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 14--- 15 16# NAME 17 18CURLINFO_HEADER_SIZE - get size of retrieved headers 19 20# SYNOPSIS 21 22~~~c 23#include <curl/curl.h> 24 25CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep); 26~~~ 27 28# DESCRIPTION 29 30Pass a pointer to a long to receive the total size of all the headers 31received. Measured in number of bytes. 32 33The total includes the size of any received headers suppressed by 34CURLOPT_SUPPRESS_CONNECT_HEADERS(3). 35 36# EXAMPLE 37 38~~~c 39int main(void) 40{ 41 CURL *curl = curl_easy_init(); 42 if(curl) { 43 CURLcode res; 44 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 45 res = curl_easy_perform(curl); 46 if(res == CURLE_OK) { 47 long size; 48 res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size); 49 if(!res) 50 printf("Header size: %ld bytes\n", size); 51 } 52 curl_easy_cleanup(curl); 53 } 54} 55~~~ 56 57# AVAILABILITY 58 59Added in 7.4.1 60 61# RETURN VALUE 62 63Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. 64