'error'; + } + map { + unless ($_=~/^$delthis/) { print $fh $_; } + } @oldenv; + } + return 'ok'; +} # ------------------------------ Find server with least workload from spare.tab @@ -320,6 +369,111 @@ sub homeserver { return 'no_host'; } +# ------------------------------------- Find the usernames behind a list of IDs + +sub idget { + my ($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 ($reply ne 'con_lost') { + @answer=split(/\&/,$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=(); + map { + $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1]; + } @unames; + return %returnhash; +} + +# ------------------------------- Store away a list of names and associated IDs + +sub idput { + my ($udom,%ids)=@_; + my %servers=(); + map { + 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; + } + &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom); + } + } keys %ids; + map { + &critical('idput:'.$udom.':'.$servers{$_},$_); + } keys %servers; +} + +# ------------------------------------- Find the section of student in a course + +sub usection { + my ($udom,$unam,$courseid)=@_; + $courseid=~s/\_/\//g; + $courseid=~s/^(\w)/\/$1/; + map { + my ($key,$value)=split(/\=/,$_); + $key=&unescape($key); + if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) { + my $section=$1; + if ($key eq $courseid.'_st') { $section=''; } + my ($dummy,$end,$start)=split(/\_/,&unescape($value)); + my $now=time; + my $notactive=0; + if ($start) { + if ($now<$start) { $notactive=1; } + } + if ($end) { + if ($now>$end) { $notactive=1; } + } + unless ($notactive) { return $section; } + } + } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles', + &homeserver($unam,$udom))); + return '-1'; +} + +# ------------------------------------- Read an entry from a user's environment + +sub userenvironment { + my ($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; +} + # ----------------------------- Subscribe to a resource, return URL if possible sub subscribe { @@ -332,6 +486,9 @@ sub subscribe { return 'not_found'; } my $answer=reply("sub:$fname",$home); + if (($answer eq 'con_lost') || ($answer eq 'rejected')) { + $answer.=' by '.$home; + } return $answer; } @@ -343,14 +500,14 @@ sub repcopy { my $transname="$filename.in.transfer"; if ((-e $filename) || (-e $transname)) { return OK; } my $remoteurl=subscribe($filename); - if ($remoteurl eq 'con_lost') { - &logthis("Subscribe returned con_lost: $filename"); + if ($remoteurl =~ /^con_lost by/) { + &logthis("Subscribe returned $remoteurl: $filename"); return HTTP_SERVICE_UNAVAILABLE; } elsif ($remoteurl eq 'not_found') { &logthis("Subscribe returned not_found: $filename"); return HTTP_NOT_FOUND; - } elsif ($remoteurl eq 'rejected') { - &logthis("Subscribe returned rejected: $filename"); + } elsif ($remoteurl =~ /^rejected by/) { + &logthis("Subscribe returned $remoteurl: $filename"); return FORBIDDEN; } elsif ($remoteurl eq 'directory') { return OK; @@ -420,7 +577,7 @@ sub ssi { sub log { my ($dom,$nam,$hom,$what)=@_; - return reply("log:$dom:$nam:$what",$hom); + return critical("log:$dom:$nam:$what",$hom); } # ----------------------------------------------------------------------- Store @@ -428,7 +585,7 @@ sub log { sub store { my %storehash=@_; my $symb; - unless ($symb=escape(&symbread($ENV{'request.filename'}))) { return ''; } + unless ($symb=escape(&symbread())) { return ''; } my $namespace; unless ($namespace=$ENV{'request.course.id'}) { return ''; } my $namevalue=''; @@ -441,11 +598,29 @@ sub store { "$ENV{'user.home'}"); } +# -------------------------------------------------------------- Critical Store + +sub cstore { + my %storehash=@_; + my $symb; + unless ($symb=escape(&symbread())) { return ''; } + my $namespace; + unless ($namespace=$ENV{'request.course.id'}) { return ''; } + my $namevalue=''; + map { + $namevalue.=escape($_).'='.escape($storehash{$_}).'&'; + } keys %storehash; + $namevalue=~s/\&$//; + return critical( + "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue", + "$ENV{'user.home'}"); +} + # --------------------------------------------------------------------- Restore sub restore { my $symb; - unless ($symb=escape(&symbread($ENV{'request.filename'}))) { return ''; } + unless ($symb=escape(&symbread())) { return ''; } my $namespace; unless ($namespace=$ENV{'request.course.id'}) { return ''; } my $answer=reply( @@ -467,12 +642,15 @@ sub restore { sub coursedescription { my $courseid=shift; $courseid=~s/^\///; + $courseid=~s/\_/\//g; my ($cdomain,$cnum)=split(/\//,$courseid); my $chome=homeserver($cnum,$cdomain); if ($chome ne 'no_host') { my $rep=reply("dump:$cdomain:$cnum:environment",$chome); if ($rep ne 'con_lost') { - my %cachehash=(); + my $normalid=$courseid; + $normalid=~s/\//\_/g; + my %envhash=(); my %returnhash=('home' => $chome, 'domain' => $cdomain, 'num' => $cnum); @@ -481,14 +659,16 @@ sub coursedescription { $name=&unescape($name); $value=&unescape($value); $returnhash{$name}=$value; - if ($name eq 'description') { - $cachehash{$courseid}=$value; - } + $envhash{'course.'.$normalid.'.'.$name}=$value; } split(/\&/,$rep); $returnhash{'url'}='/res/'.declutter($returnhash{'url'}); $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'. - $ENV{'user.name.'}.'_'.$cdomain.'_'.$cnum; - put ('coursedescriptions',%cachehash); + $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum; + $envhash{'course.'.$normalid.'.last_cache'}=time; + $envhash{'course.'.$normalid.'.home'}=$chome; + $envhash{'course.'.$normalid.'.domain'}=$cdomain; + $envhash{'course.'.$normalid.'.num'}=$cnum; + &appenv(%envhash); return %returnhash; } } @@ -526,6 +706,7 @@ sub rolesinit { } } if (($area ne '') && ($trole ne '')) { + my $spec=$trole.'.'.$area; my ($tdummy,$tdomain,$trest)=split(/\//,$area); if ($trole =~ /^cr\//) { my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole); @@ -537,21 +718,27 @@ sub rolesinit { if (($roledef ne 'con_lost') && ($roledef ne '')) { my ($syspriv,$dompriv,$coursepriv)= split(/\_/,unescape($roledef)); - $allroles{'/'}.=':'.$syspriv; + $allroles{'cm./'}.=':'.$syspriv; + $allroles{$spec.'./'}.=':'.$syspriv; if ($tdomain ne '') { - $allroles{'/'.$tdomain.'/'}.=':'.$dompriv; + $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv; + $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv; if ($trest ne '') { - $allroles{$area}.=':'.$coursepriv; + $allroles{'cm.'.$area}.=':'.$coursepriv; + $allroles{$spec.'.'.$area}.=':'.$coursepriv; } } } } } else { - $allroles{'/'}.=':'.$pr{$trole.':s'}; + $allroles{'cm./'}.=':'.$pr{$trole.':s'}; + $allroles{$spec.'./'}.=':'.$pr{$trole.':s'}; if ($tdomain ne '') { - $allroles{'/'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; + $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; + $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; if ($trest ne '') { - $allroles{$area}.=':'.$pr{$trole.':c'}; + $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'}; + $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'}; } } } @@ -593,10 +780,11 @@ sub get { $ENV{'user.home'}); my @pairs=split(/\&/,$rep); my %returnhash=(); + my $i=0; map { - my ($key,$value)=split(/=/,$_); - $returnhash{unescape($key)}=unescape($value); - } @pairs; + $returnhash{$_}=unescape($pairs[$i]); + $i++; + } @storearr; return %returnhash; } @@ -641,6 +829,20 @@ sub put { $ENV{'user.home'}); } +# ------------------------------------------------------ critical put interface + +sub cput { + my ($namespace,%storehash)=@_; + my $items=''; + map { + $items.=escape($_).'='.escape($storehash{$_}).'&'; + } keys %storehash; + $items=~s/\&$//; + return critical + ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items", + $ENV{'user.home'}); +} + # -------------------------------------------------------------- eget interface sub eget { @@ -654,10 +856,11 @@ sub eget { $ENV{'user.home'}); my @pairs=split(/\&/,$rep); my %returnhash=(); + my $i=0; map { - my ($key,$value)=split(/=/,$_); - $returnhash{unescape($key)}=unescape($value); - } @pairs; + $returnhash{$_}=unescape($pairs[$i]); + $i++; + } @storearr; return %returnhash; } @@ -665,111 +868,227 @@ sub eget { sub allowed { my ($priv,$uri)=@_; - $uri=~s/^\/res//; - $uri=~s/^\///; + $uri=&declutter($uri); -# Free bre access to adm resources +# Free bre access to adm and meta resources - if (($uri=~/^adm\//) && ($priv eq 'bre')) { + if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) { return 'F'; } -# Gather priviledges over system and domain - my $thisallowed=''; - if ($ENV{'user.priv./'}=~/$priv\&([^\:]*)/) { + my $statecond=0; + my $courseprivid=''; + +# Course + + if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) { + $thisallowed.=$1; + } + +# Domain + + if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'} + =~/$priv\&([^\:]*)/) { $thisallowed.=$1; } - if ($ENV{'user.priv./'.(split(/\//,$uri))[0].'/'}=~/$priv\&([^\:]*)/) { + +# Course: uri itself is a course + my $courseuri=$uri; + $courseuri=~s/\_(\d)/\/$1/; + if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseuri} + =~/$priv\&([^\:]*)/) { $thisallowed.=$1; } -# Full access at system or domain level? Exit. +# Full access at system, domain or course-wide level? Exit. if ($thisallowed=~/F/) { return 'F'; } -# The user does not have full access at system or domain level -# Course level access control +# If this is generating or modifying users, exit with special codes -# uri itself refering to a course? - - if ($uri=~/\.course$/) { - if ($ENV{'user.priv./'.$uri}=~/$priv\&([^\:]*)/) { - $thisallowed.=$1; + if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) { + return $thisallowed; + } +# +# Gathered so far: system, domain and course wide priviledges +# +# Course: See if uri or referer is an individual resource that is part of +# the course + + if ($ENV{'request.course.id'}) { + $courseprivid=$ENV{'request.course.id'}; + if ($ENV{'request.course.sec'}) { + $courseprivid.='/'.$ENV{'request.course.sec'}; } -# Full access on course level? Exit. - if ($thisallowed=~/F/) { - return 'F'; + $courseprivid=~s/\_/\//; + my $checkreferer=1; + my @uriparts=split(/\//,$uri); + my $filename=$uriparts[$#uriparts]; + my $pathname=$uri; + $pathname=~s/\/$filename$//; + if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~ + /\&$filename\:([\d\|]+)\&/) { + $statecond=$1; + if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid} + =~/$priv\&([^\:]*)/) { + $thisallowed.=$1; + $checkreferer=0; + } } -# uri is refering to an individual resource; user needs to be in a course + if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) { + my $refuri=$ENV{'HTTP_REFERER'}; + $refuri=~s/^http\:\/\/$ENV{'request.host'}//i; + $refuri=&declutter($refuri); + my @uriparts=split(/\//,$refuri); + my $filename=$uriparts[$#uriparts]; + my $pathname=$refuri; + $pathname=~s/\/$filename$//; + my @filenameparts=split(/\./,$uri); + if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') { + if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~ + /\&$filename\:([\d\|]+)\&/) { + my $refstatecond=$1; + if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid} + =~/$priv\&([^\:]*)/) { + $thisallowed.=$1; + $uri=$refuri; + $statecond=$refstatecond; + } + } + } + } + } - } else { +# +# Gathered now: all priviledges that could apply, and condition number +# +# +# Full or no access? +# - unless(defined($ENV{'request.course.id'})) { - return '1'; - } + if ($thisallowed=~/F/) { + return 'F'; + } -# Get access priviledges for course + unless ($thisallowed) { + return ''; + } - if ($ENV{'user.priv./'.$ENV{'request.course.id'}}=~/$priv\&([^\:]*)/) { - $thisallowed.=$1; - } +# Restrictions exist, deal with them +# +# C:according to course preferences +# R:according to resource settings +# L:unless locked +# X:according to user session state +# -# See if resource or referer is part of this course - - my @uriparts=split(/\//,$uri); - my $urifile=$uriparts[$#uriparts]; - $urifile=~/\.(\w+)$/; - my $uritype=$1; - $#uriparts--; - my $uripath=join('/',@uriparts); - my $uricond=-1; - if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$uripath}=~ - /\&$urifile\:(\d+)\&/) { - $uricond=$1; - } elsif (($fe{$uritype} eq 'emb') || ($fe{$uritype} eq 'img')) { - my $refuri=$ENV{'HTTP_REFERER'}; - $refuri=~s/^\/res//; - $refuri=~s/^\///; - @uriparts=split(/\//,$refuri); - $urifile=$uriparts[$#uriparts]; - $#uriparts--; - $uripath=join('/',@uriparts); - if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$uripath}=~ - /\&$urifile\:(\d+)\&/) { - $uricond=$1; - } +# 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; + 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'}=~/\,$csec\,/) + || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) { + if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) { + &log($ENV{'user.domain'},$ENV{'user.name'}, + $ENV{'user.host'}, + 'Locked by res: '.$priv.' for '.$uri.' due to '. + $cdom.'/'.$cnum.'/'.$csec.' expire '. + $ENV{$prefix.'priv.'.$priv.'.lock.expire'}); + return ''; + } + } + if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/) + || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) { + if ($ENV{'priv.'.$priv.'.lock.expire'}>time) { + &log($ENV{'user.domain'},$ENV{'user.name'}, + $ENV{'user.host'}, + 'Locked by priv: '.$priv.' for '.$uri.' due to '. + $cdom.'/'.$cnum.'/'.$csec.' expire '. + $ENV{$prefix.'priv.'.$priv.'.lock.expire'}); + return ''; + } + } + } } + } + +# +# Rest of the restrictions depend on selected course +# - if ($uricond>=0) { + unless ($ENV{'request.course.id'}) { + return '1'; + } -# The resource is part of the course -# If user had full access on course level, go ahead +# +# Now user is definitely in a course +# - if ($thisallowed=~/F/) { - return 'F'; - } -# Restricted by state? +# Course preferences - if ($thisallowed=~/X/) { - if (&condval($uricond)>1) { - return '2'; - } else { - return ''; - } + if ($thisallowed=~/C/) { + my $rolecode=(split(/\./,$ENV{'request.role'}))[0]; + if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'} + =~/\,$rolecode\,/) { + &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'}, + 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '. + $ENV{'request.course.id'}); + return ''; + } + } + +# Resource preferences + + if ($thisallowed=~/R/) { + my $rolecode=(split(/\./,$ENV{'request.role'}))[0]; + my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta'; + if (-e $filename) { + my @content; + { + my $fh=Apache::File->new($filename); + @content=<$fh>; } + if (join('',@content)=~ + /\]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) { + &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'}, + 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode); + return ''; + + } } - } - return $thisallowed; -} + } -# ---------------------------------------------------------- Refresh State Info +# Restricted by state? + + if ($thisallowed=~/X/) { + if (&condval($statecond)) { + return '2'; + } else { + return ''; + } + } -sub refreshstate { + return 'F'; } # ----------------------------------------------------------------- Define Role @@ -830,7 +1149,7 @@ sub fileembstyle { # ------------------------------------------------------------ Description Text -sub filedecription { +sub filedescription { my $ending=shift; return $fd{$ending}; } @@ -939,11 +1258,28 @@ sub dirlist { # -------------------------------------------------------- Value of a Condition +sub directcondval { + my $number=shift; + if ($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 $allpathcond=''; + map { + if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) { + $allpathcond.= + '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|'; + } + } split(/\|/,$condidx); + $allpathcond=~s/\|$//; if ($ENV{'request.course.id'}) { - if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$condidx})) { + if ($allpathcond) { my $operand='|'; my @stack; map { @@ -959,16 +1295,14 @@ sub condval { } elsif (($_ eq '&') || ($_ eq '|')) { $operand=$_; } else { - my $new= - substr($ENV{'user.state.'.$ENV{'request.course.id'}},$_,1); + my $new=directcondval($_); if ($operand eq '&') { $result=$result>$new?$new:$result; } else { $result=$result>$new?$result:$new; } } - } ($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$condidx}=~ - /(\d+|\(|\)|\&|\|)/g); + } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g); } } return $result; @@ -976,21 +1310,203 @@ sub condval { # --------------------------------------------------------- Value of a Variable -sub varval { - my ($realm,$space,@components)=split(/\./,shift); - my $value=''; +sub EXT { + my $varname=shift; + unless ($varname) { return ''; } + my ($realm,$space,$qualifier,@therest)=split(/\./,$varname); + my $rest; + if ($therest[0]) { + $rest=join('.',@therest); + } else { + $rest=''; + } + my $qualifierrest=$qualifier; + if ($rest) { $qualifierrest.='.'.$rest; } + my $spacequalifierrest=$space; + if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; } if ($realm eq 'user') { - if ($space=~/^resource/) { - $space=~s/^resource\[//; - $space=~s/\]$//; - +# --------------------------------------------------------------- user.resource + if ($space eq 'resource') { + my %restored=&restore; + return $restored{$qualifierrest}; +# ----------------------------------------------------------------- user.access + } elsif ($space eq 'access') { + return &allowed($qualifier,$rest); +# ------------------------------------------ user.preferences, user.environment + } elsif (($space eq 'preferences') || ($space eq 'environment')) { + return $ENV{join('.',('environment',$qualifierrest))}; +# ----------------------------------------------------------------- user.course + } elsif ($space eq 'course') { + return $ENV{join('.',('request.course',$qualifier))}; +# ------------------------------------------------------------------- user.role + } elsif ($space eq 'role') { + my ($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 $ENV{'user.domain'}; +# ------------------------------------------------------------------- user.name + } elsif ($space eq 'name') { + return $ENV{'user.name'}; +# ---------------------------------------------------- Any other user namespace + } else { + my $item=($rest)?$qualifier.'.'.$rest:$qualifier; + my %reply=&get($space,$item); + return $reply{$item}; + } + } elsif ($realm eq 'request') { +# ------------------------------------------------------------- request.browser + if ($space eq 'browser') { + return $ENV{'browser.'.$qualifier}; +# ------------------------------------------------------------ request.filename } else { + return $ENV{'request.'.$spacequalifierrest}; } } elsif ($realm eq 'course') { - } elsif ($realm eq 'session') { +# ---------------------------------------------------------- course.description + my $section=''; + if ($ENV{'request.course.sec'}) { + $section='_'.$ENV{'request.course.sec'}; + } + return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'. + $spacequalifierrest}; + } elsif ($realm eq 'resource') { + if ($ENV{'request.course.id'}) { +# ----------------------------------------------------- Cascading lookup scheme + my $symbp=&symbread(); + my $mapp=(split(/\_\_\_/,$symbp))[0]; + + my $symbparm=$symbp.'.'.$spacequalifierrest; + my $mapparm=$mapp.'___(all).'.$spacequalifierrest; + + my $seclevel= + $ENV{'request.course.id'}.'.['. + $ENV{'request.course.sec'}.'].'.$spacequalifierrest; + my $seclevelr= + $ENV{'request.course.id'}.'.['. + $ENV{'request.course.sec'}.'].'.$symbparm; + my $seclevelm= + $ENV{'request.course.id'}.'.['. + $ENV{'request.course.sec'}.'].'.$mapparm; + + my $courselevel= + $ENV{'request.course.id'}.'.'.$spacequalifierrest; + my $courselevelr= + $ENV{'request.course.id'}.'.'.$symbparm; + my $courselevelm= + $ENV{'request.course.id'}.'.'.$mapparm; + + +# ----------------------------------------------------------- first, check user + my %resourcedata=get('resourcedata', + ($courselevelr,$courselevelm,$courselevel)); + if ($resourcedata{$courselevelr}!~/^error\:/) { + + if ($resourcedata{$courselevelr}) { + return $resourcedata{$courselevelr}; } + if ($resourcedata{$courselevelm}) { + return $resourcedata{$courselevelm}; } + if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; } + + } +# -------------------------------------------------------- second, check course + my $section=''; + if ($ENV{'request.course.sec'}) { + $section='_'.$ENV{'request.course.sec'}; + } + my $reply=&reply('get:'. + $ENV{'course.'.$ENV{'request.course.id'}.$section.'.domain'}.':'. + $ENV{'course.'.$ENV{'request.course.id'}.$section.'.num'}. + ':resourcedata:'. + escape($seclevelr).':'.escape($seclevelm).':'.escape($seclevel).':'. + escape($courselevelr).':'.escape($courselevelm).':'.escape($courselevel), + $ENV{'course.'.$ENV{'request.course.id'}.$section.'.home'}); + if ($reply!~/^error\:/) { + map { + my ($name,$value)=split(/\=/,$_); + $resourcedata{unescape($name)}=unescape($value); + } split(/\&/,$reply); + + if ($resourcedata{$seclevelr}) { return $resourcedata{$seclevelr}; } + if ($resourcedata{$seclevelm}) { return $resourcedata{$seclevelm}; } + if ($resourcedata{$seclevel}) { return $resourcedata{$seclevel}; } + + if ($resourcedata{$courselevelr}) { + return $resourcedata{$courselevelr}; } + if ($resourcedata{$courselevelm}) { + return $resourcedata{$courselevelm}; } + if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; } + + } + +# ------------------------------------------------------ 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; } + } + +# --------------------------------------------- last, look in resource metadata + + my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest); + if ($metadata) { return $metadata; } + +# ---------------------------------------------------- Any other user namespace + } elsif ($realm eq 'environment') { +# ----------------------------------------------------------------- environment + return $ENV{$spacequalifierrest}; } elsif ($realm eq 'system') { +# ----------------------------------------------------------------- system.time + if ($space eq 'time') { + return time; + } + } + return ''; +} + +# ---------------------------------------------------------------- Get metadata + +sub metadata { + my ($uri,$what)=@_; + $uri=&declutter($uri); + my $filename=$uri; + $uri=~s/\.meta$//; + unless ($metacache{$uri.':keys'}) { + unless ($filename=~/\.meta$/) { $filename.='.meta'; } + my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename); + my $parser=HTML::TokeParser->new(\$metastring); + my $token; + while ($token=$parser->get_token) { + if ($token->[0] eq 'S') { + my $entry=$token->[1]; + my $unikey=$entry; + if (defined($token->[2]->{'part'})) { + $unikey.='_'.$token->[2]->{'part'}; + } + if (defined($token->[2]->{'name'})) { + $unikey.='_'.$token->[2]->{'name'}; + } + if ($metacache{$uri.':keys'}) { + $metacache{$uri.':keys'}.=','.$unikey; + } else { + $metacache{$uri.':keys'}=$unikey; + } + map { + $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_}; + } @{$token->[3]}; + $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry); + } + } } - return $value; + return $metacache{$uri.':'.$what}; } # ------------------------------------------------- Update symbolic store links @@ -1016,11 +1532,15 @@ sub symblist { # ------------------------------------------------------ Return symb list entry sub symbread { - my $thisfn=declutter(shift); + my $thisfn=shift; + unless ($thisfn) { + $thisfn=$ENV{'request.filename'}; + } + $thisfn=declutter($thisfn); my %hash; my %bighash; my $syval=''; - if (($ENV{'request.course.fn'}) && ($ENV{'request.filename'})) { + if (($ENV{'request.course.fn'}) && ($thisfn)) { if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', &GDBM_READER,0640)) { $syval=$hash{$thisfn}; @@ -1030,6 +1550,7 @@ sub symbread { if ($syval) { unless ($syval=~/\_\d+$/) { unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) { + &appenv('request.ambiguous' => $thisfn); return ''; } $syval.=$1; @@ -1040,21 +1561,41 @@ sub symbread { &GDBM_READER,0640)) { # ---------------------------------------------- Get ID(s) for current resource my $ids=$bighash{'ids_/res/'.$thisfn}; + unless ($ids) { + $ids=$bighash{'ids_/'.$thisfn}; + } if ($ids) { # ------------------------------------------------------------------- Has ID(s) my @possibilities=split(/\,/,$ids); - if ($#possibilities==1) { + if ($#possibilities==0) { +# ----------------------------------------------- There is only one possibility my ($mapid,$resid)=split(/\./,$ids); $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid; } else { - $syval=''; +# ------------------------------------------ There is more than one possibility + my $realpossible=0; + map { + 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; + } + } + } @possibilities; + if ($realpossible!=1) { $syval=''; } } } untie(%bighash) } } - return $syval.'___'.$thisfn; + if ($syval) { + return $syval.'___'.$thisfn; + } } + &appenv('request.ambiguous' => $thisfn); return ''; } @@ -1074,7 +1615,7 @@ sub numval { sub rndseed { my $symb; - unless ($symb=&symbread($ENV{'request.filename'})) { return ''; } + unless ($symb=&symbread()) { return time; } my $symbchck=unpack("%32C*",$symb); my $symbseed=numval($symb)%$symbchck; my $namechck=unpack("%32C*",$ENV{'user.name'}); @@ -1103,19 +1644,34 @@ sub filelocation { my ($dir,$file) = @_; my $location; $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces - $file=~s/^$perlvar{'lonDocRoot'}//; - $file=~s:^/*res::; - if ( !( $file =~ m:^/:) ) { - $location = $dir. '/'.$file; + if ($file=~m:^/~:) { # is a contruction space reference + $location = $file; + $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:; } else { - $location = '/home/httpd/html/res'.$file; + $file=~s/^$perlvar{'lonDocRoot'}//; + $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 dir/.. return $location; } +sub hreflocation { + my ($dir,$file)=@_; + unless (($_=~/^http:\/\//i) || ($_=~/^\//)) { + my $finalpath=filelocation($dir,$file); + $finalpath=~s/^\/home\/httpd\/html//; + return $finalpath; + } else { + return $file; + } +} + # ------------------------------------------------------------- Declutters URLs sub declutter { @@ -1218,6 +1774,7 @@ if ($readit ne 'done') { } } +%metacache=(); $readit='done'; &logthis('INFO: Read configuration');