Java

CanonicalizeUrl

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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. Chilkat2 Java

import com.chilkatsoft.chilkat2.Spider;

public class ChilkatExample {

    public static void main(String[] args) {
        Spider spider = new Spider();

        // 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:
        System.out.println(spider.canonicalizeUrl("http://www.ChilkatSoft.com/"));

        // CanonicalizeUrl will drop the HTML fragment:
        System.out.println(spider.canonicalizeUrl("http://www.chilkatsoft.com/purchase2.asp#buyZip"));

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

        // Port 80 and 443 are dropped:
        System.out.println(spider.canonicalizeUrl("http://www.chilkatsoft.com:80/purchase2.asp"));
        System.out.println(spider.canonicalizeUrl("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
        System.out.println(spider.canonicalizeUrl("http://www.chilkatsoft.com/index.asp"));
        System.out.println(spider.canonicalizeUrl("http://www.chilkatsoft.com/index.asp"));
        System.out.println(spider.canonicalizeUrl("http://www.chilkatsoft.com/index.php"));
        System.out.println(spider.canonicalizeUrl("http://www.chilkatsoft.com/index.pl"));
        System.out.println(spider.canonicalizeUrl("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/
    }
}