CURLINFO_HTTP_VERSION(3) Library Functions Manual CURLINFO_HTTP_VERSION(3) NAME CURLINFO_HTTP_VERSION - get the http version used in the connection SYNOPSIS #include 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 connection 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 res; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); res = curl_easy_perform(curl); if(res == 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 2025-02-08 CURLINFO_HTTP_VERSION(3)