NAME¶

CURLOPT_TRAILERDATA - pointer passed to trailing headers callback

SYNOPSIS¶

#include <curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TRAILERDATA, void *userdata);

DESCRIPTION¶

Data pointer to be passed to the HTTP trailer callback function.

DEFAULT¶

NULL

PROTOCOLS¶

This functionality affects http only

EXAMPLE¶

struct MyData {


  void *custom;
};
int main(void)
{


  CURL *curl = curl_easy_init();


  if(curl) {


    struct MyData data;


    curl_easy_setopt(curl, CURLOPT_TRAILERDATA, &data);


  }
}

AVAILABILITY¶

Added in curl 7.64.0

RETURN VALUE¶

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO¶

CURLOPT_TRAILERFUNCTION(3), CURLOPT_WRITEFUNCTION(3)