--- loncom/lonnet/perl/lonnet.pm 2004/09/09 08:26:46 1.540
+++ loncom/lonnet/perl/lonnet.pm 2004/09/24 12:45:16 1.547
@@ -1,7 +1,7 @@
# The LearningOnline Network
# TCP networking package
#
-# $Id: lonnet.pm,v 1.540 2004/09/09 08:26:46 albertel Exp $
+# $Id: lonnet.pm,v 1.547 2004/09/24 12:45:16 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -821,15 +821,17 @@ sub getsection {
}
-my $disk_caching_disabled=1;
+my $disk_caching_disabled=0;
sub devalidate_cache {
my ($cache,$id,$name) = @_;
delete $$cache{$id.'.time'};
+ delete $$cache{$id.'.file'};
delete $$cache{$id};
- if ($disk_caching_disabled) { return; }
+ if (1 || $disk_caching_disabled) { return; }
my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
- open(DB,"$filename.lock");
+ if (!-e $filename) { return; }
+ open(DB,">$filename.lock");
flock(DB,LOCK_EX);
my %hash;
if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
@@ -856,16 +858,32 @@ sub is_cached {
my ($cache,$id,$name,$time) = @_;
if (!$time) { $time=300; }
if (!exists($$cache{$id.'.time'})) {
- &load_cache_item($cache,$name,$id);
+ &load_cache_item($cache,$name,$id,$time);
}
if (!exists($$cache{$id.'.time'})) {
# &logthis("Didn't find $id");
return (undef,undef);
} else {
if (time-($$cache{$id.'.time'})>$time) {
-# &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
- &devalidate_cache($cache,$id,$name);
- return (undef,undef);
+ if (exists($$cache{$id.'.file'})) {
+ foreach my $filename (@{ $$cache{$id.'.file'} }) {
+ my $mtime=(stat($filename))[9];
+ #+1 is to take care of edge effects
+ if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
+# &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
+# "$id because of $filename");
+ } else {
+ &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
+ &devalidate_cache($cache,$id,$name);
+ return (undef,undef);
+ }
+ }
+ $$cache{$id.'.time'}=time;
+ } else {
+# &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
+ &devalidate_cache($cache,$id,$name);
+ return (undef,undef);
+ }
}
}
return ($$cache{$id},1);
@@ -881,44 +899,69 @@ sub do_cache {
$$cache{$id};
}
+my %do_save_item;
+my %do_save;
sub save_cache_item {
my ($cache,$name,$id)=@_;
if ($disk_caching_disabled) { return; }
- my $starttime=&Time::HiRes::time();
-# &logthis("Saving :$name:$id");
- my %hash;
- my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
- open(DB,"$filename.lock");
- flock(DB,LOCK_EX);
- if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
- eval <<'EVALBLOCK';
- $hash{$id.'.time'}=$$cache{$id.'.time'};
- $hash{$id}=freeze({'item'=>$$cache{$id}});
+ $do_save{$name}=$cache;
+ if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
+ $do_save_item{$name}->{$id}=1;
+ return;
+}
+
+sub save_cache {
+ if ($disk_caching_disabled) { return; }
+ my ($cache,$name,$id);
+ foreach $name (keys(%do_save)) {
+ $cache=$do_save{$name};
+
+ my $starttime=&Time::HiRes::time();
+ &logthis("Saving :$name:");
+ my %hash;
+ my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
+ open(DB,">$filename.lock");
+ flock(DB,LOCK_EX);
+ if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
+ foreach $id (keys(%{ $do_save_item{$name} })) {
+ eval <<'EVALBLOCK';
+ $hash{$id.'.time'}=$$cache{$id.'.time'};
+ $hash{$id}=freeze({'item'=>$$cache{$id}});
+ if (exists($$cache{$id.'.file'})) {
+ $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
+ }
EVALBLOCK
- if ($@) {
- &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
- unlink($filename);
- }
- } else {
- if (-e $filename) {
- &logthis("Unable to tie hash (save cache item): $name ($!)");
- unlink($filename);
+ if ($@) {
+ &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
+ unlink($filename);
+ last;
+ }
+ }
+ } else {
+ if (-e $filename) {
+ &logthis("Unable to tie hash (save cache): $name ($!)");
+ unlink($filename);
+ }
}
+ untie(%hash);
+ flock(DB,LOCK_UN);
+ close(DB);
+ &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
}
- untie(%hash);
- flock(DB,LOCK_UN);
- close(DB);
-# &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
+ undef(%do_save);
+ undef(%do_save_item);
+
}
sub load_cache_item {
- my ($cache,$name,$id)=@_;
+ my ($cache,$name,$id,$time)=@_;
if ($disk_caching_disabled) { return; }
my $starttime=&Time::HiRes::time();
# &logthis("Before Loading $name for $id size is ".scalar(%$cache));
my %hash;
my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
- open(DB,"$filename.lock");
+ if (!-e $filename) { return; }
+ open(DB,">$filename.lock");
flock(DB,LOCK_SH);
if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
eval <<'EVALBLOCK';
@@ -935,9 +978,17 @@ sub load_cache_item {
}
# &logthis("Initial load: $count");
} else {
- my $hashref=thaw($hash{$id});
- $$cache{$id}=$hashref->{'item'};
- $$cache{$id.'.time'}=$hash{$id.'.time'};
+ if (($$cache{$id.'.time'}+$time) < time) {
+ $$cache{$id.'.time'}=$hash{$id.'.time'};
+ {
+ my $hashref=thaw($hash{$id});
+ $$cache{$id}=$hashref->{'item'};
+ }
+ if (exists($hash{$id.'.file'})) {
+ my $hashref=thaw($hash{$id.'.file'});
+ $$cache{$id.'.file'}=$hashref->{'item'};
+ }
+ }
}
EVALBLOCK
if ($@) {
@@ -2723,7 +2774,9 @@ sub allowed {
$uri=&deversion($uri);
my $orguri=$uri;
$uri=&declutter($uri);
-
+
+
+
if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
# Free bre access to adm and meta resources
if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
@@ -2731,6 +2784,13 @@ sub allowed {
return 'F';
}
+# Free bre access to user's own portfolio contents
+ my ($space,$domain,$name,$dir)=split('/',$uri);
+ if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
+ ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
+ return 'F';
+ }
+
# Free bre to public access
if ($priv eq 'bre') {
@@ -3132,8 +3192,10 @@ sub log_query {
sub fetch_enrollment_query {
my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
my $homeserver;
+ my $maxtries = 1;
if ($context eq 'automated') {
$homeserver = $perlvar{'lonHostID'};
+ $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
} else {
$homeserver = &homeserver($cnum,$dom);
}
@@ -3151,8 +3213,13 @@ sub fetch_enrollment_query {
return 'error: '.$queryid;
}
my $reply = &get_query_reply($queryid);
+ my $tries = 1;
+ while (($reply=~/^timeout/) && ($tries < $maxtries)) {
+ $reply = &get_query_reply($queryid);
+ $tries ++;
+ }
if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
- &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum);
+ &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
} else {
my @responses = split/:/,$reply;
if ($homeserver eq $perlvar{'lonHostID'}) {
@@ -4237,7 +4304,9 @@ sub metadata {
unless ($filename=~/\.meta$/) { $filename.='.meta'; }
my $metastring;
if ($uri !~ m|^uploaded/|) {
- $metastring=&getfile(&filelocation('',&clutter($filename)));
+ my $file=&filelocation('',&clutter($filename));
+ push(@{$metacache{$uri.'.file'}},$file);
+ $metastring=&getfile($file);
}
my $parser=HTML::LCParser->new(\$metastring);
my $token;
@@ -4602,22 +4671,19 @@ sub deversion {
sub symbread {
my ($thisfn,$donotrecurse)=@_;
- if (defined($ENV{'request.symbread.cached'})) {
- return $ENV{'request.symbread.cached'};
- }
+ my $cache_str='request.symbread.cached.'.$thisfn;
+ if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
# no filename provided? try from environment
unless ($thisfn) {
if ($ENV{'request.symb'}) {
- $ENV{'request.symbread.cached'}=&symbclean($ENV{'request.symb'});
- return $ENV{'request.symbread.cached'};
+ return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
}
$thisfn=$ENV{'request.filename'};
}
# is that filename actually a symb? Verify, clean, and return
if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
if (&symbverify($thisfn,$1)) {
- $ENV{'request.symbread.cached'}=&symbclean($thisfn);
- return $ENV{'request.symbread.cached'};
+ return $ENV{$cache_str}=&symbclean($thisfn);
}
}
$thisfn=declutter($thisfn);
@@ -4639,8 +4705,7 @@ sub symbread {
unless ($syval=~/\_\d+$/) {
unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
&appenv('request.ambiguous' => $thisfn);
- $ENV{'request.symbread.cached'}='';
- return '';
+ return $ENV{$cache_str}='';
}
$syval.=$1;
}
@@ -4687,13 +4752,11 @@ sub symbread {
}
}
if ($syval) {
- $ENV{'request.symbread.cached'}=&symbclean($syval.'___'.$thisfn);
- return $ENV{'request.symbread.cached'};
+ return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
}
}
&appenv('request.ambiguous' => $thisfn);
- $ENV{'request.symbread.cached'}='';
- return '';
+ return $ENV{$cache_str}='';
}
# ---------------------------------------------------------- Return random seed