CURLINFO_SCHEME(3) Introduction to Library Functions CURLINFO_SCHEME(3)

NAME

CURLINFO_SCHEME - URL scheme used in transfer

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SCHEME, char **scheme);

DESCRIPTION

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 transfer done with this CURL handle. The scheme might also
sometimes be referred to as the protocol.

The scheme pointer is NULL or points to private memory. You must not
free it. The memory gets freed automatically when you call
curl_easy_cleanup(3) on the corresponding curl handle.

The returned scheme might be upper or lowercase. Do comparisons case
insensitively.

PROTOCOLS

This functionality affects all supported protocols

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

AVAILABILITY

Added in curl 7.52.0

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_EFFECTIVE_URL(3), CURLINFO_PROTOCOL(3),
CURLINFO_RESPONSE_CODE(3), curl_easy_getinfo(3), curl_easy_setopt(3)

libcurl 2026-01-08 CURLINFO_SCHEME(3)