CURLINFO_HTTP_VERSION(3) Introduction to Library Functions

NAME

CURLINFO_HTTP_VERSION - HTTP version used in the transfer

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTP_VERSION, long *p);

DESCRIPTION

Pass a pointer to a long to receive the version used in the last http
transfer done using this handle. The returned value is
CURL_HTTP_VERSION_1_0, CURL_HTTP_VERSION_1_1, CURL_HTTP_VERSION_2_0,
CURL_HTTP_VERSION_3 or 0 if the version cannot be determined.

PROTOCOLS

This functionality affects http only

EXAMPLE

int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
result = curl_easy_perform(curl);
if(result == CURLE_OK) {
long http_version;
curl_easy_getinfo(curl, CURLINFO_HTTP_VERSION, &http_version);
}
curl_easy_cleanup(curl);
}
}

AVAILABILITY

Added in curl 7.50.0

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_RESPONSE_CODE(3), curl_easy_getinfo(3), curl_easy_setopt(3)

libcurl 2026-01-08 CURLINFO_HTTP_VERSION(3)