**************************************************************************
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* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
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CURLINFO_SCHEME - get the URL scheme (sometimes called protocol) used in the connection #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SCHEME, char **scheme); Pass a pointer to a char pointer to receive the pointer to a null-terminated string holding the URL scheme used for the most recent connection done with this CURL handle. The scheme pointer will be NULL or pointing to private memory you MUST NOT free - it gets freed when you call curl_easy_cleanup(3) on the corresponding CURL handle. All

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) {
 char *scheme = NULL;
 curl_easy_getinfo(curl, CURLINFO_SCHEME, &scheme);
 if(scheme)
 printf("scheme: %s\\n", scheme); /* scheme: HTTP */
 }
 curl_easy_cleanup(curl);
}

Added in 7.52.0 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), "