--- loncom/lonnet/perl/lonnet.pm 2000/01/21 19:08:12 1.10
+++ loncom/lonnet/perl/lonnet.pm 2000/10/30 16:32:06 1.54
@@ -1,17 +1,84 @@
# The LearningOnline Network
# TCP networking package
+#
+# Functions for use by content handlers:
+#
+# plaintext(short) : plain text explanation of short term
+# 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,
+# assignrole(udom,uname,url,role,end,start) : 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")
+# assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
+# custom role to a user for the level given by url.
+# Specify name and domain of role author, and role name
+# 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
+# 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
+# varval(name) : value of a variable
+# refreshstate() : refresh the state information string
+# 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
+#
# 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
# 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
# 11/8,11/16,11/18,11/22,11/23,12/22,
-# 01/06,01/13 Gerd Kortemeyer
+# 01/06,01/13,02/24,02/28,02/29,
+# 03/01,03/02,03/06,03/07,03/13,
+# 04/05,05/29,05/31,06/01,
+# 06/05,06/26 Gerd Kortemeyer
+# 06/26 Ben Tyszka
+# 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
+# 08/14 Ben Tyszka
+# 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
+# 10/04 Gerd Kortemeyer
+# 10/04 Guy Albertelli
+# 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
+# 10/30 Gerd Kortemeyer
package Apache::lonnet;
use strict;
use Apache::File;
use LWP::UserAgent();
-use vars qw(%perlvar %hostname %homecache %spareid %hostdom %libserv $readit);
+use HTTP::Headers;
+use vars
+qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit);
use IO::Socket;
+use GDBM_File;
use Apache::Constants qw(:common :http);
# --------------------------------------------------------------------- Logging
@@ -55,6 +122,11 @@ sub reply {
my ($cmd,$server)=@_;
my $answer=subreply($cmd,$server);
if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
+ if (($answer=~/^error:/) || ($answer=~/^refused/) ||
+ ($answer=~/^rejected/)) {
+ &logthis("<font color=blue>WARNING:".
+ " $cmd to $server returned $answer</font>");
+ }
return $answer;
}
@@ -75,16 +147,20 @@ sub reconlonc {
&logthis("$peerfile still not there, give it another try");
sleep 5;
if (-e "$peerfile") { return; }
- &logthis("$peerfile still not there, giving up");
+ &logthis(
+ "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
} else {
- &logthis("lonc at pid $loncpid not responding, giving up");
+ &logthis(
+ "<font color=blue>WARNING:".
+ " lonc at pid $loncpid not responding, giving up</font>");
}
} else {
- &logthis('lonc not running, giving up');
+ &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
}
}
# ------------------------------------------------------ Critical communication
+
sub critical {
my ($cmd,$server)=@_;
my $answer=reply($cmd,$server);
@@ -117,11 +193,13 @@ sub critical {
}
chomp($wcmd);
if ($wcmd eq $cmd) {
- &logthis("Connection buffer $dfilename: $cmd");
+ &logthis("<font color=blue>WARNING: ".
+ "Connection buffer $dfilename: $cmd</font>");
&logperm("D:$server:$cmd");
return 'con_delayed';
} else {
- &logthis("CRITICAL CONNECTION FAILED: $server $cmd");
+ &logthis("<font color=red>CRITICAL:"
+ ." Critical connection failed: $server $cmd</font>");
&logperm("F:$server:$cmd");
return 'con_failed';
}
@@ -134,6 +212,15 @@ sub critical {
sub appenv {
my %newenv=@_;
+ map {
+ if (($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 $fh;
@@ -146,7 +233,9 @@ sub appenv {
chomp($oldenv[$i]);
if ($oldenv[$i] ne '') {
my ($name,$value)=split(/=/,$oldenv[$i]);
- $newenv{$name}=$value;
+ unless (defined($newenv{$name})) {
+ $newenv{$name}=$value;
+ }
}
}
{
@@ -163,6 +252,7 @@ sub appenv {
}
# ------------------------------ Find server with least workload from spare.tab
+
sub spareserver {
my $tryserver;
my $spareserver='';
@@ -178,9 +268,10 @@ sub spareserver {
}
# --------- Try to authenticate user from domain's lib servers (first this one)
+
sub authenticate {
my ($uname,$upass,$udom)=@_;
-
+ $upass=escape($upass);
if (($perlvar{'lonRole'} eq 'library') &&
($udom eq $perlvar{'lonDefDomain'})) {
my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
@@ -217,6 +308,7 @@ sub authenticate {
}
# ---------------------- Find the homebase for a user from domain's lib servers
+
sub homeserver {
my ($uname,$udom)=@_;
@@ -237,6 +329,7 @@ sub homeserver {
}
# ----------------------------- Subscribe to a resource, return URL if possible
+
sub subscribe {
my $fname=shift;
my $author=$fname;
@@ -254,7 +347,9 @@ sub subscribe {
sub repcopy {
my $filename=shift;
+ $filename=~s/\/+/\//g;
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: $filename");
@@ -262,9 +357,11 @@ sub repcopy {
} elsif ($remoteurl eq 'not_found') {
&logthis("Subscribe returned not_found: $filename");
return HTTP_NOT_FOUND;
- } elsif ($remoteurl eq 'forbidden') {
- &logthis("Subscribe returned forbidden: $filename");
+ } elsif ($remoteurl eq 'rejected') {
+ &logthis("Subscribe returned rejected: $filename");
return FORBIDDEN;
+ } elsif ($remoteurl eq 'directory') {
+ return OK;
} else {
my @parts=split(/\//,$filename);
my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
@@ -285,28 +382,1035 @@ sub repcopy {
if ($response->is_error()) {
unlink($transname);
my $message=$response->status_line;
- &logthis("LWP GET: $message: $filename");
+ &logthis("<font color=blue>WARNING:"
+ ." LWP get: $message: $filename</font>");
return HTTP_SERVICE_UNAVAILABLE;
} else {
+ if ($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,$filename);
return OK;
}
}
}
+# --------------------------------------------------------- Server Side Include
+
+sub ssi {
+
+ my ($fn,%form)=@_;
+
+ my $ua=new LWP::UserAgent;
+
+ my $request;
+
+ if (%form) {
+ $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
+ $request->content(join '&', map { "$_=$form{$_}" } 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 $response->content;
+}
+
+# ------------------------------------------------------------------------- Log
+
+sub log {
+ my ($dom,$nam,$hom,$what)=@_;
+ return critical("log:$dom:$nam:$what",$hom);
+}
+
# ----------------------------------------------------------------------- Store
sub store {
- my %storehash=shift;
- my $command="store:$ENV{'user.domain'}:$ENV{'user.name'}:"
- ."$ENV{'user.class'}:$ENV{'request.filename'}:";
+ 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 critical(
+ "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
+ "$ENV{'user.home'}");
}
# --------------------------------------------------------------------- Restore
sub restore {
- my $command="restore:$ENV{'user.domain'}:$ENV{'user.name'}:"
- ."$ENV{'user.class'}:$ENV{'request.filename'}:";
+ 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;
+ &appenv(%envhash);
+ return %returnhash;
+ }
+ }
+ return ();
+}
+
+# -------------------------------------------------------- Get user priviledges
+
+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 %thesepriv=();
+ my $now=time;
+ my $userroles="user.login.time=$now\n";
+ my $thesestr;
+
+ if ($rolesdump ne '') {
+ map {
+ if ($_!~/^rolesdef\&/) {
+ my ($area,$role)=split(/=/,$_);
+ $area=~s/\_\w\w$//;
+ my ($trole,$tend,$tstart)=split(/_/,$role);
+ $userroles.='user.role.'.$trole.'.'.$area.'='.
+ $tstart.'.'.$tend."\n";
+ if ($tend!=0) {
+ if ($tend<$now) {
+ $trole='';
+ }
+ }
+ if ($tstart!=0) {
+ if ($tstart>$now) {
+ $trole='';
+ }
+ }
+ if (($area ne '') && ($trole ne '')) {
+ my $spec=$trole.'.'.$area;
+ my ($tdummy,$tdomain,$trest)=split(/\//,$area);
+ if ($trole =~ /^cr\//) {
+ my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
+ my $homsvr=homeserver($rauthor,$rdomain);
+ if ($hostname{$homsvr} ne '') {
+ my $roledef=
+ reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
+ $homsvr);
+ if (($roledef ne 'con_lost') && ($roledef ne '')) {
+ my ($syspriv,$dompriv,$coursepriv)=
+ split(/\_/,unescape($roledef));
+ $allroles{'cm./'}.=':'.$syspriv;
+ $allroles{$spec.'./'}.=':'.$syspriv;
+ if ($tdomain ne '') {
+ $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
+ $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
+ if ($trest ne '') {
+ $allroles{'cm.'.$area}.=':'.$coursepriv;
+ $allroles{$spec.'.'.$area}.=':'.$coursepriv;
+ }
+ }
+ }
+ }
+ } else {
+ $allroles{'cm./'}.=':'.$pr{$trole.':s'};
+ $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
+ if ($tdomain ne '') {
+ $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
+ $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
+ if ($trest ne '') {
+ $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
+ $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
+ }
+ }
+ }
+ }
+ }
+ } split(/&/,$rolesdump);
+ map {
+ %thesepriv=();
+ map {
+ if ($_ ne '') {
+ my ($priviledge,$restrictions)=split(/&/,$_);
+ if ($restrictions eq '') {
+ $thesepriv{$priviledge}='F';
+ } else {
+ if ($thesepriv{$priviledge} ne 'F') {
+ $thesepriv{$priviledge}.=$restrictions;
+ }
+ }
+ }
+ } split(/:/,$allroles{$_});
+ $thesestr='';
+ map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
+ $userroles.='user.priv.'.$_.'='.$thesestr."\n";
+ } keys %allroles;
+ }
+ return $userroles;
+}
+
+# --------------------------------------------------------------- get interface
+
+sub get {
+ my ($namespace,@storearr)=@_;
+ my $items='';
+ map {
+ $items.=escape($_).'&';
+ } @storearr;
+ $items=~s/\&$//;
+ my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
+ $ENV{'user.home'});
+ my @pairs=split(/\&/,$rep);
+ my %returnhash=();
+ my $i=0;
+ map {
+ $returnhash{$_}=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 {
+ my $namespace=shift;
+ my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
+ $ENV{'user.home'});
+ my @pairs=split(/\&/,$rep);
+ my %returnhash=();
+ map {
+ my ($key,$value)=split(/=/,$_);
+ $returnhash{unescape($key)}=unescape($value);
+ } @pairs;
+ return %returnhash;
+}
+
+# --------------------------------------------------------------- put interface
+
+sub put {
+ my ($namespace,%storehash)=@_;
+ my $items='';
+ map {
+ $items.=escape($_).'='.escape($storehash{$_}).'&';
+ } keys %storehash;
+ $items=~s/\&$//;
+ return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
+ $ENV{'user.home'});
+}
+
+# ------------------------------------------------------ critical put interface
+
+sub cput {
+ my ($namespace,%storehash)=@_;
+ my $items='';
+ map {
+ $items.=escape($_).'='.escape($storehash{$_}).'&';
+ } keys %storehash;
+ $items=~s/\&$//;
+ return critical
+ ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
+ $ENV{'user.home'});
+}
+
+# -------------------------------------------------------------- eget interface
+
+sub eget {
+ my ($namespace,@storearr)=@_;
+ my $items='';
+ map {
+ $items.=escape($_).'&';
+ } @storearr;
+ $items=~s/\&$//;
+ my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
+ $ENV{'user.home'});
+ my @pairs=split(/\&/,$rep);
+ my %returnhash=();
+ my $i=0;
+ map {
+ $returnhash{$_}=unescape($pairs[$i]);
+ $i++;
+ } @storearr;
+ return %returnhash;
+}
+
+# ------------------------------------------------- Check for a user priviledge
+
+sub allowed {
+ my ($priv,$uri)=@_;
+ $uri=&declutter($uri);
+
+# Free bre access to adm and meta resources
+
+ if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
+ return 'F';
+ }
+
+ my $thisallowed='';
+ 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.=$1;
+ }
+
+# Course: uri itself is a course
+
+ if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$uri}
+ =~/$priv\&([^\:]*)/) {
+ $thisallowed.=$1;
+ }
+
+# Full access at system, domain or course-wide level? Exit.
+
+ if ($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 $refuri=&declutter($ENV{'HTTP_REFERER'});
+ my @uriparts=split(/\//,$refuri);
+ my $filename=$uriparts[$#uriparts];
+ my $pathname=$refuri;
+ $pathname=~s/\/$filename$//;
+ my @filenameparts=split(/\./,$filename);
+ 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.'.$uri.'.lock.expire'}>time) {
+ &log('Locked by res: '.$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('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('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('Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
+ return '';
+
+ }
+ }
+ }
+
+# Restricted by state?
+
+ if ($thisallowed=~/X/) {
+ if (&condval($statecond)) {
+ return '2';
+ } else {
+ return '';
+ }
+ }
+
+ return 'F';
+}
+
+# ---------------------------------------------------------- Refresh State Info
+
+sub refreshstate {
+}
+
+# ----------------------------------------------------------------- Define Role
+
+sub definerole {
+ if (allowed('mcr','/')) {
+ my ($rolename,$sysrole,$domrole,$courole)=@_;
+ map {
+ my ($crole,$cqual)=split(/\&/,$_);
+ if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
+ if ($pr{'cr:s'}=~/$crole\&/) {
+ if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
+ return "refused:s:$crole&$cqual";
+ }
+ }
+ } split('/',$sysrole);
+ map {
+ my ($crole,$cqual)=split(/\&/,$_);
+ if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
+ if ($pr{'cr:d'}=~/$crole\&/) {
+ if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
+ return "refused:d:$crole&$cqual";
+ }
+ }
+ } split('/',$domrole);
+ map {
+ my ($crole,$cqual)=split(/\&/,$_);
+ if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
+ if ($pr{'cr:c'}=~/$crole\&/) {
+ if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
+ return "refused:c:$crole&$cqual";
+ }
+ }
+ } split('/',$courole);
+ 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';
+ }
+}
+
+# ------------------------------------------------------------------ Plain Text
+
+sub plaintext {
+ my $short=shift;
+ 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'; }
+ $mrole='cr';
+ } else {
+ unless (($url=~/\.course$/) || ($url=~/\/$/)) { return 'invalid'; }
+ unless (allowed('c'+$role)) { 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';
+ }
+ }
+ return &reply($command,&homeserver($uname,$udom));
+}
+
+# ---------------------------------------------------------- Assign Custom Role
+
+sub assigncustomrole {
+ my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
+ return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
+ $end,$start);
+}
+
+# ----------------------------------------------------------------- Revoke Role
+
+sub revokerole {
+ my ($udom,$uname,$url,$role)=@_;
+ my $now=time;
+ return &assignrole($udom,$uname,$url,$role,$now);
+}
+
+# ---------------------------------------------------------- Revoke Custom Role
+
+sub revokecustomrole {
+ my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
+ my $now=time;
+ return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
+}
+
+# ------------------------------------------------------------ Directory lister
+
+sub dirlist {
+ my $uri=shift;
+ $uri=~s/^\///;
+ $uri=~s/\/$//;
+ my ($res,$udom,$uname,@rest)=split(/\//,$uri);
+ if ($udom) {
+ if ($uname) {
+ my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
+ homeserver($uname,$udom));
+ return split(/:/,$listing);
+ } else {
+ my $tryserver;
+ my %allusers=();
+ foreach $tryserver (keys %libserv) {
+ if ($hostdom{$tryserver} eq $udom) {
+ my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
+ $tryserver);
+ if (($listing ne 'no_such_dir') && ($listing ne 'empty')
+ && ($listing ne 'con_lost')) {
+ map {
+ my ($entry,@stat)=split(/&/,$_);
+ $allusers{$entry}=1;
+ } split(/:/,$listing);
+ }
+ }
+ }
+ my $alluserstr='';
+ map {
+ $alluserstr.=$_.'&user:';
+ } sort keys %allusers;
+ $alluserstr=~s/:$//;
+ return split(/:/,$alluserstr);
+ }
+ } else {
+ my $tryserver;
+ my %alldom=();
+ foreach $tryserver (keys %libserv) {
+ $alldom{$hostdom{$tryserver}}=1;
+ }
+ my $alldomstr='';
+ map {
+ $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
+ } sort keys %alldom;
+ $alldomstr=~s/:$//;
+ return split(/:/,$alldomstr);
+ }
+}
+
+# -------------------------------------------------------- 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 varval {
+ my $varname=shift;
+ my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
+ my $rest;
+ if ($therest[0]) {
+ $rest=join('.',@therest);
+ } else {
+ $rest='';
+ }
+ if ($realm eq 'user') {
+# --------------------------------------------------------------- user.resource
+ if ($space eq 'resource') {
+# ----------------------------------------------------------------- user.access
+ } elsif ($space eq 'access') {
+ return &allowed($qualifier,$rest);
+# ------------------------------------------ user.preferences, user.environment
+ } elsif (($space eq 'preferences') || ($space eq 'environment')) {
+ return $ENV{join('.',('environment',$qualifier,$rest))};
+# ----------------------------------------------------------------- user.course
+ } elsif ($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};
+ } elsif ($space eq 'filename') {
+ return $ENV{'request.filename'};
+ }
+ } elsif ($realm eq 'course') {
+# ---------------------------------------------------------- course.description
+ if ($space eq 'description') {
+ my %reply=&coursedescription($ENV{'request.course.id'});
+ return $reply{'description'};
+# ------------------------------------------------------------------- course.id
+ } elsif ($space eq 'id') {
+ return $ENV{'request.course.id'};
+# -------------------------------------------------- Any other course namespace
+ } else {
+ my ($cdom,$cnam)=split(/\_/,$ENV{'request.course.id'});
+ my $chome=&homeserver($cnam,$cdom);
+ my $item=join('.',($qualifier,$rest));
+ return &unescape
+ (&reply('get:'.$cdom.':'.$cnam.':'.&escape($space).':'.
+ &escape($item),$chome));
+ }
+ } elsif ($realm eq 'userdata') {
+ my $uhome=&homeserver($qualifier,$space);
+# ----------------------------------------------- userdata.domain.name.resource
+# ---------------------------------------------------- Any other user namespace
+ } elsif ($realm eq 'environment') {
+# ----------------------------------------------------------------- environment
+ return $ENV{join('.',($space,$qualifier,$rest))};
+ } 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/'.$thisfn};
+ if ($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
+ $file=~s/^$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 {
+ 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 $str;
}
# ================================================================ Main Program
@@ -349,11 +1453,45 @@ if ($readit ne 'done') {
}
}
}
-$readit='done';
-&logthis('Read configuration');
+# ------------------------------------------------------------ Read permissions
+{
+ my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
+
+ while (my $configline=<$config>) {
+ chomp($configline);
+ my ($role,$perm)=split(/ /,$configline);
+ if ($perm ne '') { $pr{$role}=$perm; }
+ }
}
+
+# -------------------------------------------- Read plain texts for permissions
+{
+ my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
+
+ while (my $configline=<$config>) {
+ chomp($configline);
+ my ($short,$plain)=split(/:/,$configline);
+ if ($plain ne '') { $prp{$short}=$plain; }
+ }
}
-1;
+# ------------------------------------------------------------- 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>');
+}
+}
+1;