---

c: Copyright (C) Daniel Stenberg, <daniel.se>, et al. SPDX-License-Identifier: curl Title: CURLINFO_HEADER_SIZE Section: 3 Source: libcurl See-also:

• CURLINFO_REQUEST_SIZE (3)
• CURLINFO_SIZE_DOWNLOAD (3)
• curl_easy_getinfo (3)
• curl_easy_setopt (3)

---

NAME

CURLINFO_HEADER_SIZE - get size of retrieved headers

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep);

DESCRIPTION

Pass a pointer to a long to receive the total size of all the headers received. Measured in number of bytes.

The total includes the size of any received headers suppressed by CURLOPT_SUPPRESS_CONNECT_HEADERS(3).

PROTOCOLS

All

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    res = curl_easy_perform(curl);
    if(res == CURLE_OK) {
      long size;
      res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size);
      if(!res)
        printf("Header size: %ld bytes\n", size);
    }
    curl_easy_cleanup(curl);
  }
}

AVAILABILITY

Added in 7.4.1

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.