Dart

Must-Match Patterns

See more Spider Examples

You may restrict the spider to only follow links that match any one of a set of "must-match" wildcard patterns. The AddMustMatchPattern can be called repeatedly to add must-match patterns. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final spider = CkSpider();

  // --------------------------------------------------------------------
  // Note: The URLs in this example are no longer valid.
  // You should replace the URLs with URLs from a site of your
  // own choosing -- preferably your own site if testing.
  // (Google's Directory no longer exists.)
  // --------------------------------------------------------------------

  // First, we'll get the outbound links for a page in the
  // Google directory.  Then we'll add some must-match
  // and then re-fetch, to see it work...

  spider.initialize('directory.google.com');
  spider.addUnspidered('http://directory.google.com/Top/Recreation/Outdoors/Hiking/Backpacking/');

  spider.crawlNext();

  // Display the outbound links
  final url = '';
  for (var i = 0; i < spider.numOutboundLinks; i++) {
    print(spider.getOutboundLink(i));
  }

  // The output:
  // http://www.backpacker.com
  // http://www.cmc.org
  // http://www.backpacking.net
  // http://www.thebackpacker.com/
  // http://www.rei.com/online/store/LearnShareArticlesList?categoryId=Camping
  // http://www.trailspace.com/
  // http://www.catskillhikes.com/
  // http://gorp.away.com/gorp/location/asia/nepal/favpicks.htm
  // http://www.backpackinglight.com/cgi-bin/backpackinglight/index.html
  // http://www.yetizone.com/
  // http://www.backpackingfun.com
  // http://www.freezerbagcooking.com/
  // http://www.spadout.com/backpacking/
  // http://sierrabackpacker.com
  // http://www.abovecalifornia.com/
  // http://www.personal.psu.edu/faculty/r/p/rpc1/bbb/
  // http://www.thebackpackersguide.com
  // http://www.journeywest.com/WB/index.html
  // http://www.johann-sandra.com/backpackdir.htm
  // http://www.geocities.com/amytys/
  // http://www.cloudwalkersbasecamp.com
  // http://www.netbackpacking.com
  // http://members.tripod.com/~stooges/
  // http://www.thebackpackingsite.com
  // http://www.thruhikers.com/
  // http://www.redcompservices.com/AT/
  // http://members.aol.com/CMorHiker/backpack
  // http://mywebpages.comcast.net/midwestpacker/
  // http://www.midwesthiker.com/
  // http://www.WeBackpack.com
  // http://www.michiganhiker.com
  // http://www.host33.com/backpack/
  // http://www.wilderness-backpacking.com
  // http://www.thetravelmonkey.net
  // http://dmoz.org/cgi-bin/add.cgi?where=Recreation/Outdoors/Hiking/Backpacking
  // http://dmoz.org/about.html
  // http://dmoz.org/cgi-bin/apply.cgi?where=Recreation/Outdoors/Hiking/Backpacking
  // http://dmoz.org
  // http://dmoz.org/profiles/cdog.html
  // http://dmoz.org/profiles/justinwp.html

  // Do it again, but this time with avoid patterns.
  spider.initialize('directory.google.com');
  spider.addUnspidered('http://directory.google.com/Top/Recreation/Outdoors/Hiking/Backpacking/');

  // Add some must-match patterns:
  spider.addMustMatchPattern('*.com/*');
  spider.addMustMatchPattern('*.net/*');

  // Add some avoid-patterns:
  spider.addAvoidOutboundLinkPattern('*.mypages.*');
  spider.addAvoidOutboundLinkPattern('*.personal.*');
  spider.addAvoidOutboundLinkPattern('*.comcast.*');
  spider.addAvoidOutboundLinkPattern('*.aol.*');
  spider.addAvoidOutboundLinkPattern('*~*');

  spider.crawlNext();

  print('-----------------------');

  // Display the outbound links
  for (var i = 0; i < spider.numOutboundLinks; i++) {
    print(spider.getOutboundLink(i));
  }

  // Output:
  // http://www.thebackpacker.com/
  // http://www.rei.com/online/store/LearnShareArticlesList?categoryId=Camping
  // http://www.trailspace.com/
  // http://www.catskillhikes.com/
  // http://gorp.away.com/gorp/location/asia/nepal/favpicks.htm
  // http://www.backpackinglight.com/cgi-bin/backpackinglight/index.html
  // http://www.yetizone.com/
  // http://www.freezerbagcooking.com/
  // http://www.spadout.com/backpacking/
  // http://www.abovecalifornia.com/
  // http://www.journeywest.com/WB/index.html
  // http://www.johann-sandra.com/backpackdir.htm
  // http://www.geocities.com/amytys/
  // http://www.thruhikers.com/
  // http://www.redcompservices.com/AT/
  // http://www.midwesthiker.com/
  // http://www.host33.com/backpack/
}