PureBasic

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. PureBasic

IncludeFile "CkSpider.pb"

Procedure ChilkatExample()

    spider.i = CkSpider::ckCreate()
    If spider.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; 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:
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.ChilkatSoft.com/")

    ; CanonicalizeUrl will drop the HTML fragment:
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com/purchase2.asp#buyZip")

    ; If a username/password is in the URL, it gets dropped:
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://username:password@www.chilkatsoft.com/purchase2.asp#buyZip")

    ; Port 80 and 443 are dropped:
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com:80/purchase2.asp")
    Debug CkSpider::ckCanonicalizeUrl(spider,"https://www.paypal.com:443/")

    ; 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
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com/index.asp")
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com/index.asp")
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com/index.php")
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com/index.pl")
    Debug CkSpider::ckCanonicalizeUrl(spider,"http://www.chilkatsoft.com/index.htm")

    ; 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


    CkSpider::ckDispose(spider)


    ProcedureReturn
EndProcedure