Parse::MediaWikiDump::Pages (3pm)

This object is used to access the metadata associated with a MediaWiki instance and provide an iterative interface for extracting the individual articles out of the same. This module does not allow more than one revision for each specific article; to parse a comprehensive dump file use the Parse::MediaWikiDump::Revisions object.

  $pmwd = Parse::MediaWikiDump->new;
  $pages = $pmwd->pages('pages-articles.xml');
  $pages = $pmwd->pages(\*FILEHANDLE);

  #print the title and id of each article inside the dump file
  while(defined($page = $pages->next)) {
    print "title '", $page->title, "' id ", $page->id, "\n";
  }

This software is being \s-1RETIRED\s0 - MediaWiki::DumpFile is the official successor to Parse::MediaWikiDump and includes a compatibility library called MediaWiki::DumpFile::Compat that is 100% \s-1API\s0 compatible and is a near perfect standin for this module. It is faster in all instances where it counts and is actively maintained. Any undocumented deviation of MediaWiki::DumpFile::Compat from Parse::MediaWikiDump is considered a bug and will be fixed.

Open the specified MediaWiki dump file. If the single argument to this method is a string it will be used as the path to the file to open. If the argument is a reference to a filehandle the contents will be read from the filehandle as specified. Returns an instance of the next available Parse::MediaWikiDump::page object or returns undef if there are no more articles left. Returns a plain text string of the dump file format revision number Returns a plain text string that is the name of the MediaWiki instance. Returns the \s-1URL\s0 to the instances main article in the form of a string. Returns a string containing 'MediaWiki' and a version number of the instance that dumped this file. Example: 'MediaWiki 1.14alpha' Returns a string describing the case sensitivity configured in the instance. Returns a reference to an array of references. Each reference is to another array with the first item being the unique identifier of the namespace and the second element containing a string that is the name of the namespace. Returns an array reference the array contains strings of all the namespaces each as an element. Returns the number of bytes that has been processed so far Returns the total size of the dump file in bytes.

Scan an article dump file for double redirects that exist in the most recent article revision

#!/usr/bin/perl

#progress information goes to STDERR, a list of double redirects found #goes to STDOUT

binmode(STDOUT, ":utf8"); binmode(STDERR, ":utf8");

use strict; use warnings; use Parse::MediaWikiDump;

my $file = shift(@ARGV); my $pmwd = Parse::MediaWikiDump->new; my $pages; my $page; my %redirs; my $artcount = 0; my $file_size; my $start = time;

if (defined($file)) { $file_size = (stat($file))[7]; $pages = $pmwd->pages($file); } else { print STDERR "No file specified, using standard input\n"; $pages = $pmwd->pages(\*STDIN); }

#the case of the first letter of titles is ignored - force this option #because the other values of the case setting are unknown die 'this program only supports the first-letter case setting' unless $pages->case eq 'first-letter';

print STDERR "Analyzing articles:\n";

while(defined($page = $pages->next)) { update_ui() if ++$artcount % 500 == 0;

#main namespace only next unless $page->namespace eq ''; next unless defined($page->redirect);

my $title = case_fixer($page->title); #create a list of redirects indexed by their original name $redirs{$title} = case_fixer($page->redirect); }

my $redir_count = scalar(keys(%redirs)); print STDERR "done; searching $redir_count redirects:\n";

my $count = 0;

#if a redirect location is also a key to the index we have a double redirect foreach my $key (keys(%redirs)) { my $redirect = $redirs{$key};

if (defined($redirs{$redirect})) { print "$key\n"; $count++; } }

print STDERR "discovered $count double redirects\n";

#removes any case sensativity from the very first letter of the title #but not from the optional namespace name sub case_fixer { my $title = shift;

#check for namespace if ($title =~ /^(.+?):(.+)/) { $title = $1 . ':' . ucfirst($2); } else { $title = ucfirst($title); }

return $title; }

sub pretty_bytes { my $bytes = shift; my $pretty = int($bytes) . ' bytes';

if (($bytes = $bytes / 1024) > 1) { $pretty = int($bytes) . ' kilobytes'; }

if (($bytes = $bytes / 1024) > 1) { $pretty = sprintf("%0.2f", $bytes) . ' megabytes'; }

if (($bytes = $bytes / 1024) > 1) { $pretty = sprintf("%0.4f", $bytes) . ' gigabytes'; }

return $pretty; }

sub pretty_number { my $number = reverse(shift); $number =~ s/(...)/$1,/g; $number = reverse($number); $number =~ s/^,//;

return $number; }

sub update_ui { my $seconds = time - $start; my $bytes = $pages->current_byte;

print STDERR " ", pretty_number($artcount), " articles; "; print STDERR pretty_bytes($bytes), " processed; ";

if (defined($file_size)) { my $percent = int($bytes / $file_size * 100);

print STDERR "$percent% completed\n"; } else { my $bytes_per_second = int($bytes / $seconds); print STDERR pretty_bytes($bytes_per_second), " per second\n"; } }

Version 0.4

This class was updated to support version 0.4 dump files from a MediaWiki instance but it does not currently support any of the new information available in those files.