#!/usr/bin/perl
# The LearningOnline Network
# searchcat.pl "Search Catalog" batch script
# 04/14/2001 Scott Harrison
# This script goes through a LON-CAPA resource
# directory and gathers metadata.
# The metadata is entered into a SQL database.
use strict;
use IO::File;
use HTML::TokeParser;
my @metalist;
# ----------------- Code to enable 'find' subroutine listing of the .meta files
require "find.pl";
sub wanted {
(($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
-f _ &&
/^.*\.meta$/ &&
push(@metalist,"$dir/$_");
}
# ------------------------------------ Read httpd access.conf and get variables
open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf";
while ($configline=<CONFIG>) {
if ($configline =~ /PerlSetVar/) {
my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
chomp($varvalue);
$perlvar{$varname}=$varvalue;
}
}
close(CONFIG);
# ------------------------------------- Make sure that database can be accessed
{
my $dbh;
unless (
$dbh = DBI->connect("DBI:mysql:loncapa","www",$perlvar{'lonSqlAccess'},{ RaiseError =>0,PrintError=>0})
) {
print "Cannot connect to database!\n";
exit;
}
}
# ------------------------------------------------------------- get .meta files
# need to actually loop over existing users here.. will fix soon
&find("$perlvar{'lonDocRoot'}/res");
# -- process each file to get metadata and put into search catalog SQL database
foreach my $m (@metalist) {
my $ref=&metadata($m);
my $sth=$dbh->prepare('insert into metadata values ('.
delete($ref->{'title'}),
delete($ref->{'author'}).','.
delete($ref->{'subject'}).','.
delete($ref->{'url'}).','.
delete($ref->{'keywords'}).','.
delete($ref->{'version'}).','.
delete($ref->{'notes'}).','.
delete($ref->{'abstract'}).','.
delete($ref->{'mime'}).','.
delete($ref->{'language'}).','.
delete($ref->{'creationdate'}).','.
delete($ref->{'lastrevisiondate'}).','.
delete($ref->{'owner'}).','.
delete($ref->{'copyright'}).
')';
$sth->execute();
}
# ----------------------------------------------------------- Clean up database
# Need to, perhaps, remove stale SQL database records.
# ... not yet implemented
# --------------------------------------------------- Close database connection
$dbh->disconnect;
# ---------------------------------------------------------------- Get metadata
# significantly altered from subroutine present in lonnet
sub metadata {
my ($uri,$what)=@_;
my %metacache;
$uri=&declutter($uri);
my $filename=$uri;
$uri=~s/\.meta$//;
$uri='';
unless ($metacache{$uri.'keys'}) {
unless ($filename=~/\.meta$/) { $filename.='.meta'; }
my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
my $parser=HTML::TokeParser->new(\$metastring);
my $token;
while ($token=$parser->get_token) {
if ($token->[0] eq 'S') {
my $entry=$token->[1];
my $unikey=$entry;
if (defined($token->[2]->{'part'})) {
$unikey.='_'.$token->[2]->{'part'};
}
if (defined($token->[2]->{'name'})) {
$unikey.='_'.$token->[2]->{'name'};
}
if ($metacache{$uri.'keys'}) {
$metacache{$uri.'keys'}.=','.$unikey;
} else {
$metacache{$uri.'keys'}=$unikey;
}
map {
$metacache{$uri.''.$unikey.'.'.$_}=$token->[2]->{$_};
} @{$token->[3]};
unless (
$metacache{$uri.''.$unikey}=$parser->get_text('/'.$entry)
) { $metacache{$uri.''.$unikey}=
$metacache{$uri.''.$unikey.'.default'};
}
}
}
}
return \%metacache;
}
# ------------------------------------------------------------ Serves up a file
# returns either the contents of the file or a -1
sub getfile {
my $file=shift;
if (! -e $file ) { return -1; };
my $fh=IO::File->new($file);
my $a='';
while (<$fh>) { $a .=$_; }
return $a
}
# ------------------------------------------------------------- Declutters URLs
sub declutter {
my $thisfn=shift;
$thisfn=~s/^$perlvar{'lonDocRoot'}//;
$thisfn=~s/^\///;
$thisfn=~s/^res\///;
return $thisfn;
}
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