NAME

       CURLOPT_REDIR_PROTOCOLS_STR - protocols allowed to redirect to

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS_STR,
                                 char *spec);

DESCRIPTION

       Pass  a  pointer  to  a  string that holds a comma-separated list of case insensitive protocol names (URL
       schemes). That list limits what protocols libcurl may use in a transfer that it follows to in a  redirect
       when CURLOPT_FOLLOWLOCATION(3) is enabled. This option allows applications to limit specific transfers to
       only be allowed to use a subset of protocols in redirections.

       Protocols denied by CURLOPT_PROTOCOLS_STR(3) are not overridden by this option.

       By default libcurl allows HTTP, HTTPS, FTP and FTPS on redirects (since 7.65.2).

       These are the available protocols:

       DICT,  FILE,  FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP,
       RTMPE, RTMPS, RTMPT, RTMPTE, RTMPTS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS, WSS

       You can set "ALL" as a short-cut to enable all protocols. Note  that  by  setting  all,  you  may  enable
       protocols that were not supported the day you write this but are introduced in a future libcurl version.

       If trying to set a non-existing protocol or if no matching protocol at all is set, it returns error.

DEFAULT

       HTTP, HTTPS, FTP and FTPS (Added in 7.65.2).

       Older versions defaulted to all protocols except FILE, SCP and since 7.40.0 SMB and SMBS.

PROTOCOLS

       All

EXAMPLE

       int main(int argc, char **argv)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           /* pass in the URL from an external source */
           curl_easy_setopt(curl, CURLOPT_URL, argv[1]);

           /* only allow redirects to HTTP and HTTPS URLs */
           curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS_STR, "http,https");

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

AVAILABILITY

       Added in 7.85.0.

RETURN VALUE

       Returns  CURLE_UNKNOWN_OPTION  if  the  option is not implemented, CURLE_UNSUPPORTED_PROTOCOL if a listed
       protocol is not supported  or  disabled,  CURLE_BAD_FUNCTION_ARGUMENT  if  no  protocol  is  listed  else
       CURLE_OK.

SEE ALSO

       CURLOPT_PROTOCOLS_STR(3),    CURLINFO_SCHEME(3),    CURLOPT_DEFAULT_PROTOCOL(3),    CURLOPT_PROTOCOLS(3),
       CURLOPT_REDIR_PROTOCOLS(3)

ibcurl 8.5.0                                    December 04, 2023                 CURLOPT_REDIR_PROTOCOLS_STR(3)