Hi Dan,
   Thanks for the response. The following is the seek function call back

int seek_callback(void *userp, curl_off_t offset, int origin){
    FILE* in = static_cast<FILE *>userp;
    long f_offset = (long) offset;
    int ret = fseek(in, f_offset, origin);
    return ret;
}

The following is how curl opt is set

        void* userp;

        res = curl_easy_setopt(d_curl, CURLOPT_SEEKDATA, *userp);
        if (res != CURLE_OK)
             throw CurlError(res);
        res = curl_easy_setopt(*userp, CURLOPT_SEEKFUNCTION, seek_callback);
        if (res != CURLE_OK)
             throw CurlError(res);

Please let me know if something is done incorrectly.

Thanks,
Biju
On Thu, Sep 29, 2016 at 2:00 PM, Dan Fandrich <dan_at_coneharvesters.com>
wrote:

> On Wed, Sep 28, 2016 at 02:17:00PM -0400, Biju N wrote:
> > Hello There,
> > If you have defined and used curlopt_seekfunction, could you please
> share a
> > sample. Currently I am trying to pass the values from the call back to
> "fseek"
> > by casting the void* and offset without success.
> >
> > void* is cast to file* and offset to int. Not sure whether that is the
> correct
> > approach. Any help with this is much appreciated.
>
> Can you show us the code snippet doing this? As long as you set the FILE*
> with
> CURLOPT_SEEKDATA, and as long as your fseek() takes an int (it's probably a
> long) your approach sounds fine.
>
> >>> Dan
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Received on 2016-09-30