CURLOPT_TRAILERDATA(3) Library Functions Manual CURLOPT_TRAILERDATA(3)

CURLOPT_TRAILERDATA - pointer passed to trailing headers callback

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

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

NULL

HTTP

struct MyData {
  void *custom;
};
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    struct MyData data;
    curl_easy_setopt(curl, CURLOPT_TRAILERDATA, &data);
  }
}

This option was added in curl 7.64.0 and is present if HTTP support is enabled

Returns CURLE_OK.

CURLOPT_TRAILERFUNCTION(3), CURLOPT_WRITEFUNCTION(3)

2024-05-22 libcurl