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.TH CURLOPT_REDIR_PROTOCOLS 3 "September 21, 2016" "libcurl 7.58.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_REDIR_PROTOCOLS \- set protocols allowed to redirect to
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS, long bitmask);
.SH 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 \fICURLOPT_FOLLOWLOCATION(3)\fP is enabled. This allows you to
limit specific transfers to only be allowed to use a subset of protocols in
redirections.

Protocols denied by \fICURLOPT_PROTOCOLS(3)\fP are not overridden by this
option.

By default libcurl will allow 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. \fICURLPROTO_ALL\fP enables all protocols on
redirect, including those disabled for security.

These are the available protocol defines:
.nf
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
.fi
.SH DEFAULT
All protocols except for FILE, SCP and since 7.40.0 SMB and SMBS.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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);
}
.fi
.SH AVAILABILITY
Added in 7.19.4, before then it would follow all protocols.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_PROTOCOLS "(3), "