Send Ping to Yahoo! when RSS Feed is Updated

How to ping Yahoo! when an RSS feed has been updated, using the REST interface.

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#include <C_CkHttp.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    const char * responseText;

    http = CkHttp_Create();

    //  Any string unlocks the component for the 1st 30-days.
    success = CkHttp_UnlockComponent(http,"Anything for 30-day trial");
    if (success != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        return;
    }

    //  Yahoo indicates that The REST interface:
    //  URL: http://ping.feeds.yahoo.com/rss/ping
    //  Parameter(s): u=<site or feed url>
    //  HTTP method: GET

    //  The RSS2 feed URL for blog.chilkatsoft.com is:
    //  http://blog.chilkatsoft.com/?feed=rss2

    //  Send the HTTP GET and return the content in a string.

    responseText = CkHttp_quickGetStr(http,"http://ping.feeds.yahoo.com/rss/ping?u=http://blog.chilkatsoft.com/?feed=rss2");

    printf("%s\n",responseText);

    CkHttp_Dispose(http);

    }