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.

       Using this option multiple times makes the last set string override the
       previous ones. Set it to NULL to disable its use again.

DEFAULT
       NULL (make a guess based on the host)

PROTOCOLS
       This functionality affects all supported protocols

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 curl 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                           2024-12-12       CURLOPT_DEFAULT_PROTOCOL(3)