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(Unicode C++) CanonicalizeUrl

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.

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#include <CkSpiderW.h>

void ChilkatSample(void)
    {
    CkSpiderW 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:
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.ChilkatSoft.com/"));

    // CanonicalizeUrl will drop the HTML fragment:
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.chilkatsoft.com/purchase2.asp#buyZip"));

    // If a username/password is in the URL, it gets dropped:
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://username:password@www.chilkatsoft.com/purchase2.asp#buyZip"));

    // Port 80 and 443 are dropped:
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.chilkatsoft.com:80/purchase2.asp"));
    wprintf(L"%s\n",spider.canonicalizeUrl(L"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
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.chilkatsoft.com/index.asp"));
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.chilkatsoft.com/index.asp"));
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.chilkatsoft.com/index.php"));
    wprintf(L"%s\n",spider.canonicalizeUrl(L"http://www.chilkatsoft.com/index.pl"));
    wprintf(L"%s\n",spider.canonicalizeUrl(L"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
    }

 

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