version 1.25, 2000/08/28 22:21:24
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version 1.50, 2000/10/26 10:40:01
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# plaintext(short) : plain text explanation of short term |
# plaintext(short) : plain text explanation of short term |
# fileembstyle(ext) : embed style in page for file extension |
# fileembstyle(ext) : embed style in page for file extension |
# filedescription(ext) : descriptor text for file extension |
# filedescription(ext) : descriptor text for file extension |
# allowed(short,url) : returns codes for allowed actions F,R,S,C |
# allowed(short,url) : returns codes for allowed actions |
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# F: full access |
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# U,I,K: authentication modes (cxx only) |
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# '': forbidden |
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# 1: user needs to choose course |
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# 2: browse allowed |
# definerole(rolename,sys,dom,cou) : define a custom role rolename |
# definerole(rolename,sys,dom,cou) : define a custom role rolename |
# set priviledges in format of lonTabs/roles.tab for |
# set priviledges in format of lonTabs/roles.tab for |
# system, domain and course level, |
# system, domain and course level, |
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# revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role |
# revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role |
# appenv(hash) : adds hash to session environment |
# appenv(hash) : adds hash to session environment |
# store(hash) : stores hash permanently for this url |
# store(hash) : stores hash permanently for this url |
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# cstore(hash) : critical store |
# restore : returns hash for this url |
# restore : returns hash for this url |
# eget(namesp,array) : returns hash with keys from array filled in from namesp |
# 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 |
# get(namesp,array) : returns hash with keys from array filled in from namesp |
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# del(namesp,array) : deletes keys out of array from namesp |
# put(namesp,hash) : stores hash in namesp |
# put(namesp,hash) : stores hash in namesp |
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# cput(namesp,hash) : critical put |
# dump(namesp) : dumps the complete namespace into a hash |
# dump(namesp) : dumps the complete namespace into a hash |
# ssi(url,hash) : does a complete request cycle on url to localhost, posts |
# ssi(url,hash) : does a complete request cycle on url to localhost, posts |
# hash |
# hash |
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# coursedescription(id) : returns and caches course description for id |
# repcopy(filename) : replicate file |
# repcopy(filename) : replicate file |
# dirlist(url) : gets a directory listing |
# dirlist(url) : gets a directory listing |
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# directcondval(index) : reading condition value of single condition from |
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# state string |
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# condval(index) : value of condition index based on state |
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# varval(name) : value of a variable |
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# refreshstate() : refresh the state information string |
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# symblist(map,hash) : Updates symbolic storage links |
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# symbread([filename]) : returns the data handle (filename optional) |
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# rndseed() : returns a random seed |
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# getfile(filename) : returns the contents of filename, or a -1 if it can't |
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# be found, replicates and subscribes to the file |
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# filelocation(dir,file) : returns a farily clean absolute reference to file |
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# from the directory dir |
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# hreflocation(dir,file) : same as filelocation, but for hrefs |
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# 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, |
# 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, |
# 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19, |
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# 06/26 Ben Tyszka |
# 06/26 Ben Tyszka |
# 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer |
# 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer |
# 08/14 Ben Tyszka |
# 08/14 Ben Tyszka |
# 08/22,08/28 Gerd Kortemeyer |
# 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer |
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# 10/04 Gerd Kortemeyer |
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# 10/04 Guy Albertelli |
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# 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26 Gerd Kortemeyer |
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package Apache::lonnet; |
package Apache::lonnet; |
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Line 51 use HTTP::Headers;
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Line 77 use HTTP::Headers;
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use vars |
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 $readit); |
use IO::Socket; |
use IO::Socket; |
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use GDBM_File; |
use Apache::Constants qw(:common :http); |
use Apache::Constants qw(:common :http); |
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# --------------------------------------------------------------------- Logging |
# --------------------------------------------------------------------- Logging |
Line 184 sub critical {
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Line 211 sub critical {
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sub appenv { |
sub appenv { |
my %newenv=@_; |
my %newenv=@_; |
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map { |
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if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) { |
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&logthis("<font color=blue>WARNING: ". |
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"Attempt to modify environment ".$_." to ".$newenv{$_}); |
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delete($newenv{$_}); |
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} else { |
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$ENV{$_}=$newenv{$_}; |
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} |
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} keys %newenv; |
my @oldenv; |
my @oldenv; |
{ |
{ |
my $fh; |
my $fh; |
Line 391 sub ssi {
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Line 427 sub ssi {
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sub log { |
sub log { |
my ($dom,$nam,$hom,$what)=@_; |
my ($dom,$nam,$hom,$what)=@_; |
return reply("log:$dom:$nam:$what",$hom); |
return critical("log:$dom:$nam:$what",$hom); |
} |
} |
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# ----------------------------------------------------------------------- Store |
# ----------------------------------------------------------------------- Store |
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sub store { |
sub store { |
my %storehash=shift; |
my %storehash=@_; |
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my $symb; |
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unless ($symb=escape(&symbread())) { return ''; } |
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my $namespace; |
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unless ($namespace=$ENV{'request.course.id'}) { return ''; } |
my $namevalue=''; |
my $namevalue=''; |
map { |
map { |
$namevalue.=escape($_).'='.escape($storehash{$_}).'&'; |
$namevalue.=escape($_).'='.escape($storehash{$_}).'&'; |
} keys %storehash; |
} keys %storehash; |
$namevalue=~s/\&$//; |
$namevalue=~s/\&$//; |
return reply("store:$ENV{'user.domain'}:$ENV{'user.name'}:" |
return reply( |
."$ENV{'user.class'}:$ENV{'request.filename'}:$namevalue", |
"store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue", |
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"$ENV{'user.home'}"); |
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} |
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# -------------------------------------------------------------- Critical Store |
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sub cstore { |
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my %storehash=@_; |
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my $symb; |
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unless ($symb=escape(&symbread())) { return ''; } |
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my $namespace; |
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unless ($namespace=$ENV{'request.course.id'}) { return ''; } |
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my $namevalue=''; |
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map { |
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$namevalue.=escape($_).'='.escape($storehash{$_}).'&'; |
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} keys %storehash; |
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$namevalue=~s/\&$//; |
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return critical( |
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"store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue", |
"$ENV{'user.home'}"); |
"$ENV{'user.home'}"); |
} |
} |
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# --------------------------------------------------------------------- Restore |
# --------------------------------------------------------------------- Restore |
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sub restore { |
sub restore { |
my $answer=reply("restore:$ENV{'user.domain'}:$ENV{'user.name'}:" |
my $symb; |
."$ENV{'user.class'}:$ENV{'request.filename'}", |
unless ($symb=escape(&symbread())) { return ''; } |
"$ENV{'user.home'}"); |
my $namespace; |
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unless ($namespace=$ENV{'request.course.id'}) { return ''; } |
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my $answer=reply( |
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"restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb", |
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"$ENV{'user.home'}"); |
my %returnhash=(); |
my %returnhash=(); |
map { |
map { |
my ($name,$value)=split(/\=/,$_); |
my ($name,$value)=split(/\=/,$_); |
$returnhash{&unescape($name)}=&unescape($value); |
$returnhash{&unescape($name)}=&unescape($value); |
} split(/\&/,$answer); |
} split(/\&/,$answer); |
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map { |
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$returnhash{$_}=$returnhash{$returnhash{'version'}.':'.$_}; |
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} split(/\:/,$returnhash{$returnhash{'version'}.':keys'}); |
return %returnhash; |
return %returnhash; |
} |
} |
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# ---------------------------------------------------------- Course Description |
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sub coursedescription { |
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my $courseid=shift; |
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$courseid=~s/^\///; |
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$courseid=~s/\_/\//g; |
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my ($cdomain,$cnum)=split(/\//,$courseid); |
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my $chome=homeserver($cnum,$cdomain); |
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if ($chome ne 'no_host') { |
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my $rep=reply("dump:$cdomain:$cnum:environment",$chome); |
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if ($rep ne 'con_lost') { |
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my %cachehash=(); |
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my %returnhash=('home' => $chome, |
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'domain' => $cdomain, |
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'num' => $cnum); |
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map { |
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my ($name,$value)=split(/\=/,$_); |
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$name=&unescape($name); |
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$value=&unescape($value); |
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$returnhash{$name}=$value; |
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if ($name eq 'description') { |
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$cachehash{$courseid}=$value; |
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} |
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} split(/\&/,$rep); |
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$returnhash{'url'}='/res/'.declutter($returnhash{'url'}); |
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$returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'. |
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$ENV{'user.name'}.'_'.$cdomain.'_'.$cnum; |
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put ('coursedescriptions',%cachehash); |
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return %returnhash; |
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} |
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} |
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return (); |
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} |
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# -------------------------------------------------------- Get user priviledges |
# -------------------------------------------------------- Get user priviledges |
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sub rolesinit { |
sub rolesinit { |
Line 453 sub rolesinit {
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Line 552 sub rolesinit {
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} |
} |
} |
} |
if (($area ne '') && ($trole ne '')) { |
if (($area ne '') && ($trole ne '')) { |
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my $spec=$trole.'.'.$area; |
my ($tdummy,$tdomain,$trest)=split(/\//,$area); |
my ($tdummy,$tdomain,$trest)=split(/\//,$area); |
if ($trole =~ /^cr\//) { |
if ($trole =~ /^cr\//) { |
my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole); |
my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole); |
Line 464 sub rolesinit {
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Line 564 sub rolesinit {
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if (($roledef ne 'con_lost') && ($roledef ne '')) { |
if (($roledef ne 'con_lost') && ($roledef ne '')) { |
my ($syspriv,$dompriv,$coursepriv)= |
my ($syspriv,$dompriv,$coursepriv)= |
split(/\_/,unescape($roledef)); |
split(/\_/,unescape($roledef)); |
$allroles{'/'}.=':'.$syspriv; |
$allroles{'cm./'}.=':'.$syspriv; |
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$allroles{$spec.'./'}.=':'.$syspriv; |
if ($tdomain ne '') { |
if ($tdomain ne '') { |
$allroles{'/'.$tdomain.'/'}.=':'.$dompriv; |
$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv; |
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$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv; |
if ($trest ne '') { |
if ($trest ne '') { |
$allroles{$area}.=':'.$coursepriv; |
$allroles{'cm.'.$area}.=':'.$coursepriv; |
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$allroles{$spec.'.'.$area}.=':'.$coursepriv; |
} |
} |
} |
} |
} |
} |
} |
} |
} else { |
} else { |
$allroles{'/'}.=':'.$pr{$trole.':s'}; |
$allroles{'cm./'}.=':'.$pr{$trole.':s'}; |
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$allroles{$spec.'./'}.=':'.$pr{$trole.':s'}; |
if ($tdomain ne '') { |
if ($tdomain ne '') { |
$allroles{'/'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; |
$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; |
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$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'}; |
if ($trest ne '') { |
if ($trest ne '') { |
$allroles{$area}.=':'.$pr{$trole.':c'}; |
$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'}; |
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$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'}; |
} |
} |
} |
} |
} |
} |
Line 520 sub get {
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Line 626 sub get {
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$ENV{'user.home'}); |
$ENV{'user.home'}); |
my @pairs=split(/\&/,$rep); |
my @pairs=split(/\&/,$rep); |
my %returnhash=(); |
my %returnhash=(); |
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my $i=0; |
map { |
map { |
my ($key,$value)=split(/=/,$_); |
$returnhash{$_}=unescape($pairs[$i]); |
$returnhash{unespace($key)}=unescape($value); |
$i++; |
} @pairs; |
} @storearr; |
return %returnhash; |
return %returnhash; |
} |
} |
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# --------------------------------------------------------------- del interface |
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sub del { |
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my ($namespace,@storearr)=@_; |
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my $items=''; |
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map { |
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$items.=escape($_).'&'; |
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} @storearr; |
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$items=~s/\&$//; |
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return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items", |
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$ENV{'user.home'}); |
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} |
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# -------------------------------------------------------------- dump interface |
# -------------------------------------------------------------- dump interface |
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sub dump { |
sub dump { |
Line 537 sub dump {
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Line 657 sub dump {
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my %returnhash=(); |
my %returnhash=(); |
map { |
map { |
my ($key,$value)=split(/=/,$_); |
my ($key,$value)=split(/=/,$_); |
$returnhash{unespace($key)}=unescape($value); |
$returnhash{unescape($key)}=unescape($value); |
} @pairs; |
} @pairs; |
return %returnhash; |
return %returnhash; |
} |
} |
Line 555 sub put {
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Line 675 sub put {
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$ENV{'user.home'}); |
$ENV{'user.home'}); |
} |
} |
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# ------------------------------------------------------ critical put interface |
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sub cput { |
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my ($namespace,%storehash)=@_; |
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my $items=''; |
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map { |
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$items.=escape($_).'='.escape($storehash{$_}).'&'; |
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} keys %storehash; |
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$items=~s/\&$//; |
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return critical |
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("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items", |
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$ENV{'user.home'}); |
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} |
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# -------------------------------------------------------------- eget interface |
# -------------------------------------------------------------- eget interface |
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sub eget { |
sub eget { |
Line 568 sub eget {
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Line 702 sub eget {
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$ENV{'user.home'}); |
$ENV{'user.home'}); |
my @pairs=split(/\&/,$rep); |
my @pairs=split(/\&/,$rep); |
my %returnhash=(); |
my %returnhash=(); |
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my $i=0; |
map { |
map { |
my ($key,$value)=split(/=/,$_); |
$returnhash{$_}=unescape($pairs[$i]); |
$returnhash{unespace($key)}=unescape($value); |
$i++; |
} @pairs; |
} @storearr; |
return %returnhash; |
return %returnhash; |
} |
} |
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Line 581 sub allowed {
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Line 716 sub allowed {
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my ($priv,$uri)=@_; |
my ($priv,$uri)=@_; |
$uri=~s/^\/res//; |
$uri=~s/^\/res//; |
$uri=~s/^\///; |
$uri=~s/^\///; |
if ($uri=~/^adm\//) { |
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# Free bre access to adm resources |
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if (($uri=~/^adm\//) && ($priv eq 'bre')) { |
return 'F'; |
return 'F'; |
} |
} |
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# Gather priviledges over system and domain |
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my $thisallowed=''; |
my $thisallowed=''; |
if ($ENV{'user.priv./'}=~/$priv\&([^\:]*)/) { |
if ($ENV{'user.priv./'}=~/$priv\&([^\:]*)/) { |
$thisallowed.=$1; |
$thisallowed.=$1; |
Line 591 sub allowed {
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Line 732 sub allowed {
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if ($ENV{'user.priv./'.(split(/\//,$uri))[0].'/'}=~/$priv\&([^\:]*)/) { |
if ($ENV{'user.priv./'.(split(/\//,$uri))[0].'/'}=~/$priv\&([^\:]*)/) { |
$thisallowed.=$1; |
$thisallowed.=$1; |
} |
} |
if ($ENV{'user.priv./'.$uri}=~/$priv\&([^\:]*)/) { |
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$thisallowed.=$1; |
# Full access at system or domain level? Exit. |
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if ($thisallowed=~/F/) { |
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return 'F'; |
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} |
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# The user does not have full access at system or domain level |
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# Course level access control |
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# uri itself refering to a course? |
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if ($uri=~/\.course$/) { |
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if ($ENV{'user.priv./'.$uri}=~/$priv\&([^\:]*)/) { |
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$thisallowed.=$1; |
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} |
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# Full access on course level? Exit. |
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if ($thisallowed=~/F/) { |
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return 'F'; |
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} |
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# uri is refering to an individual resource; user needs to be in a course |
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} else { |
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unless(defined($ENV{'request.course.id'})) { |
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return '1'; |
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} |
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# Get access priviledges for course |
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if ($ENV{'user.priv./'.$ENV{'request.course.id'}}=~/$priv\&([^\:]*)/) { |
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$thisallowed.=$1; |
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} |
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# See if resource or referer is part of this course |
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my @uriparts=split(/\//,$uri); |
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my $urifile=$uriparts[$#uriparts]; |
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$urifile=~/\.(\w+)$/; |
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my $uritype=$1; |
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$#uriparts--; |
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my $uripath=join('/',@uriparts); |
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my $uricond=-1; |
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if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$uripath}=~ |
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/\&$urifile\:(\d+)\&/) { |
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$uricond=$1; |
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} elsif (($fe{$uritype} eq 'emb') || ($fe{$uritype} eq 'img')) { |
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my $refuri=$ENV{'HTTP_REFERER'}; |
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$refuri=~s/^\/res//; |
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$refuri=~s/^\///; |
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@uriparts=split(/\//,$refuri); |
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$urifile=$uriparts[$#uriparts]; |
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$#uriparts--; |
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$uripath=join('/',@uriparts); |
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if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$uripath}=~ |
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/\&$urifile\:(\d+)\&/) { |
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$uricond=$1; |
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} |
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} |
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if ($uricond>=0) { |
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# The resource is part of the course |
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# If user had full access on course level, go ahead |
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if ($thisallowed=~/F/) { |
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return 'F'; |
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} |
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# Restricted by state? |
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if ($thisallowed=~/X/) { |
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if (&condval($uricond)) { |
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return '2'; |
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} else { |
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return ''; |
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} |
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} |
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} |
} |
} |
return $thisallowed; |
return $thisallowed; |
} |
} |
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# ---------------------------------------------------------- Refresh State Info |
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sub refreshstate { |
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} |
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# ----------------------------------------------------------------- Define Role |
# ----------------------------------------------------------------- Define Role |
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sub definerole { |
sub definerole { |
Line 665 sub filedecription {
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Line 889 sub filedecription {
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sub assignrole { |
sub assignrole { |
my ($udom,$uname,$url,$role,$end,$start)=@_; |
my ($udom,$uname,$url,$role,$end,$start)=@_; |
my $mrole; |
my $mrole; |
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$url=declutter($url); |
if ($role =~ /^cr\//) { |
if ($role =~ /^cr\//) { |
unless ($url=~/\.course$/) { return 'invalid'; } |
unless ($url=~/\.course$/) { return 'invalid'; } |
unless (allowed('ccr',$url)) { return 'refused'; } |
unless (allowed('ccr',$url)) { return 'refused'; } |
Line 761 sub dirlist {
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Line 986 sub dirlist {
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} |
} |
} |
} |
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# -------------------------------------------------------- Value of a Condition |
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sub directcondval { |
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my $number=shift; |
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if ($ENV{'user.state.'.$ENV{'request.course.id'}}) { |
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return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1); |
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} else { |
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return 2; |
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} |
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} |
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sub condval { |
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my $condidx=shift; |
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my $result=0; |
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if ($ENV{'request.course.id'}) { |
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if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$condidx})) { |
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my $operand='|'; |
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my @stack; |
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map { |
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if ($_ eq '(') { |
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push @stack,($operand,$result) |
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} elsif ($_ eq ')') { |
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my $before=pop @stack; |
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if (pop @stack eq '&') { |
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$result=$result>$before?$before:$result; |
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} else { |
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$result=$result>$before?$result:$before; |
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} |
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} elsif (($_ eq '&') || ($_ eq '|')) { |
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$operand=$_; |
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} else { |
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my $new=directcondval($_); |
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if ($operand eq '&') { |
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$result=$result>$new?$new:$result; |
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} else { |
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$result=$result>$new?$result:$new; |
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} |
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} |
|
} ($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$condidx}=~ |
|
/(\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 |
# -------------------------------------------------------- Escape Special Chars |
|
|
sub escape { |
sub escape { |