CURLOPT_DEFAULT_PROTOCOL(3)                           Library Functions Manual

NAME
       CURLOPT_DEFAULT_PROTOCOL - default protocol to use if the URL is
       missing a scheme name

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DEFAULT_PROTOCOL,
                                 char *protocol);

DESCRIPTION
       This option tells libcurl to use protocol if the URL is missing a
       scheme name.

       Use one of these protocol (scheme) names:

       dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, ldaps,
       pop3, pop3s, rtsp, scp, sftp, smb, smbs, smtp, smtps, telnet, tftp

       An unknown or unsupported protocol causes error
       CURLE_UNSUPPORTED_PROTOCOL when libcurl parses a URL without a scheme.
       Parsing happens when curl_easy_perform(3) or curl_multi_perform(3) is
       called. The protocol set supported by libcurl vary depending on how it
       was built. Use curl_version_info(3) if you need a list of protocol
       names supported by the build of libcurl that you are using.

       This option does not change the default proxy protocol (http).

       Without this option libcurl would make a guess based on the host, see
       CURLOPT_URL(3) for details.

       The application does not have to keep the string around after setting
       this option.

DEFAULT
       NULL (make a guess based on the host)

PROTOCOLS
       All

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           /* set a URL without a scheme */
           curl_easy_setopt(curl, CURLOPT_URL, "example.com");

           /* set the default protocol (scheme) for schemeless URLs */
           curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");

           /* Perform the request */
           curl_easy_perform(curl);
         }
       }

AVAILABILITY
       Added in 7.45.0

RETURN VALUE
       CURLE_OK if the option is supported.

       CURLE_OUT_OF_MEMORY if there was insufficient heap space.

       CURLE_UNKNOWN_OPTION if the option is not supported.

SEE ALSO
       CURLINFO_PROTOCOL(3), CURLINFO_SCHEME(3), CURLOPT_URL(3)

libcurl                          April 02 2024     CURLOPT_DEFAULT_PROTOCOL(3)