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CURLOPT_REDIR_PROTOCOLS_STR(3)

curl_easy_setopt options                        CURLOPT_REDIR_PROTOCOLS_STR(3)



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  proto‐
       cols  libcurl  may  use  in a transfer that it follows to in a redirect
       when CURLOPT_FOLLOWLOCATION(3) is enabled. This option allows  applica‐
       tions 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  will allow HTTP, HTTPS, FTP and FTPS on redirects
       (since 7.65.2).  Older versions of libcurl allowed all protocols on re‐
       direct  except several disabled for security reasons: Since 7.19.4 FILE
       and SCP are disabled, and since 7.40.0 SMB and SMBS are also disabled.

       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
       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),



libcurl 7.86.0                September 13, 2022
                                                CURLOPT_REDIR_PROTOCOLS_STR(3)
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