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Annotation of loncom/cgi/metadata_harvest.pl, revision 1.2

1.1       www         1: #!/usr/bin/perl
                      2: #
                      3: # The LearningOnline Network with CAPA
                      4: #
                      5: # Gets keywords from metadata database.
                      6: #
                      7: # YEAR=2001
                      8: #
                      9: # YEAR=2002
                     10: #
                     11: 
                     12: ###############################################################################
                     13: ##                                                                           ##
                     14: ## ORGANIZATION OF THIS PERL CGI SCRIPT                                      ##
                     15: ##                                                                           ##
                     16: ## 1. Status of this code                                                    ##
                     17: ## 2. Purpose and description of program                                     ##
                     18: ## 3. Modules used by this script                                            ##
                     19: ## 4. Print MIME Content-type and other initialization                       ##
                     20: ## 5. Make sure database can be accessed and that this is a library server   ##
                     21: ## 6. Loop through database records and print out keywords                   ##
                     22: ##                                                                           ##
                     23: ###############################################################################
                     24: 
                     25: # --------------------------------------------------------- Status of this code
                     26: #
                     27: # 1=horrible 2=poor 3=fair 4=good 5=excellent
                     28: # Organization 5
                     29: # Functionality 4
                     30: # Has it been tested? 4
                     31: #
                     32: 
                     33: # ------------------------------------------ Purpose and description of program
                     34: #
                     35: # This program outputs one line per database entry.
                     36: # The line is to be a list of keywords separated by commas.
                     37: # The file is to be output as a text file on a browser (text/plain).
                     38: # This provides initial data by which to study common and uncommon
                     39: # keywords being used.
                     40: # Note that the authoritative copy of metadata "keywords" is in the
                     41: # .meta files that are native to the library server.  We rely
                     42: # on the assumption that it is okay to use the MySQL server (which
                     43: # should reflect this information) instead.  This is a speedier approach.
                     44: 
                     45: # ------------------------------------------------- Modules used by this script
                     46: 
                     47: use lib '/home/httpd/lib/perl/';
                     48: use LONCAPA::Configuration;
                     49: 
                     50: use strict;
                     51: use DBI;
                     52: 
                     53: # ---------------------------- Print MIME Content-type and other initialization
                     54: $|=1;
                     55: print 'Content-type: text/plain'."\n\n";
                     56: 
                     57: # --- Make sure that database can be accessed and that this is a library server
                     58: # library server test
                     59: 
                     60: # By default, loncapa_apache.conf is also read by the read_conf subroutine.
                     61: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
                     62: my %perlvar=%{$perlvarref};
                     63: undef($perlvarref);
                     64: 
                     65: unless ($perlvar{'lonRole'} eq 'library') {
                     66:     print "This can only be run on a library server!\n";
                     67:     exit;
                     68: }
                     69: # database test
                     70: my $dbh;
                     71: {
                     72:     unless (
                     73: 	    $dbh = DBI->connect("DBI:mysql:loncapa","www",
                     74: 				$perlvar{'lonSqlAccess'},
                     75: 				{ RaiseError =>0,PrintError=>0})
                     76: 	    ) { 
                     77: 	print "Cannot connect to database!\n";
                     78: 	exit;
                     79:     }
                     80: }
                     81: %perlvar=(); # undefine it
                     82: 
                     83: # ------------------------ Loop through database records and print out keywords
                     84: my $sth=$dbh->prepare("select * from metadata");
                     85: $sth->execute();
                     86: my @row;
                     87: while (@row=$sth->fetchrow_array) {
                     88:     for (my $i=0;$i<=$#row;$i++) {
                     89:         $row[$i]=~s/\n/ /g;
                     90:         $row[$i]=~s/\|/ /g;
                     91:     }
                     92:     print join('|',@row)."\n";
                     93: }
                     94: 
                     95: # --------------------------------------------------- Close database connection
                     96: $dbh->disconnect();