CURLINFO_HTTP_CONNECTCODE - Man Page

#include <curl/curl.h>

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

Pass a pointer to a long to receive the last received HTTP proxy response code to a CONNECT request. The returned value is zero if no such response code was available.

This functionality affects http only

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

    /* typically CONNECT is used to do HTTPS over HTTP proxies */
    curl_easy_setopt(curl, CURLOPT_PROXY, "http://127.0.0.1");
    res = curl_easy_perform(curl);
    if(res == CURLE_OK) {
      long code;
      res = curl_easy_getinfo(curl, CURLINFO_HTTP_CONNECTCODE, &code);
      if(!res && code)
        printf("The CONNECT response code: %03ld\n", code);
    }
    curl_easy_cleanup(curl);
  }
}

Added in curl 7.10.7

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)

curl_easy_getinfo(3), CURLINFO_RESPONSE_CODE(3).