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CURLOPT_REDIR_PROTOCOLS(3)                            curl_easy_setopt options


CURLOPT_REDIR_PROTOCOLS - set protocols allowed to redirect to


#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REDIR_PROTOCOLS, long bitmask);


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 (Since 7.65.2). Older versions defaulted to all protocols except FILE, SCP and since 7.40.0 SMB and SMBS.




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.


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


CURLOPT_PROTOCOLS(3), libcurl 7.73.0 February 18, 2020 CURLOPT_REDIR_PROTOCOLS(3)

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