1---
2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
3SPDX-License-Identifier: curl
4Title: CURLINFO_HEADER_SIZE
5Section: 3
6Source: libcurl
7See-also:
8  - CURLINFO_REQUEST_SIZE (3)
9  - CURLINFO_SIZE_DOWNLOAD (3)
10  - curl_easy_getinfo (3)
11  - curl_easy_setopt (3)
12Protocol:
13  - All
14Added-in: 7.4.1
15---
16
17# NAME
18
19CURLINFO_HEADER_SIZE - get size of retrieved headers
20
21# SYNOPSIS
22
23~~~c
24#include <curl/curl.h>
25
26CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep);
27~~~
28
29# DESCRIPTION
30
31Pass a pointer to a long to receive the total size of all the headers
32received. Measured in number of bytes.
33
34The total includes the size of any received headers suppressed by
35CURLOPT_SUPPRESS_CONNECT_HEADERS(3).
36
37# %PROTOCOLS%
38
39# EXAMPLE
40
41~~~c
42int main(void)
43{
44  CURL *curl = curl_easy_init();
45  if(curl) {
46    CURLcode res;
47    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
48    res = curl_easy_perform(curl);
49    if(res == CURLE_OK) {
50      long size;
51      res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size);
52      if(!res)
53        printf("Header size: %ld bytes\n", size);
54    }
55    curl_easy_cleanup(curl);
56  }
57}
58~~~
59
60# %AVAILABILITY%
61
62# RETURN VALUE
63
64Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
65