Return to metadata_keywords.pl CVS log

Up to [LON-CAPA] / loncom / cgi

- Add localization
- Add &main() subroutine
- Access control uses routines from LONCAPA::loncgi

    1: #!/usr/bin/perl
    2: # Gets keywords from metadata database.
    3: # $Id: metadata_keywords.pl,v 1.7 2008/11/28 20:50:25 raeburn Exp $
    4: #
    5: # Copyright Michigan State University Board of Trustees
    6: #
    7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    8: #
    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.
   13: #
   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
   22: #
   23: # /home/httpd/html/adm/gpl.txt
   24: #
   25: # http://www.lon-capa.org/
   26: #
   27: 
   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: 
   64: 
   65: $|=1;
   66: use strict;
   67: use DBI;
   68: use lib '/home/httpd/lib/perl/';
   69: use Apache::lonlocal;
   70: use LONCAPA::Configuration;
   71: use LONCAPA::loncgi;
   72: 
   73: # ---------------------------- Print MIME Content-type and other initialization
   74: print 'Content-type: text/plain'."\n\n";
   75: 
   76: &main();
   77: 
   78: sub main {
   79:     if (!&LONCAPA::loncgi::check_ipbased_access('metadatakeywords')) {
   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: 
   86:         if (!&LONCAPA::loncgi::can_view('metadata_keywords')) {
   87:             &Apache::lonlocal::get_language_handle();
   88:             print(&LONCAPA::loncgi::unauthorized_msg('metadata_keywords'));
   89:             return;
   90:         }
   91:     }
   92: 
   93:     &Apache::lonlocal::get_language_handle();
   94: 
   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.
   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:     }
  107: 
  108: # database test
  109:     my $dbh;
  110:     {
  111:         unless (
  112:     	        $dbh = DBI->connect("DBI:mysql:loncapa","www",
  113: 				    $perlvar{'lonSqlAccess'},
  114: 				    { RaiseError =>0,PrintError=>0})
  115: 	       ) { 
  116: 	    print "Cannot connect to database!\n";
  117: 	    return;
  118:         }
  119:     }
  120:     %perlvar=(); # undefine it
  121: 
  122: # ------------------------ Loop through database records and print out keywords
  123:     my $sth=$dbh->prepare("select * from metadata");
  124:     $sth->execute();
  125:     my @row;
  126:     while (@row=$sth->fetchrow_array) {
  127:         print $row[4]."\n";
  128:     }
  129: 
  130: # --------------------------------------------------- Close database connection
  131:     $dbh->disconnect();
  132:     return;
  133: }