DataFlex

Avoiding Outbound Links Matching Patterns

See more Spider Examples

The spider accumulates outbound links when crawling. Your program may specify any number of "avoid patterns" to prevent any link matching at least one of the wildcarded patterns from being added. 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    // Note: The URLs in this example are no longer valid.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 avoid patterns
    // 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/Food/Cheese/"

    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.cheese.com/
    // http://www.cheesediaries.com/
    // http://www.WisDairy.com/
    // http://www.newenglandcheese.com
    // http://www.ilovecheese.com
    // http://www.cheesefromspain.com
    // http://www.realcaliforniacheese.com/
    // http://www.frencheese.co.uk/
    // http://www.cheesesociety.org/
    // http://www.specialcheese.com/queso.htm
    // http://www.franceway.com/cheese/intro.htm
    // http://www.foodsubs.com/Chesfirm.html
    // http://www.cheeseboard.co.uk/
    // http://www.thecheeseweb.com/
    // http://www.vtcheese.com/
    // http://www.coldbacon.com/cheese.html
    // http://www.norwegiancheeses.co.uk/
    // http://www.reluctantgourmet.com/cheese.htm
    // http://www.lancewood.co.za/
    // http://www.switzerlandcheese.ca
    // http://www.frenchcheese.dk/
    // http://www.dolcevita.com/cuisine/cheese/cheese.htm
    // http://cheeseisland.net/
    // http://www.cheestrings.ca/
    // http://www.dreamcheese.co.uk
    // http://hgic.clemson.edu/factsheets/HGIC3506.htm
    // http://www.epicurious.com/cooking/how_to/food_dictionary/entry?id=1815
    // http://www.mousetrapcheese.co.uk
    // http://taquitos.net/yum/gc.shtml
    // http://www.greek-recipe.com/static/greek-cheese
    // http://www.park.org/Netherlands/pavilions/food_and_markets/cheese/introduction.html
    // http://www.dairyfarmers.org/engl/recipes/4_1.asp
    // http://www.prairieridgecheese.com/wischeesguid.html
    // http://dmoz.org/cgi-bin/add.cgi?where=Recreation/Food/Cheese
    // http://dmoz.org/about.html
    // http://dmoz.org/cgi-bin/apply.cgi?where=Recreation/Food/Cheese

    // 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/Food/Cheese/"

    // Add some avoid patterns:
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*dmoz.org*"
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*?id=*"
    Send ComAddAvoidOutboundLinkPattern To hoSpider "*.co.uk*"
    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.cheese.com/
    // http://www.cheesediaries.com/
    // http://www.WisDairy.com/
    // http://www.newenglandcheese.com
    // http://www.ilovecheese.com
    // http://www.cheesefromspain.com
    // http://www.realcaliforniacheese.com/
    // http://www.cheesesociety.org/
    // http://www.specialcheese.com/queso.htm
    // http://www.franceway.com/cheese/intro.htm
    // http://www.foodsubs.com/Chesfirm.html
    // http://www.thecheeseweb.com/
    // http://www.vtcheese.com/
    // http://www.coldbacon.com/cheese.html
    // http://www.reluctantgourmet.com/cheese.htm
    // http://www.lancewood.co.za/
    // http://www.switzerlandcheese.ca
    // http://www.frenchcheese.dk/
    // http://www.dolcevita.com/cuisine/cheese/cheese.htm
    // http://cheeseisland.net/
    // http://www.cheestrings.ca/
    // http://hgic.clemson.edu/factsheets/HGIC3506.htm
    // http://taquitos.net/yum/gc.shtml
    // http://www.greek-recipe.com/static/greek-cheese
    // http://www.park.org/Netherlands/pavilions/food_and_markets/cheese/introduction.html
    // http://www.dairyfarmers.org/engl/recipes/4_1.asp
    // http://www.prairieridgecheese.com/wischeesguid.htm


End_Procedure