1---
2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
3SPDX-License-Identifier: curl
4Title: CURLOPT_TRAILERDATA
5Section: 3
6Source: libcurl
7See-also:
8  - CURLOPT_TRAILERFUNCTION (3)
9  - CURLOPT_WRITEFUNCTION (3)
10Protocol:
11  - HTTP
12Added-in: 7.64.0
13---
14
15# NAME
16
17CURLOPT_TRAILERDATA - pointer passed to trailing headers callback
18
19# SYNOPSIS
20
21~~~c
22#include <curl.h>
23
24CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TRAILERDATA, void *userdata);
25~~~
26
27# DESCRIPTION
28
29Data pointer to be passed to the HTTP trailer callback function.
30
31# DEFAULT
32
33NULL
34
35# %PROTOCOLS%
36
37# EXAMPLE
38
39~~~c
40struct MyData {
41  void *custom;
42};
43
44int main(void)
45{
46  CURL *curl = curl_easy_init();
47  if(curl) {
48    struct MyData data;
49    curl_easy_setopt(curl, CURLOPT_TRAILERDATA, &data);
50  }
51}
52~~~
53
54# %AVAILABILITY%
55
56# RETURN VALUE
57
58Returns CURLE_OK.
59