DataFlex

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. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoSpider
    Integer i
    String sUrl
    String sTemp1
    Integer iTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatSpider)) To hoSpider
    If (Not(IsComObjectCreated(hoSpider))) Begin
        Send CreateComObject of hoSpider
    End

    // --------------------------------------------------------------------
    // Note: The URLs in this example are no longer valid.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...

    Send ComInitialize To hoSpider "directory.google.com"
    Send ComAddUnspidered To hoSpider "http://directory.google.com/Top/Recreation/Outdoors/Hiking/Backpacking/"

    Get ComCrawlNext Of hoSpider To iSuccess

    // Display the outbound links

    Get ComNumOutboundLinks Of hoSpider To iTemp1
    For i From 0 To (iTemp1 - 1)
        Get ComGetOutboundLink Of hoSpider i To sTemp1
        Showln sTemp1
    Loop

    // 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.
    Send ComInitialize To hoSpider "directory.google.com"
    Send ComAddUnspidered To hoSpider "http://directory.google.com/Top/Recreation/Outdoors/Hiking/Backpacking/"

    // Add some must-match patterns:
    Send ComAddMustMatchPattern To hoSpider "*.com/*"
    Send ComAddMustMatchPattern To hoSpider "*.net/*"

    // Add some avoid-patterns:
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*.mypages.*"
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*.personal.*"
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*.comcast.*"
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*.aol.*"
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*~*"

    Get ComCrawlNext Of hoSpider To iSuccess

    Showln "-----------------------"

    // Display the outbound links
    Get ComNumOutboundLinks Of hoSpider To iTemp1
    For i From 0 To (iTemp1 - 1)
        Get ComGetOutboundLink Of hoSpider i To sTemp1
        Showln sTemp1
    Loop

    // 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


End_Procedure