1--- 2c: Copyright (C) Daniel Stenberg, <daniel.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) 12--- 13 14# NAME 15 16CURLINFO_HEADER_SIZE - get size of retrieved headers 17 18# SYNOPSIS 19 20~~~c 21#include <curl/curl.h> 22 23CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep); 24~~~ 25 26# DESCRIPTION 27 28Pass a pointer to a long to receive the total size of all the headers 29received. Measured in number of bytes. 30 31The total includes the size of any received headers suppressed by 32CURLOPT_SUPPRESS_CONNECT_HEADERS(3). 33 34# PROTOCOLS 35 36All 37 38# EXAMPLE 39 40~~~c 41int main(void) 42{ 43 CURL *curl = curl_easy_init(); 44 if(curl) { 45 CURLcode res; 46 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 47 res = curl_easy_perform(curl); 48 if(res == CURLE_OK) { 49 long size; 50 res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size); 51 if(!res) 52 printf("Header size: %ld bytes\n", size); 53 } 54 curl_easy_cleanup(curl); 55 } 56} 57~~~ 58 59# AVAILABILITY 60 61Added in 7.4.1 62 63# RETURN VALUE 64 65Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. 66