Must-Match Patterns

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.

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// Needs #include <CkSpider.h>

    CkString strOut;

    //  The Chilkat Spider component/library is free.
    CkSpider spider;

    //  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/");

    bool success;
    success = spider.CrawlNext();

    //  Display the outbound links
    long i;
    const char * url;
    for (i = 0; i <= spider.get_NumOutboundLinks() - 1; i++) {
        strOut.append(spider.getOutboundLink(i));
        strOut.append("\r\n");
    }

    //  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("*~*");

    success = spider.CrawlNext();

    strOut.append("-----------------------");
    strOut.append("\r\n");

    //  Display the outbound links
    for (i = 0; i <= spider.get_NumOutboundLinks() - 1; i++) {
        strOut.append(spider.getOutboundLink(i));
        strOut.append("\r\n");
    }

    //  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/


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());