--- loncom/lonnet/perl/lonnet.pm 2020/05/04 15:07:10 1.1172.2.123
+++ loncom/lonnet/perl/lonnet.pm 2020/09/28 13:56:29 1.1172.2.126
@@ -1,7 +1,7 @@
# The LearningOnline Network
# TCP networking package
#
-# $Id: lonnet.pm,v 1.1172.2.123 2020/05/04 15:07:10 raeburn Exp $
+# $Id: lonnet.pm,v 1.1172.2.126 2020/09/28 13:56:29 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -3069,6 +3069,27 @@ sub repcopy {
}
}
+# ------------------------------------------------- Unsubscribe from a resource
+
+sub unsubscribe {
+ my ($fname) = @_;
+ my $answer;
+ if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return $answer; }
+ $fname=~s/[\n\r]//g;
+ my $author=$fname;
+ $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
+ my ($udom,$uname)=split(/\//,$author);
+ my $home=homeserver($uname,$udom);
+ if ($home eq 'no_host') {
+ $answer = 'no_host';
+ } elsif (grep { $_ eq $home } ¤t_machine_ids()) {
+ $answer = 'home';
+ } else {
+ $answer = reply("unsub:$fname",$home);
+ }
+ return $answer;
+}
+
# ------------------------------------------------ Get server side include body
sub ssi_body {
my ($filelink,%form)=@_;
@@ -3227,12 +3248,18 @@ sub remove_stale_resfile {
$stale = 1;
}
if ($stale) {
- unlink($fname);
- if ($uri!~/\.meta$/) {
- unlink($fname.'.meta');
+ if (unlink($fname)) {
+ if ($uri!~/\.meta$/) {
+ if (-e $fname.'.meta') {
+ unlink($fname.'.meta');
+ }
+ }
+ my $unsubresult = &unsubscribe($fname);
+ unless ($unsubresult eq 'ok') {
+ &logthis("no unsub of $fname from $homeserver, reason: $unsubresult");
+ }
+ $removed = 1;
}
- &reply("unsub:$fname",$homeserver);
- $removed = 1;
}
}
}
@@ -7757,7 +7784,7 @@ sub customaccess {
# ------------------------------------------------- Check for a user privilege
sub allowed {
- my ($priv,$uri,$symb,$role,$clientip,$noblockcheck)=@_;
+ my ($priv,$uri,$symb,$role,$clientip,$noblockcheck,$ignorecache)=@_;
my $ver_orguri=$uri;
$uri=&deversion($uri);
my $orguri=$uri;
@@ -7982,7 +8009,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed.=$value;
} else {
- my @blockers = &has_comm_blocking($priv,$symb,$uri);
+ my @blockers = &has_comm_blocking($priv,$symb,$uri,$ignorecache);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8002,7 +8029,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed='F';
} else {
- my @blockers = &has_comm_blocking($priv,$symb,$refuri);
+ my @blockers = &has_comm_blocking($priv,$symb,$refuri,$ignorecache);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8075,7 +8102,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed.=$value;
} else {
- my @blockers = &has_comm_blocking($priv,$symb,$uri);
+ my @blockers = &has_comm_blocking($priv,$symb,$uri,$ignorecache);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8088,7 +8115,7 @@ sub allowed {
$checkreferer=0;
}
}
-
+
if ($checkreferer) {
my $refuri=$env{'httpref.'.$orguri};
unless ($refuri) {
@@ -8117,7 +8144,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed.=$value;
} else {
- my @blockers = &has_comm_blocking($priv,$symb,$refuri);
+ my @blockers = &has_comm_blocking($priv,'',$refuri,$ignorecache);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8203,7 +8230,7 @@ sub allowed {
}
}
}
-
+
#
# Rest of the restrictions depend on selected course
#
@@ -8361,6 +8388,10 @@ sub constructaccess {
#
# User for whom data are being temporarily cached.
my $cacheduser='';
+# Course for which data are being temporarily cached.
+my $cachedcid='';
+# List of blocks passed to &get_commblock_resources();
+my $cachedblocks='';
# Cached blockers for this user (a hash of blocking items).
my %cachedblockers=();
# When the data were last cached.
@@ -8370,13 +8401,22 @@ sub load_all_blockers {
my ($uname,$udom,$blocks)=@_;
if (($uname ne '') && ($udom ne '')) {
if (($cacheduser eq $uname.':'.$udom) &&
- (abs($cachedlast-time)<5)) {
+ ($cachedcid eq $env{'request.course.id'}) &&
+ (abs($cachedlast-time)<5) &&
+ (((ref($blocks) eq 'HASH') &&
+ ($cachedblocks eq join(',',sort(keys(%{$blocks}))))) ||
+ (!ref($blocks) && $cachedblocks eq ''))) {
return;
}
}
$cachedlast=time;
$cacheduser=$uname.':'.$udom;
+ $cachedcid=$env{'request.course.id'};
%cachedblockers = &get_commblock_resources($blocks);
+ if ((ref($blocks) eq 'HASH') && (keys(%{$blocks}) > 0)) {
+ $cachedblocks = join(',',sort(keys(%{$blocks})));
+ }
+ return;
}
sub get_comm_blocks {
@@ -8513,7 +8553,7 @@ sub get_commblock_resources {
}
sub has_comm_blocking {
- my ($priv,$symb,$uri,$blocks) = @_;
+ my ($priv,$symb,$uri,$nosymbcache,$blocked,$blocks) = @_;
my @blockers;
return unless ($env{'request.course.id'});
return unless ($priv eq 'bre');
@@ -8523,7 +8563,7 @@ sub has_comm_blocking {
return unless (keys(%cachedblockers) > 0);
my (%possibles,@symbs);
if (!$symb) {
- $symb = &symbread($uri,1,1,1,\%possibles);
+ $symb = &symbread($uri,1,1,'',\%possibles,$nosymbcache);
}
if ($symb) {
@symbs = ($symb);
@@ -8537,9 +8577,11 @@ sub has_comm_blocking {
foreach my $block (keys(%cachedblockers)) {
if ($block =~ /^firstaccess____(.+)$/) {
my $item = $1;
- if (($item eq $map) || ($item eq $symb)) {
- $noblock = 1;
- last;
+ unless ($blocked) {
+ if (($item eq $map) || ($item eq $symb)) {
+ $noblock = 1;
+ last;
+ }
}
}
if (ref($cachedblockers{$block}) eq 'HASH') {
@@ -8550,18 +8592,20 @@ sub has_comm_blocking {
}
}
}
- }
- if (ref($cachedblockers{$block}{'maps'}) eq 'HASH') {
- if ($cachedblockers{$block}{'maps'}{$map}) {
- unless (grep(/^\Q$block\E$/,@blockers)) {
- push(@blockers,$block);
+ if (ref($cachedblockers{$block}{'maps'}) eq 'HASH') {
+ if ($cachedblockers{$block}{'maps'}{$map}) {
+ unless (grep(/^\Q$block\E$/,@blockers)) {
+ push(@blockers,$block);
+ }
}
}
}
}
}
- return if ($noblock);
- return @blockers;
+ unless ($noblock) {
+ return @blockers;
+ }
+ return;
}
}
@@ -12400,19 +12444,26 @@ sub deversion {
# ------------------------------------------------------ Return symb list entry
sub symbread {
- my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles)=@_;
+ my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles,
+ $nocache)=@_;
my $cache_str='request.symbread.cached.'.$thisfn;
- if (defined($env{$cache_str})) {
- if ($ignorecachednull) {
- return $env{$cache_str} unless ($env{$cache_str} eq '');
- } else {
- return $env{$cache_str};
+ if (defined($env{$cache_str}) && !$nocache) {
+ unless (ref($possibles) eq 'HASH') {
+ if ($ignorecachednull) {
+ return $env{$cache_str} unless ($env{$cache_str} eq '');
+ } else {
+ return $env{$cache_str};
+ }
}
}
# no filename provided? try from environment
unless ($thisfn) {
if ($env{'request.symb'}) {
- return $env{$cache_str}=&symbclean($env{'request.symb'});
+ if ($nocache) {
+ return &symbclean($env{'request.symb'});
+ } else {
+ return $env{$cache_str}=&symbclean($env{'request.symb'});
+ }
}
$thisfn=$env{'request.filename'};
}
@@ -12420,7 +12471,11 @@ sub symbread {
# is that filename actually a symb? Verify, clean, and return
if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
if (&symbverify($thisfn,$1)) {
- return $env{$cache_str}=&symbclean($thisfn);
+ if ($nocache) {
+ return &symbclean($thisfn);
+ } else {
+ return $env{$cache_str}=&symbclean($thisfn);
+ }
}
}
$thisfn=declutter($thisfn);
@@ -12435,10 +12490,18 @@ sub symbread {
if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
$targetfn=$1;
}
- if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
- &GDBM_READER(),0640)) {
- $syval=$hash{$targetfn};
- untie(%hash);
+ unless ($nocache) {
+ if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+ &GDBM_READER(),0640)) {
+ $syval=$hash{$targetfn};
+ untie(%hash);
+ }
+ if ($syval) {
+ my @blockers = &has_comm_blocking('bre',$syval,$thisfn,$nocache);
+ if (@blockers) {
+ $syval='';
+ }
+ }
}
# ---------------------------------------------------------- There was an entry
if ($syval) {
@@ -12471,13 +12534,19 @@ sub symbread {
$syval=&encode_symb($bighash{'map_id_'.$mapid},
$resid,$thisfn);
if (ref($possibles) eq 'HASH') {
- $possibles->{$syval} = 1;
+ unless ($bighash{'randomout_'.$ids} || $env{'request.role.adv'}) {
+ $possibles->{$syval} = 1;
+ }
}
if ($checkforblock) {
- my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids});
- if (@blockers) {
- $syval = '';
- return;
+ unless ($bighash{'randomout_'.$ids} || $env{'request.role.adv'}) {
+ my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids});
+ if (@blockers) {
+ $syval = '';
+ untie(%bighash);
+ return '' if ($nocache);
+ return $env{$cache_str}='';
+ }
}
}
} elsif ((!$donotrecurse) || ($checkforblock) || (ref($possibles) eq 'HASH')) {
@@ -12496,12 +12565,13 @@ sub symbread {
if ($bighash{'map_type_'.$mapid} ne 'page') {
my $poss_syval=&encode_symb($bighash{'map_id_'.$mapid},
$resid,$thisfn);
- if (ref($possibles) eq 'HASH') {
- $possibles->{$syval} = 1;
- }
+ next if ($bighash{'randomout_'.$id} && !$env{'request.role.adv'});
+ next unless ($bighash{'encrypted_'.$id} eq $env{'request.enc'});
if ($checkforblock) {
my @blockers = &has_comm_blocking('bre',$poss_syval,$file);
- unless (@blockers > 0) {
+ if (@blockers > 0) {
+ $syval = '';
+ } else {
$syval = $poss_syval;
$realpossible++;
}
@@ -12509,6 +12579,11 @@ sub symbread {
$syval = $poss_syval;
$realpossible++;
}
+ if ($syval) {
+ if (ref($possibles) eq 'HASH') {
+ $possibles->{$syval} = 1;
+ }
+ }
}
}
}
@@ -12521,10 +12596,15 @@ sub symbread {
}
}
if ($syval) {
- return $env{$cache_str}=$syval;
+ if ($nocache) {
+ return $syval;
+ } else {
+ return $env{$cache_str}=$syval;
+ }
}
}
&appenv({'request.ambiguous' => $thisfn});
+ return '' if ($nocache);
return $env{$cache_str}='';
}