12-07-2009
Quote:
Originally Posted by
jim mcnamara
Links have consequences. One of them is that you do not ever want dangling links - links "aimed" at non-existent. It is possible to create a series: link -> link -> physical file. This is where it is easy to get in trouble. You can create circular links in some circumstances.
By design, you cannot have dangling links when dealing with hard-links. They can only exist in the context of symlinks.
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LEARN ABOUT DEBIAN
parse::mediawikidump::links
Parse::MediaWikiDump::Links(3pm) User Contributed Perl Documentation Parse::MediaWikiDump::Links(3pm)
NAME
Parse::MediaWikiDump::Links - Object capable of processing link dump files
ABOUT
This object is used to access content of the SQL based category dump files by providing an iterative interface for extracting the
indidivual article links to the same. Objects returned are an instance of Parse::MediaWikiDump::link.
SYNOPSIS
$pmwd = Parse::MediaWikiDump->new;
$links = $pmwd->links('pagelinks.sql');
$links = $pmwd->links(*FILEHANDLE);
#print the links between articles
while(defined($link = $links->next)) {
print 'from ', $link->from, ' to ', $link->namespace, ':', $link->to, "
";
}
STATUS
This software is being RETIRED - MediaWiki::DumpFile is the official successor to Parse::MediaWikiDump and includes a compatibility library
called MediaWiki::DumpFile::Compat that is 100% API 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.
METHODS
Parse::MediaWikiDump::Links->new
Create a new instance of a page links dump file parser
$links->next
Return the next available Parse::MediaWikiDump::link object or undef if there is no more data left
EXAMPLE
List all links between articles in a friendly way
#!/usr/bin/perl
use strict;
use warnings;
use Parse::MediaWikiDump;
my $pmwd = Parse::MediaWikiDump->new;
my $links = $pmwd->links(shift) or die "must specify a pagelinks dump file";
my $dump = $pmwd->pages(shift) or die "must specify an article dump file";
my %id_to_namespace;
my %id_to_pagename;
binmode(STDOUT, ':utf8');
#build a map between namespace ids to namespace names
foreach (@{$dump->namespaces}) {
my $id = $_->[0];
my $name = $_->[1];
$id_to_namespace{$id} = $name;
}
#build a map between article ids and article titles
while(my $page = $dump->next) {
my $id = $page->id;
my $title = $page->title;
$id_to_pagename{$id} = $title;
}
$dump = undef; #cleanup since we don't need it anymore
while(my $link = $links->next) {
my $namespace = $link->namespace;
my $from = $link->from;
my $to = $link->to;
my $namespace_name = $id_to_namespace{$namespace};
my $fully_qualified;
my $from_name = $id_to_pagename{$from};
if ($namespace_name eq '') {
#default namespace
$fully_qualified = $to;
} else {
$fully_qualified = "$namespace_name:$to";
}
print "Article "$from_name" links to "$fully_qualified"
";
}
perl v5.10.1 2010-12-05 Parse::MediaWikiDump::Links(3pm)