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Annotation of loncom/cgi/metadata_harvest.pl, revision 1.5

1.1       www         1: #!/usr/bin/perl
1.3       albertel    2: # Inserts metadata from .meta files into the mysql database
1.5     ! raeburn     3: # $Id: metadata_harvest.pl,v 1.4 2008/11/28 20:50:25 raeburn Exp $
1.1       www         4: #
1.3       albertel    5: # Copyright Michigan State University Board of Trustees
1.1       www         6: #
1.3       albertel    7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
1.1       www         8: #
1.3       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       www        13: #
1.3       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.
1.1       www        18: #
1.3       albertel   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
                     22: #
                     23: # /home/httpd/html/adm/gpl.txt
                     24: #
                     25: # http://www.lon-capa.org/
                     26: #
                     27: 
1.1       www        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
                     47: # Has it been tested? 4
                     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
                     63: 
1.4       raeburn    64: $|=1;
                     65: use strict;
                     66: use DBI;
1.1       www        67: use lib '/home/httpd/lib/perl/';
1.4       raeburn    68: use Apache::lonlocal;
1.1       www        69: use LONCAPA::Configuration;
1.4       raeburn    70: use LONCAPA::loncgi;
1.5     ! raeburn    71: use LONCAPA::lonauthcgi;
1.1       www        72: 
                     73: # ---------------------------- Print MIME Content-type and other initialization
                     74: print 'Content-type: text/plain'."\n\n";
                     75: 
1.4       raeburn    76: &main();
                     77: 
                     78: sub main {
1.5     ! raeburn    79:     if (!&LONCAPA::lonauthcgi::check_ipbased_access('metadata_harvest')) {
1.4       raeburn    80:         if (!&LONCAPA::loncgi::check_cookie_and_load_env()) {
                     81:             &Apache::lonlocal::get_language_handle();
                     82:             print(&LONCAPA::loncgi::missing_cookie_msg());
                     83:             return;
                     84:         }
                     85: 
1.5     ! raeburn    86:         if (!&LONCAPA::lonauthcgi::can_view('metadata_harvest')) {
1.4       raeburn    87:             &Apache::lonlocal::get_language_handle();
1.5     ! raeburn    88:             print(&LONCAPA::lonauthcgi::unauthorized_msg('metadata_harvest'));
1.4       raeburn    89:             return;
                     90:         }
                     91:     }
                     92: 
                     93:     &Apache::lonlocal::get_language_handle();
                     94: 
1.1       www        95: # --- Make sure that database can be accessed and that this is a library server
                     96: # library server test
                     97: 
                     98: # By default, loncapa_apache.conf is also read by the read_conf subroutine.
1.4       raeburn    99:     my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
                    100:     my %perlvar=%{$perlvarref};
                    101:     undef($perlvarref);
                    102: 
                    103:     unless ($perlvar{'lonRole'} eq 'library') {
                    104:         print(&Apache::lonlocal::mt('This can only be run on a library server!')."\n");
                    105:         return;
                    106:     }
1.1       www       107: # database test
1.4       raeburn   108:     my $dbh;
                    109:     {
                    110:         unless (
                    111: 	        $dbh = DBI->connect("DBI:mysql:loncapa","www",
                    112: 				    $perlvar{'lonSqlAccess'},
                    113: 				    { RaiseError =>0,PrintError=>0})
                    114: 	        ) { 
                    115: 	    print "Cannot connect to database!\n";
                    116: 	    return;
                    117:         }
1.1       www       118:     }
1.4       raeburn   119:     %perlvar=(); # undefine it
1.1       www       120: 
                    121: # ------------------------ Loop through database records and print out keywords
1.4       raeburn   122:     my $sth=$dbh->prepare("select * from metadata");
                    123:     $sth->execute();
                    124:     my @row;
                    125:     while (@row=$sth->fetchrow_array) {
                    126:         for (my $i=0;$i<=$#row;$i++) {
                    127:             $row[$i]=~s/\n/ /g;
                    128:             $row[$i]=~s/\|/ /g;
                    129:         }
                    130:         print join('|',@row)."\n";
1.1       www       131:     }
                    132: 
                    133: # --------------------------------------------------- Close database connection
1.4       raeburn   134:     $dbh->disconnect();
                    135:     return;
                    136: }