CURLINFO_HEADER_SIZE(3) Introduction to Library Functions

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

This functionality affects all supported protocols

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 curl 7.4.1

RETURN VALUE

curl_easy_getinfo(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error
occurred, see libcurl-errors(3).

SEE ALSO

CURLINFO_REQUEST_SIZE(3), CURLINFO_SIZE_DOWNLOAD(3),
curl_easy_getinfo(3), curl_easy_setopt(3)

libcurl 2025-02-25 CURLINFO_HEADER_SIZE(3)