Thanks Andrew - of course that makes perfect sense, thanks for your help!

- Josh

                                                                                                                                                   
              Andrew Francis
              <locust_at_familyhealth.com.au> To: curl-library_at_lists.sourceforge.net
              Sent by: cc:
              curl-library-admin_at_lists.sourceforge. Subject: Re: really dumb question I'm sure
              net
                                                                                                                                                   
                                                                                                                                                   
              03/27/2003 10:19 PM
              Please respond to curl-library
                                                                                                                                                   
                                                                                                                                                   

On Thu, Mar 27, 2003 at 03:46:21PM -0500, josh.m.daynard_at_accenture.com
wrote:
> So my question is: is there anyway in libcurl to just tell it not to
bother
> writing the response anywhere?

Define a custom callback function that does nothing:

extern "C" { // use this if, and only if, you're writing C++

size_t callback_noop(void *p, size_t s, size_t nmemb, void *stream) {
             return s * nmemb;
}

} // ditto re: c++

// when about to curl_easy_perform:
curl_easy_setopt(curlHandle, CURLOPT_FILE, NULL);
curl_easy_setopt(curlHandle, CURLOPT_WRITEFUNCTION, curl_noop);
curl_easy_setopt(curlHandle, CURLOPT_HEADERFUNCTION, callback_noop);

This will actually still download all the data though. If you like,
you can get the callback function to cancel the download operation.
You'll get an error returned from curl_easy_perform, but it means
curl won't bother downloading all the data from the web server

size_t callback_noop(void *p, size_t s, size_t nmemb, void *stream) {
             return 0; /* abort transfer */
}

--
Andrew Francis
Software Developer
Family Health Network
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