CURLOPT_REDIR_PROTOCOLS(3)                            curl_easy_setopt options

NAME
       CURLOPT_REDIR_PROTOCOLS - set protocols allowed to redirect to

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS, long
       bitmask);

DESCRIPTION
       Pass a long that holds a bitmask of CURLPROTO_* defines. If used, this
       bitmask limits what protocols libcurl may use in a transfer that it
       follows to in a redirect when _FOLLOWLOCATION&section=3">CURLOPT_FOLLOWLOCATION(3) is enabled.
       This allows you to limit specific transfers to only be allowed to use a
       subset of protocols in redirections.

       Protocols denied by _PROTOCOLS&section=3">CURLOPT_PROTOCOLS(3) are not overridden by this
       option.

       By default libcurl will allow HTTP, HTTPS, FTP and FTPS on redirect
       (7.65.2).  Older versions of libcurl allowed all protocols on redirect
       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.
       CURLPROTO_ALL enables all protocols on redirect, including those
       disabled for security.

       These are the available protocol defines:
       CURLPROTO_DICT
       CURLPROTO_FILE
       CURLPROTO_FTP
       CURLPROTO_FTPS
       CURLPROTO_GOPHER
       CURLPROTO_HTTP
       CURLPROTO_HTTPS
       CURLPROTO_IMAP
       CURLPROTO_IMAPS
       CURLPROTO_LDAP
       CURLPROTO_LDAPS
       CURLPROTO_POP3
       CURLPROTO_POP3S
       CURLPROTO_RTMP
       CURLPROTO_RTMPE
       CURLPROTO_RTMPS
       CURLPROTO_RTMPT
       CURLPROTO_RTMPTE
       CURLPROTO_RTMPTS
       CURLPROTO_RTSP
       CURLPROTO_SCP
       CURLPROTO_SFTP
       CURLPROTO_SMB
       CURLPROTO_SMBS
       CURLPROTO_SMTP
       CURLPROTO_SMTPS
       CURLPROTO_TELNET
       CURLPROTO_TFTP

DEFAULT
       HTTP, HTTPS, FTP and FTPS (Since 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,
                          CURLPROTO_HTTP | CURLPROTO_HTTPS);

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

AVAILABILITY
       Added in 7.19.4, before then it would follow all protocols.

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       CURLOPT_PROTOCOLS(3),

libcurl 7.77.0                 November 4, 2020     CURLOPT_REDIR_PROTOCOLS(3)