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WWW-RobotRules-Extended-0.02
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/ WWW::RobotRules::Extended

NAME

WWW::RobotRules::Extended - database of robots.txt-derived permissions. This is a fork of WWW::RobotRules

You should use WWW::RobotsRules::Extended if you want to act as Googlebot : Google accept some improvments like "allow" directives or wildcards "*" into rules

VERSION

Version 0.02

SYNOPSIS

Quick summary of what the module does.

 use WWW::RobotRules::Extended;
 use LWP::Simple qw(get);
 
 my $rules = WWW::RobotRules::Extended->new('MOMspider/1.0');

 {
   my $url = "http://some.place/robots.txt";
   my $robots_txt = get $url;
   $rules->parse($url, $robots_txt) if defined $robots_txt;
 }

 {
   my $url = "http://some.other.place/robots.txt";
   my $robots_txt = get $url;
   $rules->parse($url, $robots_txt) if defined $robots_txt;
 }

 # Now we can check if a URL is valid for those servers
 # whose "robots.txt" files we've gotten and parsed:
 if($rules->allowed($url)) {
     $c = get $url;
     ...
 }

DESCRIPTION

This module parses /robots.txt files as specified in "A Standard for Robot Exclusion", at <http://www.robotstxt.org/wc/norobots.html>

It also parses rules that contains wildcards '*' and allow directives like Google does.

Webmasters can use the /robots.txt file to forbid conforming robots from accessing parts of their web site.

The parsed files are kept in a WWW::RobotRules::Extended object, and this object provides methods to check if access to a given URL is prohibited. The same WWW::RobotRules::Extended object can be used for one or more parsed /robots.txt files on any number of hosts.

EXPORT

A list of functions that can be exported. You can delete this section if you don't export anything, such as for a purely object-oriented module.

new This is the constructor for WWW::RobotRules::Extended objects. The first argument given to new() is the name of the robot.

parse The parse() method takes as arguments the URL that was used to retrieve the /robots.txt file, and the contents of the file.

 $rules->allowed($uri)

Returns TRUE if this robot is allowed to retrieve this URL.

is_me

allowed

Returns TRUE if this robot is allowed to retrieve this URL.

SUBROUTINES/METHODS

AUTHOR

Yannick Simon, <yannick.simon at gmail.com>

BUGS

Please report any bugs or feature requests to bug-www-robotrules-extended at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=WWW-RobotRules-Extended. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc WWW::RobotRules::Extended

You can also look for information at:

Extended ROBOTS.TXT EXAMPLES

The following example "/robots.txt" file specifies that no robots should visit any URL starting with "/cyberworld/map/" or "/tmp/":

  User-agent: *
  Disallow: /cyberworld/map/ # This is an infinite virtual URL space
  Disallow: /tmp/ # these will soon disappear

This example "/robots.txt" file specifies that no robots should visit any URL starting with "/cyberworld/map/", except the robot called "cybermapper":

  User-agent: *
  Disallow: /cyberworld/map/ # This is an infinite virtual URL space

  # Cybermapper knows where to go.
  User-agent: cybermapper
  Disallow:

This example indicates that no robots should visit this site further:

  # go away
  User-agent: *
  Disallow: /

This is an example of a malformed robots.txt file.

  # robots.txt for ancientcastle.example.com
  # I've locked myself away.
  User-agent: *
  Disallow: /
  # The castle is your home now, so you can go anywhere you like.
  User-agent: Belle
  Disallow: /west-wing/ # except the west wing!
  # It's good to be the Prince...
  User-agent: Beast
  Disallow:

This file is missing the required blank lines between records. However, the intention is clear.

This is an example of an extended robots.txt file tou have a real example of this kind of rules on http://www.google.com/robots.txt

  # Block every url that contains &p=
  User-agent: *
  Disallow: /*&p=

This is an example of an extended robots.txt file.

  # Block every url but the ones that begin with /shared
  User-agent: *
  Disallow: /
  Allow: /shared/

SEE ALSO

LWP::RobotUA, WWW::RobotRules::AnyDBM_File, WWW::RobotRules

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

  Copyright 2011, Yannick Simon
  Copyright 1995-2009, Gisle Aas
  Copyright 1995, Martijn Koster

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.