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Annotation of loncom/cgi/metadata_keywords.pl, revision 1.6

1.1       harris41    1: #!/usr/bin/perl
1.6     ! albertel    2: # Gets keywords from metadata database.
        !             3: # $Id: gplheader.pl,v 1.1 2001/11/29 18:19:27 www Exp $
        !             4: #
        !             5: # Copyright Michigan State University Board of Trustees
        !             6: #
        !             7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
1.1       harris41    8: #
1.6     ! albertel    9: # LON-CAPA is free software; you can redistribute it and/or modify
        !            10: # it under the terms of the GNU General Public License as published by
        !            11: # the Free Software Foundation; either version 2 of the License, or
        !            12: # (at your option) any later version.
1.1       harris41   13: #
1.6     ! albertel   14: # LON-CAPA is distributed in the hope that it will be useful,
        !            15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            17: # GNU General Public License for more details.
        !            18: #
        !            19: # You should have received a copy of the GNU General Public License
        !            20: # along with LON-CAPA; if not, write to the Free Software
        !            21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
1.1       harris41   22: #
1.6     ! albertel   23: # /home/httpd/html/adm/gpl.txt
1.1       harris41   24: #
1.6     ! albertel   25: # http://www.lon-capa.org/
1.3       harris41   26: #
1.6     ! albertel   27: 
1.1       harris41   28: 
                     29: ###############################################################################
                     30: ##                                                                           ##
                     31: ## ORGANIZATION OF THIS PERL CGI SCRIPT                                      ##
                     32: ##                                                                           ##
                     33: ## 1. Status of this code                                                    ##
                     34: ## 2. Purpose and description of program                                     ##
                     35: ## 3. Modules used by this script                                            ##
                     36: ## 4. Print MIME Content-type and other initialization                       ##
                     37: ## 5. Make sure database can be accessed and that this is a library server   ##
                     38: ## 6. Loop through database records and print out keywords                   ##
                     39: ##                                                                           ##
                     40: ###############################################################################
                     41: 
                     42: # --------------------------------------------------------- Status of this code
                     43: #
                     44: # 1=horrible 2=poor 3=fair 4=good 5=excellent
                     45: # Organization 5
                     46: # Functionality 4
1.3       harris41   47: # Has it been tested? 4
1.1       harris41   48: #
                     49: 
                     50: # ------------------------------------------ Purpose and description of program
                     51: #
                     52: # This program outputs one line per database entry.
                     53: # The line is to be a list of keywords separated by commas.
                     54: # The file is to be output as a text file on a browser (text/plain).
                     55: # This provides initial data by which to study common and uncommon
                     56: # keywords being used.
                     57: # Note that the authoritative copy of metadata "keywords" is in the
                     58: # .meta files that are native to the library server.  We rely
                     59: # on the assumption that it is okay to use the MySQL server (which
                     60: # should reflect this information) instead.  This is a speedier approach.
                     61: 
                     62: # ------------------------------------------------- Modules used by this script
1.3       harris41   63: 
                     64: use lib '/home/httpd/lib/perl/';
                     65: use LONCAPA::Configuration;
                     66: 
1.1       harris41   67: use strict;
                     68: use DBI;
                     69: 
                     70: # ---------------------------- Print MIME Content-type and other initialization
                     71: $|=1;
                     72: print 'Content-type: text/plain'."\n\n";
                     73: 
                     74: # --- Make sure that database can be accessed and that this is a library server
                     75: # library server test
1.4       harris41   76: 
                     77: # By default, loncapa_apache.conf is also read by the read_conf subroutine.
                     78: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.3       harris41   79: my %perlvar=%{$perlvarref};
                     80: undef($perlvarref);
                     81: 
1.1       harris41   82: unless ($perlvar{'lonRole'} eq 'library') {
                     83:     print "This can only be run on a library server!\n";
                     84:     exit;
                     85: }
                     86: # database test
                     87: my $dbh;
                     88: {
                     89:     unless (
                     90: 	    $dbh = DBI->connect("DBI:mysql:loncapa","www",
                     91: 				$perlvar{'lonSqlAccess'},
                     92: 				{ RaiseError =>0,PrintError=>0})
                     93: 	    ) { 
                     94: 	print "Cannot connect to database!\n";
                     95: 	exit;
                     96:     }
                     97: }
                     98: %perlvar=(); # undefine it
                     99: 
                    100: # ------------------------ Loop through database records and print out keywords
                    101: my $sth=$dbh->prepare("select * from metadata");
                    102: $sth->execute();
                    103: my @row;
                    104: while (@row=$sth->fetchrow_array) {
1.2       harris41  105:     print $row[4]."\n";
1.1       harris41  106: }
                    107: 
                    108: # --------------------------------------------------- Close database connection
                    109: $dbh->disconnect();