Man pages sections > man3 > CURLOPT_DEFAULT_PROTOCOL

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

CURLOPT_DEFAULT_PROTOCOL(3) curl_easy_setopt options CURLOPT_DEFAULT_PROTOCOL(3)

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 schemeless URL. Parsing happens when curl_easy_perform(3) or curl_multi_perform(3) is called. The protocols supported by libcurl will 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

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

CURLOPT_URL(3),
December 21, 2016 libcurl 7.55.1