CURLOPT_REDIR_PROTOCOLS(3) Library Functions Manual CURLOPT_REDIR_PROTOCOLS(3)
NAME
CURLOPT_REDIR_PROTOCOLS - protocols allowed to redirect to
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS, long bitmask);
DESCRIPTION
This option is deprecated. We strongly recommend using CUR-
LOPT_REDIR_PROTOCOLS_STR(3) instead because this option cannot control
all available protocols.
Pass a long that holds a bitmask of protocol bits. 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 proto-
cols in redirections.
Protocols denied by CURLOPT_PROTOCOLS(3) are not overridden by this op-
tion.
By default libcurl allows HTTP, HTTPS, FTP and FTPS on redirect
(7.65.2). CURLPROTO_ALL enables all protocols on redirect, including
those otherwise 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 (Added in 7.65.2).
Older versions defaulted to all protocols except FILE, SCP and since
7.40.0 SMB and SMBS.
PROTOCOLS
This functionality affects http only
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, (long)
CURLPROTO_HTTP | CURLPROTO_HTTPS);
/* Perform the request */
curl_easy_perform(curl);
}
}
DEPRECATED
Deprecated since 7.85.0.
AVAILABILITY
Added in curl 7.19.4
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLINFO_SCHEME(3), CURLOPT_DEFAULT_PROTOCOL(3), CURLOPT_PROTOCOLS(3),
CURLOPT_REDIR_PROTOCOLS_STR(3)
libcurl 2026-07-12 CURLOPT_REDIR_PROTOCOLS(3)
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