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Annotation of loncom/metadata_database/searchcat.pl, revision 1.7

1.1       harris41    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # searchcat.pl "Search Catalog" batch script
                      4: 
                      5: # 04/14/2001 Scott Harrison
                      6: 
                      7: # This script goes through a LON-CAPA resource
                      8: # directory and gathers metadata.
                      9: # The metadata is entered into a SQL database.
                     10: 
                     11: use IO::File;
                     12: use HTML::TokeParser;
1.6       harris41   13: use DBI;
1.1       harris41   14: 
                     15: my @metalist;
                     16: # ----------------- Code to enable 'find' subroutine listing of the .meta files
                     17: require "find.pl";
                     18: sub wanted {
                     19:     (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
                     20:     -f _ &&
                     21:     /^.*\.meta$/ &&
                     22:     push(@metalist,"$dir/$_");
                     23: }
                     24: 
                     25: # ------------------------------------ Read httpd access.conf and get variables
                     26: open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf";
                     27: 
                     28: while ($configline=<CONFIG>) {
                     29:     if ($configline =~ /PerlSetVar/) {
                     30: 	my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
                     31:         chomp($varvalue);
                     32:         $perlvar{$varname}=$varvalue;
                     33:     }
                     34: }
                     35: close(CONFIG);
                     36: 
1.3       harris41   37: my $dbh;
1.1       harris41   38: # ------------------------------------- Make sure that database can be accessed
                     39: {
                     40:     unless (
                     41: 	    $dbh = DBI->connect("DBI:mysql:loncapa","www",$perlvar{'lonSqlAccess'},{ RaiseError =>0,PrintError=>0})
                     42: 	    ) { 
                     43: 	print "Cannot connect to database!\n";
                     44: 	exit;
                     45:     }
                     46: }
                     47: 
                     48: # ------------------------------------------------------------- get .meta files
1.2       harris41   49: opendir(RESOURCES,"$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}");
                     50: my @homeusers=grep
                     51:           {&ishome("$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}/$_")}
                     52:           grep {!/^\.\.?$/} readdir(RESOURCES);
                     53: closedir RESOURCES;
                     54: foreach my $user (@homeusers) {
                     55:     &find("$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}/$user");
                     56: }
1.1       harris41   57: 
                     58: # -- process each file to get metadata and put into search catalog SQL database
                     59: foreach my $m (@metalist) {
                     60:     my $ref=&metadata($m);
                     61:     my $sth=$dbh->prepare('insert into metadata values ('.
1.7     ! harris41   62: 			  delete($ref->{'title'}).','.
1.1       harris41   63: 			  delete($ref->{'author'}).','.
                     64: 			  delete($ref->{'subject'}).','.
                     65: 			  delete($ref->{'url'}).','.
                     66: 			  delete($ref->{'keywords'}).','.
                     67: 			  delete($ref->{'version'}).','.
                     68: 			  delete($ref->{'notes'}).','.
                     69: 			  delete($ref->{'abstract'}).','.
                     70: 			  delete($ref->{'mime'}).','.
                     71: 			  delete($ref->{'language'}).','.
                     72: 			  delete($ref->{'creationdate'}).','.
                     73: 			  delete($ref->{'lastrevisiondate'}).','.
                     74: 			  delete($ref->{'owner'}).','.
1.5       harris41   75: 			  delete($ref->{'copyright'}));
1.1       harris41   76:     $sth->execute();
                     77: }
                     78: 
                     79: # ----------------------------------------------------------- Clean up database
                     80: # Need to, perhaps, remove stale SQL database records.
                     81: # ... not yet implemented
                     82: 
                     83: # --------------------------------------------------- Close database connection
                     84: $dbh->disconnect;
                     85: 
                     86: # ---------------------------------------------------------------- Get metadata
                     87: # significantly altered from subroutine present in lonnet
                     88: sub metadata {
                     89:     my ($uri,$what)=@_;
                     90:     my %metacache;
                     91:     $uri=&declutter($uri);
                     92:     my $filename=$uri;
                     93:     $uri=~s/\.meta$//;
                     94:     $uri='';
                     95:     unless ($metacache{$uri.'keys'}) {
                     96:         unless ($filename=~/\.meta$/) { $filename.='.meta'; }
                     97: 	my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
                     98:         my $parser=HTML::TokeParser->new(\$metastring);
                     99:         my $token;
                    100:         while ($token=$parser->get_token) {
                    101:            if ($token->[0] eq 'S') {
                    102: 	      my $entry=$token->[1];
                    103:               my $unikey=$entry;
                    104:               if (defined($token->[2]->{'part'})) { 
                    105:                  $unikey.='_'.$token->[2]->{'part'}; 
                    106: 	      }
                    107:               if (defined($token->[2]->{'name'})) { 
                    108:                  $unikey.='_'.$token->[2]->{'name'}; 
                    109: 	      }
                    110:               if ($metacache{$uri.'keys'}) {
                    111:                  $metacache{$uri.'keys'}.=','.$unikey;
                    112:               } else {
                    113:                  $metacache{$uri.'keys'}=$unikey;
                    114: 	      }
                    115:               map {
                    116: 		  $metacache{$uri.''.$unikey.'.'.$_}=$token->[2]->{$_};
                    117:               } @{$token->[3]};
                    118:               unless (
                    119:                  $metacache{$uri.''.$unikey}=$parser->get_text('/'.$entry)
                    120: 		      ) { $metacache{$uri.''.$unikey}=
                    121: 			      $metacache{$uri.''.$unikey.'.default'};
                    122: 		      }
                    123:           }
                    124:        }
                    125:     }
                    126:     return \%metacache;
                    127: }
                    128: 
                    129: # ------------------------------------------------------------ Serves up a file
                    130: # returns either the contents of the file or a -1
                    131: sub getfile {
                    132:   my $file=shift;
                    133:   if (! -e $file ) { return -1; };
                    134:   my $fh=IO::File->new($file);
                    135:   my $a='';
                    136:   while (<$fh>) { $a .=$_; }
                    137:   return $a
                    138: }
                    139: 
                    140: # ------------------------------------------------------------- Declutters URLs
                    141: sub declutter {
                    142:     my $thisfn=shift;
                    143:     $thisfn=~s/^$perlvar{'lonDocRoot'}//;
                    144:     $thisfn=~s/^\///;
                    145:     $thisfn=~s/^res\///;
                    146:     return $thisfn;
                    147: }
1.2       harris41  148: 
                    149: # --------------------------------------- Is this the home server of an author?
                    150: # (copied from lond, modification of the return value)
                    151: sub ishome {
                    152:     my $author=shift;
                    153:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                    154:     my ($udom,$uname)=split(/\//,$author);
                    155:     my $proname=propath($udom,$uname);
                    156:     if (-e $proname) {
                    157: 	return 1;
                    158:     } else {
                    159:         return 0;
                    160:     }
                    161: }
                    162: 
                    163: # -------------------------------------------- Return path to profile directory
                    164: # (copied from lond)
                    165: sub propath {
                    166:     my ($udom,$uname)=@_;
                    167:     $udom=~s/\W//g;
                    168:     $uname=~s/\W//g;
                    169:     my $subdir=$uname.'__';
                    170:     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
                    171:     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
                    172:     return $proname;
                    173: }