> Subject: How to get/retrieve data return after doing a post request ?
> I tried to figure out the CURLOPT_WRITEDATA and
> CURLOPT_WRITEFUNCTION but to no avail.
>
> Can anybody help me how i can process or save the data
> after i do POST request so that i can save them to a variable
> and parse important bits from them later.
>
> Im totally new on this. Im using C on a win32 platform.
>
> Thanks!

The following is rough idea

/* pass your data struc used to hold returned data into callback */
curl_easy_setopt(m_curlHandle, CURLOPT_WRITEDATA, (void *)<your data>);

/* specify your callback function */
curl_easy_setopt(m_curlHandle, CURLOPT_WRITEFUNCTION, <your callback func_name>);

/* your callback impl */
size_t <your callback func_name>(void *ptr, size_t size, size_t nmemb, void *data)
{
    /**
     * have to copy data from libcurl reused buffers to our own buffer in case
     * data is overwritten. Once the whole response data is copied to
     * our buffer and gets constructed, application can start to handle it.
     */
    ((<your data struc> *)data)->copyToBuffer((char*)ptr, size*nmemb);

    return size*nmemb;
}

<your data struc>
{
    char *data;

    copyToBuffer(char *ptr, unsigned int len)
    {
        //memcpy(data, ptr, len);
    }
}

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Received on 2003-11-12