Manpages - CURLINFO_HTTP_VERSION.3

CURLINFO_HTTP_VERSION - get the http version used in the connection

#include <curl/curl.h>

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

Pass a pointer to a long to receive the version used in the last http connection. The returned value will be 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.

HTTP

  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);
  }

Added in 7.50.0

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

*CURLINFO_RESPONSE_CODE*(3), *curl_easy_getinfo*(3), *curl_easy_setopt*(3),