CURLOPT_REDIR_PROTOCOLS - protocols allowed to redirect to
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS, long bitmask);
This option is deprecated. We strongly recommend using
CURLOPT_REDIR_PROTOCOLS_STR(3) instead because this option cannot
control all available protocols!
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
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
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
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.
All
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);
}
Added in 7.19.4, before then it would follow all protocols. Deprecated since
7.85.0.
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
CURLOPT_PROTOCOLS(3),