--- rat/lonuserstate.pm 2005/03/15 19:25:30 1.87
+++ rat/lonuserstate.pm 2005/09/23 21:39:09 1.96
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Construct and maintain state and binary representation of course for user
#
-# $Id: lonuserstate.pm,v 1.87 2005/03/15 19:25:30 albertel Exp $
+# $Id: lonuserstate.pm,v 1.96 2005/09/23 21:39:09 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -32,9 +32,8 @@ package Apache::lonuserstate;
# ------------------------------------------------- modules used by this module
use strict;
use Apache::Constants qw(:common :http);
-use Apache::File;
use HTML::TokeParser;
-use Apache::lonnet();
+use Apache::lonnet;
use Apache::loncommon();
use GDBM_File;
use Apache::lonmsg;
@@ -42,6 +41,7 @@ use Safe;
use Safe::Hole;
use Opcode;
use Apache::lonenc;
+use Fcntl qw(:flock);
# ---------------------------------------------------- Globals for this package
@@ -74,6 +74,7 @@ sub versiontrack {
sub putinversion {
my $uri=shift;
+ my $key=$env{'request.course.id'}.'_'.&Apache::lonnet::clutter($uri);
if ($hash{'version_'.$uri}) {
my $version=$hash{'version_'.$uri};
if ($version eq 'mostrecent') { return $uri; }
@@ -82,6 +83,7 @@ sub putinversion {
{ return $uri; }
$uri=~s/\.(\w+)$/\.$version\.$1/;
}
+ &Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600);
return $uri;
}
@@ -127,6 +129,7 @@ sub loadmap {
# Successfully got file, parse it
my $parser = HTML::TokeParser->new(\$instr);
+ $parser->attr_encoded(1);
my $token;
my $linkpc=0;
@@ -139,7 +142,7 @@ sub loadmap {
if ($token->[0] eq 'S') {
if ($token->[1] eq 'resource') {
# -------------------------------------------------------------------- Resource
-
+ if ($token->[2]->{'type'} eq 'zombie') { next; }
my $rid=$lpc.'.'.$token->[2]->{'id'};
$hash{'kind_'.$rid}='res';
@@ -339,7 +342,14 @@ sub traceroute {
my ($mapid,$resid)=split(/\./,$rid);
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid});
my $hidden=&Apache::lonnet::EXT('resource.0.hiddenresource',$symb);
- if ($hdnflag || lc($hidden) eq 'yes') { $hiddenurl{$rid}=1; }
+
+ if ($hdnflag || lc($hidden) eq 'yes') {
+ $hiddenurl{$rid}=1;
+ }
+ if (!$hdnflag && lc($hidden) eq 'no') {
+ delete($hiddenurl{$rid});
+ }
+
my $encrypt=&Apache::lonnet::EXT('resource.0.encrypturl',$symb);
if ($encflag || lc($encrypt) eq 'yes') { $encurl{$rid}=1; }
if (($retfurl eq '') && ($hash{'src_'.$rid})
@@ -540,15 +550,21 @@ sub readmap {
return 'No course data available.';
}
@cond=('true:normal');
- #unlink($fn.'.db');
- #unlink($fn.'_symb.db');
- unlink($fn.'.state');
- unlink($fn.'parms.db');
+
+ open(LOCKFILE,">$fn.db.lock");
+ my $lock=0;
+ if (flock(LOCKFILE,LOCK_EX|LOCK_NB)) {
+ $lock=1;
+ unlink($fn.'.db');
+ unlink($fn.'_symb.db');
+ unlink($fn.'.state');
+ unlink($fn.'parms.db');
+ }
undef %randompick;
undef %hiddenurl;
undef %encurl;
$retfurl='';
- if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
+ if ($lock && (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) &&
(tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) {
%hash=();
%parmhash=();
@@ -582,6 +598,7 @@ sub readmap {
}
# ----------------------------------------------- Close hashes to finally store
# --------------------------------- Routine must pass this point, no early outs
+ $hash{'first_url'}=$retfurl;
unless ((untie(%hash)) && (untie(%parmhash))) {
&Apache::lonnet::logthis("WARNING: ".
"Could not untie coursemap $fn for $uri.");
@@ -589,19 +606,25 @@ sub readmap {
# ---------------------------------------------------- Store away initial state
{
my $cfh;
- if ($cfh=Apache::File->new(">$fn.state")) {
+ if (open($cfh,">$fn.state")) {
print $cfh join("\n",@cond);
} else {
&Apache::lonnet::logthis("WARNING: ".
"Could not write statemap $fn for $uri.");
}
- }
+ }
+ flock(LOCKFILE,LOCK_UN);
+ close(LOCKFILE);
} else {
# if we are here it is likely because we are already trying to
# initialize the course in another child, busy wait trying to
# tie the hashes for the next 90 seconds, if we succeed forward
# them on to navmaps, if we fail, throw up the Could not init
# course screen
+ if ($lock) {
+ # Got the lock but not the DB files
+ flock(LOCKFILE,LOCK_UN);
+ }
untie(%hash);
untie(%parmhash);
&Apache::lonnet::logthis("WARNING: ".
@@ -610,7 +633,8 @@ sub readmap {
while($i<90) {
$i++;
sleep(1);
- if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640))) {
+ if (flock(LOCKFILE,LOCK_EX|LOCK_NB) &&
+ (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640))) {
if (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_READER(),0640)) {
$retfurl='/adm/navmaps';
&Apache::lonnet::appenv("request.course.id" => $short,
@@ -624,12 +648,14 @@ sub readmap {
untie(%hash);
untie(%parmhash);
}
+ flock(LOCKFILE,LOCK_UN);
+ close(LOCKFILE);
}
- &Apache::lonmsg::author_res_msg($ENV{'request.course.uri'},$errtext);
+ &Apache::lonmsg::author_res_msg($env{'request.course.uri'},$errtext);
# ------------------------------------------------- Check for critical messages
- my @what=&Apache::lonnet::dump('critical',$ENV{'user.domain'},
- $ENV{'user.name'});
+ my @what=&Apache::lonnet::dump('critical',$env{'user.domain'},
+ $env{'user.name'});
if ($what[0]) {
if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
$retfurl='/adm/email?critical=display';
@@ -641,7 +667,7 @@ sub readmap {
# ------------------------------------------------------- Evaluate state string
sub evalstate {
- my $fn=$ENV{'request.course.fn'}.'.state';
+ my $fn=$env{'request.course.fn'}.'.state';
my $state='';
if (-e $fn) {
my @conditions=();
@@ -673,7 +699,7 @@ sub evalstate {
}
}
}
- &Apache::lonnet::appenv('user.state.'.$ENV{'request.course.id'} => $state);
+ &Apache::lonnet::appenv('user.state.'.$env{'request.course.id'} => $state);
return $state;
}