CURLOPT_PROGRESSDATA − pointer passed to the progress callback
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROGRESSDATA, void *pointer);
Pass a pointer that is untouched by libcurl and passed as the first argument in the progress callback set with CURLOPT_PROGRESSFUNCTION(3).
The default value of this parameter is NULL.
All
struct progress
{
char *private;
size_t size;
};
static size_t
progress_callback(void *clientp,
double dltotal,
double dlnow,
double ultotal,
double ulnow)
{
struct progress *memory = clientp;
printf("private: %p\n", memory->private);
/* use the values */
return 0; /* all
is good */
}
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
struct progress data;
/* pass struct
to callback */
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &data);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION,
progress_callback);
curl_easy_perform(curl);
}
}
Always
Returns CURLE_OK
CURLOPT_PROGRESSFUNCTION(3), CURLOPT_XFERINFOFUNCTION(3)