--- loncom/lonnet/perl/lonnet.pm 2000/08/22 15:27:35 1.24
+++ loncom/lonnet/perl/lonnet.pm 2000/11/25 19:56:04 1.70
@@ -4,7 +4,14 @@
# Functions for use by content handlers:
#
# plaintext(short) : plain text explanation of short term
-# allowed(short,url) : returns codes for allowed actions F,R,S,C
+# fileembstyle(ext) : embed style in page for file extension
+# filedescription(ext) : descriptor text for file extension
+# allowed(short,url) : 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
# definerole(rolename,sys,dom,cou) : define a custom role rolename
# set priviledges in format of lonTabs/roles.tab for
# system, domain and course level,
@@ -17,16 +24,43 @@
# 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 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
+# 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
#
# 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,
@@ -38,7 +72,11 @@
# 06/26 Ben Tyszka
# 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
# 08/14 Ben Tyszka
-# 08/22 Gerd Kortemeyer
+# 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
+# 10/04 Gerd Kortemeyer
+# 10/04 Guy Albertelli
+# 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
+# 10/30,10/31,11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25 Gerd Kortemeyer
package Apache::lonnet;
@@ -47,8 +85,9 @@ use Apache::File;
use LWP::UserAgent();
use HTTP::Headers;
use vars
-qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp $readit);
+qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit);
use IO::Socket;
+use GDBM_File;
use Apache::Constants qw(:common :http);
# --------------------------------------------------------------------- Logging
@@ -92,8 +131,7 @@ sub reply {
my ($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("<font color=blue>WARNING:".
" $cmd to $server returned $answer</font>");
}
@@ -182,6 +220,15 @@ sub critical {
sub appenv {
my %newenv=@_;
+ map {
+ if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
+ &logthis("<font color=blue>WARNING: ".
+ "Attempt to modify environment ".$_." to ".$newenv{$_});
+ delete($newenv{$_});
+ } else {
+ $ENV{$_}=$newenv{$_};
+ }
+ } keys %newenv;
my @oldenv;
{
my $fh;
@@ -211,6 +258,35 @@ sub appenv {
}
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 $fh;
+ unless ($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 $_; }
+ } @oldenv;
+ }
+ return 'ok';
+}
# ------------------------------ Find server with least workload from spare.tab
@@ -289,6 +365,111 @@ sub homeserver {
return 'no_host';
}
+# ------------------------------------- Find the usernames behind a list of IDs
+
+sub idget {
+ my ($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 {
@@ -301,6 +482,9 @@ sub subscribe {
return 'not_found';
}
my $answer=reply("sub:$fname",$home);
+ if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
+ $answer.=' by '.$home;
+ }
return $answer;
}
@@ -312,14 +496,14 @@ 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;
@@ -389,37 +573,104 @@ sub ssi {
sub log {
my ($dom,$nam,$hom,$what)=@_;
- return reply("log:$dom:$nam:$what",$hom);
+ return critical("log:$dom:$nam:$what",$hom);
}
# ----------------------------------------------------------------------- Store
sub store {
- my %storehash=shift;
+ 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 reply(
+ "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
+ "$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 reply("store:$ENV{'user.domain'}:$ENV{'user.name'}:"
- ."$ENV{'user.class'}:$ENV{'request.filename'}:$namevalue",
+ return critical(
+ "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
"$ENV{'user.home'}");
}
# --------------------------------------------------------------------- Restore
sub restore {
- my $answer=reply("restore:$ENV{'user.domain'}:$ENV{'user.name'}:"
- ."$ENV{'user.class'}:$ENV{'request.filename'}",
- "$ENV{'user.home'}");
+ my $symb;
+ unless ($symb=escape(&symbread())) { return ''; }
+ my $namespace;
+ unless ($namespace=$ENV{'request.course.id'}) { return ''; }
+ my $answer=reply(
+ "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
+ "$ENV{'user.home'}");
my %returnhash=();
map {
my ($name,$value)=split(/\=/,$_);
$returnhash{&unescape($name)}=&unescape($value);
} split(/\&/,$answer);
+ map {
+ $returnhash{$_}=$returnhash{$returnhash{'version'}.':'.$_};
+ } split(/\:/,$returnhash{$returnhash{'version'}.':keys'});
return %returnhash;
}
+# ---------------------------------------------------------- Course Description
+
+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 $normalid=$courseid;
+ $normalid=~s/\//\_/g;
+ my %envhash=();
+ my %returnhash=('home' => $chome,
+ 'domain' => $cdomain,
+ 'num' => $cnum);
+ map {
+ my ($name,$value)=split(/\=/,$_);
+ $name=&unescape($name);
+ $value=&unescape($value);
+ $returnhash{$name}=$value;
+ $envhash{'course.'.$normalid.'.'.$name}=$value;
+ } split(/\&/,$rep);
+ $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
+ $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
+ $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
+ $envhash{'course.'.$normalid.'.last_cache'}=time;
+ $envhash{'course.'.$normalid.'.home'}=$chome;
+ $envhash{'course.'.$normalid.'.domain'}=$cdomain;
+ $envhash{'course.'.$normalid.'.num'}=$cnum;
+ &appenv(%envhash);
+ return %returnhash;
+ }
+ }
+ return ();
+}
+
# -------------------------------------------------------- Get user priviledges
sub rolesinit {
@@ -451,6 +702,7 @@ sub rolesinit {
}
}
if (($area ne '') && ($trole ne '')) {
+ my $spec=$trole.'.'.$area;
my ($tdummy,$tdomain,$trest)=split(/\//,$area);
if ($trole =~ /^cr\//) {
my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
@@ -462,21 +714,27 @@ sub rolesinit {
if (($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'};
}
}
}
@@ -518,13 +776,27 @@ sub get {
$ENV{'user.home'});
my @pairs=split(/\&/,$rep);
my %returnhash=();
+ my $i=0;
map {
- my ($key,$value)=split(/=/,$_);
- $returnhash{unespace($key)}=unescape($value);
- } @pairs;
+ $returnhash{$_}=unescape($pairs[$i]);
+ $i++;
+ } @storearr;
return %returnhash;
}
+# --------------------------------------------------------------- del interface
+
+sub del {
+ my ($namespace,@storearr)=@_;
+ my $items='';
+ map {
+ $items.=escape($_).'&';
+ } @storearr;
+ $items=~s/\&$//;
+ return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
+ $ENV{'user.home'});
+}
+
# -------------------------------------------------------------- dump interface
sub dump {
@@ -535,7 +807,7 @@ sub dump {
my %returnhash=();
map {
my ($key,$value)=split(/=/,$_);
- $returnhash{unespace($key)}=unescape($value);
+ $returnhash{unescape($key)}=unescape($value);
} @pairs;
return %returnhash;
}
@@ -553,6 +825,20 @@ 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 {
@@ -566,10 +852,11 @@ sub eget {
$ENV{'user.home'});
my @pairs=split(/\&/,$rep);
my %returnhash=();
+ my $i=0;
map {
- my ($key,$value)=split(/=/,$_);
- $returnhash{unespace($key)}=unescape($value);
- } @pairs;
+ $returnhash{$_}=unescape($pairs[$i]);
+ $i++;
+ } @storearr;
return %returnhash;
}
@@ -577,22 +864,227 @@ sub eget {
sub allowed {
my ($priv,$uri)=@_;
- $uri=~s/^\/res//;
- $uri=~s/^\///;
- if ($uri=~/^adm\//) {
+ $uri=&declutter($uri);
+
+# Free bre access to adm and meta resources
+
+ if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
return 'F';
}
+
my $thisallowed='';
- if ($ENV{'user.priv./'}=~/$priv\&([^\:]*)/) {
+ my $statecond=0;
+ my $courseprivid='';
+
+# Course
+
+ if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
$thisallowed.=$1;
}
- if ($ENV{'user.priv./'.(split(/\//,$uri))[0].'/'}=~/$priv\&([^\:]*)/) {
+
+# Domain
+
+ if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
+ =~/$priv\&([^\:]*)/) {
$thisallowed.=$1;
}
- if ($ENV{'user.priv./'.$uri}=~/$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;
}
- return $thisallowed;
+
+# Full access at system, domain or course-wide level? Exit.
+
+ if ($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:'=~/\:$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'};
+ }
+ $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;
+ $checkreferer=0;
+ }
+ }
+
+ if (($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;
+ }
+ }
+ }
+ }
+ }
+
+#
+# Gathered now: all priviledges 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;
+ 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.'.$priv.'.lock.expire'});
+ return '';
+ }
+ }
+ }
+ }
+ }
+
+#
+# Rest of the restrictions depend on selected course
+#
+
+ unless ($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];
+ 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=<$fh>;
+ }
+ if (join('',@content)=~
+ /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
+ &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
+ 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
+ return '';
+
+ }
+ }
+ }
+
+# Restricted by state?
+
+ if ($thisallowed=~/X/) {
+ if (&condval($statecond)) {
+ return '2';
+ } else {
+ return '';
+ }
+ }
+
+ return 'F';
}
# ----------------------------------------------------------------- Define Role
@@ -644,11 +1136,26 @@ sub plaintext {
return $prp{$short};
}
+# ------------------------------------------------------------------ Plain Text
+
+sub fileembstyle {
+ my $ending=shift;
+ return $fe{$ending};
+}
+
+# ------------------------------------------------------------ Description Text
+
+sub filedecription {
+ my $ending=shift;
+ return $fd{$ending};
+}
+
# ----------------------------------------------------------------- Assign Role
sub assignrole {
my ($udom,$uname,$url,$role,$end,$start)=@_;
my $mrole;
+ $url=declutter($url);
if ($role =~ /^cr\//) {
unless ($url=~/\.course$/) { return 'invalid'; }
unless (allowed('ccr',$url)) { return 'refused'; }
@@ -745,6 +1252,404 @@ 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 ($ENV{'request.course.id'}) {
+ if ($allpathcond) {
+ my $operand='|';
+ my @stack;
+ map {
+ if ($_ 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:$new;
+ }
+ }
+ } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
+ }
+ }
+ return $result;
+}
+
+# --------------------------------------------------------- Value of a Variable
+
+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 ($realm eq 'user') {
+# --------------------------------------------------------------- user.resource
+ if ($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') {
+# ---------------------------------------------------------- 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 $uri=&declutter($ENV{'request.filename'});
+ my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
+ if (-e $filename) {
+ my @content;
+ {
+ my $fh=Apache::File->new($filename);
+ @content=<$fh>;
+ }
+ if (join('',@content)=~
+ /\<$space[^\>]*\>([^\<]*)\<\/$space\>/) {
+ return $1;
+ }
+ }
+# ---------------------------------------------------- Any other user namespace
+ } elsif ($realm eq 'environment') {
+# ----------------------------------------------------------------- environment
+ return $ENV{$spacequalifierrest};
+ } elsif ($realm eq 'system') {
+# ----------------------------------------------------------------- system.time
+ if ($space eq 'time') {
+ return time;
+ }
+ }
+ return '';
+}
+
+# ------------------------------------------------- Update symbolic store links
+
+sub symblist {
+ my ($mapname,%newhash)=@_;
+ $mapname=declutter($mapname);
+ my %hash;
+ if (($ENV{'request.course.fn'}) && (%newhash)) {
+ if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
+ &GDBM_WRCREAT,0640)) {
+ map {
+ $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
+ } keys %newhash;
+ if (untie(%hash)) {
+ return 'ok';
+ }
+ }
+ }
+ return 'error';
+}
+
+# ------------------------------------------------------ Return symb list entry
+
+sub symbread {
+ my $thisfn=shift;
+ unless ($thisfn) {
+ $thisfn=$ENV{'request.filename'};
+ }
+ $thisfn=declutter($thisfn);
+ my %hash;
+ my %bighash;
+ my $syval='';
+ if (($ENV{'request.course.fn'}) && ($thisfn)) {
+ if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
+ &GDBM_READER,0640)) {
+ $syval=$hash{$thisfn};
+ untie(%hash);
+ }
+# ---------------------------------------------------------- There was an entry
+ if ($syval) {
+ unless ($syval=~/\_\d+$/) {
+ unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
+ &appenv('request.ambiguous' => $thisfn);
+ return '';
+ }
+ $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_/res/'.$thisfn};
+ unless ($ids) {
+ $ids=$bighash{'ids_/'.$thisfn};
+ }
+ if ($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;
+ } else {
+# ------------------------------------------ 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) { $syval=''; }
+ }
+ }
+ untie(%bighash)
+ }
+ }
+ if ($syval) {
+ return $syval.'___'.$thisfn;
+ }
+ }
+ &appenv('request.ambiguous' => $thisfn);
+ return '';
+}
+
+# ---------------------------------------------------------- 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/;
+ $txt=~s/\D//g;
+ return int($txt);
+}
+
+sub rndseed {
+ my $symb;
+ unless ($symb=&symbread()) { return time; }
+ my $symbchck=unpack("%32C*",$symb);
+ my $symbseed=numval($symb)%$symbchck;
+ my $namechck=unpack("%32C*",$ENV{'user.name'});
+ my $nameseed=numval($ENV{'user.name'})%$namechck;
+ return int( $symbseed
+ .$nameseed
+ .unpack("%32C*",$ENV{'user.domain'})
+ .unpack("%32C*",$ENV{'request.course.id'})
+ .$namechck
+ .$symbchck);
+}
+
+# ------------------------------------------------------------ Serves up a file
+# returns either the contents of the file or a -1
+sub getfile {
+ my $file=shift;
+ &repcopy($file);
+ if (! -e $file ) { return -1; };
+ my $fh=Apache::File->new($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:;
+ } else {
+ $file=~s/^$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/..
+ 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 {
+ my $thisfn=shift;
+ $thisfn=~s/^$perlvar{'lonDocRoot'}//;
+ $thisfn=~s/^\///;
+ $thisfn=~s/^res\///;
+ return $thisfn;
+}
+
# -------------------------------------------------------- Escape Special Chars
sub escape {
@@ -823,6 +1728,20 @@ if ($readit ne 'done') {
}
}
+# ------------------------------------------------------------- Read file types
+{
+ my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
+
+ while (my $configline=<$config>) {
+ chomp($configline);
+ my ($ending,$emb,@descr)=split(/\s+/,$configline);
+ if ($descr[0] ne '') {
+ $fe{$ending}=$emb;
+ $fd{$ending}=join(' ',@descr);
+ }
+ }
+}
+
$readit='done';
&logthis('<font color=yellow>INFO: Read configuration</font>');