--- rat/lonuserstate.pm 2005/01/19 20:18:44 1.78.2.1 +++ rat/lonuserstate.pm 2006/02/23 18:17:37 1.105 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # Construct and maintain state and binary representation of course for user # -# $Id: lonuserstate.pm,v 1.78.2.1 2005/01/19 20:18:44 albertel Exp $ +# $Id: lonuserstate.pm,v 1.105 2006/02/23 18:17:37 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -31,10 +31,8 @@ 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 +40,7 @@ use Safe; use Safe::Hole; use Opcode; use Apache::lonenc; +use Fcntl qw(:flock); # ---------------------------------------------------- Globals for this package @@ -74,6 +73,7 @@ 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 +82,7 @@ sub putinversion { { return $uri; } $uri=~s/\.(\w+)$/\.$version\.$1/; } + &Apache::lonnet::do_cache_new('courseresversion',$key,&Apache::lonnet::declutter($uri),600); return $uri; } @@ -102,7 +103,7 @@ sub processversionfile { sub loadmap { my $uri=shift; - if ($hash{'map_pc_'.$uri}) { return OK; } + if ($hash{'map_pc_'.$uri}) { return; } $pc++; my $lpc=$pc; @@ -116,8 +117,8 @@ sub loadmap { unless (($fn=~/\.sequence$/) || ($fn=~/\.page$/)) { - $errtext.="Invalid map: $fn\n"; - return OK; + $errtext.="Invalid map: $fn\n"; + return; } my $instr=&Apache::lonnet::getfile($fn); @@ -127,6 +128,7 @@ sub loadmap { # Successfully got file, parse it my $parser = HTML::TokeParser->new(\$instr); + $parser->attr_encoded(1); my $token; my $linkpc=0; @@ -139,7 +141,7 @@ sub loadmap { if ($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'; @@ -150,17 +152,21 @@ sub loadmap { $hash{'version_'.$turi}=$1; } } - &Apache::lonnet::do_cache(\%Apache::lonnet::titlecache, - &Apache::lonnet::encode_symb($uri,$token->[2]->{'id'}, - $turi), - $token->[2]->{'title'},'title'); + my $title=$token->[2]->{'title'}; + $title=~s/\&colon\;/\:/gs; +# my $symb=&Apache::lonnet::encode_symb($uri, +# $token->[2]->{'id'}, +# $turi); +# &Apache::lonnet::do_cache_new('title',$symb,$title); unless ($ispage) { $turi=~/\.(\w+)$/; my $embstyle=&Apache::loncommon::fileembstyle($1); if ($token->[2]->{'external'} eq 'true') { # external $turi=~s/^http\:\/\//\/adm\/wrapper\/ext\//; } elsif ($turi=~/^\/*uploaded\//) { # uploaded - if (($embstyle eq 'img') || ($embstyle eq 'emb')) { + if (($embstyle eq 'img') + || ($embstyle eq 'emb') + || ($embstyle eq 'wrp')) { $turi='/adm/wrapper'.$turi; } elsif ($embstyle eq 'ssi') { #do nothing with these @@ -171,7 +177,9 @@ sub loadmap { my $mapdir=$uri; $mapdir=~s/[^\/]+$//; $turi=&Apache::lonnet::hreflocation($mapdir,$turi); - if (($embstyle eq 'img') || ($embstyle eq 'emb')) { + if (($embstyle eq 'img') + || ($embstyle eq 'emb') + || ($embstyle eq 'wrp')) { $turi='/adm/wrapper'.$turi; } } @@ -185,8 +193,7 @@ sub loadmap { $hash{'ids_'.$idsuri}=''.$rid; } - if - ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) { + if ($turi=~/\/(syllabus|aboutme|navmaps|smppg|bulletinboard)$/) { $turi.='?register=1'; } @@ -289,7 +296,7 @@ sub loadmap { } if ($token->[2]->{'name'}=~/^parameter_(0_)*encrypturl$/) { if ($token->[2]->{'value'}=~/^yes$/i) { - $hiddenurl{$referid}=1; + $encurl{$referid}=1; } } if ($token->[2]->{'name'}=~/^parameter_(0_)*hiddenresource$/) { @@ -298,92 +305,97 @@ sub loadmap { } } } - + } } } else { - $errtext.='Map not loaded: The file does not exist. '; + $errtext.='Map not loaded: The file ('.$fn.') does not exist. '; } } # --------------------------------------------------------- Simplify expression sub simplify { - my $expression=shift; + my $expression=shift; +# (0&1) = 1 + $expression=~s/\(0\&([_\.\d]+)\)/$1/g; # (8)=8 - $expression=~s/\((\d+)\)/$1/g; + $expression=~s/\(([_\.\d]+)\)/$1/g; # 8&8=8 - $expression=~s/(\D)(\d+)\&\2(\D)/$1$2$3/g; + $expression=~s/([^_\.\d])([_\.\d]+)\&\2([^_\.\d])/$1$2$3/g; # 8|8=8 - $expression=~s/(\D)(\d+)\|\2(\D)/$1$2$3/g; + $expression=~s/([^_\.\d])([_\.\d]+)\|\2([^_\.\d])/$1$2$3/g; # (5&3)&4=5&3&4 - $expression=~s/\((\d+)((?:\&\d+)+)\)\&(\d+\D)/$1$2\&$3/g; + $expression=~s/\(([_\.\d]+)((?:\&[_\.\d]+)+)\)\&([_\.\d]+[^_\.\d])/$1$2\&$3/g; # (((5&3)|(4&6)))=((5&3)|(4&6)) - $expression=~ - s/\((\(\(\d+(?:\&\d+)*\)(?:\|\(\d+(?:\&\d+)*\))+\))\)/$1/g; + $expression=~ + s/\((\(\([_\.\d]+(?:\&[_\.\d]+)*\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+\))\)/$1/g; # ((5&3)|(4&6))|(1&2)=(5&3)|(4&6)|(1&2) - $expression=~ - s/\((\(\d+(?:\&\d+)*\))((?:\|\(\d+(?:\&\d+)*\))+)\)\|(\(\d+(?:\&\d+)*\))/\($1$2\|$3\)/g; - return $expression; + $expression=~ + s/\((\([_\.\d]+(?:\&[_\.\d]+)*\))((?:\|\([_\.\d]+(?:\&[_\.\d]+)*\))+)\)\|(\([_\.\d]+(?:\&[_\.\d]+)*\))/\($1$2\|$3\)/g; + return $expression; } # -------------------------------------------------------- Build condition hash sub traceroute { my ($sofar,$rid,$beenhere,$encflag,$hdnflag)=@_; - $sofar=simplify($sofar); + my $newsofar=$sofar=simplify($sofar); unless ($beenhere=~/\&$rid\&/) { - $beenhere.=$rid.'&'; - if ($hdnflag) { - $hiddenurl{$rid}=1; - } - if ($encflag) { - $encurl{$rid}=1; - } - if (($retfurl eq '') && ($hash{'src_'.$rid}) - && ($hash{'src_'.$rid}!~/\.sequence$/)) { - my ($mapid,$resid)=split(/\./,$rid); - $retfurl=$hash{'src_'.$rid}. - (($hash{'src_'.$rid}=~/\?/)?'&':'?').'symb='. - &Apache::lonnet::symbclean( - &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). - '___'.$resid.'___'. - &Apache::lonnet::declutter($hash{'src_'.$rid})); - } - if (defined($hash{'conditions_'.$rid})) { - $hash{'conditions_'.$rid}=simplify( + $beenhere.=$rid.'&'; + 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 '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_'.$rid}) + && ($hash{'src_'.$rid}!~/\.sequence$/)) { + $retfurl=$hash{'src_'.$rid}.(($hash{'src_'.$rid}=~/\?/)?'&':'?'). + 'symb='.$symb; + } + if (defined($hash{'conditions_'.$rid})) { + $hash{'conditions_'.$rid}=simplify( '('.$hash{'conditions_'.$rid}.')|('.$sofar.')'); - } else { - $hash{'conditions_'.$rid}=$sofar; - } - if (defined($hash{'is_map_'.$rid})) { - if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) { - &traceroute($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},'&', - $encflag || $encurl{$rid}, - $hdnflag || $hiddenurl{$rid}); - if (defined($hash{'map_finish_'.$hash{'src_'.$rid}})) { - $sofar= - $hash{'conditions_'.$hash{'map_finish_'.$hash{'src_'.$rid}}}; - } - } - } - if (defined($hash{'to_'.$rid})) { - foreach (split(/\,/,$hash{'to_'.$rid})) { + } else { + $hash{'conditions_'.$rid}=$sofar; + } + $newsofar='_'.$rid; + if (defined($hash{'is_map_'.$rid})) { + if (defined($hash{'map_start_'.$hash{'src_'.$rid}})) { + $sofar=$newsofar= + &traceroute($sofar, + $hash{'map_start_'.$hash{'src_'.$rid}},'&', + $encflag || $encurl{$rid}, + $hdnflag || $hiddenurl{$rid}); + } + } + if (defined($hash{'to_'.$rid})) { + foreach (split(/\,/,$hash{'to_'.$rid})) { my $further=$sofar; if ($hash{'undercond_'.$_}) { - if (defined($hash{'condid_'.$hash{'undercond_'.$_}})) { - $further=simplify('('.$further.')&('. - $hash{'condid_'.$hash{'undercond_'.$_}}.')'); - } else { - $errtext.='Undefined condition ID: ' - .$hash{'undercond_'.$_}.'. '; - } + if (defined($hash{'condid_'.$hash{'undercond_'.$_}})) { + $further=simplify('('.'_'.$rid.')&('. + $hash{'condid_'.$hash{'undercond_'.$_}}.')'); + } else { + $errtext.='Undefined condition ID: ' + .$hash{'undercond_'.$_}.'. '; + } } - &traceroute($further,$hash{'goesto_'.$_},$beenhere,$encflag,$hdnflag); - } - } + $newsofar=&traceroute($further,$hash{'goesto_'.$_},$beenhere, + $encflag,$hdnflag); + } + } } + return $newsofar; } # ------------------------------ Cascading conditions, quick access, parameters @@ -394,84 +406,75 @@ sub accinit { my %captured=(); my $condcounter=0; $acchash{'acc.cond.'.$short.'.0'}=0; - foreach (keys %hash) { - if ($_=~/^conditions/) { - my $expr=$hash{$_}; - foreach ($expr=~m/(\(\(\d+(?:\&\d+)+\)(?:\|\(\d+(?:\&\d+)+\))+\))/g) { - my $sub=$_; - my $orig=$_; - $sub=~/\(\((\d+\&(:?\d+\&)*)(?:\d+\&*)+\)(?:\|\(\1(?:\d+\&*)+\))+\)/; - my $factor=$1; - $sub=~s/$factor//g; - $sub=~s/^\(/\($factor\(/; - $sub.=')'; - $sub=simplify($sub); - $orig=~s/(\W)/\\$1/g; - $expr=~s/$orig/$sub/; - } - $hash{$_}=$expr; - unless (defined($captured{$expr})) { - $condcounter++; - $captured{$expr}=$condcounter; - $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr; - } - } elsif ($_=~/^param_(\d+)\.(\d+)/) { - my $prefix=&Apache::lonnet::declutter($hash{'map_id_'.$1}). - '___'.$2.'___'.&Apache::lonnet::declutter($hash{'src_'.$1.'.'.$2}); - foreach (split(/\&/,$hash{$_})) { - my ($typename,$value)=split(/\=/,$_); - my ($type,$name)=split(/\:/,$typename); - $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name)}= - &Apache::lonnet::unescape($value); - $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name).'.type'}= - &Apache::lonnet::unescape($type); - } - } - } - foreach (keys %hash) { - if ($_=~/^ids/) { - foreach (split(/\,/,$hash{$_})) { - my $resid=$_; - my $uri=$hash{'src_'.$resid}; - $uri=~s/^\/adm\/wrapper//; - $uri=&Apache::lonnet::declutter($uri); - my @uriparts=split(/\//,$uri); - my $urifile=$uriparts[$#uriparts]; - $#uriparts--; - my $uripath=join('/',@uriparts); - if ($uripath) { - my $uricond='0'; - if (defined($hash{'conditions_'.$resid})) { - $uricond=$captured{$hash{'conditions_'.$resid}}; - } - if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) { - if ($acchash{'acc.res.'.$short.'.'.$uripath}=~ - /(\&\Q$urifile\E\:[^\&]*)/) { - my $replace=$1; - my $regexp=$replace; - #$regexp=~s/\|/\\\|/g; - $acchash{'acc.res.'.$short.'.'.$uripath} - =~s/\Q$regexp\E/$replace\|$uricond/; - } else { - $acchash{'acc.res.'.$short.'.'.$uripath}.= - $urifile.':'.$uricond.'&'; - } - } else { - $acchash{'acc.res.'.$short.'.'.$uripath}= - '&'.$urifile.':'.$uricond.'&'; - } - } - } - } + foreach my $key (keys(%hash)) { + if ($key=~/^conditions/) { + my $expr=$hash{$key}; + foreach my $sub ($expr=~m/(\(\([_\.\d]+(?:\&[_\.\d]+)+\)(?:\|\([_\.\d]+(?:\&[_\.\d]+)+\))+\))/g) { + my $orig=$sub; + $sub=~/\(\(([_\.\d]+\&(:?[_\.\d]+\&)*)(?:[_\.\d]+\&*)+\)(?:\|\(\1(?:[_\.\d]+\&*)+\))+\)/; + my $factor=$1; + $sub=~s/$factor//g; + $sub=~s/^\(/\($factor\(/; + $sub.=')'; + $sub=simplify($sub); + $orig=~s/(\W)/\\$1/g; + $expr=~s/$orig/$sub/; + } + $hash{$key}=$expr; + unless (defined($captured{$expr})) { + $condcounter++; + $captured{$expr}=$condcounter; + $acchash{'acc.cond.'.$short.'.'.$condcounter}=$expr; + } + } elsif ($key=~/^param_(\d+)\.(\d+)/) { + my $prefix=&Apache::lonnet::encode_symb($hash{'map_id_'.$1},$2, + $hash{'src_'.$1.'.'.$2}); + foreach my $param (split(/\&/,$hash{$key})) { + my ($typename,$value)=split(/\=/,$param); + my ($type,$name)=split(/\:/,$typename); + $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name)}= + &Apache::lonnet::unescape($value); + $parmhash{$prefix.'.'.&Apache::lonnet::unescape($name).'.type'}= + &Apache::lonnet::unescape($type); + } + } + } + foreach my $key (keys(%hash)) { + if ($key=~/^ids/) { + foreach my $resid (split(/\,/,$hash{$key})) { + my $uri=$hash{'src_'.$resid}; + my ($uripath,$urifile) = + &Apache::lonnet::split_uri_for_cond($uri); + if ($uripath) { + my $uricond='0'; + if (defined($hash{'conditions_'.$resid})) { + $uricond=$captured{$hash{'conditions_'.$resid}}; + } + if (defined($acchash{'acc.res.'.$short.'.'.$uripath})) { + if ($acchash{'acc.res.'.$short.'.'.$uripath}=~ + /(\&\Q$urifile\E\:[^\&]*)/) { + my $replace=$1; + my $regexp=$replace; + #$regexp=~s/\|/\\\|/g; + $acchash{'acc.res.'.$short.'.'.$uripath} =~ + s/\Q$regexp\E/$replace\|$uricond/; + } else { + $acchash{'acc.res.'.$short.'.'.$uripath}.= + $urifile.':'.$uricond.'&'; + } + } else { + $acchash{'acc.res.'.$short.'.'.$uripath}= + '&'.$urifile.':'.$uricond.'&'; + } + } + } + } } $acchash{'acc.res.'.$short.'.'}='&:0&'; my $courseuri=$uri; $courseuri=~s/^\/res\///; &Apache::lonnet::delenv('(acc\.|httpref\.)'); - &Apache::lonnet::appenv(%acchash, - "request.course.id" => $short, - "request.course.fn" => $fn, - "request.course.uri" => $courseuri); + &Apache::lonnet::appenv(%acchash); } # ---------------- Selectively delete from randompick maps and hidden url parms @@ -510,11 +513,10 @@ sub hiddenurls { $hash{'randomout_'.$currentrids[$k]}=1; my ($mapid,$resid)=split(/\./,$currentrids[$k]); $randomoutentry.='&'. - &Apache::lonnet::symbclean( - &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). - '___'.$resid.'___'. - &Apache::lonnet::declutter($hash{'src_'.$currentrids[$k]}) - ).'&'; + &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid}, + $resid, + $hash{'src_'.$currentrids[$k]} + ).'&'; } } } @@ -523,11 +525,8 @@ sub hiddenurls { $hash{'randomout_'.$rid}=1; my ($mapid,$resid)=split(/\./,$rid); $randomoutentry.='&'. - &Apache::lonnet::symbclean( - &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). - '___'.$resid.'___'. - &Apache::lonnet::declutter($hash{'src_'.$rid}) - ).'&'; + &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid, + $hash{'src_'.$rid}).'&'; } # --------------------------------------- append randomout entry to environment if ($randomoutentry) { @@ -538,125 +537,168 @@ sub hiddenurls { # ---------------------------------------------------- Read map and all submaps sub readmap { - my $short=shift; - $short=~s/^\///; - my %cenv=&Apache::lonnet::coursedescription($short); - my $fn=$cenv{'fn'}; - my $uri; - $short=~s/\//\_/g; - unless ($uri=$cenv{'url'}) { - &Apache::lonnet::logthis("WARNING: ". - "Could not load course $short."); - return 'No course data available.'; - } - @cond=('true:normal'); - unlink($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)) && - (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) { - %hash=(); - %parmhash=(); - $errtext=''; - $pc=0; - &processversionfile(%cenv); - my $furi=&Apache::lonnet::clutter($uri); - $hash{'src_0.0'}=&versiontrack($furi); - $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title'); - $hash{'ids_'.$furi}='0.0'; - $hash{'is_map_0.0'}=1; - loadmap($uri); - if (defined($hash{'map_start_'.$uri})) { - &traceroute('0',$hash{'map_start_'.$uri},'&'); - &accinit($uri,$short,$fn); - &hiddenurls(); - } + my $short=shift; + $short=~s/^\///; + my %cenv=&Apache::lonnet::coursedescription($short); + my $fn=$cenv{'fn'}; + my $uri; + $short=~s/\//\_/g; + unless ($uri=$cenv{'url'}) { + &Apache::lonnet::logthis("WARNING: ". + "Could not load course $short."); + return 'No course data available.'; + } + @cond=('true:normal'); + + open(LOCKFILE,">$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; + $retfurl=''; + if ($lock && (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT(),0640)) && + (tie(%parmhash,'GDBM_File',$fn.'_parms.db',&GDBM_WRCREAT(),0640))) { + %hash=(); + %parmhash=(); + $errtext=''; + $pc=0; + &processversionfile(%cenv); + my $furi=&Apache::lonnet::clutter($uri); + $hash{'src_0.0'}=&versiontrack($furi); + $hash{'title_0.0'}=&Apache::lonnet::metadata($uri,'title'); + $hash{'ids_'.$furi}='0.0'; + $hash{'is_map_0.0'}=1; + loadmap($uri); + if (defined($hash{'map_start_'.$uri})) { + &Apache::lonnet::appenv("request.course.id" => $short, + "request.course.fn" => $fn, + "request.course.uri" => $uri); + &traceroute('0',$hash{'map_start_'.$uri},'&'); + &accinit($uri,$short,$fn); + &hiddenurls(); + } # ------------------------------------------------------- Put versions into src - foreach (keys %hash) { - if ($_=~/^src\_/) { - $hash{$_}=&putinversion($hash{$_}); + foreach (keys %hash) { + if ($_=~/^src\_/) { + $hash{$_}=&putinversion($hash{$_}); + } } - } # ---------------------------------------------------------------- Encrypt URLs - foreach (keys %encurl) { - $hash{'src_'.$_}=&Apache::lonenc::encrypted($hash{'src_'.$_}); - } + foreach (keys %encurl) { +# $hash{'src_'.$_}=&Apache::lonenc::encrypted($hash{'src_'.$_}); + $hash{'encrypted_'.$_}=1; + } # ----------------------------------------------- Close hashes to finally store # --------------------------------- Routine must pass this point, no early outs - unless ((untie(%hash)) && (untie(%parmhash))) { - &Apache::lonnet::logthis("WARNING: ". - "Could not untie coursemap $fn for $uri."); - } + $hash{'first_url'}=$retfurl; + unless ((untie(%hash)) && (untie(%parmhash))) { + &Apache::lonnet::logthis("WARNING: ". + "Could not untie coursemap $fn for $uri."); + } # ---------------------------------------------------- Store away initial state - { - my $cfh; - if ($cfh=Apache::File->new(">$fn.state")) { - print $cfh join("\n",@cond); - } else { - &Apache::lonnet::logthis("WARNING: ". - "Could not write statemap $fn for $uri."); - } - } - } else { - &Apache::lonnet::logthis("WARNING: ". - "Could not tie coursemap $fn for $uri."); - } - &Apache::lonmsg::author_res_msg($ENV{'request.course.uri'},$errtext); + { + my $cfh; + if (open($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: ". + "Could not tie coursemap $fn for $uri."); + my $i=0; + while($i<90) { + $i++; + sleep(1); + if (flock(LOCKFILE,LOCK_EX|LOCK_NB) && + (tie(%hash,'GDBM_File',"$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, + "request.course.fn" => $fn, + "request.course.uri" => $uri); + untie(%hash); + untie(%parmhash); + last; + } + } + untie(%hash); + untie(%parmhash); + } + flock(LOCKFILE,LOCK_UN); + close(LOCKFILE); + } + &Apache::lonmsg::author_res_msg($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\:/)) { $retfurl='/adm/email?critical=display'; } } - return ($retfurl,$errtext); + return ($retfurl,$errtext); } # ------------------------------------------------------- Evaluate state string sub evalstate { - - my $fn=$ENV{'request.course.fn'}.'.state'; - my $state='2'; + my $fn=$env{'request.course.fn'}.'.state'; + my $state=''; if (-e $fn) { - my @conditions=(); - { - my $fh=Apache::File->new($fn); - @conditions=<$fh>; - } - my $safeeval = new Safe; - my $safehole = new Safe::Hole; - $safeeval->permit("entereval"); - $safeeval->permit(":base_math"); - $safeeval->deny(":base_io"); - $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); - foreach (@conditions) { - my $line=$_; - chomp($line); - my ($condition,$weight)=split(/\:/,$_); - if ($safeeval->reval($condition)) { - if ($weight eq 'force') { - $state.='3'; - } else { - $state.='2'; - } - } else { - if ($weight eq 'stop') { - $state.='0'; - } else { - $state.='1'; - } - } - } + my @conditions=(); + { + my $fh=Apache::File->new($fn); + @conditions=<$fh>; + } + my $safeeval = new Safe; + my $safehole = new Safe::Hole; + $safeeval->permit("entereval"); + $safeeval->permit(":base_math"); + $safeeval->deny(":base_io"); + $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); + foreach my $line (@conditions) { + chomp($line); + my ($condition,$weight)=split(/\:/,$line); + if ($safeeval->reval($condition)) { + if ($weight eq 'force') { + $state.='3'; + } else { + $state.='2'; + } + } else { + if ($weight eq 'stop') { + $state.='0'; + } else { + $state.='1'; + } + } + } } - &Apache::lonnet::appenv('user.state.'.$ENV{'request.course.id'} => $state); + &Apache::lonnet::appenv('user.state.'.$env{'request.course.id'} => $state); return $state; }