HTTP HEAD Request

Simple HTTP HEAD request to download only the HTTP header.

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// Needs #include <CkHttp.h>
// Needs #include <CkHttpResponse.h>

    CkString strOut;

    CkHttp http;

    bool success;

    //  Any string unlocks the component for the 1st 30-days.
    success = http.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Send the HEAD request and get the response.
    CkHttpResponse *response = 0;
    response = http.GetHead("http://www.chilkatsoft.com/");

    if (response == 0 ) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
    }
    else {

        //  Show the HTTP response code and header received.
        strOut.append("HTTP response code: ");
        strOut.append("\r\n");
        strOut.appendInt(response->get_StatusCode());
        strOut.append("\r\n");

        strOut.append("---- FULL HEADER ----");
        strOut.append("\r\n");
        strOut.append(response->header());
        strOut.append("\r\n");
        strOut.append("---------------------");
        strOut.append("\r\n");

        //  How big will the full response be?  This is a good way to
        //  check the size of a download (if the URL is a .zip)
        strOut.append("Size of resource = ");
        strOut.appendInt(response->get_ContentLength());
        strOut.append("\r\n");

    }


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());