DataFlex

CanonicalizeUrl

See more Spider Examples

The CanonicalizeUrl method is a utility function that canonicalizes a URL into a standard form to avoid duplicates. For example, "http://www.chilkatsoft.com/" and "http://www.chilkatsoft.com/default.asp" are the same URL. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoSpider
    String sTemp1

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

    // Does a DNS lookup to find the default domain, which may or may not include the "www." depending on the DNS results.
    // Also domain names are converted to lowercase:
    Get ComCanonicalizeUrl Of hoSpider "http://www.ChilkatSoft.com/" To sTemp1
    Showln sTemp1

    // CanonicalizeUrl will drop the HTML fragment:
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com/purchase2.asp#buyZip" To sTemp1
    Showln sTemp1

    // If a username/password is in the URL, it gets dropped:
    Get ComCanonicalizeUrl Of hoSpider "http://username:password@www.chilkatsoft.com/purchase2.asp#buyZip" To sTemp1
    Showln sTemp1

    // Port 80 and 443 are dropped:
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com:80/purchase2.asp" To sTemp1
    Showln sTemp1
    Get ComCanonicalizeUrl Of hoSpider "https://www.paypal.com:443/" To sTemp1
    Showln sTemp1

    // Removes default pages:
    // default.asp, index.html, index.htm, default.html, index.htm, default.htm
    // index.php, index.asp, default.php, .cfm, .aspx, ,php3, .pl, .cgi, .txt, .shtml, .phtml
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com/index.asp" To sTemp1
    Showln sTemp1
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com/index.asp" To sTemp1
    Showln sTemp1
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com/index.php" To sTemp1
    Showln sTemp1
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com/index.pl" To sTemp1
    Showln sTemp1
    Get ComCanonicalizeUrl Of hoSpider "http://www.chilkatsoft.com/index.htm" To sTemp1
    Showln sTemp1

    // Output:
    // http://chilkatsoft.com/
    // http://chilkatsoft.com/purchase2.asp
    // http://chilkatsoft.com/purchase2.asp
    // http://chilkatsoft.com/purchase2.asp
    // https://www.paypal.com/
    // http://chilkatsoft.com/
    // http://chilkatsoft.com/
    // http://chilkatsoft.com/
    // http://chilkatsoft.com/
    // http://chilkatsoft.com


End_Procedure