--- loncom/lonnet/perl/lonnet.pm 2000/08/22 15:27:35 1.24
+++ loncom/lonnet/perl/lonnet.pm 2000/09/26 20:07:24 1.32
@@ -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,
@@ -21,12 +28,18 @@
# 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
# put(namesp,hash) : stores hash in namesp
# dump(namesp) : dumps the complete namespace into a hash
# ssi(url,hash) : does a complete request cycle on url to localhost, posts
# hash
# repcopy(filename) : replicate file
# dirlist(url) : gets a directory listing
+# 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
+# rndseed() : returns a random seed
#
# 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 +51,7 @@
# 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 Gerd Kortemeyer
package Apache::lonnet;
@@ -47,8 +60,9 @@ 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
@@ -395,28 +409,45 @@ sub log {
# ----------------------------------------------------------------------- Store
sub store {
- my %storehash=shift;
+ my %storehash=@_;
+ my $symb;
+ unless ($symb=escape(&symbread())) { return ''; }
+ my $namespace;
+ unless ($namespace=$ENV{'request.course.uri'}) { return ''; }
+ $namespace=~s/\//\_\_/g;
+ $namespace=~s/\./\_/g;
+ $namespace=escape($namespace);
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'}:$namevalue",
+ return reply(
+ "store:$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.uri'}) { return ''; }
+ $namespace=~s/\//\_\_/g;
+ $namespace=~s/\./\_/g;
+ $namespace=escape($namespace);
+ 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{$returnhash{'version'}.':keys'});
return %returnhash;
}
@@ -520,11 +551,24 @@ sub get {
my %returnhash=();
map {
my ($key,$value)=split(/=/,$_);
- $returnhash{unespace($key)}=unescape($value);
+ $returnhash{unescape($key)}=unescape($value);
} @pairs;
return %returnhash;
}
+# --------------------------------------------------------------- del interface
+
+sub del {
+ my ($namespace,@storearr)=@_;
+ my $items='';
+ map {
+ $items.=escape($_).'&';
+ } @storearr;
+ $items=~s/\&$//;
+ return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
+ $ENV{'user.home'});
+}
+
# -------------------------------------------------------------- dump interface
sub dump {
@@ -535,7 +579,7 @@ sub dump {
my %returnhash=();
map {
my ($key,$value)=split(/=/,$_);
- $returnhash{unespace($key)}=unescape($value);
+ $returnhash{unescape($key)}=unescape($value);
} @pairs;
return %returnhash;
}
@@ -568,7 +612,7 @@ sub eget {
my %returnhash=();
map {
my ($key,$value)=split(/=/,$_);
- $returnhash{unespace($key)}=unescape($value);
+ $returnhash{unescape($key)}=unescape($value);
} @pairs;
return %returnhash;
}
@@ -579,9 +623,15 @@ sub allowed {
my ($priv,$uri)=@_;
$uri=~s/^\/res//;
$uri=~s/^\///;
- if ($uri=~/^adm\//) {
+
+# Free bre access to adm resources
+
+ if (($uri=~/^adm\//) && ($priv eq 'bre')) {
return 'F';
}
+
+# Gather priviledges over system and domain
+
my $thisallowed='';
if ($ENV{'user.priv./'}=~/$priv\&([^\:]*)/) {
$thisallowed.=$1;
@@ -589,12 +639,95 @@ sub allowed {
if ($ENV{'user.priv./'.(split(/\//,$uri))[0].'/'}=~/$priv\&([^\:]*)/) {
$thisallowed.=$1;
}
- if ($ENV{'user.priv./'.$uri}=~/$priv\&([^\:]*)/) {
- $thisallowed.=$1;
+
+# Full access at system or domain level? Exit.
+
+ if ($thisallowed=~/F/) {
+ return 'F';
+ }
+
+# The user does not have full access at system or domain level
+# Course level access control
+
+# uri itself refering to a course?
+
+ if ($uri=~/\.course$/) {
+ if ($ENV{'user.priv./'.$uri}=~/$priv\&([^\:]*)/) {
+ $thisallowed.=$1;
+ }
+# Full access on course level? Exit.
+ if ($thisallowed=~/F/) {
+ return 'F';
+ }
+
+# uri is refering to an individual resource; user needs to be in a course
+
+ } else {
+
+ unless(defined($ENV{'request.course.uri'})) {
+ return '1';
+ }
+
+# Get access priviledges for course
+
+ if ($ENV{'user.priv./'.$ENV{'request.course.uri'}}=~/$priv\&([^\:]*)/) {
+ $thisallowed.=$1;
+ }
+
+# See if resource or referer is part of this course
+
+ my @uriparts=split(/\//,$uri);
+ my $urifile=$uriparts[$#uriparts];
+ $urifile=~/\.(\w+)$/;
+ my $uritype=$1;
+ $#uriparts--;
+ my $uripath=join('/',@uriparts);
+ my $uricond=-1;
+ if ($ENV{'acc.res.'.$ENV{'request.course'}.'.'.$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.'.$ENV{'request.course'}.'.'.$uripath}=~
+ /\&$urifile\:(\d+)\&/) {
+ $uricond=$1;
+ }
+ }
+
+ if ($uricond>=0) {
+
+# The resource is part of the course
+# If user had full access on course level, go ahead
+
+ if ($thisallowed=~/F/) {
+ return 'F';
+ }
+
+# Restricted by state?
+
+ if ($thisallowed=~/X/) {
+ if (&condval($uricond)>1) {
+ return '2';
+ } else {
+ return '';
+ }
+ }
+ }
}
return $thisallowed;
}
+# ---------------------------------------------------------- Refresh State Info
+
+sub refreshstate {
+}
+
# ----------------------------------------------------------------- Define Role
sub definerole {
@@ -644,11 +777,26 @@ 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 +893,146 @@ sub dirlist {
}
}
+# -------------------------------------------------------- Value of a Condition
+
+sub condval {
+ my $condidx=shift;
+ my $result=0;
+ if ($ENV{'request.course'}) {
+ if (defined($ENV{'acc.cond.'.$ENV{'request.course'}.'.'.$condidx})) {
+ 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 $new=
+ substr($ENV{'user.state.'.$ENV{'request.course'}},$_,1);
+ if ($operand eq '&') {
+ $result=$result>$new?$new:$result;
+ } else {
+ $result=$result>$new?$result:$new;
+ }
+ }
+ } ($ENV{'acc.cond.'.$ENV{'request.course'}.'.'.$condidx}=~
+ /(\d+|\(|\)|\&|\|)/g);
+ }
+ }
+ return $result;
+}
+
+# --------------------------------------------------------- Value of a Variable
+
+sub varval {
+ my ($realm,$space,@components)=split(/\./,shift);
+ my $value='';
+ if ($realm eq 'user') {
+ if ($space=~/^resource/) {
+ $space=~s/^resource\[//;
+ $space=~s/\]$//;
+
+ } else {
+ }
+ } elsif ($realm eq 'course') {
+ } elsif ($realm eq 'session') {
+ } elsif ($realm eq 'system') {
+ }
+ return $value;
+}
+
+# ------------------------------------------------- Update symbolic store links
+
+sub symblist {
+ my ($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 %hash;
+ my $syval;
+ if (($ENV{'request.course.fn'}) && ($ENV{'request.filename'})) {
+ if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
+ &GDBM_READER,0640)) {
+ my $thisfn=declutter($ENV{'request.filename'});
+ $syval=$hash{$thisfn};
+ if (untie(%hash)) {
+ unless ($syval=~/\_\d+$/) {
+ unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
+ return '';
+ }
+ $syval.=$1;
+ }
+ $syval.='___'.$thisfn;
+ return $syval;
+ }
+ }
+ }
+ 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 ''; }
+ 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.uri'})
+ .$namechck
+ .$symbchck);
+}
+
+# ------------------------------------------------------------- Declutters URLs
+
+sub declutter {
+ my $thisfn=shift;
+ $thisfn=~s/^$perlvar{'lonDocRoot'}//;
+ $thisfn=~s/^\///;
+ $thisfn=~s/^res\///;
+ return $thisfn;
+}
+
# -------------------------------------------------------- Escape Special Chars
sub escape {
@@ -823,6 +1111,20 @@ if ($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>');